* Stable release.

.gitignore

@@ -1,262 +0,0 @@
-# START "git svn show-ignore"
-
-# /
-/Makefile
-/Makefile.in
-/aclocal.m4
-/autom4te.cache
-/config.*
-/configure
-/nix.spec
-/stamp-h1
-/svn-revision
-/NEWS
-/libtool
-
-# /config/
-/config/config.guess
-/config/config.sub
-/config/depcomp
-/config/install-sh
-/config/missing
-/config/mkinstalldirs
-/config/ltmain.sh
-
-# /corepkgs/
-/corepkgs/Makefile
-/corepkgs/Makefile.in
-
-# /corepkgs/buildenv/
-/corepkgs/buildenv/Makefile.in
-/corepkgs/buildenv/Makefile
-/corepkgs/buildenv/builder.pl
-
-# /corepkgs/channels/
-/corepkgs/channels/Makefile.in
-/corepkgs/channels/Makefile
-/corepkgs/channels/unpack.sh
-
-# /corepkgs/nar/
-/corepkgs/nar/Makefile
-/corepkgs/nar/Makefile.in
-/corepkgs/nar/nar.sh
-/corepkgs/nar/unnar.sh
-
-# /doc/
-/doc/Makefile
-/doc/Makefile.in
-
-# /doc/manual/
-/doc/manual/Makefile
-/doc/manual/Makefile.in
-/doc/manual/manual.html
-/doc/manual/manual.is-valid
-/doc/manual/*.1
-/doc/manual/*.8
-/doc/manual/images
-/doc/manual/version.txt
-/doc/manual/NEWS.html
-/doc/manual/NEWS.txt
-
-# /externals/
-/externals/Makefile
-/externals/Makefile.in
-/externals/aterm-*
-/externals/have-aterm
-/externals/build-aterm
-/externals/inst-aterm
-/externals/bzip2-*
-/externals/have-bzip2
-/externals/build-bzip2
-/externals/inst-bzip2
-
-# /make/examples/aterm/
-/make/examples/aterm/result*
-
-# /make/examples/aterm/aterm/
-/make/examples/aterm/aterm/*
-
-# /make/examples/aterm/test/
-/make/examples/aterm/test/*
-
-# /misc/
-/misc/Makefile.in
-/misc/Makefile
-
-# /misc/emacs/
-/misc/emacs/Makefile.in
-/misc/emacs/Makefile
-
-# /scripts/
-/scripts/Makefile
-/scripts/Makefile.in
-/scripts/nix-profile.sh
-/scripts/nix-pull
-/scripts/nix-push
-/scripts/nix-switch
-/scripts/nix-collect-garbage
-/scripts/nix-prefetch-url
-/scripts/nix-install-package
-/scripts/nix-channel
-/scripts/nix-build
-/scripts/nix-copy-closure
-/scripts/readmanifest.pm
-/scripts/readconfig.pm
-/scripts/download-using-manifests.pl
-/scripts/copy-from-other-stores.pl
-/scripts/generate-patches.pl
-/scripts/find-runtime-roots.pl
-/scripts/build-remote.pl
-
-# /src/
-/src/Makefile
-/src/Makefile.in
-
-# /src/bin2c/
-/src/bin2c/Makefile.in
-/src/bin2c/Makefile
-/src/bin2c/bin2c
-/src/bin2c/.deps
-/src/bin2c/.libs
-
-# /src/boost/
-/src/boost/Makefile
-/src/boost/Makefile.in
-
-# /src/boost/format/
-/src/boost/format/Makefile
-/src/boost/format/Makefile.in
-/src/boost/format/.deps
-/src/boost/format/libformat.a
-/src/boost/format/.libs
-
-# /src/bsdiff-4.3/
-/src/bsdiff-4.3/Makefile
-/src/bsdiff-4.3/Makefile.in
-/src/bsdiff-4.3/bsdiff
-/src/bsdiff-4.3/bspatch
-/src/bsdiff-4.3/.deps
-/src/bsdiff-4.3/.libs
-
-# /src/libexpr/
-/src/libexpr/Makefile
-/src/libexpr/Makefile.in
-/src/libexpr/.deps
-/src/libexpr/libexpr.a
-/src/libexpr/lexer-tab.cc
-/src/libexpr/lexer-tab.hh
-/src/libexpr/parser-tab.cc
-/src/libexpr/parser-tab.hh
-/src/libexpr/parser-tab.output
-/src/libexpr/nixexpr-ast.hh
-/src/libexpr/nixexpr-ast.cc
-/src/libexpr/.libs
-/src/libexpr/nix.tbl
-
-# /src/libmain/
-/src/libmain/Makefile
-/src/libmain/Makefile.in
-/src/libmain/.deps
-/src/libmain/libmain.a
-/src/libmain/.libs
-
-# /src/libstore/
-/src/libstore/Makefile
-/src/libstore/Makefile.in
-/src/libstore/.deps
-/src/libstore/libstore.a
-/src/libstore/derivations-ast.cc
-/src/libstore/derivations-ast.hh
-/src/libstore/.libs
-
-# /src/libutil/
-/src/libutil/Makefile
-/src/libutil/Makefile.in
-/src/libutil/.deps
-/src/libutil/libutil.a
-/src/libutil/.libs
-
-# /src/nix-env/
-/src/nix-env/Makefile.in
-/src/nix-env/Makefile
-/src/nix-env/.deps
-/src/nix-env/nix-env
-/src/nix-env/help.txt.hh
-/src/nix-env/.libs
-
-# /src/nix-hash/
-/src/nix-hash/Makefile
-/src/nix-hash/Makefile.in
-/src/nix-hash/.deps
-/src/nix-hash/.libs
-/src/nix-hash/nix-hash
-/src/nix-hash/help.txt.hh
-
-# /src/nix-instantiate/
-/src/nix-instantiate/Makefile.in
-/src/nix-instantiate/Makefile
-/src/nix-instantiate/.deps
-/src/nix-instantiate/nix-instantiate
-/src/nix-instantiate/help.txt.hh
-/src/nix-instantiate/.libs
-
-# /src/nix-log2xml/
-/src/nix-log2xml/Makefile.in
-/src/nix-log2xml/Makefile
-/src/nix-log2xml/.deps
-/src/nix-log2xml/nix-log2xml
-/src/nix-log2xml/test*.*
-/src/nix-log2xml/.libs
-/src/nix-log2xml/*.log
-/src/nix-log2xml/*.xml
-/src/nix-log2xml/*.html
-
-# /src/nix-setuid-helper/
-/src/nix-setuid-helper/Makefile.in
-/src/nix-setuid-helper/Makefile
-/src/nix-setuid-helper/.deps
-/src/nix-setuid-helper/nix-setuid-helper
-/src/nix-setuid-helper/help.txt.hh
-/src/nix-setuid-helper/.libs
-
-# /src/nix-store/
-/src/nix-store/Makefile
-/src/nix-store/Makefile.in
-/src/nix-store/.deps
-/src/nix-store/help.txt.hh
-/src/nix-store/nix-store
-/src/nix-store/.libs
-
-# /src/nix-worker/
-/src/nix-worker/Makefile.in
-/src/nix-worker/Makefile
-/src/nix-worker/.deps
-/src/nix-worker/nix-worker
-/src/nix-worker/help.txt.hh
-/src/nix-worker/.libs
-
-# /tests/
-/tests/Makefile
-/tests/Makefile.in
-/tests/test-tmp
-/tests/config.nix
-/tests/common.sh
-/tests/dummy
-
-# /tests/lang/
-/tests/lang/*.out
-/tests/lang/*.out.xml
-/tests/lang/*.ast
-
-# END "git svn show-ignore"
-
-*.lo
-*.la
-*.o
-*~
-
-# GNU Global
-GPATH
-GRTAGS
-GSYMS
-GTAGS

AUTHORS

@@ -1,8 +0,0 @@
-The following people contributed to Nix, in alphabetical order:
-
-Martin Bravenboer
-Eelco Dolstra
-Niels Janssen
-Armijn Hemel
-Rob Vermaas
-Eelco Visser

COPYING

@@ -1,397 +1,221 @@
-		  GNU LESSER GENERAL PUBLIC LICENSE
-		       Version 2.1, February 1999
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
 
- Copyright (C) 1991, 1999 Free Software Foundation, Inc.
- 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
-[This is the first released version of the Lesser GPL.  It also counts
- as the successor of the GNU Library Public License, version 2, hence
- the version number 2.1.]
-
 			    Preamble
 
   The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
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-free software--to make sure the software is free for all its users.
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
 
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-structure layouts and accessors, and small macros and small inline
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-file is unrestricted, regardless of whether it is legally a derivative
-work.  (Executables containing this object code plus portions of the
-Library will still fall under Section 6.)
-
-  Otherwise, if the work is a derivative of the Library, you may
-distribute the object code for the work under the terms of Section 6.
-Any executables containing that work also fall under Section 6,
-whether or not they are linked directly with the Library itself.
 
-  6. As an exception to the Sections above, you may also combine or
-link a "work that uses the Library" with the Library to produce a
-work containing portions of the Library, and distribute that work
-under terms of your choice, provided that the terms permit
-modification of the work for the customer's own use and reverse
-engineering for debugging such modifications.
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
 
-  You must give prominent notice with each copy of the work that the
-Library is used in it and that the Library and its use are covered by
-this License.  You must supply a copy of this License.  If the work
-during execution displays copyright notices, you must include the
-copyright notice for the Library among them, as well as a reference
-directing the user to the copy of this License.  Also, you must do one
-of these things:
-
-    a) Accompany the work with the complete corresponding
-    machine-readable source code for the Library including whatever
-    changes were used in the work (which must be distributed under
-    Sections 1 and 2 above); and, if the work is an executable linked
-    with the Library, with the complete machine-readable "work that
-    uses the Library", as object code and/or source code, so that the
-    user can modify the Library and then relink to produce a modified
-    executable containing the modified Library.  (It is understood
-    that the user who changes the contents of definitions files in the
-    Library will not necessarily be able to recompile the application
-    to use the modified definitions.)
-
-    b) Use a suitable shared library mechanism for linking with the
-    Library.  A suitable mechanism is one that (1) uses at run time a
-    copy of the library already present on the user's computer system,
-    rather than copying library functions into the executable, and (2)
-    will operate properly with a modified version of the library, if
-    the user installs one, as long as the modified version is
-    interface-compatible with the version that the work was made with.
-
-    c) Accompany the work with a written offer, valid for at
-    least three years, to give the same user the materials
-    specified in Subsection 6a, above, for a charge no more
-    than the cost of performing this distribution.
-
-    d) If distribution of the work is made by offering access to copy
-    from a designated place, offer equivalent access to copy the above
-    specified materials from the same place.
-
-    e) Verify that the user has already received a copy of these
-    materials or that you have already sent this user a copy.
-
-  For an executable, the required form of the "work that uses the
-Library" must include any data and utility programs needed for
-reproducing the executable from it.  However, as a special exception,
-the materials to be distributed need not include anything that is
-normally distributed (in either source or binary form) with the major
-components (compiler, kernel, and so on) of the operating system on
-which the executable runs, unless that component itself accompanies
-the executable.
-
-  It may happen that this requirement contradicts the license
-restrictions of other proprietary libraries that do not normally
-accompany the operating system.  Such a contradiction means you cannot
-use both them and the Library together in an executable that you
-distribute.
-
-  7. You may place library facilities that are a work based on the
-Library side-by-side in a single library together with other library
-facilities not covered by this License, and distribute such a combined
-library, provided that the separate distribution of the work based on
-the Library and of the other library facilities is otherwise
-permitted, and provided that you do these two things:
-
-    a) Accompany the combined library with a copy of the same work
-    based on the Library, uncombined with any other library
-    facilities.  This must be distributed under the terms of the
-    Sections above.
-
-    b) Give prominent notice with the combined library of the fact
-    that part of it is a work based on the Library, and explaining
-    where to find the accompanying uncombined form of the same work.
-
-  8. You may not copy, modify, sublicense, link with, or distribute
-the Library except as expressly provided under this License.  Any
-attempt otherwise to copy, modify, sublicense, link with, or
-distribute the Library is void, and will automatically terminate your
-rights under this License.  However, parties who have received copies,
-or rights, from you under this License will not have their licenses
-terminated so long as such parties remain in full compliance.
-
-  9. You are not required to accept this License, since you have not
+  5. You are not required to accept this License, since you have not
 signed it.  However, nothing else grants you permission to modify or
-distribute the Library or its derivative works.  These actions are
+distribute the Program or its derivative works.  These actions are
 prohibited by law if you do not accept this License.  Therefore, by
-modifying or distributing the Library (or any work based on the
-Library), you indicate your acceptance of this License to do so, and
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
 all its terms and conditions for copying, distributing or modifying
-the Library or works based on it.
+the Program or works based on it.
 
-  10. Each time you redistribute the Library (or any work based on the
-Library), the recipient automatically receives a license from the
-original licensor to copy, distribute, link with or modify the Library
-subject to these terms and conditions.  You may not impose any further
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
 restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties with
+You are not responsible for enforcing compliance by third parties to
 this License.
-
-  11. If, as a consequence of a court judgment or allegation of patent
+
+  7. If, as a consequence of a court judgment or allegation of patent
 infringement or for any other reason (not limited to patent issues),
 conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
 excuse you from the conditions of this License.  If you cannot
 distribute so as to satisfy simultaneously your obligations under this
 License and any other pertinent obligations, then as a consequence you
-may not distribute the Library at all.  For example, if a patent
-license would not permit royalty-free redistribution of the Library by
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
 all those who receive copies directly or indirectly through you, then
 the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Library.
+refrain entirely from distribution of the Program.
 
-If any portion of this section is held invalid or unenforceable under any
-particular circumstance, the balance of the section is intended to apply,
-and the section as a whole is intended to apply in other circumstances.
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
 
 It is not the purpose of this section to induce you to infringe any
 patents or other property right claims or to contest validity of any
 such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system which is
+integrity of the free software distribution system, which is
 implemented by public license practices.  Many people have made
 generous contributions to the wide range of software distributed
 through that system in reliance on consistent application of that
@@ -401,104 +225,116 @@ impose that choice.
 
 This section is intended to make thoroughly clear what is believed to
 be a consequence of the rest of this License.
-
-  12. If the distribution and/or use of the Library is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Library under this License may add
-an explicit geographical distribution limitation excluding those countries,
-so that distribution is permitted only in or among countries not thus
-excluded.  In such case, this License incorporates the limitation as if
-written in the body of this License.
-
-  13. The Free Software Foundation may publish revised and/or new
-versions of the Lesser General Public License from time to time.
-Such new versions will be similar in spirit to the present version,
-but may differ in detail to address new problems or concerns.
-
-Each version is given a distinguishing version number.  If the Library
-specifies a version number of this License which applies to it and
-"any later version", you have the option of following the terms and
-conditions either of that version or of any later version published by
-the Free Software Foundation.  If the Library does not specify a
-license version number, you may choose any version ever published by
-the Free Software Foundation.
 
-  14. If you wish to incorporate parts of the Library into other free
-programs whose distribution conditions are incompatible with these,
-write to the author to ask for permission.  For software which is
-copyrighted by the Free Software Foundation, write to the Free
-Software Foundation; we sometimes make exceptions for this.  Our
-decision will be guided by the two goals of preserving the free status
-of all derivatives of our free software and of promoting the sharing
-and reuse of software generally.
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
 
 			    NO WARRANTY
 
-  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
-WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
-EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
-OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
-KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
-LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
-THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
 
-  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
-WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
-AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
-FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
-CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
-LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
-RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
-FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
-SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
-DAMAGES.
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
 
 		     END OF TERMS AND CONDITIONS
 
-           How to Apply These Terms to Your New Libraries
+	    How to Apply These Terms to Your New Programs
 
-  If you develop a new library, and you want it to be of the greatest
-possible use to the public, we recommend making it free software that
-everyone can redistribute and change.  You can do so by permitting
-redistribution under these terms (or, alternatively, under the terms of the
-ordinary General Public License).
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
 
-  To apply these terms, attach the following notices to the library.  It is
-safest to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least the
-"copyright" line and a pointer to where the full notice is found.
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
 
-    <one line to give the library's name and a brief idea of what it does.>
+    <one line to give the program's name and a brief idea of what it does.>
     Copyright (C) <year>  <name of author>
 
-    This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Lesser General Public
-    License as published by the Free Software Foundation; either
-    version 2.1 of the License, or (at your option) any later version.
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
 
-    This library is distributed in the hope that it will be useful,
+    This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Lesser General Public License for more details.
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
-    You should have received a copy of the GNU Lesser General Public
-    License along with this library; if not, write to the Free Software
-    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 
 Also add information on how to contact you by electronic and paper mail.
 
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year  name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
 You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the library, if
+school, if any, to sign a "copyright disclaimer" for the program, if
 necessary.  Here is a sample; alter the names:
 
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the
-  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
 
-  <signature of Ty Coon>, 1 April 1990
+  <signature of Ty Coon>, 1 April 1989
   Ty Coon, President of Vice
 
-That's all there is to it!
-
-
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.

Makefile.am

@@ -1,48 +1,30 @@
-SUBDIRS = externals src scripts corepkgs doc misc tests
-EXTRA_DIST = substitute.mk nix.spec nix.spec.in bootstrap.sh \
-  nix.conf.example NEWS version
-
-pkginclude_HEADERS = config.h
+SUBDIRS = externals src scripts corepkgs doc
+EXTRA_DIST = substitute.mk nix.spec nix.spec.in
 
 include ./substitute.mk
 
 nix.spec: nix.spec.in
 
+rpm: nix.spec dist
+	rpm $(EXTRA_RPM_FLAGS) -ta $(distdir).tar.gz
+
+relname:
+	echo -n $(distdir) > relname
+
 install-data-local: init-state
-	$(INSTALL) -d $(DESTDIR)$(sysconfdir)/nix
-	$(INSTALL_DATA) $(srcdir)/nix.conf.example $(DESTDIR)$(sysconfdir)/nix
-	if ! test -e $(DESTDIR)$(sysconfdir)/nix/nix.conf; then \
-		$(INSTALL_DATA) $(srcdir)/nix.conf.example $(DESTDIR)$(sysconfdir)/nix/nix.conf; \
-	fi
-	$(INSTALL) -d $(DESTDIR)$(docdir)
-	$(INSTALL_DATA) README $(DESTDIR)$(docdir)/
 
 if INIT_STATE
-
-# For setuid operation, you can enable the following:
-# INIT_FLAGS = -g @NIX_GROUP@ -o @NIX_USER@
-# GROUP_WRITABLE = -m 775
-
 init-state:
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/nix
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/nix/db
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/log/nix
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/log/nix/drvs
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/nix/profiles
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/nix/gcroots
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/nix/temproots
-	ln -sfn $(localstatedir)/nix/profiles $(DESTDIR)$(localstatedir)/nix/gcroots/profiles
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/nix/userpool
-	-$(INSTALL) $(INIT_FLAGS) -m 1777 -d $(DESTDIR)$(storedir)
-	$(INSTALL) $(INIT_FLAGS) $(GROUP_WRITABLE) -d $(DESTDIR)$(localstatedir)/nix/manifests
-	ln -sfn $(localstatedir)/nix/manifests $(DESTDIR)$(localstatedir)/nix/gcroots/manifests
-
+	$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix
+	$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/db
+	$(INSTALL) -d $(DESTDIR)$(localstatedir)/log/nix
+	$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/profiles
+	$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/gcroots
+	$(INSTALL) -d $(DESTDIR)$(localstatedir)/nix/gcroots/tmp
+	rm -f $(DESTDIR)$(localstatedir)/nix/gcroots/profiles
+	ln -s $(localstatedir)/nix/profiles $(DESTDIR)$(localstatedir)/nix/gcroots/profiles
+	$(INSTALL) -d $(DESTDIR)$(prefix)/store
+#	$(bindir)/nix-store --init
 else
-
 init-state:
-
 endif
-
-NEWS:
-	$(MAKE) -C doc/manual NEWS.txt
-	cp $(srcdir)/doc/manual/NEWS.txt NEWS

README

@@ -1,10 +1,5 @@
-Nix is a purely functional package manager.  For installation and
-usage instructions, please read the manual, which can be found in
-`docs/manual/manual.html', and additionally at the Nix website at
-<http://nixos.org/>.
+                             *** Nix ***
 
-
-Acknowledgments
-
-This product includes software developed by the OpenSSL Project for
-use in the OpenSSL Toolkit (http://www.OpenSSL.org/).
+For installation and usage instructions, please read the manual, which
+can be found in `docs/manual/manual.html', and additionally at the Nix
+website at <http://www.cs.uu.nl/groups/ST/Trace/Nix>.

aterm-gc.supp

@@ -1,149 +0,0 @@
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Cond
-   fun:*
-   fun:AT_collect_minor
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Cond
-   fun:*
-   fun:*
-   fun:AT_collect_minor
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value4
-   fun:*
-   fun:AT_collect_minor
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value8
-   fun:*
-   fun:AT_collect_minor
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value4
-   fun:*
-   fun:*
-   fun:AT_collect_minor
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value8
-   fun:*
-   fun:*
-   fun:AT_collect_minor
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Addr4
-   fun:*
-   fun:AT_collect_minor
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Addr8
-   fun:*
-   fun:AT_collect_minor
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Cond
-   fun:*
-   fun:AT_collect
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value4
-   fun:*
-   fun:AT_collect
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value8
-   fun:*
-   fun:AT_collect
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Addr4
-   fun:*
-   fun:AT_collect
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Addr8
-   fun:*
-   fun:AT_collect
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value4
-   fun:*
-   fun:*
-   fun:AT_collect
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value8
-   fun:*
-   fun:*
-   fun:AT_collect
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Cond
-   fun:*
-   fun:*
-   fun:AT_collect
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value4
-   fun:*
-   fun:*
-   fun:mark_phase
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Cond
-   fun:*
-   fun:*
-   fun:mark_phase
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Value4
-   fun:*
-   fun:*
-   fun:mark_phase_young
-}
-
-{
-   ATerm library conservatively scans for GC roots
-   Memcheck:Cond
-   fun:*
-   fun:*
-   fun:mark_phase_young
-}

blacklisting/check-env.pl

@@ -1,252 +0,0 @@
-#! /usr/bin/perl -w -I /home/eelco/.nix-profile/lib/site_perl
-
-use strict;
-use XML::LibXML;
-#use XML::Simple;
-
-my $blacklistFN = shift @ARGV;
-die unless defined $blacklistFN;
-my $userEnv = shift @ARGV;
-die unless defined $userEnv;
-
-
-# Read the blacklist.
-my $parser = XML::LibXML->new();
-my $blacklist = $parser->parse_file($blacklistFN)->getDocumentElement;
-
-#print $blacklist->toString() , "\n";
-
-
-# Get all the elements of the user environment.
-my $userEnvElems = `nix-store --query --references '$userEnv'`;
-die "cannot query user environment elements" if $? != 0;
-my @userEnvElems = split ' ', $userEnvElems;
-
-
-my %storePathHashes;
-
-
-sub getElemNodes {
-    my $node = shift;
-    my @elems = ();
-    foreach my $node ($node->getChildNodes) {
-        push @elems, $node if $node->nodeType == XML_ELEMENT_NODE;
-    }
-    return @elems;
-}
-
-
-my %referencesCache;
-sub getReferences {
-    my $path = shift;
-    return $referencesCache{$path} if defined $referencesCache{$path};
-    
-    my $references = `nix-store --query --references '$path'`;
-    die "cannot query references" if $? != 0;
-    $referencesCache{$path} = [split ' ', $references];
-    
-    return $referencesCache{$path};
-}
-
-
-my %attrsCache;
-sub getAttr {
-    my $path = shift;
-    my $name = shift;
-    my $key = "$path/$name";
-    return $referencesCache{$key} if defined $referencesCache{$key};
-
-    my $value = `nix-store --query --binding '$name' '$path' 2> /dev/null`;
-    $value = "" if $? != 0; # !!!
-    chomp $value;
-    $referencesCache{$key} = $value;
-
-    return $value;
-}
-
-
-sub evalCondition;
-
-
-sub traverse {
-    my $done = shift;
-    my $set = shift;
-    my $path = shift;
-    my $stopCondition = shift;
-
-    return if defined $done->{$path};
-    $done->{$path} = 1;
-    $set->{$path} = 1;
-
-#    print "  in $path\n";
-
-    if (!evalCondition({$path => 1}, $stopCondition)) {
-#        print "  STOPPING in $path\n";
-        return;
-    }
-
-    # Get the requisites of the deriver.
-
-    foreach my $reference (@{getReferences $path}) {
-        traverse($done, $set, $reference, $stopCondition);
-    }
-}
-
-
-sub evalSet {
-    my $inSet = shift;
-    my $expr = shift;
-    my $name = $expr->getName;
-    
-    if ($name eq "traverse") {
-        my $stopCondition = (getElemNodes $expr)[0];
-        my $done = { };
-        my $set = { };
-        foreach my $path (keys %{$inSet}) {
-            traverse($done, $set, $path, $stopCondition);
-        }
-        return $set;
-    }
-
-    else {
-        die "unknown element `$name'";
-    }
-}
-
-
-# Function for evaluating conditions.
-sub evalCondition {
-    my $storePaths = shift;
-    my $condition = shift;
-    my $elemName = $condition->getName;
-    
-    if ($elemName eq "containsSource") {
-        my $hash = $condition->attributes->getNamedItem("hash")->getValue;
-        foreach my $path (keys %{$storePathHashes{$hash}}) {
-            return 1 if defined $storePaths->{$path};
-        }
-        return 0;
-    }
-
-    elsif ($elemName eq "hasName") { 
-        my $nameRE = $condition->attributes->getNamedItem("name")->getValue;
-        foreach my $path (keys %{$storePaths}) {
-            return 1 if $path =~ /$nameRE/;
-        }
-        return 0;
-    }
-    
-    elsif ($elemName eq "hasAttr") { 
-        my $name = $condition->attributes->getNamedItem("name")->getValue;
-        my $valueRE = $condition->attributes->getNamedItem("value")->getValue;
-        foreach my $path (keys %{$storePaths}) {
-            if ($path =~ /\.drv$/) {
-                my $value = getAttr($path, $name);
-#                print "    $path $name $value\n";
-                return 1 if $value =~ /$valueRE/;
-            }
-        }
-        return 0;
-    }
-    
-    elsif ($elemName eq "and") {
-        my $result = 1;
-        foreach my $node (getElemNodes $condition) {
-            $result &= evalCondition($storePaths, $node);
-        }
-        return $result;
-    }
-
-    elsif ($elemName eq "not") {
-        return !evalCondition($storePaths, (getElemNodes $condition)[0]);
-    }
-    
-    elsif ($elemName eq "within") {
-        my @elems = getElemNodes $condition;
-        my $set = evalSet($storePaths, $elems[0]);
-        return evalCondition($set, $elems[1]);
-    }
-
-    elsif ($elemName eq "true") {
-        return 1;
-    }
-
-    elsif ($elemName eq "false") {
-        return 0;
-    }
-
-    else {
-        die "unknown element `$elemName'";
-    }
-}
-
-
-sub evalOr {
-    my $storePaths = shift;
-    my $nodes = shift;
-
-    my $result = 0;
-    foreach my $node (@{$nodes}) {
-        $result |= evalCondition($storePaths, $node);
-    }
-    
-    return $result;
-}
-
-
-# Iterate over all elements, check them.
-foreach my $userEnvElem (@userEnvElems) {
-
-    # Get the deriver of this path.
-    my $deriver = `nix-store --query --deriver '$userEnvElem'`;
-    die "cannot query deriver" if $? != 0;
-    chomp $deriver;
-
-    if ($deriver eq "unknown-deriver") {
-#        print "  deriver unknown, cannot check sources\n";
-        next;
-    }
-
-    print "CHECKING $userEnvElem\n";
-
-
-    # Get the requisites of the deriver.
-#    my $requisites = `nix-store --query --requisites --include-outputs '$deriver'`;
-#    die "cannot query requisites" if $? != 0;
-#    my @requisites = split ' ', $requisites;
-
-
-    # Get the hashes of the requisites.
-#    my $hashes = `nix-store --query --hash @requisites`;
-#    die "cannot query hashes" if $? != 0;
-#    my @hashes = split ' ', $hashes;
-#    for (my $i = 0; $i < scalar @requisites; $i++) {
-#        die unless $i < scalar @hashes;
-#        my $hash = $hashes[$i];
-#        $storePathHashes{$hash} = {} unless defined $storePathHashes{$hash};
-#        my $r = $storePathHashes{$hash}; # !!! fix
-#        $$r{$requisites[$i]} = 1;
-#    }
-
-
-    # Evaluate each blacklist item.
-    foreach my $item ($blacklist->getChildrenByTagName("item")) {
-        my $itemId = $item->getAttributeNode("id")->getValue;
-#        print "  CHECKING FOR $itemId\n";
-
-        my $condition = ($item->getChildrenByTagName("condition"))[0];
-        die unless $condition;
-
-        # Evaluate the condition.
-        my @elems = getElemNodes $condition;
-        if (evalOr({$deriver => 1}, \@elems)) {
-            # Oops, condition triggered.
-            my $reason = ($item->getChildrenByTagName("reason"))[0]->getChildNodes->to_literal;
-            $reason =~ s/\s+/ /g;
-            $reason =~ s/^\s+//g;
-
-            print "    VULNERABLE TO `$itemId': $reason\n";
-        }
-    }
-}
-

bootstrap.sh

@@ -1,8 +0,0 @@
-#! /bin/sh -e
-rm -f aclocal.m4
-mkdir -p config
-libtoolize --copy
-aclocal
-autoheader
-automake --add-missing --copy
-autoconf

configure.ac

@@ -1,102 +1,37 @@
-AC_INIT(nix, m4_esyscmd([echo -n $(cat ./version)$VERSION_SUFFIX]))
+AC_INIT(nix, "0.5")
 AC_CONFIG_SRCDIR(README)
 AC_CONFIG_AUX_DIR(config)
-AM_INIT_AUTOMAKE([dist-bzip2 foreign])
+AM_INIT_AUTOMAKE
 
-AC_DEFINE_UNQUOTED(NIX_VERSION, ["$VERSION"], [Nix version.])
+# Change to `1' to produce a `stable' release (i.e., the `preREVISION'
+# suffix is not added).
+STABLE=1
+
+# Put the revision number in the version.
+if test "$STABLE" != "1"; then
+    if REVISION=`test -d $srcdir/.svn && svnversion $srcdir 2> /dev/null`; then
+        VERSION="${VERSION}pre${REVISION}"
+    elif REVISION=`cat $srcdir/svn-revision 2> /dev/null`; then
+        VERSION="${VERSION}pre${REVISION}"
+    fi
+fi
+
+AC_PREFIX_DEFAULT(/nix)
 
 AC_CANONICAL_HOST
 
-
 # Construct a Nix system name (like "i686-linux").
 AC_MSG_CHECKING([for the canonical Nix system name])
-cpu_name=$(uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ ' 'abcdefghijklmnopqrstuvwxyz_')
-machine_name=$(uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ ' 'abcdefghijklmnopqrstuvwxyz_')
-
-case $machine_name in
-    i*86)
-        machine_name=i686
-        ;;
-    x86_64)
-        machine_name=x86_64
-        ;;
-    ppc)
-        machine_name=powerpc
-        ;;
-    *)
-        if test "$cpu_name" != "unknown"; then
-            machine_name=$cpu_name
-        fi
-        ;;
-esac
-
-sys_name=$(uname -s | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ ' 'abcdefghijklmnopqrstuvwxyz_')
-
-case $sys_name in
-    cygwin*)
-        sys_name=cygwin
-        ;;
-esac
-
-AC_ARG_WITH(system, AC_HELP_STRING([--with-system=SYSTEM],
-  [Platform identifier (e.g., `i686-linux').]),
-  system=$withval, system="${machine_name}-${sys_name}")
+machine_name=`uname -m`
+sys_name=`uname -s | tr [A-Z] [a-z]`
+system="${machine_name}-${sys_name}"
 AC_MSG_RESULT($system)
 AC_SUBST(system)
 AC_DEFINE_UNQUOTED(SYSTEM, ["$system"], [platform identifier (`cpu-os')])
 
-
-# State should be stored in /nix/var, unless the user overrides it explicitly.
-test "$localstatedir" = '${prefix}/var' && localstatedir=/nix/var
-
-
-# Windows-specific stuff.  On Cygwin, dynamically linking against the
-# ATerm DLL works, except that it requires the ATerm "lib" directory
-# to be in $PATH, as Windows doesn't have anything like an RPATH
-# embedded in executable.  Since this is kind of annoying, we use
-# static libraries for now.
-if test "$sys_name" = "cygwin"; then
-    AC_DISABLE_SHARED
-    AC_ENABLE_STATIC
-fi
-
-
-# Solaris-specific stuff.
-if test "$sys_name" = "sunos"; then
-    # Solaris requires -lsocket -lnsl for network functions
-    LIBS="-lsocket -lnsl $LIBS"
-fi
-
-
 AC_PROG_CC
 AC_PROG_CXX
-
-# To build programs to be run in the build machine
-if test "$CC_FOR_BUILD" = ""; then
-    if test "$cross_compiling" = "yes"; then
-        AC_CHECK_PROGS(CC_FOR_BUILD, gcc cc)
-    else
-        CC_FOR_BUILD="$CC"
-    fi
-fi
-AC_SUBST([CC_FOR_BUILD])
-
-# We are going to use libtool.
-AC_DISABLE_STATIC
-AC_ENABLE_SHARED
-AC_PROG_LIBTOOL
-
-if test "$enable_shared" = yes; then
-   SUB_CONFIGURE_FLAGS="--enable-shared --disable-static"
-else
-   SUB_CONFIGURE_FLAGS="--enable-static --disable-shared"
-fi
-AC_SUBST(SUB_CONFIGURE_FLAGS)
-
-
-# Use 64-bit file system calls so that we can support files > 2 GiB.
-AC_SYS_LARGEFILE
-
+AC_PROG_RANLIB
 
 # Check for pubsetbuf.
 AC_MSG_CHECKING([for pubsetbuf])
@@ -105,91 +40,42 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <iostream>
 using namespace std;
 static char buf[1024];]],
     [[cerr.rdbuf()->pubsetbuf(buf, sizeof(buf));]])],
-    [AC_MSG_RESULT(yes) AC_DEFINE(HAVE_PUBSETBUF, 1, [Whether pubsetbuf is available.])],
+    [AC_MSG_RESULT(yes) AC_DEFINE(HAVE_PUBSETBUF, 1, [whether pubsetbuf is available])],
     AC_MSG_RESULT(no))
 AC_LANG_POP(C++)
 
-
-# Check for chroot support (requires chroot() and bind mounts).
-AC_CHECK_FUNCS([chroot])
-AC_CHECK_FUNCS([unshare])
-AC_CHECK_HEADERS([sched.h], [], [], [])
-AC_CHECK_HEADERS([sys/param.h], [], [], [])
-AC_CHECK_HEADERS([sys/mount.h], [], [],
-[#ifdef HAVE_SYS_PARAM_H
-# include <sys/param.h>
-# endif
-])
-
-
-# Check for <locale>.
+# Check for <locale>
 AC_LANG_PUSH(C++)
-AC_CHECK_HEADERS([locale], [], [], [])
+AC_CHECK_HEADERS([locale])
 AC_LANG_POP(C++)
 
-
-# Check for <err.h>.
-AC_CHECK_HEADER([err.h], [], [bsddiff_compat_include="-Icompat-include"])
-AC_SUBST([bsddiff_compat_include])
-
-
-# Check whether we have the personality() syscall, which allows us to
-# do i686-linux builds on x86_64-linux machines.
-AC_CHECK_HEADERS([sys/personality.h])
-
-
-# Check for tr1/unordered_set.
-AC_LANG_PUSH(C++)
-AC_CHECK_HEADERS([tr1/unordered_set], [], [], [])
-AC_LANG_POP(C++)
-
-
 AC_DEFUN([NEED_PROG],
 [
 AC_PATH_PROG($1, $2)
 if test -z "$$1"; then
-    AC_MSG_ERROR([$2 is required])
+    AC_MSG_ERROR([$1 is required])
 fi
 ])
 
 NEED_PROG(curl, curl)
-NEED_PROG(bash, bash)
-NEED_PROG(patch, patch)
+NEED_PROG(bzip2, bzip2)
+NEED_PROG(bunzip2, bunzip2)
+NEED_PROG(shell, sh)
 AC_PATH_PROG(xmllint, xmllint, false)
 AC_PATH_PROG(xsltproc, xsltproc, false)
-AC_PATH_PROG(w3m, w3m, false)
 AC_PATH_PROG(flex, flex, false)
 AC_PATH_PROG(bison, bison, false)
 NEED_PROG(perl, perl)
-NEED_PROG(sed, sed)
-NEED_PROG(tar, tar)
-AC_PATH_PROG(dot, dot)
-AC_PATH_PROG(dblatex, dblatex)
-AC_PATH_PROG(gzip, gzip)
 
-AC_PATH_PROG(openssl_prog, openssl, openssl) # if not found, call openssl in $PATH
-AC_SUBST(openssl_prog)
-AC_DEFINE_UNQUOTED(OPENSSL_PATH, ["$openssl_prog"], [Path of the OpenSSL binary])
+AC_ARG_WITH(docbook-catalog, AC_HELP_STRING([--with-docbook-catalog=PATH],
+  [path of the DocBook XML DTD]),
+  docbookcatalog=$withval, docbookcatalog=/docbook-dtd-missing)
+AC_SUBST(docbookcatalog)
 
-# Test that Perl has the open/fork feature (Perl 5.8.0 and beyond).
-AC_MSG_CHECKING([whether Perl is recent enough])
-if ! $perl -e 'open(FOO, "-|", "true"); while (<FOO>) { print; }; close FOO or die;'; then
-    AC_MSG_RESULT(no)
-    AC_MSG_ERROR([Your Perl version is too old.  Nix requires Perl 5.8.0 or newer.])
-fi
-AC_MSG_RESULT(yes)
-
-NEED_PROG(cat, cat)
-NEED_PROG(tr, tr)
-AC_ARG_WITH(coreutils-bin, AC_HELP_STRING([--with-coreutils-bin=PATH],
-  [path of cat, mkdir, etc.]),
-  coreutils=$withval, coreutils=$(dirname $cat))
-AC_SUBST(coreutils)
-
-AC_ARG_WITH(docbook-rng, AC_HELP_STRING([--with-docbook-rng=PATH],
-  [path of the DocBook RelaxNG schema]),
-  docbookrng=$withval, docbookrng=/docbook-rng-missing)
-AC_SUBST(docbookrng)
+AC_ARG_WITH(docbook-ebnf-catalog, AC_HELP_STRING([--with-docbook-ebnf-catalog=PATH],
+  [path of the DocBook XML EBNF module DTD]),
+  docbookebnfcatalog=$withval, docbookcatalog=/docbook-ebnf-dtd-missing)
+AC_SUBST(docbookebnfcatalog)
 
 AC_ARG_WITH(docbook-xsl, AC_HELP_STRING([--with-docbook-xsl=PATH],
   [path of the DocBook XSL stylesheets]),
@@ -203,99 +89,44 @@ AC_SUBST(xmlflags)
 
 AC_ARG_WITH(store-dir, AC_HELP_STRING([--with-store-dir=PATH],
   [path of the Nix store]),
-  storedir=$withval, storedir='/nix/store')
+  storedir=$withval, storedir='${prefix}/store')
 AC_SUBST(storedir)
 
-AC_ARG_WITH(openssl, AC_HELP_STRING([--with-openssl=PATH],
-  [prefix of the OpenSSL library]),
-  openssl=$withval, openssl=)
-AM_CONDITIONAL(HAVE_OPENSSL, test -n "$openssl")
-if test -n "$openssl"; then
-  LDFLAGS="-L$openssl/lib -lcrypto $LDFLAGS"
-  CFLAGS="-I$openssl/include $CFLAGS"
-  CXXFLAGS="-I$openssl/include $CXXFLAGS"
-  AC_DEFINE(HAVE_OPENSSL, 1, [Whether to use OpenSSL.])
-fi
-
-AC_ARG_WITH(bzip2, AC_HELP_STRING([--with-bzip2=PATH],
-  [prefix of bzip2]),
-  bzip2=$withval, bzip2=)
-AM_CONDITIONAL(HAVE_BZIP2, test -n "$bzip2")
-ATERM_VERSION=2.5
-AC_SUBST(ATERM_VERSION)
-if test -z "$bzip2"; then
-  # Headers and libraries will be used from the temporary installation
-  # in externals/inst-bzip2.
-  bzip2_lib='-L${top_builddir}/externals/inst-bzip2/lib -lbz2'
-  bzip2_include='-I${top_builddir}/externals/inst-bzip2/include'
-  # The binary will be copied to $libexecdir.
-  bzip2_bin='${libexecdir}/nix'
-  # But for testing, we have to use the temporary copy :-(
-  bzip2_bin_test='${top_builddir}/externals/inst-bzip2/bin'
+AC_ARG_WITH(bdb, AC_HELP_STRING([--with-bdb=PATH],
+  [prefix of Berkeley DB]),
+  bdb=$withval, bdb=)
+AM_CONDITIONAL(HAVE_BDB, test -n "$bdb")
+if test -z "$bdb"; then
+  bdb_lib='-L${top_builddir}/externals/inst-bdb/lib -ldb_cxx'
+  bdb_include='-I${top_builddir}/externals/inst-bdb/include'
 else
-  bzip2_lib="-L$bzip2/lib -lbz2"
-  bzip2_include="-I$bzip2/include"
-  bzip2_bin="$bzip2/bin"
-  bzip2_bin_test="$bzip2/bin"
+  bdb_lib="-L$bdb/lib -Wl,-rpath,$bdb/lib -ldb_cxx"
+  bdb_include="-I$bdb/include"
 fi
-AC_SUBST(bzip2_lib)
-AC_SUBST(bzip2_include)
-AC_SUBST(bzip2_bin)
-AC_SUBST(bzip2_bin_test)
+AC_SUBST(bdb_lib)
+AC_SUBST(bdb_include)
 
-AC_ARG_WITH(sqlite, AC_HELP_STRING([--with-sqlite=PATH],
-  [prefix of SQLite]),
-  sqlite=$withval, sqlite=)
-AM_CONDITIONAL(HAVE_SQLITE, test -n "$sqlite")
-SQLITE_VERSION=3070500
-AC_SUBST(SQLITE_VERSION)
-if test -z "$sqlite"; then
-  sqlite_lib='${top_builddir}/externals/sqlite-autoconf-$(SQLITE_VERSION)/libsqlite3.la'
-  sqlite_include='-I${top_builddir}/externals/sqlite-autoconf-$(SQLITE_VERSION)'
-  sqlite_bin='${top_builddir}/externals/sqlite-autoconf-$(SQLITE_VERSION)'
+AC_ARG_WITH(aterm, AC_HELP_STRING([--with-aterm=PATH],
+  [prefix of CWI ATerm library]),
+  aterm=$withval, aterm=)
+AM_CONDITIONAL(HAVE_ATERM, test -n "$aterm")
+if test -z "$aterm"; then
+  aterm_lib='-L${top_builddir}/externals/inst-aterm/lib -lATerm'
+  aterm_include='-I${top_builddir}/externals/inst-aterm/include'
 else
-  sqlite_lib="-L$sqlite/lib -lsqlite3"
-  sqlite_include="-I$sqlite/include"
-  sqlite_bin="$sqlite/bin"
+  aterm_lib="-L$aterm/lib -Wl,-rpath,$aterm/lib -lATerm"
+  aterm_include="-I$aterm/include"
 fi
-AC_SUBST(sqlite_lib)
-AC_SUBST(sqlite_include)
-AC_SUBST(sqlite_bin)
-
-# Whether to use the Boehm garbage collector.
-AC_ARG_ENABLE(gc, AC_HELP_STRING([--enable-gc],
-  [enable garbage collection in the Nix expression evaluator (requires Boehm GC)]),
-  gc=$enableval, gc=)
-if test -n "$gc"; then
-  PKG_CHECK_MODULES([BDW_GC], [bdw-gc])
-  boehmgc_lib="-L$boehmgc/lib -lgc"
-  CXXFLAGS="$BDW_GC_CFLAGS $CXXFLAGS"
-  AC_DEFINE(HAVE_BOEHMGC, 1, [Whether to use the Boehm garbage collector.])
-fi
-AC_SUBST(boehmgc_lib)
+AC_SUBST(aterm_lib)
+AC_SUBST(aterm_include)
 
+AC_CHECK_LIB(pthread, pthread_mutex_init)
 
 AC_ARG_ENABLE(init-state, AC_HELP_STRING([--disable-init-state],
   [do not initialise DB etc. in `make install']),
   init_state=$enableval, init_state=yes)
 AM_CONDITIONAL(INIT_STATE, test "$init_state" = "yes")
 
-
-# Setuid installations.
-AC_CHECK_FUNCS([setresuid setreuid lchown])
-
-
-# Nice to have, but not essential.
-AC_CHECK_FUNCS([strsignal posix_fallocate nanosleep])
-
-
-# This is needed if ATerm or bzip2 are static libraries,
-# and the Nix libraries are dynamic.
-if test "$(uname)" = "Darwin"; then
-    LDFLAGS="-all_load $LDFLAGS"
-fi
-
-
 AM_CONFIG_HEADER([config.h])
 AC_CONFIG_FILES([Makefile
    externals/Makefile
@@ -311,19 +142,14 @@ AC_CONFIG_FILES([Makefile
    src/libexpr/Makefile
    src/nix-instantiate/Makefile
    src/nix-env/Makefile
-   src/nix-worker/Makefile
-   src/nix-setuid-helper/Makefile
-   src/nix-log2xml/Makefile
-   src/bsdiff-4.3/Makefile
+   src/log2xml/Makefile
    scripts/Makefile
    corepkgs/Makefile
+   corepkgs/fetchurl/Makefile
    corepkgs/nar/Makefile
    corepkgs/buildenv/Makefile
    corepkgs/channels/Makefile
    doc/Makefile
    doc/manual/Makefile
-   misc/Makefile
-   misc/emacs/Makefile
-   tests/Makefile
   ])
 AC_OUTPUT

corepkgs/Makefile.am

@@ -1 +1 @@
-SUBDIRS = nar buildenv channels
+SUBDIRS = fetchurl nar buildenv channels

corepkgs/buildenv/Makefile.am

@@ -3,7 +3,7 @@ all-local: builder.pl
 install-exec-local:
 	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs
 	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs/buildenv
-	$(INSTALL_DATA) $(srcdir)/default.nix $(DESTDIR)$(datadir)/nix/corepkgs/buildenv
+	$(INSTALL_DATA) default.nix $(DESTDIR)$(datadir)/nix/corepkgs/buildenv
 	$(INSTALL_PROGRAM) builder.pl $(DESTDIR)$(datadir)/nix/corepkgs/buildenv
 
 include ../../substitute.mk

corepkgs/buildenv/builder.pl.in

@@ -10,17 +10,11 @@ my $out = $ENV{"out"};
 mkdir "$out", 0755 || die "error creating $out";
 
 
-my $symlinks = 0;
-
-my %priorities;
-
-
 # For each activated package, create symlinks.
 
 sub createLinks {
     my $srcDir = shift;
     my $dstDir = shift;
-    my $priority = shift;
 
     my @srcFiles = glob("$srcDir/*");
 
@@ -28,23 +22,11 @@ sub createLinks {
         my $baseName = $srcFile;
         $baseName =~ s/^.*\///g; # strip directory
         my $dstFile = "$dstDir/$baseName";
-
-        # The files below are special-cased so that they don't show up
-        # in user profiles, either because they are useless, or
-        # because they would cause pointless collisions (e.g., each
-        # Python package brings its own
-        # `$out/lib/pythonX.Y/site-packages/easy-install.pth'.)
-        # Urgh, hacky...
-        if ($srcFile =~ /\/propagated-build-inputs$/ ||
-            $srcFile =~ /\/nix-support$/ ||
-            $srcFile =~ /\/perllocal.pod$/ ||
-            $srcFile =~ /\/easy-install.pth$/ ||
-            $srcFile =~ /\/site.py$/ ||
-            $srcFile =~ /\/site.pyc$/ ||
-            $srcFile =~ /\/info\/dir$/ ||
-            $srcFile =~ /\/log$/)
+        
+	if ($srcFile =~ /\/propagated-build-inputs$/ ||
+            $srcFile =~ /\/nix-support$/)
         {
-            # Do nothing.
+            # Do noting.
 	}
 
         elsif (-d $srcFile) {
@@ -52,7 +34,7 @@ sub createLinks {
             lstat $dstFile;
             
             if (-d _) {
-                createLinks($srcFile, $dstFile, $priority);
+                createLinks($srcFile, $dstFile);
             }
 
             elsif (-l _) {
@@ -63,109 +45,49 @@ sub createLinks {
                 unlink $dstFile or die "error unlinking `$dstFile': $!";
                 mkdir $dstFile, 0755 || 
                     die "error creating directory `$dstFile': $!";
-                createLinks($target, $dstFile, $priorities{$dstFile});
-                createLinks($srcFile, $dstFile, $priority);
+                createLinks($target, $dstFile);
+                createLinks($srcFile, $dstFile);
             }
 
             else {
                 symlink($srcFile, $dstFile) ||
                     die "error creating link `$dstFile': $!";
-                $priorities{$dstFile} = $priority;
-                $symlinks++;
             }
         }
 
-        else {
+        elsif (-l $dstFile) {
+            my $target = readlink $dstFile;
+            die "collission between `$srcFile' and `$target'";
+        }
 
-            if (-l $dstFile) {
-                my $target = readlink $dstFile;
-                my $prevPriority = $priorities{$dstFile};
-                die ( "Collission between `$srcFile' and `$target'. "
-                    . "Suggested solution: use `nix-env --set-flag "
-                    . "priority NUMBER PKGNAME' to change the priority of "
-                    . "one of the conflicting packages.\n" )
-                    if $prevPriority == $priority;
-                next if $prevPriority < $priority;
-                unlink $dstFile or die;
-            }
-            
+        else {
+#            print "linking $dstFile to $srcFile\n";
             symlink($srcFile, $dstFile) ||
                 die "error creating link `$dstFile': $!";
-            $priorities{$dstFile} = $priority;
-            $symlinks++;
         }
     }
 }
 
 
 my %done;
-my %postponed;
 
-sub addPkg;
 sub addPkg {
     my $pkgDir = shift;
-    my $priority = shift;
 
     return if (defined $done{$pkgDir});
     $done{$pkgDir} = 1;
 
-#    print "symlinking $pkgDir\n";
-    createLinks("$pkgDir", "$out", $priority);
-
-    my $propagatedFN = "$pkgDir/nix-support/propagated-user-env-packages";
-    if (-e $propagatedFN) {
-        open PROP, "<$propagatedFN" or die;
-        my $propagated = <PROP>;
-        close PROP;
-        my @propagated = split ' ', $propagated;
-        foreach my $p (@propagated) {
-            $postponed{$p} = 1 unless defined $done{$p};
-        }
-    }
+    createLinks("$pkgDir", "$out");
 }
 
 
-# Convert the stuff we get from the environment back into a coherent
-# data type.
-my @paths = split ' ', $ENV{"paths"};
-my @active = split ' ', $ENV{"active"};
-my @priority = split ' ', $ENV{"priority"};
+my @args = split ' ', $ENV{"derivations"};
 
-die if scalar @paths != scalar @active;
-die if scalar @paths != scalar @priority;
-
-my %pkgs;
-
-for (my $n = 0; $n < scalar @paths; $n++) {
-    $pkgs{$paths[$n]} =
-        { active => $active[$n]
-        , priority => $priority[$n] };
+while (scalar @args > 0) {
+    my $drvPath = shift @args;
+    print "adding $drvPath\n";
+    addPkg($drvPath);
 }
 
 
-# Symlink to the packages that have been installed explicitly by the
-# user.
-foreach my $pkg (sort (keys %pkgs)) {
-    #print $pkg, " ", $pkgs{$pkg}->{priority}, "\n";
-    addPkg($pkg, $pkgs{$pkg}->{priority}) if $pkgs{$pkg}->{active} ne "false";
-}
-
-
-# Symlink to the packages that have been "propagated" by packages
-# installed by the user (i.e., package X declares that it want Y
-# installed as well).  We do these later because they have a lower
-# priority in case of collisions.
-my $priorityCounter = 1000; # don't care about collisions
-while (scalar(keys %postponed) > 0) {
-    my @pkgDirs = keys %postponed;
-    %postponed = ();
-    foreach my $pkgDir (sort @pkgDirs) {
-        addPkg($pkgDir, $priorityCounter++);
-    }
-}
-
-
-print STDERR "created $symlinks symlinks in user environment\n";
-
-
-symlink($ENV{"manifest"}, "$out/manifest.nix") or die "cannot create manifest";
+symlink($ENV{"manifest"}, "$out/manifest") or die "cannot create manifest";

corepkgs/buildenv/default.nix

@@ -4,15 +4,6 @@ derivation {
   name = "user-environment";
   system = system;
   builder = ./builder.pl;
-  
+  derivations = derivations;
   manifest = manifest;
-
-  # !!! grmbl, need structured data for passing this in a clean way.
-  paths = derivations;
-  active = map (x: if x ? meta && x.meta ? active then x.meta.active else "true") derivations;
-  priority = map (x: if x ? meta && x.meta ? priority then x.meta.priority else "5") derivations;
-
-  # Building user environments remotely just causes huge amounts of
-  # network traffic, so don't do that.
-  preferLocalBuild = true;
 }

corepkgs/channels/Makefile.am

@@ -3,7 +3,7 @@ all-local: unpack.sh
 install-exec-local:
 	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs
 	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs/channels
-	$(INSTALL_DATA) $(srcdir)/unpack.nix $(DESTDIR)$(datadir)/nix/corepkgs/channels
+	$(INSTALL_DATA) unpack.nix $(DESTDIR)$(datadir)/nix/corepkgs/channels
 	$(INSTALL_PROGRAM) unpack.sh $(DESTDIR)$(datadir)/nix/corepkgs/channels
 
 include ../../substitute.mk

corepkgs/channels/unpack.sh.in

@@ -1,35 +1,24 @@
 #! @shell@ -e
 
-# Cygwin compatibility hack: bunzip2 expects cygwin.dll in $PATH.
-export PATH=@coreutils@
+export PATH=/bin:/usr/bin # !!! impure
 
-@coreutils@/mkdir $out
-@coreutils@/mkdir $out/tmp
+mkdir $out
+mkdir $out/tmp
 cd $out/tmp
 
-inputs=($inputs)
-for ((n = 0; n < ${#inputs[*]}; n += 2)); do
-    channelName=${inputs[n]}
-    channelTarball=${inputs[n+1]}
-    
-    echo "unpacking channel $channelName"
-    
-    @bunzip2@ < $channelTarball | @tar@ xf -
+expr=$out/default.nix
+echo '[' > $expr
 
-    if test -e */channel-name; then
-        channelName="$(@coreutils@/cat */channel-name)"
-    fi
-
-    nr=1
-    attrName=$(echo $channelName | @tr@ -- '- ' '__')
-    dirName=$attrName
-    while test -e ../$dirName; do
-        nr=$((nr+1))
-        dirName=$attrName-$nr
-    done
-
-    @coreutils@/mv * ../$dirName # !!! hacky
+nr=0
+for i in $inputs; do
+    echo "unpacking $i"
+    @bunzip2@ < $i | tar xvf -
+    mv * ../$nr # !!! hacky
+    echo "(import ./$nr)" >> $expr
+    nr=$(($nr + 1))
 done
 
+echo ']' >> $expr
+
 cd ..
-@coreutils@/rmdir tmp
+rmdir tmp

corepkgs/fetchurl/Makefile.am

@@ -0,0 +1,11 @@
+all-local: builder.sh
+
+install-exec-local:
+	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs
+	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs/fetchurl
+	$(INSTALL_DATA) default.nix $(DESTDIR)$(datadir)/nix/corepkgs/fetchurl
+	$(INSTALL_PROGRAM) builder.sh $(DESTDIR)$(datadir)/nix/corepkgs/fetchurl
+
+include ../../substitute.mk
+
+EXTRA_DIST = default.nix builder.sh.in

corepkgs/fetchurl/builder.sh.in

@@ -0,0 +1,19 @@
+#! @shell@ -e
+
+export PATH=/bin:/usr/bin
+
+echo "downloading $url into $out"
+
+prefetch=@storedir@/nix-prefetch-url-$md5
+if test -f "$prefetch"; then
+    echo "using prefetched $prefetch";
+    mv $prefetch $out
+else
+    @curl@ --fail --location --max-redirs 20 "$url" > "$out"
+fi
+
+actual=$(@bindir@/nix-hash --flat $out)
+if test "$actual" != "$md5"; then
+    echo "hash is $actual, expected $md5"
+    exit 1
+fi

corepkgs/fetchurl/default.nix

@@ -0,0 +1,8 @@
+{system, url, md5}:
+
+derivation {
+  name = baseNameOf (toString url);
+  builder = ./builder.sh;
+  id = md5;
+  inherit system url md5;
+}

corepkgs/nar/Makefile.am

@@ -1,11 +1,13 @@
-all-local: nar.sh
+all-local: nar.sh unnar.sh
 
 install-exec-local:
 	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs
 	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/corepkgs/nar
-	$(INSTALL_DATA) $(srcdir)/nar.nix $(DESTDIR)$(datadir)/nix/corepkgs/nar
+	$(INSTALL_DATA) nar.nix $(DESTDIR)$(datadir)/nix/corepkgs/nar
 	$(INSTALL_PROGRAM) nar.sh $(DESTDIR)$(datadir)/nix/corepkgs/nar
+	$(INSTALL_DATA) unnar.nix $(DESTDIR)$(datadir)/nix/corepkgs/nar
+	$(INSTALL_PROGRAM) unnar.sh $(DESTDIR)$(datadir)/nix/corepkgs/nar
 
 include ../../substitute.mk
 
-EXTRA_DIST = nar.nix nar.sh.in
+EXTRA_DIST = nar.nix nar.sh.in unnar.nix unnar.sh.in

corepkgs/nar/nar.nix

@@ -1,7 +1,6 @@
-{system, storePath, hashAlgo}: 
-
-derivation {
+{system, path}: derivation {
   name = "nar";
   builder = ./nar.sh;
-  inherit system storePath hashAlgo;
+  system = system;
+  path = path;
 }

corepkgs/nar/nar.sh.in

@@ -1,12 +1,13 @@
 #! @shell@ -e
 
-echo "packing $storePath into $out..."
-@coreutils@/mkdir $out
-dst=$out/tmp.nar.bz2
-@bindir@/nix-store --dump "$storePath" > tmp
+# !!! impure; fix this
+export PATH=/bin:/usr/bin
 
-@bzip2@ < tmp > $dst
+echo "packing $path into $out..."
+mkdir $out
+dst=$out/$(basename $path).nar.bz2
+@bindir@/nix-store --dump "$path" | @bzip2@ > $dst
 
-@bindir@/nix-hash --flat --type $hashAlgo --base32 $dst > $out/narbz2-hash
-
-@coreutils@/mv $out/tmp.nar.bz2 $out/$(@coreutils@/cat $out/narbz2-hash).nar.bz2
+md5=$(md5sum -b $dst | cut -c1-32)
+if test $? != 0; then exit 1; fi
+echo $md5 > $out/md5

corepkgs/nar/unnar.nix

@@ -0,0 +1,7 @@
+{system, narFile, outPath}: derivation {
+  name = "unnar";
+  builder = ./unnar.sh;
+  system = system;
+  narFile = narFile;
+  outPath = outPath;
+}

corepkgs/nar/unnar.sh.in

@@ -0,0 +1,4 @@
+#! @shell@ -e
+
+echo "unpacking $narFile to $out..."
+@bunzip2@ < $narFile | @bindir@/nix-store --restore "$out"

doc/dev/release-procedures.txt

@@ -1,8 +1,5 @@
 To produce a `stable' release from the trunk:
 
--1. Update the release notes; make sure that the release date is
-    correct.
-
 0. Make sure that the trunk builds in the release supervisor.
 
 1. Branch the trunk, e.g., `svn cp .../trunk
@@ -25,8 +22,8 @@ To produce a `stable' release from the trunk:
    branch (e.g., `.../branches/0.5') should be created from the
    original revision of the trunk (since maintenance releases should
    also be tested first; hence, we cannot have `STABLE=1').  The same
-   procedure can then be followed to produce maintenance releases;
-   just substitute `.../branches/VERSION' for the trunk.
+   procedure can then be followed to produce maintenance release; just
+   substitute `.../branches/VERSION' for the trunk.
 
 7. Switch back to the trunk.
 

doc/manual/Makefile.am

@@ -1,103 +1,50 @@
-XMLLINT = $(xmllint) $(xmlflags)
-XSLTPROC = $(xsltproc) $(xmlflags) \
+ENV = SGML_CATALOG_FILES=$(docbookcatalog):$(docbookebnfcatalog)
+
+XMLLINT = $(ENV) $(xmllint) $(xmlflags) --catalogs
+XSLTPROC = $(ENV) $(xsltproc) $(xmlflags) --catalogs \
  --param section.autolabel 1 \
  --param section.label.includes.component.label 1 \
- --param html.stylesheet \'style.css\' \
- --param xref.with.number.and.title 1 \
- --param toc.section.depth 3 \
- --param admon.style \'\' \
- --param callout.graphics.extension \'.gif\' \
- --param contrib.inline.enabled 0
+ --param html.stylesheet \'style.css\'
 
-dblatex_opts = \
- -P doc.collab.show=0 \
- -P latex.output.revhistory=0
-
-# Note: we use GIF for now, since the PNGs shipped with Docbook aren't
-# transparent.
-
-man1_MANS = nix-env.1 nix-build.1 nix-store.1 nix-instantiate.1 \
+man1_MANS = nix-env.1 nix-store.1 nix-instantiate.1 \
  nix-collect-garbage.1 nix-push.1 nix-pull.1 \
- nix-prefetch-url.1 nix-channel.1 \
- nix-install-package.1 nix-hash.1 nix-copy-closure.1
+ nix-prefetch-url.1
 
-man8_MANS = nix-worker.8
-
-FIGURES = figures/user-environments.png
-
-MANUAL_SRCS = manual.xml introduction.xml installation.xml \
- package-management.xml writing-nix-expressions.xml builtins.xml \
- build-farm.xml \
- $(man1_MANS:.1=.xml) $(man8_MANS:.8=.xml) \
+SOURCES = manual.xml introduction.xml installation.xml overview.xml \
+ $(man1_MANS:.1=.xml) \
  troubleshooting.xml bugs.xml opt-common.xml opt-common-syn.xml \
- env-common.xml quick-start.xml nix-lang-ref.xml glossary.xml \
- conf-file.xml release-notes.xml \
- style.css images
+ quick-start.xml nix-lang-ref.xml style.css images
 
-# Note: RelaxNG validation requires xmllint >= 2.7.4.
-manual.is-valid: $(MANUAL_SRCS) version.txt
-	$(XMLLINT) --noout --nonet --xinclude --noxincludenode --relaxng $(docbookrng)/docbook.rng $<
+manual.is-valid: $(SOURCES) version.xml
+	$(XMLLINT) --noout --valid manual.xml
 	touch $@
 
-version.txt:
-	echo -n $(VERSION) > version.txt
+version.xml:
+	echo -n $(VERSION) > version.xml
 
-man $(MANS): $(MANUAL_SRCS) manual.is-valid
-	$(XSLTPROC) --nonet --xinclude $(docbookxsl)/manpages/docbook.xsl manual.xml
+man $(MANS): $(SOURCES) manual.is-valid
+	$(XSLTPROC) $(docbookxsl)/manpages/docbook.xsl manual.xml
 
-manual.html: $(MANUAL_SRCS) manual.is-valid images
-	$(XSLTPROC) --nonet --xinclude --output manual.html \
-	  $(docbookxsl)/html/docbook.xsl manual.xml
+manual.html: $(SOURCES) manual.is-valid images
+	$(XSLTPROC) --output manual.html $(docbookxsl)/html/docbook.xsl manual.xml
 
-manual.pdf: $(MANUAL_SRCS) manual.is-valid images
-	if test "$(dblatex)" != ""; then \
-		$(dblatex) $(dblatex_opts) manual.xml; \
-	else \
-		echo "Please install dblatex and rerun configure."; \
-		exit 1; \
-	fi
-
-
-NEWS_OPTS = \
- --stringparam generate.toc "article nop" \
- --stringparam section.autolabel.max.depth 0 \
- --stringparam header.rule 0
-
-NEWS.html: release-notes.xml
-	$(XSLTPROC) --nonet --xinclude --output $@ $(NEWS_OPTS) \
-	  $(docbookxsl)/html/docbook.xsl release-notes.xml
-
-NEWS.txt: release-notes.xml
-	$(XSLTPROC) --nonet --xinclude quote-literals.xsl release-notes.xml | \
-	  $(XSLTPROC) --nonet --output $@.tmp.html $(NEWS_OPTS) \
-	  $(docbookxsl)/html/docbook.xsl -
-	LANG=en_US $(w3m) -dump $@.tmp.html > $@
-	rm $@.tmp.html
-
-
-all-local: manual.html NEWS.html NEWS.txt
+all-local: manual.html
 
 install-data-local: manual.html
-	$(INSTALL) -d $(DESTDIR)$(docdir)/manual
-	$(INSTALL_DATA) manual.html $(DESTDIR)$(docdir)/manual
-	ln -sf manual.html $(DESTDIR)$(docdir)/manual/index.html
-	$(INSTALL_DATA) style.css $(DESTDIR)$(docdir)/manual
-	cp -r images $(DESTDIR)$(docdir)/manual/images
-	$(INSTALL) -d $(DESTDIR)$(docdir)/manual/figures
-	$(INSTALL_DATA) $(FIGURES) $(DESTDIR)$(docdir)/manual/figures
-	$(INSTALL) -d $(DESTDIR)$(docdir)/release-notes
-	$(INSTALL_DATA) NEWS.html $(DESTDIR)$(docdir)/release-notes/index.html
-	$(INSTALL_DATA) style.css $(DESTDIR)$(docdir)/release-notes/
+	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/manual
+	$(INSTALL_DATA) manual.html $(DESTDIR)$(datadir)/nix/manual
+	$(INSTALL_DATA) style.css $(DESTDIR)$(datadir)/nix/manual
+	cp -r images $(DESTDIR)$(datadir)/nix/manual/images
 
 images:
 	mkdir images
-#	cp $(docbookxsl)/images/*.gif images
+	cp $(docbookxsl)/images/*.png images
 	mkdir images/callouts
-	cp $(docbookxsl)/images/callouts/*.gif images/callouts
-	chmod -R +w images
+	cp $(docbookxsl)/images/callouts/*.png images/callouts
+	chmod +w -R images
 
-KEEP = manual.html manual.is-valid version.txt $(MANS) NEWS.html NEWS.txt
+KEEP = manual.html manual.is-valid version.xml $(MANS)
 
-EXTRA_DIST = $(MANUAL_SRCS) $(FIGURES) $(KEEP)
+EXTRA_DIST = $(SOURCES) $(KEEP)
 
 DISTCLEANFILES = $(KEEP)

doc/manual/bugs.xml

@@ -1,39 +1,115 @@
-<appendix xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink">
+<appendix>
+  <title>Bugs / To-Do</title>
 
-<title>Bugs / To-Do</title>
+  <itemizedlist>
 
+    <listitem>
+      <para>
+        The man-pages generated from the DocBook documentation are ugly.
+      </para>
+    </listitem>
 
-<itemizedlist>
+    <listitem>
+      <para>
+        Generations properly form a tree.  E.g., if after switching to
+        generation 39, we perform an installation action, a generation
+        43 is created which is a descendant of 39, not 42.  So a
+        rollback from 43 ought to go back to 39.  This is not
+        currently implemented; generations form a linear sequence.
+      </para>
+    </listitem>
 
-<listitem><para>The man-pages generated from the DocBook documentation
-are ugly.</para></listitem>
+    <listitem>
+      <para>
+        Unify the concepts of successors and substitutes into a
+        general notion of <emphasis>equivalent expressions</emphasis>.
+        Expressions are equivalent if they have the same target paths
+        with the same identifiers.  However, even though they are
+        functionally equivalent, they may differ stronly with respect
+        to their <emphasis>performance characteristics</emphasis>.
+        For example, realising a closure expression is more efficient
+        that realising the derivation expression from which it was
+        produced.  On the other hand, distributing sources may be more
+        efficient (storage- or bandwidth-wise) than distributing
+        binaries.  So we need to be able to attach weigths or
+        priorities or performance annotations to expressions; Nix can
+        then choose the most efficient expression dependent on the
+        context.
+      </para>
+    </listitem>
 
-<listitem><para>Generations properly form a tree.  E.g., if after
-switching to generation 39, we perform an installation action, a
-generation 43 is created which is a descendant of 39, not 42.  So a
-rollback from 43 ought to go back to 39.  This is not currently
-implemented; generations form a linear sequence.</para></listitem>
+    <listitem>
+      <para>
+        <emphasis>Build management.</emphasis>  In principle it is already
+        possible to do build management using Nix (by writing builders that
+        perform appropriate build steps), but the Nix expression language is
+        not yet powerful enough to make this pleasant (?).  The language should
+        be extended with features from the <ulink
+          url='http://www.cs.uu.nl/~eelco/maak/'>Maak build manager</ulink>.
+        Another interesting idea is to write a <command>make</command>
+        implementation that uses Nix as a back-end to support <ulink
+          url='http://www.research.att.com/~bs/bs_faq.html#legacy'>legacy</ulink> 
+        build files.
+      </para>
+    </listitem>
 
-<listitem><para>For security, <command>nix-push</command> manifests
-should be digitally signed, and <command>nix-pull</command> should
-verify the signatures.  The actual NAR archives in the cache do not
-need to be signed, since the manifest contains cryptographic hashes of
-these files (and <filename>fetchurl.nix</filename> checks
-them).</para></listitem>
+    <listitem>
+      <para>
+        The current garbage collector is a hack.  It should be
+        integrated into <command>nix-store</command>.  It should
+        delete derivations in an order determined by topologically
+        sorting derivations under the points-to relation.  This
+        ensures that no store paths ever exist that point to
+        non-existant store paths.
+      </para>
+    </listitem>
 
-<listitem><para>It would be useful to have an option in
-<command>nix-env --delete-generations</command> to remove non-current
-generations older than a certain age.</para></listitem>
+    <listitem>
+      <para>
+        There are race conditions between the garbage collector and
+        other Nix tools.  For instance, when we run
+        <command>nix-env</command> to build and install a derivation
+        and run the garbage collector at the same time, the garbage
+        collector may kick in exactly between the build and
+        installation steps, i.e., before the newly built derivation
+        has become reachable from a root of the garbage collector.
+      </para>
 
-<listitem><para>There should be a flexible way to change the user
-environment builder.  Currently, you have to replace
-<filename><replaceable>prefix</replaceable>/share/nix/corepkgs/buildenv/builder.pl</filename>,
-which is hard-coded into <command>nix-env</command>.  Also, the
-default builder should be more powerful.  For instance, there should
-be some way to specify priorities to resolve
-collisions.</para></listitem>
+      <para>
+        One solution would be for these programs to properly register
+        temporary roots for the collector.  Another would be to use
+        stop-the-world garbage collection: if any tool is running, the
+        garbage collector blocks, and vice versa.  These solutions do
+        not solve the situation where multiple tools are involved,
+        e.g.,
 
-</itemizedlist>
+        <screen>
+$ nix-store -r $(nix-instantiate foo.nix)</screen>
+
+        since even if <command>nix-instantiate</command> where to
+        register a temporary root, it would be released by the time
+        <command>nix-store</command> is started.  A solution would be
+        to write the intermediate value to a file that is used as a
+        root to the collector, e.g.,
+        
+        <screen>
+$ nix-instantiate foo.nix > /nix/var/nix/roots/bla
+$ nix-store -r $(cat /nix/var/nix/roots/bla)</screen>
+
+      </para>
+    </listitem>
+
+    <listitem>
+      <para>
+        For security, <command>nix-push</command> manifests should be
+        digitally signed, and <command>nix-pull</command> should
+        verify the signatures.  The actual NAR archives in the cache
+        do not need to be signed, since the manifest contains
+        cryptographic hashes of these files (and
+        <filename>fetchurl.nix</filename> checks them).
+      </para>
+    </listitem>
+
+  </itemizedlist>
 
 </appendix>

doc/manual/build-farm.xml

@@ -1,137 +0,0 @@
-<chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id='chap-build-farm'>
-
-<title>Setting up a Build Farm</title>
-
-
-<para>This chapter provides some sketchy information on how to set up
-a Nix-based build farm.  Nix is particularly suited as a basis for a
-build farm, since:
-
-<itemizedlist>
-
-  <listitem><para>Nix supports distributed builds: a local Nix
-  installation can forward Nix builds to other machines over the
-  network.  This allows multiple builds to be performed in parallel
-  (thus improving performance), but more in importantly, it allows Nix
-  to perform multi-platform builds in a semi-transparent way.  For
-  instance, if you perform a build for a
-  <literal>powerpc-darwin</literal> on an
-  <literal>i686-linux</literal> machine, Nix can automatically forward
-  the build to a <literal>powerpc-darwin</literal> machine, if
-  available.</para></listitem>
-
-  <listitem><para>The Nix expression language is ideal for describing
-  build jobs, plus all their dependencies.  For instance, if your
-  package has some dependency, you don't have to manually install it
-  on all the machines in the build farm; they will be built
-  automatically.</para></listitem>
-
-  <listitem><para>Proper release management requires that builds (if
-  deployed) are traceable: it should be possible to figure out from
-  exactly what sources they were built, in what configuration, etc.;
-  and it should be possible to reproduce the build, if necessary.  Nix
-  makes this possible since Nix's hashing scheme uniquely identifies
-  builds, and Nix expressions are self-contained.</para></listitem>
-
-  <listitem><para>Nix will only rebuild things that have actually
-  changed.  For instance, if the sources of a package haven't changed
-  between runs of the build farm, the package won't be rebuilt (unless
-  it was garbage-collected).  Also, dependencies typically don't
-  change very often, so they only need to be built
-  once.</para></listitem>
-
-  <listitem><para>The results of a Nix build farm can be made
-  available through a channel, so successful builds can be deployed to
-  users immediately.</para></listitem>
-
-</itemizedlist>
-
-</para>
-
-
-<section><title>Overview</title>
-
-<para>TODO</para>
-
-<para>The sources of the Nix build farm are at <link
-xlink:href='https://svn.nixos.org/repos/nix/release/trunk'/>.</para>
-
-</section>
-
-
-<section xml:id='sec-distributed-builds'><title>Setting up distributed builds</title>
-
-<para>You can enable distributed builds by setting the environment
-variable <envar>NIX_BUILD_HOOK</envar> to point to a program that Nix
-will call whenever it wants to build a derivation.  The build hook
-(typically a shell or Perl script) can decline the build, in which Nix
-will perform it in the usual way if possible, or it can accept it, in
-which case it is responsible for somehow getting the inputs of the
-build to another machine, doing the build there, and getting the
-results back.  The details of the build hook protocol are described in
-the documentation of the <link
-linkend="envar-build-hook"><envar>NIX_BUILD_HOOK</envar>
-variable</link>.</para>
-
-<example xml:id='ex-remote-systems'><title>Remote machine configuration:
-<filename>remote-systems.conf</filename></title>
-<programlisting>
-nix@mcflurry.labs.cs.uu.nl  powerpc-darwin  /home/nix/.ssh/id_quarterpounder_auto  2
-nix@scratchy.labs.cs.uu.nl  i686-linux      /home/nix/.ssh/id_scratchy_auto        1
-</programlisting>
-</example>
-
-<para>An example build hook can be found in the Nix build farm
-sources: <link
-xlink:href='https://svn.nixos.org/repos/nix/release/trunk/common/distributed/build-remote.pl'
-/>.  It should be suitable for most purposes, with maybe some minor
-adjustments.  It uses <command>ssh</command> and
-<command>rsync</command> to copy the build inputs and outputs and
-perform the remote build.  You should define a list of available build
-machines and set the environment variable
-<envar>REMOTE_SYSTEMS</envar> to point to it.  An example
-configuration is shown in <xref linkend='ex-remote-systems' />.  Each
-line in the file specifies a machine, with the following bits of
-information:
-
-<orderedlist>
-  
-  <listitem><para>The name of the remote machine, with optionally the
-  user under which the remote build should be performed.  This is
-  actually passed as an argument to <command>ssh</command>, so it can
-  be an alias defined in your
-  <filename>~/.ssh/config</filename>.</para></listitem>
-
-  <listitem><para>The Nix platform type identifier, such as
-  <literal>powerpc-darwin</literal>.</para></listitem>
-
-  <listitem><para>The SSH private key to be used to log in to the
-  remote machine.  Since builds should be non-interactive, this key
-  should not have a passphrase!</para></listitem>
-
-  <listitem><para>The maximum <quote>load</quote> of the remote
-  machine.  This is just the maximum number of jobs that
-  <filename>build-remote.pl</filename> will execute in parallel on the
-  machine.  Typically this should be equal to the number of
-  CPUs.</para></listitem>
-
-</orderedlist>
-
-You should also set up the environment variable
-<envar>CURRENT_LOAD</envar> to point at a file that
-<filename>build-remote.pl</filename> uses to remember how many jobs it
-is currently executing remotely.  It doesn't look at the actual load
-on the remote machine, so if you have multiple instances of Nix
-running, they should use the same <envar>CURRENT_LOAD</envar>
-file<footnote><para>Although there are probably some race conditions
-in the script right now.</para></footnote>.  Maybe in the future
-<filename>build-remote.pl</filename> will look at the actual remote
-load.  The load file should exist, so you should just create it as an
-empty file initially.</para>
-  
-</section>
-
-
-</chapter>

doc/manual/builtins.xml

@@ -1,851 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id='ssec-builtins'>
-
-<title>Built-in functions</title>
-
-
-<para>This section lists the functions and constants built into the
-Nix expression evaluator.  (The built-in function
-<function>derivation</function> is discussed above.)  Some built-ins,
-such as <function>derivation</function>, are always in scope of every
-Nix expression; you can just access them right away.  But to prevent
-polluting the namespace too much, most built-ins are not in scope.
-Instead, you can access them through the <varname>builtins</varname>
-built-in value, which is an attribute set that contains all built-in
-functions and values.  For instance, <function>derivation</function>
-is also available as <function>builtins.derivation</function>.</para>
-
-
-<variablelist>
-
-  
-  <varlistentry><term><function>abort</function> <replaceable>s</replaceable></term>
-
-    <listitem><para>Abort Nix expression evaluation, print error
-    message <replaceable>s</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.add</function>
-  <replaceable>e1</replaceable> <replaceable>e2</replaceable></term>
-
-    <listitem><para>Return the sum of the integers
-    <replaceable>e1</replaceable> and
-    <replaceable>e2</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.attrNames</function>
-  <replaceable>attrs</replaceable></term>
-
-    <listitem><para>Return the names of the attributes in the
-    attribute set <replaceable>attrs</replaceable> in a sorted list.
-    For instance, <literal>builtins.attrNames {y = 1; x =
-    "foo";}</literal> evaluates to <literal>["x" "y"]</literal>.
-    There is no built-in function <function>attrValues</function>, but
-    you can easily define it yourself:
-
-<programlisting>
-attrValues = attrs: map (name: builtins.getAttr name attrs) (builtins.attrNames attrs);</programlisting>
-
-    </para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>baseNameOf</function> <replaceable>s</replaceable></term>
-
-    <listitem><para>Return the <emphasis>base name</emphasis> of the
-    string <replaceable>s</replaceable>, that is, everything following
-    the final slash in the string.  This is similar to the GNU
-    <command>basename</command> command.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><varname>builtins</varname></term>
-
-    <listitem><para>The attribute set <varname>builtins</varname>
-    contains all the built-in functions and values.  You can use
-    <varname>builtins</varname> to test for the availability of
-    features in the Nix installation, e.g.,
-
-<programlisting>
-if builtins ? getEnv then builtins.getEnv "PATH" else ""</programlisting>
-
-    This allows a Nix expression to fall back gracefully on older Nix
-    installations that don’t have the desired built-in
-    function.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.compareVersions</function>
-  <replaceable>s1</replaceable> <replaceable>s2</replaceable></term>
-
-    <listitem><para>Compare two strings representing versions and
-    return <literal>-1</literal> if version
-    <replaceable>s1</replaceable> is older than version
-    <replaceable>s2</replaceable>, <literal>0</literal> if they are
-    the same, and <literal>1</literal> if
-    <replaceable>s1</replaceable> is newer than
-    <replaceable>s2</replaceable>.  The version comparison algorithm
-    is the same as the one used by <link
-    linkend="ssec-version-comparisons"><command>nix-env
-    -u</command></link>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry
-  xml:id='builtin-currentSystem'><term><varname>builtins.currentSystem</varname></term>
-
-    <listitem><para>The built-in value <varname>currentSystem</varname>
-    evaluates to the Nix platform identifier for the Nix installation
-    on which the expression is being evaluated, such as
-    <literal>"i686-linux"</literal> or
-    <literal>"powerpc-darwin"</literal>.</para></listitem>
-
-  </varlistentry>
-
-
-  <!--
-  <varlistentry><term><function>currentTime</function></term>
-
-    <listitem><para>The built-in value <varname>currentTime</varname>
-    returns the current system time in seconds since 00:00:00 1/1/1970
-    UTC.  Due to the evaluation model of Nix expressions
-    (<emphasis>maximal laziness</emphasis>), it always yields the same
-    value within an execution of Nix.</para></listitem>
-
-  </varlistentry>
-  -->
-
-  
-  <!--
-  <varlistentry><term><function>dependencyClosure</function></term>
-
-    <listitem><para>TODO</para></listitem>
-
-  </varlistentry>
-  -->
-
-  
-  <varlistentry><term><function>derivation</function>
-  <replaceable>attrs</replaceable></term>
-
-    <listitem><para><function>derivation</function> is described in
-    <xref linkend='ssec-derivation' />.</para></listitem>
-
-  </varlistentry>
-
-
-  <varlistentry><term><function>dirOf</function> <replaceable>s</replaceable></term>
-
-    <listitem><para>Return the directory part of the string
-    <replaceable>s</replaceable>, that is, everything before the final
-    slash in the string.  This is similar to the GNU
-    <command>dirname</command> command.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.div</function>
-  <replaceable>e1</replaceable> <replaceable>e2</replaceable></term>
-
-    <listitem><para>Return the quotient of the integers
-    <replaceable>e1</replaceable> and
-    <replaceable>e2</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.filterSource</function>
-  <replaceable>e1</replaceable> <replaceable>e2</replaceable></term>
-
-    <listitem>
-
-      <para>This function allows you to copy sources into the Nix
-      store while filtering certain files.  For instance, suppose that
-      you want to use the directory <filename>source-dir</filename> as
-      an input to a Nix expression, e.g.
-
-<programlisting>
-stdenv.mkDerivation {
-  ...
-  src = ./source-dir;
-}
-</programlisting>
-
-      However, if <filename>source-dir</filename> is a Subversion
-      working copy, then all those annoying <filename>.svn</filename>
-      subdirectories will also be copied to the store.  Worse, the
-      contents of those directories may change a lot, causing lots of
-      spurious rebuilds.  With <function>filterSource</function> you
-      can filter out the <filename>.svn</filename> directories:
-
-<programlisting>
-  src = builtins.filterSource
-    (path: type: type != "directory" || baseNameOf path != ".svn")
-    ./source-dir;
-</programlisting>
-
-      </para>
-
-      <para>Thus, the first argument <replaceable>e1</replaceable>
-      must be a predicate function that is called for each regular
-      file, directory or symlink in the source tree
-      <replaceable>e2</replaceable>.  If the function returns
-      <literal>true</literal>, the file is copied to the Nix store,
-      otherwise it is omitted.  The function is called with two
-      arguments.  The first is the full path of the file.  The second
-      is a string that identifies the type of the file, which is
-      either <literal>"regular"</literal>,
-      <literal>"directory"</literal>, <literal>"symlink"</literal> or
-      <literal>"unknown"</literal> (for other kinds of files such as
-      device nodes or fifos — but note that those cannot be copied to
-      the Nix store, so if the predicate returns
-      <literal>true</literal> for them, the copy will fail).</para>
-
-    </listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.getAttr</function>
-  <replaceable>s</replaceable> <replaceable>attrs</replaceable></term>
-
-    <listitem><para><function>getAttr</function> returns the attribute
-    named <replaceable>s</replaceable> from the attribute set
-    <replaceable>attrs</replaceable>.  Evaluation aborts if the
-    attribute doesn’t exist.  This is a dynamic version of the
-    <literal>.</literal> operator, since <replaceable>s</replaceable>
-    is an expression rather than an identifier.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.getEnv</function>
-  <replaceable>s</replaceable></term>
-
-    <listitem><para><function>getEnv</function> returns the value of
-    the environment variable <replaceable>s</replaceable>, or an empty
-    string if the variable doesn’t exist.  This function should be
-    used with care, as it can introduce all sorts of nasty environment
-    dependencies in your Nix expression.</para>
-
-    <para><function>getEnv</function> is used in Nix Packages to
-    locate the file <filename>~/.nixpkgs/config.nix</filename>, which
-    contains user-local settings for Nix Packages.  (That is, it does
-    a <literal>getEnv "HOME"</literal> to locate the user’s home
-    directory.)</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.hasAttr</function>
-  <replaceable>s</replaceable> <replaceable>attrs</replaceable></term>
-
-    <listitem><para><function>hasAttr</function> returns
-    <literal>true</literal> if the attribute set
-    <replaceable>attrs</replaceable> has an attribute named
-    <replaceable>s</replaceable>, and <literal>false</literal>
-    otherwise.  This is a dynamic version of the <literal>?</literal>
-    operator, since <replaceable>s</replaceable> is an expression
-    rather than an identifier.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.head</function>
-  <replaceable>list</replaceable></term>
-
-    <listitem><para>Return the first element of a list; abort
-    evaluation if the argument isn’t a list or is an empty list.  You
-    can test whether a list is empty by comparing it with
-    <literal>[]</literal>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>import</function>
-  <replaceable>path</replaceable></term>
-
-    <listitem><para>Load, parse and return the Nix expression in the
-    file <replaceable>path</replaceable>.  Evaluation aborts if the
-    file doesn’t exist or contains an incorrect Nix
-    expression.  <function>import</function> implements Nix’s module
-    system: you can put any Nix expression (such as an attribute set
-    or a function) in a separate file, and use it from Nix expressions
-    in other files.</para>
-
-    <para>A Nix expression loaded by <function>import</function> must
-    not contain any <emphasis>free variables</emphasis> (identifiers
-    that are not defined in the Nix expression itself and are not
-    built-in).  Therefore, it cannot refer to variables that are in
-    scope at the call site.  For instance, if you have a calling
-    expression
-    
-<programlisting>
-rec {
-  x = 123;
-  y = import ./foo.nix;
-}</programlisting>
-
-    then the following <filename>foo.nix</filename> will give an
-    error:
-
-<programlisting>
-x + 456</programlisting>
-
-    since <varname>x</varname> is not in scope in
-    <filename>foo.nix</filename>.  If you want <varname>x</varname>
-    to be available in <filename>foo.nix</filename>, you should pass
-    it as a function argument:
-
-<programlisting>
-rec {
-  x = 123;
-  y = import ./foo.nix x;
-}</programlisting>
-
-    and
-
-<programlisting>
-x: x + 456</programlisting>
-
-    (The function argument doesn’t have to be called
-    <varname>x</varname> in <filename>foo.nix</filename>; any name
-    would work.)</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.intersectAttrs</function>
-  <replaceable>e1</replaceable> <replaceable>e2</replaceable></term>
-
-    <listitem><para>Return an attribute set consisting of the
-    attributes in the set <replaceable>e2</replaceable> that also
-    exist in the set <replaceable>e1</replaceable>.</para></listitem>
-
-  </varlistentry>
-        
-    
-  <varlistentry><term><function>builtins.isAttrs</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if
-    <replaceable>e</replaceable> evaluates to an attribute set, and
-    <literal>false</literal> otherwise.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.isList</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if
-    <replaceable>e</replaceable> evaluates to a list, and
-    <literal>false</literal> otherwise.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.isFunction</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if
-    <replaceable>e</replaceable> evaluates to a function, and
-    <literal>false</literal> otherwise.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.isString</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if
-    <replaceable>e</replaceable> evaluates to a string, and
-    <literal>false</literal> otherwise.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.isInt</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if
-    <replaceable>e</replaceable> evaluates to a int, and
-    <literal>false</literal> otherwise.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.isBool</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if
-    <replaceable>e</replaceable> evaluates to a bool, and
-    <literal>false</literal> otherwise.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>isNull</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if
-    <replaceable>e</replaceable> evaluates to <literal>null</literal>,
-    and <literal>false</literal> otherwise.</para>
-
-    <warning><para>This function is <emphasis>deprecated</emphasis>;
-    just write <literal>e == null</literal> instead.</para></warning>
-    
-    </listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.length</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return the length of the list
-    <replaceable>e</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.lessThan</function>
-  <replaceable>e1</replaceable> <replaceable>e2</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if the integer
-    <replaceable>e1</replaceable> is less than the integer
-    <replaceable>e2</replaceable>, and <literal>false</literal>
-    otherwise.  Evaluation aborts if either
-    <replaceable>e1</replaceable> or <replaceable>e2</replaceable>
-    does not evaluate to an integer.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.listToAttrs</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Construct an attribute set from a list specifying
-    the names and values of each attribute.  Each element of the list
-    should be an attribute set consisting of a string-valued attribute
-    <varname>name</varname> specifying the name of the attribute, and
-    an attribute <varname>value</varname> specifying its value.
-    Example:
-
-<programlisting>
-builtins.listToAttrs [
-  {name = "foo"; value = 123;}
-  {name = "bar"; value = 456;}
-]
-</programlisting>
-
-    evaluates to
-
-<programlisting>
-{ foo = 123; bar = 456; }
-</programlisting>
-
-    </para></listitem>
-
-  </varlistentry>
-  
-  <varlistentry><term><function>map</function>
-  <replaceable>f</replaceable> <replaceable>list</replaceable></term>
-
-    <listitem><para>Apply the function <replaceable>f</replaceable> to
-    each element in the list <replaceable>list</replaceable>.  For
-    example,
-
-<programlisting>
-map (x: "foo" + x) ["bar" "bla" "abc"]</programlisting>
-
-    evaluates to <literal>["foobar" "foobla"
-    "fooabc"]</literal>.</para></listitem>
-    
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.mul</function>
-  <replaceable>e1</replaceable> <replaceable>e2</replaceable></term>
-
-    <listitem><para>Return the product of the integers
-    <replaceable>e1</replaceable> and
-    <replaceable>e2</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.parseDrvName</function>
-  <replaceable>s</replaceable></term>
-
-    <listitem><para>Split the string <replaceable>s</replaceable> into
-    a package name and version.  The package name is everything up to
-    but not including the first dash followed by a digit, and the
-    version is everything following that dash.  The result is returned
-    in an attribute set <literal>{name, version}</literal>.  Thus,
-    <literal>builtins.parseDrvName "nix-0.12pre12876"</literal>
-    returns <literal>{name = "nix"; version =
-    "0.12pre12876";}</literal>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.pathExists</function>
-  <replaceable>path</replaceable></term>
-
-    <listitem><para>Return <literal>true</literal> if the path
-    <replaceable>path</replaceable> exists, and
-    <literal>false</literal> otherwise.  One application of this
-    function is to conditionally include a Nix expression containing
-    user configuration:
-
-<programlisting>
-let
-  fileName = builtins.getEnv "CONFIG_FILE";
-  config =
-    if fileName != "" &amp;&amp; builtins.pathExists (builtins.toPath fileName)
-    then import (builtins.toPath fileName)
-    else { someSetting = false; }; <lineannotation># default configuration</lineannotation>
-in config.someSetting</programlisting>
-
-    (Note that <envar>CONFIG_FILE</envar> must be an absolute path for
-    this to work.)</para></listitem>
-
-  </varlistentry>
-
-
-  <!--
-  <varlistentry><term><function>relativise</function></term>
-
-    <listitem><para>TODO</para></listitem>
-
-  </varlistentry>
-  -->
-
-  
-  <varlistentry><term><function>builtins.readFile</function>
-  <replaceable>path</replaceable></term>
-
-    <listitem><para>Return the contents of the file
-    <replaceable>path</replaceable> as a string.</para></listitem>
-
-  </varlistentry>
-  
-  
-  <varlistentry><term><function>removeAttrs</function>
-  <replaceable>attrs</replaceable> <replaceable>list</replaceable></term>
-
-    <listitem><para>Remove the attributes listed in
-    <replaceable>list</replaceable> from the attribute set
-    <replaceable>attrs</replaceable>.  The attributes don’t have to
-    exist in <replaceable>attrs</replaceable>. For instance,
-
-<screen>
-removeAttrs { x = 1; y = 2; z = 3; } ["a" "x" "z"]</screen>
-
-    evaluates to <literal>{y = 2;}</literal>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.stringLength</function>
-  <replaceable>e</replaceable></term>
-
-    <listitem><para>Return the length of the string
-    <replaceable>e</replaceable>.  If <replaceable>e</replaceable> is
-    not a string, evaluation is aborted.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.sub</function>
-  <replaceable>e1</replaceable> <replaceable>e2</replaceable></term>
-
-    <listitem><para>Return the difference between the integers
-    <replaceable>e1</replaceable> and
-    <replaceable>e2</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.substring</function>
-  <replaceable>start</replaceable> <replaceable>len</replaceable>
-  <replaceable>s</replaceable></term>
-
-    <listitem><para>Return the substring of
-    <replaceable>s</replaceable> from character position
-    <replaceable>start</replaceable> (zero-based) up to but not
-    including <replaceable>start + len</replaceable>.  If
-    <replaceable>start</replaceable> is greater than the length of the
-    string, an empty string is returned, and if <replaceable>start +
-    len</replaceable> lies beyond the end of the string, only the
-    substring up to the end of the string is returned.
-    <replaceable>start</replaceable> must be
-    non-negative.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.tail</function>
-  <replaceable>list</replaceable></term>
-
-    <listitem><para>Return the second to last elements of a list;
-    abort evaluation if the argument isn’t a list or is an empty
-    list.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>throw</function>
-  <replaceable>s</replaceable></term>
-
-    <listitem><para>Throw an error message
-    <replaceable>s</replaceable>.  This usually aborts Nix expression
-    evaluation, but in <command>nix-env -qa</command> and other
-    commands that try to evaluate a set of derivations to get
-    information about those derivations, a derivation that throws an
-    error is silently skipped (which is not the case for
-    <function>abort</function>).</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry
-  xml:id='builtin-toFile'><term><function>builtins.toFile</function>
-  <replaceable>name</replaceable> <replaceable>s</replaceable></term>
-
-    <listitem><para>Store the string <replaceable>s</replaceable> in a
-    file in the Nix store and return its path.  The file has suffix
-    <replaceable>name</replaceable>.  This file can be used as an
-    input to derivations.  One application is to write builders
-    “inline”.  For instance, the following Nix expression combines
-    <xref linkend='ex-hello-nix' /> and <xref
-    linkend='ex-hello-builder' /> into one file:
-
-<programlisting>
-{stdenv, fetchurl, perl}:
-
-stdenv.mkDerivation {
-  name = "hello-2.1.1";
-  
-  builder = builtins.toFile "builder.sh" "
-    source $stdenv/setup
-
-    PATH=$perl/bin:$PATH
-
-    tar xvfz $src
-    cd hello-*
-    ./configure --prefix=$out
-    make
-    make install
-  ";
-
-  src = fetchurl {
-    url = http://nix.cs.uu.nl/dist/tarballs/hello-2.1.1.tar.gz;
-    md5 = "70c9ccf9fac07f762c24f2df2290784d";
-  };
-  inherit perl;
-}</programlisting>
-  
-    </para>
-
-    <para>It is even possible for one file to refer to another, e.g.,
-
-<programlisting>
-  builder = let
-    configFile = builtins.toFile "foo.conf" "
-      # This is some dummy configuration file.
-      <replaceable>...</replaceable>
-    ";
-  in builtins.toFile "builder.sh" "
-    source $stdenv/setup
-    <replaceable>...</replaceable>
-    cp ${configFile} $out/etc/foo.conf
-  ";</programlisting>
-
-    Note that <literal>${configFile}</literal> is an antiquotation
-    (see <xref linkend='ssec-values' />), so the result of the
-    expression <literal>configFile</literal> (i.e., a path like
-    <filename>/nix/store/m7p7jfny445k...-foo.conf</filename>) will be
-    spliced into the resulting string.</para>
-
-    <para>It is however <emphasis>not</emphasis> allowed to have files
-    mutually referring to each other, like so:
-
-<programlisting>
-let
-  foo = builtins.toFile "foo" "...${bar}...";
-  bar = builtins.toFile "bar" "...${foo}...";
-in foo</programlisting>
-
-    This is not allowed because it would cause a cyclic dependency in
-    the computation of the cryptographic hashes for
-    <varname>foo</varname> and <varname>bar</varname>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.toPath</function> <replaceable>s</replaceable></term>
-
-    <listitem><para>Convert the string value
-    <replaceable>s</replaceable> into a path value.  The string
-    <replaceable>s</replaceable> must represent an absolute path
-    (i.e., must start with <literal>/</literal>).  The path need not
-    exist.  The resulting path is canonicalised, e.g.,
-    <literal>builtins.toPath "//foo/xyzzy/../bar/"</literal> returns
-    <literal>/foo/bar</literal>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>toString</function> <replaceable>e</replaceable></term>
-
-    <listitem><para>Convert the expression
-    <replaceable>e</replaceable> to a string.
-    <replaceable>e</replaceable> can be a string (in which case
-    <function>toString</function> is a no-op) or a path (e.g.,
-    <literal>toString /foo/bar</literal> yields
-    <literal>"/foo/bar"</literal>.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry xml:id='builtin-toXML'><term><function>builtins.toXML</function> <replaceable>e</replaceable></term>
-
-    <listitem><para>Return a string containing an XML representation
-    of <replaceable>e</replaceable>.  The main application for
-    <function>toXML</function> is to communicate information with the
-    builder in a more structured format than plain environment
-    variables.</para>
-
-    <!-- TODO: more formally describe the schema of the XML
-    representation -->
-
-    <para><xref linkend='ex-toxml' /> shows an example where this is
-    the case.  The builder is supposed to generate the configuration
-    file for a <link xlink:href='http://jetty.mortbay.org/'>Jetty
-    servlet container</link>.  A servlet container contains a number
-    of servlets (<filename>*.war</filename> files) each exported under
-    a specific URI prefix.  So the servlet configuration is a list of
-    attribute sets containing the <varname>path</varname> and
-    <varname>war</varname> of the servlet (<xref
-    linkend='ex-toxml-co-servlets' />).  This kind of information is
-    difficult to communicate with the normal method of passing
-    information through an environment variable, which just
-    concatenates everything together into a string (which might just
-    work in this case, but wouldn’t work if fields are optional or
-    contain lists themselves).  Instead the Nix expression is
-    converted to an XML representation with
-    <function>toXML</function>, which is unambiguous and can easily be
-    processed with the appropriate tools.  For instance, in the
-    example an XSLT stylesheet (<xref linkend='ex-toxml-co-stylesheet'
-    />) is applied to it (<xref linkend='ex-toxml-co-apply' />) to
-    generate the XML configuration file for the Jetty server.  The XML
-    representation produced from <xref linkend='ex-toxml-co-servlets'
-    /> by <function>toXML</function> is shown in <xref
-    linkend='ex-toxml-result' />.</para>
-
-    <para>Note that <xref linkend='ex-toxml' /> uses the <function
-    linkend='builtin-toFile'>toFile</function> built-in to write the
-    builder and the stylesheet “inline” in the Nix expression.  The
-    path of the stylesheet is spliced into the builder at
-    <literal>xsltproc ${stylesheet}
-    <replaceable>...</replaceable></literal>.</para>
-
-    <example xml:id='ex-toxml'><title>Passing information to a builder
-    using <function>toXML</function></title>
-    
-<programlisting><![CDATA[
-{stdenv, fetchurl, libxslt, jira, uberwiki}:
-
-stdenv.mkDerivation (rec {
-  name = "web-server";
-
-  buildInputs = [libxslt];
-  
-  builder = builtins.toFile "builder.sh" "
-    source $stdenv/setup
-    mkdir $out
-    echo $servlets | xsltproc ${stylesheet} - > $out/server-conf.xml]]> <co xml:id='ex-toxml-co-apply' /> <![CDATA[
-  ";
-
-  stylesheet = builtins.toFile "stylesheet.xsl"]]> <co xml:id='ex-toxml-co-stylesheet' /> <![CDATA[
-   "<?xml version='1.0' encoding='UTF-8'?>
-    <xsl:stylesheet xmlns:xsl='http://www.w3.org/1999/XSL/Transform' version='1.0'>
-      <xsl:template match='/'>
-        <Configure>
-          <xsl:for-each select='/expr/list/attrs'>
-            <Call name='addWebApplication'>
-              <Arg><xsl:value-of select=\"attr[@name = 'path']/string/@value\" /></Arg>
-              <Arg><xsl:value-of select=\"attr[@name = 'war']/path/@value\" /></Arg>
-            </Call>
-          </xsl:for-each>
-        </Configure>
-      </xsl:template>
-    </xsl:stylesheet>
-  ";
-
-  servlets = builtins.toXML []]> <co xml:id='ex-toxml-co-servlets' /> <![CDATA[
-    { path = "/bugtracker"; war = jira + "/lib/atlassian-jira.war"; }
-    { path = "/wiki"; war = uberwiki + "/uberwiki.war"; }
-  ];
-})]]></programlisting>
-
-    </example>
-
-    <example xml:id='ex-toxml-result'><title>XML representation produced by
-    <function>toXML</function></title>
-    
-<programlisting><![CDATA[<?xml version='1.0' encoding='utf-8'?>
-<expr>
-  <list>
-    <attrs>
-      <attr name="path">
-        <string value="/bugtracker" />
-      </attr>
-      <attr name="war">
-        <path value="/nix/store/d1jh9pasa7k2...-jira/lib/atlassian-jira.war" />
-      </attr>
-    </attrs>
-    <attrs>
-      <attr name="path">
-        <string value="/wiki" />
-      </attr>
-      <attr name="war">
-        <path value="/nix/store/y6423b1yi4sx...-uberwiki/uberwiki.war" />
-      </attr>
-    </attrs>
-  </list>
-</expr>]]></programlisting>
-
-    </example>
-
-    </listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><function>builtins.trace</function>
-  <replaceable>e1</replaceable> <replaceable>e2</replaceable></term>
-
-    <listitem><para>Evaluate <replaceable>e1</replaceable> and print its
-    abstract syntax representation on standard error.  Then return
-    <replaceable>e2</replaceable>.  This function is useful for
-    debugging.</para></listitem>
-
-  </varlistentry>
-
-  
-</variablelist>
-
-
-</section>

doc/manual/conf-file.xml

@@ -1,272 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id="sec-conf-file">
-
-<title>Nix configuration file</title>
-
-
-<para>A number of persistent settings of Nix are stored in the file
-<filename><replaceable>prefix</replaceable>/etc/nix/nix.conf</filename>.
-This file is a list of <literal><replaceable>name</replaceable> =
-<replaceable>value</replaceable></literal> pairs, one per line.
-Comments start with a <literal>#</literal> character.  An example
-configuration file is shown in <xref linkend="ex-nix-conf" />.</para>
-
-<example xml:id='ex-nix-conf'><title>Nix configuration file</title>
-
-<programlisting>
-gc-keep-outputs = true       # Nice for developers
-gc-keep-derivations = true   # Idem
-env-keep-derivations = false
-</programlisting>
-</example>
-
-<para>The following variables are currently available: 
-
-<variablelist>
-
-  
-  <varlistentry xml:id="conf-gc-keep-outputs"><term><literal>gc-keep-outputs</literal></term>
-
-    <listitem><para>If <literal>true</literal>, the garbage collector
-    will keep the outputs of non-garbage derivations.  If
-    <literal>false</literal> (default), outputs will be deleted unless
-    they are GC roots themselves (or reachable from other roots).</para>
- 
-    <para>In general, outputs must be registered as roots separately.
-    However, even if the output of a derivation is registered as a
-    root, the collector will still delete store paths that are used
-    only at build time (e.g., the C compiler, or source tarballs
-    downloaded from the network).  To prevent it from doing so, set
-    this option to <literal>true</literal>.</para></listitem>
-
-  </varlistentry>
-  
-
-  <varlistentry xml:id="conf-gc-keep-derivations"><term><literal>gc-keep-derivations</literal></term>
-
-    <listitem><para>If <literal>true</literal> (default), the garbage
-    collector will keep the derivations from which non-garbage store
-    paths were built.  If <literal>false</literal>, they will be
-    deleted unless explicitly registered as a root (or reachable from
-    other roots).</para>
-
-    <para>Keeping derivation around is useful for querying and
-    traceability (e.g., it allows you to ask with what dependencies or
-    options a store path was built), so by default this option is on.
-    Turn it off to safe a bit of disk space (or a lot if
-    <literal>gc-keep-outputs</literal> is also turned on).</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><literal>env-keep-derivations</literal></term>
-
-    <listitem><para>If <literal>false</literal> (default), derivations
-    are not stored in Nix user environments.  That is, the derivation
-    any build-time-only dependencies may be garbage-collected.</para>
-
-    <para>If <literal>true</literal>, when you add a Nix derivation to
-    a user environment, the path of the derivation is stored in the
-    user environment.  Thus, the derivation will not be
-    garbage-collected until the user environment generation is deleted
-    (<command>nix-env --delete-generations</command>).  To prevent
-    build-time-only dependencies from being collected, you should also
-    turn on <literal>gc-keep-outputs</literal>.</para>
-
-    <para>The difference between this option and
-    <literal>gc-keep-derivations</literal> is that this one is
-    “sticky”: it applies to any user environment created while this
-    option was enabled, while <literal>gc-keep-derivations</literal>
-    only applies at the moment the garbage collector is
-    run.</para></listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry xml:id="conf-build-max-jobs"><term><literal>build-max-jobs</literal></term>
-
-    <listitem><para>This option defines the maximum number of jobs
-    that Nix will try to build in parallel.  The default is
-    <literal>1</literal>.  You should generally set it to the number
-    of CPUs in your system (e.g., <literal>2</literal> on a Athlon 64
-    X2).  It can be overriden using the <option
-    linkend='opt-max-jobs'>--max-jobs</option> (<option>-j</option>)
-    command line switch.</para></listitem>
-
-  </varlistentry>
-
-
-  <varlistentry xml:id="conf-build-cores"><term><literal>build-cores</literal></term>
-
-    <listitem><para>Sets the value of the
-    <envar>NIX_BUILD_CORES</envar> environment variable in the
-    invocation of builders.  Builders can use this variable at their
-    discretion to control the maximum amount of parallelism.  For
-    instance, in Nixpkgs, if the derivation attribute
-    <varname>enableParallelBuilding</varname> is set to
-    <literal>true</literal>, the builder passes the
-    <option>-j<replaceable>N</replaceable></option> flag to GNU Make.
-    It can be overriden using the <option
-    linkend='opt-cores'>--cores</option> command line switch and
-    defaults to <literal>1</literal>.  The value <literal>0</literal>
-    means that the builder should use all available CPU cores in the
-    system.</para></listitem>
-
-  </varlistentry>
-
-
-  <varlistentry xml:id="conf-build-max-silent-time"><term><literal>build-max-silent-time</literal></term>
-
-    <listitem>
-
-      <para>This option defines the maximum number of seconds that a
-      builder can go without producing any data on standard output or
-      standard error.  This is useful (for instance in a automated
-      build system) to catch builds that are stuck in an infinite
-      loop, or to catch remote builds that are hanging due to network
-      problems.  It can be overriden using the <option
-      linkend="opt-max-silent-time">--max-silent-time</option> command
-      line switch.</para>
-
-      <para>The value <literal>0</literal> means that there is no
-      timeout.  This is also the default.</para>
-
-    </listitem>
-
-  </varlistentry>
-
-
-  <varlistentry xml:id="conf-build-users-group"><term><literal>build-users-group</literal></term>
-
-    <listitem><para>This options specifies the Unix group containing
-    the Nix build user accounts.  In multi-user Nix installations,
-    builds should not be performed by the Nix account since that would
-    allow users to arbitrarily modify the Nix store and database by
-    supplying specially crafted builders; and they cannot be performed
-    by the calling user since that would allow him/her to influence
-    the build result.</para>
-
-    <para>Therefore, if this option is non-empty and specifies a valid
-    group, builds will be performed under the user accounts that are a
-    member of the group specified here (as listed in
-    <filename>/etc/group</filename>).  Those user accounts should not
-    be used for any other purpose!</para>
-
-    <para>Nix will never run two builds under the same user account at
-    the same time.  This is to prevent an obvious security hole: a
-    malicious user writing a Nix expression that modifies the build
-    result of a legitimate Nix expression being built by another user.
-    Therefore it is good to have as many Nix build user accounts as
-    you can spare.  (Remember: uids are cheap.)</para>
-
-    <para>The build users should have permission to create files in
-    the Nix store, but not delete them.  Therefore,
-    <filename>/nix/store</filename> should be owned by the Nix
-    account, its group should be the group specified here, and its
-    mode should be <literal>1775</literal>.</para>
-
-    <para>If the build users group is empty, builds will be performed
-    under the uid of the Nix process (that is, the uid of the caller
-    if <envar>NIX_REMOTE</envar> is empty, the uid under which the Nix
-    daemon runs if <envar>NIX_REMOTE</envar> is
-    <literal>daemon</literal>, or the uid that owns the setuid
-    <command>nix-worker</command> program if <envar>NIX_REMOTE</envar>
-    is <literal>slave</literal>).  Obviously, this should not be used
-    in multi-user settings with untrusted users.</para>
-
-    </listitem>
-
-  </varlistentry>
-
-
-  <varlistentry><term><literal>build-use-chroot</literal></term>
-
-    <listitem><para>If set to <literal>true</literal>, builds will be
-    performed in a <emphasis>chroot environment</emphasis>, i.e., the
-    build will be isolated from the normal file system hierarchy and
-    will only see the Nix store, the temporary build directory, and
-    the directories configured with the <link
-    linkend='conf-build-chroot-dirs'><literal>build-chroot-dirs</literal>
-    option</link> (such as <filename>/proc</filename> and
-    <filename>/dev</filename>).  This is useful to prevent undeclared
-    dependencies on files in directories such as
-    <filename>/usr/bin</filename>.</para>
-
-    <para>The use of a chroot requires that Nix is run as root (but
-    you can still use the <link
-    linkend='conf-build-users-group'>“build users” feature</link> to
-    perform builds under different users than root).  Currently,
-    chroot builds only work on Linux because Nix uses “bind mounts” to
-    make the Nix store and other directories available inside the
-    chroot.</para>
-
-    </listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry xml:id="conf-build-chroot-dirs"><term><literal>build-chroot-dirs</literal></term>
-
-    <listitem><para>When builds are performed in a chroot environment,
-    Nix will mount (using <command>mount --bind</command> on Linux)
-    some directories from the normal file system hierarchy inside the
-    chroot.  These are the Nix store, the temporary build directory
-    (usually
-    <filename>/tmp/nix-<replaceable>pid</replaceable>-<replaceable>number</replaceable></filename>)
-    and the directories listed here.  The default is <literal>dev
-    /proc</literal>.  Files in <filename>/dev</filename> (such as
-    <filename>/dev/null</filename>) are needed by many builds, and
-    some files in <filename>/proc</filename> may also be needed
-    occasionally.</para>
-
-    <para>The value used on NixOS is
-    
-<programlisting>
-build-use-chroot = /dev /proc /bin</programlisting>
-
-    to make the <filename>/bin/sh</filename> symlink available (which
-    is still needed by many builders).</para>
-
-    </listitem>
-
-  </varlistentry>
-
-  
-  <varlistentry><term><literal>system</literal></term>
-
-    <listitem><para>This option specifies the canonical Nix system
-    name of the current installation, such as
-    <literal>i686-linux</literal> or
-    <literal>powerpc-darwin</literal>.  Nix can only build derivations
-    whose <literal>system</literal> attribute equals the value
-    specified here.  In general, it never makes sense to modify this
-    value from its default, since you can use it to ‘lie’ about the
-    platform you are building on (e.g., perform a Mac OS build on a
-    Linux machine; the result would obviously be wrong).  It only
-    makes sense if the Nix binaries can run on multiple platforms,
-    e.g., ‘universal binaries’ that run on <literal>powerpc-darwin</literal> and
-    <literal>i686-darwin</literal>.</para>
-
-    <para>It defaults to the canonical Nix system name detected by
-    <filename>configure</filename> at build time.</para></listitem>
-
-  </varlistentry>
-
-
-  <varlistentry><term><literal>fsync-metadata</literal></term>
-
-    <listitem><para>If set to <literal>true</literal>, changes to the
-    Nix store metadata (in <filename>/nix/var/nix/db</filename>) are
-    synchronously flushed to disk.  This improves robustness in case
-    of system crashes, but reduces performance.  The default is
-    <literal>true</literal>.</para></listitem>
-
-  </varlistentry>
-    
-</variablelist>
-
-</para>
-
-
-</section>

doc/manual/env-common.xml

@@ -1,289 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id="sec-common-env">
-
-<title>Common environment variables</title>
-
-
-<para>Most Nix commands interpret the following environment variables:</para>
-
-<variablelist>
-
-  
-<varlistentry><term><envar>NIX_IGNORE_SYMLINK_STORE</envar></term>
-
-  <listitem>
-
-  <para>Normally, the Nix store directory (typically
-  <filename>/nix/store</filename>) is not allowed to contain any
-  symlink components.  This is to prevent “impure” builds.  Builders
-  sometimes “canonicalise” paths by resolving all symlink components.
-  Thus, builds on different machines (with
-  <filename>/nix/store</filename> resolving to different locations)
-  could yield different results.  This is generally not a problem,
-  except when builds are deployed to machines where
-  <filename>/nix/store</filename> resolves differently.  If you are
-  sure that you’re not going to do that, you can set
-  <envar>NIX_IGNORE_SYMLINK_STORE</envar> to <envar>1</envar>.</para>
-
-  <para>Note that if you’re symlinking the Nix store so that you can
-  put it on another file system than the root file system, on Linux
-  you’re better off using <literal>bind</literal> mount points, e.g.,
-
-  <screen>
-$ mkdir /nix   
-$ mount -o bind /mnt/otherdisk/nix /nix</screen>
-
-  Consult the <citerefentry><refentrytitle>mount</refentrytitle>
-  <manvolnum>8</manvolnum></citerefentry> manual page for details.</para>
-
-  </listitem>
-
-</varlistentry>
-
-
-<varlistentry><term><envar>NIX_STORE_DIR</envar></term>
-
-  <listitem><para>Overrides the location of the Nix store (default
-  <filename><replaceable>prefix</replaceable>/store</filename>).</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><envar>NIX_DATA_DIR</envar></term>
-
-  <listitem><para>Overrides the location of the Nix static data
-  directory (default
-  <filename><replaceable>prefix</replaceable>/share</filename>).</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><envar>NIX_LOG_DIR</envar></term>
-
-  <listitem><para>Overrides the location of the Nix log directory
-  (default <filename><replaceable>prefix</replaceable>/log/nix</filename>).</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><envar>NIX_STATE_DIR</envar></term>
-
-  <listitem><para>Overrides the location of the Nix state directory
-  (default <filename><replaceable>prefix</replaceable>/var/nix</filename>).</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><envar>NIX_DB_DIR</envar></term>
-
-  <listitem><para>Overrides the location of the Nix database (default
-  <filename><replaceable>$NIX_STATE_DIR</replaceable>/db</filename>, i.e.,
-  <filename><replaceable>prefix</replaceable>/var/nix/db</filename>).</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><envar>NIX_CONF_DIR</envar></term>
-
-  <listitem><para>Overrides the location of the Nix configuration
-  directory (default
-  <filename><replaceable>prefix</replaceable>/etc/nix</filename>).</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><envar>NIX_LOG_TYPE</envar></term>
-
-  <listitem><para>Equivalent to the <link
-  linkend="opt-log-type"><option>--log-type</option>
-  option</link>.</para></listitem>
-
-</varlistentry>
-  
-
-<varlistentry><term><envar>TMPDIR</envar></term>
-
-  <listitem><para>Use the specified directory to store temporary
-  files.  In particular, this includes temporary build directories;
-  these can take up substantial amounts of disk space.  The default is
-  <filename>/tmp</filename>.</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry xml:id="envar-build-hook"><term><envar>NIX_BUILD_HOOK</envar></term>
-
-  <listitem>
-
-  <para>Specifies the location of the <emphasis>build hook</emphasis>,
-  which is a program (typically some script) that Nix will call
-  whenever it wants to build a derivation.  This is used to implement
-  distributed builds (see <xref linkend="sec-distributed-builds"
-  />).  The protocol by which the calling Nix process and the build
-  hook communicate is as follows.</para>
-
-  <para>The build hook is called with the following command-line
-  arguments:
-
-  <orderedlist>
-
-    <listitem><para>A boolean value <literal>0</literal> or
-    <literal>1</literal> specifying whether Nix can locally execute
-    more builds, as per the <link
-    linkend="opt-max-jobs"><option>--max-jobs</option> option</link>.
-    The purpose of this argument is to allow the hook to not have to
-    maintain bookkeeping for the local machine.</para></listitem>
-
-    <listitem><para>The Nix platform identifier for the local machine
-    (e.g., <literal>i686-linux</literal>).</para></listitem>
-
-    <listitem><para>The Nix platform identifier for the derivation,
-    i.e., its <link linkend="attr-system"><varname>system</varname>
-    attribute</link>.</para></listitem>
-
-    <listitem><para>The store path of the derivation.</para></listitem>
-
-  </orderedlist>
-
-  </para>
-
-  <para>On the basis of this information, and whatever persistent
-  state the build hook keeps about other machines and their current
-  load, it has to decide what to do with the build.  It should print
-  out on standard error one of the following responses (terminated by
-  a newline, <literal>"\n"</literal>):
-
-  <variablelist>
-
-    <varlistentry><term><literal># decline</literal></term>
-
-      <listitem><para>The build hook is not willing or able to perform
-      the build; the calling Nix process should do the build itself,
-      if possible.</para></listitem>
-
-    </varlistentry>
-
-    <varlistentry><term><literal># postpone</literal></term>
-
-      <listitem><para>The build hook cannot perform the build now, but
-      can do so in the future (e.g., because all available build slots
-      on remote machines are in use).  The calling Nix process should
-      postpone this build until at least one currently running build
-      has terminated.</para></listitem>
-
-    </varlistentry>
-
-    <varlistentry><term><literal># accept</literal></term>
-
-      <listitem><para>The build hook has accepted the
-      build.</para></listitem>
-
-    </varlistentry>
-
-  </variablelist>
-
-  </para>
-
-  <para>After sending <literal># accept</literal>, the hook should
-  read one line from standard input, which will be the string
-  <literal>okay</literal>.  It can then proceed with the build.
-  Before sending <literal>okay</literal>, Nix will store in the hook’s
-  current directory a number of text files that contain information
-  about the derivation:
-
-  <variablelist>
-
-    <varlistentry><term><filename>inputs</filename></term>
-
-      <listitem><para>The set of store paths that are inputs to the
-      build process (one per line).  These have to be copied
-      <emphasis>to</emphasis> the remote machine (in addition to the
-      store derivation itself).</para></listitem>
-
-    </varlistentry>
-  
-    <varlistentry><term><filename>outputs</filename></term>
-
-      <listitem><para>The set of store paths that are outputs of the
-      derivation (one per line).  These have to be copied
-      <emphasis>from</emphasis> the remote machine if the build
-      succeeds.</para></listitem>
-
-    </varlistentry>
-
-    <varlistentry><term><filename>references</filename></term>
-
-      <listitem><para>The reference graph of the inputs, in the format
-      accepted by the command <command>nix-store
-      --register-validity</command>.  It is necessary to run this
-      command on the remote machine after copying the inputs to inform
-      Nix on the remote machine that the inputs are valid
-      paths.</para></listitem>
-
-    </varlistentry>
-
-  </variablelist>
-
-  </para>
-
-  <para>The hook should copy the inputs to the remote machine,
-  register the validity of the inputs, perform the remote build, and
-  copy the outputs back to the local machine.  An exit code other than
-  <literal>0</literal> indicates that the hook has failed.  An exit
-  code equal to 100 means that the remote build failed (as opposed to,
-  e.g., a network error).</para>
-
-  </listitem>
-
-
-</varlistentry>
-
-
-<varlistentry xml:id="envar-remote"><term><envar>NIX_REMOTE</envar></term>
-
-  <listitem><para>This variable should be set to
-  <literal>daemon</literal> if you want to use the Nix daemon to
-  executed Nix operations, which is necessary in <link
-  linkend="ssec-multi-user">multi-user Nix installations</link>.
-  Otherwise, it should be left unset.</para></listitem>
-
-</varlistentry>
-
-    
-<varlistentry xml:id="envar-other-stores"><term><envar>NIX_OTHER_STORES</envar></term>
-
-  <listitem><para>This variable contains the paths of remote Nix
-  installations from whichs paths can be copied, separated by colons.
-  See <xref linkend="sec-sharing-packages" /> for details.  Each path
-  should be the <filename>/nix</filename> directory of a remote Nix
-  installation (i.e., not the <filename>/nix/store</filename>
-  directory).  The paths are subject to globbing, so you can set it so
-  something like <literal>/var/run/nix/remote-stores/*/nix</literal>
-  and mount multiple remote filesystems in
-  <literal>/var/run/nix/remote-stores</literal>.</para>
-
-  <para>Note that if you’re building through the <link
-  linkend="sec-nix-worker">Nix daemon</link>, the only setting for
-  this variable that matters is the one that the
-  <command>nix-worker</command> process uses.  So if you want to
-  change it, you have to restart the daemon.</para></listitem>
-
-</varlistentry>
-
-
-<varlistentry><term><envar>GC_INITIAL_HEAP_SIZE</envar></term>
-
-  <listitem><para>If Nix has been configured to use the Boehm garbage
-  collector, this variable sets the initial size of the heap in bytes.
-  It defaults to 384 MiB.  Setting it to a low value reduces memory
-  consumption, but will increase runtime due to the overhead of
-  garbage collection.</para></listitem>
-
-</varlistentry>
-
-    
-</variablelist>
-
-
-</section>

doc/manual/glossary.xml

@@ -1,167 +0,0 @@
-<appendix xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink">
-
-<title>Glossary</title>
-
-
-<glosslist>
-
-
-<glossentry xml:id="gloss-derivation"><glossterm>derivation</glossterm>
-
-  <glossdef><para>A description of a build action.  The result of a
-  derivation is a store object.  Derivations are typically specified
-  in Nix expressions using the <link
-  linkend="ssec-derivation"><function>derivation</function>
-  primitive</link>.  These are translated into low-level
-  <emphasis>store derivations</emphasis> (implicitly by
-  <command>nix-env</command> and <command>nix-build</command>, or
-  explicitly by <command>nix-instantiate</command>).</para></glossdef>
-
-</glossentry>
-
-
-<glossentry><glossterm>store</glossterm>
-
-  <glossdef><para>The location in the file system where store objects
-  live.  Typically <filename>/nix/store</filename>.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry><glossterm>store path</glossterm>
-
-  <glossdef><para>The location in the file system of a store object,
-  i.e., an immediate child of the Nix store
-  directory.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry><glossterm>store object</glossterm>
-
-  <glossdef><para>A file that is an immediate child of the Nix store
-  directory.  These can be regular files, but also entire directory
-  trees.  Store objects can be sources (objects copied from outside of
-  the store), derivation outputs (objects produced by running a build
-  action), or derivations (files describing a build
-  action).</para></glossdef>
-
-</glossentry>
-
-
-<glossentry xml:id="gloss-substitute"><glossterm>substitute</glossterm>
-
-  <glossdef><para>A substitute is a command invocation stored in the
-  Nix database that describes how to build a store object, bypassing
-  normal the build mechanism (i.e., derivations).  Typically, the
-  substitute builds the store object by downloading a pre-built
-  version of the store object from some server.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry><glossterm>purity</glossterm>
-
-  <glossdef><para>The assumption that equal Nix derivations when run
-  always produce the same output.  This cannot be guaranteed in
-  general (e.g., a builder can rely on external inputs such as the
-  network or the system time) but the Nix model assumes
-  it.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry><glossterm>Nix expression</glossterm>
-
-  <glossdef><para>A high-level description of software packages and
-  compositions thereof.  Deploying software using Nix entails writing
-  Nix expressions for your packages.  Nix expressions are translated
-  to derivations that are stored in the Nix store.  These derivations
-  can then be built.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry xml:id="gloss-reference"><glossterm>reference</glossterm>
-
-  <glossdef><para>A store path <varname>P</varname> is said to have a
-  reference to a store path <varname>Q</varname> if the store object
-  at <varname>P</varname> contains the path <varname>Q</varname>
-  somewhere.  This implies than an execution involving
-  <varname>P</varname> potentially needs <varname>Q</varname> to be
-  present.  The <emphasis>references</emphasis> of a store path are
-  the set of store paths to which it has a reference.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry xml:id="gloss-closure"><glossterm>closure</glossterm>
-
-  <glossdef><para>The closure of a store path is the set of store
-  paths that are directly or indirectly “reachable” from that store
-  path; that is, it’s the closure of the path under the <link
-  linkend="gloss-reference">references</link> relation.  For instance,
-  if the store object at path <varname>P</varname> contains a
-  reference to path <varname>Q</varname>, then <varname>Q</varname> is
-  in the closure of <varname>P</varname>.  For correct deployment it
-  is necessary to deploy whole closures, since otherwise at runtime
-  files could be missing.  The command <command>nix-store
-  -qR</command> prints out closures of store paths.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry xml:id="gloss-output-path"><glossterm>output path</glossterm>
-
-  <glossdef><para>A store path produced by a derivation.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry xml:id="gloss-deriver"><glossterm>deriver</glossterm>
-
-  <glossdef><para>The deriver of an <link
-  linkend="gloss-output-path">output path</link> is the store
-  derivation that built it.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry xml:id="gloss-validity"><glossterm>validity</glossterm>
-
-  <glossdef><para>A store path is considered
-  <emphasis>valid</emphasis> if it exists in the file system, is
-  listed in the Nix database as being valid, and if all paths in its
-  closure are also valid.</para></glossdef>
-
-</glossentry>
-
-
-<glossentry xml:id="gloss-user-env"><glossterm>user environment</glossterm>
-
-  <glossdef><para>An automatically generated store object that
-  consists of a set of symlinks to “active” applications, i.e., other
-  store paths.  These are generated automatically by <link
-  linkend="sec-nix-env"><command>nix-env</command></link>.  See <xref
-  linkend="sec-profiles" />.</para>
-
-  </glossdef>
-  
-</glossentry>
-
-
-<glossentry xml:id="gloss-profile"><glossterm>profile</glossterm>
-
-  <glossdef><para>A symlink to the current <link
-  linkend="gloss-user-env">user environment</link> of a user, e.g.,
-  <filename>/nix/var/nix/profiles/default</filename>.</para></glossdef>
-
-</glossentry>
-
-
-
-</glosslist>
-
-
-</appendix>

doc/manual/installation.xml

@@ -1,482 +1,211 @@
-<?xml version="1.0" encoding="utf-8"?>
-<chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id="chap-installation">
+<chapter id='chap-installation'>
+  <title>Installation</title>
 
-<title>Installation</title>
+  <sect1>
+    <title>Obtaining Nix</title>
 
+    <para>
+      The easiest way to obtain Nix is to download a <ulink
+      url='http://www.cs.uu.nl/groups/ST/Trace/Nix'>source
+      distribution</ulink>.  RPMs for SuSE and Red Hat are also
+      available.  These distributions are generated automatically.
+    </para>
 
-<section><title>Supported platforms</title>
+    <para>
+      Alternatively, the most recent sources of Nix can be obtained from its
+      <ulink url='https://svn.cs.uu.nl:12443/repos/trace/nix/trunk'>Subversion 
+        repository</ulink>.  For example, the following command will check out
+      the latest revision into a directory called <filename>nix</filename>:
+    </para>
 
-<para>Nix is currently supported on the following platforms:
+    <screen>
+$ svn checkout https://svn.cs.uu.nl:12443/repos/trace/nix/trunk nix</screen>
 
-<itemizedlist>
+    <para>
+      Likewise, specific releases can be obtained from the <ulink
+        url='https://svn.cs.uu.nl:12443/repos/trace/nix/tags'>tags
+        directory</ulink> of the repository.  If you don't have Subversion, you
+      can also download an automatically generated <ulink
+        url='https://svn.cs.uu.nl:12443/dist/trace/'>compressed
+        tar-file</ulink> of the head revision of the trunk.
+    </para>
 
-  <listitem><para>Linux (particularly on x86, x86_64, and
-  PowerPC).</para></listitem>
+  </sect1>
 
-  <listitem><para>Mac OS X, both on Intel and
-  PowerPC.</para></listitem>
+  <sect1>
+    <title>Prerequisites</title>
 
-  <listitem><para>FreeBSD (only tested on Intel).</para></listitem>
+    <para>
+      The following prerequisites only apply when you build from
+      source.  Binary releases (e.g., RPMs) have no prerequisites.
+    </para>
 
-  <listitem><para>Windows through <link
-  xlink:href="http://www.cygwin.com/">Cygwin</link>.</para>
+    <para>
+      A fairly recent version of GCC/G++ is required.  Version 2.95
+      and higher should work.
+    </para>
 
-  <warning><para>On Cygwin, Nix <emphasis>must</emphasis> be installed
-  on an NTFS partition.  It will not work correctly on a FAT
-  partition.</para></warning>
+    <para>
+      To build this manual and the man-pages you need the
+      <command>xmllint</command> and <command>xsltproc</command>
+      programs, which are part of the <literal>libxml2</literal> and
+      <literal>libxslt</literal> packages, respectively.  You also
+      need the <ulink
+      url='http://docbook.sourceforge.net/projects/xsl/'>DocBook XSL
+      stylesheets</ulink> and optionally the <ulink
+      url='http://www.oasis-open.org/docbook/xml/4.2/docbook-xml-4.2.zip'>
+      DocBook XML 4.2 DTD</ulink>.  Note that these are only required
+      if you modify the manual sources or when you are building from
+      the Subversion repository.
+    </para>
 
-  </listitem>
+    <para>
+      To build the parser, very <emphasis>recent</emphasis> versions
+      of Bison and Flex are required.  (This is because Nix needs GLR
+      support in Bison and reentrancy support in Flex.)  For Bison,
+      you need version 1.875c or higher (1.875 does
+      <emphasis>not</emphasis> work), which can be obtained from the
+      <ulink url='ftp://alpha.gnu.org/pub/gnu/bison'>GNU FTP
+      server</ulink>.  For Flex, you need version 2.5.31, which is
+      available on <ulink
+      url='http://lex.sourceforge.net/'>SourceForge</ulink>.  Slightly
+      older versions may also work, but ancient versions like the
+      ubiquitous 2.5.4a won't.  Note that these are only required if
+      you modify the parser or when you are building from the
+      Subversion repository.
+    </para>
 
-</itemizedlist>
+    <para>
+      Nix uses Sleepycat's Berkeley DB and CWI's ATerm library.  These
+      are included in the Nix source distribution.  If you build from
+      the Subversion repository, you must download them yourself and
+      place them in the <filename>externals/</filename> directory.
+      See <filename>externals/Makefile.am</filename> for the precise
+      URLs of these packages.
+    </para>
+  </sect1>
 
-</para>
+  <sect1>
+    <title>Building Nix from source</title>
 
-<para>Nix is pretty portable, so it should work on most other Unix
-platforms as well.</para>
+    <para>
+      After unpacking or checking out the Nix sources, issue the following
+      commands:
+    </para>
 
-</section>
-
-
-<section><title>Obtaining Nix</title>
-
-<para>The easiest way to obtain Nix is to download a <link
-xlink:href="http://nixos.org/">source distribution</link>.  RPMs
-for Red Hat, SuSE, and Fedora Core are also available.</para>
-
-<para>Alternatively, the most recent sources of Nix can be obtained
-from its <link
-xlink:href="https://svn.nixos.org/repos/nix/nix/trunk">Subversion
-repository</link>.  For example, the following command will check out
-the latest revision into a directory called
-<filename>nix</filename>:</para>
-
-<screen>
-$ svn checkout https://svn.nixos.org/repos/nix/nix/trunk nix</screen>
-
-<para>Likewise, specific releases can be obtained from the <link
-xlink:href="https://svn.nixos.org/repos/nix/nix/tags">tags
-directory</link> of the repository.</para>
-
-</section>
-
-
-<section><title>Prerequisites</title>
-
-<para><emphasis>The following prerequisites only apply when you build
-from source</emphasis>.  Binary releases (e.g., RPMs) have no
-prerequisites.</para>
-
-<para>A fairly recent version of GCC/G++ is required.  Version 2.95
-and higher should work.</para>
-
-<para>To build this manual and the man-pages you need the
-<command>xmllint</command> and <command>xsltproc</command> programs,
-which are part of the <literal>libxml2</literal> and
-<literal>libxslt</literal> packages, respectively.  You also need the
-<link
-xlink:href="http://docbook.sourceforge.net/projects/xsl/">DocBook XSL
-stylesheets</link> and optionally the <link
-xlink:href="http://www.docbook.org/schemas/5x"> DocBook 5.0 RELAX NG
-schemas</link>.  Note that these are only required if you modify the
-manual sources or when you are building from the Subversion
-repository.</para>
-
-<para>To build the parser, very <emphasis>recent</emphasis> versions
-of Bison and Flex are required.  (This is because Nix needs GLR
-support in Bison and reentrancy support in Flex.)  For Bison, you need
-version 2.3 or higher (1.875 does <emphasis>not</emphasis> work),
-which can be obtained from
-the <link xlink:href="ftp://alpha.gnu.org/pub/gnu/bison">GNU FTP
-server</link>.  For Flex, you need version 2.5.33, which is available
-on <link xlink:href="http://lex.sourceforge.net/">SourceForge</link>.
-Slightly older versions may also work, but ancient versions like the
-ubiquitous 2.5.4a won't.  Note that these are only required if you
-modify the parser or when you are building from the Subversion
-repository.</para>
-
-<para>Nix uses the bzip2 compressor (including the bzip2 library).  It
-is included in the Nix source distribution.  If you build from the
-Subversion repository, you must download it yourself and place it in
-the <filename>externals/</filename> directory.  See
-<filename>externals/Makefile.am</filename> for the precise URLs of
-this packages.  Alternatively, if you already have it installed, you
-can use <command>configure</command>'s <option>--with-bzip2</option>
-options to point to their respective locations.</para>
-
-<para>Nix can optionally use the <link
-xlink:href="http://www.hpl.hp.com/personal/Hans_Boehm/gc/">Boehm
-garbage collector</link> to reduce the evaluator’s memory consumption.
-To enable it, install <literal>pkgconfig</literal> and the Boehm
-garbage collector, and pass the flag <option>--enable-gc</option> to
-<command>configure</command>.</para>
-
-</section>
-
-
-<section><title>Building Nix from source</title>
-
-<para>After unpacking or checking out the Nix sources, issue the
-following commands:
-
-<screen>
+    <screen>
 $ ./configure <replaceable>options...</replaceable>
 $ make
 $ make install</screen>
 
-</para>
-
-<para>When building from the Subversion repository, these should be
-preceded by the command:
-
-<screen>
-$ ./bootstrap.sh</screen>
-
-</para>
-
-<para>The installation path can be specified by passing the
-<option>--prefix=<replaceable>prefix</replaceable></option> to
-<command>configure</command>.  The default installation directory is
-<filename>/usr/local</filename>.  You can change this to any location
-you like.  You must have write permission to the
-<replaceable>prefix</replaceable> path.</para>
-
-<para>Nix keeps its <emphasis>store</emphasis> (the place where
-packages are stored) in <filename>/nix/store</filename> by default.
-This can be changed using
-<option>--with-store-dir=<replaceable>path</replaceable></option>.</para>
-
-<warning><para>It is best <emphasis>not</emphasis> to change the Nix
-store from its default, since doing so makes it impossible to use
-pre-built binaries from the standard Nixpkgs channels — that is, all
-packages will need to be built from source.</para></warning>
-
-<para>Nix keeps state (such as its database and log files) in
-<filename>/nix/var</filename> by default.  This can be changed using
-<option>--localstatedir=<replaceable>path</replaceable></option>.</para>
-
-<para>If you want to rebuild the documentation, pass the full path to
-the DocBook RELAX NG schemas and to the DocBook XSL stylesheets using
-the
-<option>--with-docbook-rng=<replaceable>path</replaceable></option>
-and
-<option>--with-docbook-xsl=<replaceable>path</replaceable></option>
-options.</para>
-
-</section>
-
-
-<section><title>Installing a binary distribution</title>
-
-<para>RPM and Deb packages of Nix for a number of different versions
-of Fedora, openSUSE, Debian and Ubuntu can be downloaded from <link
-xlink:href="http://nixos.org/" />.  Once downloaded, the RPMs can be
-installed or upgraded using <command>rpm -U</command>.  For example,
-
-<screen>
-$ rpm -U nix-0.13pre18104-1.i386.rpm</screen>
-
-Likewise, for a Deb package:
-
-<screen>
-$ dpkg -i nix_0.13pre18104-1_amd64.deb</screen>
-
-</para>
-
-<para>Nix can be uninstalled using <command>rpm -e nix</command> or
-<command>dpkg -r nix</command>.  After this you should manually remove
-the Nix store and other auxiliary data, if desired:
-
-<screen>
-$ rm -rf /nix/store
-$ rm -rf /nix/var</screen>
-
-</para>
-
-</section>
-
-
-<!-- TODO: should be updated
-<section><title>Upgrading Nix through Nix</title>
-
-<para>You can install the latest stable version of Nix through Nix
-itself by subscribing to the channel <link
-xlink:href="http://nixos.org/releases/nix/channels/nix-stable" />,
-or the latest unstable version by subscribing to the channel <link
-xlink:href="http://nixos.org/releases/nix/channels/nix-unstable" />.
-You can also do a <link linkend="sec-one-click">one-click
-installation</link> by clicking on the package links at <link
-xlink:href="http://nixos.org/releases/full-index-nix.html" />.</para>
-
-</section>
--->
-
-
-<section><title>Security</title>
-
-<para>Nix has two basic security models.  First, it can be used in
-“single-user mode”, which is similar to what most other package
-management tools do: there is a single user (typically <systemitem
-class="username">root</systemitem>) who performs all package
-management operations.  All other users can then use the installed
-packages, but they cannot perform package management operations
-themselves.</para>
-
-<para>Alternatively, you can configure Nix in “multi-user mode”.  In
-this model, all users can perform package management operations — for
-instance, every user can install software without requiring root
-privileges.  Nix ensures that this is secure.  For instance, it’s not
-possible for one user to overwrite a package used by another user with
-a Trojan horse.</para>
-
-
-<section><title>Single-user mode</title>
-  
-<para>In single-user mode, all Nix operations that access the database
-in <filename><replaceable>prefix</replaceable>/var/nix/db</filename>
-or modify the Nix store in
-<filename><replaceable>prefix</replaceable>/store</filename> must be
-performed under the user ID that owns those directories.  This is
-typically <systemitem class="username">root</systemitem>.  (If you
-install from RPM packages, that’s in fact the default ownership.)
-However, on single-user machines, it is often convenient to
-<command>chown</command> those directories to your normal user account
-so that you don’t have to <command>su</command> to <systemitem
-class="username">root</systemitem> all the time.</para>
-
-</section>
-
-
-<section xml:id="ssec-multi-user"><title>Multi-user mode</title>
-
-<para>To allow a Nix store to be shared safely among multiple users,
-it is important that users are not able to run builders that modify
-the Nix store or database in arbitrary ways, or that interfere with
-builds started by other users.  If they could do so, they could
-install a Trojan horse in some package and compromise the accounts of
-other users.</para>
-
-<para>To prevent this, the Nix store and database are owned by some
-privileged user (usually <literal>root</literal>) and builders are
-executed under special user accounts (usually named
-<literal>nixbld1</literal>, <literal>nixbld2</literal>, etc.).  When a
-unprivileged user runs a Nix command, actions that operate on the Nix
-store (such as builds) are forwarded to a <emphasis>Nix
-daemon</emphasis> running under the owner of the Nix store/database
-that performs the operation.</para>
-
-<note><para>Multi-user mode has one important limitation: only
-<systemitem class="username">root</systemitem> can run <command
-linkend="sec-nix-pull">nix-pull</command> to register the availability
-of pre-built binaries.  However, those registrations are shared by all
-users, so they still get the benefit from <command>nix-pull</command>s
-done by <systemitem class="username">root</systemitem>.</para></note>
-
-
-<section><title>Setting up the build users</title>
-
-<para>The <emphasis>build users</emphasis> are the special UIDs under
-which builds are performed.  They should all be members of the
-<emphasis>build users group</emphasis> (usually called
-<literal>nixbld</literal>).  This group should have no other members.
-The build users should not be members of any other group.</para>
-
-<para>Here is a typical <filename>/etc/group</filename> definition of
-the build users group with 10 build users:
-
-<programlisting>
-nixbld:!:30000:nixbld1,nixbld2,nixbld3,nixbld4,nixbld5,nixbld6,nixbld7,nixbld8,nixbld9,nixbld10
-</programlisting>
-
-In this example the <literal>nixbld</literal> group has UID 30000, but
-of course it can be anything that doesn’t collide with an existing
-group.</para>
-
-<para>Here is the corresponding part of
-<filename>/etc/passwd</filename>:
-
-<programlisting>
-nixbld1:x:30001:65534:Nix build user 1:/var/empty:/noshell
-nixbld2:x:30002:65534:Nix build user 2:/var/empty:/noshell
-nixbld3:x:30003:65534:Nix build user 3:/var/empty:/noshell
-...
-nixbld10:x:30010:65534:Nix build user 10:/var/empty:/noshell
-</programlisting>
-
-The home directory of the build users should not exist or should be an
-empty directory to which they do not have write access.</para>
-
-<para>The build users should have write access to the Nix store, but
-they should not have the right to delete files.  Thus the Nix store’s
-group should be the build users group, and it should have the sticky
-bit turned on (like <filename>/tmp</filename>):
-
-<screen>
-$ chgrp nixbld /nix/store
-$ chmod 1777 /nix/store
-</screen>
-
-</para>
-
-<para>Finally, you should tell Nix to use the build users by
-specifying the build users group in the <link
-linkend="conf-build-users-group"><literal>build-users-group</literal>
-option</link> in the <link linkend="sec-conf-file">Nix configuration
-file</link> (<literal>/nix/etc/nix/nix.conf</literal>):
-
-<programlisting>
-build-users-group = nixbld
-</programlisting>
-
-</para>
-
-</section>
-
-
-<section><title>Nix store/database owned by root</title>
-
-<para>The simplest setup is to let <literal>root</literal> own the Nix
-store and database.  I.e.,
-
-<screen>
-$ chown -R root /nix/store /nix/var/nix</screen>
-
-</para>
-
-<para>The <link linkend="sec-nix-worker">Nix daemon</link> should be
-started as follows (as <literal>root</literal>):
-
-<screen>
-$ nix-worker --daemon</screen>
-
-You’ll want to put that line somewhere in your system’s boot
-scripts.</para>
-
-<para>To let unprivileged users use the daemon, they should set the
-<link linkend="envar-remote"><envar>NIX_REMOTE</envar> environment
-variable</link> to <literal>daemon</literal>.  So you should put a
-line like
-
-<programlisting>
-export NIX_REMOTE=daemon</programlisting>
-
-into the users’ login scripts.</para>
-
-</section>
-
-
-<section><title>Nix store/database not owned by root</title>
-
-<para>It is also possible to let the Nix store and database be owned
-by a non-root user, which should be more secure<footnote><para>Note
-however that even when the Nix daemon runs as root, not
-<emphasis>that</emphasis> much code is executed as root: Nix
-expression evaluation is performed by the calling (unprivileged) user,
-and builds are performed under the special build user accounts.  So
-only the code that accesses the database and starts builds is executed
-as <literal>root</literal>.</para></footnote>.  Typically, this user
-is a special account called <literal>nix</literal>, but it can be
-named anything.  It should own the Nix store and database:
-
-<screen>
-$ chown -R root /nix/store /nix/var/nix</screen>
-
-and of course <command>nix-worker --daemon</command> should be started
-under that user, e.g.,
-
-<screen>
-$ su - nix -c "exec /nix/bin/nix-worker --daemon"</screen>
-
-</para>
-
-<para>There is a catch, though: non-<literal>root</literal> users
-cannot start builds under the build user accounts, since the
-<function>setuid</function> system call is obviously privileged.  To
-allow a non-<literal>root</literal> Nix daemon to use the build user
-feature, it calls a setuid-root helper program,
-<command>nix-setuid-helper</command>.  This program is installed in
-<filename><replaceable>prefix</replaceable>/libexec/nix-setuid-helper</filename>.
-To set the permissions properly (Nix’s <command>make install</command>
-doesn’t do this, since we don’t want to ship setuid-root programs
-out-of-the-box):
-
-<screen>
-$ chown root.root /nix/libexec/nix-setuid-helper
-$ chmod 4755 /nix/libexec/nix-setuid-helper
-</screen>
-
-(This example assumes that the Nix binaries are installed in
-<filename>/nix</filename>.)</para>
-
-<para>Of course, the <command>nix-setuid-helper</command> command
-should not be usable by just anybody, since then anybody could run
-commands under the Nix build user accounts.  For that reason there is
-a configuration file <filename>/etc/nix-setuid.conf</filename> that
-restricts the use of the helper.  This file should be a text file
-containing precisely two lines, the first being the Nix daemon user
-and the second being the build users group, e.g.,
-
-<programlisting>
-nix
-nixbld
-</programlisting>
-
-The setuid-helper barfs if it is called by a user other than the one
-specified on the first line, or if it is asked to execute a build
-under a user who is not a member of the group specified on the second
-line.  The file <filename>/etc/nix-setuid.conf</filename> must be
-owned by root, and must not be group- or world-writable.  The
-setuid-helper barfs if this is not the case.</para>
-
-</section>
-
-
-<section><title>Restricting access</title>
-
-<para>To limit which users can perform Nix operations, you can use the
-permissions on the directory
-<filename>/nix/var/nix/daemon-socket</filename>.  For instance, if you
-want to restrict the use of Nix to the members of a group called
-<literal>nix-users</literal>, do
-
-<screen>
-$ chgrp nix-users /nix/var/nix/daemon-socket
-$ chmod ug=rwx,o= /nix/var/nix/daemon-socket
-</screen>
-
-This way, users who are not in the <literal>nix-users</literal> group
-cannot connect to the Unix domain socket
-<filename>/nix/var/nix/daemon-socket/socket</filename>, so they cannot
-perform Nix operations.</para>
-
-</section>
-
-
-</section> <!-- end of multi-user -->
-
-
-</section> <!-- end of security -->
-
-
-<section><title>Using Nix</title>
-
-<para>To use Nix, some environment variables should be set.  In
-particular, <envar>PATH</envar> should contain the directories
-<filename><replaceable>prefix</replaceable>/bin</filename> and
-<filename>~/.nix-profile/bin</filename>.  The first directory contains
-the Nix tools themselves, while <filename>~/.nix-profile</filename> is
-a symbolic link to the current <emphasis>user environment</emphasis>
-(an automatically generated package consisting of symlinks to
-installed packages).  The simplest way to set the required environment
-variables is to include the file
-<filename><replaceable>prefix</replaceable>/etc/profile.d/nix.sh</filename>
-in your <filename>~/.bashrc</filename> (or similar), like this:</para>
-
-<screen>
-source <replaceable>prefix</replaceable>/etc/profile.d/nix.sh</screen>
-
-</section>
-
+    <para>
+      When building from the Subversion repository, these should be preceded by
+      the command:
+    </para>
+
+    <screen>
+$ autoreconf -i</screen>
+
+    <para>
+      The installation path can be specified by passing the
+      <option>--prefix=<replaceable>prefix</replaceable></option> to
+      <command>configure</command>.  The default installation directory is
+      <filename>/nix</filename>.  You can change this to any location you like.
+      You must have write permission to the <replaceable>prefix</replaceable>
+      path.
+    </para>
+
+    <warning>
+      <para>
+        It is advisable <emphasis>not</emphasis> to change the installation
+        prefix from its default, since doing so will in all likelihood make it
+        impossible to use derivations built on other systems.
+      </para>
+    </warning>
+
+    <para>
+      If you want to rebuilt the documentation, pass the full path to the
+      DocBook XML catalog file (<filename>docbook.cat</filename>) and to the
+      DocBook XSL stylesheets using the
+      <option>--with-docbook-catalog=<replaceable>path</replaceable></option>
+      and <option>--with-docbook-xsl=<replaceable>path</replaceable></option>
+      options.
+    </para>
+
+  </sect1>
+
+
+  <sect1>
+    <title>Installing from RPMs</title>
+
+    <para>
+      RPM packages of Nix can be downloaded from <ulink
+      url='http://www.cs.uu.nl/groups/ST/Trace/Nix' />.  These RPMs
+      should work for most fairly recent releases of SuSE and Red Hat
+      Linux.  They have been known to work work on SuSE Linux 8.1 and
+      9.0, and Red Hat 9.0.  In fact, it should work on any RPM-based
+      Linux distribution based on <literal>glibc</literal> 2.3 or
+      later.
+    </para>
+
+    <para>
+      Once downloaded, the RPMs can be installed or upgraded using
+      <command>rpm -U</command>.  For example,
+    </para>
+
+    <screen>
+rpm -U nix-0.5pre664-1.i386.rpm</screen>
+
+    <para>
+      The RPMs install into the directory <filename>/nix</filename>.
+      Nix can be uninstalled using <command>rpm -e nix</command>.
+      After this it will be necessary to manually remove the Nix store
+      and other auxiliary data:
+    </para>
+
+    <screen>
+rm -rf /nix/store
+rm -rf /nix/var</screen>
+
+  </sect1>
+
+  <sect1>
+    <title>Permissions</title>
+
+    <para>
+      All Nix operations must be performed under the user ID that owns
+      the Nix store and database
+      (<filename><replaceable>prefix</replaceable>/store</filename>
+      and
+      <filename><replaceable>prefix</replaceable>/var/nix/db</filename>,
+      respectively).  When installed from the RPM packages, these
+      directories are owned by <systemitem
+      class='username'>root</systemitem>.
+    </para>
+
+  </sect1>
+
+  <sect1>
+    <title>Using Nix</title>
+
+    <para>
+      To use Nix, some environment variables should be set.  In
+      particular, <envar>PATH</envar> should contain the directories
+      <filename><replaceable>prefix</replaceable>/bin</filename> and
+      <filename>~/.nix-profile/bin</filename>.  The first directory
+      contains the Nix tools themselves, while
+      <filename>~/.nix-profile</filename> is a symbolic link to the
+      current <emphasis>user environment</emphasis> (an automatically
+      generated package consisting of symlinks to installed packages).
+      The simplest way to set the required environment variables is to
+      include the file
+      <filename><replaceable>prefix</replaceable>/etc/profile.d/nix.sh</filename>
+      in your <filename>~/.bashrc</filename> (or similar), like this:
+    </para>
+
+    <screen>
+. <replaceable>prefix</replaceable>/etc/profile.d/nix.sh</screen>
+
+  </sect1>
 
 </chapter>

doc/manual/introduction.xml

@@ -1,337 +1,93 @@
-<chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id="chap-introduction">
-
-<title>Introduction</title>
-
-
-<section><title>About Nix</title>
-
-<para>Nix is a <emphasis>purely functional package manager</emphasis>.
-This means that it treats packages like values in purely functional
-programming languages such as Haskell — they are built by functions
-that don’t have side-effects, and they never change after they have
-been built.  Nix stores packages in the <emphasis>Nix
-store</emphasis>, usually the directory
-<filename>/nix/store</filename>, where each package has its own unique
-subdirectory such as
-
-<programlisting>
-/nix/store/r8vvq9kq18pz08v249h8my6r9vs7s0n3-firefox-2.0.0.1/
-</programlisting>
-
-where <literal>r8vvq9kq…</literal> is a unique identifier for the
-package that captures all its dependencies (it’s a cryptographic hash
-of the package’s build dependency graph).  This enables many powerful
-features.</para>
-
-
-<simplesect><title>Multiple versions</title>
-
-<para>You can have multiple versions or variants of a package
-installed at the same time.  This is especially important when
-different applications have dependencies on different versions of the
-same package — it prevents the “DLL hell”.  Because of the hashing
-scheme, different versions of a package end up in different paths in
-the Nix store, so they don’t interfere with each other.</para>
-
-<para>An important consequence is that operations like upgrading or
-uninstalling an application cannot break other applications, since
-these operations never “destructively” update or delete files that are
-used by other packages.</para>
-
-</simplesect>
-
-
-<simplesect><title>Complete dependencies</title>
-
-<para>Nix helps you make sure that package dependency specifications
-are complete.  In general, when you’re making a package for a package
-management system like RPM, you have to specify for each package what
-its dependencies are, but there are no guarantees that this
-specification is complete.  If you forget a dependency, then the
-package will build and work correctly on <emphasis>your</emphasis>
-machine if you have the dependency installed, but not on the end
-user's machine if it's not there.</para>
-
-<para>Since Nix on the other hand doesn’t install packages in “global”
-locations like <filename>/usr/bin</filename> but in package-specific
-directories, the risk of incomplete dependencies is greatly reduced.
-This is because tools such as compilers don’t search in per-packages
-directories such as
-<filename>/nix/store/5lbfaxb722zp…-openssl-0.9.8d/include</filename>,
-so if a package builds correctly on your system, this is because you
-specified the dependency explicitly.</para>
-
-<para>Runtime dependencies are found by scanning binaries for the hash
-parts of Nix store paths (such as <literal>r8vvq9kq…</literal>).  This
-sounds risky, but it works extremely well.</para>
-
-</simplesect>
-
-
-<simplesect><title>Multi-user support</title>
-
-<para>Starting at version 0.11, Nix has multi-user support.  This
-means that non-privileged users can securely install software.  Each
-user can have a different <emphasis>profile</emphasis>, a set of
-packages in the Nix store that appear in the user’s
-<envar>PATH</envar>.  If a user installs a package that another user
-has already installed previously, the package won’t be built or
-downloaded a second time.  At the same time, it is not possible for
-one user to inject a Trojan horse into a package that might be used by
-another user.</para>
-
-<!--
-<para>More details can be found in Section 3 of our <a
-href="docs/papers.html#securesharing">ASE 2005 paper</a>.</para>
--->
-
-</simplesect>
-
-
-<simplesect><title>Atomic upgrades and rollbacks</title>
-
-<para>Since package management operations never overwrite packages in
-the Nix store but just add new versions in different paths, they are
-<emphasis>atomic</emphasis>.  So during a package upgrade, there is no
-time window in which the package has some files from the old version
-and some files from the new version — which would be bad because a
-program might well crash if it’s started during that period.</para>
-
-<para>And since package aren’t overwritten, the old versions are still
-there after an upgrade.  This means that you can <emphasis>roll
-back</emphasis> to the old version:</para>
-
-<screen>
-$ nix-env --upgrade <replaceable>some-packages</replaceable>
-$ nix-env --rollback
-</screen>
-
-</simplesect>
-
-
-<simplesect><title>Garbage collection</title>
-
-<para>When you uninstall a package like this…
-
-<screen>
-$ nix-env --uninstall firefox
-</screen>
-
-the package isn’t deleted from the system right away (after all, you
-might want to do a rollback, or it might be in the profiles of other
-users).  Instead, unused packages can be deleted safely by running the
-<emphasis>garbage collector</emphasis>:
-
-<screen>
-$ nix-collect-garbage
-</screen>
-
-This deletes all packages that aren’t in use by any user profile or by
-a currently running program.</para>
-
-</simplesect>
-
-
-<simplesect><title>Functional package language</title>
-
-<para>Packages are built from <emphasis>Nix expressions</emphasis>,
-which is a simple functional language.  A Nix expression describes
-everything that goes into a package build action (a “derivation”):
-other packages, sources, the build script, environment variables for
-the build script, etc.  Nix tries very hard to ensure that Nix
-expressions are <emphasis>deterministic</emphasis>: building a Nix
-expression twice should yield the same result.</para>
-
-<para>Because it’s a functional language, it’s easy to support
-building variants of a package: turn the Nix expression into a
-function and call it any number of times with the appropriate
-arguments.  Due to the hashing scheme, variants don’t conflict with
-each other in the Nix store.</para>
-
-</simplesect>
-
-
-<simplesect><title>Transparent source/binary deployment</title>
-
-<para>Nix expressions generally describe how to build a package from
-source, so an installation action like
-
-<screen>
-$ nix-env --install firefox
-</screen>
-
-<emphasis>could</emphasis> cause quite a bit of build activity, as not
-only Firefox but also all its dependencies (all the way up to the C
-library and the compiler) would have to built, at least if they are
-not already in the Nix store.  This is a <emphasis>source deployment
-model</emphasis>.  For most users, building from source is not very
-pleasant as it takes far too long.  However, Nix can automatically
-skip building from source and download a pre-built binary instead if
-it knows about it.  <emphasis>Nix channels</emphasis> provide Nix
-expressions along with pre-built binaries.</para>
-
-<!--
-<para>source deployment model (like <a
-href="http://www.gentoo.org/">Gentoo</a>) and a binary model (like
-RPM)</para>
--->
-
-</simplesect>
-
-
-<simplesect><title>Binary patching</title>
-
-<para>In addition to downloading binaries automatically if they’re
-available, Nix can download binary deltas that patch an existing
-package in the Nix store into a new version.  This speeds up
-upgrades.</para>
-
-</simplesect>
-
-
-<simplesect><title>Nix Packages collection</title>
-
-<para>We provide a large set of Nix expressions containing hundreds of
-existing Unix packages, the <emphasis>Nix Packages
-collection</emphasis> (Nixpkgs).</para>
-
-</simplesect>
-
-
-<simplesect><title>Service deployment</title>
-
-<para>Nix can be used not only for rolling out packages, but also
-complete <emphasis>configurations</emphasis> of services.  This is
-done by treating all the static bits of a service (such as software
-packages, configuration files, control scripts, static web pages,
-etc.) as “packages” that can be built by Nix expressions.  As a
-result, all the features above apply to services as well: for
-instance, you can roll back a web server configuration if a
-configuration change turns out to be undesirable, you can easily have
-multiple instances of a service (e.g., a test and production server),
-and because the whole service is built in a purely functional way from
-a Nix expression, it is repeatable so you can easily reproduce the
-service on another machine.</para>
-
-<!--
-<para>You can read more about this in our <a
-href="docs/papers.html#servicecm">SCM-12 paper</a>.</para>
--->
-
-</simplesect>
-
-
-<simplesect><title>Portability</title>
-
-<para>Nix should run on most Unix systems, including Linux, FreeBSD and
-Mac OS X.  It is also supported on Windows using Cygwin.</para>
-
-</simplesect>
-
-
-<simplesect><title>NixOS</title>
-
-<para>NixOS is a Linux distribution based on Nix.  It uses Nix not
-just for package management but also to manage the system
-configuration (e.g., to build configuration files in
-<filename>/etc</filename>).  This means, among other things, that it’s
-possible to easily roll back the entire configuration of the system to
-an earlier state.  Also, users can install software without root
-privileges.  For more information and downloads, see the <link
-xlink:href="http://nixos.org/">NixOS homepage</link>.</para>
-
-</simplesect>
-
-
-<!-- other features:
-
-- build farms
-- reproducibility (Nix expressions allows whole configuration to be rebuilt)
-
--->
-
-</section>
-
-
-<section><title>About us</title>
-
-<para>Nix was originally developed at the <link
-xlink:href="http://www.cs.uu.nl/">Department of Information and
-Computing Sciences</link>, Utrecht University by the <link
-xlink:href="http://www.cs.uu.nl/wiki/Trace/WebHome">TraCE
-project</link> (2003-2008).  The project was funded by the Software
-Engineering Research Program <link
-xlink:href="http://www.jacquard.nl/">Jacquard</link> to improve the
-support for variability in software systems.  Further funding is now
-provided by the NIRICT LaQuSo Build Farm project.</para>
-
-</section>
-
-
-<section><title>About this manual</title>
-
-<para>This manual tells you how to install and use Nix and how to
-write Nix expressions for software not already in the Nix Packages
-collection.  It also discusses some advanced topics, such as setting
-up a Nix-based build farm.</para>
-
-</section>
-
-
-<section><title>License</title>
-
-<para>Nix is free software; you can redistribute it and/or modify it
-under the terms of the <link
-xlink:href="http://www.gnu.org/licenses/lgpl.html">GNU Lesser General
-Public License</link> as published by the <link
-xlink:href="http://www.fsf.org/">Free Software Foundation</link>;
-either version 2.1 of the License, or (at your option) any later
-version.  Nix is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Lesser General Public License for more details.</para>
-
-</section>
-
-
-<section><title>More information</title>
-
-<para>Some background information on Nix can be found in a number of
-papers.  The ICSE 2004 paper <citetitle
-xlink:href='http://www.st.ewi.tudelft.nl/~dolstra/pubs/immdsd-icse2004-final.pdf'>Imposing
-a Memory Management Discipline on Software Deployment</citetitle>
-discusses the hashing mechanism used to ensure reliable dependency
-identification and non-interference between different versions and
-variants of packages.  The LISA 2004 paper <citetitle
-xlink:href='http://www.st.ewi.tudelft.nl/~dolstra/pubs/nspfssd-lisa2004-final.pdf'>Nix:
-A Safe and Policy-Free System for Software Deployment</citetitle>
-gives a more general discussion of Nix from a system-administration
-perspective.  The CBSE 2005 paper <citetitle
-xlink:href='http://www.st.ewi.tudelft.nl/~dolstra/pubs/eupfcdm-cbse2005-final.pdf'>Efficient
-Upgrading in a Purely Functional Component Deployment Model
-</citetitle> is about transparent patch deployment in Nix.  The SCM-12
-paper <citetitle
-xlink:href='http://www.st.ewi.tudelft.nl/~dolstra/pubs/servicecm-scm12-final.pdf'>
-Service Configuration Management</citetitle> shows how services (e.g.,
-web servers) can be deployed and managed through Nix.  A short
-overview of NixOS is given in the HotOS XI paper <citetitle
-xlink:href="http://www.st.ewi.tudelft.nl/~dolstra/pubs/hotos-final.pdf">Purely
-Functional System Configuration Management</citetitle>.  The Nix
-homepage has <link
-xlink:href="http://nixos.org/docs/papers.html">an up-to-date list
-of Nix-related papers</link>.</para>
-
-<para>Nix is the subject of Eelco Dolstra’s PhD thesis <citetitle
-xlink:href="http://igitur-archive.library.uu.nl/dissertations/2006-0118-200031/index.htm">The
-Purely Functional Software Deployment Model</citetitle>, which
-contains most of the papers listed above.</para>
-
-<para>Nix has a homepage at <link
-xlink:href="http://nixos.org/"/>.</para>
-
-</section>
-
+<chapter>
+  <title>Introduction</title>
+
+  <epigraph>
+    <para><quote>The number of Nix installations in the world has grown to 5,
+        with more expected.</quote></para>
+  </epigraph>
+
+  <para>
+    Nix is a system for software deployment.  It supports the
+    creation and distribution of software packages, as well as the installation
+    and subsequent management of these on target machines (i.e., it is also a
+    package manager).
+  </para>
+
+  <para>
+    Nix solves some large problems that exist in most current deployment and
+    package management systems.  <emphasis>Dependency determination</emphasis>
+    is a big one: the correct installation of a software component requires
+    that all dependencies of that component (i.e., other components used by it)
+    are also installed.  Most systems have no way to verify that the specified
+    dependencies of a component are actually sufficient.
+  </para>
+
+  <para>
+    Another big problem is the lack of support for concurrent availability of
+    multiple <emphasis>variants</emphasis> of a component.  It must be possible
+    to have several versions of a component installed at the same time, or
+    several instances of the same version built with different parameters.
+    Unfortunately, components are in general not properly isolated from each
+    other.  For instance, upgrading a component that is a dependency for some
+    other component might break the latter.
+  </para>
+
+  <para>
+    Nix solves these problems by building and storing packages in paths that
+    are infeasible to predict in advance.  For example, the artifacts of a
+    package <literal>X</literal> might be stored in
+    <filename>/nix/store/d58a0606ed616820de291d594602665d-X</filename>, rather
+    than in, say, <filename>/usr/lib</filename>.  The path component
+    <filename>d58a...</filename> is actually a cryptographic hash of all the
+    inputs (i.e., sources, requisites, and build flags) used in building
+    <literal>X</literal>, and as such is very fragile: any change to the inputs
+    will change the hash.  Therefore it is not sensible to
+    <emphasis>hard-code</emphasis> such a path into the build scripts of a
+    package <literal>Y</literal> that uses <literal>X</literal> (as does happen
+    with <quote>fixed</quote> paths such as <filename>/usr/lib</filename>).
+    Rather, the build script of package <literal>Y</literal> is parameterised
+    with the actual location of <literal>X</literal>, which is supplied by the
+    Nix system.
+  </para>
+
+  <para>
+    As stated above, the path name of a file system object contain a
+    cryptographic hash of all inputs involved in building it.  A change to any
+    of the inputs will cause the hash to change--and by extension, the path
+    name.  These inputs include both sources (variation in time) and
+    configuration options (variation in space).  Therefore variants of the same
+    package don't clash---they can co-exist peacefully within the same file
+    system.
+  </para>
+
+  <para>
+    Other features:
+  </para>
+
+  <para>
+    <emphasis>Transparent source/binary deployment.</emphasis>
+  </para>
+
+  <para>
+    <emphasis>Unambiguous identification of configuration.</emphasis>
+  </para>
+
+  <para>
+    <emphasis>Automatic storage management.</emphasis>
+  </para>
+
+  <para>
+    <emphasis>Atomic upgrades and rollbacks.</emphasis>
+  </para>
+
+  <para>
+    <emphasis>Support for many simultaneous configurations.</emphasis>
+  </para>
+
+  <para>
+    <emphasis>Portability.</emphasis>  Nix is quite portable.  Contrary to
+    build systems like those in, e.g., Vesta and ClearCase, it does not rely on
+    operating system extensions.
+  </para>
 
 </chapter>

doc/manual/manual.xml

@@ -1,86 +1,86 @@
-<book xmlns="http://docbook.org/ns/docbook"
-      xmlns:xi="http://www.w3.org/2001/XInclude">
+<?xml version="1.0"?>
+<!DOCTYPE book
+    PUBLIC "-//OASIS//DTD DocBook EBNF Module V1.0//EN"
+    "http://www.oasis-open.org/docbook/xml/ebnf/1.0/dbebnf.dtd"
+[
+<!-- <!DOCTYPE book
+    PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
+    "http://www.docbook.org/xml/4.3/docbook-xml-4.3.zip" -->
+<!ENTITY introduction SYSTEM "introduction.xml">
+<!ENTITY quick-start SYSTEM "quick-start.xml">
+<!ENTITY installation SYSTEM "installation.xml">
+<!ENTITY overview SYSTEM "overview.xml">
+<!ENTITY opt-common SYSTEM "opt-common.xml">
+<!ENTITY opt-common-syn SYSTEM "opt-common-syn.xml">
+<!ENTITY nix-env SYSTEM "nix-env.xml">
+<!ENTITY nix-store SYSTEM "nix-store.xml">
+<!ENTITY nix-instantiate SYSTEM "nix-instantiate.xml">
+<!ENTITY nix-collect-garbage SYSTEM "nix-collect-garbage.xml">
+<!ENTITY nix-push SYSTEM "nix-push.xml">
+<!ENTITY nix-pull SYSTEM "nix-pull.xml">
+<!ENTITY nix-prefetch-url SYSTEM "nix-prefetch-url.xml">
+<!ENTITY nix-lang-ref SYSTEM "nix-lang-ref.xml">
+<!ENTITY troubleshooting SYSTEM "troubleshooting.xml">
+<!ENTITY bugs SYSTEM "bugs.xml">
+<!ENTITY version SYSTEM "version.xml">
+]>
 
-  <info>
-
-    <title>Nix User's Guide</title>
-
-    <subtitle>Draft (Version <xi:include href="version.txt"
-    parse="text" />)</subtitle>
+<book>
+  <title>Nix: A System for Software Deployment</title>
 
+  <subtitle>Draft (Version &version;)</subtitle>
+  
+  <bookinfo>
     <author>
-      <personname>
-        <firstname>Eelco</firstname>
-        <surname>Dolstra</surname>
-      </personname>
-      <affiliation>
-        <orgname>Delft University of Technology</orgname>
-        <orgdiv>Department of Software Technology</orgdiv>
-      </affiliation>
-      <contrib>Author</contrib>
+      <firstname>Eelco</firstname>
+      <surname>Dolstra</surname>
     </author>
-
     <copyright>
       <year>2004</year>
-      <year>2005</year>
-      <year>2006</year>
-      <year>2007</year>
-      <year>2008</year>
-      <year>2009</year>
-      <year>2010</year>
       <holder>Eelco Dolstra</holder>
     </copyright>
+  </bookinfo>
 
-    <date>August 2010</date>
-    
-  </info>
-
-  
-  <xi:include href="introduction.xml" />
-  <xi:include href="quick-start.xml" />
-  <xi:include href="installation.xml" />
-  <xi:include href="package-management.xml" />
-  <xi:include href="writing-nix-expressions.xml" />
-  <xi:include href="build-farm.xml" />
-
+  &introduction;
+  &quick-start;
+  &installation;
+  &overview;
 
   <appendix>
     <title>Command Reference</title>
-    <xi:include href="opt-common.xml" />
-    <xi:include href="env-common.xml" />
-    <xi:include href="conf-file.xml" />
-    
-    <section>
-      <title>Main commands</title>
-      <xi:include href="nix-env.xml" />
-      <xi:include href="nix-instantiate.xml" />
-      <xi:include href="nix-store.xml" />
-    </section>
-    
-    <section>
-      <title>Utilities</title>
-      <xi:include href="nix-build.xml" />
-      <xi:include href="nix-channel.xml" />
-      <xi:include href="nix-collect-garbage.xml" />
-      <xi:include href="nix-copy-closure.xml" />
-      <xi:include href="nix-hash.xml" />
-      <xi:include href="nix-install-package.xml" />
-      <xi:include href="nix-prefetch-url.xml" />
-      <xi:include href="nix-pull.xml" />
-      <xi:include href="nix-push.xml" />
-      <xi:include href="nix-worker.xml" />
-    </section>
-
+    <sect1>
+      <title>nix-env</title>
+      &nix-env;
+    </sect1>
+    <sect1>
+      <title>nix-store</title>
+      &nix-store;
+    </sect1>
+    <sect1>
+      <title>nix-instantiate</title>
+      &nix-instantiate;
+    </sect1>
+    <sect1>
+      <title>nix-collect-garbage</title>
+      &nix-collect-garbage;
+    </sect1>
+    <sect1>
+      <title>nix-push</title>
+      &nix-push;
+    </sect1>
+    <sect1>
+      <title>nix-pull</title>
+      &nix-pull;
+    </sect1>
+    <sect1>
+      <title>nix-prefetch-url</title>
+      &nix-prefetch-url;
+    </sect1>
   </appendix>
 
-  <xi:include href="troubleshooting.xml" />
-  <!-- <xi:include href="bugs.xml" /> -->
-  <xi:include href="glossary.xml" />
+  &nix-lang-ref;
+
+  &troubleshooting;
+  &bugs;
 
-  <appendix>
-    <title>Nix Release Notes</title>
-    <xi:include href="release-notes.xml"
-                xpointer="xmlns(x=http://docbook.org/ns/docbook)xpointer(x:article/x:section)" />
-  </appendix>
-    
 </book>

doc/manual/nix-build.xml

@@ -1,146 +0,0 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-build">
-
-<refmeta>
-  <refentrytitle>nix-build</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>nix-build</refname>
-  <refpurpose>build a Nix expression</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-build</command>
-    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xmlns(db=http://docbook.org/ns/docbook)xpointer(/db:nop/*)" />
-    <arg><option>--arg</option> <replaceable>name</replaceable> <replaceable>value</replaceable></arg>
-    <arg><option>--argstr</option> <replaceable>name</replaceable> <replaceable>value</replaceable></arg>
-    <arg>
-      <group choice='req'>
-        <arg choice='plain'><option>--attr</option></arg>
-        <arg choice='plain'><option>-A</option></arg>
-      </group>
-      <replaceable>attrPath</replaceable>
-    </arg>
-    <arg><option>--add-drv-link</option></arg>
-    <arg><option>--drv-link </option><replaceable>drvlink</replaceable></arg>
-    <arg><option>--no-out-link</option></arg>
-    <arg>
-      <group choice='req'>
-        <arg choice='plain'><option>--out-link</option></arg>
-        <arg choice='plain'><option>-o</option></arg>
-      </group>
-      <replaceable>outlink</replaceable>
-    </arg>
-    <arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg>
-  </cmdsynopsis>
-</refsynopsisdiv>
-
-<refsection><title>Description</title>
-
-<para>The <command>nix-build</command> command builds the derivations
-described by the Nix expressions in <replaceable>paths</replaceable>.
-If the build succeeds, it places a symlink to the result in the
-current directory.  The symlink is called <filename>result</filename>.
-If there are multiple Nix expressions, or the Nix expressions evaluate
-to multiple derivations, multiple sequentially numbered symlinks are
-created (<filename>result</filename>, <filename>result-2</filename>,
-and so on).</para>
-
-<para>If no <replaceable>paths</replaceable> are specified, then
-<command>nix-build</command> will use <filename>default.nix</filename>
-in the current directory, if it exists.</para>
-
-<para><command>nix-build</command> is essentially a wrapper around
-<link
-linkend="sec-nix-instantiate"><command>nix-instantiate</command></link>
-(to translate a high-level Nix expression to a low-level store
-derivation) and <link
-linkend="rsec-nix-store-realise"><command>nix-store
---realise</command></link> (to build the store derivation).</para>
-
-<warning><para>The result of the build is automatically registered as
-a root of the Nix garbage collector.  This root disappears
-automatically when the <filename>result</filename> symlink is deleted
-or renamed.  So don’t rename the symlink.</para></warning>
-
-</refsection>
-
-
-<refsection><title>Options</title>
-
-<para>See also <xref linkend="sec-common-options" />.  All options not
-listed here are passed to <command>nix-store --realise</command>,
-except for <option>--arg</option> and <option>--attr</option> /
-<option>-A</option> which are passed to
-<command>nix-instantiate</command>.</para>
-
-<variablelist>
-
-  <varlistentry><term><option>--add-drv-link</option></term>
-  
-    <listitem><para>Add a symlink in the current directory to the
-    store derivation produced by <command>nix-instantiate</command>.
-    The symlink is called <filename>derivation</filename> (which is
-    numbered in the case of multiple derivations).  The derivation is
-    a root of the garbage collector until the symlink is deleted or
-    renamed.</para></listitem>
-    
-  </varlistentry>
-
-  <varlistentry><term><option>--drv-link</option> <replaceable>drvlink</replaceable></term>
-  
-    <listitem><para>Change the name of the symlink to the derivation
-    created when <option>--add-drv-link</option> is used from
-    <filename>derivation</filename> to
-    <replaceable>drvlink</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--no-out-link</option></term>
-  
-    <listitem><para>Do not create a symlink to the output path.  Note
-    that as a result the output does not become a root of the garbage
-    collector, and so might be deleted by <command>nix-store
-    --gc</command>.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry xml:id='opt-out-link'><term><option>--out-link</option> /
-  <option>-o</option> <replaceable>outlink</replaceable></term>
-  
-    <listitem><para>Change the name of the symlink to the output path
-    created unless <option>--no-out-link</option> is used from
-    <filename>result</filename> to
-    <replaceable>outlink</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-</variablelist>
-
-</refsection>
-
-
-<refsection><title>Examples</title>
-
-<screen>
-$ nix-build pkgs/top-level/all-packages.nix -A firefox
-store derivation is /nix/store/qybprl8sz2lc...-firefox-1.5.0.7.drv
-/nix/store/d18hyl92g30l...-firefox-1.5.0.7
-
-$ ls -l result
-lrwxrwxrwx  <replaceable>...</replaceable>  result -> /nix/store/d18hyl92g30l...-firefox-1.5.0.7
-
-$ ls ./result/bin/
-firefox  firefox-config</screen>
-
-</refsection>
-
-
-</refentry>

doc/manual/nix-channel.xml

@@ -1,93 +0,0 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-channel">
-  
-<refmeta>
-  <refentrytitle>nix-channel</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>nix-channel</refname>
-  <refpurpose>manage Nix channels</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-channel</command>
-    <group choice='req'>
-      <arg choice='plain'><option>--add</option> <replaceable>url</replaceable></arg>
-      <arg choice='plain'><option>--remove</option> <replaceable>url</replaceable></arg>
-      <arg choice='plain'><option>--list</option></arg>
-      <arg choice='plain'><option>--update</option></arg>
-    </group>
-  </cmdsynopsis>
-</refsynopsisdiv>
-
-<refsection><title>Description</title>
-
-<para>A Nix channel is mechanism that allows you to automatically stay
-up-to-date with a set of pre-built Nix expressions.  A Nix channel is
-just a URL that points to a place that contains a set of Nix
-expressions, as well as a <command>nix-push</command> manifest.  See
-also <xref linkend="sec-channels" />.</para>
-
-<para>This command has the following operations:
-
-<variablelist>
-
-  <varlistentry><term><option>--add</option> <replaceable>url</replaceable></term>
-
-    <listitem><para>Adds <replaceable>url</replaceable> to the list of
-    subscribed channels.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--remove</option> <replaceable>url</replaceable></term>
-
-    <listitem><para>Removes <replaceable>url</replaceable> from the
-    list of subscribed channels.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--list</option></term>
-
-    <listitem><para>Prints the URLs of all subscribed channels on
-    standard output.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--update</option></term>
-
-    <listitem><para>Downloads the Nix expressions of all subscribed
-    channels, makes them the default for <command>nix-env</command>
-    operations (by symlinking them in the directory
-    <filename>~/.nix-defexpr</filename>), and performs a
-    <command>nix-pull</command> on the manifests of all channels to
-    make pre-built binaries available.</para></listitem>
-
-  </varlistentry>
-
-</variablelist>
-
-</para>
-
-<para>Note that <option>--add</option> and <option>--remove</option>
-do not automatically perform an update.</para>
-
-<para>The list of subscribed channels is stored in
-<filename>~/.nix-channels</filename>.</para>
-
-<para>A channel consists of two elements: a bzipped Tar archive
-containing the Nix expressions, and a manifest created by
-<command>nix-push</command>.  These must be stored under
-<literal><replaceable>url</replaceable>/nixexprs.tar.bz2</literal> and
-<literal><replaceable>url</replaceable>/MANIFEST</literal>,
-respectively.</para>
-
-</refsection>
-
-</refentry>

doc/manual/nix-collect-garbage.xml

@@ -1,59 +1,75 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-collect-garbage">
-  
-<refmeta>
-  <refentrytitle>nix-collect-garbage</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
+<refentry>
+  <refnamediv>
+    <refname>nix-collect-garbage</refname>
+    <refpurpose>determine the set of unreachable store paths</refpurpose>
+  </refnamediv>
 
-<refnamediv>
-  <refname>nix-collect-garbage</refname>
-  <refpurpose>delete unreachable store paths</refpurpose>
-</refnamediv>
+  <refsynopsisdiv>
+    <cmdsynopsis>
+      <command>nix-collect-garbage</command>
+      <arg><option>--invert</option></arg>
+      <arg><option>--no-successors</option></arg>
+    </cmdsynopsis>
+  </refsynopsisdiv>
 
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-collect-garbage</command>
-    <arg><option>--delete-old</option></arg>
-    <arg><option>-d</option></arg>
-    <group choice='opt'>
-      <arg choice='plain'><option>--print-roots</option></arg>
-      <arg choice='plain'><option>--print-live</option></arg>
-      <arg choice='plain'><option>--print-dead</option></arg>
-      <arg choice='plain'><option>--delete</option></arg>
-    </group>
-  </cmdsynopsis>
-</refsynopsisdiv>
+  <refsection>
+    <title>Description</title>
 
-<refsection><title>Description</title>
+    <para>
+      The command <command>nix-collect-garbage</command> determines
+      the paths in the Nix store that are garbage, that is, not
+      reachable from outside of the store.  These paths can be safely
+      deleted without affecting the integrity of the system.
+    </para>
 
-<para>The command <command>nix-collect-garbage</command> is mostly an
-alias of <link linkend="rsec-nix-store-gc"><command>nix-store
---gc</command></link>, that is, it deletes all unreachable paths in
-the Nix store to clean up your system.  However, it provides an
-additional option <option>-d</option> (<option>--delete-old</option>)
-that deletes all old generations of all profiles in
-<filename>/nix/var/nix/profiles</filename> by invoking
-<literal>nix-env --delete-generations old</literal> on all profiles.
-Of course, this makes rollbacks to previous configurations
-impossible.</para>
+  </refsection>
 
-</refsection>
+  <refsection>
+    <title>Options</title>
 
-<refsection><title>Example</title>
+    <variablelist>
 
-<para>To delete from the Nix store everything that is not used by the
-current generations of each profile, do
+      <varlistentry>
+        <term><option>--invert</option></term>
+        <listitem>
+          <para>
+            Causes the set of <emphasis>reachable</emphasis> paths to
+            be printed, rather than the unreachable paths.  These are
+            the paths that may <emphasis>not</emphasis> be deleted.
+          </para>
+        </listitem>
+      </varlistentry>
+      
+      <varlistentry>
+        <term><option>--no-successors</option></term>
+        <listitem>
+          <para>
+            Causes <command>nix-collect-garbage</command> not to
+            follow successor relations.  By default, if a derivation
+            store expression is reachable, its successor (i.e., a
+            closure store expression) is also considered to be
+            reachable.  This option is always safe, but garbage
+            collecting successors may cause undesirable rebuilds later
+            on.
+          </para>
+        </listitem>
+      </varlistentry>
+      
+    </variablelist>
 
-<screen>
-$ nix-collect-garbage -d</screen>
+  </refsection>
 
-</para>
+  <refsection>
+    <title>Examples</title>
 
-</refsection>
+    <para>
+      To delete all unreachable paths, do the following:
+    
+      <screen>
+$ nix-collect-garbage | xargs nix-store --delete</screen>
 
+    </para>
+
+  </refsection>
+    
 </refentry>

doc/manual/nix-copy-closure.xml

@@ -1,152 +0,0 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-copy-closure">
-
-<refmeta>
-  <refentrytitle>nix-copy-closure</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>nix-copy-closure</refname>
-  <refpurpose>copy a closure to or from a remote machine via SSH</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-copy-closure</command>
-    <group>
-      <arg choice='plain'><option>--to</option></arg>
-      <arg choice='plain'><option>--from</option></arg>
-    </group>
-    <arg><option>--sign</option></arg>
-    <arg><option>--gzip</option></arg>
-    <arg choice='plain'>
-      <arg><replaceable>user@</replaceable></arg><replaceable>machine</replaceable>
-    </arg>
-    <arg choice='plain'><replaceable>paths</replaceable></arg>
-  </cmdsynopsis>
-</refsynopsisdiv>
-
-
-<refsection><title>Description</title>
-
-<para><command>nix-copy-closure</command> gives you an easy and
-efficient way to exchange software between machines.  Given one or
-more Nix store paths <replaceable>paths</replaceable> on the local
-machine, <command>nix-copy-closure</command> computes the closure of
-those paths (i.e. all their dependencies in the Nix store), and copies
-all paths in the closure to the remote machine via the
-<command>ssh</command> (Secure Shell) command.  With the
-<option>--from</option>, the direction is reversed:
-the closure of <replaceable>paths</replaceable> on a remote machine is
-copied to the Nix store on the local machine.</para>
-
-<para>This command is efficient because it only sends the store paths
-that are missing on the target machine.</para>
-
-<para>Since <command>nix-copy-closure</command> calls
-<command>ssh</command>, you may be asked to type in the appropriate
-password or passphrase.  In fact, you may be asked
-<emphasis>twice</emphasis> because <command>nix-copy-closure</command>
-currently connects twice to the remote machine, first to get the set
-of paths missing on the target machine, and second to send the dump of
-those paths.  If this bothers you, use
-<command>ssh-agent</command>.</para>
-
-
-<refsection><title>Options</title>
-
-<variablelist>
-  
-  <varlistentry><term><option>--to</option></term>
-
-    <listitem><para>Copy the closure of
-    <replaceable>paths</replaceable> from the local Nix store to the
-    Nix store on <replaceable>machine</replaceable>.  This is the
-    default.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--from</option></term>
-
-    <listitem><para>Copy the closure of
-    <replaceable>paths</replaceable> from the Nix store on
-    <replaceable>machine</replaceable> to the local Nix
-    store.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--sign</option></term>
-
-    <listitem><para>Let the sending machine cryptographically sign the
-    dump of each path with the key in
-    <filename>/nix/etc/nix/signing-key.sec</filename>.  If the user on
-    the target machine does not have direct access to the Nix store
-    (i.e., if the target machine has a multi-user Nix installation),
-    then the target machine will check the dump against
-    <filename>/nix/etc/nix/signing-key.pub</filename> before unpacking
-    it in its Nix store.  This allows secure sharing of store paths
-    between untrusted users on two machines, provided that there is a
-    trust relation between the Nix installations on both machines
-    (namely, they have matching public/secret keys).</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--gzip</option></term>
-
-    <listitem><para>Compress the dump of each path with
-    <command>gzip</command> before sending it.</para></listitem>
-
-  </varlistentry>
-
-</variablelist>
-
-</refsection>
-
-
-<refsection><title>Environment variables</title>
-
-<variablelist>
-
-  <varlistentry><term><envar>NIX_SSHOPTS</envar></term>
-
-    <listitem><para>Additional options to be passed to
-    <command>ssh</command> on the command line.</para></listitem>
-
-  </varlistentry>
-  
-</variablelist>
-
-</refsection>
-
-
-<refsection><title>Examples</title>
-
-<para>Copy Firefox with all its dependencies to a remote machine:
-
-<screen>
-$ nix-copy-closure --to alice@itchy.labs $(type -tP firefox)</screen>
-
-</para>
-
-<para>Copy Subversion from a remote machine and then install it into a
-user environment:
-
-<screen>
-$ nix-copy-closure --from alice@itchy.labs \
-    /nix/store/0dj0503hjxy5mbwlafv1rsbdiyx1gkdy-subversion-1.4.4
-$ nix-env -i /nix/store/0dj0503hjxy5mbwlafv1rsbdiyx1gkdy-subversion-1.4.4
-</screen>
-
-</para>
-
-</refsection>
-
-
-</refsection>
-
-</refentry>

doc/manual/nix-hash.xml

@@ -1,163 +0,0 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-hash">
-  
-<refmeta>
-  <refentrytitle>nix-hash</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>nix-hash</refname>
-  <refpurpose>compute the cryptographic hash of a path</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-hash</command>
-    <arg><option>--flat</option></arg>
-    <arg><option>--base32</option></arg>
-    <arg><option>--truncate</option></arg>
-    <arg><option>--type</option> <replaceable>hashAlgo</replaceable></arg>
-    <arg choice='plain' rep='repeat'><replaceable>path</replaceable></arg>
-  </cmdsynopsis>
-  <cmdsynopsis>
-    <command>nix-hash</command>
-    <arg choice='plain'><option>--to-base16</option></arg>
-    <arg choice='plain' rep='repeat'><replaceable>hash</replaceable></arg>
-  </cmdsynopsis>
-  <cmdsynopsis>
-    <command>nix-hash</command>
-    <arg choice='plain'><option>--to-base32</option></arg>
-    <arg choice='plain' rep='repeat'><replaceable>hash</replaceable></arg>
-  </cmdsynopsis>
-</refsynopsisdiv>
-
-
-<refsection><title>Description</title>
-
-<para>The command <command>nix-hash</command> computes the
-cryptographic hash of the contents of each
-<replaceable>path</replaceable> and prints it on standard output.  By
-default, it computes an MD5 hash, but other hash algorithms are
-available as well.  The hash is printed in hexadecimal.</para>
-
-<para>The hash is computed over a <emphasis>serialisation</emphasis>
-of each path: a dump of the file system tree rooted at the path.  This
-allows directories and symlinks to be hashed as well as regular files.
-The dump is in the <emphasis>NAR format</emphasis> produced by <link
-linkend="refsec-nix-store-dump"><command>nix-store</command>
-<option>--dump</option></link>.  Thus, <literal>nix-hash
-<replaceable>path</replaceable></literal> yields the same
-cryptographic hash as <literal>nix-store --dump
-<replaceable>path</replaceable> | md5sum</literal>.</para>
-
-</refsection>
-
-
-<refsection><title>Options</title>
-
-<variablelist>
-  
-  <varlistentry><term><option>--flat</option></term>
-
-    <listitem><para>Print the cryptographic hash of the contents of
-    each regular file <replaceable>path</replaceable>.  That is, do
-    not compute the hash over the dump of
-    <replaceable>path</replaceable>.  The result is identical to that
-    produced by the GNU commands <command>md5sum</command> and
-    <command>sha1sum</command>.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--base32</option></term>
-
-    <listitem><para>Print the hash in a base-32 representation rather
-    than hexadecimal.  This base-32 representation is more compact and
-    can be used in Nix expressions (such as in calls to
-    <function>fetchurl</function>).</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--truncate</option></term>
-
-    <listitem><para>Truncate hashes longer than 160 bits (such as
-    SHA-256) to 160 bits.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--type</option> <replaceable>hashAlgo</replaceable></term>
-
-    <listitem><para>Specify a cryptographic hash, which can be one of
-    <literal>md5</literal>, <literal>sha1</literal>, and
-    <literal>sha256</literal>.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--to-base16</option></term>
-
-    <listitem><para>Don’t hash anything, but convert the base-32 hash
-    representation <replaceable>hash</replaceable> to
-    hexadecimal.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--to-base32</option></term>
-
-    <listitem><para>Don’t hash anything, but convert the hexadecimal
-    hash representation <replaceable>hash</replaceable> to
-    base-32.</para></listitem>
-
-  </varlistentry>
-
-</variablelist>
-
-</refsection>
-
-
-<refsection><title>Examples</title>
-
-<para>Computing hashes:
-
-<screen>
-$ mkdir test
-$ echo "hello" > test/world
-
-$ nix-hash test/ <lineannotation>(MD5 hash; default)</lineannotation>
-8179d3caeff1869b5ba1744e5a245c04
-
-$ nix-store --dump test/ | md5sum <lineannotation>(for comparison)</lineannotation>
-8179d3caeff1869b5ba1744e5a245c04  -
-
-$ nix-hash --type sha1 test/
-e4fd8ba5f7bbeaea5ace89fe10255536cd60dab6
-
-$ nix-hash --type sha1 --base32 test/
-nvd61k9nalji1zl9rrdfmsmvyyjqpzg4
-
-$ nix-hash --type sha256 --flat test/
-error: reading file `test/': Is a directory
-
-$ nix-hash --type sha256 --flat test/world
-5891b5b522d5df086d0ff0b110fbd9d21bb4fc7163af34d08286a2e846f6be03</screen>
-
-</para>
-
-<para>Converting between hexadecimal and base-32:
-
-<screen>
-$ nix-hash --type sha1 --to-base32 e4fd8ba5f7bbeaea5ace89fe10255536cd60dab6
-nvd61k9nalji1zl9rrdfmsmvyyjqpzg4
-
-$ nix-hash --type sha1 --to-base16 nvd61k9nalji1zl9rrdfmsmvyyjqpzg4
-e4fd8ba5f7bbeaea5ace89fe10255536cd60dab6</screen>
-
-</para>
-
-</refsection>
-
-
-</refentry>

doc/manual/nix-install-package.xml

@@ -1,198 +0,0 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-install-package">
-  
-<refmeta>
-  <refentrytitle>nix-install-package</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>nix-install-package</refname>
-  <refpurpose>install a Nix Package file</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-install-package</command>
-    <arg><option>--non-interactive</option></arg>
-    <arg>
-      <group choice='req'>
-        <arg choice='plain'><option>--profile</option></arg>
-        <arg choice='plain'><option>-p</option></arg>
-      </group>
-      <replaceable>path</replaceable>
-    </arg>
-    <sbr />
-    <group choice='req'>
-      <arg choice='req'>
-        <option>--url</option>
-        <arg choice='plain'><replaceable>url</replaceable></arg>
-      </arg>
-      <arg choice='req'>
-        <arg choice='plain'><replaceable>file</replaceable></arg>
-      </arg>
-    </group>
-  </cmdsynopsis>
-</refsynopsisdiv>
-
-
-<refsection><title>Description</title>
-
-<para>The command <command>nix-install-package</command> interactively
-installs a Nix Package file (<filename>*.nixpkg</filename>), which is
-a small file that contains a store path to be installed along with the
-URL of a <link linkend="sec-nix-push"><command>nix-push</command>
-manifest</link>.  The Nix Package file is either
-<replaceable>file</replaceable>, or automatically downloaded from
-<replaceable>url</replaceable> if the <option>--url</option> switch is
-used.</para>
-
-<para><command>nix-install-package</command> is used in <link
-linkend="sec-one-click">one-click installs</link> to download and
-install pre-built binary packages with all necessary dependencies.
-<command>nix-install-package</command> is intended to be associated
-with the MIME type <literal>application/nix-package</literal> in a web
-browser so that it is invoked automatically when you click on
-<filename>*.nixpkg</filename> files.  When invoked, it restarts itself
-in a terminal window (since otherwise it would be invisible when run
-from a browser), asks the user to confirm whether to install the
-package, and if so downloads and installs the package into the user’s
-current profile.</para>
-
-<para>To obtain a window, <command>nix-install-package</command> tries
-to restart itself with <command>xterm</command>,
-<command>konsole</command> and
-<command>gnome-terminal</command>.</para>
-
-</refsection>
-
-
-<refsection><title>Options</title>
-
-<variablelist>
-  
-  <varlistentry><term><option>--non-interactive</option></term>
-
-    <listitem><para>Do not open a new terminal window and do not ask
-    for confirmation.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--profile</option></term>
-    <term><option>-p</option></term>
-
-    <listitem><para>Install the package into the specified profile
-    rather than the user’s current profile.</para></listitem>
-
-  </varlistentry>
-
-</variablelist>
-
-</refsection>
-
-
-<refsection><title>Examples</title>
-
-<para>To install <filename>subversion-1.4.0.nixpkg</filename> into the
-user’s current profile, without any prompting:
-
-<screen>
-$ nix-install-package --non-interactive subversion-1.4.0.nixpkg</screen>
-
-</para>
-
-<para>To install the same package from some URL into a different
-profile:
-
-<screen>
-$ nix-install-package --non-interactive -p /nix/var/nix/profiles/eelco \
-    --url http://nix.cs.uu.nl/dist/nix/nixpkgs-0.10pre6622/pkgs/subversion-1.4.0-i686-linux.nixpkg</screen>
-
-</para>
-
-</refsection>
-
-
-<refsection><title>Format of <literal>nixpkg</literal> files</title>
-
-<para>A Nix Package file consists of a single line with the following
-format:
-
-<screen>
-NIXPKG1 <replaceable>manifestURL</replaceable> <replaceable>name</replaceable> <replaceable>system</replaceable> <replaceable>drvPath</replaceable> <replaceable>outPath</replaceable></screen>
-
-The elemens are as follows:
-
-<variablelist>
-
-  <varlistentry><term><literal>NIXPKG1</literal></term>
-  
-    <listitem><para>The version of the Nix Package
-    file.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><replaceable>manifestURL</replaceable></term>
-  
-    <listitem><para>The manifest to be pulled by
-    <command>nix-pull</command>.  The manifest must contain
-    <replaceable>outPath</replaceable>.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><replaceable>name</replaceable></term>
-  
-    <listitem><para>The symbolic name and version of the
-    package.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><replaceable>system</replaceable></term>
-  
-    <listitem><para>The platform identifier of the platform for which
-    this binary package is intended.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><replaceable>drvPath</replaceable></term>
-  
-    <listitem><para>The path in the Nix store of the derivation from
-    which <replaceable>outPath</replaceable> was built.  Not currently
-    used.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><replaceable>outPath</replaceable></term>
-  
-    <listitem><para>The path in the Nix store of the package.  After
-    <command>nix-install-package</command> has obtained the manifest
-    from <replaceable>manifestURL</replaceable>, it performs a
-    <literal>nix-env -i</literal> <replaceable>outPath</replaceable>
-    to install the binary package.</para></listitem>
-
-  </varlistentry>
-
-</variablelist>
-  
-</para>
-
-<para>An example follows:
-
-<screen>
-NIXPKG1 http://.../nixpkgs-0.10pre6622/MANIFEST subversion-1.4.0 i686-darwin \
-  /nix/store/4kh60jkp...-subversion-1.4.0.drv \
-  /nix/store/nkw7wpgb...-subversion-1.4.0</screen>
-
-(The line breaks (<literal>\</literal>) are for presentation purposes
-and not part of the actual file.)
-
-</para>
-
-</refsection>
-
-
-</refentry>

doc/manual/nix-instantiate.xml

@@ -1,201 +1,65 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-instantiate">
-  
-<refmeta>
-  <refentrytitle>nix-instantiate</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
+<refentry>
+  <refnamediv>
+    <refname>nix-instantiate</refname>
+    <refpurpose>instantiate store expressions from Nix expressions</refpurpose>
+  </refnamediv>
 
-<refnamediv>
-  <refname>nix-instantiate</refname>
-  <refpurpose>instantiate store derivations from Nix expressions</refpurpose>
-</refnamediv>
+  <refsynopsisdiv>
+    <cmdsynopsis>
+      <command>nix-instantiate</command>
+      &opt-common-syn;
+      <arg choice='plain' rep='repeat'><replaceable>files</replaceable></arg>
+    </cmdsynopsis>
+  </refsynopsisdiv>
 
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-instantiate</command>
-    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xmlns(db=http://docbook.org/ns/docbook)xpointer(/db:nop/*)" />
-    <arg><option>--arg</option> <replaceable>name</replaceable> <replaceable>value</replaceable></arg>
-    <arg>
-      <group choice='req'>
-        <arg choice='plain'><option>--attr</option></arg>
-        <arg choice='plain'><option>-A</option></arg>
-      </group>
-      <replaceable>attrPath</replaceable>
-    </arg>
-    <arg><option>--add-root</option> <replaceable>path</replaceable></arg>
-    <arg><option>--indirect</option></arg>
-    <arg>
-      <group choice='req'>
-        <arg choice='plain'><option>--parse-only</option></arg>
-        <arg choice='plain'>
-          <option>--eval-only</option>
-          <arg><option>--strict</option></arg>
-        </arg>
-      </group>
-      <arg><option>--xml</option></arg>
-    </arg>
-    <arg choice='plain' rep='repeat'><replaceable>files</replaceable></arg>
-  </cmdsynopsis>
-</refsynopsisdiv>
+  <refsection>
+    <title>Description</title>
 
+    <para>
+      The command <command>nix-instantiate</command> generates
+      (low-level) store expressions from (high-level) Nix expressions.
+      It loads and evaluates the Nix expressions in each of
+      <replaceable>files</replaceable>.  Each top-level expression
+      should evaluate to a derivation, a list of derivations, or a set
+      of derivations.  The paths of the resulting store expressions
+      are printed on standard output.
+    </para>
 
-<refsection><title>Description</title>
+    <para>
+      This command is generally used for testing Nix expression before
+      they are used with <command>nix-env</command>.
+    </para>
 
-<para>The command <command>nix-instantiate</command> generates <link
-linkend="gloss-derivation">store derivations</link> from (high-level)
-Nix expressions.  It loads and evaluates the Nix expressions in each
-of <replaceable>files</replaceable>.  Each top-level expression should
-evaluate to a derivation, a list of derivations, or a set of
-derivations.  The paths of the resulting store derivations are printed
-on standard output.</para>
+  </refsection>
 
-<para>If <replaceable>files</replaceable> is the character
-<literal>-</literal>, then a Nix expression will be read from standard
-input.</para>
+  <refsection>
+    <title>Options</title>
 
-<para>Most users and developers don’t need to use this command
-(<command>nix-env</command> and <command>nix-build</command> perform
-store derivation instantiation from Nix expressions automatically).
-It is most commonly used for implementing new deployment
-policies.</para>
+    <variablelist>
 
-<para>See also <xref linkend="sec-common-options" /> for a list of
-common options.</para>
+      &opt-common;
 
-</refsection>
+    </variablelist>
 
+  </refsection>
 
-<refsection><title>Options</title>
+  <refsection>
+    <title>Examples</title>
 
-<variablelist>
+    <screen>
+$ nix-instantiate gcc.nix <lineannotation>(instantiate)</lineannotation>
+/nix/store/468abdcb93aa22bb721142615b97698b-d-gcc-3.3.2.store
 
-  <varlistentry>
-    <term><option>--add-root</option> <replaceable>path</replaceable></term>
-    <term><option>--indirect</option></term>
+$ nix-store -r $(nix-instantiate gcc.nix) <lineannotation>(build)</lineannotation>
 
-    <listitem><para>See the <link linkend="opt-add-root">corresponding
-    options</link> in <command>nix-store</command>.</para></listitem>
+$ nix-store -r $(nix-instantiate gcc.nix) <lineannotation>(print output path)</lineannotation>
+/nix/store/9afa718cddfdfe94b5b9303d0430ceb1-gcc-3.3.2
 
-  </varlistentry>
-
-    
-  <varlistentry><term><option>--parse-only</option></term>
-  
-    <listitem><para>Just parse the input files, and print their
-    abstract syntax trees on standard output in ATerm
-    format.</para></listitem>
-    
-  </varlistentry>
-      
-  <varlistentry><term><option>--eval-only</option></term>
-  
-    <listitem><para>Just parse and evaluate the input files, and print
-    the resulting values on standard output.  No instantiation of
-    store derivations takes place.</para></listitem>
-    
-  </varlistentry>
-
-  <varlistentry><term><option>--xml</option></term>
-
-    <listitem><para>When used with <option>--parse-only</option> and
-    <option>--eval-only</option>, print the resulting expression as an
-    XML representation of the abstract syntax tree rather than as an
-    ATerm.  The schema is the same as that used by the <link
-    linkend="builtin-toXML"><function>toXML</function>
-    built-in</link>.</para></listitem>
-
-  </varlistentry>
-
-  <varlistentry><term><option>--strict</option></term>
-
-    <listitem><para>When used with <option>--eval-only</option>,
-    recursively evaluate list elements and attributes.  Normally, such
-    sub-expressions are left unevaluated (since the Nix expression
-    language is lazy).</para>
-
-    <warning><para>This option can cause non-termination, because lazy
-    data structures can be infinitely large.</para></warning>
-
-    </listitem>
-
-  </varlistentry>
-
-</variablelist>
-
-</refsection>
-
-
-<refsection><title>Examples</title>
-
-<para>Instantiating store derivations from a Nix expression, and
-building them using <command>nix-store</command>:
-
-<screen>
-$ nix-instantiate test.nix <lineannotation>(instantiate)</lineannotation>
-/nix/store/cigxbmvy6dzix98dxxh9b6shg7ar5bvs-perl-BerkeleyDB-0.26.drv
-
-$ nix-store -r $(nix-instantiate test.nix) <lineannotation>(build)</lineannotation>
-<replaceable>...</replaceable>
-/nix/store/qhqk4n8ci095g3sdp93x7rgwyh9rdvgk-perl-BerkeleyDB-0.26 <lineannotation>(output path)</lineannotation>
-
-$ ls -l /nix/store/qhqk4n8ci095g3sdp93x7rgwyh9rdvgk-perl-BerkeleyDB-0.26
-dr-xr-xr-x    2 eelco    users        4096 1970-01-01 01:00 lib
+$ ls -l /nix/store/9afa718cddfdfe94b5b9303d0430ceb1-gcc-3.3.2
+dr-xr-xr-x    2 eelco    users         360 2003-12-01 16:12 bin
+dr-xr-xr-x    3 eelco    users          72 2003-12-01 16:12 include
 ...</screen>
 
-</para>
-
-<para>Parsing and evaluating Nix expressions:
-
-<screen>
-$ echo '"foo" + "bar"' | nix-instantiate --parse-only -
-OpPlus(Str("foo"),Str("bar"))
-
-$ echo '"foo" + "bar"' | nix-instantiate --eval-only -
-Str("foobar")
-
-$ echo '"foo" + "bar"' | nix-instantiate --eval-only --xml -
-<![CDATA[<?xml version='1.0' encoding='utf-8'?>
-<expr>
-  <string value="foobar" />
-</expr>]]></screen>
-
-</para>
-
-<para>The difference between non-strict and strict evaluation:
-
-<screen>
-$ echo 'rec { x = "foo"; y = x; }' | nix-instantiate --eval-only --xml -
-<replaceable>...</replaceable><![CDATA[
-    <attr name="x">
-      <string value="foo" />
-    </attr>
-    <attr name="y">
-      <unevaluated />
-    </attr>]]>
-<replaceable>...</replaceable></screen>
-
-Note that <varname>y</varname> is left unevaluated (the XML
-representation doesn’t attempt to show non-normal forms).
-
-<screen>
-$ echo 'rec { x = "foo"; y = x; }' | nix-instantiate --eval-only --xml --strict -
-<replaceable>...</replaceable><![CDATA[
-    <attr name="x">
-      <string value="foo" />
-    </attr>
-    <attr name="y">
-      <string value="foo" />
-    </attr>]]>
-<replaceable>...</replaceable></screen>
-
-</para>
-
-</refsection>
-
-
+  </refsection>
+    
 </refentry>

doc/manual/nix-lang-ref.xml

@@ -1,4 +1,4 @@
-<appendix>
+<chapter>
   <title>Nix Language Reference</title>
 
   <sect1>
@@ -178,5 +178,100 @@
     </productionset>
     
   </sect1>
+  
 
-</appendix>
+
+  <sect1>
+    <title>Semantics</title>
+
+
+    
+    <sect2>
+      <title>Built-in functions</title>
+
+      <para>
+        The Nix language provides the following built-in function
+        (<quote>primops</quote>):
+      </para>
+
+      <variablelist>
+
+        <varlistentry>
+          <term><function>import</function>
+          <replaceable>e</replaceable></term>
+          <listitem>
+            <para>
+              Evaluates the expression <replaceable>e</replaceable>,
+              which must yield a path value.  The Nix expression
+              stored at this path in the file system is then read,
+              parsed, and evaluated.  Returns the result of the
+              evaluation of the Nix expression just read.
+            </para>
+
+            <para>
+              Example: <literal>import ./foo.nix</literal> evaluates
+              the expression stored in <filename>foo.nix</filename>
+              (in the directory containing the expression in which the
+              <function>import</function> occurs).
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term><function>derivation</function>
+          <replaceable>e</replaceable></term>
+          <listitem>
+            <para>
+              Evaluates the expression <replaceable>e</replaceable>,
+              which must yield an attribute set.  [...]
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term><function>baseNameOf</function>
+          <replaceable>e</replaceable></term>
+          <listitem>
+            <para>
+              Evaluates the expression <replaceable>e</replaceable>,
+              which must yield a string value, and returns a string
+              representing its <emphasis>base name</emphasis>.  This
+              is the substring following the last path separator
+              (<literal>/</literal>).
+            </para>
+
+            <para>
+              Example: <literal>baseNameOf "/foo/bar"</literal>
+              returns <literal>"bar"</literal>, and
+              <literal>baseNameOf "/foo/bar/"</literal> returns
+              <literal>""</literal>.
+            </para>
+          </listitem>
+        </varlistentry>
+
+        <varlistentry>
+          <term><function>toString</function>
+          <replaceable>e</replaceable></term>
+          <listitem>
+            <para>
+              Evaluates the expression <replaceable>e</replaceable>
+              and coerces it into a string, if possible.  Only
+              strings, paths, and URIs can be so coerced.
+            </para>
+
+            <para>
+              Example: <literal>toString
+              http://www.cs.uu.nl/</literal> returns
+              <literal>"http://www.cs.uu.nl/"</literal>.
+            </para>
+          </listitem>
+        </varlistentry>
+            
+      </variablelist>
+
+    </sect2>
+
+  </sect1>
+  
+
+</chapter>

doc/manual/nix-prefetch-url.xml

@@ -1,79 +1,54 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-prefetch-url">
-  
-<refmeta>
-  <refentrytitle>nix-prefetch-url</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
+<refentry>
+  <refnamediv>
+    <refname>nix-prefetch-url</refname>
+    <refpurpose>copy a file from a URL into the store and print its MD5 hash</refpurpose>
+  </refnamediv>
 
-<refnamediv>
-  <refname>nix-prefetch-url</refname>
-  <refpurpose>copy a file from a URL into the store and print its MD5 hash</refpurpose>
-</refnamediv>
+  <refsynopsisdiv>
+    <cmdsynopsis>
+      <command>nix-prefetch-url</command>
+      <arg choice='plain'><replaceable>url</replaceable></arg>
+    </cmdsynopsis>
+  </refsynopsisdiv>
 
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-prefetch-url</command>
-    <arg choice='plain'><replaceable>url</replaceable></arg>
-    <arg><replaceable>hash</replaceable></arg>
-  </cmdsynopsis>
-</refsynopsisdiv>
+  <refsection>
+    <title>Description</title>
 
+    <para>
+      The command <command>nix-prefetch-url</command> downloads the
+      file referenced by the URL <replaceable>url</replaceable>,
+      prints its MD5 cryptographic hash code, and copies it into the
+      Nix store.  The file name in the store is
+      <filename><replaceable>hash</replaceable>-<replaceable>basename</replaceable></filename>,
+      where <replaceable>basename</replaceable> is everything
+      following the final slash in <replaceable>url</replaceable>.
+    </para>
 
-<refsection><title>Description</title>
+    <para>
+      This command is just a convenience to Nix expression writers.
+      Often a Nix expressions fetch some source distribution from the
+      network using the <literal>fetchurl</literal> expression
+      contained in <literal>nixpkgs</literal>.  However,
+      <literal>fetchurl</literal> requires an MD5 hash.  If you don't
+      know the hash, you would have to download the file first, and
+      then <literal>fetchurl</literal> would download it again when
+      you build your Nix expression.  Since
+      <literal>fetchurl</literal> uses the same name for the
+      downloaded file as <command>nix-prefetch-url</command>, the
+      redundant download can be avoided.
+    </para>
 
-<para>The command <command>nix-prefetch-url</command> downloads the
-file referenced by the URL <replaceable>url</replaceable>, prints its
-cryptographic hash, and copies it into the Nix store.  The file name
-in the store is
-<filename><replaceable>hash</replaceable>-<replaceable>baseName</replaceable></filename>,
-where <replaceable>baseName</replaceable> is everything following the
-final slash in <replaceable>url</replaceable>.</para>
+  </refsection>
 
-<para>This command is just a convenience for Nix expression writers.
-Often a Nix expression fetches some source distribution from the
-network using the <literal>fetchurl</literal> expression contained in
-Nixpkgs.  However, <literal>fetchurl</literal> requires a
-cryptographic hash.  If you don't know the hash, you would have to
-download the file first, and then <literal>fetchurl</literal> would
-download it again when you build your Nix expression.  Since
-<literal>fetchurl</literal> uses the same name for the downloaded file
-as <command>nix-prefetch-url</command>, the redundant download can be
-avoided.</para>
+  <refsection>
+    <title>Examples</title>
 
-<para>The environment variable <envar>NIX_HASH_ALGO</envar> specifies
-which hash algorithm to use.  It can be either <literal>md5</literal>,
-<literal>sha1</literal>, or <literal>sha256</literal>.  The default is
-<literal>sha256</literal>.</para>
-
-<para>If <replaceable>hash</replaceable> is specified, then a download
-is not performed if the Nix store already contains a file with the
-same hash and base name.  Otherwise, the file is downloaded, and an
-error if signaled if the actual hash of the file does not match the
-specified hash.</para>
-
-<para>This command prints the hash on standard output.  Additionally,
-if the environment variable <envar>PRINT_PATH</envar> is set, the path
-of the downloaded file in the Nix store is also printed.</para>
-
-</refsection>
-
-
-<refsection><title>Examples</title>
-
-<screen>
+    <screen>
 $ nix-prefetch-url ftp://ftp.nluug.nl/pub/gnu/make/make-3.80.tar.bz2
-0bbd1df101bc0294d440471e50feca71
-
-$ PRINT_PATH=1 nix-prefetch-url ftp://ftp.nluug.nl/pub/gnu/make/make-3.80.tar.bz2
-0bbd1df101bc0294d440471e50feca71
-/nix/store/wvyz8ifdn7wyz1p3pqyn0ra45ka2l492-make-3.80.tar.bz2</screen>
-
-</refsection>
+...
+file has hash 0bbd1df101bc0294d440471e50feca71
+...</screen>
 
+  </refsection>
     
 </refentry>

doc/manual/nix-pull.xml

@@ -1,50 +1,43 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-pull">
+<refentry>
+  <refnamediv>
+    <refname>nix-pull</refname>
+    <refpurpose>pull substitutes from a network cache</refpurpose>
+  </refnamediv>
 
-<refmeta>
-  <refentrytitle>nix-pull</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
+  <refsynopsisdiv>
+    <cmdsynopsis>
+      <command>nix-pull</command>
+      <arg choice='plain'><replaceable>url</replaceable></arg>
+    </cmdsynopsis>
+  </refsynopsisdiv>
 
-<refnamediv>
-  <refname>nix-pull</refname>
-  <refpurpose>pull substitutes from a network cache</refpurpose>
-</refnamediv>
+  <refsection>
+    <title>Description</title>
 
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-pull</command>
-    <arg choice='plain'><replaceable>url</replaceable></arg>
-  </cmdsynopsis>
-</refsynopsisdiv>
+    <para>
+      The command <command>nix-pull</command> obtains a list of
+      pre-built store paths from the URL
+      <replaceable>url</replaceable>, and for each of these store
+      paths, registers a substitute derivation that downloads and
+      unpacks it into the Nix store.  This is used to speed up
+      installations: if you attempt to install something that has
+      already been built and stored into the network cache, Nix can
+      transparently re-use the pre-built store paths.
+    </para>
 
+    <para>
+      The file at <replaceable>url</replaceable> must be compatible
+      with the files created by <replaceable>nix-push</replaceable>.
+    </para>
 
-<refsection><title>Description</title>
+  </refsection>
 
-<para>The command <command>nix-pull</command> obtains a list of
-pre-built store paths from the URL <replaceable>url</replaceable>, and
-for each of these store paths, registers a substitute derivation that
-downloads and unpacks it into the Nix store.  This is used to speed up
-installations: if you attempt to install something that has already
-been built and stored into the network cache, Nix can transparently
-re-use the pre-built store paths.</para>
-
-<para>The file at <replaceable>url</replaceable> must be compatible
-with the files created by <replaceable>nix-push</replaceable>.</para>
-
-</refsection>
-
-
-<refsection><title>Examples</title>
-
-<screen>
-$ nix-pull http://nix.cs.uu.nl/dist/nix/nixpkgs-0.5pre753/MANIFEST</screen>
-
-</refsection>
+  <refsection>
+    <title>Examples</title>
 
+    <screen>
+$ nix-pull http://catamaran.labs.cs.uu.nl/dist/nix/nixpkgs-0.5pre753/MANIFEST</screen>
 
+  </refsection>
+    
 </refentry>

doc/manual/nix-push.xml

@@ -1,129 +1,138 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-push">
+<refentry>
+  <refnamediv>
+    <refname>nix-push</refname>
+    <refpurpose>push store paths onto a network cache</refpurpose>
+  </refnamediv>
 
-<refmeta>
-  <refentrytitle>nix-push</refentrytitle>
-  <manvolnum>1</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
+  <refsynopsisdiv>
+    <cmdsynopsis>
+      <command>nix-push</command>
+      <arg choice='plain'><replaceable>archives-put-url</replaceable></arg>
+      <arg choice='plain'><replaceable>archives-get-url</replaceable></arg>
+      <arg choice='plain'><replaceable>manifest-put-url</replaceable></arg>
+      <arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg>
+    </cmdsynopsis>
+  </refsynopsisdiv>
 
-<refnamediv>
-  <refname>nix-push</refname>
-  <refpurpose>push store paths onto a network cache</refpurpose>
-</refnamediv>
+  <refsection>
+    <title>Description</title>
 
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-push</command>
-    <group choice='req'>
-      <arg choice='req'>
-        <arg choice='plain'><replaceable>archivesPutURL</replaceable></arg>
-        <arg choice='plain'><replaceable>archivesGetURL</replaceable></arg>
-        <arg choice='plain'><replaceable>manifestPutURL</replaceable></arg>
-      </arg>
-      <arg choice='req'>
-        <arg choice='plain'><option>--copy</option></arg>
-        <arg choice='plain'><replaceable>archivesDir</replaceable></arg>
-        <arg choice='plain'><replaceable>manifestFile</replaceable></arg>
-      </arg>
-    </group>
-    <arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg>
-  </cmdsynopsis>
-</refsynopsisdiv>
+    <para>
+      The command <command>nix-push</command> builds a set of store
+      expressions (if necessary), and then packages and uploads all
+      store paths in the resulting closures to a server.  A network
+      cache thus populated can subsequently be used to speed up
+      software deployment on other machines using the
+      <command>nix-pull</command> command.
+    </para>
 
-
-<refsection><title>Description</title>
-
-<para>The command <command>nix-push</command> builds a set of store
-paths (if necessary), and then packages and uploads all store paths in
-the resulting closures to a server.  A network cache thus populated
-can subsequently be used to speed up software deployment on other
-machines using the <command>nix-pull</command> command.</para>
-
-<para><command>nix-push</command> performs the following actions.
+    <para>
+      <command>nix-push</command> performs the following actions.
       
-<orderedlist>
+      <orderedlist>
 
-  <listitem><para>Each path in <replaceable>paths</replaceable> is
-  realised (using <link
-  linkend='rsec-nix-store-realise'><literal>nix-store
-  --realise</literal></link>).</para></listitem>
+        <listitem>
+          <para>
+            The store expressions stored in
+            <replaceable>paths</replaceable> are realised (using
+            <literal>nix-store --realise</literal>).
+          </para>
+        </listitem>
 
-  <listitem><para>All paths in the closure of the store expressions
-  stored in <replaceable>paths</replaceable> are determined (using
-  <literal>nix-store --query --requisites
-  --include-outputs</literal>).  It should be noted that since the
-  <option>--include-outputs</option> flag is used, you get a combined
-  source/binary distribution.</para></listitem>
+        <listitem>
+          <para>
+            All paths in the closure of the store expressions stored
+            in <replaceable>paths</replaceable> are determined (using
+            <literal>nix-store --query --requisites
+            --include-successors</literal>).  It should be noted that
+            since the <option>--include-successors</option> flag is
+            used, if you specify a derivation store expression, you
+            get a combined source/binary distribution.  If you only
+            want a binary distribution, you should specify the closure
+            store expression that result from realising these (see
+            below).
+          </para>
+        </listitem>
 
-  <listitem><para>All store paths determined in the previous step are
-  packaged and compressed into a <command>bzip</command>ped NAR
-  archive (extension <filename>.nar.bz2</filename>).</para></listitem>
+        <listitem>
+          <para>
+            All store paths determined in the previous step are
+            packaged and compressed into a <command>bzip</command>ped
+            NAR archive (extension <filename>.nar.bz2</filename>).
+          </para>
+        </listitem>
 
-  <listitem><para>A <emphasis>manifest</emphasis> is created that
-  contains information on the store paths, their eventual URLs in the
-  cache, and cryptographic hashes of the contents of the NAR
-  archives.</para></listitem>
+        <listitem>
+          <para>
+            A <emphasis>manifest</emphasis> is created that contains
+            information on the store paths, their eventual URLs in the
+            cache, and cryptographic hashes of the contents of the NAR
+            archives.
+          </para>
+        </listitem>
 
-  <listitem><para>Each store path is uploaded to the remote directory
-  specified by <replaceable>archivesPutURL</replaceable>.  HTTP PUT
-  requests are used to do this.  However, before a file
-  <varname>x</varname> is uploaded to
-  <literal><replaceable>archivesPutURL</replaceable>/</literal><varname>x</varname>,
-  <command>nix-push</command> first determines whether this upload is
-  unnecessary by issuing a HTTP HEAD request on
-  <literal><replaceable>archivesGetURL</replaceable>/</literal><varname>x</varname>.
-  This allows a cache to be shared between many partially overlapping
-  <command>nix-push</command> invocations.  (We use two URLs because
-  the upload URL typically refers to a CGI script, while the download
-  URL just refers to a file system directory on the
-  server.)</para></listitem>
+        <listitem>
+          <para>
+            Each store path is uploaded to the remote directory
+            specified by <replaceable>archives-put-url</replaceable>.
+            HTTP PUT requests are used to do this.  However, before a
+            file <varname>x</varname> is uploaded to
+            <literal><replaceable>archives-put-url</replaceable>/<varname>x</varname></literal>,
+            <command>nix-push</command> first determines whether this
+            upload is unnecessary by issuing a HTTP HEAD request on
+            <literal><replaceable>archives-get-url</replaceable>/<varname>x</varname></literal>.
+            This allows a cache to be shared between many partially
+            overlapping <command>nix-push</command> invocations.
+            (We use two URLs because the upload URL typically
+            refers to a CGI script, while the download URL just refers
+            to a file system directory on the server.)
+          </para>
+        </listitem>
 
-  <listitem><para>The manifest is uploaded using an HTTP PUT request
-  to <replaceable>manifestPutURL</replaceable>.  The corresponding
-  URL to download the manifest can then be used by
-  <command>nix-pull</command>.</para></listitem>
+        <listitem>
+          <para>
+            The manifest is uploaded using an HTTP PUT request to
+            <replaceable>manifest-put-url</replaceable>.  The
+            corresponding URL to download the manifest can then be
+            used by <command>nix-pull</command>.
+          </para>
+        </listitem>
         
-</orderedlist>
-
-</para>
-
-<!--
-<para>TODO:  <option>- -copy</option></para>
--->
+      </orderedlist>
+    </para>
             
-</refsection>
+  </refsection>
 
+  <refsection>
+    <title>Examples</title>
 
-<refsection><title>Examples</title>
-
-<para>To upload files there typically is some CGI script on the server
-side.  This script should be be protected with a password.  The
-following example uploads the store paths resulting from building the
-Nix expressions in <filename>foo.nix</filename>, passing appropriate
-authentication information:
+    <para>
+      To upload files there typically is some CGI script on the server
+      side.  This script should be be protected with a password.  The
+      following example uploads the store paths resulting from
+      building the Nix expressions in <filename>foo.nix</filename>,
+      passing appropriate authentication information:
     
-<screen>
+      <screen>
 $ nix-push \
     http://foo@bar:server.domain/cgi-bin/upload.pl/cache \
     http://server.domain/cache \
     http://foo@bar:server.domain/cgi-bin/upload.pl/MANIFEST \
     $(nix-instantiate foo.nix)</screen>
 
-This will push both sources and binaries (and any build-time
-dependencies used in the build, such as compilers).</para>
+    This will push both sources and binaries (and any build-time
+    dependencies used in the build, such as compilers).
+    </para>
 
-<para>If we just want to push binaries, not sources and build-time
-dependencies, we can do:
+    <para>
+      If we just want to push binaries, not sources and build-time
+      dependencies, we can do:
       
-<screen>
-$ nix-push <replaceable>urls</replaceable> $(nix-store -r $(nix-instantiate foo.nix))</screen>
+      <screen>
+$ nix-push <replaceable>urls</replaceable> $(nix-instantiate $(nix-store -r foo.nix))</screen>
     
-</para>
+    </para>
 
-</refsection>
+  </refsection>
     
 </refentry>

doc/manual/nix-worker.xml

@@ -1,35 +0,0 @@
-<refentry xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink"
-          xmlns:xi="http://www.w3.org/2001/XInclude"
-          xml:id="sec-nix-worker">
-
-<refmeta>
-  <refentrytitle>nix-worker</refentrytitle>
-  <manvolnum>8</manvolnum>
-  <refmiscinfo class="source">Nix</refmiscinfo>
-  <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo>
-</refmeta>
-
-<refnamediv>
-  <refname>nix-worker</refname>
-  <refpurpose>Nix multi-user support daemon</refpurpose>
-</refnamediv>
-
-<refsynopsisdiv>
-  <cmdsynopsis>
-    <command>nix-worker</command>
-    <arg choice="plain"><option>--daemon</option></arg>
-  </cmdsynopsis>
-</refsynopsisdiv>
-
-
-<refsection><title>Description</title>
-
-<para>The Nix daemon is necessary in multi-user Nix installations.  It
-performs build actions and other operations on the Nix store on behalf
-of unprivileged users.</para>
-
-
-</refsection>
-
-</refentry>

doc/manual/opt-common-syn.xml

@@ -1,34 +1,8 @@
-<nop xmlns="http://docbook.org/ns/docbook">
-  
 <arg><option>--help</option></arg>
 <arg><option>--version</option></arg>
 <arg rep='repeat'><option>--verbose</option></arg>
 <arg rep='repeat'><option>-v</option></arg>
-<arg><option>--no-build-output</option></arg>
-<arg><option>-Q</option></arg>
-<arg>
-  <group choice='req'>
-    <arg choice='plain'><option>--max-jobs</option></arg>
-    <arg choice='plain'><option>-j</option></arg>
-  </group>
-  <replaceable>number</replaceable>
-</arg>
-<arg>
-  <arg><option>--cores</option></arg>
-  <replaceable>number</replaceable>
-</arg>
-<arg>
-  <arg><option>--max-silent-time</option></arg>
-  <replaceable>number</replaceable>
-</arg>
-<arg><option>--keep-going</option></arg>
-<arg><option>-k</option></arg>
+<arg><option>--build-output</option></arg>
+<arg><option>-B</option></arg>
 <arg><option>--keep-failed</option></arg>
 <arg><option>-K</option></arg>
-<arg><option>--fallback</option></arg>
-<arg><option>--readonly-mode</option></arg>
-<arg><option>--log-type</option> <replaceable>type</replaceable></arg>
-<arg><option>--show-trace</option></arg>
-<sbr />
-
-</nop>

doc/manual/opt-common.xml

@@ -1,337 +1,122 @@
-<section xmlns="http://docbook.org/ns/docbook" xml:id="sec-common-options">
-
-<title>Common options</title>
-
-
-<para>Most Nix commands accept the following command-line options:</para>
-
-<variablelist>
-
-<varlistentry><term><option>--help</option></term>
-  
-  <listitem><para>Prints out a summary of the command syntax and
-  exits.</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><option>--version</option></term>
-  
-  <listitem><para>Prints out the Nix version number on standard output
-  and exits.</para></listitem>
-</varlistentry>
-
-
-<varlistentry><term><option>--verbose</option></term>
-  <term><option>-v</option></term>
-
+<varlistentry>
+  <term><option>--help</option></term>
   <listitem>
-    
-  <para>Increases the level of verbosity of diagnostic messages
-  printed on standard error.  For each Nix operation, the information
-  printed on standard output is well-defined; any diagnostic
-  information is printed on standard error, never on standard
-  output.</para>
-
-  <para>This option may be specified repeatedly.  Currently, the
-  following verbosity levels exist:</para>
-
-  <variablelist>
-    
-    <varlistentry><term>0</term>
-    <listitem><para>“Errors only”: only print messages
-    explaining why the Nix invocation failed.</para></listitem>
-    </varlistentry>
-      
-    <varlistentry><term>1</term>
-    <listitem><para>“Informational”: print
-    <emphasis>useful</emphasis> messages about what Nix is doing.
-    This is the default.</para></listitem>
-    </varlistentry>
-      
-    <varlistentry><term>2</term>
-    <listitem><para>“Talkative”: print more informational
-    messages.</para></listitem>
-    </varlistentry>
-
-    <varlistentry><term>3</term>
-    <listitem><para>“Chatty”: print even more
-    informational messages.</para></listitem>
-    </varlistentry>
-
-    <varlistentry><term>4</term>
-    <listitem><para>“Debug”: print debug
-    information.</para></listitem>
-    </varlistentry>
-
-    <varlistentry><term>5</term>
-    <listitem><para>“Vomit”: print vast amounts of debug
-    information.</para></listitem>
-    </varlistentry>
-    
-  </variablelist>
-
-  </listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><option>--no-build-output</option></term>
-  <term><option>-Q</option></term>
-
-  <listitem><para>By default, output written by builders to standard
-  output and standard error is echoed to the Nix command's standard
-  error.  This option suppresses this behaviour.  Note that the
-  builder's standard output and error are always written to a log file
-  in
-  <filename><replaceable>prefix</replaceable>/nix/var/log/nix</filename>.</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry xml:id="opt-max-jobs"><term><option>--max-jobs</option></term>
-  <term><option>-j</option></term>
-
-  <listitem><para>Sets the maximum number of build jobs that Nix will
-  perform in parallel to the specified number.  The default is
-  specified by the <link
-  linkend='conf-build-max-jobs'><literal>build-max-jobs</literal></link>
-  configuration setting, which itself defaults to
-  <literal>1</literal>.  A higher value is useful on SMP systems or to
-  exploit I/O latency.</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry xml:id="opt-cores"><term><option>--cores</option></term>
-
-  <listitem><para>Sets the value of the <envar>NIX_BUILD_CORES</envar>
-  environment variable in the invocation of builders.  Builders can
-  use this variable at their discretion to control the maximum amount
-  of parallelism.  For instance, in Nixpkgs, if the derivation
-  attribute <varname>enableParallelBuilding</varname> is set to
-  <literal>true</literal>, the builder passes the
-  <option>-j<replaceable>N</replaceable></option> flag to GNU Make.
-  It defaults to the value of the <link
-  linkend='conf-build-cores'><literal>build-cores</literal></link>
-  configuration setting, if set, or <literal>1</literal> otherwise.
-  The value <literal>0</literal> means that the builder should use all
-  available CPU cores in the system.</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry xml:id="opt-max-silent-time"><term><option>--max-silent-time</option></term>
-
-  <listitem><para>Sets the maximum number of seconds that a builder
-  can go without producing any data on standard output or standard
-  error.  The default is specified by the <link
-  linkend='conf-build-max-silent-time'><literal>build-max-silent-time</literal></link>
-  configuration setting.  <literal>0</literal> means no
-  time-out.</para></listitem>
-
-</varlistentry>
-
-<varlistentry><term><option>--keep-going</option></term>
-  <term><option>-k</option></term>
-
-  <listitem><para>Keep going in case of failed builds, to the
-  greatest extent possible.  That is, if building an input of some
-  derivation fails, Nix will still build the other inputs, but not the
-  derivation itself.  Without this option, Nix stops if any build
-  fails (except for builds of substitutes), possibly killing builds in
-  progress (in case of parallel or distributed builds).</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry><term><option>--keep-failed</option></term>
-  <term><option>-K</option></term>
-
-  <listitem><para>Specifies that in case of a build failure, the
-  temporary directory (usually in <filename>/tmp</filename>) in which
-  the build takes place should not be deleted.  The path of the build
-  directory is printed as an informational message.
+    <para>
+      Prints out a summary of the command syntax and exits.
     </para>
   </listitem>
 </varlistentry>
 
 
-<varlistentry><term><option>--fallback</option></term>
-
+<varlistentry>
+  <term><option>--version</option></term>
   <listitem>
+    <para>
+      Prints out the Nix version number on standard output and exits.
+    </para>
+  </listitem>
+</varlistentry>
 
-  <para>Whenever Nix attempts to build a derivation for which
-  substitutes are known for each output path, but realising the output
-  paths through the substitutes fails, fall back on building the
-  derivation.</para>
 
-  <para>The most common scenario in which this is useful is when we
-  have registered substitutes in order to perform binary distribution
-  from, say, a network repository.  If the repository is down, the
-  realisation of the derivation will fail.  When this option is
-  specified, Nix will build the derivation instead.  Thus,
-  installation from binaries falls back on nstallation from source.
-  This option is not the default since it is generally not desirable
-  for a transient failure in obtaining the substitutes to lead to a
-  full build from source (with the related consumption of
-  resources).</para>
+<varlistentry>
+  <term><option>--verbose</option> / <option>-v</option></term>
+  <listitem>
+    <para>
+      Increases the level of verbosity of diagnostic messages printed
+      on standard error.  For each Nix operation, the information
+      printed on standard output is well-defined; any diagnostic
+      information is printed on standard error, never on standard
+      output.
+    </para>
+
+    <para>
+      This option may be specified repeatedly.  Currently, the
+      following verbosity levels exist:
+    </para>
+
+    <variablelist>
+      <varlistentry>
+        <term>0</term>
+        <listitem>
+          <para>
+            <quote>Errors only</quote>: only print messages explaining
+            why the Nix invocation failed.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>1</term>
+        <listitem>
+          <para>
+            <quote>Informational</quote>: print
+            <emphasis>useful</emphasis> messages about what Nix is
+            doing.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>2</term>
+        <listitem>
+          <para>
+            <quote>Talkative</quote>: print more informational messages.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>3</term>
+        <listitem>
+          <para>
+            <quote>Chatty</quote>: print even more informational messages.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>4</term>
+        <listitem>
+          <para>
+            <quote>Debug</quote>: print debug information:
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term>5</term>
+        <listitem>
+          <para>
+            <quote>Vomit</quote>: print vast amounts of debug
+            information.
+          </para>
+        </listitem>
+      </varlistentry>
+    </variablelist>
 
   </listitem>
-  
 </varlistentry>
 
 
-<varlistentry><term><option>--readonly-mode</option></term>
-
-  <listitem><para>When this option is used, no attempt is made to open
-  the Nix database.  Most Nix operations do need database access, so
-  those operations will fail.</para></listitem>
-  
-</varlistentry>
-
-
-<varlistentry xml:id="opt-log-type"><term><option>--log-type</option>
-<replaceable>type</replaceable></term>
-
+<varlistentry>
+  <term><option>--build-output</option> / <option>-B</option></term>
   <listitem>
-
-  <para>This option determines how the output written to standard
-  error is formatted.  Nix’s diagnostic messages are typically
-  <emphasis>nested</emphasis>.  For instance, when tracing Nix
-  expression evaluation (<command>nix-env -vvvvv</command>, messages
-  from subexpressions are nested inside their parent expressions.  Nix
-  builder output is also often nested.  For instance, the Nix Packages
-  generic builder nests the various build tasks (unpack, configure,
-  compile, etc.), and the GNU Make in <literal>stdenv-linux</literal>
-  has been patched to provide nesting for recursive Make
-  invocations.</para>
-
-  <para><replaceable>type</replaceable> can be one of the
-  following:
-
-  <variablelist>
-
-    <varlistentry><term><literal>pretty</literal></term>
-
-      <listitem><para>Pretty-print the output, indicating different
-      nesting levels using spaces.  This is the
-      default.</para></listitem>
-
-    </varlistentry>
-
-    <varlistentry><term><literal>escapes</literal></term>
-
-      <listitem><para>Indicate nesting using escape codes that can be
-      interpreted by the <command>nix-log2xml</command> tool in the
-      Nix source distribution.  The resulting XML file can be fed into
-      the <command>log2html.xsl</command> stylesheet to create an HTML
-      file that can be browsed interactively, using Javascript to
-      expand and collapse parts of the output.</para></listitem>
-
-    </varlistentry>
-
-    <varlistentry><term><literal>flat</literal></term>
-
-      <listitem><para>Remove all nesting.</para></listitem>
-
-    </varlistentry>
-
-  </variablelist>    
-  
-  </para>
-
+    <para>
+      Causes the output written by build actions to standard output
+      and standard error to be echoed to standard error, regardless of
+      verbosity level.  By default, it is only echoed at a verbosity
+      level of at least 4 (<quote>Debug</quote>), and is suppressed at
+      lower levels.  Note that it is always written to a log file in
+      <filename><replaceable>prefix</replaceable>/nix/var/log/nix</filename>.
+    </para>
   </listitem>
-  
 </varlistentry>
 
 
-<varlistentry><term><option>--arg</option> <replaceable>name</replaceable> <replaceable>value</replaceable></term>
-
-  <listitem><para>This option is accepted by
-  <command>nix-env</command>, <command>nix-instantiate</command> and
-  <command>nix-build</command>.  When evaluating Nix expressions, the
-  expression evaluator will automatically try to call functions that
-  it encounters.  It can automatically call functions for which every
-  argument has a <link linkend='ss-functions'>default value</link>
-  (e.g., <literal>{<replaceable>argName</replaceable> ?
-  <replaceable>defaultValue</replaceable>}:
-  <replaceable>...</replaceable></literal>).  With
-  <option>--arg</option>, you can also call functions that have
-  arguments without a default value (or override a default value).
-  That is, if the evaluator encounters a function with an argument
-  named <replaceable>name</replaceable>, it will call it with value
-  <replaceable>value</replaceable>.</para>
-
-  <para>For instance, the file
-  <literal>pkgs/top-level/all-packages.nix</literal> in Nixpkgs is
-  actually a function:
-
-<programlisting>
-{ # The system (e.g., `i686-linux') for which to build the packages.
-  system ? builtins.currentSystem
-  <replaceable>...</replaceable>
-}: <replaceable>...</replaceable></programlisting>
-
-  So if you call this Nix expression (e.g., when you do
-  <literal>nix-env -i <replaceable>pkgname</replaceable></literal>),
-  the function will be called automatically using the value <link
-  linkend='builtin-currentSystem'><literal>builtins.currentSystem</literal></link>
-  for the <literal>system</literal> argument.  You can override this
-  using <option>--arg</option>, e.g., <literal>nix-env -i
-  <replaceable>pkgname</replaceable> --arg system
-  \"i686-freebsd\"</literal>.  (Note that since the argument is a Nix
-  string literal, you have to escape the quotes.)</para></listitem>
-
+<varlistentry>
+  <term><option>--keep-failed</option> / <option>-K</option></term>
+  <listitem>
+    <para>
+      Specifies that in case of a build failure, the temporary
+      directory (usually in <filename>/tmp</filename>) in which the
+      build takes place should not be deleted.  The path of the build
+      directory is printed as an informational message.
+    </para>
+  </listitem>
 </varlistentry>
 
-
-<varlistentry><term><option>--argstr</option> <replaceable>name</replaceable> <replaceable>value</replaceable></term>
-
-  <listitem><para>This option is like <option>--arg</option>, only the
-  value is not a Nix expression but a string.  So instead of
-  <literal>--arg system \"i686-linux\"</literal> (the outer quotes are
-  to keep the shell happy) you can say <literal>--argstr system
-  i686-linux</literal>.</para></listitem>
-
-</varlistentry>
-
-
-<varlistentry xml:id="opt-attr"><term><option>--attr</option> / <option>-A</option>
-<replaceable>attrPath</replaceable></term>
-
-  <listitem><para>In <command>nix-env</command>,
-  <command>nix-instantiate</command> and <command>nix-build</command>,
-  <option>--attr</option> allows you to select an attribute from the
-  top-level Nix expression being evaluated.  The <emphasis>attribute
-  path</emphasis> <replaceable>attrPath</replaceable> is a sequence of
-  attribute names separated by dots.  For instance, given a top-level
-  Nix expression <replaceable>e</replaceable>, the attribute path
-  <literal>xorg.xorgserver</literal> would cause the expression
-  <literal><replaceable>e</replaceable>.xorg.xorgserver</literal> to
-  be used.  See <link
-  linkend='refsec-nix-env-install-examples'><command>nix-env
-  --install</command></link> for some concrete examples.</para>
-
-  <para>In addition to attribute names, you can also specify array
-  indices.  For instance, the attribute path
-  <literal>foo.3.bar</literal> selects the <literal>bar</literal>
-  attribute of the fourth element of the array in the
-  <literal>foo</literal> attribute of the top-level
-  expression.</para></listitem>
-
-</varlistentry>
-
-
-<varlistentry><term><option>--show-trace</option></term>
-  
-  <listitem><para>Causes Nix to print out a stack trace in case of Nix
-  expression evaluation errors.</para></listitem>
-  
-</varlistentry>
-
-
-</variablelist>
-
-
-</section>

doc/manual/opt-inst-syn.xml

@@ -1,22 +0,0 @@
-<nop xmlns="http://docbook.org/ns/docbook">
-  
-  <arg>
-    <group choice='req'>
-      <arg choice='plain'><option>--prebuilt-only</option></arg>
-      <arg choice='plain'><option>-b</option></arg>
-    </group>
-  </arg>
-  
-  <arg>
-    <group choice='req'>
-      <arg choice='plain'><option>--attr</option></arg>
-      <arg choice='plain'><option>-A</option></arg>
-    </group>
-  </arg>
-
-  <arg><option>--from-expression</option></arg>
-  <arg><option>-E</option></arg>
-    
-  <arg><option>--from-profile</option> <replaceable>path</replaceable></arg>
-
-</nop>

doc/manual/overview.xml

@@ -0,0 +1,450 @@
+<chapter id='chap-overview'>
+  <title>Overview</title>
+
+  <para>
+    This chapter provides a guided tour of Nix.
+  </para>
+
+
+  
+  <!--######################################################################-->
+
+  <sect1>
+    <title>Basic package management</title>
+
+    <para>
+      Let's start from the perspective of an end user.  Common operations at
+      this level are to install and remove packages, ask what packages are
+      installed or available for installation, and so on.  These are operations
+      on the <emphasis>user environment</emphasis>: the set of packages that a
+      user <quote>sees</quote>.  In a command line Unix environment, this means
+      the set of programs that are available through the <envar>PATH</envar>
+      environment variable.  (In other environments it might mean the set of
+      programs available on the desktop, through the start menu, and so on.)
+    </para>
+
+    <para>
+      The terms <quote>installation</quote> and <quote>uninstallation</quote>
+      are used in this context to denote the act of adding or removing packages
+      from the user environment.  In Nix, these operations are dissociated from
+      the physical copying or deleting of files.  Installation requires that
+      the files constituting the package are present, but they may be present
+      beforehand.  Likewise, uninstallation does not actually delete any files;
+      this is done automatically by running a garbage collector.
+    </para>
+
+    <para>
+      User environments are manipulated through the <command>nix-env</command>
+      command.  The query operation can be used to see what packages are
+      currently installed.
+    </para>
+
+    <screen>
+$ nix-env -q
+MozillaFirebird-0.7
+sylpheed-0.9.7
+pan-0.14.2</screen>
+
+    <para>
+      (<option>-q</option> is actually short for <option>--query
+        --installed</option>.)  The package names are symbolic: they don't have
+      any particular significance to Nix (as they shouldn't, since they are not
+      unique&mdash;there can be many derivations with the same name).  Note that
+      these packages have many dependencies (e.g., Mozilla uses the
+      <literal>gtk+</literal> package) but these have not been installed in the
+      user environment, though they are present on the system.  Generally,
+      there is no need to install such packages; only packages containing
+      programs should be installed.
+    </para>
+      
+    <para>
+      To install packages, a <emphasis>Nix expression</emphasis> is required
+      that tells Nix how to build that package.  There is a <ulink
+        url='https://svn.cs.uu.nl:12443/dist/trace/trace-nixpkgs-trunk.tar.bz2'>set 
+        of standard of Nix expressions</ulink> for many common packages.
+      Assuming that you have downloaded and unpacked these, you can view the
+      set of available packages:
+    </para>
+
+    <screen>
+$ nix-env -qaf pkgs/system/i686-linux.nix
+gettext-0.12.1
+sylpheed-0.9.7
+aterm-2.0
+gtk+-1.2.10
+apache-httpd-2.0.48
+pan-0.14.2
+...</screen>
+
+    <para>
+      The Nix expression in the file <filename>i686-linux.nix</filename> yields
+      the set of packages for a Linux system running on x86 hardware.  For
+      other platforms, copy and modify this file for your platform as
+      appropriate. [TODO: improve this]
+    </para>
+
+    <para>
+      It is also possible to see the <emphasis>status</emphasis> of available
+      packages, i.e., whether they are installed into the user environment
+      and/or present in the system:
+    </para>
+
+    <screen>
+$ nix-env -qasf pkgs/system/i686-linux.nix
+-P gettext-0.12.1
+IP sylpheed-0.9.7
+-- aterm-2.0
+-P gtk+-1.2.10</screen>
+
+    <para>
+      This reveals that the <literal>sylpheed</literal> package is already
+      installed, or more precisely, that exactly the same instantiation of
+      <literal>sylpheed</literal> is installed.  This guarantees that the
+      available package is exactly the same as the installed package with
+      regard to sources, dependencies, build flags, and so on.  Similarly, we
+      see that the <literal>gettext</literal> and <literal>gtk+</literal>
+      packages are present but not installed in the user environment, while the
+      <literal>aterm</literal> package is not installed or present at all (so,
+      if we were to install it, it would have to be built or downloaded first).
+    </para>
+
+    <para>
+      The install operation is used install available packages from a Nix
+      environment.  To install the <literal>pan</literal> package (a
+      newsreader), you would do:
+    </para>
+
+    <screen>
+$ nix-env -if pkgs/system/i686-linux.nix pan</screen>
+
+    <para>
+      Since installation may take a long time, depending on whether any
+      packages need to be built or downloaded, it's a good idea to make
+      <command>nix-env</command> run verbosely by using the <option>-v</option>
+      (<option>--verbose</option>) option.  This option may be repeated to
+      increase the level of verbosity.  A good value is 3
+      (<option>-vvv</option>).
+    </para>
+
+    <para>
+      In fact, if you run this command verbosely you will observe that Nix
+      starts to build many packages, including large and fundamental ones such
+      as <literal>glibc</literal> and <literal>gcc</literal>.  I.e., you are
+      performing a source installation.  This is generally undesirable, since
+      installation from sources may require large amounts of disk and CPU
+      resources.  Therefore a <quote>binary</quote> installation is generally
+      preferable.
+    </para>
+
+    <para>
+      Rather than provide different mechanisms to create and perform
+      the installation of binary packages, Nix supports binary deployment
+      <emphasis>transparently</emphasis> through a generic mechanism of
+      <emphasis>substitute expressions</emphasis>.  If an request is made to
+      build some Nix expression, Nix will first try to build any substitutes
+      for that expression.  These substitutes presumably perform an identical
+      build operation with respect to the result, but require less resources.
+      For instance, a substitute that downloads a pre-built package from the
+      network requires less CPU and disk resources, and possibly less time.
+    </para>
+
+    <para>
+      Nix's use of cryptographic hashes makes this entirely safe.  It is not
+      possible, for instance, to accidentally substitute a build of some
+      package for a Solaris or Windows system for a build on a SuSE/x86 system.
+    </para>
+
+    <para>
+      While the substitute mechanism is a generic mechanism, Nix provides two
+      standard tools called <command>nix-pull</command> and
+      <command>nix-push</command> that maintain and use a shared cache of
+      prebuilt derivations on some network site (reachable through HTTP).  If
+      you attempt to install some package that someone else has previously
+      built and <quote>pushed</quote> into the cache, and you have done a
+      <quote>pull</quote> to register substitutes that download these prebuilt
+      packages, then the installation will automatically use these.
+    </para>
+
+    <para>
+      For example, to pull from our <ulink
+        url='http://losser.st-lab.cs.uu.nl/~eelco/nix-dist/'>cache</ulink> of
+      prebuilt packages (at the time of writing, for SuSE Linux/x86), use the
+      following command:
+    </para>
+
+    <screen>
+$ nix-pull http://catamaran.labs.cs.uu.nl/dist/nix/nixpkgs-<replaceable>version</replaceable>/MANIFEST
+obtaining list of Nix archives at http://catamaran.labs.cs.uu.nl/dist/nix/nixpkgs-<replaceable>version</replaceable>/MANIFEST...
+...</screen>
+
+    <para>
+      If <command>nix-pull</command> is run without any arguments, it will pull
+      from the URLs specified in the file
+      <filename><replaceable>prefix</replaceable>/etc/nix/prebuilts.conf</filename>.
+    </para>
+
+    <para>
+      Assuming that the <literal>pan</literal> installation produced no errors,
+      it can be used immediately, that is, it now appears in a directory in the
+      <envar>PATH</envar> environment variable.  Specifically,
+      <envar>PATH</envar> includes the entry
+      <filename><replaceable>prefix</replaceable>/var/nix/profiles/default/bin</filename>, 
+      where
+      <filename><replaceable>prefix</replaceable>/var/nix/profiles/default</filename> 
+      is just a symlink to the current user environment:
+    </para>
+
+    <screen>
+$ ls -l /nix/var/nix/profiles/
+...
+lrwxrwxrwx  1 eelco ... default-15-link -> /nix/store/1871...12b0-user-environment
+lrwxrwxrwx  1 eelco ... default-16-link -> /nix/store/59ba...df6b-user-environment
+lrwxrwxrwx  1 eelco ... default -> default-16-link</screen>
+
+    <para>
+      That is, <filename>default</filename> in this example is a link
+      to <filename>default-16-link</filename>, which is the current
+      user environment.  Before the installation, it pointed to
+      <filename>default-15-link</filename>.  Note that this means that
+      you can atomically roll-back to the previous user environment by
+      pointing the symlink <filename>default</filename> at
+      <filename>default-15-link</filename> again.  This also shows
+      that operations such as installation are atomic in the Nix
+      system: any arbitrarily complex set of installation,
+      uninstallation, or upgrade actions eventually boil down to the
+      single operation of pointing a symlink somewhere else (which can
+      be implemented atomically in Unix).
+    </para>
+
+    <para>
+      What's in a user environment? It's just a set of symlinks to the files
+      that constitute the installed packages.  For instance:
+    </para>
+
+    <screen>
+$ ls -l /nix/var/nix/profiles/default-16-link/bin
+lrwxrwxrwx  1 eelco ... MozillaFirebird -> /nix/store/35f8...4ae6-MozillaFirebird-0.7/bin/MozillaFirebird
+lrwxrwxrwx  1 eelco ... svn -> /nix/store/3829...fb5d-subversion-0.32.1/bin/svn
+...</screen>
+
+    <para>
+      Note that, e.g., <filename>svn</filename> =
+      <filename>/nix/var/nix/profiles/default/bin/svn</filename> =
+      <filename>/nix/var/nix/profiles/default-16-link/bin/svn</filename> =
+      <filename>/nix/store/59ba...df6b-user-environment/bin/svn</filename> =
+      <filename>/nix/store/3829...fb5d-subversion-0.32.1/bin/svn</filename>.
+    </para>
+
+    <para>
+      Naturally, packages can also be uninstalled:
+    </para>
+
+    <screen>
+$ nix-env -e pan</screen>
+
+    <para>
+      This means that the package is removed from the user
+      environment.  It is <emphasis>not</emphasis> yet removed from
+      the system.  When a package is uninstalled from a user
+      environment, it may still be used by other packages, or may
+      still be present in other user environments.  Deleting it under
+      such conditions would break those other packages or user
+      environments.  To prevent this, packages are only
+      <quote>physically</quote> deleted by running the Nix garbage
+      collector, which searches for all packages in the Nix store that
+      are no longer <quote>reachable</quote> from outside the store.
+      Thus, uninstalling a package is always safe: it cannot break
+      other packages.
+    </para>
+
+    <para>
+      Upgrading packages is easy.  Given a Nix expression that
+      contains newer versions of installed packages (that is, packages
+      with the same package name, but a higher version number),
+      <command>nix-env -u</command> will replace the installed package
+      in the user environment with the newer package.  For example,
+      
+      <screen>
+$ nix-env -uf pkgs/system/i686-linux.nix pan</screen>
+
+      looks for a newer version of Pan, and installs it if found.
+      Also useful is the ability to upgrade <emphasis>all</emphasis>
+      packages:
+      
+      <screen>
+$ nix-env -uf pkgs/system/i686-linux.nix '*'</screen>
+
+      The asterisk matches all installed packages<footnote><para>No,
+      we don't support arbitrary regular
+      expressions</para></footnote>.  Note that <literal>*</literal>
+      must be quoted to prevent shell globbing.
+    </para>
+
+  </sect1>
+
+
+  
+  <!--######################################################################-->
+
+  <sect1>
+    <title>Writing Nix expressions</title>
+
+    <sect2>
+      <title>A simple Nix expression</title>
+
+      <para>
+        This section shows how to write simple Nix expressions&mdash;the things
+        that describe how to build a package.
+      </para>
+
+      <example id='ex-hello-nix'>
+        <title>Nix expression for GNU Hello</title>
+        <programlisting>
+{stdenv, fetchurl, perl}: <co id='ex-hello-nix-co-1' />
+
+derivation { <co id='ex-hello-nix-co-2' />
+  name = "hello-2.1.1"; <co id='ex-hello-nix-co-3' />
+  system = stdenv.system; <co id='ex-hello-nix-co-4' />
+  builder = ./builder.sh; <co id='ex-hello-nix-co-5' />
+  src = fetchurl { <co id='ex-hello-nix-co-6' />
+    url = ftp://ftp.nluug.nl/pub/gnu/hello/hello-2.1.1.tar.gz;
+    md5 = "70c9ccf9fac07f762c24f2df2290784d";
+  };
+  stdenv = stdenv; <co id='ex-hello-nix-co-7' />
+  perl = perl;
+}</programlisting>
+      </example>
+
+      <para>
+        A simple Nix expression is shown in <xref linkend='ex-hello-nix' />. It
+        describes how to the build the <ulink
+          url='http://www.gnu.org/directory/GNU/hello.html'>GNU Hello
+          package</ulink>.  This package has several dependencies.  First, it
+        requires a number of other packages, such as a C compiler, standard
+        Unix shell tools, and Perl.  Rather than have this Nix expression refer
+        to and use specific versions of these packages, it should be generic;
+        that is, it should be a <emphasis>function</emphasis> that takes the
+        required packages as inputs and yield a build of the GNU Hello package
+        as a result.  This Nix expression defines a function with three
+        arguments <xref linkend='ex-hello-nix-co-1' />, namely:
+        <orderedlist>
+          <listitem><para><varname>stdenv</varname>, which should be a
+              <emphasis>standard environment package</emphasis>.  The standard
+              environment is a set of tools and other components that would be
+              expected in a fairly minimal Unix-like environment: a C compiler
+              and linker, Unix shell tools, and so on.</para>
+          </listitem>
+          <listitem><para><varname>fetchurl</varname>, which should be a
+              function that given parameters <varname>url</varname> and
+              <varname>md5</varname>, will fetch a file from the specified
+              location and check that this file has the given MD5 hash code.
+              The hash is required because build operations must be
+              <emphasis>pure</emphasis>: given the same inputs they should
+              always yield the same output.  Since network resources can change
+              at any time, we must in some way guarantee what the result will
+              be.</para>
+          </listitem>
+          <listitem><para><varname>perl</varname>, which should be a Perl
+              interpreter.</para>
+          </listitem>
+        </orderedlist>
+      </para>
+
+      <para>
+        The remainder of the file is the body of the function, which happens to
+        be a <emphasis>derivation</emphasis> <xref
+        linkend='ex-hello-nix-co-2' />, which is the built-in function
+        <varname>derivation</varname> applied to a set of attributes that
+        encode all the necessary information for building the GNU Hello
+        package. 
+      </para>
+
+      <example>
+        <title>Build script (<filename>builder.sh</filename>) for GNU
+          Hello</title>
+        <programlisting>
+#! /bin/sh
+
+buildinputs="$perl"
+. $stdenv/setup || exit 1
+
+tar xvfz $src || exit 1
+cd hello-* || exit 1
+./configure --prefix=$out || exit 1
+make || exit 1
+make install || exit 1</programlisting>
+      </example>
+
+    </sect2>
+
+    <sect2>
+      <title>A more complex Nix expression</title>
+
+      <example id='ex-svn-nix'>
+        <title>Nix expression for Subversion</title>
+        <programlisting>
+{ localServer ? false <co id='ex-svn-nix-co-1' />
+, httpServer ? false
+, sslSupport ? false
+, swigBindings ? false
+, stdenv, fetchurl
+, openssl ? null, httpd ? null, db4 ? null, expat, swig ? null
+}:
+
+assert !isNull expat; <co id='ex-svn-nix-co-2' />
+assert localServer -> !isNull db4;
+assert httpServer -> !isNull httpd &amp;&amp; httpd.expat == expat; <co id='ex-svn-nix-co-3' />
+assert sslSupport -> !isNull openssl &amp;&amp; (httpServer -> httpd.openssl == openssl);
+assert swigBindings -> !isNull swig;
+
+derivation {
+  name = "subversion-0.32.1";
+  system = stdenv.system;
+
+  builder = ./builder.sh;
+  src = fetchurl {
+    url = http://svn.collab.net/tarballs/subversion-0.32.1.tar.gz;
+    md5 = "b06717a8ef50db4b5c4d380af00bd901";
+  };
+
+  localServer = localServer;
+  httpServer = httpServer;
+  sslSupport = sslSupport;
+  swigBindings = swigBindings;
+
+  stdenv = stdenv;
+  openssl = if sslSupport then openssl else null; <co id='ex-svn-nix-co-4' />
+  httpd = if httpServer then httpd else null;
+  expat = expat;
+  db4 = if localServer then db4 else null;
+  swig = if swigBindings then swig else null;
+}</programlisting>
+      </example>
+
+      <para>
+        This example shows several features.  Default parameters <xref
+          linkend='ex-svn-nix-co-1'/> can be used to simplify call sites: if an
+        argument that has a default is omitted, its default value is used.
+      </para>
+
+      <para>
+        You can use <emphasis>assertions</emphasis> to test whether arguments
+        satisfy certain constraints.  The simple assertion <xref
+          linkend='ex-svn-nix-co-2'/> tests whether the
+        <varname>expat</varname> argument is not a null value.  The more
+        complex assertion <xref linkend='ex-svn-nix-co-3'/> says that if
+        Subversion is built with Apache support, then <varname>httpd</varname>
+        (the Apache package) must not be null and it must have been built using
+        the same instance of the <varname>expat</varname> library as was passed
+        to the Subversion expression.  This is since the Subversion code is
+        dynamically linked against the Apache code and they both use Expat,
+        they must be linked against the same instance&mdash;otherwise a
+        conflict might occur. 
+      </para>
+
+    </sect2>
+
+  </sect1>
+
+
+</chapter>

doc/manual/package-management.xml

@@ -1,606 +0,0 @@
-<chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id='chap-package-management'>
-
-<title>Package Management</title>
-
-
-<para>This chapter discusses how to do package management with Nix,
-i.e., how to obtain, install, upgrade, and erase packages.  This is
-the “user’s” perspective of the Nix system — people
-who want to <emphasis>create</emphasis> packages should consult
-<xref linkend='chap-writing-nix-expressions' />.</para>
-
-
-<section><title>Basic package management</title>
-
-<para>The main command for package management is <link
-linkend="sec-nix-env"><command>nix-env</command></link>.  You can use
-it to install, upgrade, and erase packages, and to query what
-packages are installed or are available for installation.</para>
-
-<para>In Nix, different users can have different “views”
-on the set of installed applications.  That is, there might be lots of
-applications present on the system (possibly in many different
-versions), but users can have a specific selection of those active —
-where “active” just means that it appears in a directory
-in the user’s <envar>PATH</envar>.  Such a view on the set of
-installed applications is called a <emphasis>user
-environment</emphasis>, which is just a directory tree consisting of
-symlinks to the files of the active applications.  </para>
-
-<para>Components are installed from a set of <emphasis>Nix
-expressions</emphasis> that tell Nix how to build those packages,
-including, if necessary, their dependencies.  There is a collection of
-Nix expressions called the Nix Package collection that contains
-packages ranging from basic development stuff such as GCC and Glibc,
-to end-user applications like Mozilla Firefox.  (Nix is however not
-tied to the Nix Package collection; you could write your own Nix
-expressions based on it, or completely new ones.)  You can download
-the latest version from <link
-xlink:href='http://nixos.org/nixpkgs/download.html' />.</para>
-
-<para>Assuming that you have downloaded and unpacked a release of Nix
-Packages, you can view the set of available packages in the release:
-
-<screen>
-$ nix-env -qaf nixpkgs-<replaceable>version</replaceable> '*'
-ant-blackdown-1.4.2
-aterm-2.2
-bash-3.0
-binutils-2.15
-bison-1.875d
-blackdown-1.4.2
-bzip2-1.0.2
-...</screen>
-
-where <literal>nixpkgs-<replaceable>version</replaceable></literal> is
-where you’ve unpacked the release.  The flag <option>-q</option>
-specifies a query operation; <option>-a</option> means that you want
-to show the “available” (i.e., installable) packages, as opposed to
-the installed packages; and <option>-f</option>
-<filename>nixpkgs-<replaceable>version</replaceable></filename>
-specifies the source of the packages.  The argument
-<literal>'*'</literal> shows all installable packages. (The quotes are
-necessary to prevent shell expansion.)  You can also select specific
-packages by name:
-
-<screen>
-$ nix-env -qaf nixpkgs-<replaceable>version</replaceable> gcc
-gcc-3.4.6
-gcc-4.0.3
-gcc-4.1.1</screen>
-
-</para>
-
-<para>It is also possible to see the <emphasis>status</emphasis> of
-available packages, i.e., whether they are installed into the user
-environment and/or present in the system:
-
-<screen>
-$ nix-env -qasf nixpkgs-<replaceable>version</replaceable> '*'
-...
--PS bash-3.0
---S binutils-2.15
-IPS bison-1.875d
-...</screen>
-
-The first character (<literal>I</literal>) indicates whether the
-package is installed in your current user environment.  The second
-(<literal>P</literal>) indicates whether it is present on your system
-(in which case installing it into your user environment would be a
-very quick operation).  The last one (<literal>S</literal>) indicates
-whether there is a so-called <emphasis>substitute</emphasis> for the
-package, which is Nix’s mechanism for doing binary deployment.  It
-just means that Nix knows that it can fetch a pre-built package from
-somewhere (typically a network server) instead of building it
-locally.</para>
-
-<para>So now that we have a set of Nix expressions we can build the
-packages contained in them.  This is done using <literal>nix-env
--i</literal>.  For instance,
-
-<screen>
-$ nix-env -f nixpkgs-<replaceable>version</replaceable> -i subversion</screen>
-
-will install the package called <literal>subversion</literal> (which
-is, of course, the <link
-xlink:href='http://subversion.tigris.org/'>Subversion version
-management system</link>).</para>
-
-<para>When you do this for the first time, Nix will start building
-Subversion and all its dependencies.  This will take quite a while —
-typically an hour or two on modern machines.  Fortunately, there is a
-faster way (so do a Ctrl-C on that install operation!): you just need
-to tell Nix that pre-built binaries of all those packages are
-available somewhere.  This is done using the
-<command>nix-pull</command> command, which must be supplied with a URL
-containing a <emphasis>manifest</emphasis> describing what binaries
-are available.  This URL should correspond to the Nix Packages release
-that you’re using.  For instance, if you obtained a release from <link
-xlink:href='http://nixos.org/releases/nixpkgs/nixpkgs-0.12pre11712-4lrp7j8x'
-/>, then you should do:
-
-<screen>
-$ nix-pull http://nixos.org/releases/nixpkgs/nixpkgs-0.12pre11712-4lrp7j8x/MANIFEST</screen>
-
-If you then issue the installation command, it should start
-downloading binaries from <systemitem
-class='fqdomainname'>nixos.org</systemitem>, instead of building
-them from source.  This might still take a while since all
-dependencies must be downloaded, but on a reasonably fast connection
-such as an DSL line it’s on the order of a few minutes.</para>
-
-<para>Naturally, packages can also be uninstalled:
-
-<screen>
-$ nix-env -e subversion</screen>
-
-</para>
-
-<para>Upgrading to a new version is just as easy.  If you have a new
-release of Nix Packages, you can do:
-
-<screen>
-$ nix-env -f nixpkgs-<replaceable>version</replaceable> -u subversion</screen>
-
-This will <emphasis>only</emphasis> upgrade Subversion if there is a
-“newer” version in the new set of Nix expressions, as
-defined by some pretty arbitrary rules regarding ordering of version
-numbers (which generally do what you’d expect of them).  To just
-unconditionally replace Subversion with whatever version is in the Nix
-expressions, use <parameter>-i</parameter> instead of
-<parameter>-u</parameter>; <parameter>-i</parameter> will remove
-whatever version is already installed.</para>
-
-<para>You can also upgrade all packages for which there are newer
-versions:
-
-<screen>
-$ nix-env -f nixpkgs-<replaceable>version</replaceable> -u '*'</screen>
-
-</para>
-
-<para>Sometimes it’s useful to be able to ask what
-<command>nix-env</command> would do, without actually doing it.  For
-instance, to find out what packages would be upgraded by
-<literal>nix-env -u '*'</literal>, you can do
-
-<screen>
-$ nix-env ... -u '*' --dry-run
-(dry run; not doing anything)
-upgrading `libxslt-1.1.0' to `libxslt-1.1.10'
-upgrading `graphviz-1.10' to `graphviz-1.12'
-upgrading `coreutils-5.0' to `coreutils-5.2.1'</screen>
-
-</para>
-
-<para>If you grow bored of specifying the Nix expressions using
-<parameter>-f</parameter> all the time, you can set a default
-location:
-
-<screen>
-$ nix-env -I nixpkgs-<replaceable>version</replaceable></screen>
-
-After this you can just say, for instance, <literal>nix-env -u
-'*'</literal>.<footnote><para>Setting a default using
-<parameter>-I</parameter> currently clashes with using Nix channels,
-since <literal>nix-channel --update</literal> calls <literal>nix-env
--I</literal> to set the default to the Nix expressions it downloaded
-from the channel, replacing whatever default you had
-set.</para></footnote></para>
-
-</section>
-
-
-<section xml:id="sec-profiles"><title>Profiles</title>
-
-<para>Profiles and user environments are Nix’s mechanism for
-implementing the ability to allow different users to have different
-configurations, and to do atomic upgrades and rollbacks.  To
-understand how they work, it’s useful to know a bit about how Nix
-works.  In Nix, packages are stored in unique locations in the
-<emphasis>Nix store</emphasis> (typically,
-<filename>/nix/store</filename>).  For instance, a particular version
-of the Subversion package might be stored in a directory
-<filename>/nix/store/dpmvp969yhdqs7lm2r1a3gng7pyq6vy4-subversion-1.1.3/</filename>,
-while another version might be stored in
-<filename>/nix/store/5mq2jcn36ldlmh93yj1n8s9c95pj7c5s-subversion-1.1.2</filename>.
-The long strings prefixed to the directory names are cryptographic
-hashes<footnote><para>160-bit truncations of SHA-256 hashes encoded in
-a base-32 notation, to be precise.</para></footnote> of
-<emphasis>all</emphasis> inputs involved in building the package —
-sources, dependencies, compiler flags, and so on.  So if two
-packages differ in any way, they end up in different locations in
-the file system, so they don’t interfere with each other.  <xref
-linkend='fig-user-environments' /> shows a part of a typical Nix
-store.</para>
-
-<figure xml:id='fig-user-environments'><title>User environments</title>
-  <mediaobject>
-    <imageobject>
-      <imagedata fileref='figures/user-environments.png' format='PNG' />
-    </imageobject>
-  </mediaobject>
-</figure>
-
-<para>Of course, you wouldn’t want to type
-
-<screen>
-$ /nix/store/dpmvp969yhdq...-subversion-1.1.3/bin/svn</screen>
-
-every time you want to run Subversion.  Of course we could set up the
-<envar>PATH</envar> environment variable to include the
-<filename>bin</filename> directory of every package we want to use,
-but this is not very convenient since changing <envar>PATH</envar>
-doesn’t take effect for already existing processes.  The solution Nix
-uses is to create directory trees of symlinks to
-<emphasis>activated</emphasis> packages.  These are called
-<emphasis>user environments</emphasis> and they are packages
-themselves (though automatically generated by
-<command>nix-env</command>), so they too reside in the Nix store.  For
-instance, in <xref linkend='fig-user-environments' /> the user
-environment <filename>/nix/store/5mq2jcn36ldl...-user-env</filename>
-contains a symlink to just Subversion 1.1.2 (arrows in the figure
-indicate symlinks).  This would be what we would obtain if we had done
-
-<screen>
-$ nix-env -i subversion</screen>
-
-on a set of Nix expressions that contained Subversion 1.1.2.</para>
-
-<para>This doesn’t in itself solve the problem, of course; you
-wouldn’t want to type
-<filename>/nix/store/0c1p5z4kda11...-user-env/bin/svn</filename>
-either.  That’s why there are symlinks outside of the store that point
-to the user environments in the store; for instance, the symlinks
-<filename>default-42-link</filename> and
-<filename>default-43-link</filename> in the example.  These are called
-<emphasis>generations</emphasis> since every time you perform a
-<command>nix-env</command> operation, a new user environment is
-generated based on the current one.  For instance, generation 43 was
-created from generation 42 when we did
-
-<screen>
-$ nix-env -i subversion mozilla</screen>
-
-on a set of Nix expressions that contained Mozilla and a new version
-of Subversion.</para>
-
-<para>Generations are grouped together into
-<emphasis>profiles</emphasis> so that different users don’t interfere
-with each other if they don’t want to.  For example:
-
-<screen>
-$ ls -l /nix/var/nix/profiles/
-...
-lrwxrwxrwx  1 eelco ... default-42-link -> /nix/store/0c1p5z4kda11...-user-env
-lrwxrwxrwx  1 eelco ... default-43-link -> /nix/store/3aw2pdyx2jfc...-user-env
-lrwxrwxrwx  1 eelco ... default -> default-43-link</screen>
-
-This shows a profile called <filename>default</filename>.  The file
-<filename>default</filename> itself is actually a symlink that points
-to the current generation.  When we do a <command>nix-env</command>
-operation, a new user environment and generation link are created
-based on the current one, and finally the <filename>default</filename>
-symlink is made to point at the new generation.  This last step is
-atomic on Unix, which explains how we can do atomic upgrades.  (Note
-that the building/installing of new packages doesn’t interfere in
-any way with old packages, since they are stored in different
-locations in the Nix store.)</para>
-
-<para>If you find that you want to undo a <command>nix-env</command>
-operation, you can just do
-
-<screen>
-$ nix-env --rollback</screen>
-
-which will just make the current generation link point at the previous
-link.  E.g., <filename>default</filename> would be made to point at
-<filename>default-42-link</filename>.  You can also switch to a
-specific generation:
-
-<screen>
-$ nix-env --switch-generation 43</screen>
-
-which in this example would roll forward to generation 43 again.  You
-can also see all available generations:
-
-<screen>
-$ nix-env --list-generations</screen></para>
-
-<para>Actually, there is another level of indirection not shown in the
-figure above.  You generally wouldn’t have
-<filename>/nix/var/nix/profiles/<replaceable>some-profile</replaceable>/bin</filename>
-in your <envar>PATH</envar>.  Rather, there is a symlink
-<filename>~/.nix-profile</filename> that points to your current
-profile.  This means that you should put
-<filename>~/.nix-profile/bin</filename> in your <envar>PATH</envar>
-(and indeed, that’s what the initialisation script
-<filename>/nix/etc/profile.d/nix.sh</filename> does).  This makes it
-easier to switch to a different profile.  You can do that using the
-command <command>nix-env --switch-profile</command>:
-
-<screen>
-$ nix-env --switch-profile /nix/var/nix/profiles/my-profile
-
-$ nix-env --switch-profile /nix/var/nix/profiles/default</screen>
-
-These commands switch to the <filename>my-profile</filename> and
-default profile, respectively.  If the profile doesn’t exist, it will
-be created automatically.  You should be careful about storing a
-profile in another location than the <filename>profiles</filename>
-directory, since otherwise it might not be used as a root of the
-garbage collector (see <xref linkend='sec-garbage-collection'
-/>).</para>
-
-<para>All <command>nix-env</command> operations work on the profile
-pointed to by <command>~/.nix-profile</command>, but you can override
-this using the <option>--profile</option> option (abbreviation
-<option>-p</option>):
-
-<screen>
-$ nix-env -p /nix/var/nix/profiles/other-profile -i subversion</screen>
-
-This will <emphasis>not</emphasis> change the
-<command>~/.nix-profile</command> symlink.</para>
-
-</section>
-
-
-<section xml:id='sec-garbage-collection'><title>Garbage collection</title>
-
-<para><command>nix-env</command> operations such as upgrades
-(<option>-u</option>) and uninstall (<option>-e</option>) never
-actually delete packages from the system.  All they do (as shown
-above) is to create a new user environment that no longer contains
-symlinks to the “deleted” packages.</para>
-
-<para>Of course, since disk space is not infinite, unused packages
-should be removed at some point.  You can do this by running the Nix
-garbage collector.  It will remove from the Nix store any package
-not used (directly or indirectly) by any generation of any
-profile.</para>
-
-<para>Note however that as long as old generations reference a
-package, it will not be deleted.  After all, we wouldn’t be able to
-do a rollback otherwise.  So in order for garbage collection to be
-effective, you should also delete (some) old generations.  Of course,
-this should only be done if you are certain that you will not need to
-roll back.</para>
-
-<para>To delete all old (non-current) generations of your current
-profile:
-
-<screen>
-$ nix-env --delete-generations old</screen>
-
-Instead of <literal>old</literal> you can also specify a list of
-generations, e.g.,
-
-<screen>
-$ nix-env --delete-generations 10 11 14</screen>
-
-</para>
-
-<para>After removing appropriate old generations you can run the
-garbage collector as follows:
-
-<screen>
-$ nix-store --gc</screen>
-
-If you are feeling uncertain, you can also first view what files would
-be deleted:
-
-<screen>
-$ nix-store --gc --print-dead</screen>
-
-Likewise, the option <option>--print-live</option> will show the paths
-that <emphasis>won’t</emphasis> be deleted.</para>
-
-<para>There is also a convenient little utility
-<command>nix-collect-garbage</command>, which when invoked with the
-<option>-d</option> (<option>--delete-old</option>) switch deletes all
-old generations of all profiles in
-<filename>/nix/var/nix/profiles</filename>.  So
-
-<screen>
-$ nix-collect-garbage -d</screen>
-
-is a quick and easy way to clean up your system.</para>
-
-
-
-
-<section xml:id="ssec-gc-roots"><title>Garbage collector roots</title>
-
-<para>The roots of the garbage collector are all store paths to which
-there are symlinks in the directory
-<filename><replaceable>prefix</replaceable>/nix/var/nix/gcroots</filename>.
-For instance, the following command makes the path
-<filename>/nix/store/d718ef...-foo</filename> a root of the collector:
-
-<screen>
-$ ln -s /nix/store/d718ef...-foo /nix/var/nix/gcroots/bar</screen>
-	
-That is, after this command, the garbage collector will not remove
-<filename>/nix/store/d718ef...-foo</filename> or any of its
-dependencies.</para>
-
-<para>Subdirectories of
-<filename><replaceable>prefix</replaceable>/nix/var/nix/gcroots</filename>
-are also searched for symlinks.  Symlinks to non-store paths are
-followed and searched for roots, but symlinks to non-store paths
-<emphasis>inside</emphasis> the paths reached in that way are not
-followed to prevent infinite recursion.</para>
-
-</section>
-
-</section>
-
-
-<section xml:id="sec-channels"><title>Channels</title>
-
-<para>If you want to stay up to date with a set of packages, it’s not
-very convenient to manually download the latest set of Nix expressions
-for those packages, use <command>nix-pull</command> to register
-pre-built binaries (if available), and upgrade using
-<command>nix-env</command>.  Fortunately, there’s a better way:
-<emphasis>Nix channels</emphasis>.</para>
-
-<para>A Nix channel is just a URL that points to a place that contains
-a set of Nix expressions and a manifest.  Using the command <link
-linkend="sec-nix-channel"><command>nix-channel</command></link> you
-can automatically stay up to date with whatever is available at that
-URL.</para>
-
-<para>You can “subscribe” to a channel using
-<command>nix-channel --add</command>, e.g.,
-
-<screen>
-$ nix-channel --add http://nixos.org/releases/nixpkgs/channels/nixpkgs-unstable</screen>
-
-subscribes you to a channel that always contains that latest version
-of the Nix Packages collection.  (Instead of
-<literal>nixpkgs-unstable</literal> you could also subscribe to
-<literal>nixpkgs-stable</literal>, which should have a higher level of
-stability, but right now is just outdated.)  Subscribing really just
-means that the URL is added to the file
-<filename>~/.nix-channels</filename>.  Right now there is no command
-to “unsubscribe”; you should just edit that file manually
-and delete the offending URL.</para>
-
-<para>To obtain the latest Nix expressions available in a channel, do
-
-<screen>
-$ nix-channel --update</screen>
-
-This downloads the Nix expressions in every channel (downloaded from
-<literal><replaceable>url</replaceable>/nixexprs.tar.bz2</literal>)
-and registers any available pre-built binaries in every channel
-(by <command>nix-pull</command>ing
-<literal><replaceable>url</replaceable>/MANIFEST</literal>).  It also
-makes the union of each channel’s Nix expressions the default for
-<command>nix-env</command> operations.  Consequently, you can then say
-
-<screen>
-$ nix-env -u '*'</screen>
-
-to upgrade all packages in your profile to the latest versions
-available in the subscribed channels.</para>
-
-</section>
-
-
-<section xml:id="sec-one-click"><title>One-click installs</title>
-
-<para>Often, when you want to install a specific package (e.g., from
-the <link
-xlink:href="http://nixos.org/nixpkgs/">Nix
-Packages collection</link>), subscribing to a channel is a bit
-cumbersome.  And channels don’t help you at all if you want to install
-an older version of a package than the one provided by the current
-contents of the channel, or a package that has been removed from the
-channel.  That’s when <emphasis>one-click installs</emphasis> come in
-handy: you can just go to the web page that contains the package,
-click on it, and it will be installed with all the necessary
-dependencies.</para>
-
-<para>For instance, you can go to <link
-xlink:href="http://hydra.nixos.org/jobset/nixpkgs/trunk/channel/latest"
-/> and click on any link for the individual packages for your
-platform.  The first time you do this, your browser will ask what to
-do with <literal>application/nix-package</literal> files.  You should
-open them with <filename>/nix/bin/nix-install-package</filename>.
-This will open a window that asks you to confirm that you want to
-install the package.  When you answer <literal>Y</literal>, the
-package and all its dependencies will be installed.  This is a binary
-deployment mechanism — you get packages pre-compiled for the selected
-platform type.</para>
-
-<para>You can also install <literal>application/nix-package</literal>
-files from the command line directly.  See <xref
-linkend='sec-nix-install-package' /> for details.</para>
-
-</section>
-
-
-<section xml:id="sec-sharing-packages"><title>Sharing packages between machines</title>
-
-<para>Sometimes you want to copy a package from one machine to
-another.  Or, you want to install some packages and you know that
-another machine already has some or all of those packages or their
-dependencies.  In that case there are mechanisms to quickly copy
-packages between machines.</para>
-
-<para>The command <command
-linkend="sec-nix-copy-closure">nix-copy-closure</command> copies a Nix
-store path along with all its dependencies to or from another machine
-via the SSH protocol.  It doesn’t copy store paths that are already
-present on the target machine.  For example, the following command
-copies Firefox with all its dependencies:
-
-<screen>
-$ nix-copy-closure --to alice@itchy.example.org $(type -p firefox)</screen>
-
-See <xref linkend='sec-nix-copy-closure' /> for details.</para>
-
-<para>With <command linkend='refsec-nix-store-export'>nix-store
---export</command> and <command
-linkend='refsec-nix-store-import'>nix-store --import</command> you can
-write the closure of a store path (that is, the path and all its
-dependencies) to a file, and then unpack that file into another Nix
-store.  For example,
-
-<screen>
-$ nix-store --export $(type -p firefox) > firefox.closure</screen>
-
-writes the closure of Firefox to a file.  You can then copy this file
-to another machine and install the closure:
-
-<screen>
-$ nix-store --import &lt; firefox.closure</screen>
-
-Any store paths in the closure that are already present in the target
-store are ignored.  It is also possible to pipe the export into
-another command, e.g. to copy and install a closure directly to/on
-another machine:
-
-<screen>
-$ nix-store --export $(type -p firefox) | bzip2 | \
-    ssh alice@itchy.example.org "bunzip2 | nix-store --import"</screen>
-
-But note that <command>nix-copy-closure</command> is generally more
-efficient in this example because it only copies paths that are not
-already present in the target Nix store.</para>
-
-<para>Finally, if you can mount the Nix store of a remote machine in
-your local filesystem, Nix can copy paths from the remote Nix store to
-the local Nix store <emphasis>on demand</emphasis>.  For instance,
-suppose that you mount a remote machine containing a Nix store via
-<command
-xlink:href="http://fuse.sourceforge.net/sshfs.html">sshfs</command>:
-
-<screen>
-$ sshfs alice@itchy.example.org:/ /mnt</screen>
-
-You should then set the <envar>NIX_OTHER_STORES</envar> environment
-variable to tell Nix about this remote Nix store:
-
-<screen>
-$ export NIX_OTHER_STORES=/mnt/nix</screen>
-
-Then if you do any Nix operation, e.g.
-
-<screen>
-$ nix-env -i firefox</screen>
-
-and Nix has to build a path that it sees is already present in
-<filename>/mnt/nix</filename>, then it will just copy from there
-instead of building it from source.</para>
- 
-
-</section>
-
-
-</chapter>

doc/manual/quick-start.xml

@@ -1,145 +1,141 @@
-<chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id="chap-quick-start">
+<chapter>
+  <title>Quick Start</title>
 
-<title>Quick Start</title>
+  <para>
+    This chapter is for impatient people who don't like reading
+    documentation.  For more in-depth information you are kindly
+    referred to <xref linkend='chap-installation' /> and <xref
+    linkend='chap-overview' />.
+  </para>
 
+  <orderedlist>
 
-<para>This chapter is for impatient people who don't like reading
-documentation.  For more in-depth information you are kindly referred
-to the following chapters.</para>
-
-<orderedlist>
-
-<listitem><para>Download a source tarball, RPM or Deb from <link
-xlink:href='http://nixos.org/'/>.  Build source distributions using
-the regular sequence:
+    <listitem>
+      <para>
+        Download a source tarball or RPM from <ulink
+        url='http://www.cs.uu.nl/groups/ST/Trace/Nix'/>.
+        Build source distributions using the regular sequence:
         
-<screen>
+        <screen>
 $ tar xvfj nix-<replaceable>version</replaceable>.tar.bz2
 $ ./configure
 $ make
 $ make install <lineannotation>(as root)</lineannotation></screen>
 
-This will install the Nix binaries in <filename>/usr/local</filename>
-and keep the Nix store and other state in <filename>/nix</filename>.
-You can change the former by specifying
-<option>--prefix=<replaceable>path</replaceable></option>.  The
-location of the store can be changed using
-<option>--with-store-dir=<replaceable>path</replaceable></option>.
-However, you shouldn't change the store location, if at all possible,
-since that will make it impossible to use pre-built binaries from the
-Nixpkgs channel and other channels.  The location of the state can be
-changed using
-<option>--localstatedir=<replaceable>path</replaceable>.</option></para></listitem>
+        This will install Nix in <filename>/nix</filename>.  You
+        should also add <filename>/nix/etc/profile.d/nix.sh</filename>
+        to your <filename>~/.bashrc</filename> (or some other login
+        file).
+      </para>
+    </listitem>
 
-<listitem><para>You should add
-<filename><replaceable>prefix</replaceable>/etc/profile.d/nix.sh</filename>
-to your <filename>~/.bashrc</filename> (or some other login
-file).</para></listitem>
+    <listitem>
+      <para>
+        Get some Nix expressions for pre-built packages by downloading
+        the latest <literal>nixpkgs</literal> distribution (from the
+        same location), and unpack them.
 
-<listitem><para>Subscribe to the Nix Packages channel.
+        <screen>
+$ wget http://<replaceable>...</replaceable>/nix/nixpkgs-<replaceable>version</replaceable>/nixpkgs-<replaceable>version</replaceable>.tar.bz2
+$ tar xfj nixpkgs-<replaceable>version</replaceable>.tar.bz2</screen>
 
-<screen>
-$ nix-channel --add \
-    http://nixos.org/releases/nixpkgs/channels/nixpkgs-unstable</screen>
+        This will unpack the distribution into a directory
+        <filename>nixpkgs-<replaceable>version</replaceable>/</filename>.
+      </para>
+    </listitem>
 
-</para></listitem>
+    <listitem>
+      <para>
+        Pull the Nix cache.  This ensures that when you install
+        packages they are downloaded in pre-built form from the
+        network, rather than built from source.
 
-<listitem><para>Download the latest Nix expressions available in the channel.
-<screen>
-$ nix-channel --update</screen>
+        <screen>
+$ nix-pull http://<replaceable>...</replaceable>/nix/nixpkgs-<replaceable>version</replaceable>/MANIFEST</screen>
 
-Note that this in itself doesn't download any packages, it just
-downloads the Nix expressions that build them and stores them
-somewhere (under <filename>~/.nix-defexpr</filename>, in case you're
-curious).  Also, it registers the fact that pre-built binaries are
-available remotely.</para></listitem>
+      </para>
 
-<listitem><para>See what installable packages are currently available
-in the channel:
+      <para>
+        Note that currently we only pre-build for Linux on x86
+        platforms.
+      </para>
+        
+    </listitem>
+        
+    <listitem>
+      <para>
+        See what's available:
 
-<screen>
-$ nix-env -qa \*
-docbook-xml-4.2
-firefox-1.0pre-PR-0.10.1
+        <screen>
+$ nix-env -qaf nixpkgs-<replaceable>version</replaceable>/
+MozillaFirebird-0.7
 hello-2.1.1
+docbook-xml-4.2
 libxslt-1.1.0
 <replaceable>...</replaceable></screen>
 
-</para></listitem>
+      </para>
+    </listitem>
 
-<listitem><para>Install some packages from the channel:
+    <listitem>
+      <para>
+        Install some packages:
         
-<screen>
-$ nix-env -i hello firefox <replaceable>...</replaceable> </screen>
+        <screen>
+$ nix-env -iBf nixpkgs-<replaceable>version</replaceable>/ hello MozillaFirebird <replaceable>...</replaceable> </screen>
 
-This should download pre-built packages; it should not build them
-locally (if it does, something went wrong).</para></listitem>
+      </para>
+    </listitem>
 
-<listitem><para>Test that they work:
+    <listitem>
+      <para>
+        Test that they work:
 
-<screen>
+        <screen>
 $ which hello
 /home/eelco/.nix-profile/bin/hello
 $ hello
 Hello, world!
-$ firefox
+$ MozillaFirebird
 <lineannotation>(read Slashdot or something)</lineannotation></screen>
 
-</para></listitem>
+      </para>
+    </listitem>
     
-<listitem><para>Uninstall a package:
+    <listitem>
+      <para>
+        Uninstall a package:
 
-<screen>
+        <screen>
 $ nix-env -e hello</screen>
 
-</para></listitem>
+      </para>
+    </listitem>
 
-<listitem><para>To keep up-to-date with the channel, do:
+    <listitem>
+      <para>
+        If a new release of <literal>nixpkgs</literal> comes along,
+        you can upgrade all installed packages to the latest versions
+        by downloading and unpacking the new release and doing:
 
-<screen>
-$ nix-channel --update
-$ nix-env -u '*'</screen>
+        <screen>
+$ nix-env -uBf nixpkgs-<replaceable>version</replaceable>/ '*'</screen>
 
-The latter command will upgrade each installed package for which there
-is a “newer” version (as determined by comparing the version
-numbers).</para></listitem>
+      </para>
+    </listitem>
 
-<listitem><para>You can also install specific packages directly from
-your web browser.  For instance, you can go to <link
-xlink:href="http://hydra.nixos.org/jobset/nixpkgs/trunk/channel/latest" />
-and click on any link for the individual packages for your platform.
-Associate <literal>application/nix-package</literal> with the program
-<filename>/nix/bin/nix-install-package</filename>.  A window should
-appear asking you whether it’s okay to install the package.  Say
-<literal>Y</literal>.  The package and all its dependencies will be
-installed.</para></listitem>
+    <listitem>
+      <para>
+        You should periodically run the Nix garbage collector to get
+        rid of unused packages, since uninstalls or upgrades don't
+        actual delete them:
 
-<listitem><para>If you're unhappy with the result of a
-<command>nix-env</command> action (e.g., an upgraded package turned
-out not to work properly), you can go back:
+        <screen>
+$ nix-collect-garbage | xargs nix-store --delete</screen>
 
-<screen>
-$ nix-env --rollback</screen>
+      </para>
+    </listitem>
 
-</para></listitem>
+  </orderedlist>
 
-<listitem><para>You should periodically run the Nix garbage collector
-to get rid of unused packages, since uninstalls or upgrades don't
-actually delete them:
-
-<screen>
-$ nix-collect-garbage -d</screen>
-
-<!--
-The first command deletes old “generations” of your profile (making
-rollbacks impossible, but also making the packages in those old
-generations available for garbage collection), while the second
-command actually deletes them.-->
-
-</para></listitem>
-
-</orderedlist>
-
-</chapter>
+</chapter>

doc/manual/quote-literals.xsl

@@ -1,44 +0,0 @@
-<?xml version="1.0"?>
-
-<xsl:stylesheet
-  version="1.0"
-  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-  xmlns:str="http://exslt.org/strings"
-  extension-element-prefixes="str">
-
-  <xsl:output method="xml"/>
-  
-  <xsl:template match="function|command|literal|varname|filename|option|quote">`<xsl:apply-templates/>'</xsl:template>
-  
-  <xsl:template match="token"><xsl:text>    </xsl:text><xsl:apply-templates /><xsl:text>
-</xsl:text></xsl:template>
-
-  <xsl:template match="screen|programlisting">
-    <screen><xsl:apply-templates select="str:split(., '&#xA;')" /></screen>
-  </xsl:template>
-
-  <xsl:template match="section[following::section]">
-    <section>
-      <xsl:apply-templates />
-      <screen><xsl:text>
-      </xsl:text></screen>        
-    </section>
-  </xsl:template>
-
-  <xsl:template match="*">
-    <xsl:element name="{name(.)}" namespace="{namespace-uri(.)}">
-      <xsl:copy-of select="namespace::*" />
-      <xsl:for-each select="@*">
-	<xsl:attribute name="{name(.)}" namespace="{namespace-uri(.)}">
-	  <xsl:value-of select="."/>
-	</xsl:attribute>
-      </xsl:for-each>
-      <xsl:apply-templates/>
-    </xsl:element>
-  </xsl:template>
-
-  <xsl:template match="text()">
-    <xsl:value-of select="translate(., '‘’“”—', concat(&quot;`'&quot;, '&quot;&quot;-'))" />
-  </xsl:template>
-  
-</xsl:stylesheet>

doc/manual/schemas.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0"?>
 <locatingRules xmlns="http://thaiopensource.com/ns/locating-rules/1.0">
-  <uri pattern="*.xml" typeId="DocBook"/>
+  <uri pathSuffix=".xml" typeId="DocBook"/>
 </locatingRules>

doc/manual/style.css

@@ -10,6 +10,7 @@ body
 {
     font-family: sans-serif;
     background: white;
+  
     margin: 2em 1em 2em 1em;
 }
 
@@ -33,33 +34,16 @@ h2 /* chapters, appendices, subtitle */
 div.chapter > div.titlepage h2, div.appendix > div.titlepage h2 
 { 
     margin-top: 1.5em;
+/*    border-top: solid #005aa0; */
 }
 
-div.section > div.titlepage h2 /* sections */
+div.sect1 h2 /* sections */
 {
     font-size: 150%;
-    margin-top: 1.5em;
-}
-
-h3 /* subsections */
-{
-    font-size: 125%;
-}
-
-div.simplesect h2
-{
-    font-size: 110%;
-}
-
-div.appendix h3
-{
-    font-size: 150%;
-    margin-top: 1.5em;
 }
 
 div.refnamediv h2, div.refsynopsisdiv h2, div.refsection h2 /* refentry parts */
 {
-    margin-top: 1.4em;
     font-size: 125%;
 }
 
@@ -68,23 +52,30 @@ div.refsection h3
     font-size: 110%;
 }
 
+h3 /* subsections */
+{
+    font-size: 125%;
+}
+
+
 
 /***************************************************************************
-                               Examples:
+                               Program listings:
  ***************************************************************************/
 
 div.example
 {
     border: 1px solid #6185a0;
     padding: 6px 6px;
-    margin-left: 1.5em;
-    margin-right: 1.5em;
-    background: #f4f4f8;
+    margin-left: 3em;
+    margin-right: 3em;
+    background: #eeeeee;
 }
 
-div.example p.title
+pre.programlisting
 {
-    margin-top: 0em;
+    color: #600000;
+    font-family: monospace;
 }
 
 
@@ -92,69 +83,39 @@ div.example p.title
                             Screen dumps:
  ***************************************************************************/
 
-pre.screen, pre.programlisting
+pre.screen
 {
     border: 1px solid #6185a0;
-    padding: 3px 3px;
-    margin-left: 1.5em;
-    margin-right: 1.5em;
+    padding: 6px 6px;
+    margin-left: 3em;
+    margin-right: 3em;
     color: #600000;
-    background: #f4f4f8;
+    background: #eeeeee;
     font-family: monospace;
     /* font-size: 90%; */
 }
 
-div.example pre.programlisting
-{
-    border: 0px;
-    padding: 0 0;
-    margin: 0 0 0 0;
-}
-
 
 /***************************************************************************
                                Notes, warnings etc:
  ***************************************************************************/
 
-.note, .warning
+.note,.warning
 {
     border: 1px solid #6185a0;
-    padding: 3px 3px;
-    margin-left: 1.5em;
-    margin-right: 1.5em;
-    margin-bottom: 1em;
-    padding: 0.3em 0.3em 0.3em 0.3em;
+    padding: 0px 1em;
     background: #fffff5;
 }
 
-div.note, div.warning
+div.note,div.warning
 {
     font-style: italic;
 }
 
-div.note h3, div.warning h3
+div.note h3,div.warning h3
 {
     color: red;
-    font-size: 100%;
-//    margin: 0 0 0 0;
-    padding-right: 0.5em;
-    display: inline;
-}
-
-div.note p, div.warning p
-{
-    margin-bottom: 0em;
-}
-
-div.note h3 + p, div.warning h3 + p
-{
-    display: inline;
-}
-
-div.note h3
-{
-    color: blue;
-    font-size: 100%;
+    text-decoration: underline;
 }
 
 div.navfooter *
@@ -187,7 +148,7 @@ a:hover { background: #ffffcd; }
                                Special elements:
  ***************************************************************************/
 
-tt, code
+tt
 {
     color: #400000;
 }
@@ -198,19 +159,9 @@ tt, code
     
 }
 
-div.variablelist dd p, div.glosslist dd p
+div.variablelist dd
 {
-    margin-top: 0em;
-}
-
-div.variablelist dd, div.glosslist dd
-{
-    margin-left: 1.5em;
-}
-
-div.glosslist dt
-{
-    font-style: italic;
+    margin-bottom: 1em;
 }
 
 .default
@@ -272,17 +223,4 @@ div.epigraph
 table.productionset table.productionset
 {
     font-family: monospace;
-}
-
-strong.command
-{
-//    font-family: monospace;
-//    font-style: italic;
-//    font-weight: normal;
-    color: #400000;
-}
-
-div.calloutlist td
-{
-    padding-bottom: 1em;
-}
+}

doc/manual/troubleshooting.xml

@@ -1,92 +1,14 @@
-<appendix xmlns="http://docbook.org/ns/docbook"
-          xmlns:xlink="http://www.w3.org/1999/xlink">
-
-<title>Troubleshooting</title>
-
-
-<para>This section provides solutions for some common problems.  See
-the <link xlink:href="http://bugs.strategoxt.org/browse/NIX">Nix
-bug tracker</link> for a list of currently known issues.</para>
-
-
-<section><title>Collisions in <command>nix-env</command></title>
-
-<para>Symptom: when installing or upgrading, you get an error message such as
-
-<screen>
-$ nix-env -i docbook-xml
-...
-adding /nix/store/s5hyxgm62gk2...-docbook-xml-4.2
-collission between `/nix/store/s5hyxgm62gk2...-docbook-xml-4.2/xml/dtd/docbook/calstblx.dtd'
-  and `/nix/store/06h377hr4b33...-docbook-xml-4.3/xml/dtd/docbook/calstblx.dtd'
-  at /nix/store/...-builder.pl line 62.</screen>
-
-</para>
-
-<para>The cause is that two installed packages in the user environment
-have overlapping filenames (e.g.,
-<filename>xml/dtd/docbook/calstblx.dtd</filename>.  This usually
-happens when you accidentally try to install two versions of the same
-package.  For instance, in the example above, the Nix Packages
-collection contains two versions of <literal>docbook-xml</literal>, so
-<command>nix-env -i</command> will try to install both.  The default
-user environment builder has no way to way to resolve such conflicts,
-so it just gives up.</para>
-
-<para>Solution: remove one of the offending packages from the user
-environment (if already installed) using <command>nix-env
--e</command>, or specify exactly which version should be installed
-(e.g., <literal>nix-env -i docbook-xml-4.2</literal>).</para>
-
-<para>Alternatively, you can modify the user environment builder
-script (in
-<filename><replaceable>prefix</replaceable>/share/nix/corepkgs/buildenv/builder.pl</filename>)
-to implement some conflict resolution policy.  E.g., the script could
-be modified to rename conflicting file names, or to pick one over the
-other.</para>
-
-</section>
-
-
-<section><title><quote>Too many links</quote> error in the Nix
-store</title>
-
-
-<para>Symptom: when building something, you get an error message such as
-
-<screen>
-...
-<literal>mkdir: cannot create directory `/nix/store/<replaceable>name</replaceable>': Too many links</literal></screen>
-
-</para>
-
-<para>This is usually because you have more than 32,000 subdirectories
-in <filename>/nix/store</filename>, as can be seen using <command>ls
--l</command>:
-
-<screen>
-$ ls -l /nix/store
-drwxrwxrwt 32000 nix nix 4620288 Sep 8 15:08 store</screen>
-
-The <literal>ext2</literal> file system is limited to a inode link
-count of 32,000 (each subdirectory increasing the count by one).
-Furthermore, the <literal>st_nlink</literal> field of the
-<function>stat</function> system call is a 16-bit value.</para>
-
-<para>This only happens on very large Nix installations (such as build
-machines).</para>
-
-<para>Quick solution: run the garbage collector.  You may want to use
-the <option>--max-links</option> option.</para>
-
-<para>Real solution: put the Nix store on a file system that supports
-more than 32,000 subdirectories per directory, such as ReiserFS.
-(This doesn’t solve the <literal>st_nlink</literal> limit, but
-ReiserFS lies to the kernel by reporting a link count of 1 if it
-exceeds the limit.)</para>
-
-</section>
-  
-
+<appendix>
+  <title>Troubleshooting</title>
 
+  <para>
+    (Nothing.)
+  </para>
+	
 </appendix>
+
+<!--
+local variables:
+sgml-parent-document: ("book.xml" "appendix")
+end:
+-->

doc/signing.txt

@@ -1,24 +0,0 @@
-Generate a private key:
-
-$ (umask 277 && openssl genrsa -out /nix/etc/nix/signing-key.sec 2048)
-
-The private key should be kept secret (only readable to the Nix daemon
-user).
-
-
-Generate the corresponding public key:
-
-$ openssl rsa -in /nix/etc/nix/signing-key.sec -pubout > /nix/etc/nix/signing-key.pub
-
-The public key should be copied to all machines to which you want to
-export store paths.
-
-
-Signing:
-
-$ nix-hash --type sha256 --flat svn.nar | openssl rsautl -sign -inkey mykey.sec > svn.nar.sign
-
-
-Verifying a signature:
-
-$ test "$(nix-hash --type sha256 --flat svn.nar)" = "$(openssl rsautl -verify -inkey mykey.pub -pubin -in svn.nar.sign)"

externals/Makefile.am

@@ -1,67 +1,73 @@
-# bzip2
+# Berkeley DB
 
-BZIP2 = bzip2-1.0.5
+DB = db-4.2.52
 
-$(BZIP2).tar.gz:
-	@echo "Nix requires bzip2 to build."
-	@echo "Please download version 1.0.5 from"
-	@echo "  http://www.bzip.org/1.0.5/bzip2-1.0.5.tar.gz"
+$(DB).tar.gz:
+	@echo "Nix requires Berkeley DB to build."
+	@echo "Please download version 4.2.52 from"
+	@echo "  http://www.sleepycat.com/update/snapshot/db-4.2.52.tar.gz"
 	@echo "and place it in the externals/ directory."
 	false
 
-$(BZIP2): $(BZIP2).tar.gz
-	gunzip < $(srcdir)/$(BZIP2).tar.gz | tar xvf -
+$(DB): $(DB).tar.gz
+	gunzip < $(DB).tar.gz | tar xvf -
 
-if HAVE_BZIP2
-build-bzip2:
+have-db:
+	$(MAKE) $(DB)
+	touch have-db
+
+if HAVE_BDB
+build-db:
 else
-build-bzip2: $(BZIP2)
-	(cd $(BZIP2) && \
-	$(MAKE) CC="$(CC)" && \
-	$(MAKE) install PREFIX=$(abs_builddir)/inst-bzip2)
-	touch build-bzip2
-
-install-exec-local:: build-bzip2
-	mkdir -p $(DESTDIR)${bzip2_bin}
-	$(INSTALL_PROGRAM) $(bzip2_bin_test)/bzip2 $(bzip2_bin_test)/bunzip2 $(DESTDIR)${bzip2_bin}
+build-db: have-db
+	(pfx=`pwd` && \
+	cd $(DB)/build_unix && \
+	CC="$(CC)" CXX="$(CXX)" CFLAGS="$(CFLAGS)" CXXFLAGS="$(CXXFLAGS)" \
+	 ../dist/configure --prefix=$$pfx/inst-bdb \
+	 --enable-cxx --disable-shared --disable-cryptography \
+         --disable-replication --disable-verify && \
+	make && \
+	make install)
+	touch build-db
 endif
 
 
-# SQLite
+# CWI ATerm
 
-SQLITE = sqlite-autoconf-$(SQLITE_VERSION)
-SQLITE_TAR = sqlite-autoconf-$(SQLITE_VERSION).tar.gz
+ATERM = aterm-2.0.5
 
-$(SQLITE_TAR):
-	@echo "Nix requires the SQLite library to build."
-	@echo "Please download version $(SQLITE_VERSION) from"
-	@echo "  http://www.sqlite.org/$(SQLITE_TAR)"
+$(ATERM).tar.gz:
+	@echo "Nix requires the CWI ATerm library to build."
+	@echo "Please download version 2.0.5 from"
+	@echo "  http://www.cwi.nl/projects/MetaEnv/aterm/aterm-2.0.5.tar.gz"
 	@echo "and place it in the externals/ directory."
 	false
 
-$(SQLITE): $(SQLITE_TAR)
-	gzip -d < $(srcdir)/$(SQLITE_TAR) | tar xvf -
+$(ATERM): $(ATERM).tar.gz
+	gunzip < $(ATERM).tar.gz | tar xvf -
 
-if HAVE_SQLITE
-build-sqlite:
+have-aterm:
+	$(MAKE) $(ATERM)
+	touch have-aterm
+
+if HAVE_ATERM
+build-aterm:
 else
-build-sqlite: $(SQLITE)
-	(cd $(SQLITE) && \
-	CC="$(CC)" CFLAGS="-DSQLITE_ENABLE_COLUMN_METADATA=1" ./configure --disable-static --prefix=$(pkglibdir)/dummy --libdir=${pkglibdir} $(SUB_CONFIGURE_FLAGS) && \
-	$(MAKE) )
-	touch build-sqlite
-
-install-exec-local:: build-sqlite
-	cd $(SQLITE) && $(MAKE) install
-	rm -rf "$(DESTDIR)/$(pkglibdir)/dummy"
+build-aterm: have-aterm
+	(pfx=`pwd` && \
+	cd $(ATERM) && \
+	CC="$(CC)" ./configure --prefix=$$pfx/inst-aterm \
+     --with-cflags="-DNDEBUG -DXGC_VERBOSE -DXHASHPEM -DWITH_STATS $(CFLAGS)" && \
+	make && \
+	make install)
+	touch build-aterm
 endif
 
 
-all: build-bzip2 build-sqlite
+all: build-db build-aterm
 
-EXTRA_DIST = $(BZIP2).tar.gz $(SQLITE_TAR)
+EXTRA_DIST = $(DB).tar.gz $(ATERM).tar.gz
 
-clean:
-	$(RM) -f build-bzip2 build-sqlite
-	$(RM) -rf $(BZIP2) $(SQLITE)
-	$(RM) -rf inst-bzip2
+ext-clean:
+	$(RM) -f have-db build-db have-aterm build-aterm
+	$(RM) -rf $(DB) $(ATERM)

make/examples/aterm/aterm/default.nix

@@ -1,30 +0,0 @@
-{sharedLib ? true}:
-
-rec {
-
-  inherit (import ../../../lib) compileC makeLibrary;
-
-  sources = [
-    ./afun.c
-    ./aterm.c
-    ./bafio.c
-    ./byteio.c
-    ./gc.c
-    ./hash.c
-    ./list.c
-    ./make.c
-    ./md5c.c
-    ./memory.c
-    ./tafio.c
-    ./version.c
-  ];
-
-  compile = main: compileC {inherit main sharedLib;};
-
-  libATerm = makeLibrary {
-    libraryName = "ATerm";
-    objects = map compile sources;
-    inherit sharedLib;
-  };
-
-}

make/examples/aterm/default.nix

@@ -1 +0,0 @@
-import test/default.nix

make/examples/aterm/test/default.nix

@@ -1,15 +0,0 @@
-with (import ../../../lib);
-
-let {
-  inherit (import ../aterm {}) libATerm;
-
-  compileTest = main: link {
-    objects = [(compileC {inherit main; localIncludePath = [ ../aterm ];})];
-    libraries = libATerm;
-  };
-
-  body = [
-    (compileTest ./fib.c)
-    (compileTest ./primes.c)
-  ];
-}

make/examples/default.nix

@@ -1,6 +0,0 @@
-[ (import ./trivial)
-  (import ./simple-header)
-  (import ./not-so-simple-header)
-  (import ./not-so-simple-header-auto)
-  (import ./aterm)
-]

make/examples/not-so-simple-header-auto/bar/hello.h

@@ -1 +0,0 @@
-#define WHAT "World"

make/examples/not-so-simple-header-auto/default.nix

@@ -1,13 +0,0 @@
-with import ../../lib;
-
-let {
-
-  hello = link {programName = "hello"; objects = compileC {
-    main = ./foo/hello.c;
-    localIncludes = "auto";
-  };};
-
-#  body = findIncludes {main = ./foo/hello.c;};
-
-  body = [hello];
-}

make/examples/not-so-simple-header-auto/foo/fnord/indirect.h

@@ -1,3 +0,0 @@
-#define HELLO "Hello"
-
-#include "../../bar/hello.h"

make/examples/not-so-simple-header-auto/foo/hello.c

@@ -1,9 +0,0 @@
-#include <stdio.h>
-
-#include "fnord/indirect.h"
-
-int main(int argc, char * * argv)
-{
-    printf(HELLO " " WHAT "\n");
-    return 0;
-}

make/examples/not-so-simple-header/bar/hello.h

@@ -1 +0,0 @@
-#define WHAT "World"

make/examples/not-so-simple-header/default.nix

@@ -1,14 +0,0 @@
-let {
-
-  inherit (import ../../lib) compileC link;
-
-  hello = link {programName = "hello"; objects = compileC {
-    main = ./foo/hello.c;
-    localIncludes = [
-      [./foo/fnord/indirect.h "fnord/indirect.h"]
-      [./bar/hello.h "fnord/../../bar/hello.h"]
-    ];
-  };};
-
-  body = [hello];
-}

make/examples/not-so-simple-header/foo/fnord/indirect.h

@@ -1,3 +0,0 @@
-#define HELLO "Hello"
-
-#include "../../bar/hello.h"

make/examples/not-so-simple-header/foo/hello.c

@@ -1,9 +0,0 @@
-#include <stdio.h>
-
-#include "fnord/indirect.h"
-
-int main(int argc, char * * argv)
-{
-    printf(HELLO " " WHAT "\n");
-    return 0;
-}

make/examples/simple-header/default.nix

@@ -1,11 +0,0 @@
-let {
-
-  inherit (import ../../lib) compileC link;
-
-  hello = link {objects = compileC {
-    main = ./hello.c;
-    localIncludes = [ [./hello.h "hello.h"] ];
-  };};
-
-  body = [hello];
-}

make/examples/simple-header/hello.c

@@ -1,9 +0,0 @@
-#include <stdio.h>
-
-#include "hello.h"
-
-int main(int argc, char * * argv)
-{
-    printf("Hello " WHAT "\n");
-    return 0;
-}

make/examples/simple-header/hello.h

@@ -1 +0,0 @@
-#define WHAT "World"

make/examples/trivial/default.nix

@@ -1,8 +0,0 @@
-let {
-
-  inherit (import ../../lib) compileC link;
-
-  hello = link {objects = compileC {main = ./hello.c;};};
-
-  body = [hello];
-}

make/examples/trivial/hello.c

@@ -1,7 +0,0 @@
-#include <stdio.h>
-
-int main(int argc, char * * argv)
-{
-    printf("Hello World\n");
-    return 0;
-}

make/lib/compile-c.sh

@@ -1,73 +0,0 @@
-. $stdenv/setup
-
-mainName=$(basename $main | cut -c34-)
-
-echo "compiling \`$mainName'..."
-
-# Turn $localIncludes into an array.
-localIncludes=($localIncludes)
-
-# Determine how many `..' levels appear in the header file references.
-# E.g., if there is some reference `../../foo.h', then we have to
-# insert two extra levels in the directory structure, so that `a.c' is
-# stored at `dotdot/dotdot/a.c', and a reference from it to
-# `../../foo.h' resolves to `dotdot/dotdot/../../foo.h' == `foo.h'.
-n=0
-maxDepth=0
-for ((n = 0; n < ${#localIncludes[*]}; n += 2)); do
-    target=${localIncludes[$((n + 1))]}
-
-    # Split the target name into path components using some IFS magic.
-    savedIFS="$IFS"
-    IFS=/
-    components=($target)
-    depth=0
-    for ((m = 0; m < ${#components[*]}; m++)); do
-        c=${components[m]}
-        if test "$c" = ".."; then
-            depth=$((depth + 1))
-        fi
-    done
-    IFS="$savedIFS"
-
-    if test $depth -gt $maxDepth; then
-        maxDepth=$depth;
-    fi
-done
-
-# Create the extra levels in the directory hierarchy.
-prefix=
-for ((n = 0; n < maxDepth; n++)); do
-    prefix="dotdot/$prefix"
-done
-
-# Create symlinks to the header files.
-for ((n = 0; n < ${#localIncludes[*]}; n += 2)); do
-    source=${localIncludes[n]}
-    target=${localIncludes[$((n + 1))]}
-
-    # Create missing directories.  We use IFS magic to split the path
-    # into path components.
-    savedIFS="$IFS"
-    IFS=/
-    components=($prefix$target)
-    fullPath=(.)
-    for ((m = 0; m < ${#components[*]} - 1; m++)); do
-        fullPath=("${fullPath[@]}" ${components[m]})
-        if ! test -d "${fullPath[*]}"; then
-            mkdir "${fullPath[*]}"
-        fi
-    done
-    IFS="$savedIFS"
-    
-    ln -sf $source $prefix$target
-done
-
-# Create a symlink to the main file.
-if ! test "$(readlink $prefix$mainName)" = $main; then
-    ln -s $main $prefix$mainName
-fi
-
-mkdir $out
-test "$prefix" && cd $prefix
-gcc -Wall $cFlags -c $mainName -o $out/$mainName.o

make/lib/default.nix

@@ -1,69 +0,0 @@
-rec {
-
-  # Should point at your Nixpkgs installation.
-  pkgPath = ./pkgs;
-
-  pkgs = import (pkgPath + /system/all-packages.nix) {};
-
-  stdenv = pkgs.stdenv;
-  
-
-  compileC =
-  { main
-  , localIncludes ? "auto"
-  , localIncludePath ? []
-  , cFlags ? ""
-  , sharedLib ? false
-  }:
-  stdenv.mkDerivation {
-    name = "compile-c";
-    builder = ./compile-c.sh;
-    
-    localIncludes =
-      if localIncludes == "auto" then
-        dependencyClosure {
-          scanner = main:
-            import (findIncludes {
-              inherit main;
-            });
-          searchPath = localIncludePath;
-          startSet = [main];
-        }
-      else
-        localIncludes;
-        
-    inherit main;
-    
-    cFlags = [
-      cFlags
-      (if sharedLib then ["-fpic"] else [])
-      (map (p: "-I" + (relativise (dirOf main) p)) localIncludePath)
-    ];
-  };
-
-  
-  findIncludes = {main}: stdenv.mkDerivation {
-    name = "find-includes";
-    realBuilder = pkgs.perl ~ "bin/perl";
-    args = [ ./find-includes.pl ];
-    inherit main;
-  };
-
-    
-  link = {objects, programName ? "program", libraries ? []}: stdenv.mkDerivation {
-    name = "link";
-    builder = ./link.sh;
-    inherit objects programName libraries;
-  };
-
-  
-  makeLibrary = {objects, libraryName ? [], sharedLib ? false}:
-  # assert sharedLib -> fold (obj: x: assert obj.sharedLib && x) false objects
-  stdenv.mkDerivation {
-    name = "library";
-    builder = ./make-library.sh;
-    inherit objects libraryName sharedLib;
-  };
-
-  
-}

make/lib/find-includes.pl

@@ -1,21 +0,0 @@
-use strict;
-
-my $root = $ENV{"main"};
-my $out = $ENV{"out"};
-
-open OUT, ">$out" or die "$!";
-print OUT "[\n";
-
-open IN, "<$root" or die "$!";
-while (<IN>) {
-    if (/^\#include\s+\"(.*)\"/) {
-        print OUT "\"$1\"\n";
-    }
-    if (/^\#include\s+\<(.*)\>/) {
-        print OUT "\"$1\"\n";
-    }
-}
-close IN;
-
-print OUT "]\n";
-close OUT;

make/lib/link.sh

@@ -1,21 +0,0 @@
-. $stdenv/setup
-
-shopt -s nullglob
-
-objs=
-for i in $objects; do
-    obj=$(echo $i/*.o)
-    objs="$objs $obj"
-done
-
-libs=
-for i in $libraries; do
-    lib=$(echo $i/*.a; echo $i/*.so)
-    name=$(echo $(basename $lib) | sed -e 's/^lib//' -e 's/.a$//' -e 's/.so$//')
-    libs="$libs -L$(dirname $lib) -l$name" 
-done
-
-echo "linking object files into \`$programName'..."
-
-mkdir $out
-gcc -o $out/$programName $objs $libs

make/lib/make-library.sh

@@ -1,28 +0,0 @@
-. $stdenv/setup
-
-objs=
-for i in $objects; do
-    obj=$(echo $i/*.o)
-    objs="$objs $obj"
-done
-
-echo "archiving object files into library \`$libraryName'..."
-
-ensureDir $out
-
-if test -z "$sharedLib"; then
-
-    outPath=$out/lib${libraryName}.a
-
-    ar crs $outPath $objs
-    ranlib $outPath
-
-else
-
-    outPath=$out/lib${libraryName}.so
-
-    gcc -shared -o $outPath $objs
-
-fi    
-
-    

misc/Makefile.am

@@ -1 +0,0 @@
-SUBDIRS = emacs

misc/emacs/Makefile.am

@@ -1,5 +0,0 @@
-EXTRA_DIST = nix-mode.el
-
-install-data-local:
-	$(INSTALL) -d $(DESTDIR)$(datadir)/emacs/site-lisp
-	$(INSTALL_DATA) $(srcdir)/nix-mode.el $(DESTDIR)$(datadir)/emacs/site-lisp

misc/emacs/README

@@ -1,10 +0,0 @@
-The Nix Emacs mode supports syntax highlighting, somewhat sensible
-indenting, and refilling of comments.
-
-To enable Nix mode in Emacs, add something like this to your ~/.emacs
-file:
-
-  (load "/nix/share/emacs/site-lisp/nix-mode.el")
-
-This automatically causes Nix mode to be activated for all files with
-extension `.nix'.

misc/emacs/nix-mode.el

@@ -1,109 +0,0 @@
-(defun nix-mode ()
-  "Major mode for editing Nix expressions.
-
-The following commands may be useful:
-
-  '\\[newline-and-indent]'
-    Insert a newline and move the cursor to align with the previous
-    non-empty line.
-
-  '\\[fill-paragraph]'
-    Refill a paragraph so that all lines are at most `fill-column'
-    lines long.  This should do the right thing for comments beginning
-    with `#'.  However, this command doesn't work properly yet if the
-    comment is adjacent to code (i.e., no intervening empty lines).
-    In that case, select the text to be refilled and use
-    `\\[fill-region]' instead.
-
-The hook `nix-mode-hook' is run when Nix mode is started.
-
-\\{nix-mode-map}
-"
-
-  (interactive)
-  
-  (kill-all-local-variables)
-  
-  (setq major-mode 'nix-mode)
-  (setq mode-name "Nix")
-
-  (use-local-map nix-mode-map)
-
-  (set-syntax-table nix-mode-syntax-table)
-
-  ;; Font lock support.
-  (setq font-lock-defaults '(nix-keywords nil nil nil nil))
-
-  ;; Automatic indentation [C-j].
-  (make-local-variable 'indent-line-function)
-  (setq indent-line-function 'nix-indent-line)
-
-  ;; Indenting of comments.
-  (make-local-variable 'comment-start)
-  (setq comment-start "# ")
-  (make-local-variable 'comment-end)
-  (setq comment-end "")
-  (make-local-variable 'comment-start-skip)
-  (setq comment-start-skip "\\(^\\|\\s-\\);?#+ *")
-
-  ;; Filling of comments.
-  (make-local-variable 'adaptive-fill-mode)
-  (setq adaptive-fill-mode t)
-  (make-local-variable 'paragraph-start)
-  (setq paragraph-start "[ \t]*\\(#+[ \t]*\\)?$")
-  (make-local-variable 'paragraph-separate)
-  (setq paragraph-separate paragraph-start)
-  
-  (run-hooks 'nix-mode-hook)
-  )
-
-
-(defvar nix-mode-map nil
-  "Keymap for Nix mode.")
-
-(setq nix-mode-map (make-sparse-keymap))
-;(define-key nix-mode-map [tab] 'tab-to-tab-stop)
-
-
-(defvar nix-keywords
-  '("\\<if\\>" "\\<then\\>" "\\<else\\>" "\\<assert\\>" "\\<with\\>"
-    "\\<let\\>" "\\<in\\>" "\\<rec\\>" "\\<inherit\\>"
-    ("\\<true\\>" . font-lock-builtin-face)
-    ("\\<false\\>" . font-lock-builtin-face)
-    ("\\<null\\>" . font-lock-builtin-face)
-    ("\\<import\\>" . font-lock-builtin-face)
-    ("\\<derivation\\>" . font-lock-builtin-face)
-    ("\\<baseNameOf\\>" . font-lock-builtin-face)
-    ("\\<toString\\>" . font-lock-builtin-face)
-    ("\\<isNull\\>" . font-lock-builtin-face)
-    ("[a-zA-Z][a-zA-Z0-9\\+-\\.]*:[a-zA-Z0-9%/\\?:@&=\\+\\$,_\\.!~\\*'-]+"
-     . font-lock-constant-face)
-    ("\\<\\([a-zA-Z_][a-zA-Z0-9_'\.]*\\)[ \t]*="
-     (1 font-lock-variable-name-face nil nil))
-    ("[a-zA-Z0-9._\\+-]*\\(/[a-zA-Z0-9._\\+-]+\\)+"
-     . font-lock-constant-face)
-    ))
-
-
-(defvar nix-mode-syntax-table nil
-  "Syntax table for Nix mode.")
-
-(if nix-mode-syntax-table
-    nil
-    (progn
-      (setq nix-mode-syntax-table (make-syntax-table))
-      (modify-syntax-entry ?/ ". 14" nix-mode-syntax-table)
-      (modify-syntax-entry ?* ". 23" nix-mode-syntax-table)
-      (modify-syntax-entry ?# "< b" nix-mode-syntax-table)
-      (modify-syntax-entry ?\n "> b" nix-mode-syntax-table)
-      ))
-
-
-(defun nix-indent-line ()
-  "Indent current line in a Nix expression."
-  (interactive)
-  (indent-relative-maybe))
-
-
-(setq auto-mode-alist (cons '("\\.nix\\'" . nix-mode) auto-mode-alist))
-(setq auto-mode-alist (cons '("\\.nix.in\\'" . nix-mode) auto-mode-alist))

misc/vim/syntax/nix.vim

@@ -1,37 +0,0 @@
-" Vim syntax file
-" Language:	nix
-" Maintainer:	Marc Weber <marco-oweber@gmx.de>
-"               Modify and commit if you feel that way
-" Last Change:	2007 Dec
-
-" Quit when a (custom) syntax file was already loaded
-if exists("b:current_syntax")
-  finish
-endif
-
-syn keyword	nixKeyword	let throw inherit import true false null with
-syn keyword	nixConditional	if else then
-syn keyword     nixBrace        ( ) { } =
-syn keyword     nixBuiltin         __currentSystem __currentTime __isFunction __getEnv __trace __toPath __pathExists 
-  \ __readFile __toXML __toFile __filterSource __attrNames __getAttr __hasAttr __isAttrs __listToAttrs __isList 
-  \ __head __tail __add __sub __lessThan __substring __stringLength
-
-syn match nixAttr "\w\+\ze\s*="
-syn match nixFuncArg "\zs\w\+\ze\s*:"
-syn region nixStringParam start=+\${+ end=+}+
-syn region nixMultiLineComment start=+/\*+ skip=+\\"+ end=+\*/+
-syn match  nixEndOfLineComment "#.*$"
-syn region nixStringIndented start=+''+ skip=+'''\|''${\|"+ end=+''+ contains=nixStringParam
-syn region nixString         start=+"+ skip=+\\"+ end=+"+ contains=nixStringParam
-
-hi def link nixKeyword       Keyword
-hi def link nixConditional   Conditional
-hi def link nixBrace         Special
-hi def link nixString        String
-hi def link nixStringIndented String
-hi def link nixBuiltin       Special
-hi def link nixStringParam   Macro
-hi def link nixMultiLineComment Comment
-hi def link nixEndOfLineComment Comment
-hi def link nixAttr        Identifier
-hi def link nixFuncArg     Identifier

nix.conf.example

@@ -1,181 +0,0 @@
-### Option `gc-keep-outputs'
-#
-# If `true', the garbage collector will keep the outputs of
-# non-garbage derivations.  If `false' (default), outputs will be
-# deleted unless they are GC roots themselves (or reachable from other
-# roots).
-# 
-# In general, outputs must be registered as roots separately.
-# However, even if the output of a derivation is registered as a root,
-# the collector will still delete store paths that are used only at
-# build time (e.g., the C compiler, or source tarballs downloaded from
-# the network).  To prevent it from doing so, set this option to
-# `true'.
-#gc-keep-outputs = false
-
-
-### Option `gc-keep-derivations'
-#
-# If `true' (default), the garbage collector will keep the derivations
-# from which non-garbage store paths were built.  If `false', they
-# will be deleted unless explicitly registered as a root (or reachable
-# from other roots).
-#
-# Keeping derivation around is useful for querying and traceability
-# (e.g., it allows you to ask with what dependencies or options a
-# store path was built), so by default this option is on.  Turn it off
-# to safe a bit of disk space (or a lot if `gc-keep-outputs' is also
-# turned on).
-#gc-keep-derivations = true
-
-
-### Option `env-keep-derivations'
-#
-# If `false' (default), derivations are not stored in Nix user
-# environments.  That is, the derivation any build-time-only
-# dependencies may be garbage-collected.
-#
-# If `true', when you add a Nix derivation to a user environment, the
-# path of the derivation is stored in the user environment.  Thus, the
-# derivation will not be garbage-collected until the user environment
-# generation is deleted (`nix-env --delete-generations').  To prevent
-# build-time-only dependencies from being collected, you should also
-# turn on `gc-keep-outputs'.
-#
-# The difference between this option and `gc-keep-derivations' is that
-# this one is `sticky': it applies to any user environment created
-# while this option was enabled, while `gc-keep-derivations' only
-# applies at the moment the garbage collector is run.
-#env-keep-derivations = false
-
-
-### Option `build-max-jobs'
-#
-# This option defines the maximum number of jobs that Nix will try to
-# build in parallel.  The default is 1.  You should generally set it
-# to the number of CPUs in your system (e.g., 2 on a Athlon 64 X2).
-# It can be overriden using the `--max-jobs' / `-j' command line
-# switch.
-#build-max-jobs = 1
-
-
-### Option `build-cores'
-#
-# This option defines the number of CPU cores to utilize in parallel
-# within a build job, i.e. by passing an appropriate `-jN' flag to GNU
-# Make. The default is 1, meaning that parallel building within jobs
-# is disabled.  Passing the special value `0' causes Nix to try and
-# auto-detect the number of available cores on the local host.  This
-# setting can be overridden using the `--cores' command line switch.
-#build-cores = 1
-
-
-### Option `build-max-silent-time'
-#
-# This option defines the maximum number of seconds that a builder can
-# go without producing any data on standard output or standard error.
-# This is useful (for instance in a automated build system) to catch
-# builds that are stuck in an infinite loop, or to catch remote builds
-# that are hanging due to network problems.  It can be overriden using
-# the `--max-silent-time' command line switch.
-#
-# The value 0 means that there is no timeout.  This is also the
-# default.
-#
-# Example:
-#   build-max-silent-time = 600 # = 10 minutes
-#build-max-silent-time = 0
-
-
-### Option `build-users-group'
-#
-# This options specifies the Unix group containing the Nix build user
-# accounts.  In multi-user Nix installations, builds should not
-# be performed by the Nix account since that would allow users to
-# arbitrarily modify the Nix store and database by supplying specially
-# crafted builders; and they cannot be performed by the calling user
-# since that would allow him/her to influence the build result.
-#
-# Therefore, if this option is non-empty and specifies a valid group,
-# builds will be performed under the user accounts that are a member
-# of the group specified here (as listed in /etc/group).  Those user
-# accounts should not be used for any other purpose!
-#
-# Nix will never run two builds under the same user account at the
-# same time.  This is to prevent an obvious security hole: a malicious
-# user writing a Nix expression that modifies the build result of a
-# legitimate Nix expression being built by another user.  Therefore it
-# is good to have as many Nix build user accounts as you can spare.
-# (Remember: uids are cheap.)
-#
-# The build users should have permission to create files in the Nix
-# store, but not delete them.  Therefore, /nix/store should be owned
-# by the Nix account, its group should be the group specified here,
-# and its mode should be 1775.
-#
-# If the build users group is empty, builds will be performed under
-# the uid of the Nix process (that is, the uid of the caller if
-# $NIX_REMOTE is empty, the uid under which the Nix daemon runs if
-# $NIX_REMOTE is `daemon', or the uid that owns the setuid nix-worker
-# program if $NIX_REMOTE is `slave').  Obviously, this should not be
-# used in multi-user settings with untrusted users.
-#
-# The default is empty.
-#
-# Example:
-#   build-users-group = nix-builders
-#build-users-group =
-
-
-### Option `build-use-chroot'
-#
-# If set to `true', builds will be performed in a chroot environment,
-# i.e., the build will be isolated from the normal file system
-# hierarchy and will only see the Nix store, the temporary build
-# directory, and the directories configured with the
-# `build-chroot-dirs' option (such as /proc and /dev).  This is useful
-# to prevent undeclared dependencies on files in directories such as
-# /usr/bin.
-#
-# The use of a chroot requires that Nix is run as root (but you can
-# still use the "build users" feature to perform builds under
-# different users than root).  Currently, chroot builds only work on
-# Linux because Nix uses "bind mounts" to make the Nix store and other
-# directories available inside the chroot.
-#
-# The default is `false'.
-#
-# Example:
-#   build-use-chroot = true
-#build-use-chroot = false
-
-
-### Option `build-chroot-dirs'
-#
-# When builds are performed in a chroot environment, Nix will mount
-# (using `mount --bind' on Linux) some directories from the normal
-# file system hierarchy inside the chroot.  These are the Nix store,
-# the temporary build directory (usually /tmp/nix-<pid>-<number>) and
-# the directories listed here.  The default is "/dev /dev/pts /proc".
-# Files in /dev (such as /dev/null) are needed by many builds, and
-# some files in /proc may also be needed occasionally.
-#
-# Example:
-#   build-use-chroot = /dev /proc /bin
-#build-chroot-dirs = /dev /dev/pts /proc
-
-
-### Option `build-cache-failure'
-#
-# If this option is enabled, Nix will do negative caching; that is, it
-# will remember failed builds, and won't attempt to try to build them
-# again if you ask for it.  Negative caching is disabled by default
-# because Nix cannot distinguish between permanent build errors (e.g.,
-# a syntax error in a source file) and transient build errors (e.g., a
-# full disk), as they both cause the builder to return a non-zero exit
-# code.  You can clear the cache by doing `rm -f
-# /nix/var/nix/db/failed/*'.
-#
-# Example:
-#   build-cache-failure = true
-#build-cache-failure = false

nix.spec.in

@@ -1,83 +1,44 @@
-%define enable_setuid ""
-%define nix_user "nix"
-%define nix_group "nix"
-
-# If set, the Nix user and group will be created by the RPM
-# pre-install script.
-%define nix_user_uid ""
-%define nix_group_gid ""
-
 Summary: The Nix software deployment system
 Name: nix
 Version: @version@
 Release: 1
 License: GPL
-Group: Software Deployment
-URL: http://nixos.org/
-Source0: %{name}-@version@.tar.bz2
+Group: WeetNiet
+URL: http://www.cs.uu.nl/groups/ST/twiki/bin/view/Trace/NixDeploymentSystem
+Source0: %{name}-@version@.tar.gz
 BuildRoot: %{_tmppath}/%{name}-%{version}-buildroot
-Prefix: /usr
+%define _prefix /nix
+Prefix: %{_prefix}
 Requires: /usr/bin/perl
-Requires: curl
 
-# Hack to make that shitty RPM scanning hack shut up.
-Provides: perl(readmanifest)
-                                                               
 %description
 
-Nix is a purely functional package manager. It allows multiple
-versions of a package to be installed side-by-side, ensures that
-dependency specifications are complete, supports atomic upgrades and
-rollbacks, allows non-root users to install software, and has many
-other features. It is the basis of the NixOS Linux distribution, but
-it can be used equally well under other Unix systems.
+Nix is a software deployment system.
 
 %prep
 %setup -q
 
 %build
-extraFlags=
-if test -n "%{enable_setuid}"; then
-    extraFlags="$extraFlags --enable-setuid"
-    if test -n "%{nix_user}"; then
-        extraFlags="$extraFlags --with-nix-user=%{nix_user}"
-    fi
-    if test -n "%{nix_group}"; then
-        extraFlags="$extraFlags --with-nix-group=%{nix_group}"
-    fi
-fi
-./configure --prefix=%{_prefix} --sysconfdir=/etc $extraFlags
+./configure --prefix=%{_prefix}
 make
-make check
 
 %install
 rm -rf $RPM_BUILD_ROOT
 make DESTDIR=$RPM_BUILD_ROOT install
-rm $RPM_BUILD_ROOT/etc/nix/nix.conf
 strip $RPM_BUILD_ROOT/%{_prefix}/bin/* || true
 
 %clean
 rm -rf $RPM_BUILD_ROOT
 
-%pre
-if test -n "%{nix_group_gid}"; then
-    /usr/sbin/groupadd -g %{nix_group_gid} %{nix_group} || true
-fi
-if test -n "%{nix_user_uid}"; then
-    /usr/sbin/useradd -c "Nix" -u %{nix_user_uid} \
-        -s /sbin/nologin -r -d /var/empty %{nix_user} \
-        -g %{nix_group} || true
-fi
-
 %files
-#%defattr(-,root,root)
+%defattr(-,root,root)
 %{_prefix}/bin
-%{_prefix}/lib
 %{_prefix}/libexec
-%{_prefix}/include
+%{_prefix}/var
 %{_prefix}/share
-/etc/profile.d/nix.sh
-/nix/var
-/nix/store
+%{_prefix}/man
+%{_prefix}/store
 %config
-/etc/nix
+%{_prefix}/etc
+#%doc
+#%{_prefix}/share/nix/manual

release.nix

@@ -1,177 +0,0 @@
-{ nixpkgs ? ../nixpkgs
-, nix ? { outPath = ./.; rev = 1234; }
-, officialRelease ? false
-}:
-
-let
-
-  jobs = rec {
-
-
-    tarball =
-      with import nixpkgs {};
-
-      releaseTools.sourceTarball {
-        name = "nix-tarball";
-        version = builtins.readFile ./version;
-        src = nix;
-        inherit officialRelease;
-
-        buildInputs =
-          [ curl bison24 flex2535 perl libxml2 libxslt w3m bzip2
-            tetex dblatex nukeReferences pkgconfig
-          ];
-
-        configureFlags = ''
-          --with-docbook-rng=${docbook5}/xml/rng/docbook
-          --with-docbook-xsl=${docbook5_xsl}/xml/xsl/docbook
-          --with-xml-flags=--nonet
-        '';
-
-        # Include the Bzip2 tarball in the distribution.
-        preConfigure = ''
-          stripHash ${bzip2.src}
-          cp -pv ${bzip2.src} externals/$strippedName
-
-          stripHash ${sqlite.src}
-          cp -pv ${sqlite.src} externals/$strippedName
-
-          # TeX needs a writable font cache.
-          export VARTEXFONTS=$TMPDIR/texfonts
-        '';
-
-        preDist = ''
-          make -C doc/manual install prefix=$out
-          
-          make -C doc/manual manual.pdf prefix=$out
-          cp doc/manual/manual.pdf $out/manual.pdf
-
-          # The PDF containes filenames of included graphics (see
-          # http://www.tug.org/pipermail/pdftex/2007-August/007290.html).
-          # This causes a retained dependency on dblatex, which Hydra
-          # doesn't like (the output of the tarball job is distributed
-          # to Windows and Macs, so there should be no Linux binaries
-          # in the closure).
-          nuke-refs $out/manual.pdf
-          
-          echo "doc manual $out/share/doc/nix/manual" >> $out/nix-support/hydra-build-products
-          echo "doc-pdf manual $out/manual.pdf" >> $out/nix-support/hydra-build-products
-          echo "doc release-notes $out/share/doc/nix/release-notes" >> $out/nix-support/hydra-build-products
-        '';
-      };
-
-
-    build =
-      { system ? "i686-linux" }:
-
-      with import nixpkgs { inherit system; };
-
-      releaseTools.nixBuild {
-        name = "nix";
-        src = tarball;
-
-        buildInputs = [ curl perl bzip2 openssl pkgconfig boehmgc ];
-
-        configureFlags = ''
-          --disable-init-state
-          --with-bzip2=${bzip2} --with-sqlite=${sqlite}
-          --enable-gc
-        '';
-      };
-
-
-    coverage =
-      with import nixpkgs { system = "x86_64-linux"; };
-
-      releaseTools.coverageAnalysis {
-        name = "nix-build";
-        src = tarball;
-
-        buildInputs =
-          [ curl perl bzip2 openssl
-            # These are for "make check" only:
-            graphviz libxml2 libxslt
-          ];
-
-        configureFlags = ''
-          --disable-init-state --disable-shared
-          --with-bzip2=${bzip2} --with-sqlite=${sqlite}
-        '';
-
-        lcovFilter = [ "*/boost/*" "*-tab.*" ];
-
-        # We call `dot', and even though we just use it to
-        # syntax-check generated dot files, it still requires some
-        # fonts.  So provide those.
-        FONTCONFIG_FILE = texFunctions.fontsConf;
-      };
-
-      
-    rpm_fedora5i386 = makeRPM_i686 (diskImages: diskImages.fedora5i386) 10;
-    rpm_fedora9i386 = makeRPM_i686 (diskImages: diskImages.fedora9i386) 20;
-    rpm_fedora9x86_64 = makeRPM_x86_64 (diskImages: diskImages.fedora9x86_64) 20;
-    rpm_fedora10i386 = makeRPM_i686 (diskImages: diskImages.fedora10i386) 30;
-    rpm_fedora10x86_64 = makeRPM_x86_64 (diskImages: diskImages.fedora10x86_64) 30;
-    rpm_fedora11i386 = makeRPM_i686 (diskImages: diskImages.fedora11i386) 40;
-    rpm_fedora11x86_64 = makeRPM_x86_64 (diskImages: diskImages.fedora11x86_64) 40;
-    rpm_fedora12i386 = makeRPM_i686 (diskImages: diskImages.fedora12i386) 50;
-    rpm_fedora12x86_64 = makeRPM_x86_64 (diskImages: diskImages.fedora12x86_64) 50;
-    rpm_opensuse103i386 = makeRPM_i686 (diskImages: diskImages.opensuse103i386) 40;
-    rpm_opensuse110i386 = makeRPM_i686 (diskImages: diskImages.opensuse110i386) 50;
-    rpm_opensuse110x86_64 = makeRPM_x86_64 (diskImages: diskImages.opensuse110x86_64) 50;
-
-    
-    deb_debian40i386 = makeDeb_i686 (diskImages: diskImages.debian40i386) 40;
-    deb_debian40x86_64 = makeDeb_x86_64 (diskImages: diskImages.debian40x86_64) 40;
-    deb_debian50i386 = makeDeb_i686 (diskImages: diskImages.debian50i386) 50;
-    deb_debian50x86_64 = makeDeb_x86_64 (diskImages: diskImages.debian50x86_64) 50;
-    deb_ubuntu804i386 = makeDeb_i686 (diskImages: diskImages.ubuntu804i386) 20;
-    deb_ubuntu804x86_64 = makeDeb_x86_64 (diskImages: diskImages.ubuntu804x86_64) 20;
-    deb_ubuntu810i386 = makeDeb_i686 (diskImages: diskImages.ubuntu810i386) 30;
-    deb_ubuntu810x86_64 = makeDeb_x86_64 (diskImages: diskImages.ubuntu810x86_64) 30;
-    deb_ubuntu904i386 = makeDeb_i686 (diskImages: diskImages.ubuntu904i386) 40;
-    deb_ubuntu904x86_64 = makeDeb_x86_64 (diskImages: diskImages.ubuntu904x86_64) 40;
-    deb_ubuntu910i386 = makeDeb_i686 (diskImages: diskImages.ubuntu910i386) 50;
-    deb_ubuntu910x86_64 = makeDeb_x86_64 (diskImages: diskImages.ubuntu910x86_64) 50;
-
-
-  };
-
-
-  makeRPM_i686 = makeRPM "i686-linux";
-  makeRPM_x86_64 = makeRPM "x86_64-linux";
-
-  makeRPM = 
-    system: diskImageFun: prio:
-
-    with import nixpkgs { inherit system; };
-
-    releaseTools.rpmBuild rec {
-      name = "nix-rpm-${diskImage.name}";
-      src = jobs.tarball;
-      diskImage = diskImageFun vmTools.diskImages;
-      memSize = 1024;
-      meta.schedulingPriority = prio;
-    };
-
-
-  makeDeb_i686 = makeDeb "i686-linux";
-  makeDeb_x86_64 = makeDeb "x86_64-linux";
-  
-  makeDeb =
-    system: diskImageFun: prio:
-
-    with import nixpkgs { inherit system; };
-
-    releaseTools.debBuild {
-      name = "nix-deb";
-      src = jobs.tarball;
-      diskImage = diskImageFun vmTools.diskImages;
-      memSize = 1024;
-      meta.schedulingPriority = prio;
-      configureFlags = "--sysconfdir=/etc";
-      debRequires = [ "curl" ];
-    };
-
-
-in jobs

scripts/GeneratePatches.pm.in

@@ -1,334 +0,0 @@
-#! @perl@ -w -I@libexecdir@/nix
-
-use strict;
-use File::Temp qw(tempdir);
-
-
-# Some patch generations options.
-
-# Max size of NAR archives to generate patches for.
-my $maxNarSize = $ENV{"NIX_MAX_NAR_SIZE"};
-$maxNarSize = 160 * 1024 * 1024 if !defined $maxNarSize;
-
-# If patch is bigger than this fraction of full archive, reject.
-my $maxPatchFraction = $ENV{"NIX_PATCH_FRACTION"};
-$maxPatchFraction = 0.60 if !defined $maxPatchFraction;
-
-my $timeLimit = $ENV{"NIX_BSDIFF_TIME_LIMIT"};
-$timeLimit = 180 if !defined $timeLimit;
-
-my $hashAlgo = "sha256";
-
-
-sub findOutputPaths {
-    my $narFiles = shift;
-
-    my %outPaths;
-    
-    foreach my $p (keys %{$narFiles}) {
-
-        # Ignore derivations.
-        next if ($p =~ /\.drv$/);
-        
-        # Ignore builders (too much ambiguity -- they're all called
-        # `builder.sh').
-        next if ($p =~ /\.sh$/);
-        next if ($p =~ /\.patch$/);
-        
-        # Don't bother including tar files etc.
-        next if ($p =~ /\.tar$/ || $p =~ /\.tar\.(gz|bz2|Z|lzma|xz)$/ || $p =~ /\.zip$/ || $p =~ /\.bin$/ || $p =~ /\.tgz$/ || $p =~ /\.rpm$/ || $p =~ /cvs-export$/ || $p =~ /fetchhg$/);
-
-        $outPaths{$p} = 1;
-    }
-
-    return %outPaths;
-}
-
-
-sub getNameVersion {
-    my $p = shift;
-    $p =~ /\/[0-9a-z]+((?:-[a-zA-Z][^\/-]*)+)([^\/]*)$/;
-    my $name = $1;
-    my $version = $2;
-    return undef unless defined $name && defined $version;
-    $name =~ s/^-//;
-    $version =~ s/^-//;
-    return ($name, $version);
-}
-
-
-# A quick hack to get a measure of the `distance' between two
-# versions: it's just the position of the first character that differs
-# (or 999 if they are the same).
-sub versionDiff {
-    my $s = shift;
-    my $t = shift;
-    my $i;
-    return 999 if $s eq $t;
-    for ($i = 0; $i < length $s; $i++) {
-        return $i if $i >= length $t or
-            substr($s, $i, 1) ne substr($t, $i, 1);
-    }
-    return $i;
-}
-
-
-sub getNarBz2 {
-    my $narPath = shift;
-    my $narFiles = shift;
-    my $storePath = shift;
-    
-    my $narFileList = $$narFiles{$storePath};
-    die "missing path $storePath" unless defined $narFileList;
-
-    my $narFile = @{$narFileList}[0];
-    die unless defined $narFile;
-
-    $narFile->{url} =~ /\/([^\/]+)$/;
-    die unless defined $1;
-    return "$narPath/$1";
-}
-
-
-sub containsPatch {
-    my $patches = shift;
-    my $storePath = shift;
-    my $basePath = shift;
-    my $patchList = $$patches{$storePath};
-    return 0 if !defined $patchList;
-    my $found = 0;
-    foreach my $patch (@{$patchList}) {
-        # !!! baseHash might differ
-        return 1 if $patch->{basePath} eq $basePath;
-    }
-    return 0;
-}
-
-
-sub generatePatches {
-    my ($srcNarFiles, $dstNarFiles, $srcPatches, $dstPatches, $narPath, $patchesPath, $patchesURL, $tmpDir) = @_;
-
-    my %srcOutPaths = findOutputPaths $srcNarFiles;
-    my %dstOutPaths = findOutputPaths $dstNarFiles;
-
-    # For each output path in the destination, see if we need to / can
-    # create a patch.
-
-    print STDERR "creating patches...\n";
-
-    foreach my $p (keys %dstOutPaths) {
-
-        # If exactly the same path already exists in the source, skip it.
-        next if defined $srcOutPaths{$p};
-    
-        print "  $p\n";
-
-        # If not, then we should find the paths in the source that are
-        # `most' likely to be present on a system that wants to
-        # install this path.
-
-        (my $name, my $version) = getNameVersion $p;
-        next unless defined $name && defined $version;
-
-        my @closest = ();
-        my $closestVersion;
-        my $minDist = -1; # actually, larger means closer
-
-        # Find all source paths with the same name.
-
-        foreach my $q (keys %srcOutPaths) {
-            (my $name2, my $version2) = getNameVersion $q;
-            next unless defined $name2 && defined $version2;
-
-            if ($name eq $name2) {
-
-                my $srcSystem = @{$$dstNarFiles{$p}}[0]->{system};
-                my $dstSystem = @{$$srcNarFiles{$q}}[0]->{system};
-                if (defined $srcSystem && defined $dstSystem && $srcSystem ne $dstSystem) {
-                    print "    SKIPPING $q due to different systems ($srcSystem vs. $dstSystem)\n";
-                    next;
-                }
-
-                # If the sizes differ too much, then skip.  This
-                # disambiguates between, e.g., a real component and a
-                # wrapper component (cf. Firefox in Nixpkgs).
-                my $srcSize = @{$$srcNarFiles{$q}}[0]->{size};
-                my $dstSize = @{$$dstNarFiles{$p}}[0]->{size};
-                my $ratio = $srcSize / $dstSize;
-                $ratio = 1 / $ratio if $ratio < 1;
-                # print "  SIZE $srcSize $dstSize $ratio $q\n";
-
-                if ($ratio >= 3) {
-                    print "    SKIPPING $q due to size ratio $ratio ($srcSize vs. $dstSize)\n";
-                    next;
-                }
-
-                # If there are multiple matching names, include the
-                # ones with the closest version numbers.
-                my $dist = versionDiff $version, $version2;
-                if ($dist > $minDist) {
-                    $minDist = $dist;
-                    @closest = ($q);
-                    $closestVersion = $version2;
-                } elsif ($dist == $minDist) {
-                    push @closest, $q;
-                }
-            }
-        }
-
-        if (scalar(@closest) == 0) {
-            print "    NO BASE: $p\n";
-            next;
-        }
-
-        foreach my $closest (@closest) {
-
-            # Generate a patch between $closest and $p.
-            print STDERR "  $p <- $closest\n";
-
-            # If the patch already exists, skip it.
-            if (containsPatch($srcPatches, $p, $closest) ||
-                containsPatch($dstPatches, $p, $closest))
-            {
-                print "    skipping, already exists\n";
-                next;
-            }
-
-            my $srcNarBz2 = getNarBz2 $narPath, $srcNarFiles, $closest;
-            my $dstNarBz2 = getNarBz2 $narPath, $dstNarFiles, $p;
-
-            if (! -f $srcNarBz2) {
-                warn "patch source archive $srcNarBz2 is missing\n";
-                next;
-            }
-
-            system("@bunzip2@ < $srcNarBz2 > $tmpDir/A") == 0
-                or die "cannot unpack $srcNarBz2";
-
-            if ((stat "$tmpDir/A")[7] >= $maxNarSize) {
-                print "    skipping, source is too large\n";
-                next;
-            }
-        
-            system("@bunzip2@ < $dstNarBz2 > $tmpDir/B") == 0
-                or die "cannot unpack $dstNarBz2";
-
-            if ((stat "$tmpDir/B")[7] >= $maxNarSize) {
-                print "    skipping, destination is too large\n";
-                next;
-            }
-        
-            my $time1 = time();
-            my $res = system("ulimit -t $timeLimit; @libexecdir@/bsdiff $tmpDir/A $tmpDir/B $tmpDir/DIFF");
-            my $time2 = time();
-            if ($res) {
-                warn "binary diff computation aborted after ", $time2 - $time1, " seconds\n";
-                next;
-            }
-
-            my $baseHash = `@bindir@/nix-hash --flat --type $hashAlgo --base32 $tmpDir/A` or die;
-            chomp $baseHash;
-
-            my $narHash = `@bindir@/nix-hash --flat --type $hashAlgo --base32 $tmpDir/B` or die;
-            chomp $narHash;
-
-            my $narDiffHash = `@bindir@/nix-hash --flat --type $hashAlgo --base32 $tmpDir/DIFF` or die;
-            chomp $narDiffHash;
-
-            my $narDiffSize = (stat "$tmpDir/DIFF")[7];
-            my $dstNarBz2Size = (stat $dstNarBz2)[7];
-
-            print "    size $narDiffSize; full size $dstNarBz2Size; ", $time2 - $time1, " seconds\n";
-        
-            if ($narDiffSize >= $dstNarBz2Size) {
-                print "    rejecting; patch bigger than full archive\n";
-                next;
-            }
-    
-            if ($narDiffSize / $dstNarBz2Size >= $maxPatchFraction) {
-                print "    rejecting; patch too large relative to full archive\n";
-                next;
-            }
-    
-            my $finalName = "$narDiffHash.nar-bsdiff";
-
-            if (-e "$patchesPath/$finalName") {
-                print "    not copying, already exists\n";
-            }
-
-            else {
-                system("cp '$tmpDir/DIFF' '$patchesPath/$finalName.tmp'") == 0
-                    or die "cannot copy diff";
-                rename("$patchesPath/$finalName.tmp", "$patchesPath/$finalName")
-                    or die "cannot rename $patchesPath/$finalName.tmp";
-            }
-        
-            # Add the patch to the manifest.
-            addPatch $dstPatches, $p,
-                { url => "$patchesURL/$finalName", hash => "$hashAlgo:$narDiffHash"
-                , size => $narDiffSize, basePath => $closest, baseHash => "$hashAlgo:$baseHash"
-                , narHash => "$hashAlgo:$narHash", patchType => "nar-bsdiff"
-                };
-        }
-    }
-}
-
-
-# Propagate useful patches from $srcPatches to $dstPatches.  A patch
-# is useful if it produces either paths in the $dstNarFiles or paths
-# that can be used as the base for other useful patches.
-sub propagatePatches {
-    my ($srcPatches, $dstNarFiles, $dstPatches) = @_;
-
-    print STDERR "propagating patches...\n";
-
-    my $changed;
-    do {
-        # !!! we repeat this to reach the transitive closure; inefficient
-        $changed = 0;
-
-        print STDERR "loop\n";
-
-        my %dstBasePaths;
-        foreach my $q (keys %{$dstPatches}) {
-            foreach my $patch (@{$$dstPatches{$q}}) {
-                $dstBasePaths{$patch->{basePath}} = 1;
-            }
-        }
-
-        foreach my $p (keys %{$srcPatches}) {
-            my $patchList = $$srcPatches{$p};
-
-            my $include = 0;
-
-            # Is path $p included in the destination?  If so, include
-            # patches that produce it.
-            $include = 1 if defined $$dstNarFiles{$p};
-
-            # Is path $p a path that serves as a base for paths in the
-            # destination?  If so, include patches that produce it.
-            # !!! check baseHash
-            $include = 1 if defined $dstBasePaths{$p};
-
-            if ($include) {
-                foreach my $patch (@{$patchList}) {
-                    $changed = 1 if addPatch $dstPatches, $p, $patch;
-                }
-            }
-        
-        }
-    
-    } while $changed;
-}
-
-
-# Add all new patches in $srcPatches to $dstPatches.
-sub copyPatches {
-    my ($srcPatches, $dstPatches) = @_;
-    foreach my $p (keys %{$srcPatches}) {
-        addPatch $dstPatches, $p, $_ foreach @{$$srcPatches{$p}};
-    }
-}
-
-
-return 1;

scripts/Makefile.am

@@ -1,45 +1,24 @@
 bin_SCRIPTS = nix-collect-garbage \
-  nix-pull nix-push nix-prefetch-url \
-  nix-install-package nix-channel nix-build \
-  nix-copy-closure nix-generate-patches
+ nix-pull nix-push nix-prefetch-url \
+ nix-install-package nix-channel
 
-noinst_SCRIPTS = nix-profile.sh GeneratePatches.pm \
-  find-runtime-roots.pl build-remote.pl nix-reduce-build \
-  copy-from-other-stores.pl nix-http-export.cgi
+noinst_SCRIPTS = nix-profile.sh
 
-nix-pull nix-push: NixManifest.pm NixConfig.pm download-using-manifests.pl
+nix-pull nix-push: readmanifest.pm
 
-install-exec-local: NixManifest.pm GeneratePatches.pm download-using-manifests.pl copy-from-other-stores.pl find-runtime-roots.pl
+install-exec-local: readmanifest.pm
 	$(INSTALL) -d $(DESTDIR)$(sysconfdir)/profile.d
 	$(INSTALL_PROGRAM) nix-profile.sh $(DESTDIR)$(sysconfdir)/profile.d/nix.sh
 	$(INSTALL) -d $(DESTDIR)$(libexecdir)/nix
-	$(INSTALL_DATA) NixManifest.pm $(DESTDIR)$(libexecdir)/nix 
-	$(INSTALL_DATA) NixConfig.pm $(DESTDIR)$(libexecdir)/nix 
-	$(INSTALL_DATA) SSH.pm $(DESTDIR)$(libexecdir)/nix 
-	$(INSTALL_DATA) GeneratePatches.pm $(DESTDIR)$(libexecdir)/nix 
-	$(INSTALL_PROGRAM) find-runtime-roots.pl $(DESTDIR)$(libexecdir)/nix 
-	$(INSTALL_PROGRAM) build-remote.pl $(DESTDIR)$(libexecdir)/nix 
-	$(INSTALL) -d $(DESTDIR)$(libexecdir)/nix/substituters
-	$(INSTALL_PROGRAM) download-using-manifests.pl $(DESTDIR)$(libexecdir)/nix/substituters
-	$(INSTALL_PROGRAM) copy-from-other-stores.pl $(DESTDIR)$(libexecdir)/nix/substituters
+	$(INSTALL_DATA) readmanifest.pm $(DESTDIR)$(libexecdir)/nix 
 	$(INSTALL) -d $(DESTDIR)$(sysconfdir)/nix
+# !!! don't overwrite local modifications
+	$(INSTALL_DATA) prebuilts.conf $(DESTDIR)$(sysconfdir)/nix/prebuilts.conf
 
 include ../substitute.mk
 
 EXTRA_DIST = nix-collect-garbage.in \
-  nix-pull.in nix-push.in nix-profile.sh.in \
-  nix-prefetch-url.in nix-install-package.in \
-  nix-channel.in \
-  NixManifest.pm.in \
-  NixConfig.pm.in \
-  SSH.pm \
-  GeneratePatches.pm.in \
-  nix-build.in \
-  download-using-manifests.pl.in \
-  copy-from-other-stores.pl.in \
-  nix-copy-closure.in \
-  find-runtime-roots.pl.in \
-  build-remote.pl.in \
-  nix-reduce-build.in \
-  nix-http-export.cgi.in \
-  nix-generate-patches.in
+ nix-pull.in nix-push.in nix-profile.sh.in \
+ nix-prefetch-url.in nix-install-package.in \
+ nix-channel.in \
+ prebuilts.conf readmanifest.pm.in

scripts/NixConfig.pm.in

@@ -1,17 +0,0 @@
-use strict;
-
-sub readConfig {
-    my %config;
-    my $config = "@sysconfdir@/nix/nix.conf";
-    return unless -f $config;
-    
-    open CONFIG, "<$config" or die "cannot open `$config'";
-    while (<CONFIG>) {
-        /^\s*([\w|-]+)\s*=\s*(.*)$/ or next;
-        $config{$1} = $2;
-        print "|$1| -> |$2|\n";
-    }
-    close CONFIG;
-}
-
-return 1;

scripts/NixManifest.pm.in

@@ -1,211 +0,0 @@
-use strict;
-
-
-sub addPatch {
-    my ($patches, $storePath, $patch) = @_;
-
-    $$patches{$storePath} = []
-        unless defined $$patches{$storePath};
-
-    my $patchList = $$patches{$storePath};
-
-    my $found = 0;
-    foreach my $patch2 (@{$patchList}) {
-        $found = 1 if
-            $patch2->{url} eq $patch->{url} &&
-            $patch2->{basePath} eq $patch->{basePath};
-    }
-    
-    push @{$patchList}, $patch if !$found;
-
-    return !$found;
-}
-
-
-sub readManifest {
-    my ($manifest, $narFiles, $localPaths, $patches) = @_;
-
-    open MANIFEST, "<$manifest"
-        or die "cannot open `$manifest': $!";
-
-    my $inside = 0;
-    my $type;
-
-    my $manifestVersion = 2;
-
-    my ($storePath, $url, $hash, $size, $basePath, $baseHash, $patchType);
-    my ($narHash, $narSize, $references, $deriver, $hashAlgo, $copyFrom, $system);
-
-    while (<MANIFEST>) {
-        chomp;
-        s/\#.*$//g;
-        next if (/^$/);
-
-        if (!$inside) {
-
-            if (/^\s*(\w*)\s*\{$/) {
-                $type = $1;
-                $type = "narfile" if $type eq "";
-                $inside = 1;
-                undef $storePath;
-                undef $url;
-                undef $hash;
-                undef $size;
-                undef $narHash;
-                undef $narSize;
-                undef $basePath;
-                undef $baseHash;
-                undef $patchType;
-                undef $system;
-                $references = "";
-                $deriver = "";
-                $hashAlgo = "md5";
-	    }
-
-        } else {
-            
-            if (/^\}$/) {
-                $inside = 0;
-
-                if ($type eq "narfile") {
-
-                    $$narFiles{$storePath} = []
-                        unless defined $$narFiles{$storePath};
-
-                    my $narFileList = $$narFiles{$storePath};
-
-                    my $found = 0;
-                    foreach my $narFile (@{$narFileList}) {
-                        $found = 1 if $narFile->{url} eq $url;
-                    }
-                    if (!$found) {
-                        push @{$narFileList},
-                            { url => $url, hash => $hash, size => $size
-                            , narHash => $narHash, narSize => $narSize
-                            , references => $references
-                            , deriver => $deriver, hashAlgo => $hashAlgo
-                            , system => $system
-                            };
-                    }
-                
-                }
-
-                elsif ($type eq "patch") {
-                    addPatch $patches, $storePath,
-                        { url => $url, hash => $hash, size => $size
-                        , basePath => $basePath, baseHash => $baseHash
-                        , narHash => $narHash, narSize => $narSize
-                        , patchType => $patchType, hashAlgo => $hashAlgo
-                        };
-                }
-
-                elsif ($type eq "localPath") {
-
-                    $$localPaths{$storePath} = []
-                        unless defined $$localPaths{$storePath};
-
-                    my $localPathsList = $$localPaths{$storePath};
-
-                    # !!! remove duplicates
-                    
-                    push @{$localPathsList},
-                        { copyFrom => $copyFrom, references => $references
-                        , deriver => ""
-                        };
-                }
-
-            }
-            
-            elsif (/^\s*StorePath:\s*(\/\S+)\s*$/) { $storePath = $1; }
-            elsif (/^\s*CopyFrom:\s*(\/\S+)\s*$/) { $copyFrom = $1; }
-            elsif (/^\s*Hash:\s*(\S+)\s*$/) { $hash = $1; }
-            elsif (/^\s*URL:\s*(\S+)\s*$/) { $url = $1; }
-            elsif (/^\s*Size:\s*(\d+)\s*$/) { $size = $1; }
-            elsif (/^\s*SuccOf:\s*(\/\S+)\s*$/) { } # obsolete
-            elsif (/^\s*BasePath:\s*(\/\S+)\s*$/) { $basePath = $1; }
-            elsif (/^\s*BaseHash:\s*(\S+)\s*$/) { $baseHash = $1; }
-            elsif (/^\s*Type:\s*(\S+)\s*$/) { $patchType = $1; }
-            elsif (/^\s*NarHash:\s*(\S+)\s*$/) { $narHash = $1; }
-            elsif (/^\s*NarSize:\s*(\d+)\s*$/) { $narSize = $1; }
-            elsif (/^\s*References:\s*(.*)\s*$/) { $references = $1; }
-            elsif (/^\s*Deriver:\s*(\S+)\s*$/) { $deriver = $1; }
-            elsif (/^\s*ManifestVersion:\s*(\d+)\s*$/) { $manifestVersion = $1; }
-            elsif (/^\s*System:\s*(\S+)\s*$/) { $system = $1; }
-
-            # Compatibility;
-            elsif (/^\s*NarURL:\s*(\S+)\s*$/) { $url = $1; }
-            elsif (/^\s*MD5:\s*(\S+)\s*$/) { $hash = "md5:$1"; }
-
-        }
-    }
-
-    close MANIFEST;
-
-    return $manifestVersion;
-}
-
-
-sub writeManifest {
-    my ($manifest, $narFiles, $patches, $noCompress) = @_;
-
-    open MANIFEST, ">$manifest.tmp"; # !!! check exclusive
-
-    print MANIFEST "version {\n";
-    print MANIFEST "  ManifestVersion: 3\n";
-    print MANIFEST "}\n";
-
-    foreach my $storePath (sort (keys %{$narFiles})) {
-        my $narFileList = $$narFiles{$storePath};
-        foreach my $narFile (@{$narFileList}) {
-            print MANIFEST "{\n";
-            print MANIFEST "  StorePath: $storePath\n";
-            print MANIFEST "  NarURL: $narFile->{url}\n";
-            print MANIFEST "  Hash: $narFile->{hash}\n" if defined $narFile->{hash};
-            print MANIFEST "  Size: $narFile->{size}\n" if defined $narFile->{size};
-            print MANIFEST "  NarHash: $narFile->{narHash}\n";
-            print MANIFEST "  NarSize: $narFile->{narSize}\n" if $narFile->{narSize};
-            print MANIFEST "  References: $narFile->{references}\n"
-                if defined $narFile->{references} && $narFile->{references} ne "";
-            print MANIFEST "  Deriver: $narFile->{deriver}\n"
-                if defined $narFile->{deriver} && $narFile->{deriver} ne "";
-            print MANIFEST "  System: $narFile->{system}\n" if defined $narFile->{system};
-            print MANIFEST "}\n";
-        }
-    }
-    
-    foreach my $storePath (sort (keys %{$patches})) {
-        my $patchList = $$patches{$storePath};
-        foreach my $patch (@{$patchList}) {
-            print MANIFEST "patch {\n";
-            print MANIFEST "  StorePath: $storePath\n";
-            print MANIFEST "  NarURL: $patch->{url}\n";
-            print MANIFEST "  Hash: $patch->{hash}\n";
-            print MANIFEST "  Size: $patch->{size}\n";
-            print MANIFEST "  NarHash: $patch->{narHash}\n";
-            print MANIFEST "  NarSize: $patch->{narSize}\n" if $patch->{narSize};
-            print MANIFEST "  BasePath: $patch->{basePath}\n";
-            print MANIFEST "  BaseHash: $patch->{baseHash}\n";
-            print MANIFEST "  Type: $patch->{patchType}\n";
-            print MANIFEST "}\n";
-        }
-    }
-    
-    
-    close MANIFEST;
-
-    rename("$manifest.tmp", $manifest)
-        or die "cannot rename $manifest.tmp: $!";
-
-
-    # Create a bzipped manifest.
-    unless (defined $noCompress) {
-	system("@bzip2@ < $manifest > $manifest.bz2.tmp") == 0
-	    or die "cannot compress manifest";
-
-	rename("$manifest.bz2.tmp", "$manifest.bz2")
-	    or die "cannot rename $manifest.bz2.tmp: $!";
-    }
-}
-
-
-return 1;

scripts/SSH.pm

@@ -1,52 +0,0 @@
-use strict;
-use File::Temp qw(tempdir);
-
-our @sshOpts = split ' ', ($ENV{"NIX_SSHOPTS"} or "");
-
-push @sshOpts, "-x";
-
-my $sshStarted = 0;
-my $sshHost;
-
-# Open a master SSH connection to `host', unless there already is a
-# running master connection (as determined by `-O check').
-sub openSSHConnection {
-    my ($host) = @_;
-    die if $sshStarted;
-    $sshHost = $host;
-    return 1 if system("ssh $sshHost @sshOpts -O check 2> /dev/null") == 0;
-
-    my $tmpDir = tempdir("nix-ssh.XXXXXX", CLEANUP => 1, TMPDIR => 1)
-        or die "cannot create a temporary directory";
-    
-    push @sshOpts, "-S", "$tmpDir/control";
-
-    # Start the master.  We can't use the `-f' flag (fork into
-    # background after establishing the connection) because then the
-    # child continues to run if we are killed.  So instead make SSH
-    # print "started" when it has established the connection, and wait
-    # until we see that.
-    open SSHPIPE, "ssh $sshHost @sshOpts -M -N -o LocalCommand='echo started' -o PermitLocalCommand=yes |" or die;
-
-    while (<SSHPIPE>) {
-        chomp;
-        if ($_ eq "started") {
-            $sshStarted = 1;
-            return 1;
-        }
-    }
-
-    return 0;
-}
-
-# Tell the master SSH client to exit.
-sub closeSSHConnection {
-    if ($sshStarted) {
-        system("ssh $sshHost @sshOpts -O exit 2> /dev/null") == 0
-            or warn "unable to stop SSH master: $?";
-    }
-}
-
-END { my $saved = $?; closeSSHConnection; $? = $saved; }
-
-return 1;