* Forgot to tag the 0.10 release.

generating NEWS.txt.

COPYING

@@ -1,221 +1,397 @@
-		    GNU GENERAL PUBLIC LICENSE
-		       Version 2, June 1991
+		  GNU LESSER GENERAL PUBLIC LICENSE
+		       Version 2.1, February 1999
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
-     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  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.]
+
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-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.
+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.
 
 			    NO WARRANTY
 
-  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.
+  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.
 
-  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.
+  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.
 
 		     END OF TERMS AND CONDITIONS
 
-	    How to Apply These Terms to Your New Programs
+           How to Apply These Terms to Your New Libraries
 
-  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.
+  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).
 
-  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.
+  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.
 
-    <one line to give the program's name and a brief idea of what it does.>
+    <one line to give the library's name and a brief idea of what it does.>
     Copyright (C) <year>  <name of author>
 
-    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 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 distributed in the hope that it will be useful,
+    This library 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 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
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
 
+    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 program, if
+school, if any, to sign a "copyright disclaimer" for the library, if
 necessary.  Here is a sample; alter the names:
 
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
 
-  <signature of Ty Coon>, 1 April 1989
+  <signature of Ty Coon>, 1 April 1990
   Ty Coon, President of Vice
 
-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.
+That's all there is to it!
+
+

Makefile.am

@@ -1,6 +1,6 @@
 SUBDIRS = externals src scripts corepkgs doc misc tests
 EXTRA_DIST = substitute.mk nix.spec nix.spec.in bootstrap.sh \
-  svn-revision nix.conf.example
+  svn-revision nix.conf.example NEWS
 
 include ./substitute.mk
 
@@ -14,9 +14,9 @@ relname:
 
 install-data-local: init-state
 	$(INSTALL) -d $(DESTDIR)$(sysconfdir)/nix
-	$(INSTALL_DATA) nix.conf.example $(DESTDIR)$(sysconfdir)/nix
+	$(INSTALL_DATA) $(srcdir)/nix.conf.example $(DESTDIR)$(sysconfdir)/nix
 	if ! test -e $(DESTDIR)$(sysconfdir)/nix/nix.conf; then \
-		$(INSTALL_DATA) nix.conf.example $(DESTDIR)$(sysconfdir)/nix/nix.conf; \
+		$(INSTALL_DATA) $(srcdir)/nix.conf.example $(DESTDIR)$(sysconfdir)/nix/nix.conf; \
 	fi
 
 if INIT_STATE
@@ -36,7 +36,8 @@ init-state:
 	$(INSTALL) $(INIT_FLAGS) $(GROUP_WRITABLE) -d $(DESTDIR)$(localstatedir)/nix/gcroots/channels
 	rm -f $(DESTDIR)$(localstatedir)/nix/gcroots/profiles
 	ln -s $(localstatedir)/nix/profiles $(DESTDIR)$(localstatedir)/nix/gcroots/profiles
-	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(prefix)/store
+	$(INSTALL) $(INIT_FLAGS) -d $(DESTDIR)$(localstatedir)/nix/userpool
+	$(INSTALL) $(INIT_FLAGS) -m 1777 -d $(DESTDIR)$(prefix)/store
 	$(INSTALL) $(INIT_FLAGS) $(GROUP_WRITABLE) -d $(DESTDIR)$(localstatedir)/nix/manifests
 #	$(bindir)/nix-store --init
 else
@@ -45,3 +46,8 @@ endif
 
 svn-revision:
 	svnversion . > svn-revision
+
+all-local: NEWS
+
+NEWS: doc/manual/NEWS.txt
+	cp $(srcdir)/doc/manual/NEWS.txt NEWS

NEWS

@@ -1,261 +0,0 @@
-Version 0.9
-
-* Unpacking of patch sequences is much faster now by not doing
-  redundant unpacking and repacking of intermediate paths.
-
-
-Version 0.8 (April 11, 2005)
-
-NOTE: the hashing scheme in Nix 0.8 changed (as detailed below).  As a
-result, `nix-pull' manifests and channels built for Nix 0.7 and below
-will now work anymore.  However, the Nix expression language has not
-changed, so you can still build from source.  Also, existing user
-environments continue to work.  Nix 0.8 will automatically upgrade the
-database schema of previous installations when it is first run.
-
-If you get the error message
-
-  you have an old-style manifest `/nix/var/nix/manifests/[...]';
-  please delete it
-
-you should delete previously downloaded manifests:
-
-  $ rm /nix/var/nix/manifests/*
-
-If `nix-channel' gives the error message
-
-  manifest `http://catamaran.labs.cs.uu.nl/dist/nix/channels/[channel]/MANIFEST'
-  is too old (i.e., for Nix <= 0.7)
-
-then you should unsubscribe from the offending channel (`nix-channel
---remove URL'; leave out `/MANIFEST'), and subscribe to the same URL,
-with `channels' replaced by `channels-v3' (e.g.,
-http://catamaran.labs.cs.uu.nl/dist/nix/channels-v3/nixpkgs-unstable).
-
-Nix 0.8 has the following improvements:
-
-* The cryptographic hashes used in store paths are now 160 bits long,
-  but encoded in base-32 so that they are still only 32 characters
-  long (e.g., /nix/store/csw87wag8bqlqk7ipllbwypb14xainap-atk-1.9.0).
-  (This is actually a 160 bit truncation of a SHA-256 hash.)
-
-* Big cleanups and simplifications of the basic store semantics.  The
-  notion of "closure store expressions" is gone (and so is the notion
-  of "successors"); the file system references of a store path are now
-  just stored in the database.
-
-  For instance, given any store path, you can query its closure:
-
-    $ nix-store -qR $(which firefox)
-    ... lots of paths ...
-
-  Also, Nix now remembers for each store path the derivation that
-  built it (the "deriver"):
-
-    $ nix-store -qR $(which firefox)
-    /nix/store/4b0jx7vq80l9aqcnkszxhymsf1ffa5jd-firefox-1.0.1.drv
-
-  So to see the build-time dependencies, you can do
-  
-    $ nix-store -qR $(nix-store -qd $(which firefox))
-
-  or, in a nicer format:
-
-    $ nix-store -q --tree $(nix-store -qd $(which firefox))
-
-  File system references are also stored in reverse.  For instance,
-  you can query all paths that directly or indirectly use a certain
-  Glibc:
-
-    $ nix-store -q --referers-closure \
-        /nix/store/8lz9yc6zgmc0vlqmn2ipcpkjlmbi51vv-glibc-2.3.4
-
-* The concept of fixed-output derivations has been formalised.
-  Previously, functions such as `fetchurl' in Nixpkgs used a hack
-  (namely, explicitly specifying a store path hash) to prevent changes
-  to, say, the URL of the file from propagating upwards through the
-  dependency graph, causing rebuilds of everything.  This can now be
-  done cleanly by specifying the `outputHash' and `outputHashAlgo'
-  attributes.  Nix itself checks that the content of the output has
-  the specified hash.  (This is important for maintaining certain
-  invariants necessary for future work on secure shared stores.)
-
-* One-click installation :-)  It is now possible to install any
-  top-level component in Nixpkgs directly, through the web - see,
-  e.g., http://catamaran.labs.cs.uu.nl/dist/nixpkgs-0.8/.  All you
-  have to do is associate `/nix/bin/nix-install-package' with the MIME
-  type `application/nix-package' (or the extension `.nixpkg'), and
-  clicking on a package link will cause it to be installed, with all
-  appropriate dependencies.  If you just want to install some specific
-  application, this is easier than subscribing to a channel.
-
-* `nix-store -r PATHS' now builds all the derivations PATHS in
-  parallel.  Previously it did them sequentially (though exploiting
-  possible parallelism between subderivations).  This is nice for
-  build farms.
-
-* `nix-channel' has new operations `--list' and `--remove'.
-
-* New ways of installing components into user environments:
-
-  - Copy from another user environment:
-
-      $ nix-env -i --from-profile .../other-profile firefox
-
-  - Install a store derivation directly (bypassing the Nix expression
-    language entirely):
-
-      $ nix-env -i /nix/store/z58v41v21xd3...-aterm-2.3.1.drv
-
-    (This is used to implement `nix-install-package', which is
-    therefore immune to evolution in the Nix expression language.)
-
-  - Install an already built store path directly:
-
-      $ nix-env -i /nix/store/hsyj5pbn0d9i...-aterm-2.3.1
-
-  - Install the result of a Nix expression specified as a command-line
-    argument:
-
-      $ nix-env -f .../i686-linux.nix -i -E 'x: x.firefoxWrapper'
-
-    The difference with the normal installation mode is that `-E' does
-    not use the `name' attributes of derivations.  Therefore, this can
-    be used to disambiguate multiple derivations with the same name.
-
-* A hash of the contents of a store path is now stored in the database
-  after a succesful build.  This allows you to check whether store
-  paths have been tampered with: `nix-store --verify --check-contents'.
-    
-* Implemented a concurrent garbage collector.  It is now always safe
-  to run the garbage collector, even if other Nix operations are
-  happening simultaneously.
-
-  However, there can still be GC races if you use `nix-instantiate'
-  and `nix-store -r' directly to build things.  To prevent races, use
-  the `--add-root' flag of those commands.
-
-* The garbage collector now finally deletes paths in the right order
-  (i.e., topologically sorted under the `references' relation), thus
-  making it safe to interrupt the collector without risking a store
-  that violates the closure invariant.
-
-* Likewise, the substitute mechanism now downloads files in the right
-  order, thus preserving the closure invariant at all times.
-
-* The result of `nix-build' is now registered as a root of the garbage
-  collector.  If the `./result' link is deleted, the GC root
-  disappears automatically.
-
-* The behaviour of the garbage collector can be changed globally by
-  setting options in `/nix/etc/nix/nix.conf'.
-
-  - `gc-keep-derivations' specifies whether deriver links should be
-    followed when searching for live paths.
-
-  - `gc-keep-outputs' specifies whether outputs of derivations should
-    be followed when searching for live paths.
-  
-  - `env-keep-derivations' specifies whether user environments should
-    store the paths of derivations when they are added (thus keeping
-    the derivations alive).
-
-* New `nix-env' query flags `--drv-path' and `--out-path'.
-
-* `fetchurl' allows SHA-1 and SHA-256 in addition to MD5.  Just
-  specify the attribute `sha1' or `sha256' instead of `md5'.
-
-* Manual updates.
-
-  
-Version 0.7 (January 12, 2005)
-
-* Binary patching.  When upgrading components using pre-built binaries
-  (through nix-pull / nix-channel), Nix can automatically download and
-  apply binary patches to already installed components instead of full
-  downloads.  Patching is "smart": if there is a *sequence* of patches
-  to an installed component, Nix will use it.  Patches are currently
-  generated automatically between Nixpkgs (pre-)releases.
-
-* Simplifications to the substitute mechanism.
-
-* Nix-pull now stores downloaded manifests in /nix/var/nix/manifests.
-
-* Metadata on files in the Nix store is canonicalised after builds:
-  the last-modified timestamp is set to 0 (00:00:00 1/1/1970), the
-  mode is set to 0444 or 0555 (readable and possibly executable by
-  all; setuid/setgid bits are dropped), and the group is set to the
-  default.  This ensures that the result of a build and an
-  installation through a substitute is the same; and that timestamp
-  dependencies are revealed.
-
-
-Version 0.6 (November 14, 2004)
-
-Major changes include the following:
-
-* Rewrite of the normalisation engine.
-
-  * Multiple builds can now be performed in parallel (option `-j').
-
-  * Distributed builds.  Nix can now call a shell script to forward
-    builds to Nix installations on remote machines, which may or may
-    not be of the same platform type.
-
-  * Option `--fallback' allows recovery from broken substitutes.
-
-  * Option `--keep-going' causes building of other (unaffected)
-    derivations to continue if one failed.
-    
-* Improvements to the garbage collector (i.e., it should actually work
-  now).
-
-* Setuid Nix installations allow a Nix store to be shared among
-  multiple users.
-
-* Substitute registration is much faster now.
-
-* A utility `nix-build' to build a Nix expression and create a symlink
-  to the result int the current directory; useful for testing Nix
-  derivations.
-
-* Manual updates.
-
-* `nix-env' changes:
-
-  * Derivations for other platforms are filtered out (which can be
-    overriden using `--system-filter').
-
-  * `--install' by default now uninstall previous derivations with the
-    same name.
-
-  * `--upgrade' allows upgrading to a specific version.
-
-  * New operation `--delete-generations' to remove profile
-    generations (necessary for effective garbage collection).
-
-  * Nicer output (sorted, columnised).
-
-* More sensible verbosity levels all around (builder output is now
-  shown always, unless `-Q' is given).
-
-* Nix expression language changes:
-
-  * New language construct: `with E1; E2' brings all attributes
-    defined in the attribute set E1 in scope in E2.
-
-  * Added a `map' function.
-
-  * Various new operators (e.g., string concatenation).
-
-* Expression evaluation is much faster.
-
-* An Emacs mode for editing Nix expressions (with syntax highlighting
-  and indentation) has been added.
-
-* Many bug fixes.
-
-
-Version 0.5 and earlier
-
-Please refer to the Subversion commit log messages.

aterm-gc.supp

@@ -0,0 +1,184 @@
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:AT_isValidSymbol
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:AT_isValidSymbol
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:AT_isInsideValidTerm
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:AT_isInsideValidTerm
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:AT_markTerm_young
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:AT_markTerm_young
+   fun:mark_memory_young
+   fun:mark_phase_young
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:AT_isValidSymbol
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:AT_isValidSymbol
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:AT_isInsideValidTerm
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:AT_isInsideValidTerm
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:AT_markTerm
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:AT_markTerm
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:AT_markTerm
+   fun:mark_memory
+   fun:mark_phase
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Cond
+   fun:mark_phase_young
+   fun:AT_collect_minor
+}
+
+{
+   ATerm library conservatively scans for GC roots
+   Memcheck:Value4
+   fun:mark_phase_young
+   fun:AT_collect_minor
+}
+
+{
+   <insert a suppression name here>
+   Memcheck:Cond
+   fun:AT_isValidSymbol
+   fun:mark_phase_young
+   fun:AT_collect_minor
+}
+
+{
+   <insert a suppression name here>
+   Memcheck:Value4
+   fun:AT_isValidSymbol
+   fun:mark_phase_young
+   fun:AT_collect_minor
+}
+
+{
+   <insert a suppression name here>
+   Memcheck:Value4
+   fun:AT_isInsideValidTerm
+   fun:mark_phase_young
+   fun:AT_collect_minor
+}
+
+{
+   <insert a suppression name here>
+   Memcheck:Cond
+   fun:AT_isInsideValidTerm
+   fun:mark_phase_young
+   fun:AT_collect_minor
+}

bootstrap.sh

@@ -1,4 +1,6 @@
 #! /bin/sh -e
+mkdir -p config
+libtoolize --copy
 aclocal
 autoheader
 automake --add-missing --copy

configure.ac

@@ -1,25 +1,28 @@
-AC_INIT(nix, "0.9")
+AC_INIT(nix, 0.10)
 AC_CONFIG_SRCDIR(README)
 AC_CONFIG_AUX_DIR(config)
-AM_INIT_AUTOMAKE([dist-bzip2])
-
+AM_INIT_AUTOMAKE([dist-bzip2 foreign])
+        
 # Change to `1' to produce a `stable' release (i.e., the `preREVISION'
 # suffix is not added).
-STABLE=0
+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${REVISION}"
+        VERSION=${VERSION}pre${REVISION}
     elif REVISION=`cat $srcdir/svn-revision 2> /dev/null`; then
-        VERSION="${VERSION}pre${REVISION}"
+        VERSION=${VERSION}pre${REVISION}
     fi
 fi
 
+AC_DEFINE_UNQUOTED(NIX_VERSION, ["$(echo $VERSION)"], [version])
+
 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 'A-Z ' 'a-z_')
@@ -29,6 +32,9 @@ case $machine_name in
     i*86)
         machine_name=i686
         ;;
+    ppc)
+        machine_name=powerpc
+        ;;
     *)
         if test "$cpu_name" != "unknown"; then
             machine_name=$cpu_name
@@ -37,6 +43,13 @@ case $machine_name in
 esac
 
 sys_name=$(uname -s | tr 'A-Z ' 'a-z_')
+
+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}")
@@ -44,9 +57,32 @@ AC_MSG_RESULT($system)
 AC_SUBST(system)
 AC_DEFINE_UNQUOTED(SYSTEM, ["$system"], [platform identifier (`cpu-os')])
 
+
+# Windows-specific stuff.
+if test "$sys_name" = "cygwin"; then
+    # We cannot delete open files.
+    AC_DEFINE(CANNOT_DELETE_OPEN_FILES, 1, [Whether it is impossible to delete open files.])
+
+    # Shared libraries don't work, currently.
+    AC_DISABLE_SHARED
+    AC_ENABLE_STATIC
+fi
+
+
 AC_PROG_CC
 AC_PROG_CXX
-AC_PROG_RANLIB
+
+
+# We are going to use libtool.
+AC_DISABLE_STATIC
+AC_ENABLE_SHARED
+AC_PROG_LIBTOOL
+
+
+# Use 64-bit file system calls so that we can support files > 2 GiB.
+CFLAGS="-D_FILE_OFFSET_BITS=64 $CFLAGS"
+CXXFLAGS="-D_FILE_OFFSET_BITS=64 $CXXFLAGS"
+
 
 # Check for pubsetbuf.
 AC_MSG_CHECKING([for pubsetbuf])
@@ -59,11 +95,13 @@ static char buf[1024];]],
     AC_MSG_RESULT(no))
 AC_LANG_POP(C++)
 
+
 # Check for <locale>
 AC_LANG_PUSH(C++)
 AC_CHECK_HEADERS([locale])
 AC_LANG_POP(C++)
 
+
 AC_DEFUN([NEED_PROG],
 [
 AC_PATH_PROG($1, $2)
@@ -73,15 +111,17 @@ fi
 ])
 
 NEED_PROG(curl, curl)
-NEED_PROG(bzip2, bzip2)
-NEED_PROG(bunzip2, bunzip2)
 NEED_PROG(shell, sh)
+NEED_PROG(patch, patch)
 AC_PATH_PROG(xmllint, xmllint, false)
 AC_PATH_PROG(xsltproc, xsltproc, false)
+AC_PATH_PROG(jing, jing, false) # needed because xmllint --relaxng seems broken
+AC_PATH_PROG(w3m, w3m, false)
 AC_PATH_PROG(flex, flex, false)
 AC_PATH_PROG(bison, bison, false)
 NEED_PROG(perl, perl)
 NEED_PROG(tar, tar)
+AC_PATH_PROG(dot, dot)
                 
 NEED_PROG(cat, cat)
 AC_ARG_WITH(coreutils-bin, AC_HELP_STRING([--with-coreutils-bin=PATH],
@@ -89,10 +129,10 @@ AC_ARG_WITH(coreutils-bin, AC_HELP_STRING([--with-coreutils-bin=PATH],
   coreutils=$withval, coreutils=$(dirname $cat))
 AC_SUBST(coreutils)
 
-AC_ARG_WITH(docbook-catalog, AC_HELP_STRING([--with-docbook-catalog=PATH],
-  [path of the DocBook XML DTD]),
-  docbookcatalog=$withval, docbookcatalog=/docbook-dtd-missing)
-AC_SUBST(docbookcatalog)
+AC_ARG_WITH(docbook-rng, AC_HELP_STRING([--with-docbook-rng=PATH],
+  [path of the DocBook RelaxNG schema]),
+  docbookrng=$withval, docbookrng=/docbook-rng-missing)
+AC_SUBST(docbookrng)
 
 AC_ARG_WITH(docbook-xsl, AC_HELP_STRING([--with-docbook-xsl=PATH],
   [path of the DocBook XSL stylesheets]),
@@ -140,14 +180,52 @@ AC_SUBST(aterm_lib)
 AC_SUBST(aterm_include)
 AC_SUBST(aterm_bin)
 
+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 "$bzip2")
+if test -z "$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}'
+  # But for testing, we have to use the temporary copy :-(
+  bzip2_bin_test='${top_builddir}/externals/inst-bzip2/bin'
+else
+  bzip2_lib="-L$bzip2/lib -lbz2"
+  bzip2_include="-I$bzip2/include"
+  bzip2_bin="$bzip2/bin"
+  bzip2_bin_test="$bzip2/bin"
+fi   
+AC_SUBST(bzip2_lib)
+AC_SUBST(bzip2_include)
+AC_SUBST(bzip2_bin)
+AC_SUBST(bzip2_bin_test)
+
+
 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_ARG_ENABLE(setuid, AC_HELP_STRING([--enable-setuid],
   [install Nix setuid]),
   setuid_hack=$enableval, setuid_hack=no)
@@ -175,6 +253,13 @@ AC_SUBST(NIX_GROUP)
 AC_DEFINE_UNQUOTED(NIX_GROUP, ["$NIX_GROUP"], [Nix group])
 
                                                                                                             
+# This is needed if ATerm, Berkeley DB 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
@@ -190,8 +275,8 @@ AC_CONFIG_FILES([Makefile
    src/libexpr/Makefile
    src/nix-instantiate/Makefile
    src/nix-env/Makefile
-   src/log2xml/Makefile
-   src/bsdiff-4.2/Makefile
+   src/nix-log2xml/Makefile
+   src/bsdiff-4.3/Makefile
    scripts/Makefile
    corepkgs/Makefile
    corepkgs/nar/Makefile

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) default.nix $(DESTDIR)$(datadir)/nix/corepkgs/buildenv
+	$(INSTALL_DATA) $(srcdir)/default.nix $(DESTDIR)$(datadir)/nix/corepkgs/buildenv
 	$(INSTALL_PROGRAM) builder.pl $(DESTDIR)$(datadir)/nix/corepkgs/buildenv
 
 include ../../substitute.mk

corepkgs/buildenv/builder.pl.in

@@ -10,11 +10,15 @@ my $out = $ENV{"out"};
 mkdir "$out", 0755 || die "error creating $out";
 
 
+my $symlinks = 0;
+
+
 # For each activated package, create symlinks.
 
 sub createLinks {
     my $srcDir = shift;
     my $dstDir = shift;
+    my $ignoreCollisions = shift;
 
     my @srcFiles = glob("$srcDir/*");
 
@@ -22,10 +26,12 @@ sub createLinks {
         my $baseName = $srcFile;
         $baseName =~ s/^.*\///g; # strip directory
         my $dstFile = "$dstDir/$baseName";
-        
+
+        # Urgh, hacky...
 	if ($srcFile =~ /\/propagated-build-inputs$/ ||
             $srcFile =~ /\/nix-support$/ ||
             $srcFile =~ /\/perllocal.pod$/ ||
+            $srcFile =~ /\/info\/dir$/ ||
             $srcFile =~ /\/log$/)
         {
             # Do nothing.
@@ -36,7 +42,7 @@ sub createLinks {
             lstat $dstFile;
             
             if (-d _) {
-                createLinks($srcFile, $dstFile);
+                createLinks($srcFile, $dstFile, $ignoreCollisions);
             }
 
             elsif (-l _) {
@@ -47,62 +53,82 @@ sub createLinks {
                 unlink $dstFile or die "error unlinking `$dstFile': $!";
                 mkdir $dstFile, 0755 || 
                     die "error creating directory `$dstFile': $!";
-                createLinks($target, $dstFile);
-                createLinks($srcFile, $dstFile);
+                createLinks($target, $dstFile, $ignoreCollisions);
+                createLinks($srcFile, $dstFile, $ignoreCollisions);
             }
 
             else {
                 symlink($srcFile, $dstFile) ||
                     die "error creating link `$dstFile': $!";
+                $symlinks++;
             }
         }
 
         elsif (-l $dstFile) {
-            my $target = readlink $dstFile;
-            die "collission between `$srcFile' and `$target'";
+            if (!$ignoreCollisions) {
+                my $target = readlink $dstFile;
+                die "collission between `$srcFile' and `$target'";
+            }
         }
 
         else {
-#            print "linking $dstFile to $srcFile\n";
             symlink($srcFile, $dstFile) ||
                 die "error creating link `$dstFile': $!";
+            $symlinks++;
         }
     }
 }
 
 
 my %done;
+my %postponed;
 
 sub addPkg;
 sub addPkg {
     my $pkgDir = shift;
+    my $ignoreCollisions = shift;
 
     return if (defined $done{$pkgDir});
     $done{$pkgDir} = 1;
 
-    print "adding $pkgDir\n";
-    createLinks("$pkgDir", "$out");
+#    print "symlinking $pkgDir\n";
+    createLinks("$pkgDir", "$out", $ignoreCollisions);
 
-    my $propagatedFN = "$pkgDir/nix-support/propagated-build-inputs";
+    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) {
-            addPkg $p;
+            $postponed{$p} = 1 unless defined $done{$p};
         }
     }
-        
 }
 
 
+# Symlink to the packages that have been installed explicitly by the user.
 my @args = split ' ', $ENV{"derivations"};
 
-while (scalar @args > 0) {
-    my $drvPath = shift @args;
-    addPkg($drvPath);
+foreach my $pkgDir (sort @args) {
+    addPkg($pkgDir, 0);
 }
 
 
+# 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.
+while (scalar(keys %postponed) > 0) {
+    my @pkgDirs = keys %postponed;
+    %postponed = ();
+    foreach my $pkgDir (sort @pkgDirs) {
+        addPkg($pkgDir, 1);
+    }
+}
+
+
+print STDERR "created $symlinks symlinks in user environment\n";
+
+
 symlink($ENV{"manifest"}, "$out/manifest") or die "cannot create manifest";

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) unpack.nix $(DESTDIR)$(datadir)/nix/corepkgs/channels
+	$(INSTALL_DATA) $(srcdir)/unpack.nix $(DESTDIR)$(datadir)/nix/corepkgs/channels
 	$(INSTALL_PROGRAM) unpack.sh $(DESTDIR)$(datadir)/nix/corepkgs/channels
 
 include ../../substitute.mk

corepkgs/nar/Makefile.am

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

corepkgs/nar/nar.nix

@@ -1,5 +1,7 @@
-{system, path, hashAlgo}: derivation {
+{system, storePath, hashAlgo}: 
+
+derivation {
   name = "nar";
   builder = ./nar.sh;
-  inherit system path hashAlgo;
+  inherit system storePath hashAlgo;
 }

corepkgs/nar/nar.sh.in

@@ -1,9 +1,9 @@
 #! @shell@ -e
 
-echo "packing $path into $out..."
+echo "packing $storePath into $out..."
 @coreutils@/mkdir $out
 dst=$out/tmp.nar.bz2
-@bindir@/nix-store --dump "$path" > tmp
+@bindir@/nix-store --dump "$storePath" > tmp
 
 @bzip2@ < tmp > $dst
 

doc/manual/Makefile.am

@@ -1,16 +1,21 @@
-ENV = SGML_CATALOG_FILES=$(docbookcatalog)
-
-XMLLINT = $(ENV) $(xmllint) $(xmlflags) --catalogs
-XSLTPROC = $(ENV) $(xsltproc) $(xmlflags) --catalogs \
+XMLLINT = $(xmllint) $(xmlflags)
+XSLTPROC = $(xsltproc) $(xmlflags) \
  --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 toc.section.depth 3 \
+ --param admon.style \'\' \
+ --param callout.graphics.extension \'.gif\'
+
+# 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 \
  nix-collect-garbage.1 nix-push.1 nix-pull.1 \
- nix-prefetch-url.1 nix-channel.1
+ nix-prefetch-url.1 nix-channel.1 \
+ nix-pack-closure.1 nix-unpack-closure.1 \
+ nix-install-package.1 nix-hash.1
 
 FIGURES = figures/user-environments.png
 
@@ -20,11 +25,16 @@ MANUAL_SRCS = manual.xml introduction.xml installation.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 \
+ conf-file.xml release-notes.xml \
  style.css images
 
 manual.is-valid: $(MANUAL_SRCS) version.txt
-	$(XMLLINT) --xinclude $< | $(XMLLINT) --noout --nonet --valid -
+#	$(XMLLINT) --xinclude $< | $(XMLLINT) --noout --nonet --relaxng $(docbookrng)/docbook.rng -
+	if test "$(jing)" != "false"; then \
+		$(XMLLINT) --xinclude $< | $(jing) $(docbookrng)/docbook.rng /dev/stdin; \
+	else \
+		echo "Not validating."; \
+	fi
 	touch $@
 
 version.txt:
@@ -37,7 +47,25 @@ manual.html: $(MANUAL_SRCS) manual.is-valid images
 	$(XSLTPROC) --nonet --xinclude --output manual.html \
 	  $(docbookxsl)/html/docbook.xsl manual.xml
 
-all-local: manual.html
+
+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
 
 install-data-local: manual.html
 	$(INSTALL) -d $(DESTDIR)$(datadir)/nix/manual
@@ -49,12 +77,12 @@ install-data-local: manual.html
 
 images:
 	mkdir images
-	cp $(docbookxsl)/images/*.png images
+#	cp $(docbookxsl)/images/*.gif images
 	mkdir images/callouts
-	cp $(docbookxsl)/images/callouts/*.png images/callouts
-	chmod +w -R images
+	cp $(docbookxsl)/images/callouts/*.gif images/callouts
+	chmod -R +w images
 
-KEEP = manual.html manual.is-valid version.txt $(MANS)
+KEEP = manual.html manual.is-valid version.txt $(MANS) NEWS.html NEWS.txt
 
 EXTRA_DIST = $(MANUAL_SRCS) $(FIGURES) $(KEEP)
 

doc/manual/bugs.xml

@@ -1,4 +1,8 @@
-<appendix><title>Bugs / To-Do</title>
+<appendix xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
+
+<title>Bugs / To-Do</title>
+
 
 <itemizedlist>
 
@@ -15,11 +19,12 @@ implemented; generations form a linear sequence.</para></listitem>
 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>
+language should be extended with features from the <link
+xlink:href='http://www.cs.uu.nl/~eelco/maak/'>Maak build
+manager</link>.  Another interesting idea is to write a
+<command>make</command> implementation that uses Nix as a back-end to
+support <link
+xlink:href='http://www.research.att.com/~bs/bs_faq.html#legacy'>legacy</link>
 build files.</para></listitem>
 
 <listitem><para>For security, <command>nix-push</command> manifests

doc/manual/build-farm.xml

@@ -1,4 +1,9 @@
-<chapter id='chap-build-farm'><title>Setting up a Build Farm</title>
+<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
@@ -50,13 +55,13 @@ build farm, since:
 
 <para>TODO</para>
 
-<para>The sources of the Nix build farm are at <ulink
-url='https://svn.cs.uu.nl:12443/repos/trace/release/trunk' />.</para>
+<para>The sources of the Nix build farm are at <link
+xlink:href='https://svn.cs.uu.nl:12443/repos/trace/release/trunk'/>.</para>
 
 </section>
 
 
-<section id='sec-distributed-builds'><title>Setting up distributed builds</title>
+<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
@@ -70,7 +75,7 @@ the documentation of the <link
 linkend="envar-build-hook"><envar>NIX_BUILD_HOOK</envar>
 variable</link>.</para>
 
-<example id='ex-remote-systems'><title>Remote machine configuration:
+<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
@@ -79,8 +84,8 @@ nix@scratchy.labs.cs.uu.nl  i686-linux      /home/nix/.ssh/id_scratchy_auto
 </example>
 
 <para>An example build hook can be found in the Nix build farm
-sources: <ulink
-url='https://svn.cs.uu.nl:12443/repos/trace/release/trunk/common/distributed/build-remote.pl'
+sources: <link
+xlink:href='https://svn.cs.uu.nl:12443/repos/trace/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

doc/manual/conf-file.xml

@@ -1,4 +1,9 @@
-<sect1 id="sec-conf-file"><title>Nix configuration file</title>
+<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>.
@@ -7,7 +12,7 @@ This file is a list of <literal><replaceable>name</replaceable> =
 Comments start with a <literal>#</literal> character.  An example
 configuration file is shown in <xref linkend="ex-nix-conf" />.</para>
 
-<example id='ex-nix-conf'><title>Nix configuration file</title>
+<example xml:id='ex-nix-conf'><title>Nix configuration file</title>
 
 <programlisting>
 gc-keep-outputs = true       # Nice for developers
@@ -20,7 +25,8 @@ env-keep-derivations = false
 
 <variablelist>
 
-  <varlistentry id="conf-gc-keep-outputs"><term><literal>gc-keep-outputs</literal></term>
+  
+  <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
@@ -35,8 +41,9 @@ env-keep-derivations = false
     this option to <literal>true</literal>.</para></listitem>
 
   </varlistentry>
+  
 
-  <varlistentry id="conf-gc-keep-derivations"><term><literal>gc-keep-derivations</literal></term>
+  <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
@@ -52,6 +59,28 @@ env-keep-derivations = false
 
   </varlistentry>
 
+  
+  <varlistentry xml:id="conf-gc-reserved-space"><term><literal>gc-reserved-space</literal></term>
+
+    <listitem><para>This option specifies how much space should be
+    reserved in normal use so that the garbage collector can run
+    succesfully.  Since the garbage collector must perform Berkeley DB
+    transactions, it needs some disk space for itself.  However, when
+    the disk is full, this space is not available, so the collector
+    would not be able to run precisely when it is most needed.</para>
+
+    <para>For this reason, when Nix is run, it allocates a file
+    <filename>/nix/var/nix/db/reserved</filename> of the size
+    specified by this option.  When the garbage collector is run, this
+    file is deleted before the Berkeley DB environment is opened.
+    This should give it enough room to proceed.</para>
+
+    <para>The default is <literal>1048576</literal> (1
+    MiB).</para></listitem>
+
+  </varlistentry>
+
+  
   <varlistentry><term><literal>env-keep-derivations</literal></term>
 
     <listitem><para>If <literal>false</literal> (default), derivations
@@ -75,8 +104,44 @@ env-keep-derivations = false
 
   </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><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>
+  
+    
 </variablelist>
 
 </para>
 
-</sect1>
+
+</section>

doc/manual/env-common.xml

@@ -1,4 +1,9 @@
-<sect1 id="sec-common-env"><title>Common environment variables</title>
+<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>
 
@@ -118,7 +123,7 @@ $ mount -o bind /mnt/otherdisk/nix /nix</screen>
 </varlistentry>
 
 
-<varlistentry id="envar-build-hook"><term><envar>NIX_BUILD_HOOK</envar></term>
+<varlistentry xml:id="envar-build-hook"><term><envar>NIX_BUILD_HOOK</envar></term>
 
   <listitem>
 
@@ -271,4 +276,5 @@ $ mount -o bind /mnt/otherdisk/nix /nix</screen>
 
 </variablelist>
 
-</sect1>
+
+</section>

doc/manual/glossary.xml

@@ -1,9 +1,13 @@
-<appendix><title>Glossary</title>
+<appendix xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
+
+<title>Glossary</title>
+
 
 <glosslist>
 
 
-<glossentry id="gloss-derivation"><glossterm>derivation</glossterm>
+<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
@@ -46,7 +50,7 @@
 </glossentry>
 
 
-<glossentry id="gloss-substitute"><glossterm>substitute</glossterm>
+<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
@@ -79,7 +83,7 @@
 </glossentry>
 
 
-<glossentry id="gloss-reference"><glossterm>reference</glossterm>
+<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
@@ -92,7 +96,7 @@
 </glossentry>
 
 
-<glossentry id="gloss-closure"><glossterm>closure</glossterm>
+<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
@@ -108,14 +112,14 @@
 </glossentry>
 
 
-<glossentry id="gloss-output-path"><glossterm>output path</glossterm>
+<glossentry xml:id="gloss-output-path"><glossterm>output path</glossterm>
 
   <glossdef><para>A store path produced by a derivation.</para></glossdef>
 
 </glossentry>
 
 
-<glossentry id="gloss-deriver"><glossterm>deriver</glossterm>
+<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
@@ -124,7 +128,7 @@
 </glossentry>
 
 
-<glossentry id="gloss-validity"><glossterm>validity</glossterm>
+<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
@@ -134,7 +138,7 @@
 </glossentry>
 
 
-<glossentry id="gloss-user-env"><glossterm>user environment</glossterm>
+<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
@@ -147,7 +151,7 @@
 </glossentry>
 
 
-<glossentry id="gloss-profile"><glossterm>profile</glossterm>
+<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.,

doc/manual/installation.xml

@@ -1,36 +1,43 @@
-<chapter id='chap-installation'><title>Installation</title>
+<?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">
+
+<title>Installation</title>
 
 
-<sect1><title>Obtaining Nix</title>
+<section><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 Red Hat, SuSE, and Fedore Core are
-also available.</para>
+<para>The easiest way to obtain Nix is to download a <link
+xlink:href="http://www.cs.uu.nl/groups/ST/Trace/Nix">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 <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>
+from its <link
+xlink:href="https://svn.cs.uu.nl:12443/repos/trace/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.cs.uu.nl:12443/repos/trace/nix/trunk nix</screen>
 
-<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>
+<para>Likewise, specific releases can be obtained from the <link
+xlink:href="https://svn.cs.uu.nl:12443/repos/trace/nix/tags">tags
+directory</link> of the repository.  If you don't have Subversion, you
+can also download an automatically generated <link
+xlink:href="https://svn.cs.uu.nl:12443/dist/trace/">compressed
+tar-file</link> of the head revision of the trunk.</para>
 
-</sect1>
+</section>
 
 
-<sect1><title>Prerequisites</title>
+<section><title>Prerequisites</title>
 
-<para>The following prerequisites only apply when you build from
-source.  Binary releases (e.g., RPMs) have no prerequisites.</para>
+<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>
@@ -39,22 +46,23 @@ and higher should work.</para>
 <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
+<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 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
+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 2.5.31, 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>
 
@@ -67,12 +75,12 @@ these packages.  Alternatively, if you already have them installed,
 you can use <command>configure</command>'s <option>--with-bdb</option>
 and <option>--with-aterm</option> options to point to their respective
 locations.  Note that Berkeley DB <emphasis>must</emphasis> be version
-4.2; other versions may not have compatible database formats.</para>
+4.4; other versions may not have compatible database formats.</para>
 
-</sect1>
+</section>
 
 
-<sect1><title>Building Nix from source</title>
+<section><title>Building Nix from source</title>
 
 <para>After unpacking or checking out the Nix sources, issue the
 following commands:
@@ -97,30 +105,30 @@ $ autoreconf -i</screen>
 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>
+<warning><para>It is best <emphasis>not</emphasis> to change the
+installation prefix from its default, since doing so makes it
+impossible to use pre-built binaries from the standard Nixpkgs
+channels.</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>
+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>
 
-</sect1>
+</section>
 
 
-<sect1><title>Installing from RPMs</title>
+<section><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>RPM packages of Nix can be downloaded from <uri
+xlink:href="http://www.cs.uu.nl/groups/ST/Trace/Nix">http://www.cs.uu.nl/groups/ST/Trace/Nix</uri>.
+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>
@@ -137,28 +145,41 @@ auxiliary data:</para>
 $ rm -rf /nix/store
 $ rm -rf /nix/var</screen>
 
-</sect1>
+</section>
 
 
-<sect1><title>Permissions</title>
+<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://nix.cs.uu.nl/dist/nix/channels-v3/nix-stable" /> ,
+or the latest unstable version by subscribing to the channel<link
+xlink:href="http://nix.cs.uu.nl/dist/nix/channels-v3/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://nix.cs.uu.nl/dist/nix/" />.</para>
+
+</section>
+
+
+<section><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>
+directories are owned by <systemitem class="username">root</systemitem>.</para>
 
-<sect2><title>Setuid installation</title>
+<section><title>Setuid installation</title>
 
 <para>As a somewhat <emphasis>ad hoc</emphasis> hack, you can also
 install the Nix binaries <quote>setuid</quote> so that a Nix store can
 be shared among several users.  To do this, configure Nix with the
 <emphasis>--enable-setuid</emphasis> option.  Nix will be installed as
 owned by a user and group specified by the
-<option>--with-nix-user=<parameter>user</parameter></option> and
-<option>--with-nix-group=<parameter>group</parameter></option>
+<option>--with-nix-user=</option><parameter>user</parameter> and
+<option>--with-nix-group=</option><parameter>group</parameter>
 options.  E.g.,
 
 <screen>
@@ -184,12 +205,12 @@ on systems that have the <function>setresuid()</function> system call
 (such as Linux and FreeBSD), so on those systems the binaries are
 simply owned by the Nix user.</para></warning>
 
-</sect2>
+</section>
 
-</sect1>
+</section>
 
 
-<sect1><title>Using Nix</title>
+<section><title>Using Nix</title>
 
 <para>To use Nix, some environment variables should be set.  In
 particular, <envar>PATH</envar> should contain the directories
@@ -206,7 +227,7 @@ in your <filename>~/.bashrc</filename> (or similar), like this:</para>
 <screen>
 source <replaceable>prefix</replaceable>/etc/profile.d/nix.sh</screen>
 
-</sect1>
+</section>
 
 
 </chapter>

doc/manual/introduction.xml

@@ -1,9 +1,7 @@
-<chapter><title>Introduction</title>
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink">
 
-<!--
-<epigraph><para><quote>The number of Nix installations in the world
-has grown to 5, with more expected.</quote></para></epigraph>
--->
+<title>Introduction</title>
 
 <para>Nix is a system for the deployment of software.  Software
 deployment is concerned with the creation, distribution, and
@@ -130,21 +128,23 @@ collection.  It also discusses some advanced topics, such as setting
 up a Nix-based build farm, and doing service deployment using
 Nix.</para>
 
-<note><para>Some background information on Nix can be found in three
-papers.  The ICSE 2004 paper <ulink
-url='http://www.cs.uu.nl/~eelco/pubs/immdsd-icse2004-final.pdf'><citetitle>Imposing
-a Memory Management Discipline on Software
-Deployment</citetitle></ulink> discusses the hashing mechanism used to
-ensure reliable dependency identification and non-interference between
-different versions and variants of packages.  The LISA 2004 paper
-<ulink
-url='http://www.cs.uu.nl/~eelco/pubs/nspfssd-lisa2004-final.pdf'><citetitle>Nix:
-A Safe and Policy-Free System for Software
-Deployment</citetitle></ulink> gives a more general discussion of Nix
-from a system-administration perspective.  The CBSE 2005 paper <ulink
-url='http://www.cs.uu.nl/~eelco/pubs/eupfcdm-cbse2005-final.pdf'><citetitle>Efficient
+<note><para>Some background information on Nix can be found in a
+number of papers.  The ICSE 2004 paper <citetitle
+xlink:href='http://www.cs.uu.nl/~eelco/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.cs.uu.nl/~eelco/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.cs.uu.nl/~eelco/pubs/eupfcdm-cbse2005-final.pdf'>Efficient
 Upgrading in a Purely Functional Component Deployment Model
-</citetitle></ulink> is about transparent patch deployment in
-Nix.</para></note>
+</citetitle> is about transparent patch deployment in Nix.  Finally,
+the SCM-12 paper <citetitle
+xlink:href='http://www.cs.uu.nl/~eelco/pubs/servicecm-scm12-final.pdf'>
+Service Configuration Management</citetitle> shows how services (e.g.,
+web servers) can be deployed and managed through Nix.</para></note>
 
 </chapter>

doc/manual/manual.xml

@@ -1,83 +1,114 @@
-<?xml version="1.0"?>
-<!DOCTYPE book
-    PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
-    "http://www.docbook.org/xml/4.3/docbook-xml-4.3.zip"
-[
-]>
+<book xmlns="http://docbook.org/ns/docbook"
+      xmlns:xi="http://www.w3.org/2001/XInclude">
 
-<book>
-  <title>Nix User's Guide</title>
+  <info>
+
+    <title>Nix User's Guide</title>
+
+    <subtitle>Draft (Version <xi:include href="version.txt"
+    parse="text" />)</subtitle>
 
-  <subtitle>Draft (Version <xi:include
-  xmlns:xi="http://www.w3.org/2001/XInclude"
-  href="version.txt" parse="text" />)</subtitle>
-  
-  <bookinfo>
     <author>
-      <firstname>Eelco</firstname>
-      <surname>Dolstra</surname>
+      <personname>
+        <firstname>Eelco</firstname>
+        <surname>Dolstra</surname>
+      </personname>
     </author>
+
     <copyright>
       <year>2004</year>
       <year>2005</year>
+      <year>2006</year>
       <holder>Eelco Dolstra</holder>
     </copyright>
-  </bookinfo>
+    
+  </info>
+
   
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="introduction.xml" />
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="quick-start.xml" />
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="installation.xml" />
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="package-management.xml" />
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="writing-nix-expressions.xml" />
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="build-farm.xml" />
+  <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" />
+
 
   <appendix>
     <title>Command Reference</title>
-    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common.xml" />
-    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="env-common.xml" />
-    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="conf-file.xml" />
-    <sect1 id="sec-nix-env">
-      <title>nix-env</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-env.xml" />
-    </sect1>
-    <sect1 id="sec-nix-build">
-      <title>nix-build</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-build.xml" />
-    </sect1>
-    <sect1>
-      <title>nix-store</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-store.xml" />
-    </sect1>
-    <sect1 id="sec-nix-instantiate">
-      <title>nix-instantiate</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-instantiate.xml" />
-    </sect1>
-    <sect1>
-      <title>nix-collect-garbage</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-collect-garbage.xml" />
-    </sect1>
-    <sect1 id="sec-nix-channel">
-      <title>nix-channel</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-channel.xml" />
-    </sect1>
-    <sect1>
-      <title>nix-push</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-push.xml" />
-    </sect1>
-    <sect1>
-      <title>nix-pull</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-pull.xml" />
-    </sect1>
-    <sect1>
-      <title>nix-prefetch-url</title>
-      <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="nix-prefetch-url.xml" />
-    </sect1>
+    <xi:include href="opt-common.xml" />
+    <xi:include href="env-common.xml" />
+    <xi:include href="conf-file.xml" />
+    
+    <section>
+      <title>Main commands</title>
+      <section xml:id="sec-nix-env">
+        <title>nix-env</title>
+        <xi:include href="nix-env.xml" />
+      </section>
+      <section xml:id="sec-nix-instantiate">
+        <title>nix-instantiate</title>
+        <xi:include href="nix-instantiate.xml" />
+      </section>
+      <section>
+        <title>nix-store</title>
+        <xi:include href="nix-store.xml" />
+      </section>
+    </section>
+    
+    <section>
+      <title>Utilities</title>
+      <section xml:id="sec-nix-build">
+        <title>nix-build</title>
+        <xi:include href="nix-build.xml" />
+      </section>
+      <section xml:id="sec-nix-channel">
+        <title>nix-channel</title>
+        <xi:include href="nix-channel.xml" />
+      </section>
+      <section>
+        <title>nix-collect-garbage</title>
+        <xi:include href="nix-collect-garbage.xml" />
+      </section>
+      <section xml:id="sec-nix-hash">
+        <title>nix-hash</title>
+        <xi:include href="nix-hash.xml" />
+      </section>
+      <section xml:id="sec-nix-install-package">
+        <title>nix-install-package</title>
+        <xi:include href="nix-install-package.xml" />
+      </section>
+      <section>
+        <title>nix-pack-closure</title>
+        <xi:include href="nix-pack-closure.xml" />
+      </section>
+      <section>
+        <title>nix-prefetch-url</title>
+        <xi:include href="nix-prefetch-url.xml" />
+      </section>
+      <section>
+        <title>nix-pull</title>
+        <xi:include href="nix-pull.xml" />
+      </section>
+      <section xml:id="sec-nix-push">
+        <title>nix-push</title>
+        <xi:include href="nix-push.xml" />
+      </section>
+      <section>
+        <title>nix-unpack-closure</title>
+        <xi:include href="nix-unpack-closure.xml" />
+      </section>
+    </section>
+    
   </appendix>
 
-  <!--  &nix-lang-ref; -->
-
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="troubleshooting.xml" />
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="bugs.xml" />
-  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="glossary.xml" />
+  <xi:include href="troubleshooting.xml" />
+  <xi:include href="bugs.xml" />
+  <xi:include href="glossary.xml" />
 
+  <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

@@ -1,5 +1,6 @@
-<refentry>
-  
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
+
 <refnamediv>
   <refname>nix-build</refname>
   <refpurpose>build a Nix expression</refpurpose>
@@ -8,8 +9,25 @@
 <refsynopsisdiv>
   <cmdsynopsis>
     <command>nix-build</command>
+    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xpointer(/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-drv-link</option></arg>
-    <arg><option>--no-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>
@@ -25,14 +43,17 @@ to multiple derivations, multiple sequentially numbered symlinks are
 created (<filename>result</filename>, <filename>result-2</filename>,
 and so on).</para>
 
-<note><para><command>nix-build</command> is essentially a wrapper
-around <link
+<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></note>
+--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
@@ -44,6 +65,12 @@ or renamed.  So don’t rename the symlink.</para></warning>
 
 <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>
@@ -57,7 +84,16 @@ or renamed.  So don’t rename the symlink.</para></warning>
     
   </varlistentry>
 
-  <varlistentry><term><option>--no-link</option></term>
+  <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
@@ -66,9 +102,35 @@ or renamed.  So don’t rename the symlink.</para></warning>
 
   </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

@@ -1,4 +1,5 @@
-<refentry>
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
   
 <refnamediv>
   <refname>nix-channel</refname>

doc/manual/nix-collect-garbage.xml

@@ -1,4 +1,5 @@
-<refentry>
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
   
 <refnamediv>
   <refname>nix-collect-garbage</refname>
@@ -8,6 +9,8 @@
 <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>
@@ -19,10 +22,28 @@
 
 <refsection><title>Description</title>
 
-<para>The command <command>nix-collect-garbage</command> is an
-obsolete wrapper around <link
-linkend="rsec-nix-store-gc"><command>nix-store
---gc</command></link>.</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><title>Example</title>
+
+<para>To delete from the Nix store everything that is not used by the
+current generations of each profile, do
+
+<screen>
+$ nix-collect-garbage -d</screen>
+
+</para>
 
 </refsection>
 

doc/manual/nix-env.xml

@@ -1,4 +1,5 @@
-<refentry>
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
   
 <refnamediv>
   <refname>nix-env</refname>
@@ -9,6 +10,14 @@
   <cmdsynopsis>
     <command>nix-env</command>
     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xpointer(/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>
       <group choice='req'>
         <arg choice='plain'><option>--file</option></arg>
@@ -23,7 +32,6 @@
       </group>
       <replaceable>path</replaceable>
     </arg>
-    <arg><option>--preserve-installed</option></arg>
     <arg>
       <arg choice='plain'><option>--system-filter</option></arg>
       <replaceable>system</replaceable>
@@ -101,21 +109,13 @@ linkend="sec-common-options" />.</para>
     <option>--rollback</option> operations, this flag will cause
     <command>nix-env</command> to print what
     <emphasis>would</emphasis> be done if this flag had not been
-    specified, without actually doing it.</para></listitem>
-    
-  </varlistentry>
-      
-  <varlistentry><term><option>--preserve-installed</option></term>
-  
-    <listitem><para>By default, when you install a derivation with the
-    <option>--install</option> operation, it will replace previously
-    installed versions with the same derivation name (regardless of
-    the version number).  This option causes those previously
-    installed versions to be kept in the new generation of the
-    profile.  Note that this will generally cause conflicts in the
-    creation of the user environment (since multiple versions of a
-    package typically contain the same programs).</para></listitem>
-    
+    specified, without actually doing it.</para>
+
+    <para><option>--dry-run</option> also prints out which paths will
+    be <link linkend="gloss-substitute">substituted</link> (i.e.,
+    downloaded) and which paths will be built from source (because no
+    substitute is available).</para></listitem>
+
   </varlistentry>
       
   <varlistentry><term><option>--system-filter</option> <replaceable>system</replaceable></term>
@@ -172,7 +172,7 @@ linkend="sec-common-options" />.</para>
 
 <!--######################################################################-->
 
-<refsection id="rsec-nix-env-install"><title>Operation <option>--install</option></title>
+<refsection xml:id="rsec-nix-env-install"><title>Operation <option>--install</option></title>
 
 <refsection><title>Synopsis</title>
 
@@ -208,7 +208,24 @@ number of possible ways:
   installed.  Currently installed derivations with a name equal to the
   name of a derivation being added are removed unless the option
   <option>--preserve-installed</option> is
-  specified.</para></listitem>
+  specified.</para>
+
+  <para>If there are multiple derivations matching a name in
+  <replaceable>args</replaceable> that have the same name (e.g.,
+  <literal>gcc-3.3.6</literal> and <literal>gcc-4.1.1</literal>), then
+  only the highest version will be installed.  You can force the
+  installation of multiple derivations with the same name by being
+  specific about the versions.  For instance, <literal>nix-env -i
+  gcc-3.3.6 gcc-4.1.1</literal> will install both version of GCC (and
+  will probably cause a user environment conflict!).</para></listitem>
+
+  <listitem><para>If <link
+  linkend='opt-attr'><option>--attr</option></link>
+  (<option>-A</option>) is specified, the arguments are
+  <emphasis>attribute paths</emphasis> that select attributes from the
+  top-level Nix expression.  This is faster than using derivation
+  names and unambiguous.  To find out the attribute paths of available
+  packages, use <literal>nix-env -qaA '*'</literal>.</para></listitem>
 
   <listitem><para>If <option>--from-profile</option>
   <replaceable>path</replaceable> is given,
@@ -264,7 +281,7 @@ number of possible ways:
 </refsection>
             
 
-<refsection><title>Examples</title>
+<refsection xml:id='refsec-nix-env-install-examples'><title>Examples</title>
 
 <para>To install a specific version of <command>gcc</command> from the
 active Nix expression:
@@ -285,6 +302,14 @@ installing `gcc-3.3.2'</screen>
 
 </para>
 
+<para>To install using a specific attribute:
+
+<screen>
+$ nix-env -i -A gcc40mips
+$ nix-env -i -A xorg.xorgserver</screen>
+
+</para>
+
 <para>To install all derivations in the Nix expression <filename>foo.nix</filename>:
 
 <screen>
@@ -327,6 +352,25 @@ selecting the <literal>subversionWithJava</literal> attribute from the
 attribute set returned by calling the function defined in
 <filename>./foo.nix</filename>.</para>
 
+<para>A dry-run tells you which paths will be downloaded or built from
+source:
+
+<screen>
+$ nix-env -f pkgs/top-level/all-packages.nix -i f-spot --dry-run
+(dry run; not doing anything)
+installing `f-spot-0.0.10'
+the following derivations will be built:
+  /nix/store/0g63jv9aagwbgci4nnzs2dkxqz84kdja-libgnomeprintui-2.12.1.tar.bz2.drv
+  /nix/store/0gfarvxq6sannsdw8a1ir40j1ys2mqb4-ORBit2-2.14.2.tar.bz2.drv
+  /nix/store/0i9gs5zc04668qiy60ga2rc16abkj7g8-sqlite-2.8.17.drv
+  <replaceable>...</replaceable>
+the following paths will be substituted:
+  /nix/store/8zbipvm4gp9jfqh9nnk1n3bary1a37gs-perl-XML-Parser-2.34
+  /nix/store/b8a2bg7gnyvvvjjibp4axg9x1hzkw36c-mono-1.1.4
+  <replaceable>...</replaceable></screen>
+  
+</para>
+
 </refsection>
     
 </refsection>
@@ -348,6 +392,7 @@ attribute set returned by calling the function defined in
   <group choice='opt'>
     <arg choice='plain'><option>--lt</option></arg>
     <arg choice='plain'><option>--leq</option></arg>
+    <arg choice='plain'><option>--eq</option></arg>
     <arg choice='plain'><option>--always</option></arg>
   </group>
   <arg choice='plain' rep='repeat'><replaceable>args</replaceable></arg>
@@ -396,6 +441,17 @@ installed.</para>
     
   </varlistentry>
 
+  <varlistentry><term><option>--eq</option></term>
+  
+    <listitem><para><emphasis>Only</emphasis> “upgrade” to derivations
+    that have the same version.  This may not seem very useful, but it
+    actually is, e.g., when there is a new release of Nixpkgs and you
+    want to replace installed applications with the same versions
+    built against newer dependencies (to reduce the number of
+    dependencies floating around on your system).</para></listitem>
+    
+  </varlistentry>
+
   <varlistentry><term><option>--always</option></term>
   
     <listitem><para>In addition to upgrading to newer versions, also
@@ -528,17 +584,37 @@ $ nix-env -e '*' <lineannotation>(remove everything)</lineannotation></screen>
     <arg choice='plain'><option>--query</option></arg>
     <arg choice='plain'><option>-q</option></arg>
   </group>
+  <arg><option>--xml</option></arg>
   <group choice='opt'>
     <arg choice='plain'><option>--installed</option></arg>
     <arg choice='plain'><option>--available</option></arg>
     <arg choice='plain'><option>-a</option></arg>
   </group>
-  <group choice='req'>
-    <arg choice='plain'><option>--name</option></arg>
-    <arg choice='plain'><option>--expr</option></arg>
-    <arg choice='plain'><option>--status</option></arg>
-    <arg choice='plain'><option>-s</option></arg>
-  </group>
+  <sbr />
+  <arg>
+    <group choice='req'>
+      <arg choice='plain'><option>--status</option></arg>
+      <arg choice='plain'><option>-s</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>--no-name</option></arg>
+  <arg>
+    <group choice='req'>
+      <arg choice='plain'><option>--compare-versions</option></arg>
+      <arg choice='plain'><option>-c</option></arg>
+    </group>
+  </arg>
+  <arg><option>--system</option></arg>
+  <arg><option>--drv-path</option></arg>
+  <arg><option>--out-path</option></arg>
+  <arg><option>--description</option></arg>
+  <arg choice='plain' rep='repeat'><replaceable>names</replaceable></arg>
 </cmdsynopsis>
 
 </refsection>
@@ -550,7 +626,10 @@ $ nix-env -e '*' <lineannotation>(remove everything)</lineannotation></screen>
 paths that are installed in the current generation of the active
 profile (<option>--installed</option>), or the derivations that are
 available for installation in the active Nix expression
-(<option>--available</option>).</para>
+(<option>--available</option>).  It only prints information about
+derivations whose symbolic name matches one of
+<replaceable>names</replaceable>.  The wildcard <literal>*</literal>
+shows all derivations.</para>
 
 <para>The derivations are sorted by their <literal>name</literal>
 attributes.</para>
@@ -599,6 +678,18 @@ user environment elements, etc. -->
 
 <variablelist>
 
+  <varlistentry><term><option>--xml</option></term>
+
+    <listitem><para>Print the result in an XML representation suitable
+    for automatic processing by other tools.  The root element is
+    called <literal>items</literal>, which contains a
+    <literal>item</literal> element for each available or installed
+    derivation.  The fields discussed below are all stored in
+    attributes of the <literal>item</literal>
+    elements.</para></listitem>
+
+  </varlistentry>
+
   <varlistentry><term><option>--status</option></term>
     <term><option>-s</option></term>
   
@@ -618,6 +709,17 @@ user environment elements, etc. -->
     
   </varlistentry>
 
+  <varlistentry><term><option>--attr</option></term>
+    <term><option>-a</option></term>
+
+    <listitem><para>Print the <emphasis>attribute path</emphasis> of
+    the derivation, which can be used to unambiguously select it using
+    the <link linkend="opt-attr"><option>--attr</option> option</link>
+    available in commands that install derivations like
+    <literal>nix-env --install</literal>.</para></listitem>
+
+  </varlistentry>
+  
   <varlistentry><term><option>--no-name</option></term>
   
     <listitem><para>Suppress printing of the <literal>name</literal>
@@ -625,6 +727,51 @@ user environment elements, etc. -->
     
   </varlistentry>
 
+  <varlistentry><term><option>--compare-versions</option> /
+  <option>-c</option></term>
+  
+    <listitem><para>Compare installed versions to available versions,
+    or vice versa (if <option>--available</option> is given).  This is
+    useful for quickly seeing whether upgrades for installed
+    components are available in a Nix expression.  A column is added
+    with the following meaning:
+
+    <variablelist>
+
+      <varlistentry><term><literal>&lt;</literal> <replaceable>version</replaceable></term>
+
+        <listitem><para>A newer version of the component is available
+        or installed.</para></listitem>
+
+      </varlistentry>
+      
+      <varlistentry><term><literal>=</literal> <replaceable>version</replaceable></term>
+
+        <listitem><para>At most the same version of the component is
+        available or installed.</para></listitem>
+
+      </varlistentry>
+      
+      <varlistentry><term><literal>></literal> <replaceable>version</replaceable></term>
+
+        <listitem><para>Only older versions of the component are
+        available or installed.</para></listitem>
+
+      </varlistentry>
+      
+      <varlistentry><term><literal>- ?</literal></term>
+
+        <listitem><para>No version of the component is available or
+        installed.</para></listitem>
+
+      </varlistentry>
+
+    </variablelist>
+
+    </para></listitem>
+    
+  </varlistentry>
+
   <varlistentry><term><option>--system</option></term>
   
     <listitem><para>Print the <literal>system</literal> attribute of
@@ -646,6 +793,15 @@ user environment elements, etc. -->
     
   </varlistentry>
 
+  <varlistentry><term><option>--description</option></term>
+  
+    <listitem><para>Print a short (one-line) description of the
+    derivation, if available.  The description is taken from the
+    <literal>meta.description</literal> attribute of the
+    derivation.</para></listitem>
+    
+  </varlistentry>
+
 </variablelist>
 
 </refsection>
@@ -654,28 +810,47 @@ user environment elements, etc. -->
 <refsection><title>Examples</title>
 
 <screen>
-$ nix-env -q <lineannotation>(show installed derivations)</lineannotation>
-MozillaFirebird-0.7
+$ nix-env -q '*' <lineannotation>(show installed derivations)</lineannotation>
 bison-1.875c
 docbook-xml-4.2
-...
-
-$ nix-env -qa <lineannotation>(show available derivations)</lineannotation>
-GConf-2.4.0.1
-MPlayer-1.0pre3
-MozillaFirebird-0.7
+firefox-1.0.4
+MPlayer-1.0pre7
 ORBit2-2.8.3
 ...
 
-$ nix-env -qas <lineannotation>(show status of available derivations)</lineannotation>
--P- GConf-2.4.0.1 <lineannotation>(not installed but present)</lineannotation>
---S MPlayer-1.0pre3 <lineannotation>(not present, but there is a substitute for fast installation)</lineannotation>
---S MozillaFirebird-0.7 <lineannotation>(i.e., this is not the installed Firebird, even though the version is the same!)</lineannotation>
-IP- bison-1.875c <lineannotation>(installed and by definition present)</lineannotation>
+$ nix-env -qa '*' <lineannotation>(show available derivations)</lineannotation>
+firefox-1.0.7
+GConf-2.4.0.1
+MPlayer-1.0pre7
+ORBit2-2.8.3
 ...
 
-$ nix-env -f ./foo.nix -qa <lineannotation>(show available derivations in the Nix expression <filename>foo.nix</filename>)</lineannotation>
-foo-1.2.3</screen>
+$ nix-env -qas '*' <lineannotation>(show status of available derivations)</lineannotation>
+-P- firefox-1.0.7   <lineannotation>(not installed but present)</lineannotation>
+--S GConf-2.4.0.1   <lineannotation>(not present, but there is a substitute for fast installation)</lineannotation>
+--S MPlayer-1.0pre3 <lineannotation>(i.e., this is not the installed MPlayer, even though the version is the same!)</lineannotation>
+IP- ORBit2-2.8.3    <lineannotation>(installed and by definition present)</lineannotation>
+...
+
+<lineannotation>(show available derivations in the Nix expression <!-- !!! <filename>-->foo.nix<!-- </filename> -->)</lineannotation>
+$ nix-env -f ./foo.nix -qa '*' 
+foo-1.2.3
+
+$ nix-env -qc '*' <lineannotation>(compare installed versions to what’s available)</lineannotation>
+<replaceable>...</replaceable>
+acrobat-reader-7.0 - ?      <lineannotation>(package is not available at all)</lineannotation>
+autoconf-2.59      = 2.59   <lineannotation>(same version)</lineannotation>
+firefox-1.0.4      &lt; 1.0.7  <lineannotation>(a more recent version is available)</lineannotation>
+<replaceable>...</replaceable>
+
+<lineannotation>(show info about a specific package, in XML)</lineannotation>
+$ nix-env -qa --xml --description firefox 
+<![CDATA[<?xml version='1.0' encoding='utf-8'?>
+<items>
+  <item attrPath="0.0.firefoxWrapper"
+    description="Mozilla Firefox - the browser, reloaded (with various plugins)"
+    name="firefox-1.5.0.7" system="i686-linux" />
+</items>]]></screen>
 
 </refsection>
 

doc/manual/nix-hash.xml

@@ -0,0 +1,154 @@
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
+  
+<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

@@ -0,0 +1,189 @@
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
+  
+<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

@@ -1,4 +1,5 @@
-<refentry>
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
   
 <refnamediv>
   <refname>nix-instantiate</refname>
@@ -9,12 +10,26 @@
   <cmdsynopsis>
     <command>nix-instantiate</command>
     <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xpointer(/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>
-    <group choice='opt'>
-      <arg choice='plain'><option>--parse-only</option></arg>
-      <arg choice='plain'><option>--eval-only</option></arg>
-    </group>
+    <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>
@@ -30,6 +45,10 @@ 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>
 
+<para>If <replaceable>files</replaceable> is the character
+<literal>-</literal>, then a Nix expression will be read from standard
+input.</para>
+
 <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).
@@ -72,6 +91,31 @@ common options.</para>
     
   </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>
@@ -79,6 +123,9 @@ common options.</para>
 
 <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
@@ -91,6 +138,54 @@ $ ls -l /nix/store/qhqk4n8ci095g3sdp93x7rgwyh9rdvgk-perl-BerkeleyDB-0.26
 dr-xr-xr-x    2 eelco    users        4096 1970-01-01 01:00 lib
 ...</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>
 
 

doc/manual/nix-pack-closure.xml

@@ -0,0 +1,64 @@
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
+
+<refnamediv>
+  <refname>nix-pack-closure</refname>
+  <refpurpose>pack the closure of a store path into a single file that
+  can be unpacked with
+  <command>nix-unpack-closure</command></refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+  <cmdsynopsis>
+    <command>nix-pack-closure</command>
+    <arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg>
+  </cmdsynopsis>
+</refsynopsisdiv>
+
+
+<refsection><title>Description</title>
+
+<para>The command <command>nix-pack-closure</command> packs the
+contents of the store paths <replaceable>paths</replaceable> and
+<emphasis>all their dependencies</emphasis> into a single file, which
+is written to standard output.  (That is, it
+<emphasis>serialises</emphasis> <replaceable>paths</replaceable>.)
+The output can then be unpacked into the Nix store of another machine
+using <command>nix-unpack-closure</command>.</para>
+
+<para>Together, <command>nix-pack-closure</command> and
+<command>nix-unpack-closure</command> provide a quick and easy way to
+deploy a package to a different machine.  However, as the output of
+<command>nix-pack-closure</command> tends to be rather large (since it
+contains all dependencies), it’s not very efficient.
+<command>nix-push</command> and <command>nix-pull</command> are more
+efficient, but are also a bit more cumbersome to use.</para>
+
+</refsection>
+
+
+<refsection><title>Examples</title>
+
+<para>To copy some instance of Subversion with all its dependencies to
+another machine:
+
+<screen>
+$ nix-pack-closure /nix/store/hj232g1r...-subversion-1.3.0 > svn.closure
+
+<lineannotation>Copy <!-- !!! <filename> -->svn.closure to the remote machine, then on the remote machine do:</lineannotation>
+$ nix-unpack-closure &lt; svn.closure</screen>
+
+</para>
+
+<para>Copy the program <command>azureus</command> with all its
+dependencies to the machine <literal>scratchy</literal>:
+
+<screen>
+$ nix-pack-closure $(which azureus) | ssh scratchy nix-unpack-closure</screen>
+    
+</para>
+
+</refsection>
+
+
+</refentry>

doc/manual/nix-pull.xml

@@ -1,43 +1,41 @@
-<refentry>
-  <refnamediv>
-    <refname>nix-pull</refname>
-    <refpurpose>pull substitutes from a network cache</refpurpose>
-  </refnamediv>
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
 
-  <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>
 
-  <refsection>
-    <title>Examples</title>
+<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>
 
-    <screen>
-$ nix-pull http://catamaran.labs.cs.uu.nl/dist/nix/nixpkgs-0.5pre753/MANIFEST</screen>
 
-  </refsection>
-    
 </refentry>

doc/manual/nix-push.xml

@@ -1,4 +1,5 @@
-<refentry>
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
 
 <refnamediv>
   <refname>nix-push</refname>
@@ -62,14 +63,15 @@ machines using the <command>nix-pull</command> command.</para>
   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>/<varname>x</varname></literal>,
+  <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>/<varname>x</varname></literal>.
+  <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>
+  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
@@ -80,7 +82,9 @@ machines using the <command>nix-pull</command> command.</para>
 
 </para>
 
-<para>TODO: <option>--copy</option></para>
+<!--
+<para>TODO:  <option>- -copy</option></para>
+-->
             
 </refsection>
 

doc/manual/nix-store.xml

@@ -1,4 +1,5 @@
-<refentry>
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
 
 <refnamediv>
   <refname>nix-store</refname>
@@ -43,7 +44,7 @@ linkend="sec-common-options" /> for a list of common options.</para>
 
 <variablelist>
 
-  <varlistentry id="opt-add-root"><term><option>--add-root</option> <replaceable>path</replaceable></term>
+  <varlistentry xml:id="opt-add-root"><term><option>--add-root</option> <replaceable>path</replaceable></term>
 
     <listitem><para>Causes the result of a realisation
     (<option>--realise</option> and <option>--force-realise</option>)
@@ -108,8 +109,7 @@ lrwxrwxrwx    1 ... 2005-03-13 21:10 /home/eelco/bla/result -> /nix/store/1r1134
 
 <!--######################################################################-->
 
-<refsection id='rsec-nix-store-realise'><title>Operation
-<option>--realise</option></title>
+<refsection xml:id='rsec-nix-store-realise'><title>Operation <option>--realise</option></title>
 
 <refsection><title>Synopsis</title>
 
@@ -183,7 +183,7 @@ linkend="sec-nix-build"><command>nix-build</command></link> does.</para>
 
 <!--######################################################################-->
 
-<refsection id='rsec-nix-store-gc'><title>Operation <option>--gc</option></title>
+<refsection xml:id='rsec-nix-store-gc'><title>Operation <option>--gc</option></title>
 
 <refsection><title>Synopsis</title>
 
@@ -256,6 +256,11 @@ and <link
 linkend="conf-gc-keep-derivations"><literal>gc-keep-derivations</literal></link>
 variables in the Nix configuration file.</para>
 
+<para>With <option>--delete</option>, the collector prints the total
+number of freed bytes when it finishes (or when it is interrupted).
+With <option>--print-dead</option>, it prints the number of bytes that
+would be freed.</para>
+
 </refsection>
 
 
@@ -264,7 +269,10 @@ variables in the Nix configuration file.</para>
 <para>To delete all unreachable paths, just do:
     
 <screen>
-$ nix-store --gc</screen>
+$ nix-store --gc
+deleting `/nix/store/kq82idx6g0nyzsp2s14gfsc38npai7lf-cairo-1.0.4.tar.gz.drv'
+<replaceable>...</replaceable>
+8825586 bytes freed (8.42 MiB)</screen>
 
 </para>
 
@@ -277,7 +285,52 @@ $ nix-store --gc</screen>
   
 <!--######################################################################-->
 
-<refsection><title>Operation <option>--query</option></title>
+<refsection><title>Operation <option>--delete</option></title>
+
+<refsection><title>Synopsis</title>
+
+<cmdsynopsis>
+  <command>nix-store</command>
+  <arg choice='plain'><option>--gc</option></arg>
+  <arg><option>--ignore-liveness</option></arg>
+  <arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg>
+</cmdsynopsis>
+
+</refsection>
+
+<refsection><title>Description</title>
+
+<para>The operation <option>--delete</option> deletes the store paths
+<replaceable>paths</replaceable> from the Nix store, but only if it is
+safe to do so; that is, when the path is not reachable from a root of
+the garbage collector.  This means that you can only delete paths that
+would also be deleted by <literal>nix-store --gc</literal>.  Thus,
+<literal>--delete</literal> is a more targeted version of
+<literal>--gc</literal>.</para>
+
+<para>With the option <option>--ignore-liveness</option>, reachability
+from the roots is ignored.  However, the path still won’t be deleted
+if there are other paths in the store that refer to it (i.e., depend
+on it).</para>
+
+</refsection>
+
+<refsection><title>Example</title>
+
+<screen>
+$ nix-store --delete /nix/store/zq0h41l75vlb4z45kzgjjmsjxvcv1qk7-mesa-6.4
+0 bytes freed (0.00 MiB)
+error: cannot delete path `/nix/store/zq0h41l75vlb4z45kzgjjmsjxvcv1qk7-mesa-6.4' since it is still alive</screen>
+
+</refsection>
+
+</refsection>
+
+
+
+<!--######################################################################-->
+
+<refsection xml:id='refsec-nix-store-query'><title>Operation <option>--query</option></title>
 
 <refsection><title>Synopsis</title>
 
@@ -292,8 +345,8 @@ $ nix-store --gc</screen>
     <arg choice='plain'><option>--requisites</option></arg>
     <arg choice='plain'><option>-R</option></arg>
     <arg choice='plain'><option>--references</option></arg>
-    <arg choice='plain'><option>--referers</option></arg>
-    <arg choice='plain'><option>--referers-closure</option></arg>
+    <arg choice='plain'><option>--referrers</option></arg>
+    <arg choice='plain'><option>--referrers-closure</option></arg>
     <arg choice='plain'><option>--deriver</option></arg>
     <arg choice='plain'><option>--deriver</option></arg>
     <arg choice='plain'><option>--graph</option></arg>
@@ -353,7 +406,7 @@ query is applied to the target of the symlink.</para>
 </refsection>
     
 
-<refsection id='nixref-queries'><title>Queries</title>
+<refsection xml:id='nixref-queries'><title>Queries</title>
             
 <variablelist>
 
@@ -411,21 +464,21 @@ query is applied to the target of the symlink.</para>
 
   </varlistentry>
   
-  <varlistentry><term><option>--referers</option></term>
+  <varlistentry><term><option>--referrers</option></term>
   
-    <listitem><para>Prints the set of <emphasis>referers</emphasis> of
+    <listitem><para>Prints the set of <emphasis>referrers</emphasis> of
     the store paths <replaceable>paths</replaceable>, that is, the
     store paths currently existing in the Nix store that refer to one
     of <replaceable>paths</replaceable>.  Note that contrary to the
-    references, the set of referers is not constant; it can change as
+    references, the set of referrers is not constant; it can change as
     store paths are added or removed.</para></listitem>
 
   </varlistentry>
   
-  <varlistentry><term><option>--referers-closure</option></term>
+  <varlistentry><term><option>--referrers-closure</option></term>
   
     <listitem><para>Prints the closure of the set of store paths
-    <replaceable>paths</replaceable> under the referers relation; that
+    <replaceable>paths</replaceable> under the referrers relation; that
     is, all store paths that directly or indirectly refer to one of
     <replaceable>paths</replaceable>.  These are all the path currently
     in the Nix store that are dependent on
@@ -448,11 +501,11 @@ query is applied to the target of the symlink.</para>
   
     <listitem><para>Prints the references graph of the store paths
     <replaceable>paths</replaceable> in the format of the
-    <command>dot</command> tool of AT&amp;T's <ulink
-    url="http://www.graphviz.org/">Graphviz package</ulink>.  This can
-    be used to visualise dependency graphs.  To obtain a build-time
-    dependency graph, apply this to a store derivation.  To obtain a
-    runtime dependency graph, apply it to an output
+    <command>dot</command> tool of AT&amp;T's <link
+    xlink:href="http://www.graphviz.org/">Graphviz package</link>.
+    This can be used to visualise dependency graphs.  To obtain a
+    build-time dependency graph, apply this to a store derivation.  To
+    obtain a runtime dependency graph, apply it to an output
     path.</para></listitem>
 
   </varlistentry>
@@ -536,7 +589,7 @@ $ nix-store -q --tree $(nix-store -qd $(which svn))
 <command>svn</command>:
 
 <screen>
-$ nix-store -q --referers $(nix-store -q --binding openssl $(nix-store -qd $(which svn)))
+$ nix-store -q --referrers $(nix-store -q --binding openssl $(nix-store -qd $(which svn)))
 /nix/store/23ny9l9wixx21632y2wi4p585qhva1q8-sylpheed-1.0.0
 /nix/store/5mbglq5ldqld8sj57273aljwkfvj22mc-subversion-1.1.4
 /nix/store/dpmvp969yhdqs7lm2r1a3gng7pyq6vy4-subversion-1.1.3
@@ -548,7 +601,7 @@ $ nix-store -q --referers $(nix-store -q --binding openssl $(nix-store -qd $(whi
 (C library) used by <command>svn</command>:
 
 <screen>
-$ nix-store -q --referers-closure $(ldd $(which svn) | grep /libc.so | awk '{print $3}')
+$ nix-store -q --referrers-closure $(ldd $(which svn) | grep /libc.so | awk '{print $3}')
 /nix/store/034a6h4vpz9kds5r6kzb9lhh81mscw43-libgnomeprintui-2.8.2
 /nix/store/15l3yi0d45prm7a82pcrknxdh6nzmxza-gawk-3.1.4
 <replaceable>...</replaceable></screen>
@@ -575,7 +628,7 @@ $ gv graph.ps</screen>
 <!--######################################################################-->
 
 <!--
-<refsection id="rsec-nix-store-reg-val"><title>Operation <option>-XXX-register-validity</option></title>
+<refsection xml:id="rsec-nix-store-reg-val"><title>Operation <option>-XXX-register-validity</option></title>
 
 <refsection><title>Synopsis</title>
 
@@ -669,8 +722,83 @@ in Nix itself.</para>
 
 </refsection>
             
+
 </refsection>
 
 
+<!--######################################################################-->
+
+<refsection xml:id='refsec-nix-store-dump'><title>Operation <option>--dump</option></title>
+
+<refsection>
+  <title>Synopsis</title>
+  <cmdsynopsis>
+    <command>nix-store</command>
+    <arg choice='plain'><option>--dump</option></arg>
+    <arg choice='plain'><replaceable>path</replaceable></arg>
+  </cmdsynopsis>
+</refsection>
+
+<refsection><title>Description</title>
+            
+<para>The operation <option>--dump</option> produces a NAR (Nix
+ARchive) file containing the contents of the file system tree rooted
+at <replaceable>path</replaceable>.  The archive is written to
+standard output.</para>
+
+<para>A NAR archive is like a TAR or Zip archive, but it contains only
+the information that Nix considers important.  For instance,
+timestamps are elided because all files in the Nix store have their
+timestamp set to 0 anyway.  Likewise, all permissions are left out
+except for the execute bit, because all files in the Nix store have
+644 or 755 permission.</para>
+
+<para>Also, a NAR archive is <emphasis>canonical</emphasis>, meaning
+that “equal” paths always produce the same NAR archive.  For instance,
+directory entries are always sorted so that the actual on-disk order
+doesn’t influence the result.  This means that the cryptographic hash
+of a NAR dump of a path is usable as a fingerprint of the contents of
+the path.  Indeed, the hashes of store paths stored in Nix’s database
+(see <link linkend="refsec-nix-store-query"><literal>nix-store -q
+--hash</literal></link>) are SHA-256 hashes of the NAR dump of each
+store path.</para>
+
+<para>NAR archives support filenames of unlimited length and 64-bit
+file sizes.  They can contain regular files, directories, and symbolic
+links, but not other types of files (such as device nodes).</para>
+
+<para>A Nix archive can be unpacked using <literal>nix-store
+--restore</literal>.</para>
+
+</refsection>
+            
+
+</refsection>
+
+
+<!--######################################################################-->
+
+<refsection><title>Operation <option>--restore</option></title>
+
+<refsection>
+  <title>Synopsis</title>
+  <cmdsynopsis>
+    <command>nix-store</command>
+    <arg choice='plain'><option>--restore</option></arg>
+    <arg choice='plain'><replaceable>path</replaceable></arg>
+  </cmdsynopsis>
+</refsection>
+
+<refsection><title>Description</title>
+            
+<para>The operation <option>--restore</option> unpacks a NAR archive
+to <replaceable>path</replaceable>, which must not already exist.  The
+archive is read from standard input.</para>
+
+</refsection>
+            
+
+</refsection>
+
 
 </refentry>

doc/manual/nix-unpack-closure.xml

@@ -0,0 +1,28 @@
+<refentry xmlns="http://docbook.org/ns/docbook"
+          xmlns:xlink="http://www.w3.org/1999/xlink">
+
+<refnamediv>
+  <refname>nix-unpack-closure</refname>
+  <refpurpose>unpack the closure of a store path created by <command>nix-pack-closure</command> into the Nix store</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+  <cmdsynopsis>
+    <command>nix-unpack-closure</command>
+  </cmdsynopsis>
+</refsynopsisdiv>
+
+
+<refsection><title>Description</title>
+
+<para>The command <command>nix-unpack-closure</command> unpacks the
+closure of a set of store paths created by
+<command>nix-pack-closure</command> into the local Nix store.  The
+closure is a single file read from standard input.  See the
+description of <command>nix-pack-closure</command> for details and
+examples.</para>
+
+</refsection>
+
+
+</refentry>

doc/manual/opt-common-syn.xml

@@ -20,5 +20,6 @@
 <arg><option>--fallback</option></arg>
 <arg><option>--readonly-mode</option></arg>
 <arg><option>--log-type</option> <replaceable>type</replaceable></arg>
+<sbr />
 
 </nop>

doc/manual/opt-common.xml

@@ -1,4 +1,7 @@
-<sect1 id="sec-common-options"><title>Common options</title>
+<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>
 
@@ -86,12 +89,16 @@
 </varlistentry>
 
 
-<varlistentry id="opt-max-jobs"><term><option>--max-jobs</option></term>
+<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 1.  A
-  higher value is useful on SMP systems or to exploit I/O latency.</para></listitem>
+  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>
 
@@ -155,7 +162,7 @@
 </varlistentry>
 
 
-<varlistentry id="opt-log-type"><term><option>--log-type</option>
+<varlistentry xml:id="opt-log-type"><term><option>--log-type</option>
 <replaceable>type</replaceable></term>
 
   <listitem>
@@ -187,9 +194,9 @@
     <varlistentry><term><literal>escapes</literal></term>
 
       <listitem><para>Indicate nesting using escape codes that can be
-      interpreted by the <command>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
+      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>
 
@@ -210,7 +217,73 @@
 </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 ? __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>__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>
+
+
+<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>
+
+
 </variablelist>
 
 
-</sect1>
+</section>

doc/manual/package-management.xml

@@ -1,4 +1,9 @@
-<chapter id='chap-package-management'><title>Package Management</title>
+<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 components.  This is
@@ -7,7 +12,7 @@ who want to <emphasis>create</emphasis> components should consult
 <xref linkend='chap-writing-nix-expressions' />.</para>
 
 
-<sect1><title>Basic package management</title>
+<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
@@ -32,14 +37,14 @@ components 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 <ulink
-url='http://catamaran.labs.cs.uu.nl/dist/nix' />.</para>
+the latest version from <link
+xlink:href='http://nix.cs.uu.nl/dist/nix' />.</para>
 
 <para>Assuming that you have downloaded and unpacked a release of Nix
 Packages, you can view the set of available components in the release:
 
 <screen>
-$ nix-env -qaf nixpkgs-<replaceable>version</replaceable>
+$ nix-env -qaf nixpkgs-<replaceable>version</replaceable> '*'
 ant-blackdown-1.4.2
 aterm-2.2
 bash-3.0
@@ -50,14 +55,30 @@ bzip2-1.0.2
 ...</screen>
 
 where <literal>nixpkgs-<replaceable>version</replaceable></literal> is
-where you’ve unpacked the release.</para>
+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 components, i.e., whether they are installed into the user
 environment and/or present in the system:
 
 <screen>
-$ nix-env -qasf nixpkgs-<replaceable>version</replaceable>
+$ nix-env -qasf nixpkgs-<replaceable>version</replaceable> '*'
 ...
 -PS bash-3.0
 --S binutils-2.15
@@ -83,9 +104,9 @@ components contained in them.  This is done using <literal>nix-env
 $ nix-env -f nixpkgs-<replaceable>version</replaceable> -i subversion</screen>
 
 will install the component called <literal>subversion</literal> (which
-is, of course, the <ulink
-url='http://subversion.tigris.org/'>Subversion version management
-system</ulink>).</para>
+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 —
@@ -96,18 +117,17 @@ 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
-<ulink
-url='http://catamaran.labs.cs.uu.nl/dist/nix/nixpkgs-0.6pre1554/' />,
-then you should do:
+that you’re using.  For instance, if you obtained a release from <link
+xlink:href='http://nix.cs.uu.nl/dist/nix/nixpkgs-0.6pre1554/' />, then
+you should do:
 
 <screen>
-$ nix-pull http://catamaran.labs.cs.uu.nl/dist/nix/nixpkgs-0.6pre1554/MANIFEST</screen>
+$ nix-pull http://nix.cs.uu.nl/dist/nix/nixpkgs-0.6pre1554/MANIFEST</screen>
 
 If you then issue the installation command, it should start
 downloading binaries from <systemitem
-class='fqdomainname'>catamaran.labs.cs.uu.nl</systemitem>, instead of
-building them from source.  This might still take a while since all
+class='fqdomainname'>nix.cs.uu.nl</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>
 
@@ -170,13 +190,13 @@ since <literal>nix-channel --update</literal> calls <literal>nix-env
 from the channel, replacing whatever default you had
 set.</para></footnote></para>
 
-</sect1>
+</section>
 
 
-<sect1 id="sec-profiles"><title>Profiles</title>
+<section xml:id="sec-profiles"><title>Profiles</title>
 
 <para>Profiles and user environments are Nix’s mechanism for
-implementing the ability to allow differens users to have different
+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, components are stored in unique locations in the
@@ -196,7 +216,7 @@ 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 id='fig-user-environments'><title>User environments</title>
+<figure xml:id='fig-user-environments'><title>User environments</title>
   <mediaobject>
     <imageobject>
       <imagedata fileref='figures/user-environments.png' format='PNG' />
@@ -325,10 +345,10 @@ $ 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>
 
-</sect1>
+</section>
 
 
-<sect1 id='sec-garbage-collection'><title>Garbage collection</title>
+<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
@@ -378,8 +398,21 @@ $ 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
 
-<sect2 id="ssec-gc-roots"><title>Garbage collector roots</title>
+<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
@@ -401,12 +434,12 @@ 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>
 
-</sect2>
+</section>
 
-</sect1>
+</section>
 
 
-<sect1 id="sec-channels"><title>Channels</title>
+<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
@@ -425,7 +458,7 @@ URL.</para>
 <command>nix-channel --add</command>, e.g.,
 
 <screen>
-$ nix-channel --add http://catamaran.labs.cs.uu.nl/dist/nix/channels/nixpkgs-unstable</screen>
+$ nix-channel --add http://nix.cs.uu.nl/dist/nix/channels-v3/nixpkgs-unstable</screen>
 
 subscribes you to a channel that always contains that latest version
 of the Nix Packages collection.  (Instead of
@@ -456,7 +489,44 @@ $ nix-env -u '*'</screen>
 to upgrade all components in your profile to the latest versions
 available in the subscribed channels.</para>
 
-</sect1>
+</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://nix.cs.uu.nl/dist/nix/nixpkgs-unstable-latest/">Nix
+Packages collection</link> or from our <link
+xlink:href='http://nix.cs.uu.nl/dist/'>release server</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://nix.cs.uu.nl/dist/nix/nixpkgs-unstable-latest/" />
+— or to any older release of Nix Packages — and click on any link for
+the individual packages for your platform (say, <link
+xlink:href='http://nix.cs.uu.nl/dist/nix/nixpkgs-0.10pre6622/pkgs/subversion-1.4.0-i686-linux.nixpkg'><literal>subversion-1.4.0</literal>
+for <literal>i686-linux</literal></link>).  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>
 
 
 </chapter>

doc/manual/quick-start.xml

@@ -1,4 +1,8 @@
-<chapter><title>Quick Start</title>
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink">
+
+<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
@@ -6,8 +10,8 @@ to the following chapters.</para>
 
 <orderedlist>
 
-<listitem><para>Download a source tarball or RPM from <ulink
-url='http://www.cs.uu.nl/groups/ST/Trace/Nix'/>.  Build source
+<listitem><para>Download a source tarball or RPM from <link
+xlink:href='http://www.cs.uu.nl/groups/ST/Trace/Nix'/>.  Build source
 distributions using the regular sequence:
         
 <screen>
@@ -27,7 +31,8 @@ file).</para></listitem>
 <listitem><para>Subscribe to the Nix Packages channel.
 
 <screen>
-$ nix-channel --add http://catamaran.labs.cs.uu.nl/dist/nix/channels/nixpkgs-unstable</screen>
+$ nix-channel --add \
+    http://nix.cs.uu.nl/dist/nix/channels-v3/nixpkgs-unstable</screen>
 
 </para></listitem>
 
@@ -45,7 +50,7 @@ available remotely.</para></listitem>
 available in the channel:
 
 <screen>
-$ nix-env -qa
+$ nix-env -qa ’*’ <lineannotation>(mind the quotes!)</lineannotation>
 docbook-xml-4.2
 firefox-1.0pre-PR-0.10.1
 hello-2.1.1
@@ -91,6 +96,16 @@ The latter command will upgrade each installed component for which
 there is a “newer” version (as determined by comparing the version
 numbers).</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://nix.cs.uu.nl/dist/nix/nixpkgs-unstable-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>If you're unhappy with the result of a
 <command>nix-env</command> action (e.g., an upgraded component turned
 out not to work properly), you can go back:
@@ -105,13 +120,15 @@ to get rid of unused packages, since uninstalls or upgrades don't
 actually delete them:
 
 <screen>
-$ nix-env --delete-generations old
-$ nix-store --gc</screen>
+$ nix-collect-garbage -d</screen>
 
+<!--
 The first command deletes old “generations” of your profile (making
 rollbacks impossible, but also making the components in those old
 generations available for garbage collection), while the second
-command actually deletes them.</para></listitem>
+command actually deletes them.-->
+
+</para></listitem>
 
 </orderedlist>
 

doc/manual/quote-literals.xsl

@@ -0,0 +1,44 @@
+<?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/release-notes.xml

@@ -0,0 +1,896 @@
+<article xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink">
+
+<title>Nix Release Notes</title>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.10 (October 6, 2006)</title>
+
+<note><para>This version of Nix uses Berkeley DB 4.4 instead of 4.3.
+The database is upgraded automatically, but you should be careful not
+to use old versions of Nix that still use Berkeley DB 4.3.  In
+particular, if you use a Nix installed through Nix, you should run
+
+<screen>
+$ nix-store --clear-substitutes</screen>
+
+first.</para></note>
+
+<warning><para>Also, the database schema has changed slighted to fix a
+performance issue (see below).  When you run any Nix 0.10 command for
+the first time, the database will be upgraded automatically.  This is
+irreversible.</para></warning>
+
+<itemizedlist>
+
+  
+  <!-- Usability / features -->
+
+  
+  <listitem><para><command>nix-env</command> usability improvements:
+
+    <itemizedlist>
+
+      <listitem><para>An option <option>--compare-versions</option>
+      (or <option>-c</option>) has been added to <command>nix-env
+      --query</command> to allow you to compare installed versions of
+      packages to available versions, or vice versa.  An easy way to
+      see if you are up to date with what’s in your subscribed
+      channels is <literal>nix-env -qc \*</literal>.</para></listitem>
+
+      <listitem><para><literal>nix-env --query</literal> now takes as
+      arguments a list of package names about which to show
+      information, just like <option>--install</option>, etc.: for
+      example, <literal>nix-env -q gcc</literal>.  Note that to show
+      all derivations, you need to specify
+      <literal>\*</literal>.</para></listitem>
+
+      <listitem><para><literal>nix-env -i
+      <replaceable>pkgname</replaceable></literal> will now install
+      the highest available version of
+      <replaceable>pkgname</replaceable>, rather than installing all
+      available versions (which would probably give collisions)
+      (<literal>NIX-31</literal>).</para></listitem>
+
+      <listitem><para><literal>nix-env (-i|-u) --dry-run</literal> now
+      shows exactly which missing paths will be built or
+      substituted.</para></listitem>
+
+      <listitem><para><literal>nix-env -qa --description</literal>
+      shows human-readable descriptions of packages, provided that
+      they have a <literal>meta.description</literal> attribute (which
+      most packages in Nixpkgs don’t have yet).</para></listitem>
+
+    </itemizedlist>
+  
+  </para></listitem>
+  
+
+  <listitem><para>New language features:
+
+    <itemizedlist>
+
+      <listitem><para>Reference scanning (which happens after each
+      build) is much faster and takes a constant amount of
+      memory.</para></listitem>
+
+      <listitem><para>String interpolation.  Expressions like
+
+<programlisting>
+"--with-freetype2-library=" + freetype + "/lib"</programlisting>
+
+      can now be written as
+
+<programlisting>
+"--with-freetype2-library=${freetype}/lib"</programlisting>
+
+      You can write arbitrary expressions within
+      <literal>${<replaceable>...</replaceable>}</literal>, not just
+      identifiers.</para></listitem>
+      
+      <listitem><para>Multi-line string literals.</para></listitem>
+
+      <listitem><para>String concatenations can now involve
+      derivations, as in the example <code>"--with-freetype2-library="
+      + freetype + "/lib"</code>.  This was not previously possible
+      because we need to register that a derivation that uses such a
+      string is dependent on <literal>freetype</literal>.  The
+      evaluator now properly propagates this information.
+      Consequently, the subpath operator (<literal>~</literal>) has
+      been deprecated.</para></listitem>
+
+      <listitem><para>Default values of function arguments can now
+      refer to other function arguments; that is, all arguments are in
+      scope in the default values
+      (<literal>NIX-45</literal>).</para></listitem>
+
+      <!--
+      <listitem><para>TODO: domain checks (r5895).</para></listitem>
+      -->
+
+      <listitem><para>Lots of new built-in primitives, such as
+      functions for list manipulation and integer arithmetic.  See the
+      manual for a complete list.  All primops are now available in
+      the set <varname>builtins</varname>, allowing one to test for
+      the availability of primop in a backwards-compatible
+      way.</para></listitem>
+
+      <listitem><para>Real let-expressions: <literal>let x = ...;
+      ... z = ...; in ...</literal>.</para></listitem>
+
+    </itemizedlist>
+
+  </para></listitem>
+
+
+  <listitem><para>New commands <command>nix-pack-closure</command> and
+  <command>nix-unpack-closure</command> than can be used to easily
+  transfer a store path with all its dependencies to another machine.
+  Very convenient whenever you have some package on your machine and
+  you want to copy it somewhere else.</para></listitem>
+
+  
+  <listitem><para>XML support:
+
+    <itemizedlist>
+
+      <listitem><para><literal>nix-env -q --xml</literal> prints the
+      installed or available packages in an XML representation for
+      easy processing by other tools.</para></listitem>
+
+      <listitem><para><literal>nix-instantiate --eval-only
+      --xml</literal> prints an XML representation of the resulting
+      term.  (The new flag <option>--strict</option> forces ‘deep’
+      evaluation of the result, i.e., list elements and attributes are
+      evaluated recursively.)</para></listitem>
+
+      <listitem><para>In Nix expressions, the primop
+      <function>builtins.toXML</function> converts a term to an XML
+      representation.  This is primarily useful for passing structured
+      information to builders.</para></listitem>
+
+    </itemizedlist>
+
+  </para></listitem>
+  
+
+  <listitem><para>You can now unambigously specify which derivation to
+  build or install in <command>nix-env</command>,
+  <command>nix-instantiate</command> and <command>nix-build</command>
+  using the <option>--attr</option> / <option>-A</option> flags, which
+  takes an attribute name as argument.  (Unlike symbolic package names
+  such as <literal>subversion-1.4.0</literal>, attribute names in an
+  attribute set are unique.)  For instance, a quick way to perform a
+  test build of a package in Nixpkgs is <literal>nix-build
+  pkgs/top-level/all-packages.nix -A
+  <replaceable>foo</replaceable></literal>.  <literal>nix-env -q
+  --attr</literal> shows the attribute names corresponding to each
+  derivation.</para></listitem>
+  
+
+  <listitem><para>If the top-level Nix expression used by
+  <command>nix-env</command>, <command>nix-instantiate</command> or
+  <command>nix-build</command> evaluates to a function whose arguments
+  all have default values, the function will be called automatically.
+  Also, the new command-line switch <option>--arg
+  <replaceable>name</replaceable>
+  <replaceable>value</replaceable></option> can be used to specify
+  function arguments on the command line.</para></listitem>
+
+  
+  <listitem><para><literal>nix-install-package --url
+  <replaceable>URL</replaceable></literal> allows a package to be
+  installed directly from the given URL.</para></listitem>
+
+
+  <listitem><para>Nix now works behind an HTTP proxy server; just set
+  the standard environment variables <envar>http_proxy</envar>,
+  <envar>https_proxy</envar>, <envar>ftp_proxy</envar> or
+  <envar>all_proxy</envar> appropriately.  Functions such as
+  <function>fetchurl</function> in Nixpkgs also respect these
+  variables.</para></listitem>
+
+
+  <listitem><para><literal>nix-build -o
+  <replaceable>symlink</replaceable></literal> allows the symlink to
+  the build result to be named something other than
+  <literal>result</literal>.</para></listitem>
+
+
+  <!-- Stability / performance / etc. -->
+
+
+  <listitem><para>Platform support:
+
+    <itemizedlist>
+
+      <listitem><para>Support for 64-bit platforms, provided a <link
+      xlink:href="http://bugzilla.sen.cwi.nl:8080/show_bug.cgi?id=606">suitably
+      patched ATerm library</link> is used.  Also, files larger than 2
+      GiB are now supported.</para></listitem>
+
+      <listitem><para>Added support for Cygwin (Windows,
+      <literal>i686-cygwin</literal>), Mac OS X on Intel
+      (<literal>i686-darwin</literal>) and Linux on PowerPC
+      (<literal>powerpc-linux</literal>).</para></listitem>
+
+      <listitem><para>Users of SMP and multicore machines will
+      appreciate that the number of builds to be performed in parallel
+      can now be specified in the configuration file in the
+      <literal>build-max-jobs</literal> setting.</para></listitem>
+
+    </itemizedlist>
+
+  </para></listitem>
+
+  
+  <listitem><para>Garbage collector improvements:
+
+    <itemizedlist>
+
+      <listitem><para>Open files (such as running programs) are now
+      used as roots of the garbage collector.  This prevents programs
+      that have been uninstalled from being garbage collected while
+      they are still running.  The script that detects these
+      additional runtime roots
+      (<filename>find-runtime-roots.pl</filename>) is inherently
+      system-specific, but it should work on Linux and on all
+      platforms that have the <command>lsof</command>
+      utility.</para></listitem>
+
+      <listitem><para><literal>nix-store --gc</literal>
+      (a.k.a. <command>nix-collect-garbage</command>) prints out the
+      number of bytes freed on standard output.  <literal>nix-store
+      --gc --print-dead</literal> shows how many bytes would be freed
+      by an actual garbage collection.</para></listitem>
+
+      <listitem><para><literal>nix-collect-garbage -d</literal>
+      removes all old generations of <emphasis>all</emphasis> profiles
+      before calling the actual garbage collector (<literal>nix-store
+      --gc</literal>).  This is an easy way to get rid of all old
+      packages in the Nix store.</para></listitem>
+
+      <listitem><para><command>nix-store</command> now has an
+      operation <option>--delete</option> to delete specific paths
+      from the Nix store.  It won’t delete reachable (non-garbage)
+      paths unless <option>--ignore-liveness</option> is
+      specified.</para></listitem>
+      
+    </itemizedlist>
+
+  </para></listitem>
+
+  
+  <listitem><para>Berkeley DB 4.4’s process registry feature is used
+  to recover from crashed Nix processes.</para></listitem>
+
+  <!--  <listitem><para>TODO: shared stores.</para></listitem> -->
+
+  <listitem><para>A performance issue has been fixed with the
+  <literal>referer</literal> table, which stores the inverse of the
+  <literal>references</literal> table (i.e., it tells you what store
+  paths refer to a given path).  Maintaining this table could take a
+  quadratic amount of time, as well as a quadratic amount of Berkeley
+  DB log file space (in particular when running the garbage collector)
+  (<literal>NIX-23</literal>).</para></listitem>
+
+  <listitem><para>Nix now catches the <literal>TERM</literal> and
+  <literal>HUP</literal> signals in addition to the
+  <literal>INT</literal> signal.  So you can now do a <literal>killall
+  nix-store</literal> without triggering a database
+  recovery.</para></listitem>
+
+  <listitem><para><command>bsdiff</command> updated to version
+  4.3.</para></listitem>
+
+  <listitem><para>Substantial performance improvements in expression
+  evaluation and <literal>nix-env -qa</literal>, all thanks to <link
+  xlink:href="http://valgrind.org/">Valgrind</link>.  Memory use has
+  been reduced by a factor 8 or so.  Big speedup by memoisation of
+  path hashing.</para></listitem>
+
+  <listitem><para>Lots of bug fixes, notably:
+
+    <itemizedlist>
+
+      <listitem><para>Make sure that the garbage collector can run
+      succesfully when the disk is full
+      (<literal>NIX-18</literal>).</para></listitem>
+
+      <listitem><para><command>nix-env</command> now locks the profile
+      to prevent races between concurrent <command>nix-env</command>
+      operations on the same profile
+      (<literal>NIX-7</literal>).</para></listitem>
+
+      <listitem><para>Removed misleading messages from
+      <literal>nix-env -i</literal> (e.g., <literal>installing
+      `foo'</literal> followed by <literal>uninstalling
+      `foo'</literal>) (<literal>NIX-17</literal>).</para></listitem>
+
+    </itemizedlist>
+
+  </para></listitem>
+
+  <listitem><para>Nix source distributions are a lot smaller now since
+  we no longer include a full copy of the Berkeley DB source
+  distribution (but only the bits we need).</para></listitem>
+
+  <listitem><para>Header files are now installed so that external
+  programs can use the Nix libraries.</para></listitem>
+
+</itemizedlist>
+
+</section>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.9.2 (September 21, 2005)</title>
+
+<para>This bug fix release fixes two problems on Mac OS X:
+
+<itemizedlist>
+
+  <listitem><para>If Nix was linked against statically linked versions
+  of the ATerm or Berkeley DB library, there would be dynamic link
+  errors at runtime.</para></listitem>
+
+  <listitem><para><command>nix-pull</command> and
+  <command>nix-push</command> intermittently failed due to race
+  conditions involving pipes and child processes with error messages
+  such as <literal>open2: open(GLOB(0x180b2e4), >&amp;=9) failed: Bad
+  file descriptor at /nix/bin/nix-pull line 77</literal> (issue
+  <literal>NIX-14</literal>).</para></listitem>
+
+</itemizedlist>
+
+</para>
+
+</section>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.9.1 (September 20, 2005)</title>
+
+<para>This bug fix release addresses a problem with the ATerm library
+when the <option>--with-aterm</option> flag in
+<command>configure</command> was <emphasis>not</emphasis> used.</para>
+
+</section>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.9 (September 16, 2005)</title>
+
+<para>NOTE: this version of Nix uses Berkeley DB 4.3 instead of 4.2.
+The database is upgraded automatically, but you should be careful not
+to use old versions of Nix that still use Berkeley DB 4.2.  In
+particular, if you use a Nix installed through Nix, you should run
+
+<screen>
+$ nix-store --clear-substitutes</screen>
+
+first.</para>
+
+
+<itemizedlist>
+
+  <listitem><para>Unpacking of patch sequences is much faster now
+  since we no longer do redundant unpacking and repacking of
+  intermediate paths.</para></listitem>
+
+  <listitem><para>Nix now uses Berkeley DB 4.3.</para></listitem>
+
+  <listitem><para>The <function>derivation</function> primitive is
+  lazier.  Attributes of dependent derivations can mutually refer to
+  each other (as long as there are no data dependencies on the
+  <varname>outPath</varname> and <varname>drvPath</varname> attributes
+  computed by <function>derivation</function>).</para>
+
+  <para>For example, the expression <literal>derivation
+  attrs</literal> now evaluates to (essentially)
+
+  <programlisting>
+attrs // {
+  type = "derivation";
+  outPath = derivation! attrs;
+  drvPath = derivation! attrs;
+}</programlisting>
+
+  where <function>derivation!</function> is a primop that does the
+  actual derivation instantiation (i.e., it does what
+  <function>derivation</function> used to do).  The advantage is that
+  it allows commands such as <command>nix-env -qa</command> and
+  <command>nix-env -i</command> to be much faster since they no longer
+  need to instantiate all derivations, just the
+  <varname>name</varname> attribute.</para>
+
+  <para>Also, it allows derivations to cyclically reference each
+  other, for example,
+
+  <programlisting>
+webServer = derivation {
+  ...
+  hostName = "svn.cs.uu.nl";
+  services = [svnService];
+};
+&#x20;
+svnService = derivation {
+  ...
+  hostName = webServer.hostName;
+};</programlisting>
+
+  Previously, this would yield a black hole (infinite recursion).</para>
+  
+  </listitem>
+
+  <listitem><para><command>nix-build</command> now defaults to using
+  <filename>./default.nix</filename> if no Nix expression is
+  specified.</para></listitem>
+
+  <listitem><para><command>nix-instantiate</command>, when applied to
+  a Nix expression that evaluates to a function, will call the
+  function automatically if all its arguments have
+  defaults.</para></listitem>
+
+  <listitem><para>Nix now uses libtool to build dynamic libraries.
+  This reduces the size of executables.</para></listitem>
+
+  <listitem><para>A new list concatenation operator
+  <literal>++</literal>.  For example, <literal>[1 2 3] ++ [4 5
+  6]</literal> evaluates to <literal>[1 2 3 4 5
+  6]</literal>.</para></listitem>
+
+  <listitem><para>Some currently undocumented primops to support
+  low-level build management using Nix (i.e., using Nix as a Make
+  replacement).  See the commit messages for <literal>r3578</literal>
+  and <literal>r3580</literal>.</para></listitem>
+
+  <listitem><para>Various bug fixes and performance
+  improvements.</para></listitem>
+
+</itemizedlist>
+
+</section>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.8.1 (April 13, 2005)</title>
+
+<para>This is a bug fix release.</para>
+
+<itemizedlist>
+
+  <listitem><para>Patch downloading was broken.</para></listitem>
+
+  <listitem><para>The garbage collector would not delete paths that
+  had references from invalid (but substitutable)
+  paths.</para></listitem>
+
+</itemizedlist>
+
+</section>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.8 (April 11, 2005)</title>
+
+<para>NOTE: the hashing scheme in Nix 0.8 changed (as detailed below).
+As a result, <command>nix-pull</command> manifests and channels built
+for Nix 0.7 and below will now work anymore.  However, the Nix
+expression language has not changed, so you can still build from
+source.  Also, existing user environments continue to work.  Nix 0.8
+will automatically upgrade the database schema of previous
+installations when it is first run.</para>
+
+<para>If you get the error message
+
+<screen>
+you have an old-style manifest `/nix/var/nix/manifests/[...]'; please
+delete it</screen>
+
+you should delete previously downloaded manifests:
+
+<screen>
+$ rm /nix/var/nix/manifests/*</screen>
+
+If <command>nix-channel</command> gives the error message
+
+<screen>
+manifest `http://catamaran.labs.cs.uu.nl/dist/nix/channels/[channel]/MANIFEST'
+is too old (i.e., for Nix &lt;= 0.7)</screen>
+
+then you should unsubscribe from the offending channel
+(<command>nix-channel --remove
+<replaceable>URL</replaceable></command>; leave out
+<literal>/MANIFEST</literal>), and subscribe to the same URL, with
+<literal>channels</literal> replaced by <literal>channels-v3</literal>
+(e.g., <link
+xlink:href='http://catamaran.labs.cs.uu.nl/dist/nix/channels-v3/nixpkgs-unstable'
+/>).</para>
+
+<para>Nix 0.8 has the following improvements:
+
+<itemizedlist>
+
+  <listitem><para>The cryptographic hashes used in store paths are now
+  160 bits long, but encoded in base-32 so that they are still only 32
+  characters long (e.g.,
+  <filename>/nix/store/csw87wag8bqlqk7ipllbwypb14xainap-atk-1.9.0</filename>).
+  (This is actually a 160 bit truncation of a SHA-256
+  hash.)</para></listitem>
+
+  <listitem><para>Big cleanups and simplifications of the basic store
+  semantics.  The notion of “closure store expressions” is gone (and
+  so is the notion of “successors”); the file system references of a
+  store path are now just stored in the database.</para>
+
+  <para>For instance, given any store path, you can query its closure:
+
+  <screen>
+$ nix-store -qR $(which firefox)
+... lots of paths ...</screen>
+
+  Also, Nix now remembers for each store path the derivation that
+  built it (the “deriver”):
+
+  <screen>
+$ nix-store -qR $(which firefox)
+/nix/store/4b0jx7vq80l9aqcnkszxhymsf1ffa5jd-firefox-1.0.1.drv</screen>
+
+  So to see the build-time dependencies, you can do
+
+  <screen>
+$ nix-store -qR $(nix-store -qd $(which firefox))</screen>
+
+  or, in a nicer format:
+
+  <screen>
+$ nix-store -q --tree $(nix-store -qd $(which firefox))</screen>
+
+  </para>
+
+  <para>File system references are also stored in reverse.  For
+  instance, you can query all paths that directly or indirectly use a
+  certain Glibc:
+
+  <screen>
+$ nix-store -q --referrers-closure \
+    /nix/store/8lz9yc6zgmc0vlqmn2ipcpkjlmbi51vv-glibc-2.3.4</screen>
+
+  </para>
+  
+  </listitem>
+
+  <listitem><para>The concept of fixed-output derivations has been
+  formalised.  Previously, functions such as
+  <function>fetchurl</function> in Nixpkgs used a hack (namely,
+  explicitly specifying a store path hash) to prevent changes to, say,
+  the URL of the file from propagating upwards through the dependency
+  graph, causing rebuilds of everything.  This can now be done cleanly
+  by specifying the <varname>outputHash</varname> and
+  <varname>outputHashAlgo</varname> attributes.  Nix itself checks
+  that the content of the output has the specified hash.  (This is
+  important for maintaining certain invariants necessary for future
+  work on secure shared stores.)</para></listitem>
+
+  <listitem><para>One-click installation :-) It is now possible to
+  install any top-level component in Nixpkgs directly, through the web
+  — see, e.g., <link
+  xlink:href='http://catamaran.labs.cs.uu.nl/dist/nixpkgs-0.8/' />.
+  All you have to do is associate
+  <filename>/nix/bin/nix-install-package</filename> with the MIME type
+  <literal>application/nix-package</literal> (or the extension
+  <filename>.nixpkg</filename>), and clicking on a package link will
+  cause it to be installed, with all appropriate dependencies.  If you
+  just want to install some specific application, this is easier than
+  subscribing to a channel.</para></listitem>
+
+  <listitem><para><command>nix-store -r
+  <replaceable>PATHS</replaceable></command> now builds all the
+  derivations PATHS in parallel.  Previously it did them sequentially
+  (though exploiting possible parallelism between subderivations).
+  This is nice for build farms.</para></listitem>
+
+  <listitem><para><command>nix-channel</command> has new operations
+  <option>--list</option> and
+  <option>--remove</option>.</para></listitem>
+
+  <listitem><para>New ways of installing components into user
+  environments:
+
+  <itemizedlist>
+
+    <listitem><para>Copy from another user environment:
+
+    <screen>
+$ nix-env -i --from-profile .../other-profile firefox</screen>
+
+    </para></listitem>
+
+    <listitem><para>Install a store derivation directly (bypassing the
+    Nix expression language entirely):
+
+    <screen>
+$ nix-env -i /nix/store/z58v41v21xd3...-aterm-2.3.1.drv</screen>
+
+    (This is used to implement <command>nix-install-package</command>,
+    which is therefore immune to evolution in the Nix expression
+    language.)</para></listitem>
+
+    <listitem><para>Install an already built store path directly:
+
+    <screen>
+$ nix-env -i /nix/store/hsyj5pbn0d9i...-aterm-2.3.1</screen>
+
+    </para></listitem>
+
+    <listitem><para>Install the result of a Nix expression specified
+    as a command-line argument:
+
+    <screen>
+$ nix-env -f .../i686-linux.nix -i -E 'x: x.firefoxWrapper'</screen>
+
+    The difference with the normal installation mode is that
+    <option>-E</option> does not use the <varname>name</varname>
+    attributes of derivations.  Therefore, this can be used to
+    disambiguate multiple derivations with the same
+    name.</para></listitem>
+
+  </itemizedlist></para></listitem>
+
+  <listitem><para>A hash of the contents of a store path is now stored
+  in the database after a succesful build.  This allows you to check
+  whether store paths have been tampered with: <command>nix-store
+  --verify --check-contents</command>.</para></listitem>
+
+  <listitem>
+
+    <para>Implemented a concurrent garbage collector.  It is now
+    always safe to run the garbage collector, even if other Nix
+    operations are happening simultaneously.</para>
+
+    <para>However, there can still be GC races if you use
+    <command>nix-instantiate</command> and <command>nix-store
+    --realise</command> directly to build things.  To prevent races,
+    use the <option>--add-root</option> flag of those commands.</para>
+
+  </listitem>
+
+  <listitem><para>The garbage collector now finally deletes paths in
+  the right order (i.e., topologically sorted under the “references”
+  relation), thus making it safe to interrupt the collector without
+  risking a store that violates the closure
+  invariant.</para></listitem>
+
+  <listitem><para>Likewise, the substitute mechanism now downloads
+  files in the right order, thus preserving the closure invariant at
+  all times.</para></listitem>
+
+  <listitem><para>The result of <command>nix-build</command> is now
+  registered as a root of the garbage collector.  If the
+  <filename>./result</filename> link is deleted, the GC root
+  disappears automatically.</para></listitem>
+
+  <listitem>
+
+    <para>The behaviour of the garbage collector can be changed
+    globally by setting options in
+    <filename>/nix/etc/nix/nix.conf</filename>.
+
+    <itemizedlist>
+
+      <listitem><para><literal>gc-keep-derivations</literal> specifies
+      whether deriver links should be followed when searching for live
+      paths.</para></listitem>
+
+      <listitem><para><literal>gc-keep-outputs</literal> specifies
+      whether outputs of derivations should be followed when searching
+      for live paths.</para></listitem>
+
+      <listitem><para><literal>env-keep-derivations</literal>
+      specifies whether user environments should store the paths of
+      derivations when they are added (thus keeping the derivations
+      alive).</para></listitem>
+
+    </itemizedlist>
+
+  </para></listitem>
+
+  <listitem><para>New <command>nix-env</command> query flags
+  <option>--drv-path</option> and
+  <option>--out-path</option>.</para></listitem>
+
+  <listitem><para><command>fetchurl</command> allows SHA-1 and SHA-256
+  in addition to MD5.  Just specify the attribute
+  <varname>sha1</varname> or <varname>sha256</varname> instead of
+  <varname>md5</varname>.</para></listitem>
+
+  <listitem><para>Manual updates.</para></listitem>
+
+</itemizedlist>
+
+</para>
+
+</section>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.7 (January 12, 2005)</title>
+
+<itemizedlist>
+
+  <listitem><para>Binary patching.  When upgrading components using
+  pre-built binaries (through nix-pull / nix-channel), Nix can
+  automatically download and apply binary patches to already installed
+  components instead of full downloads.  Patching is “smart”: if there
+  is a <emphasis>sequence</emphasis> of patches to an installed
+  component, Nix will use it.  Patches are currently generated
+  automatically between Nixpkgs (pre-)releases.</para></listitem>
+
+  <listitem><para>Simplifications to the substitute
+  mechanism.</para></listitem>
+
+  <listitem><para>Nix-pull now stores downloaded manifests in
+  <filename>/nix/var/nix/manifests</filename>.</para></listitem>
+
+  <listitem><para>Metadata on files in the Nix store is canonicalised
+  after builds: the last-modified timestamp is set to 0 (00:00:00
+  1/1/1970), the mode is set to 0444 or 0555 (readable and possibly
+  executable by all; setuid/setgid bits are dropped), and the group is
+  set to the default.  This ensures that the result of a build and an
+  installation through a substitute is the same; and that timestamp
+  dependencies are revealed.</para></listitem>
+
+</itemizedlist>
+
+</section>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.6 (November 14, 2004)</title>
+
+<itemizedlist>
+
+  <listitem>
+    <para>Rewrite of the normalisation engine.
+
+    <itemizedlist>
+
+      <listitem><para>Multiple builds can now be performed in parallel
+      (option <option>-j</option>).</para></listitem>
+
+      <listitem><para>Distributed builds.  Nix can now call a shell
+      script to forward builds to Nix installations on remote
+      machines, which may or may not be of the same platform
+      type.</para></listitem>
+
+      <listitem><para>Option <option>--fallback</option> allows
+      recovery from broken substitutes.</para></listitem>
+
+      <listitem><para>Option <option>--keep-going</option> causes
+      building of other (unaffected) derivations to continue if one
+      failed.</para></listitem>
+
+    </itemizedlist>
+
+    </para>
+
+  </listitem>
+
+  <listitem><para>Improvements to the garbage collector (i.e., it
+  should actually work now).</para></listitem>
+
+  <listitem><para>Setuid Nix installations allow a Nix store to be
+  shared among multiple users.</para></listitem>
+
+  <listitem><para>Substitute registration is much faster
+  now.</para></listitem>
+
+  <listitem><para>A utility <command>nix-build</command> to build a
+  Nix expression and create a symlink to the result int the current
+  directory; useful for testing Nix derivations.</para></listitem>
+
+  <listitem><para>Manual updates.</para></listitem>
+
+  <listitem>
+
+    <para><command>nix-env</command> changes:
+
+    <itemizedlist>
+
+      <listitem><para>Derivations for other platforms are filtered out
+      (which can be overriden using
+      <option>--system-filter</option>).</para></listitem>
+
+      <listitem><para><option>--install</option> by default now
+      uninstall previous derivations with the same
+      name.</para></listitem>
+
+      <listitem><para><option>--upgrade</option> allows upgrading to a
+      specific version.</para></listitem>
+
+      <listitem><para>New operation
+      <option>--delete-generations</option> to remove profile
+      generations (necessary for effective garbage
+      collection).</para></listitem>
+
+      <listitem><para>Nicer output (sorted,
+      columnised).</para></listitem>
+
+    </itemizedlist>
+    
+    </para>
+
+  </listitem>
+
+  <listitem><para>More sensible verbosity levels all around (builder
+  output is now shown always, unless <option>-Q</option> is
+  given).</para></listitem>
+
+  <listitem>
+
+    <para>Nix expression language changes:
+
+    <itemizedlist>
+      
+      <listitem><para>New language construct: <literal>with
+      <replaceable>E1</replaceable>;
+      <replaceable>E2</replaceable></literal> brings all attributes
+      defined in the attribute set <replaceable>E1</replaceable> in
+      scope in <replaceable>E2</replaceable>.</para></listitem>
+
+      <listitem><para>Added a <function>map</function>
+      function.</para></listitem>
+
+      <listitem><para>Various new operators (e.g., string
+      concatenation).</para></listitem>
+
+    </itemizedlist>
+
+    </para>
+
+  </listitem>
+
+  <listitem><para>Expression evaluation is much
+  faster.</para></listitem>
+
+  <listitem><para>An Emacs mode for editing Nix expressions (with
+  syntax highlighting and indentation) has been
+  added.</para></listitem>
+
+  <listitem><para>Many bug fixes.</para></listitem>
+
+</itemizedlist>
+
+</section>
+
+
+
+<!--==================================================================-->
+
+<section><title>Release 0.5 and earlier</title>
+
+<para>Please refer to the Subversion commit log messages.</para>
+
+</section>
+
+
+
+</article>

doc/manual/style.css

@@ -10,7 +10,6 @@ body
 {
     font-family: sans-serif;
     background: white;
-  
     margin: 2em 1em 2em 1em;
 }
 
@@ -34,16 +33,28 @@ h2 /* chapters, appendices, subtitle */
 div.chapter > div.titlepage h2, div.appendix > div.titlepage h2 
 { 
     margin-top: 1.5em;
-/*    border-top: solid #005aa0; */
 }
 
-div.sect1 h2 /* sections */
+div.section > div.titlepage h2 /* sections */
 {
     font-size: 150%;
+    margin-top: 1.5em;
+}
+
+h3 /* subsections */
+{
+    font-size: 125%;
+}
+
+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%;
 }
 
@@ -52,30 +63,23 @@ div.refsection h3
     font-size: 110%;
 }
 
-h3 /* subsections */
-{
-    font-size: 125%;
-}
-
-
 
 /***************************************************************************
-                               Program listings:
+                               Examples:
  ***************************************************************************/
 
 div.example
 {
     border: 1px solid #6185a0;
     padding: 6px 6px;
-    margin-left: 3em;
-    margin-right: 3em;
-    background: #eeeeee;
+    margin-left: 1.5em;
+    margin-right: 1.5em;
+    background: #f4f4f8;
 }
 
-pre.programlisting
+div.example p.title
 {
-    color: #600000;
-    font-family: monospace;
+    margin-top: 0em;
 }
 
 
@@ -83,41 +87,63 @@ pre.programlisting
                             Screen dumps:
  ***************************************************************************/
 
-pre.screen
+pre.screen, pre.programlisting
 {
     border: 1px solid #6185a0;
-    padding: 6px 6px;
-    margin-left: 3em;
-    margin-right: 3em;
+    padding: 3px 3px;
+    margin-left: 1.5em;
+    margin-right: 1.5em;
     color: #600000;
-    background: #eeeeee;
+    background: #f4f4f8;
     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
 {
-    margin-top: 1em;
-    margin-bottom: 1em;
     border: 1px solid #6185a0;
-    padding: 0px 1em;
+    padding: 3px 3px;
+    margin-left: 1.5em;
+    margin-right: 1.5em;
+    margin-bottom: 1em;
+    padding: 0.3em 0.3em 0.3em 0.3em;
     background: #fffff5;
 }
 
-div.note,div.warning
+div.note, div.warning
 {
     font-style: italic;
 }
 
-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
@@ -167,9 +193,19 @@ tt, code
     
 }
 
-div.variablelist dd
+div.variablelist dd p, div.glosslist dd p
 {
-    margin-bottom: 1em;
+    margin-top: 0em;
+}
+
+div.variablelist dd, div.glosslist dd
+{
+    margin-left: 1.5em;
+}
+
+div.glosslist dt
+{
+    font-style: italic;
 }
 
 .default
@@ -232,3 +268,16 @@ 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

@@ -1,9 +1,13 @@
-<appendix><title>Troubleshooting</title>
+<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.</para>
 
 
-<sect1><title>Berkeley DB: <quote>Cannot allocate memory</quote></title>
+<section><title>Berkeley DB: <quote>Cannot allocate memory</quote></title>
 
 <para>Symptom: Nix operations (in particular the
 <command>nix-store</command> operations <option>--gc</option>,
@@ -26,10 +30,10 @@ $ rm __db.00*</screen>
 
 </para>
 
-</sect1>
+</section>
 
 
-<sect1><title>Collisions in <command>nix-env</command></title>
+<section><title>Collisions in <command>nix-env</command></title>
 
 <para>Symptom: when installing or upgrading, you get an error message such as
 
@@ -55,7 +59,7 @@ 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
--u</command>, or specify exactly which version should be installed
+-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
@@ -65,7 +69,47 @@ 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>
 
-</sect1>
+</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.</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>

externals/Makefile.am

@@ -1,16 +1,17 @@
 # Berkeley DB
 
-DB = db-4.3.28.NC
+DB = db-4.4.20.NC
 
 $(DB).tar.gz:
 	@echo "Nix requires Berkeley DB to build."
-	@echo "Please download version 4.3.28 from"
-	@echo "  http://downloads.sleepycat.com/db-4.3.28.NC.tar.gz"
+	@echo "Please download version 4.4.20 from"
+	@echo "  http://downloads.sleepycat.com/db-4.4.20.NC.tar.gz"
 	@echo "and place it in the externals/ directory."
 	false
 
 $(DB): $(DB).tar.gz
-	gunzip < $(DB).tar.gz | tar xvf -
+	gunzip < $(srcdir)/$(DB).tar.gz | tar xvf -
+	(cd $(DB) && $(patch) -p1) < $(srcdir)/bdb-cygwin.patch
 
 have-db:
 	$(MAKE) $(DB)
@@ -27,24 +28,26 @@ build-db: have-db
 	 --enable-cxx --disable-shared --disable-cryptography \
          --disable-replication --disable-verify && \
 	$(MAKE) && \
-	$(MAKE) install)
+	$(MAKE) install_include install_lib)
 	touch build-db
 endif
 
 
 # CWI ATerm
 
-ATERM = aterm-2.3.1
+ATERM = aterm-2.4.2
 
 $(ATERM).tar.gz:
 	@echo "Nix requires the CWI ATerm library to build."
-	@echo "Please download version 2.3.1 from"
-	@echo "  http://www.cwi.nl/projects/MetaEnv/aterm/aterm-2.3.1.tar.gz"
+	@echo "Please download version 2.4.2 from"
+	@echo "  http://www.cwi.nl/projects/MetaEnv/aterm/aterm-2.4.2.tar.gz"
 	@echo "and place it in the externals/ directory."
 	false
 
 $(ATERM): $(ATERM).tar.gz
-	gunzip < $(ATERM).tar.gz | tar xvf -
+	gunzip < $(srcdir)/$(ATERM).tar.gz | tar xvf -
+	(cd $(ATERM) && $(patch) -p1) < $(srcdir)/aterm-aliasing.patch
+#	(cd $(ATERM) && $(patch) -p1) < $(srcdir)/aterm-64-bit.patch
 
 have-aterm:
 	$(MAKE) $(ATERM)
@@ -56,17 +59,53 @@ else
 build-aterm: have-aterm
 	(pfx=`pwd` && \
 	cd $(ATERM) && \
-	CC="$(CC)" ./configure --prefix=$$pfx/inst-aterm && \
+	CC="$(CC)" ./configure --prefix=$$pfx/inst-aterm \
+	  --disable-shared --enable-static && \
 	$(MAKE) && \
 	$(MAKE) install)
 	touch build-aterm
 endif
 
 
-all: build-db build-aterm
+# bzip2
 
-EXTRA_DIST = $(DB).tar.gz $(ATERM).tar.gz
+BZIP2 = bzip2-1.0.3
+
+$(BZIP2).tar.gz:
+	@echo "Nix requires bzip2 to build."
+	@echo "Please download version 1.0.3 from"
+	@echo "  http://www.bzip.org/1.0.3/bzip2-1.0.3.tar.gz"
+	@echo "and place it in the externals/ directory."
+	false
+
+$(BZIP2): $(BZIP2).tar.gz
+	gunzip < $(srcdir)/$(BZIP2).tar.gz | tar xvf -
+
+have-bzip2:
+	$(MAKE) $(BZIP2)
+	touch have-bzip2
+
+if HAVE_BZIP2
+build-bzip2:
+else
+build-bzip2: have-bzip2
+	(pfx=`pwd` && \
+	cd $(BZIP2) && \
+	$(MAKE) && \
+	$(MAKE) install PREFIX=$$pfx/inst-bzip2)
+	touch build-bzip2
+
+install:
+	mkdir -p $(DESTDIR)${bzip2_bin}
+	$(INSTALL_PROGRAM) $(bzip2_bin_test)/bzip2 $(bzip2_bin_test)/bunzip2 $(DESTDIR)${bzip2_bin}
+endif
+
+
+all: build-db build-aterm build-bzip2
+
+EXTRA_DIST = $(DB).tar.gz $(ATERM).tar.gz $(BZIP2).tar.gz \
+  bdb-cygwin.patch aterm-aliasing.patch aterm-64-bit.patch
 
 ext-clean:
 	$(RM) -f have-db build-db have-aterm build-aterm
-	$(RM) -rf $(DB) $(ATERM)
+	$(RM) -rf $(DB) $(ATERM) $(BZIP2)

externals/aterm-64-bit.patch

@@ -0,0 +1,661 @@
+diff -rc aterm-2.4.2-orig/aterm/bafio.c aterm-2.4.2/aterm/bafio.c
+*** aterm-2.4.2-orig/aterm/bafio.c	2004-02-02 12:24:34.000000000 +0100
+--- aterm-2.4.2/aterm/bafio.c	2006-09-22 13:39:07.000000000 +0200
+***************
+*** 222,227 ****
+--- 222,229 ----
+      }
+    }
+  
++   if (val) return -1;
++ 
+    /* Ok */
+    return 0;
+  }
+***************
+*** 544,551 ****
+    * terms have been sorted by symbol.
+  	*/
+  
+! void gather_top_symbols(sym_entry *cur_entry, int cur_arg, 
+! 			int total_top_symbols)
+  {
+    int index;
+    unsigned int hnr;
+--- 546,553 ----
+    * terms have been sorted by symbol.
+  	*/
+  
+! static void gather_top_symbols(sym_entry *cur_entry, int cur_arg, 
+! 			       int total_top_symbols)
+  {
+    int index;
+    unsigned int hnr;
+***************
+*** 899,905 ****
+    } else {
+      switch(ATgetType(t)) {
+      case AT_INT:
+!       if(writeBits(ATgetInt((ATermInt)t), HEADER_BITS, writer) < 0) {
+  	return ATfalse;
+        }
+  #if 0
+--- 901,908 ----
+    } else {
+      switch(ATgetType(t)) {
+      case AT_INT:
+!       /* If ATerm integers are > 32 bits, then this can fail. */
+!       if(writeBits(ATgetInt((ATermInt)t), INT_SIZE_IN_BAF, writer) < 0) {
+  	return ATfalse;
+        }
+  #if 0
+***************
+*** 1033,1039 ****
+  /*}}}  */
+  /*{{{  ATbool write_baf(ATerm t, byte_writer *writer) */
+  
+! ATbool
+  write_baf(ATerm t, byte_writer *writer)
+  {
+    int nr_unique_terms = 0;
+--- 1036,1042 ----
+  /*}}}  */
+  /*{{{  ATbool write_baf(ATerm t, byte_writer *writer) */
+  
+! static ATbool
+  write_baf(ATerm t, byte_writer *writer)
+  {
+    int nr_unique_terms = 0;
+***************
+*** 1233,1239 ****
+  	* Read a single symbol from file.
+  	*/
+  
+! Symbol read_symbol(byte_reader *reader)
+  {
+    unsigned int arity, quoted;
+    int len;
+--- 1236,1242 ----
+  	* Read a single symbol from file.
+  	*/
+  
+! static Symbol read_symbol(byte_reader *reader)
+  {
+    unsigned int arity, quoted;
+    int len;
+***************
+*** 1260,1266 ****
+   * Read all symbols from file.
+   */
+  
+! ATbool read_all_symbols(byte_reader *reader)
+  {
+    unsigned int val;
+    int i, j, k, arity;
+--- 1263,1269 ----
+   * Read all symbols from file.
+   */
+  
+! static ATbool read_all_symbols(byte_reader *reader)
+  {
+    unsigned int val;
+    int i, j, k, arity;
+***************
+*** 1280,1293 ****
+      /*}}}  */
+      /*{{{  Read term count and allocate space */
+  
+!     if(readInt(&val, reader) < 0)
+        return ATfalse;
+      read_symbols[i].nr_terms = val;
+      read_symbols[i].term_width = bit_width(val);
+!     if(val == 0)
+!       read_symbols[i].terms = NULL;
+!     else
+!       read_symbols[i].terms = (ATerm *)calloc(val, sizeof(ATerm));
+      if(!read_symbols[i].terms)
+        ATerror("read_symbols: could not allocate space for %d terms.\n", val);
+      ATprotectArray(read_symbols[i].terms, val);
+--- 1283,1293 ----
+      /*}}}  */
+      /*{{{  Read term count and allocate space */
+  
+!     if(readInt(&val, reader) < 0 || val == 0)
+        return ATfalse;
+      read_symbols[i].nr_terms = val;
+      read_symbols[i].term_width = bit_width(val);
+!     read_symbols[i].terms = (ATerm *)calloc(val, sizeof(ATerm));
+      if(!read_symbols[i].terms)
+        ATerror("read_symbols: could not allocate space for %d terms.\n", val);
+      ATprotectArray(read_symbols[i].terms, val);
+***************
+*** 1351,1357 ****
+  /*}}}  */
+  /*{{{  ATerm read_term(sym_read_entry *sym, byte_reader *reader) */
+  
+! ATerm read_term(sym_read_entry *sym, byte_reader *reader)
+  {
+    unsigned int val;
+    int i, arity = sym->arity;
+--- 1351,1357 ----
+  /*}}}  */
+  /*{{{  ATerm read_term(sym_read_entry *sym, byte_reader *reader) */
+  
+! static ATerm read_term(sym_read_entry *sym, byte_reader *reader)
+  {
+    unsigned int val;
+    int i, arity = sym->arity;
+***************
+*** 1365,1370 ****
+--- 1365,1371 ----
+      ATprotectArray(args, arity);
+      if(!args)
+        ATerror("could not allocate space for %d arguments.\n", arity);
++     /* !!! leaks memory on the "return NULL" paths */
+    }
+  
+    /*ATfprintf(stderr, "reading term over symbol %y\n", sym->sym);*/
+***************
+*** 1372,1377 ****
+--- 1373,1380 ----
+      /*ATfprintf(stderr, "  reading argument %d (%d)", i, sym->sym_width[i]);*/
+      if(readBits(&val, sym->sym_width[i], reader) < 0)
+        return NULL;
++     if(val >= sym->nr_topsyms[i])
++       return NULL;
+      arg_sym = &read_symbols[sym->topsyms[i][val]];
+      /*		ATfprintf(stderr, "argument %d, symbol index = %d, symbol = %y\n", 
+  		i, val, arg_sym->sym);*/
+***************
+*** 1381,1386 ****
+--- 1384,1391 ----
+      if(readBits(&val, arg_sym->term_width, reader) < 0)
+        return NULL;
+      /*		ATfprintf(stderr, "arg term index = %d\n", val);*/
++     if(val >= arg_sym->nr_terms)
++       return NULL;
+      if(!arg_sym->terms[val]) {
+        arg_sym->terms[val] = read_term(arg_sym, reader);
+        if(!arg_sym->terms[val])
+***************
+*** 1396,1402 ****
+    case AS_INT:
+      /*{{{  Read an integer */
+  
+!     if(readBits(&val, HEADER_BITS, reader) < 0)
+        return NULL;
+  
+      result = (ATerm)ATmakeInt((int)val);
+--- 1401,1407 ----
+    case AS_INT:
+      /*{{{  Read an integer */
+  
+!     if(readBits(&val, INT_SIZE_IN_BAF, reader) < 0)
+        return NULL;
+  
+      result = (ATerm)ATmakeInt((int)val);
+***************
+*** 1494,1502 ****
+    for(i=0; i<nr_unique_symbols; i++) {
+      sym_read_entry *entry = &read_symbols[i];
+  
+!     ATunprotectArray(entry->terms);
+!     if(entry->terms)
+        free(entry->terms);
+      if(entry->nr_topsyms)
+        free(entry->nr_topsyms);
+      if(entry->sym_width)
+--- 1499,1508 ----
+    for(i=0; i<nr_unique_symbols; i++) {
+      sym_read_entry *entry = &read_symbols[i];
+  
+!     if(entry->terms) {
+!       ATunprotectArray(entry->terms);
+        free(entry->terms);
++     }
+      if(entry->nr_topsyms)
+        free(entry->nr_topsyms);
+      if(entry->sym_width)
+Only in aterm-2.4.2/aterm: config.h.in
+diff -rc aterm-2.4.2-orig/aterm/encoding.h aterm-2.4.2/aterm/encoding.h
+*** aterm-2.4.2-orig/aterm/encoding.h	2004-06-01 10:29:02.000000000 +0200
+--- aterm-2.4.2/aterm/encoding.h	2006-09-22 13:39:07.000000000 +0200
+***************
+*** 10,15 ****
+--- 10,17 ----
+  {
+  #endif/* __cplusplus */
+  
++ #include "config.h"
++ 
+  /*
+   |--------------------------------|
+   |info|type |arity|quoted|mark|age|
+***************
+*** 31,37 ****
+  #define SHIFT_REMOVE_MARK_AGE 3
+  #define MASK_AGE_MARK   (MASK_AGE|MASK_MARK)
+  
+! #if AT_64BIT
+  #define SHIFT_LENGTH  34
+  #define HEADER_BITS 64
+  typedef unsigned long header_type;
+--- 33,39 ----
+  #define SHIFT_REMOVE_MARK_AGE 3
+  #define MASK_AGE_MARK   (MASK_AGE|MASK_MARK)
+  
+! #ifdef AT_64BIT
+  #define SHIFT_LENGTH  34
+  #define HEADER_BITS 64
+  typedef unsigned long header_type;
+***************
+*** 137,142 ****
+--- 139,150 ----
+  #define AT_TABLE_SIZE(table_class)  (1<<(table_class))
+  #define AT_TABLE_MASK(table_class)  (AT_TABLE_SIZE(table_class)-1)
+  
++ 
++ /* Integers in BAF are always exactly 32 bits.  The size must be fixed so that
++  * BAF terms can be exchanged between platforms. */
++ #define INT_SIZE_IN_BAF 32
++ 
++ 
+  #ifdef __cplusplus
+  }
+  #endif/* __cplusplus */ 
+diff -rc aterm-2.4.2-orig/aterm/gc.c aterm-2.4.2/aterm/gc.c
+*** aterm-2.4.2-orig/aterm/gc.c	2004-06-01 10:29:02.000000000 +0200
+--- aterm-2.4.2/aterm/gc.c	2006-09-22 13:39:07.000000000 +0200
+***************
+*** 154,166 ****
+      }
+  
+  #ifdef AT_64BIT
+!     odd_term = *((ATerm *)((MachineWord)cur)+4);
+      real_term = AT_isInsideValidTerm(odd_term);
+      if (real_term != NULL) {
+        AT_markTerm(odd_term);
+      }
+  
+!     odd_sym = *((AFun *)((MachineWord)cur)+4);
+      if (AT_isValidSymbol(odd_sym)) {
+          /*fprintf(stderr,"mark_memory: AT_markSymbol(%d)\n",odd_sym);*/
+        AT_markSymbol(odd_sym);
+--- 154,166 ----
+      }
+  
+  #ifdef AT_64BIT
+!     odd_term = *((ATerm *)(((MachineWord)cur)+4));
+      real_term = AT_isInsideValidTerm(odd_term);
+      if (real_term != NULL) {
+        AT_markTerm(odd_term);
+      }
+  
+!     odd_sym = *((AFun *)(((MachineWord)cur)+4));
+      if (AT_isValidSymbol(odd_sym)) {
+          /*fprintf(stderr,"mark_memory: AT_markSymbol(%d)\n",odd_sym);*/
+        AT_markSymbol(odd_sym);
+***************
+*** 198,210 ****
+      }
+  
+  #ifdef AT_64BIT
+!     odd_term = *((ATerm *)((MachineWord)cur)+4);
+      real_term = AT_isInsideValidTerm(odd_term);
+      if (real_term != NULL) {
+        AT_markTerm_young(odd_term);
+      }
+  
+!     odd_sym = *((AFun *)((MachineWord)cur)+4);
+      if (AT_isValidSymbol(odd_sym)) {
+          /*fprintf(stderr,"mark_memory_young: AT_markSymbol_young(%d)\n",odd_sym);*/
+        AT_markSymbol_young(odd_sym);
+--- 198,210 ----
+      }
+  
+  #ifdef AT_64BIT
+!     odd_term = *((ATerm *)(((MachineWord)cur)+4));
+      real_term = AT_isInsideValidTerm(odd_term);
+      if (real_term != NULL) {
+        AT_markTerm_young(odd_term);
+      }
+  
+!     odd_sym = *((AFun *)(((MachineWord)cur)+4));
+      if (AT_isValidSymbol(odd_sym)) {
+          /*fprintf(stderr,"mark_memory_young: AT_markSymbol_young(%d)\n",odd_sym);*/
+        AT_markSymbol_young(odd_sym);
+***************
+*** 225,235 ****
+    ATerm *start, *stop;
+    ProtEntry *prot;
+  
+- #ifdef AT_64BIT
+-   ATerm oddTerm;
+-   AFun oddSym;
+- #endif
+- 
+  #ifdef WIN32
+  
+    unsigned int r_eax, r_ebx, r_ecx, r_edx, \
+--- 225,230 ----
+***************
+*** 287,293 ****
+    /* Traverse possible register variables */
+    sigsetjmp(env,0);
+  
+!   start = (ATerm *)env;
+    stop  = ((ATerm *)(((char *)env) + sizeof(sigjmp_buf)));
+    mark_memory(start, stop);
+  #endif
+--- 282,288 ----
+    /* Traverse possible register variables */
+    sigsetjmp(env,0);
+  
+!   start = (ATerm *)env; /* !!! illegal aliasing  */
+    stop  = ((ATerm *)(((char *)env) + sizeof(sigjmp_buf)));
+    mark_memory(start, stop);
+  #endif
+***************
+*** 338,348 ****
+    ATerm *start, *stop;
+    ProtEntry *prot;
+  
+- #ifdef AT_64BIT
+-   ATerm oddTerm;
+-   AFun oddSym;
+- #endif
+- 
+  #ifdef WIN32
+  
+    unsigned int r_eax, r_ebx, r_ecx, r_edx, \
+--- 333,338 ----
+***************
+*** 400,406 ****
+      /* Traverse possible register variables */
+    sigsetjmp(env,0);
+  
+!   start = (ATerm *)env;
+    stop  = ((ATerm *)(((char *)env) + sizeof(sigjmp_buf)));
+    mark_memory_young(start, stop);
+  #endif
+--- 390,396 ----
+      /* Traverse possible register variables */
+    sigsetjmp(env,0);
+  
+!   start = (ATerm *)env; /* !!! illegal aliasing  */
+    stop  = ((ATerm *)(((char *)env) + sizeof(sigjmp_buf)));
+    mark_memory_young(start, stop);
+  #endif
+***************
+*** 1047,1053 ****
+        /*fprintf(stderr,"minor_sweep_phase_young: ensure empty freelist[%d]\n",size);*/
+        for(data = at_freelist[size] ; data ; data=data->next) {
+          if(!EQUAL_HEADER(data->header,FREE_HEADER)) {
+!           fprintf(stderr,"data = %x header = %x\n",(unsigned int)data,data->header);
+          }
+          assert(EQUAL_HEADER(data->header,FREE_HEADER)); 
+          assert(ATgetType(data) == AT_FREE);   
+--- 1037,1043 ----
+        /*fprintf(stderr,"minor_sweep_phase_young: ensure empty freelist[%d]\n",size);*/
+        for(data = at_freelist[size] ; data ; data=data->next) {
+          if(!EQUAL_HEADER(data->header,FREE_HEADER)) {
+!           fprintf(stderr,"data = %p header = %x\n",data,(unsigned int) data->header);
+          }
+          assert(EQUAL_HEADER(data->header,FREE_HEADER)); 
+          assert(ATgetType(data) == AT_FREE);   
+diff -rc aterm-2.4.2-orig/aterm/Makefile.am aterm-2.4.2/aterm/Makefile.am
+*** aterm-2.4.2-orig/aterm/Makefile.am	2005-08-03 11:45:19.000000000 +0200
+--- aterm-2.4.2/aterm/Makefile.am	2006-09-22 13:39:07.000000000 +0200
+***************
+*** 37,43 ****
+    aterm2.h \
+    atypes.h \
+    deprecated.h \
+!   encoding.h
+  
+  PRIVATE_INCL = \
+    _afun.h \
+--- 37,44 ----
+    aterm2.h \
+    atypes.h \
+    deprecated.h \
+!   encoding.h \
+!   config.h
+  
+  PRIVATE_INCL = \
+    _afun.h \
+diff -rc aterm-2.4.2-orig/aterm/md5.h aterm-2.4.2/aterm/md5.h
+*** aterm-2.4.2-orig/aterm/md5.h	2003-09-02 15:32:46.000000000 +0200
+--- aterm-2.4.2/aterm/md5.h	2006-09-22 13:39:07.000000000 +0200
+***************
+*** 24,29 ****
+--- 24,31 ----
+  documentation and/or software.
+   */
+  
++ #include <stdint.h>
++ 
+  /* GLOBAL.H - RSAREF types and constants
+   */
+  
+***************
+*** 46,55 ****
+  typedef unsigned char *POINTER;
+  
+  /* UINT2 defines a two byte word */
+! typedef unsigned short int UINT2;
+  
+  /* UINT4 defines a four byte word */
+! typedef unsigned long int UINT4;
+  
+  /* PROTO_LIST is defined depending on how PROTOTYPES is defined above.
+  If using PROTOTYPES, then PROTO_LIST returns the list, otherwise it
+--- 48,57 ----
+  typedef unsigned char *POINTER;
+  
+  /* UINT2 defines a two byte word */
+! typedef uint16_t UINT2;
+  
+  /* UINT4 defines a four byte word */
+! typedef uint32_t UINT4;
+  
+  /* PROTO_LIST is defined depending on how PROTOTYPES is defined above.
+  If using PROTOTYPES, then PROTO_LIST returns the list, otherwise it
+diff -rc aterm-2.4.2-orig/aterm/memory.c aterm-2.4.2/aterm/memory.c
+*** aterm-2.4.2-orig/aterm/memory.c	2005-10-11 13:19:25.000000000 +0200
+--- aterm-2.4.2/aterm/memory.c	2006-09-22 13:39:16.000000000 +0200
+***************
+*** 96,102 ****
+  #define HASHNUMBER4(t) hash_number(t,4)
+  #define HASHINT(val)   (tmp[0]=(MachineWord)(AT_INT<<SHIFT_TYPE),\
+                          tmp[1]=(MachineWord)0,\
+!                         tmp[2]=(MachineWord)val,\
+                          hash_number(tmp,3)) 
+  
+  #else
+--- 96,102 ----
+  #define HASHNUMBER4(t) hash_number(t,4)
+  #define HASHINT(val)   (tmp[0]=(MachineWord)(AT_INT<<SHIFT_TYPE),\
+                          tmp[1]=(MachineWord)0,\
+!                         tmp[2]=(MachineWord)((unsigned int) val),\
+                          hash_number(tmp,3)) 
+  
+  #else
+***************
+*** 127,133 ****
+  		       ((MachineWord*)t)[2]),((MachineWord*)t)[3]))
+  
+  #define HASHINT(val) \
+! FINISH(COMBINE(START( (AT_INT<<SHIFT_TYPE) ), val))
+  
+  
+  #endif /* HASHPEM */
+--- 127,133 ----
+  		       ((MachineWord*)t)[2]),((MachineWord*)t)[3]))
+  
+  #define HASHINT(val) \
+! FINISH(COMBINE(START( (AT_INT<<SHIFT_TYPE) ), (unsigned int) val))
+  
+  
+  #endif /* HASHPEM */
+***************
+*** 708,714 ****
+    at_blocks[size] = newblock;
+    top_at_blocks[size] = newblock->data;
+    assert(at_blocks[size] != NULL);
+!   assert(((int)top_at_blocks[size] % MAX(sizeof(double), sizeof(void *))) == 0);
+    
+      /* [pem: Feb 14 02] TODO: fast allocation */
+    assert(at_freelist[size] == NULL);
+--- 708,714 ----
+    at_blocks[size] = newblock;
+    top_at_blocks[size] = newblock->data;
+    assert(at_blocks[size] != NULL);
+!   assert(((long)top_at_blocks[size] % MAX(sizeof(double), sizeof(void *))) == 0);
+    
+      /* [pem: Feb 14 02] TODO: fast allocation */
+    assert(at_freelist[size] == NULL);
+***************
+*** 1009,1018 ****
+    do {
+      if(!cur) {
+          /*printf("freeterm = %d\n",t);*/
+!       fprintf(stderr,"### cannot find term %x in hashtable at pos %d header = %x\n", (unsigned int)t, hnr, t->header);
+! 
+!       ATabort("### cannot find term %n at %p in hashtable at pos %d"
+! 	      ", header = %d\n", t, t, hnr, t->header);
+      }
+      if (cur == t) {
+        if(prev)
+--- 1009,1016 ----
+    do {
+      if(!cur) {
+          /*printf("freeterm = %d\n",t);*/
+!       ATabort("### cannot find term %p in hashtable at pos %d"
+! 	      ", header = %x\n", t, hnr, t->header);
+      }
+      if (cur == t) {
+        if(prev)
+***************
+*** 1728,1733 ****
+--- 1726,1733 ----
+      hashtable[hnr] = cur;
+    }
+  
++   assert((hnr & table_mask) == (hash_number(cur, TERM_SIZE_INT) & table_mask));
++ 
+    return (ATermInt)cur;  
+  }
+  
+diff -rc aterm-2.4.2-orig/aterm.m4 aterm-2.4.2/aterm.m4
+*** aterm-2.4.2-orig/aterm.m4	2005-08-03 11:45:19.000000000 +0200
+--- aterm-2.4.2/aterm.m4	2006-09-22 13:39:07.000000000 +0200
+***************
+*** 8,15 ****
+      [AS_HELP_STRING([--with-sharing],[create libraries that do term sharing @<:@yes@:>@])],
+      [if test "$withval" = "no"; then
+         AC_MSG_RESULT([no])
+!        AC_DEFINE([NO_SHARING])
+!        AC_DEFINE([WITH_STATS])
+       else
+         if test "$withval" != "yes"; then
+           AC_MSG_RESULT([unknown value specified for --with-sharing.])
+--- 8,15 ----
+      [AS_HELP_STRING([--with-sharing],[create libraries that do term sharing @<:@yes@:>@])],
+      [if test "$withval" = "no"; then
+         AC_MSG_RESULT([no])
+!        AC_DEFINE([NO_SHARING], [], [Whether terms are shared.])
+!        AC_DEFINE([WITH_STATS], [], [Whether to keep statistics.])
+       else
+         if test "$withval" != "yes"; then
+           AC_MSG_RESULT([unknown value specified for --with-sharing.])
+***************
+*** 73,78 ****
+--- 73,102 ----
+    AC_SUBST([OPTIMIZECFLAGS])
+  ])
+  
++ # ATERM_64_BIT
++ # ------------
++ # Enable 64-bit mode if pointers are 8 bytes large.
++ AC_DEFUN([ATERM_64_BIT], [
++   AC_CHECK_SIZEOF(void *)
++   AC_CHECK_SIZEOF(int)
++   AC_CHECK_SIZEOF(long)
++ 
++   AC_MSG_CHECKING([what kind of platform this is])
++ 
++   AC_SUBST([AT_64BIT], [0])
++   if test "$ac_cv_sizeof_void_p" = "8" -a "$ac_cv_sizeof_int" = "4" -a "$ac_cv_sizeof_long" = "8"; then
++     AC_MSG_RESULT([LP64])
++     AC_SUBST([AT_64BIT], [1])
++   elif test "$ac_cv_sizeof_void_p" = "8" -a "$ac_cv_sizeof_int" = "8" -a "$ac_cv_sizeof_long" = "8"; then
++     AC_MSG_RESULT([ILP64 - warning, untested])
++     AC_SUBST([AT_64BIT], [1])
++   elif test "$ac_cv_sizeof_void_p" = "4" -a "$ac_cv_sizeof_int" = "4" -a "$ac_cv_sizeof_long" = "4"; then
++     AC_MSG_RESULT([32 bits])
++   else
++     AC_MSG_RESULT([something weird - warning, untested])
++   fi
++ ])
++ 
+  # XT_SVN_REVISION
+  # ---------------
+  AC_DEFUN([XT_SVN_REVISION],
+diff -rc aterm-2.4.2-orig/configure.ac aterm-2.4.2/configure.ac
+*** aterm-2.4.2-orig/configure.ac	2005-08-03 11:45:19.000000000 +0200
+--- aterm-2.4.2/configure.ac	2006-09-22 13:39:07.000000000 +0200
+***************
+*** 30,35 ****
+--- 30,38 ----
+  # Add a configuration option to allow users to control sharing.
+  ATERM_WITH_SHARING
+  
++ # Enable 64-bit mode if pointers are 8 bytes large.
++ ATERM_64_BIT
++ 
+  CURDATE=`date`
+  AC_SUBST([CURDATE])
+  
+***************
+*** 45,49 ****
+--- 48,53 ----
+    doc/spec/Makefile
+    aterm.spec
+    aterm.pc
++   aterm/config.h
+  ])
+  AC_OUTPUT
+diff -rc aterm-2.4.2-orig/utils/dicttoc.c aterm-2.4.2/utils/dicttoc.c
+*** aterm-2.4.2-orig/utils/dicttoc.c	2003-10-07 13:57:40.000000000 +0200
+--- aterm-2.4.2/utils/dicttoc.c	2006-09-22 13:39:07.000000000 +0200
+***************
+*** 69,74 ****
+--- 69,75 ----
+    fprintf(file, "#ifndef __%s_H\n", code_prefix);
+    fprintf(file, "#define __%s_H\n\n", code_prefix);
+    fprintf(file, "#include <aterm2.h>\n\n");
++   fprintf(file, "#include <assert.h>\n\n");
+  
+    while (!ATisEmpty(afuns)) {
+      ATerm afun, alias, pair = ATgetFirst(afuns);
+***************
+*** 244,251 ****
+    ATfprintf(file, "{\n");
+    ATfprintf(file, "  ATermList afuns, terms;\n\n");
+  
+!   ATfprintf(file, "  _%s = ATreadFromBinaryString(_%s_baf, _%s_LEN);\n\n", 
+  	    code_prefix, code_prefix, code_prefix);
+    ATfprintf(file, "  ATprotect(&_%s);\n\n", code_prefix);
+  
+    ATfprintf(file, "  afuns = (ATermList)ATelementAt((ATermList)_%s, 0);\n\n", code_prefix);
+--- 245,253 ----
+    ATfprintf(file, "{\n");
+    ATfprintf(file, "  ATermList afuns, terms;\n\n");
+  
+!   ATfprintf(file, "  _%s = ATreadFromBinaryString(_%s_baf, _%s_LEN);\n", 
+  	    code_prefix, code_prefix, code_prefix);
++   ATfprintf(file, "  assert(_%s);\n\n", code_prefix);
+    ATfprintf(file, "  ATprotect(&_%s);\n\n", code_prefix);
+  
+    ATfprintf(file, "  afuns = (ATermList)ATelementAt((ATermList)_%s, 0);\n\n", code_prefix);

externals/aterm-aliasing.patch

@@ -0,0 +1,224 @@
+diff -rc aterm-1142707243.10633/aterm/aterm.c aterm/aterm/aterm.c
+*** aterm-1142707243.10633/aterm/aterm.c	2006-02-08 11:35:28.000000000 +0100
+--- aterm/aterm/aterm.c	2006-04-25 17:10:52.000000000 +0200
+***************
+*** 193,198 ****
+--- 193,199 ----
+    /* that have char == 2 bytes, and sizeof(header_type) == 2 */
+    assert(sizeof(header_type) == sizeof(ATerm *));
+    assert(sizeof(header_type) >= 4);
++   assert(sizeof(ATerm) == sizeof(MachineWord));
+  
+    /*}}}  */
+    /*{{{  Initialize buffer */
+diff -rc aterm-1142707243.10633/aterm/memory.c aterm/aterm/memory.c
+*** aterm-1142707243.10633/aterm/memory.c	2006-03-09 15:02:56.000000000 +0100
+--- aterm/aterm/memory.c	2006-04-25 18:22:00.000000000 +0200
+***************
+*** 119,130 ****
+                          hash_number(tmp,3)) 
+  */
+  
+  #define HASHNUMBER3(t)\
+! FINISH(COMBINE(START(((MachineWord*)t)[0]), ((MachineWord*)t)[2]))
+  
+  #define HASHNUMBER4(t)\
+! FINISH(COMBINE(COMBINE(START(((MachineWord*)t)[0]), \
+! 		       ((MachineWord*)t)[2]),((MachineWord*)t)[3]))
+  
+  #define HASHINT(val) \
+  FINISH(COMBINE(START( (AT_INT<<SHIFT_TYPE) ), val))
+--- 119,171 ----
+                          hash_number(tmp,3)) 
+  */
+  
++ /* The ATerm library use some heavy aliasing.  For instance, the
++    various ATermXXX structures are referenced through MachineWord
++    arrays.  This is not generally allowed by the C standard --- see
++    C99, section 6.5, clause 7.  In particular, this means that you
++    cannot assign something through an ATermXXX pointer, e.g.,
++ 
++      protoAppl->header = header;
++ 
++    and then read it through a MachineWord*, e.g.,
++ 
++      hnr = hash_number((ATerm) protoAppl, 2);
++ 
++    (hash_number walks over the term by casting it to a MachineWord*).
++ 
++    However, the same clause of the C standard also specifies that you
++    *can* read the memory location through a union type that contains
++    both the original type (e.g. ATermAppl) and the type used to read
++    the memory location (e.g. MachineWord).  That's what we do
++    below: we have a union of all the types that occur in the various
++    ATerm types.  We then read the "w" element of the union.  The
++    compiler is not allowed to assume absence of aliasing with the
++    other types in the union.
++ 
++    A better solution would be to hash the term through a character
++    pointer (since *any* memory location can be legally read as a
++    character), but I'm too lazy right now.  Performance might also
++    suffer if we do that. */
++ 
++ typedef union 
++ {
++     MachineWord w;
++     header_type header;
++     ATerm term;
++     ATermList list;
++     int i;
++     double d;
++     void* p;
++ } Aliaser;
++ 
++ #define GET_WORD(t, n) (((Aliaser*) (((MachineWord*) t) + n))->w)
++ 
+  #define HASHNUMBER3(t)\
+! FINISH(COMBINE(START(GET_WORD(t, 0)), GET_WORD(t, 2)))
+  
+  #define HASHNUMBER4(t)\
+! FINISH(COMBINE(COMBINE(START(GET_WORD(t, 0)), \
+! 		       GET_WORD(t, 2)), GET_WORD(t, 3)))
+  
+  #define HASHINT(val) \
+  FINISH(COMBINE(START( (AT_INT<<SHIFT_TYPE) ), val))
+***************
+*** 132,144 ****
+  
+  #endif /* HASHPEM */
+  
+! #define PROTO_APPL_ARGS ((ATerm *) (protoTerm + ARG_OFFSET))
+  
+  #define SET_PROTO_APPL_ARG(i, a) \
+!   (PROTO_APPL_ARGS[(i)] = (a))
+  
+  #define GET_PROTO_APPL_ARG(i) \
+!   (PROTO_APPL_ARGS[(i)])
+  
+  #define CHECK_TERM(t) \
+    assert((t) != NULL \
+--- 173,185 ----
+  
+  #endif /* HASHPEM */
+  
+! #define PROTO_APPL_ARGS (protoTerm + ARG_OFFSET)
+  
+  #define SET_PROTO_APPL_ARG(i, a) \
+!   (PROTO_APPL_ARGS[(i)] = (MachineWord) (a))
+  
+  #define GET_PROTO_APPL_ARG(i) \
+!   ((ATerm) PROTO_APPL_ARGS[(i)])
+  
+  #define CHECK_TERM(t) \
+    assert((t) != NULL \
+***************
+*** 323,336 ****
+  #else
+  static HashNumber hash_number(ATerm t, int size)
+  {
+-   MachineWord *words = (MachineWord *) t;
+    int i;
+    HashNumber hnr;
+  
+!   hnr = START(HIDE_AGE_MARK(words[0]));
+    
+    for (i=2; i<size; i++) {
+!     hnr = COMBINE(hnr, words[i]);
+    }
+  
+    return FINISH(hnr);
+--- 364,376 ----
+  #else
+  static HashNumber hash_number(ATerm t, int size)
+  {
+    int i;
+    HashNumber hnr;
+  
+!   hnr = START(HIDE_AGE_MARK(GET_WORD(t, 0)));
+    
+    for (i=2; i<size; i++) {
+!     hnr = COMBINE(hnr, GET_WORD(t, i));
+    }
+  
+    return FINISH(hnr);
+***************
+*** 338,351 ****
+  
+  static HashNumber hash_number_anno(ATerm t, int size, ATerm anno)
+  {
+-   MachineWord *words = (MachineWord *) t;
+    int i;
+    HashNumber hnr;
+  
+!   hnr = START(HIDE_AGE_MARK(words[0]));
+    
+    for (i=2; i<size; i++) {
+!     hnr = COMBINE(hnr, words[i]);
+    }
+    hnr = COMBINE(hnr, (MachineWord)anno);
+  
+--- 378,390 ----
+  
+  static HashNumber hash_number_anno(ATerm t, int size, ATerm anno)
+  {
+    int i;
+    HashNumber hnr;
+  
+!   hnr = START(HIDE_AGE_MARK(GET_WORD(t, 0)));
+    
+    for (i=2; i<size; i++) {
+!     hnr = COMBINE(hnr, GET_WORD(t, i));
+    }
+    hnr = COMBINE(hnr, (MachineWord)anno);
+  
+***************
+*** 1639,1645 ****
+    protoAppl->header = header;
+    CHECK_HEADER(protoAppl->header);
+  
+!   if (args != PROTO_APPL_ARGS) {
+      for (i=0; i<arity; i++) {
+        CHECK_TERM(args[i]);
+        SET_PROTO_APPL_ARG(i, args[i]);
+--- 1678,1684 ----
+    protoAppl->header = header;
+    CHECK_HEADER(protoAppl->header);
+  
+!   if (args != (ATerm *) PROTO_APPL_ARGS) {
+      for (i=0; i<arity; i++) {
+        CHECK_TERM(args[i]);
+        SET_PROTO_APPL_ARG(i, args[i]);
+***************
+*** 1680,1686 ****
+      hashtable[hnr] = cur;
+    }
+  
+!   if (args != PROTO_APPL_ARGS) {
+      for (i=0; i<arity; i++) {
+        protected_buffer[i] = NULL;
+      }
+--- 1719,1725 ----
+      hashtable[hnr] = cur;
+    }
+  
+!   if (args != (ATerm *) PROTO_APPL_ARGS) {
+      for (i=0; i<arity; i++) {
+        protected_buffer[i] = NULL;
+      }
+***************
+*** 2144,2150 ****
+    }
+    SET_PROTO_APPL_ARG(n, arg);
+  
+!   result = ATmakeApplArray(sym, PROTO_APPL_ARGS);
+    annos = AT_getAnnotations((ATerm)appl);
+    if (annos != NULL) {
+      result = (ATermAppl)AT_setAnnotations((ATerm)result, annos);
+--- 2183,2189 ----
+    }
+    SET_PROTO_APPL_ARG(n, arg);
+  
+!   result = ATmakeApplArray(sym, (ATerm *) PROTO_APPL_ARGS);
+    annos = AT_getAnnotations((ATerm)appl);
+    if (annos != NULL) {
+      result = (ATermAppl)AT_setAnnotations((ATerm)result, annos);

externals/bdb-cygwin.patch

@@ -0,0 +1,21 @@
+diff -rc db-4.4.20.NC-old/os/os_flock.c db-4.4.20.NC/os/os_flock.c
+*** db-4.4.20.NC-old/os/os_flock.c	Mon Jun 20 16:59:01 2005
+--- db-4.4.20.NC/os/os_flock.c	Wed Jun  7 17:01:49 2006
+***************
+*** 36,41 ****
+--- 36,50 ----
+  
+  	DB_ASSERT(F_ISSET(fhp, DB_FH_OPENED) && fhp->fd != -1);
+  
++ #ifdef __CYGWIN__
++ 	/*
++ 	 * Windows file locking interferes with read/write operations, so we
++ 	 * map the ranges to an area past the end of the file.
++ 	 */
++ 	DB_ASSERT(offset < (off_t) 1 << 62);
++ 	offset += (off_t) 1 << 62;
++ #endif
++ 
+  #ifdef HAVE_FCNTL
+  	fl.l_start = offset;
+  	fl.l_len = 1;

make/examples/aterm/aterm/default.nix

@@ -19,11 +19,7 @@ rec {
     ./version.c
   ];
 
-  compile = fn: compileC {
-    main = fn;
-    localIncludes = "auto";
-    forSharedLib = sharedLib;
-  };
+  compile = main: compileC {inherit main sharedLib;};
 
   libATerm = makeLibrary {
     libraryName = "ATerm";

make/examples/aterm/test/default.nix

@@ -1,18 +1,15 @@
+with (import ../../../lib);
+
 let {
-
-  inherit (import ../../../lib) compileC link;
-
   inherit (import ../aterm {}) libATerm;
 
-  compile = fn: compileC {
-    main = fn;
-    localIncludes = "auto";
-    cFlags = "-I../aterm";
+  compileTest = main: link {
+    objects = [(compileC {inherit main; localIncludePath = [ ../aterm ];})];
+    libraries = libATerm;
   };
 
-  fib = link {objects = compile ./fib.c; libraries = libATerm;};
-
-  primes = link {objects = compile ./primes.c; libraries = libATerm;};
-  
-  body = [fib primes];
+  body = [
+    (compileTest ./fib.c)
+    (compileTest ./primes.c)
+  ];
 }

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

@@ -1,11 +1,13 @@
-let {
+with import ../../lib;
 
-  inherit (import ../../lib) compileC findIncludes link;
+let {
 
   hello = link {programName = "hello"; objects = compileC {
     main = ./foo/hello.c;
     localIncludes = "auto";
   };};
 
+#  body = findIncludes {main = ./foo/hello.c;};
+
   body = [hello];
 }

make/lib/default.nix

@@ -8,46 +8,55 @@ rec {
   stdenv = pkgs.stdenv;
   
 
-  compileC = {main, localIncludes ? [], cFlags ? "", forSharedLib ? false}:
+  compileC =
+  { main
+  , localIncludes ? "auto"
+  , localIncludePath ? []
+  , cFlags ? ""
+  , sharedLib ? false
+  }:
   stdenv.mkDerivation {
     name = "compile-c";
     builder = ./compile-c.sh;
+    
     localIncludes =
       if localIncludes == "auto" then
-        import (findIncludes {
-          main = toString main;
-          hack = __currentTime;
-          inherit cFlags;
-        })
+        dependencyClosure {
+          scanner = main:
+            import (findIncludes {
+              inherit main;
+            });
+          searchPath = localIncludePath;
+          startSet = [main];
+        }
       else
         localIncludes;
+        
     inherit main;
+    
     cFlags = [
       cFlags
-      (if forSharedLib then ["-fpic"] else [])
+      (if sharedLib then ["-fpic"] else [])
+      (map (p: "-I" + (relativise (dirOf main) p)) localIncludePath)
     ];
   };
 
-  /*
-  runCommand = {command}: {
-    name = "run-command";
-    builder = ./run-command.sh;
-    inherit command;
-  };
-  */
-
-  findIncludes = {main, hack, cFlags ? ""}: stdenv.mkDerivation {
-    name = "find-includes";
-    builder = ./find-includes.sh;
-    inherit main hack cFlags;
-  };
   
+  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 {
@@ -56,4 +65,5 @@ rec {
     inherit objects libraryName sharedLib;
   };
 
+  
 }

make/lib/find-includes.pl

@@ -0,0 +1,21 @@
+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/find-includes.sh

@@ -1,20 +0,0 @@
-. $stdenv/setup
-
-echo "finding includes of \`$(basename $main)'..."
-
-makefile=$NIX_BUILD_TOP/makefile
-
-mainDir=$(dirname $main)
-(cd $mainDir && gcc $cFlags -MM $(basename $main) -MF $makefile) || false
-
-echo "[" >$out
-
-while read line; do
-    line=$(echo "$line" | sed 's/.*://')
-    for i in $line; do
-        fullPath=$(readlink -f $mainDir/$i)
-        echo "  [ $fullPath \"$i\" ]" >>$out
-    done
-done < $makefile
-
-echo "]" >>$out

misc/emacs/Makefile.am

@@ -2,4 +2,4 @@ EXTRA_DIST = nix-mode.el
 
 install-data-local:
 	$(INSTALL) -d $(DESTDIR)$(datadir)/emacs/site-lisp
-	$(INSTALL_DATA) nix-mode.el $(DESTDIR)$(datadir)/emacs/site-lisp
+	$(INSTALL_DATA) $(srcdir)/nix-mode.el $(DESTDIR)$(datadir)/emacs/site-lisp

misc/emacs/nix-mode.el

@@ -66,8 +66,8 @@ The hook `nix-mode-hook' is run when Nix mode is started.
 
 
 (defvar nix-keywords
-  '("\\<if\\>" "\\<then\\>" "\\<else\\>" "\\<assert\\>"
-    "\\<let\\>" "\\<rec\\>" "\\<inherit\\>"
+  '("\\<if\\>" "\\<then\\>" "\\<else\\>" "\\<assert\\>" "\\<with\\>"
+    "\\<let\\>" "\\<in\\>" "\\<rec\\>" "\\<inherit\\>"
     ("\\<true\\>" . font-lock-builtin-face)
     ("\\<false\\>" . font-lock-builtin-face)
     ("\\<null\\>" . font-lock-builtin-face)

nix.conf.example

@@ -11,7 +11,7 @@
 # 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
+#gc-keep-outputs = false
 
 
 ### Option `gc-keep-derivations'
@@ -26,7 +26,26 @@ gc-keep-outputs = false
 # 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
+#gc-keep-derivations = true
+
+
+### Option `gc-reserved-space'
+#
+# This option specifies how much space should be reserved in normal
+# use so that the garbage collector can run succesfully.  Since the
+# garbage collector must perform Berkeley DB transactions, it needs
+# some disk space for itself.  However, when the disk is full, this
+# space is not available, so the collector would not be able to run
+# precisely when it is most needed.
+#
+# For this reason, when Nix is run, it allocates a file
+# /nix/var/nix/db/reserved of the size specified by this option.  When
+# the garbage collector is run, this file is deleted before the
+# Berkeley DB environment is opened.  This should give it enough room
+# to proceed.
+#
+# The default is "1048576" (1 MiB).
+#gc-reserved-space = 1048576
 
 
 ### Option `env-keep-derivations'
@@ -46,4 +65,65 @@ gc-keep-derivations = true
 # 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
+#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-allow-root'
+#
+# This option controls Nix's behaviour when it is invoked under the
+# `root' user (or setuid-root).  If `true' (default), builds are
+# performed under the `root' user.  If `false', builds are performed
+# under one of the users listed in the `build-users' option (see
+# below).
+#build-allow-root = true
+
+
+### Option `build-users'
+#
+# This option is only applicable if `build-allow-root' is `false' and
+# Nix is invoked under the `root' user (or setuid-root).  It contains
+# a list of user names under which Nix can execute builds.  Builds
+# cannot be performed by root since that would allow users to take
+# over the system 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.
+#
+# Thus this list should contain a number of `special' user accounts
+# created specifically for Nix, e.g., `nix-builder-1',
+# `nix-builder-2', and so on.  The more users the better, since at
+# most a number of builds equal to the number of build users can be
+# started.
+#
+# Example:
+#   build-users = nix-builder-1 nix-builder-2 nix-builder-3
+#build-users =
+
+
+### Option `system'
+#
+# This option specifies the canonical Nix system name of the current
+# installation, such as `i686-linux' or `powerpc-darwin'.  Nix can
+# only build derivations whose `system' 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 `powerpc-darwin' and `i686-darwin'.
+#
+# It defaults to the canonical Nix system name detected by `configure'
+# at build time.
+#
+# Example:
+#   system = i686-darwin
+#system =

nix.spec.in

@@ -19,6 +19,7 @@ BuildRoot: %{_tmppath}/%{name}-%{version}-buildroot
 %define _prefix /nix
 Prefix: %{_prefix}
 Requires: /usr/bin/perl
+Requires: curl
 
 # Hack to make that shitty RPM scanning hack shut up.
 Provides: perl(readmanifest)
@@ -48,6 +49,7 @@ make check
 %install
 rm -rf $RPM_BUILD_ROOT
 make DESTDIR=$RPM_BUILD_ROOT install
+rm $RPM_BUILD_ROOT/%{_prefix}/etc/nix/nix.conf
 strip $RPM_BUILD_ROOT/%{_prefix}/bin/* || true
 
 %clean
@@ -66,7 +68,9 @@ fi
 %files
 #%defattr(-,root,root)
 %{_prefix}/bin
+%{_prefix}/lib
 %{_prefix}/libexec
+%{_prefix}/include
 %{_prefix}/var
 %{_prefix}/share
 %{_prefix}/man

scripts/Makefile.am

@@ -1,17 +1,20 @@
 bin_SCRIPTS = nix-collect-garbage \
   nix-pull nix-push nix-prefetch-url \
-  nix-install-package nix-channel nix-build
+  nix-install-package nix-channel nix-build \
+  nix-pack-closure nix-unpack-closure
 
-noinst_SCRIPTS = nix-profile.sh generate-patches.pl
+noinst_SCRIPTS = nix-profile.sh generate-patches.pl find-runtime-roots.pl
 
-nix-pull nix-push: readmanifest.pm download-using-manifests.pl
+nix-pull nix-push: readmanifest.pm readconfig.pm download-using-manifests.pl
 
-install-exec-local: readmanifest.pm download-using-manifests.pl
+install-exec-local: readmanifest.pm download-using-manifests.pl find-runtime-roots.pl
 	$(INSTALL) -d $(DESTDIR)$(sysconfdir)/profile.d
 	$(INSTALL_PROGRAM) nix-profile.sh $(DESTDIR)$(sysconfdir)/profile.d/nix.sh
 	$(INSTALL) -d $(DESTDIR)$(libexecdir)/nix
 	$(INSTALL_DATA) readmanifest.pm $(DESTDIR)$(libexecdir)/nix 
+	$(INSTALL_DATA) readconfig.pm $(DESTDIR)$(libexecdir)/nix 
 	$(INSTALL_PROGRAM) download-using-manifests.pl $(DESTDIR)$(libexecdir)/nix 
+	$(INSTALL_PROGRAM) find-runtime-roots.pl $(DESTDIR)$(libexecdir)/nix 
 	$(INSTALL) -d $(DESTDIR)$(sysconfdir)/nix
 
 include ../substitute.mk
@@ -21,6 +24,9 @@ EXTRA_DIST = nix-collect-garbage.in \
   nix-prefetch-url.in nix-install-package.in \
   nix-channel.in \
   readmanifest.pm.in \
+  readconfig.pm.in \
   nix-build.in \
   download-using-manifests.pl.in \
-  generate-patches.pl.in
+  generate-patches.pl.in \
+  nix-pack-closure.in nix-unpack-closure.in \
+  find-runtime-roots.pl.in

scripts/download-using-manifests.pl.in

@@ -2,19 +2,33 @@
 
 use strict;
 use readmanifest;
+use POSIX qw(strftime);
+use File::Temp qw(tempdir);
 
 my $manifestDir = "@localstatedir@/nix/manifests";
 my $logFile = "@localstatedir@/log/nix/downloads";
 
 open LOGFILE, ">>$logFile" or die "cannot open log file $logFile";
 
+delete $ENV{"NIX_ROOT"};
+
+# Create a temporary directory.
+my $tmpDir = tempdir("nix-download.XXXXXX", CLEANUP => 1, TMPDIR => 1)
+    or die "cannot create a temporary directory";
+
+chdir $tmpDir or die "cannot change to `$tmpDir': $!";
+
+my $tmpNar = "$tmpDir/nar";
+my $tmpNar2 = "$tmpDir/nar2";
+
+END { unlink $tmpNar; unlink $tmpNar2; rmdir $tmpDir; }
+
 
 # Check the arguments.
 die unless scalar @ARGV == 1;
 my $targetPath = $ARGV[0];
 
-my $date = `date` or die;
-chomp $date;
+my $date = strftime ("%F %H:%M:%S UTC", gmtime (time));
 print LOGFILE "$$ get $targetPath $date\n";
 
 print "\n*** Trying to download/patch `$targetPath'\n";
@@ -76,8 +90,7 @@ addToQueue $targetPath;
 
 sub isValidPath {
     my $p = shift;
-    system "@bindir@/nix-store --check-validity '$p' 2> /dev/null";
-    return $? == 0;
+    return system("@bindir@/nix-store --check-validity '$p' 2> /dev/null") == 0;
 }
 
 sub parseHash {
@@ -217,8 +230,8 @@ while (scalar @path > 0) {
             # as a base to one or more patches.  So turn the base path
             # into a NAR archive, to which we can apply the patch.
             print "  packing base path...\n";
-            system "@bindir@/nix-store --dump $v > /tmp/nar";
-            die "cannot dump `$v'" if ($? != 0);
+            system("@bindir@/nix-store --dump $v > $tmpNar") == 0
+                or die "cannot dump `$v'";
         }
     }
 
@@ -235,18 +248,18 @@ while (scalar @path > 0) {
         # Apply the patch to the NAR archive produced in step 1 (for
         # the already present path) or a later step (for patch sequences).
         print "  applying patch...\n";
-        system "@libexecdir@/bspatch /tmp/nar /tmp/nar2 $patchPath";
-        die "cannot apply patch `$patchPath' to /tmp/nar" if ($? != 0);
+        system("@libexecdir@/bspatch $tmpNar $tmpNar2 $patchPath") == 0
+            or die "cannot apply patch `$patchPath' to $tmpNar";
 
         if ($curStep < $maxStep) {
             # The archive will be used as the base of the next patch.
-            rename "/tmp/nar2", "/tmp/nar" or die "cannot rename NAR archive: $!";
+            rename "$tmpNar2", "$tmpNar" or die "cannot rename NAR archive: $!";
         } else {
             # This was the last patch.  Unpack the final NAR archive
             # into the target path.
             print "  unpacking patched archive...\n";
-            system "@bindir@/nix-store --restore $v < /tmp/nar2";
-            die "cannot unpack /tmp/nar2 into `$v'" if ($? != 0);
+            system("@bindir@/nix-store --restore $v < $tmpNar2") == 0
+                or die "cannot unpack $tmpNar2 into `$v'";
         }
     }
 
@@ -262,12 +275,13 @@ while (scalar @path > 0) {
 
         if ($curStep < $maxStep) {
             # The archive will be used a base to a patch.
-            system "@bunzip2@ < '$narFilePath' > /tmp/nar";
+            system("@bunzip2@ < '$narFilePath' > $tmpNar") == 0
+                or die "cannot unpack `$narFilePath' into `$v'";
         } else {
             # Unpack the archive into the target path.
             print "  unpacking archive...\n";
-            system "@bunzip2@ < '$narFilePath' | @bindir@/nix-store --restore '$v'";
-            die "cannot unpack `$narFilePath' into `$v'" if ($? != 0);
+            system("@bunzip2@ < '$narFilePath' | @bindir@/nix-store --restore '$v'") == 0
+                or die "cannot unpack `$narFilePath' into `$v'";
         }
     }
 

scripts/find-runtime-roots.pl.in

@@ -0,0 +1,58 @@
+#! @perl@ -w
+
+use strict;
+
+my $procDir = "/proc";
+
+
+sub readProc {
+    return unless -d $procDir;
+
+    opendir DIR, $procDir or return;
+    
+    foreach my $name (readdir DIR) {
+        next unless $name =~ /^\d+$/;
+
+        my $process = "$procDir/$name";
+
+        #print STDERR "=== $process\n";
+        
+        my $target;
+        print "$target\n" if $target = readlink "$process/exe";
+        print "$target\n" if $target = readlink "$process/cwd";
+
+        if (opendir FDS, "$process/fd") {
+            foreach my $name (readdir FDS) {
+                $target = readlink "$process/fd/$name";
+                print "$target\n" if $target && substr($target, 0, 1) eq "/";
+            }
+            closedir FDS;
+        }
+
+        if (open MAP, "<$process/maps") {
+            while (<MAP>) {
+                next unless /^ \s* \S+ \s+ \S+ \s+ \S+ \s+ \S+ \s+ \S+ \s+ (\/\S+) \s* $/x;
+                print "$1\n";
+            }
+            close MAP;
+        }
+    }
+
+    closedir DIR;
+}
+
+
+sub lsof {
+    return unless open LSOF, "lsof -n -w -F n 2> /dev/null |";
+
+    while (<LSOF>) {
+        next unless /^n (\/ .*)$/x;
+        print $1, "\n";
+    }
+
+    close LSOF;
+}
+
+
+readProc;
+lsof;

scripts/generate-patches.pl.in

@@ -1,7 +1,7 @@
 #! @perl@ -w -I@libexecdir@/nix
 
 use strict;
-use POSIX qw(tmpnam);
+use File::Temp qw(tempdir);
 use readmanifest;
 
 die unless scalar @ARGV == 5;
@@ -14,13 +14,12 @@ my $patchesURL = $ARGV[2];
 my $srcDir = $ARGV[3];
 my $dstDir = $ARGV[4];
 
-my $tmpdir;
-do { $tmpdir = tmpnam(); }
-until mkdir $tmpdir, 0777;
+my $tmpDir = tempdir("nix-generate-patches.XXXXXX", CLEANUP => 1, TMPDIR => 1)
+    or die "cannot create a temporary directory";
 
-print "TEMP = $tmpdir\n";
+print "TEMP = $tmpDir\n";
 
-#END { rmdir $tmpdir; }
+#END { rmdir $tmpDir; }
 
 my %srcNarFiles;
 my %srcPatches;
@@ -140,19 +139,19 @@ sub computeUses {
 
 #    print "  DERIVER $deriver\n";
 
-    # Optimisation: build the referers graph from the references
+    # Optimisation: build the referrers graph from the references
     # graph.
-    my %referers;
+    my %referrers;
     foreach my $q (keys %{$narFiles}) {
         my @refs = split " ", @{$$narFiles{$q}}[0]->{references};
         foreach my $r (@refs) {
-            $referers{$r} = [] unless defined $referers{$r};
-            push @{$referers{$r}}, $q;
+            $referrers{$r} = [] unless defined $referrers{$r};
+            push @{$referrers{$r}}, $q;
         }
     }
 
     # Determine the shortest path from $deriver to all other reachable
-    # paths in the `referers' graph.
+    # paths in the `referrers' graph.
 
     my %dist;
     $dist{$deriver} = 0;
@@ -164,7 +163,7 @@ sub computeUses {
         my $p = $queue[$pos];
         $pos++;
 
-        foreach my $q (@{$referers{$p}}) {
+        foreach my $q (@{$referrers{$p}}) {
             if (!defined $dist{$q}) {
                 $dist{$q} = $dist{$p} + 1;
 #                print "    $q $dist{$q}\n";
@@ -277,26 +276,38 @@ foreach my $p (keys %dstOutPaths) {
         
         my $srcNarBz2 = getNarBz2 \%srcNarFiles, $closest;
         my $dstNarBz2 = getNarBz2 \%dstNarFiles, $p;
-        
-        system("@bunzip2@ < $srcNarBz2 > $tmpdir/A") == 0
+
+        my $maxNarSize = 150 * 1024 * 1024;
+
+        system("@bunzip2@ < $srcNarBz2 > $tmpDir/A") == 0
             or die "cannot unpack $srcNarBz2";
 
-        system("@bunzip2@ < $dstNarBz2 > $tmpdir/B") == 0
+        if ((stat "$tmpDir/A")[7] >= $maxNarSize) {
+            print "    skipping, source is too large\n";
+            next;
+        }
+        
+        system("@bunzip2@ < $dstNarBz2 > $tmpDir/B") == 0
             or die "cannot unpack $dstNarBz2";
 
-        system("@libexecdir@/bsdiff $tmpdir/A $tmpdir/B $tmpdir/DIFF") == 0
+        if ((stat "$tmpDir/B")[7] >= $maxNarSize) {
+            print "    skipping, destination is too large\n";
+            next;
+        }
+        
+        system("@libexecdir@/bsdiff $tmpDir/A $tmpDir/B $tmpDir/DIFF") == 0
             or die "cannot compute binary diff";
 
-        my $baseHash = `@bindir@/nix-hash --flat --type $hashAlgo --base32 $tmpdir/A` or die;
+        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;
+        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;
+        my $narDiffHash = `@bindir@/nix-hash --flat --type $hashAlgo --base32 $tmpDir/DIFF` or die;
         chomp $narDiffHash;
 
-        my $narDiffSize = (stat "$tmpdir/DIFF")[7];
+        my $narDiffSize = (stat "$tmpDir/DIFF")[7];
         my $dstNarBz2Size = (stat $dstNarBz2)[7];
 
         if ($narDiffSize >= $dstNarBz2Size) {
@@ -315,7 +326,7 @@ foreach my $p (keys %dstOutPaths) {
 
         else {
 
-            system("cp '$tmpdir/DIFF' '$patchesDir/$finalName.tmp'") == 0
+            system("cp '$tmpDir/DIFF' '$patchesDir/$finalName.tmp'") == 0
                 or die "cannot copy diff";
             
             rename("$patchesDir/$finalName.tmp", "$patchesDir/$finalName")

scripts/maintenance/gc-commands

@@ -0,0 +1,2 @@
+./gc-releases.pl /data/webserver/dist/*/*/MANIFEST > dead
+cat dead | xargs mv --target-directory=/data/webserver/trash/

scripts/maintenance/gc-releases.pl

@@ -1,28 +1,8 @@
-#! /usr/bin/perl -w
+#! /usr/bin/perl -w -I. -I..
 
 use strict;
 use readmanifest;
-
-
-# Read the archive directories.
-my @archives = ();
-my %archives;
-
-sub readDir {
-    my $dir = shift;
-    opendir(DIR, "$dir") or die "cannot open `$dir': $!";
-    my @as = readdir DIR;
-    foreach my $archive (@as) {
-        push @archives, $archive;
-        $archives{$archive} = "$dir/$archive";
-    }
-    closedir DIR;
-}
-
-readDir "/mnt/scratchy/eelco/public_html/nix-cache";
-readDir "/mnt/scratchy/eelco/public_html/patches";
-
-print STDERR scalar @archives, "\n";
+use readcache;
 
 
 # Read the manifests.
@@ -48,8 +28,8 @@ foreach my $narFile (keys %narFiles) {
         die unless defined $basename;
 #        print $basename, "\n";
         $usedFiles{$basename} = 1;
-        die "missing archive `$basename'"
-            unless defined $archives{$basename};
+        print STDERR "missing archive `$basename'\n"
+            unless defined $readcache::archives{$basename};
     }
 }
 
@@ -61,15 +41,15 @@ foreach my $patch (keys %patches) {
 #        print $basename, "\n";
         $usedFiles{$basename} = 1;
         die "missing archive `$basename'"
-            unless defined $archives{$basename};
+            unless defined $readcache::archives{$basename};
     }
 }
 
 
 # Print out the dead archives.
-foreach my $archive (@archives) {
+foreach my $archive (keys %readcache::archives) {
     next if $archive eq "." || $archive eq "..";
     if (!defined $usedFiles{$archive}) {
-        print $archives{$archive}, "\n";
+        print $readcache::archives{$archive}, "\n";
     }
 }

scripts/maintenance/readcache.pm

@@ -0,0 +1,21 @@
+package readcache;
+use strict;
+
+# Read the archive directories.
+our %archives;
+
+sub readDir {
+    my $dir = shift;
+    opendir(DIR, "$dir") or die "cannot open `$dir': $!";
+    my @as = readdir DIR;
+    foreach my $archive (@as) {
+        $archives{$archive} = "$dir/$archive";
+    }
+    closedir DIR;
+}
+
+readDir "/data/webserver/dist/nix-cache";
+readDir "/data/webserver/dist/test";
+readDir "/data/webserver/dist/patches";
+
+print STDERR scalar (keys %archives), "\n";

scripts/maintenance/shrink-manifest.pl

@@ -0,0 +1,77 @@
+#! /usr/bin/perl -w -I. -I..
+
+use strict;
+use readmanifest;
+use readcache;
+
+
+my %allNarFiles;
+my %allPatches;
+my %allSuccessors;
+
+foreach my $manifest (glob "/data/webserver/dist/*/*/MANIFEST") {
+    print STDERR "loading $manifest\n";
+    readManifest($manifest, \%allNarFiles, \%allPatches, \%allSuccessors, 1);
+}
+
+
+
+foreach my $manifest (@ARGV) {
+
+    print STDERR "shrinking manifest $manifest...\n";
+
+    my %narFiles;
+    my %patches;
+    my %successors;
+
+    if (readManifest($manifest, \%narFiles, \%patches, \%successors, 1) < 3) {
+        print STDERR "manifest `$manifest' is too old (i.e., for Nix <= 0.7)\n";
+	next;
+    }
+
+    my %done;
+
+    sub traverse {
+	my $p = shift;
+	my $prefix = shift;
+	print "$prefix$p\n";
+
+	my $reachesNAR = 0;
+
+	foreach my $patch (@{$patches{$p}}) {
+	    next if defined $done{$patch->{url}};
+	    $done{$patch->{url}} = 1;
+	    $reachesNAR = 1 if traverse ($patch->{basePath}, $prefix . "  ");
+	}
+
+	$reachesNAR = 1 if defined $allNarFiles{$p};
+
+	print "  $prefix$reachesNAR\n";
+	return $reachesNAR;
+    }
+
+#    foreach my $p (keys %narFiles) {
+#	traverse ($p, "");
+#    }
+
+    my %newPatches;
+
+    foreach my $p (keys %patches) {
+	my $patchList = $patches{$p};
+	my @newList;
+	foreach my $patch (@{$patchList}) {
+	    if (! defined $allNarFiles{$patch->{basePath}} || 
+		! defined $allNarFiles{$p} ) 
+	    {
+#		print "REMOVING PATCH ", $patch->{basePath}, " -> ", $p, "\n";
+	    } else {
+#		print "KEEPING PATCH ", $patch->{basePath}, " -> ", $p, "\n";
+		push @newList, $patch;
+	    }
+	}
+	$newPatches{$p} = \@newList;
+    }
+
+    writeManifest ($manifest, \%narFiles, \%newPatches);
+}
+

scripts/nix-build.in

@@ -1,59 +1,132 @@
-#! @shell@ -e
+#! @perl@ -w -I@libexecdir@/nix
 
-nixExpr=$1
-
-if test -z "$nixExpr"; then
-    echo "syntax: $0 NIX-EXPR..." >&2
-    exit 1
-fi
-
-extraArgs=
-addDrvLink=0
-addOutLink=1
+use strict;
 
 
-trap 'rm -f ./.nix-build-tmp-*' EXIT
+my $addDrvLink = 0;
+my $addOutLink = 1;
+
+my $outLink;
+my $drvLink;
+
+my @instArgs = ();
+my @buildArgs = ();
+my @exprs = ();
 
 
-# Process the arguments.
-for i in "$@"; do
-    case "$i" in
+END {
+    foreach my $fn (glob ".nix-build-tmp-*") {
+        unlink $fn;
+    }
+}
+
+sub intHandler {
+    exit 1;
+}
+
+$SIG{'INT'} = 'intHandler';
+
+
+for (my $n = 0; $n < scalar @ARGV; $n++) {
+    my $arg = $ARGV[$n];
+
+    if ($arg eq "--help") {
+        print STDERR <<EOF;
+Usage: nix-build [OPTION]... [FILE]...
+
+`nix-build' builds the given Nix expressions (which
+default to ./default.nix if none are given).  A symlink called
+`result' is placed in the current directory.
+
+Flags:
+  --add-drv-link: create a symlink `derivation' to the store derivation
+  --drv-link NAME: create symlink NAME instead of `derivation'
+  --no-out-link: do not create the `result' symlink
+  --out-link / -o NAME: create symlink NAME instead of `result'
+  --attr ATTR: select a specific attribution from the Nix expression
+
+Any additional flags are passed to `nix-store'.
+EOF
+        exit 0;
+        # '` hack
+    }
+
+    elsif ($arg eq "--add-drv-link") {
+        $addDrvLink = 1;
+    }
+
+    elsif ($arg eq "--no-out-link" or $arg eq "--no-link") {
+        $addOutLink = 1;
+    }
+
+    elsif ($arg eq "--drv-link") {
+        $n++;
+        die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
+        $drvLink = $ARGV[$n];
+    }
+
+    elsif ($arg eq "--out-link" or $arg eq "-o") {
+        $n++;
+        die "$0: `$arg' requires an argument\n" unless $n < scalar @ARGV;
+        $outLink = $ARGV[$n];
+    }
+
+    elsif ($arg eq "--attr" or $arg eq "-A") {
+        $n++;
+        die "$0: `--attr' requires an argument\n" unless $n < scalar @ARGV;
+        push @instArgs, ("--attr", $ARGV[$n]);
+    }
+
+    elsif ($arg eq "--arg") {
+        die "$0: `--arg' requires two arguments\n" unless $n + 2 < scalar @ARGV;
+        push @instArgs, ("--arg", $ARGV[$n + 1], $ARGV[$n + 2]);
+        $n += 2;
+    }
+
+    elsif (substr($arg, 0, 1) eq "-") {
+        push @buildArgs, $arg;
+    }
+
+    else {
+        push @exprs, $arg;
+    }
+}
+
+@exprs = ("./default.nix") if scalar @exprs == 0;
+
+
+if (!defined $drvLink) {
+    $drvLink = "derivation";
+    $drvLink = ".nix-build-tmp-" . $drvLink if !$addDrvLink;
+}
+
+if (!defined $outLink) {
+    $outLink = "result";
+    $outLink = ".nix-build-tmp-" . $outLink if !$addOutLink;
+}
+
+
+foreach my $expr (@exprs) {
+
+    # Instantiate.
+    my @drvPaths;
+    # !!! would prefer the perl 5.8.0 pipe open feature here.
+    my $pid = open(DRVPATHS, "-|") || exec "@bindir@/nix-instantiate", "--add-root", $drvLink, "--indirect", @instArgs, $expr;
+    while (<DRVPATHS>) {chomp; push @drvPaths, $_;}
+    close DRVPATHS or exit 1;
+
+    foreach my $drvPath (@drvPaths) {
+        my $target = readlink $drvPath;
+        print STDERR "store derivation is $target\n";
+    }
+
+    # Build.
+    my $outPaths = `@bindir@/nix-store --add-root "$outLink" --indirect -rv @buildArgs @drvPaths`;
+    my @outPaths = split ' ', $outPaths;
     
-        --add-drv-link)
-            addDrvLink=1
-            ;;
-            
-        --no-link)
-            addOutLink=0
-            ;;
-            
-        -*)
-            extraArgs="$extraArgs $i"
-            ;;
-            
-        *)
-            # Instantiate the Nix expression.
-            prefix=
-            if test "$addDrvLink" = 0; then prefix=.nix-build-tmp-; fi
-            storeExprs=$(@bindir@/nix-instantiate \
-                --add-root ./${prefix}derivation --indirect \
-                "$i")
-                
-            for j in $storeExprs; do
-                echo "store expression is $(readlink "$j")" >&2
-            done
+    foreach my $outPath (@outPaths) {
+        my $target = readlink $outPath;
+        print "$target\n";
+    }
 
-            # Build the resulting store derivation.
-            prefix=
-            if test "$addOutLink" = 0; then prefix=.nix-build-tmp-; fi
-            outPaths=$(@bindir@/nix-store \
-                --add-root ./${prefix}result --indirect \
-                -rv $extraArgs $storeExprs)
-                
-            for j in $outPaths; do
-                echo "$(readlink "$j")"
-            done
-            
-            ;;
-    esac
-done
+}

scripts/nix-channel.in

@@ -4,6 +4,9 @@ use strict;
 
 my $rootsDir = "@localstatedir@/nix/gcroots/channels";
 
+my $stateDir = $ENV{"NIX_STATE_DIR"};
+$stateDir = "@localstatedir@/nix" unless defined $stateDir;
+
 
 # Figure out the name of the `.nix-channels' file to use.
 my $home = $ENV{"HOME"};
@@ -20,6 +23,7 @@ sub readChannels {
     open CHANNELS, "<$channelsList" or die "cannot open `$channelsList': $!";
     while (<CHANNELS>) {
         chomp;
+        next if /^\s*\#/;
         push @channels, $_;
     }
     close CHANNELS;
@@ -67,14 +71,19 @@ sub update {
     readChannels;
 
     # Get rid of all the old substitutes.
-    system "@bindir@/nix-store --clear-substitutes";
-    die "cannot clear substitutes" if ($? != 0);
+    system("@bindir@/nix-store", "--clear-substitutes") == 0
+        or die "cannot clear substitutes";
+
+    # Remove all the old manifests.
+    for my $manifest (glob "$stateDir/manifests/*.nixmanifest") {
+        unlink $manifest or die "cannot remove `$manifest': $!";
+    }
 
     # Pull cache manifests.
     foreach my $url (@channels) {
         print "pulling cache manifest from `$url'\n";
-        system "@bindir@/nix-pull '$url'/MANIFEST";
-        die "cannot pull cache manifest from `$url'" if ($? != 0);
+        system("@bindir@/nix-pull", "--skip-wrong-store", "$url/MANIFEST") == 0
+            or die "cannot pull cache manifest from `$url'";
     }
 
     # Create a Nix expression that fetches and unpacks the channel Nix
@@ -107,15 +116,15 @@ sub update {
     chomp $storeExpr;
 
     # Build the resulting derivation.
-    my $outPath = `nix-store --add-root '$rootFile' -r '$storeExpr'`
+    my $outPath = `@bindir@/nix-store --add-root '$rootFile' -r '$storeExpr'`
         or die "cannot realise store expression";
     chomp $outPath;
 
     unlink "$rootFile.tmp";
 
     # Make it the default Nix expression for `nix-env'.
-    system "@bindir@/nix-env --import '$outPath'";
-    die "cannot pull set default Nix expression to `$outPath'" if ($? != 0);
+    system("@bindir@/nix-env", "--import", "$outPath") == 0
+         or die "cannot pull set default Nix expression to `$outPath'";
 }
 
 

scripts/nix-collect-garbage.in

@@ -1,2 +1,42 @@
-#! @shell@ -e
-exec @bindir@/nix-store --gc "$@"
+#! @perl@ -w
+
+use strict;
+
+my $profilesDir = "@localstatedir@/nix/profiles";
+
+
+# Process the command line arguments.
+my @args = ();
+my $removeOld = 0;
+
+for my $arg (@ARGV) {
+    if ($arg eq "--delete-old" || $arg eq "-d") {
+        $removeOld = 1;
+    } else {
+        push @args, $arg;
+    }
+}
+
+
+# If `-d' was specified, remove all old generations of all profiles.
+# Of course, this makes rollbacks to before this point in time
+# impossible.
+if ($removeOld) {
+
+    opendir DIR, $profilesDir or die;
+
+    foreach my $name (sort (readdir DIR)) {
+        $name = $profilesDir . "/" . $name;
+        if (-l $name && (readlink($name) =~ /link/)) {
+            print STDERR "removing old generations of profile $name\n";
+            system("@bindir@/nix-env", "-p", $name, "--delete-generations", "old");
+        }
+    }
+    
+    closedir DIR or die;
+    
+}
+
+
+# Run the actual garbage collector.
+exec "@bindir@/nix-store", "--gc", @args;

scripts/nix-install-package.in

@@ -1,28 +1,107 @@
 #! @perl@ -w
 
 use strict;
-use POSIX qw(tmpnam);
+use File::Temp qw(tempdir);
 
-my $pkgFile = $ARGV[0];
-die unless defined $pkgFile;
+
+sub usageError {
+    print STDERR <<EOF;
+Usage: nix-install-package (FILE | --url URL)
+
+Install a Nix Package (.nixpkg) either directly from FILE or by
+downloading it from URL.
+
+Flags:
+  --profile / -p LINK: install into the specified profile
+  --non-interactive: don't run inside a new terminal XXX
+EOF
+    ; # '
+    exit 1;
+}
+
+
+# Parse the command line arguments.
+my @args = @ARGV;
+usageError if scalar @args == 0;
+
+my $source;
+my $fromURL = 0;
+my @extraNixEnvArgs = ();
+my $interactive = 1;
+
+while (scalar @args) {
+    my $arg = shift @args;
+    if ($arg eq "--help") {
+        usageError;
+    }
+    elsif ($arg eq "--url") {
+        $fromURL = 1;
+    }
+    elsif ($arg eq "--profile" || $arg eq "-p") {
+        my $profile = shift @args;
+        usageError if !defined $profile;
+        push @extraNixEnvArgs, "-p", $profile;
+    }
+    elsif ($arg eq "--non-interactive") {
+        $interactive = 0;
+    }
+    else {
+        $source = $arg;
+    }
+}
+
+usageError unless defined $source;
 
 
 # Re-execute in a terminal, if necessary, so that if we're executed
 # from a web browser, the user gets to see us.
-if (!defined $ENV{"NIX_HAVE_TERMINAL"}) {
+if ($interactive && !defined $ENV{"NIX_HAVE_TERMINAL"}) {
     $ENV{"NIX_HAVE_TERMINAL"} = "1";
     $ENV{"LD_LIBRARY_PATH"} = "";
-    exec("xterm", "-e", "@shell@", "-c", "@bindir@/nix-install-package '$pkgFile' || read");
+    foreach my $term ("xterm", "konsole", "gnome-terminal", "xterm") {
+        exec($term, "-e", "@bindir@/nix-install-package", @ARGV);
+    }
     die "cannot execute `xterm'";
 }
 
 
+my $tmpDir = tempdir("nix-install-package.XXXXXX", CLEANUP => 1, TMPDIR => 1)
+    or die "cannot create a temporary directory";
+
+
+sub barf {
+    my $msg = shift;
+    print "$msg\n";
+    <STDIN> if $interactive;
+    exit 1;
+}
+
+
+# Download the package description, if necessary.
+my $pkgFile = $source;
+if ($fromURL) {
+    $pkgFile = "$tmpDir/tmp.nixpkg";
+    system("@curl@", "--silent", $source, "-o", $pkgFile) == 0
+        or barf "curl failed: $?";
+}
+
+
 # Read and parse the package file.
-open PKGFILE, "<$pkgFile" or die "cannot open `$pkgFile': $!";
+open PKGFILE, "<$pkgFile" or barf "cannot open `$pkgFile': $!";
 my $contents = <PKGFILE>;
 close PKGFILE;
 
-$contents =~ /^\s*(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)/ or die "invalid package contents";
+my $urlRE = "(?: [a-zA-Z][a-zA-Z0-9\+\-\.]*\:[a-zA-Z0-9\%\/\?\:\@\&\=\+\$\,\-\_\.\!\~\*\']+ )";
+my $nameRE = "(?: [A-Za-z0-9\+\-\.\_\?\=]+ )"; # see checkStoreName()
+my $systemRE = "(?: [A-Za-z0-9\+\-\_]+ )";
+my $pathRE = "(?: \/ [\/A-Za-z0-9\+\-\.\_\?\=]* )";
+
+# Note: $pathRE doesn't check that whether we're looking at a valid
+# store path.  We'll let nix-env do that.
+
+$contents =~
+    / ^ \s* (\S+) \s+ ($urlRE) \s+ ($nameRE) \s+ ($systemRE) \s+ ($pathRE) \s+ ($pathRE) /x
+    or barf "invalid package contents";
 my $version = $1;
 my $manifestURL = $2;
 my $drvName = $3;
@@ -30,22 +109,29 @@ my $system = $4;
 my $drvPath = $5;
 my $outPath = $6;
 
-die "invalid package version `$version'" unless $version eq "NIXPKG1";
+barf "invalid package version `$version'" unless $version eq "NIXPKG1";
 
 
-# Ask confirmation.
-print "Do you want to install `$drvName' (Y/N)? ";
-my $reply = <STDIN>;
-chomp $reply;
-exit if $reply ne "y" && $reply ne "Y";
+if ($interactive) {
+    # Ask confirmation.
+    print "Do you want to install `$drvName' (Y/N)? ";
+    my $reply = <STDIN>;
+    chomp $reply;
+    exit if $reply ne "y" && $reply ne "Y";
+}
+
 
 print "\nPulling manifests...\n";
-system "@bindir@/nix-pull '$manifestURL'";
-die if $? != 0;
+system("@bindir@/nix-pull", $manifestURL) == 0
+    or barf "nix-pull failed: $?";
+
 
 print "\nInstalling package...\n";
-system "@bindir@/nix-env -i '$outPath'";
-die if $? != 0;
+system("@bindir@/nix-env", "--install", $outPath, "--force-name", $drvName, @extraNixEnvArgs) == 0
+    or barf "nix-env failed: $?";
 
-print "\nInstallation succeeded! Press Enter to continue.\n";
-<STDIN>;
+
+if ($interactive) {
+    print "\nInstallation succeeded! Press Enter to continue.\n";
+    <STDIN>;
+}

scripts/nix-pack-closure.in

@@ -0,0 +1,65 @@
+#! @perl@ -w
+
+# This tool computes the closure of a path (using "nix-store --query
+# --requisites") and puts the contents of each path in the closure in
+# a big NAR archive that can be installed on another Nix installation
+# using "nix-unpack-closure".
+
+# TODO: make this program "streamy", i.e., don't use a temporary
+# directory.
+
+use strict;
+use File::Temp qw(tempdir);
+
+my $binDir = $ENV{"NIX_BIN_DIR"};
+$binDir = "@bindir@" unless defined $binDir;
+
+my $tmpDir = tempdir("nix-pack-closure.XXXXXX", CLEANUP => 1, TMPDIR => 1)
+    or die "cannot create a temporary directory";
+
+mkdir "$tmpDir/contents", 0777 or die;
+mkdir "$tmpDir/references", 0777 or die;
+mkdir "$tmpDir/derivers", 0777 or die;
+
+
+
+my %storePaths;
+
+
+while (@ARGV) {
+    my $storePath = shift @ARGV;
+
+    # Get the closure of this path.
+    my $pid = open(READ,
+        "$binDir/nix-store --query --requisites '$storePath'|") or die;
+    
+    while (<READ>) {
+        chomp;
+        die "bad: $_" unless /^\//;
+        $storePaths{$_} = "";
+    }
+
+    close READ or die "nix-store failed: $?";
+}
+
+
+foreach my $storePath (sort(keys %storePaths)) {
+    print STDERR "packing `$storePath'...\n";
+
+    $storePath =~ /\/([^\/]+)$/;
+    my $name = $1;
+
+    system("$binDir/nix-store --dump '$storePath' > $tmpDir/contents/$name") == 0
+        or die "nix-store --dump failed on `$storePath': $?";
+
+    system("$binDir/nix-store --query --references '$storePath' > $tmpDir/references/$name") == 0
+        or die "nix-store --query --references failed on `$storePath': $?";
+
+    system("$binDir/nix-store --query --deriver '$storePath' > $tmpDir/derivers/$name") == 0
+        or die "nix-store --query --deriver failed on `$storePath': $?";
+}
+
+
+# Write a NAR archive of everything to standard output.
+system("nix-store --dump '$tmpDir'") == 0
+    or die "nix-store --dump failed";

scripts/nix-prefetch-url.in

@@ -3,6 +3,12 @@
 url=$1
 expHash=$2
 
+# to prevent doing more than 1 chroot
+unset NIX_ROOT
+
+# needed to make it work on NixOS
+export PATH=$PATH:@coreutils@
+
 hashType=$NIX_HASH_ALGO
 if test -z "$hashType"; then
     hashType=md5

scripts/nix-profile.sh.in

@@ -2,9 +2,9 @@ if test -n "$HOME"; then
     NIX_LINK="$HOME/.nix-profile"
 
     if ! test -L "$NIX_LINK"; then
-        echo "creating $NIX_LINK"
+        echo "creating $NIX_LINK" >&2
         _NIX_DEF_LINK=@localstatedir@/nix/profiles/default
-        ln -s "$_NIX_DEF_LINK" "$NIX_LINK"
+        @coreutils@/ln -s "$_NIX_DEF_LINK" "$NIX_LINK"
     fi
 
     export PATH=$NIX_LINK/bin:@prefix@/bin:$PATH

scripts/nix-pull.in

@@ -1,17 +1,13 @@
 #! @perl@ -w -I@libexecdir@/nix
 
 use strict;
-use IPC::Open2;
-use POSIX qw(tmpnam);
+use File::Temp qw(tempdir);
 use readmanifest;
 
-my $tmpdir;
-do { $tmpdir = tmpnam(); }
-until mkdir $tmpdir, 0777;
+my $tmpDir = tempdir("nix-pull.XXXXXX", CLEANUP => 1, TMPDIR => 1)
+    or die "cannot create a temporary directory";
 
-my $manifest = "$tmpdir/manifest";
-
-END { unlink $manifest; rmdir $tmpdir; }
+my $manifest = "$tmpDir/manifest";
 
 my $binDir = $ENV{"NIX_BIN_DIR"};
 $binDir = "@bindir@" unless defined $binDir;
@@ -22,16 +18,21 @@ $libexecDir = "@libexecdir@" unless defined $libexecDir;
 my $stateDir = $ENV{"NIX_STATE_DIR"};
 $stateDir = "@localstatedir@/nix" unless defined $stateDir;
 
+my $storeDir = $ENV{"NIX_STORE_DIR"};
+$storeDir = "@storedir@" unless defined $storeDir;
+
 
 # Prevent access problems in shared-stored installations.
 umask 0022;
 
 
-# Obtain URLs either from the command line or from a configuration file.
+# Process the URLs specified on the command line.
 my %narFiles;
 my %patches;
 my %successors;
 
+my $skipWrongStore = 0;
+
 sub processURL {
     my $url = shift;
 
@@ -46,6 +47,15 @@ sub processURL {
         die "manifest `$url' is too old (i.e., for Nix <= 0.7)\n";
     }
 
+    if ($skipWrongStore) {
+        foreach my $path (keys %narFiles) {
+            if (substr($path, 0, length($storeDir) + 1) ne "$storeDir/") {
+                print STDERR "warning: manifest `$url' assumes a Nix store at a different location than $storeDir, skipping...\n";
+                exit 0;
+            }
+        }
+    }
+
     my $baseName = "unnamed";
     if ($url =~ /\/([^\/]+)\/[^\/]+$/) { # get the forelast component
         $baseName = $1;
@@ -57,13 +67,17 @@ sub processURL {
     
     my $finalPath = "$stateDir/manifests/$baseName-$hash.nixmanifest";
     
-    system("mv -f '$manifest' '$finalPath'") == 0
+    system ("@coreutils@/mv", "-f", "$manifest", "$finalPath") == 0
         or die "cannot move `$manifest' to `$finalPath";
 }
 
 while (@ARGV) {
     my $url = shift @ARGV;
-    processURL $url;
+    if ($url eq "--skip-wrong-store") {
+        $skipWrongStore = 1;
+    } else {
+        processURL $url;
+    }
 }
 
 
@@ -74,11 +88,9 @@ print "$size store paths in manifest\n";
 # Register all substitutes.
 print STDERR "registering substitutes...\n";
 
-my $pid = open2(\*READ, \*WRITE, "$binDir/nix-store --register-substitutes")
+my $pid = open(WRITE, "|$binDir/nix-store --register-substitutes")
     or die "cannot run nix-store";
 
-close READ;
-
 foreach my $storePath (keys %narFiles) {
     my $narFileList = $narFiles{$storePath};
     foreach my $narFile (@{$narFileList}) {
@@ -95,7 +107,4 @@ foreach my $storePath (keys %narFiles) {
     }
 }
 
-close WRITE;
-
-waitpid $pid, 0;
-$? == 0 or die "nix-store failed";
+close WRITE or die "nix-store failed: $?";

scripts/nix-push.in

@@ -1,20 +1,16 @@
 #! @perl@ -w -I@libexecdir@/nix
 
 use strict;
-use IPC::Open2;
-use POSIX qw(tmpnam);
+use File::Temp qw(tempdir);
 use readmanifest;
 
 my $hashAlgo = "sha256";
 
-my $tmpdir;
-do { $tmpdir = tmpnam(); }
-until mkdir $tmpdir, 0777;
+my $tmpDir = tempdir("nix-push.XXXXXX", CLEANUP => 1, TMPDIR => 1)
+    or die "cannot create a temporary directory";
 
-my $nixfile = "$tmpdir/create-nars.nix";
-my $manifest = "$tmpdir/MANIFEST";
-
-END { unlink $manifest; unlink $nixfile; rmdir $tmpdir; }
+my $nixExpr = "$tmpDir/create-nars.nix";
+my $manifest = "$tmpDir/MANIFEST";
 
 my $curl = "@curl@ --fail --silent";
 my $extraCurlFlags = ${ENV{'CURL_FLAGS'}};
@@ -32,20 +28,42 @@ my $localCopy;
 my $localArchivesDir;
 my $localManifestFile;
 
+my $targetArchivesUrl;
+
 my $archivesPutURL;
 my $archivesGetURL;
 my $manifestPutURL;
 
+sub showSyntax {
+    print STDERR <<EOF
+Usage: nix-push --copy ARCHIVES_DIR MANIFEST_FILE PATHS...
+   or: nix-push ARCHIVES_PUT_URL ARCHIVES_GET_URL MANIFEST_PUT_URL PATHS...
+
+`nix-push' copies or uploads the closure of PATHS to the given
+destination.
+EOF
+    ; # `
+    exit 1;
+}
+
+showSyntax if scalar @ARGV < 1;
+
 if ($ARGV[0] eq "--copy") {
-    die "syntax: nix-push --copy ARCHIVES_DIR MANIFEST_FILE PATHS...\n" if scalar @ARGV < 3;
+    showSyntax if scalar @ARGV < 3;
     $localCopy = 1;
     shift @ARGV;
     $localArchivesDir = shift @ARGV;
     $localManifestFile = shift @ARGV;
+    if ($ARGV[0] eq "--target") {
+       shift @ARGV;
+       $targetArchivesUrl = shift @ARGV;
+    }
+    else {
+       $targetArchivesUrl = "file://$localArchivesDir";
+    }
 }
 else {
-    die "syntax: nix-push ARCHIVES_PUT_URL ARCHIVES_GET_URL " .
-        "MANIFEST_PUT_URL PATHS...\n" if scalar @ARGV < 3;
+    showSyntax if scalar @ARGV < 3;
     $localCopy = 0;
     $archivesPutURL = shift @ARGV;
     $archivesGetURL = shift @ARGV;
@@ -62,20 +80,17 @@ foreach my $path (@ARGV) {
 
     # Get all paths referenced by the normalisation of the given 
     # Nix expression.
-    my $pid = open2(\*READ, \*WRITE,
+    my $pid = open(READ,
         "$binDir/nix-store --query --requisites --force-realise " .
-        "--include-outputs '$path'") or die;
-    close WRITE;
+        "--include-outputs '$path'|") or die;
     
     while (<READ>) {
         chomp;
         die "bad: $_" unless /^\//;
         $storePaths{$_} = "";
     }
-    close READ;
-    
-    waitpid $pid, 0;
-    $? == 0 or die "nix-store failed";
+
+    close READ or die "nix-store failed: $?";
 }
 
 my @storePaths = keys %storePaths;
@@ -83,16 +98,16 @@ my @storePaths = keys %storePaths;
 
 # For each path, create a Nix expression that turns the path into
 # a Nix archive.
-open NIX, ">$nixfile";
+open NIX, ">$nixExpr";
 print NIX "[";
 
 foreach my $storePath (@storePaths) {
-    die unless ($storePath =~ /\/[0-9a-z]{32}.*$/);
+    die unless ($storePath =~ /\/[0-9a-z]{32}[^\"\\\$]*$/);
 
     # Construct a Nix expression that creates a Nix archive.
     my $nixexpr = 
         "((import $dataDir/nix/corepkgs/nar/nar.nix) " .
-        "{path = \"$storePath\"; system = \"@system@\"; hashAlgo = \"$hashAlgo\";}) ";
+        "{storePath = builtins.toPath \"$storePath\"; system = \"@system@\"; hashAlgo = \"$hashAlgo\";}) ";
     
     print NIX $nixexpr;
 }
@@ -104,18 +119,14 @@ close NIX;
 # Instantiate store expressions from the Nix expression.
 my @storeExprs;
 print STDERR "instantiating store expressions...\n";
-my $pid = open2(\*READ, \*WRITE, "$binDir/nix-instantiate $nixfile")
+my $pid = open(READ, "$binDir/nix-instantiate $nixExpr|")
     or die "cannot run nix-instantiate";
-close WRITE;
 while (<READ>) {
     chomp;
     die unless /^\//;
     push @storeExprs, $_;
 }
-close READ;
-
-waitpid $pid, 0;
-$? == 0 or die "nix-instantiate failed";
+close READ or die "nix-instantiate failed: $?";
 
 
 # Realise the store expressions.
@@ -130,18 +141,19 @@ while (scalar @tmp > 0) {
     my @tmp2 = @tmp[0..$n - 1];
     @tmp = @tmp[$n..scalar @tmp - 1];
 
-    my $pid = open2(\*READ, \*WRITE, "$binDir/nix-store --realise @tmp2")
+    # Note: we disable build hooks because of the impure path
+    # reference (see above).  Even if that is fixed, using a hook
+    # probably wouldn't make that much sense; pumping lots of data
+    # around just to compress them won't gain that much.
+    $ENV{"NIX_BUILD_HOOK"} = "";
+    my $pid = open(READ, "$binDir/nix-store --realise @tmp2|")
         or die "cannot run nix-store";
-    close WRITE;
     while (<READ>) {
         chomp;
         die unless (/^\//);
         push @narPaths, "$_";
     }
-    close READ;
-
-    waitpid $pid, 0;
-    $? == 0 or die "nix-store failed";
+    close READ or die "nix-store failed: $?";
 }
 
 
@@ -191,7 +203,7 @@ for (my $n = 0; $n < scalar @storePaths; $n++) {
 
     my $url;
     if ($localCopy) {
-        $url = "file://$localArchivesDir/$narName";
+        $url = "$targetArchivesUrl/$narName";
     } else {
         $url = "$archivesGetURL/$narName";
     }
@@ -212,7 +224,7 @@ writeManifest $manifest, \%narFiles, \%patches;
 sub copyFile {
     my $src = shift;
     my $dst = shift;
-    system("cp '$src' '$dst.tmp'") == 0 or die "cannot copy file";
+    system("@coreutils@/cp", $src, "$dst.tmp") == 0 or die "cannot copy file";
     rename("$dst.tmp", "$dst") or die "cannot rename file";
 }
 

scripts/nix-unpack-closure.in

@@ -0,0 +1,79 @@
+#! @perl@ -w
+
+# This tool unpacks the closures created by "nix-pack-closure" and
+# adds them to the Nix store.
+
+# TODO: make this program "streamy", i.e., don't use a temporary
+# directory.
+
+use strict;
+use File::Temp qw(tempdir);
+
+my $binDir = $ENV{"NIX_BIN_DIR"};
+$binDir = "@bindir@" unless defined $binDir;
+
+my $tmpDir = tempdir("nix-unpack-closure.XXXXXX", CLEANUP => 1, TMPDIR => 1)
+    or die "cannot create a temporary directory";
+
+
+# Unpack the NAR archive on standard input.
+system("nix-store --restore '$tmpDir/unpacked'") == 0
+    or die "nix-store --restore failed";
+
+
+open VALID, ">$tmpDir/validity" or die;
+
+
+# For each path in the closure that is not yet valid, add it to the
+# store.  TODO: use proper locking.  Or even better, let nix-store do
+# this.
+opendir(DIR, "$tmpDir/unpacked/contents") or die "cannot open directory: $!";
+
+foreach my $name (sort(readdir DIR)) {
+    next if $name eq "." or $name eq "..";
+
+    my $storePath = "@storedir@/$name"; # !!!
+
+    # !!! this really isn't a good validity check!
+    system "$binDir/nix-store --check-validity '$storePath' 2> /dev/null";
+    if ($? != 0) {
+        print STDERR "unpacking `$storePath'...\n";
+
+        # !!! race
+        system("@coreutils@/rm -rf '$storePath'") == 0
+            or die "cannot remove `$storePath': $?";
+
+        system("$binDir/nix-store --restore '$storePath' < '$tmpDir/unpacked/contents/$name'") == 0
+            or die "nix-store --dump failed on `$storePath': $?";
+        
+        print VALID "$storePath\n";
+
+        open DRV, "<$tmpDir/unpacked/derivers/$name" or die;
+        my $deriver = <DRV>;
+        chomp $deriver;
+        $deriver = "" if $deriver eq "unknown-deriver";
+        close DRV;
+
+        my @refs;
+        open REFS, "<$tmpDir/unpacked/references/$name" or die;
+        while (<REFS>) {
+            chomp;
+            push @refs, $_;
+        }
+        close REFS;
+
+        print VALID "$deriver\n";
+        
+        print VALID (scalar @refs), "\n";
+        foreach my $ref (@refs) {
+            print VALID "$ref\n";
+        }
+    }
+}
+
+closedir(DIR) or die;
+
+
+# Register the invalid paths as valid.
+system("nix-store --register-validity <'$tmpDir/validity'") == 0
+    or die "nix-store --register-validity failed";

scripts/optimise-store.pl

@@ -1,69 +1,91 @@
 #! /usr/bin/perl -w
 
 use strict;
+use File::Basename;
 
-{ my $ofh = select STDOUT;
-  $| = 1;
-  select $ofh;
-}
 
-#my @paths = ("/nix/store/caef3a49150506d233f474322a824e50-glibc-2.3.3", "/nix/store/a8a9d585d1ad4b1bc911be7743b3b996-glibc-2.3.3");
 my @paths = ("/nix/store");
 
-my $tmpfile = "/tmp/nix-optimise-hash-list";
-#my $tmpfile = "/data/nix-optimise-hash-list";
 
-system("find @paths -type f -print0 | xargs -0 md5sum -- > $tmpfile") == 0
+print "hashing...\n";
+
+my $hashList = "/tmp/nix-optimise-hash-list";
+
+system("find @paths -type f -print0 | xargs -0 md5sum -- > $hashList") == 0
     or die "cannot hash store files";
 
-system("sort $tmpfile > $tmpfile.sorted") == 0
+
+print "sorting by hash...\n";
+
+system("sort $hashList > $hashList.sorted") == 0
     or die "cannot sort list";
 
-open LIST, "<$tmpfile.sorted" or die;
+
+sub atomicLink {
+    my $target = shift;
+    my $new = shift;
+    my $tmpNew = "${new}_optimise.$$";
+
+    # Make the directory writable temporarily.
+    my $dir = dirname $new;
+    my @st = stat $dir or die;
+
+    chmod ($st[2] | 0200, $dir) or die "cannot make `$dir' writable: $!";
+    
+    link $target, $tmpNew or die "cannot create hard link `$tmpNew': $!";
+
+    rename $tmpNew, $new or die "cannot rename `$tmpNew' to `$new': $!";
+
+    chmod ($st[2], $dir) or die "cannot restore permission on `$dir': $!";
+    utime ($st[8], $st[9], $dir) or die "cannot restore timestamp on `$dir': $!";
+}
+
+
+print "hard-linking...\n";
+
+open LIST, "<$hashList.sorted" or die;
 
 my $prevFile;
 my $prevHash;
+my $prevInode;
+my $prevExec;
 
 my $totalSpace = 0;
 my $savedSpace = 0;
 
-my $files = 0;
-
 while (<LIST>) {
-#    print "D";
     /^([0-9a-f]*)\s+(.*)$/ or die;
     my $curFile = $2;
     my $curHash = $1;
 
-#    print "A";
-    my $fileSize = (stat $curFile)[7];
-#    print "B";
-#    my $fileSize = 1;
+    my @st = stat $curFile or die;
+    next if ($st[2] & 0222) != 0; # skip writable files
+
+    my $fileSize = $st[7];
     $totalSpace += $fileSize;
+    my $isExec = ($st[2] & 0111) == 0111;
 
-    if (defined $prevHash && $curHash eq $prevHash) {
+    if (defined $prevHash && $curHash eq $prevHash
+        && $prevExec == $isExec)
+    {
         
-#        print "$curFile = $prevFile\n";
-
-        $savedSpace += $fileSize;
+        if ($st[1] != $prevInode) {
+            print "$curFile = $prevFile\n";
+            atomicLink $prevFile, $curFile;
+            $savedSpace += $fileSize;
+        }
         
     } else {
         $prevFile = $curFile;
         $prevHash = $curHash;
+        $prevInode = $st[1];
+        $prevExec = ($st[2] & 0111) == 0111;
     }
-
-    print "." if ($files++ % 100 == 0);
-    #print ".";
-
-#    print "C";
 }
 
-print "\n";
-
 print "total space = $totalSpace\n";
 print "saved space = $savedSpace\n";
 my $savings = ($savedSpace / $totalSpace) * 100.0;
 print "savings = $savings %\n";
 
-
 close LIST;

scripts/prebuilts.conf

@@ -1,2 +0,0 @@
-# A list of URLs from where `nix-pull' obtain Nix archives if
-# no URL is specified on the command line.

scripts/readconfig.pm.in

@@ -0,0 +1,17 @@
+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/readmanifest.pm.in

@@ -172,7 +172,7 @@ sub writeManifest
     print MANIFEST "  ManifestVersion: 3\n";
     print MANIFEST "}\n";
 
-    foreach my $storePath (keys %{$narFiles}) {
+    foreach my $storePath (sort (keys %{$narFiles})) {
         my $narFileList = $$narFiles{$storePath};
         foreach my $narFile (@{$narFileList}) {
             print MANIFEST "{\n";
@@ -189,7 +189,7 @@ sub writeManifest
         }
     }
     
-    foreach my $storePath (keys %{$patches}) {
+    foreach my $storePath (sort (keys %{$patches})) {
         my $patchList = $$patches{$storePath};
         foreach my $patch (@{$patchList}) {
             print MANIFEST "patch {\n";

scripts/show-duplication.pl

@@ -0,0 +1,73 @@
+#! /usr/bin/perl -w
+
+if (scalar @ARGV != 1) {
+    print "syntax: show-duplication.pl PATH\n";
+    exit 1;
+}
+
+my $root = $ARGV[0];
+
+
+my $nameRE = "(?:(?:[A-Za-z0-9\+\_]|(?:-[^0-9]))+)";
+my $versionRE = "(?:[A-Za-z0-9\.\-]+)";
+
+
+my %pkgInstances;
+
+
+my $pid = open(PATHS, "-|") || exec "nix-store", "-qR", $root;
+while (<PATHS>) {
+    chomp;
+    /^.*\/[0-9a-z]*-(.*)$/;
+    my $nameVersion = $1;
+    $nameVersion =~ /^($nameRE)(-($versionRE))?$/;
+    $name = $1;
+    $version = $3;
+    $version = "(unnumbered)" unless defined $version;
+#    print "$nameVersion $name $version\n";
+    push @{$pkgInstances{$name}}, {version => $version, path => $_};
+}
+close PATHS or exit 1;
+
+
+sub pathSize {
+    my $path = shift;
+    my @st = lstat $path or die;
+
+    my $size = $st[7];
+
+    if (-d $path) {
+        opendir DIR, $path or die;
+        foreach my $name (readdir DIR) {
+            next if $name eq "." || $name eq "..";
+            $size += pathSize("$path/$name");
+        }
+    }
+    
+    return $size;
+}
+
+
+my $totalPaths = 0;
+my $totalSize = 0, $totalWaste = 0;
+
+foreach my $name (sort {scalar @{$pkgInstances{$b}} <=> scalar @{$pkgInstances{$a}}} (keys %pkgInstances)) {
+    print "$name ", scalar @{$pkgInstances{$name}}, "\n";
+    my $allSize = 0;
+    foreach my $x (sort {$a->{version} cmp $b->{version}} @{$pkgInstances{$name}}) {
+        $totalPaths++;
+        my $size = pathSize $x->{path};
+        $allSize += $size;
+        print "    $x->{version} $size\n";
+    }
+    my $avgSize = int($allSize / scalar @{$pkgInstances{$name}});
+    my $waste = $allSize - $avgSize;
+    $totalSize += $allSize;
+    $totalWaste += $waste;
+    print "    average $avgSize, waste $waste\n";
+}
+
+
+my $avgDupl = $totalPaths / scalar (keys %pkgInstances);
+my $wasteFactor = ($totalWaste / $totalSize) * 100;
+print "average package duplication $avgDupl, total size $totalSize, total waste $totalWaste, $wasteFactor% wasted\n";

src/Makefile.am

@@ -1,5 +1,5 @@
 SUBDIRS = bin2c boost libutil libstore libmain nix-store nix-hash \
- libexpr nix-instantiate nix-env log2xml bsdiff-4.2
+ libexpr nix-instantiate nix-env nix-log2xml bsdiff-4.3
 
 EXTRA_DIST = aterm-helper.pl
 

src/aterm-helper.pl

@@ -40,6 +40,12 @@ my $initFun = "init";
 open HEADER, ">$ARGV[0]";
 open IMPL, ">$ARGV[1]";
 
+print HEADER "#include <aterm2.h>\n";
+print HEADER "#ifdef __cplusplus\n";
+print HEADER "namespace nix {\n";
+print HEADER "#endif\n\n\n";
+print IMPL "namespace nix {\n";
+
 while (<STDIN>) {
     next if (/^\s*$/);
     
@@ -99,8 +105,17 @@ while (<STDIN>) {
         
         print IMPL "AFun sym$funname = 0;\n";
         
+        if ($arity == 0) {
+            print HEADER "extern ATerm const$funname;\n\n";
+            print IMPL "ATerm const$funname = 0;\n";
+        }
+        
+        print HEADER "static inline $result make$funname($formals) __attribute__ ((pure, nothrow));\n";
         print HEADER "static inline $result make$funname($formals) {\n";
-        if ($arity <= 6) {
+        if ($arity == 0) {
+            print HEADER "    return const$funname;\n";
+        }
+        elsif ($arity <= 6) {
             print HEADER "    return (ATerm) ATmakeAppl$arity(sym$funname$args);\n";
         } else {
             $args =~ s/^,//;
@@ -119,6 +134,10 @@ while (<STDIN>) {
 
         $init .= "    sym$funname = ATmakeAFun(\"$const\", $arity, ATfalse);\n";
         $init .= "    ATprotectAFun(sym$funname);\n";
+        if ($arity == 0) {
+            $init .= "    const$funname = (ATerm) ATmakeAppl0(sym$funname);\n";
+            $init .= "    ATprotect(&const$funname);\n";
+        }
     }
 
     elsif (/^\s*(\w+)\s*=\s*(.*)$/) {
@@ -149,5 +168,10 @@ print IMPL "void $initFun() {\n";
 print IMPL "$init";
 print IMPL "}\n";
 
+print HEADER "#ifdef __cplusplus\n";
+print HEADER "}\n";
+print HEADER "#endif\n\n\n";
+print IMPL "}\n";
+
 close HEADER;
 close IMPL;

src/boost/Makefile.am

@@ -1,6 +1,8 @@
 SUBDIRS = format
 
-EXTRA_DIST = assert.hpp checked_delete.hpp format.hpp \
+pkginclude_HEADERS = assert.hpp checked_delete.hpp format.hpp \
  shared_ptr.hpp weak_ptr.hpp throw_exception.hpp \
  enable_shared_from_this.hpp \
  detail/shared_count.hpp detail/workaround.hpp
+
+pkgincludedir = ${includedir}/nix/boost

src/boost/format/Makefile.am

@@ -1,8 +1,12 @@
-noinst_LIBRARIES = libformat.a
+pkglib_LTLIBRARIES = libformat.la
 
-libformat_a_SOURCES = format_implementation.cc free_funcs.cc \
- parsing.cc exceptions.hpp feed_args.hpp format_class.hpp \
+libformat_la_SOURCES = format_implementation.cc free_funcs.cc \
+ parsing.cc 
+
+pkginclude_HEADERS = exceptions.hpp feed_args.hpp format_class.hpp \
  format_fwd.hpp group.hpp internals.hpp internals_fwd.hpp \
  macros_default.hpp
 
-AM_CXXFLAGS = -Wall -I../..
+pkgincludedir = ${includedir}/nix/boost/format
+
+AM_CXXFLAGS = -Wall -I$(srcdir)/../..

src/bsdiff-4.2/LICENSE

@@ -1,121 +0,0 @@
-BSD Protection License
-February 2002
-
-Preamble
---------
-
-The Berkeley Software Distribution ("BSD") license has proven very effective
-over the years at allowing for a wide spread of work throughout both
-commercial and non-commercial products.  For programmers whose primary
-intention is to improve the general quality of available software, it is
-arguable that there is no better license than the BSD license, as it
-permits improvements to be used wherever they will help, without idealogical
-or metallic constraint.
-
-This is of particular value to those who produce reference implementations
-of proposed standards: The case of TCP/IP clearly illustrates that freely
-and universally available implementations leads the rapid acceptance of
-standards -- often even being used instead of a de jure standard (eg, OSI
-network models).
-
-With the rapid proliferation of software licensed under the GNU General
-Public License, however, the continued success of this role is called into
-question.  Given that the inclusion of a few lines of "GPL-tainted" work
-into a larger body of work will result in restricted distribution -- and
-given that further work will likely build upon the "tainted" portions,
-making them difficult to remove at a future date -- there are inevitable
-circumstances where authors would, in order to protect their goal of
-providing for the widespread usage of their work, wish to guard against
-such "GPL-taint".
-
-In addition, one can imagine that companies which operate by producing and
-selling (possibly closed-source) code would wish to protect themselves
-against the rise of a GPL-licensed competitor.  While under existing
-licenses this would mean not releasing their code under any form of open
-license, if a license existed under which they could incorporate any
-improvements back into their own (commercial) products then they might be
-far more willing to provide for non-closed distribution.
-
-For the above reasons, we put forth this "BSD Protection License": A
-license designed to retain the freedom granted by the BSD license to use
-licensed works in a wide variety of settings, both non-commercial and
-commercial, while protecting the work from having future contributors
-restrict that freedom.
-
-The precise terms and conditions for copying, distribution, and
-modification follow.
-
-BSD PROTECTION LICENSE
-TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION, AND MODIFICATION
-----------------------------------------------------------------
-
-0. Definitions.
-   a) "Program", below, refers to any program or work distributed under
-      the terms of this license.
-   b) A "work based on the Program", below, refers to either the Program
-      or any derivative work under copyright law.
-   c) "Modification", below, refers to the act of creating derivative works.
-   d) "You", below, refers to each licensee.
-
-1. Scope.
-   This license governs the copying, distribution, and modification of the
-   Program.  Other activities are outside the scope of this license; The
-   act of running the Program is not restricted, and the output from the
-   Program is covered only if its contents constitute a work based on the
-   Program.
-
-2. Verbatim copies.
-   You may copy and distribute verbatim copies of the Program as you
-   receive it, in any medium, provided that you conspicuously and
-   appropriately publish on each copy an appropriate copyright notice; keep
-   intact all the notices that refer to this License and to the absence of
-   any warranty; and give any other recipients of the Program a copy of this
-   License along with the Program.
-
-3. Modification and redistribution under closed license.
-   You may modify your copy or copies of the Program, and distribute
-   the resulting derivative works, provided that you meet the
-   following conditions:
-   a) The copyright notice and disclaimer on the Program must be reproduced
-      and included in the source code, documentation, and/or other materials
-      provided in a manner in which such notices are normally distributed.
-   b) The derivative work must be clearly identified as such, in order that
-      it may not be confused with the original work.
-   c) The license under which the derivative work is distributed must
-      expressly prohibit the distribution of further derivative works.
-
-4. Modification and redistribution under open license.
-   You may modify your copy or copies of the Program, and distribute
-   the resulting derivative works, provided that you meet the
-   following conditions:
-   a) The copyright notice and disclaimer on the Program must be reproduced
-      and included in the source code, documentation, and/or other materials
-      provided in a manner in which such notices are normally distributed.
-   b) You must clearly indicate the nature and date of any changes made
-      to the Program.  The full details need not necessarily be included in
-      the individual modified files, provided that each modified file is
-      clearly marked as such and instructions are included on where the
-      full details of the modifications may be found.
-   c) You must cause any work that you distribute or publish, that in whole
-      or in part contains or is derived from the Program or any part
-      thereof, to be licensed as a whole at no charge to all third
-      parties under the terms of this License.
-
-5. Implied acceptance.
-   You may not copy or distribute the Program or any derivative works except
-   as expressly provided under this license.  Consequently, any such action
-   will be taken as implied acceptance of the terms of this license.
-
-6. NO WARRANTY.
-   THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
-   INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
-   AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
-   THE COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-   REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE FOR ANY DIRECT,
-   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-   ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING, BUT
-   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
-   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
-   TORT, EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-   POSSIBILITY OF SUCH DAMAGES.

src/bsdiff-4.2/Makefile.am

@@ -1,7 +0,0 @@
-libexec_PROGRAMS = bsdiff bspatch
-
-bsdiff_SOURCES = bsdiff.c
-
-bspatch_SOURCES = bspatch.c
-
-AM_CFLAGS = -O3 -DBZIP2=\"$(bzip2)\"

src/bsdiff-4.2/Makefile.old

@@ -1,18 +0,0 @@
-CFLAGS		+=	-O3
-.ifdef BZIP2
-CFLAGS		+=	-DBZIP2=\"${BZIP2}\"
-.endif
-
-PREFIX		?=	/usr/local
-INSTALL_PROGRAM	?=	${INSTALL} -c -s -m 555
-INSTALL_MAN	?=	${INSTALL} -c -m 444
-
-all:		bsdiff bspatch
-bsdiff:		bsdiff.c
-bspatch:	bspatch.c
-
-install:
-	${INSTALL_PROGRAM} bsdiff bspatch ${PREFIX}/bin
-.ifndef WITHOUT_MAN
-	${INSTALL_MAN} bsdiff.1 bspatch.1 ${PREFIX}/man/man1
-.endif

src/bsdiff-4.2/bsdiff.1

@@ -1,36 +0,0 @@
-.Dd May 18, 2003
-.Dt BSDIFF 1
-.Os FreeBSD
-.Sh NAME
-.Nm bsdiff
-.Nd generate a patch between two binary files
-.Sh SYNOPSIS
-.Nm
-.Ao Ar oldfile Ac Ao Ar newfile Ac Ao Ar patchfile Ac
-.Sh DESCRIPTION
-.Nm
-compares
-.Ao Ar oldfile Ac
-to
-.Ao Ar newfile Ac
-and writes to
-.Ao Ar patchfile Ac
-a binary patch suitable for use by bspatch(1).
-When
-.Ao Ar oldfile Ac
-and
-.Ao Ar newfile Ac
-are two versions of an executable program, the
-patches produced are on average a factor of five smaller
-than those produced by any other binary patch tool known
-to the author.
-.Pp
-.Nm
-uses memory equal to 17 times the size of 
-.Ao Ar oldfile Ac ,
-and requires
-an absolute minimum working set size of 8 times the size of oldfile.
-.Sh SEE ALSO
-.Xr bspatch 1
-.Sh AUTHORS
-.An Colin Percival Aq cperciva@daemonology.net

src/bsdiff-4.2/bspatch.1

@@ -1,32 +0,0 @@
-.Dd May 18, 2003
-.Dt BSPATCH 1
-.Os FreeBSD
-.Sh NAME
-.Nm bspatch
-.Nd apply a patch built with bsdiff(1)
-.Sh SYNOPSIS
-.Nm
-.Ao Ar oldfile Ac Ao Ar newfile Ac Ao Ar patchfile Ac
-.Sh DESCRIPTION
-.Nm
-generates
-.Ao Ar newfile Ac
-from
-.Ao Ar oldfile Ac
-and
-.Ao Ar patchfile Ac
-where
-.Ao Ar patchfile Ac
-is a binary patch built by bsdiff(1).
-.Pp
-.Nm
-uses memory equal to the size of 
-.Ao Ar oldfile Ac
-plus the size of 
-.Ao Ar newfile Ac ,
-but can tolerate a very small working set without a dramatic loss
-of performance.
-.Sh SEE ALSO
-.Xr bsdiff 1
-.Sh AUTHORS
-.An Colin Percival Aq cperciva@daemonology.net

src/bsdiff-4.2/bspatch.c

@@ -1,216 +0,0 @@
-/*
-  .c -- Binary patcher
-
-  Copyright 2003,2004 Colin Percival
-
-  For the terms under which this work may be distributed, please see
-  the adjoining file "LICENSE".
-*/
-
-#ifndef BZIP2
-#define BZIP2 "/usr/bin/bzip2"
-#endif
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <err.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/wait.h>
-
-ssize_t loopread(int d,void *buf,size_t nbytes)
-{
-	ssize_t ptr,lenread;
-
-	for(ptr=0;ptr<nbytes;ptr+=lenread) {
-		lenread=read(d,buf+ptr,nbytes-ptr);
-		if(lenread==0) return ptr;
-		if(lenread==-1) return -1;
-	};
-	return ptr;
-}
-
-int bz2read(int fd,off_t offset,off_t len,char * fname,pid_t * pids)
-{
-	int p0[2],p1[2];
-	u_char * data;
-
-	if((pipe(p0)==-1) || (pipe(p1)==-1)) err(1,NULL);
-
-	if((pids[0]=fork())==-1) err(1,NULL);
-	if(pids[0]==0) {
-		if(close(0) || close(1) || close(p0[0]) ||
-			close(p1[0]) || close(p1[1])) err(1,NULL);
-		if((data=malloc(len+1))==NULL) err(1,NULL);
-		if((pread(fd,data,len,offset)!=len) || close(fd))
-			err(1,"%s",fname);
-		if((write(p0[1],data,len)!=len) || close(p0[1]))
-			err(1,NULL);
-		free(data);
-		_exit(0);
-	};
-
-	if((pids[1]=fork())==-1) err(1,NULL);
-	if(pids[1]==0) {
-		if(close(0) || close(1) || close(p0[1]) ||
-			close(p1[0])) err(1,NULL);
-		if((dup2(p0[0],0)==-1) || close(p0[0])) err(1,NULL);
-		if((dup2(p1[1],1)==-1) || close(p1[1])) err(1,NULL);
-		if(close(fd)==-1) err(1,"%s",fname);
-
-		execl(BZIP2,BZIP2,"-dc",NULL);
-		err(1,"%s",BZIP2);
-	};
-
-	if(close(p0[0]) || close(p0[1]) || close(p1[1])) err(1,NULL);
-
-	return p1[0];
-}
-
-off_t offtin(u_char *buf)
-{
-	off_t y;
-
-	y=buf[7]&0x7F;
-	y=y*256;y+=buf[6];
-	y=y*256;y+=buf[5];
-	y=y*256;y+=buf[4];
-	y=y*256;y+=buf[3];
-	y=y*256;y+=buf[2];
-	y=y*256;y+=buf[1];
-	y=y*256;y+=buf[0];
-
-	if(buf[7]&0x80) y=-y;
-
-	return y;
-}
-
-int main(int argc,char * argv[])
-{
-	int fd,ctrlpipe,diffpipe,extrapipe;
-	pid_t pids[6];
-	ssize_t patchsize,oldsize,newsize;
-	ssize_t bzctrllen,bzdatalen;
-	u_char header[32],buf[8];
-	int version=0;
-	u_char *old, *new;
-	off_t oldpos,newpos;
-	off_t ctrl[3];
-	off_t lenread;
-	off_t i;
-
-	if(argc!=4) errx(1,"usage: %s oldfile newfile patchfile\n",argv[0]);
-
-	if(((fd=open(argv[3],O_RDONLY,0))<0) ||
-		((patchsize=lseek(fd,0,SEEK_END))==-1) ||
-		(lseek(fd,0,SEEK_SET)!=0)) err(1,"%s",argv[3]);
-	if(patchsize<32) errx(1,"Corrupt patch\n");
-
-	/*
-	  Ok, this is going to be messy.  There are two different patch
-	formats which we need to support.
-
-	  The old format (pre-4.0) is:
-		0	8	"QSUFDIFF" or "BSDIFF30"
-		8	8	X
-		16	8	Y
-		24	8	sizeof(newfile)
-		32	X	bzip2(control block)
-		32+X	Y	bzip2(data block)
-	with control block a set of pairs (x,y) meaning "seek forward
-	in oldfile by y bytes, and add the next x bytes to x bytes from
-	the data block".
-
-	  The new format (4.0) is:
-		0	8	"BSDIFF40"
-		8	8	X
-		16	8	Y
-		24	8	sizeof(newfile)
-		32	X	bzip2(control block)
-		32+X	Y	bzip2(diff block)
-		32+X+Y	???	bzip2(extra block)
-	with control block a set of triples (x,y,z) meaning "add x bytes
-	from oldfile to x bytes from the diff block; copy y bytes from the
-	extra block; seek forwards in oldfile by z bytes".
-	*/
-
-	if(read(fd,header,32)!=32) err(1,"%s",argv[3]);
-	if(memcmp(header,"QSUFDIFF",8)==0) version=1;
-	if(memcmp(header,"BSDIFF30",8)==0) version=1;
-	if(memcmp(header,"BSDIFF40",8)==0) version=2;
-
-	if(!version) errx(1,"Corrupt patch\n");
-
-	bzctrllen=offtin(header+8);
-	bzdatalen=offtin(header+16);
-	newsize=offtin(header+24);
-	if((bzctrllen<0) || (bzdatalen<0) || (newsize<0) ||
-		((version==1) && (32+bzctrllen+bzdatalen!=patchsize)))
-		errx(1,"Corrupt patch\n");
-
-	ctrlpipe=bz2read(fd,32,bzctrllen,argv[3],pids);
-	diffpipe=bz2read(fd,32+bzctrllen,bzdatalen,argv[3],pids+2);
-	if(version==2) {
-		extrapipe=bz2read(fd,32+bzctrllen+bzdatalen,
-			patchsize-(32+bzctrllen+bzdatalen),argv[3],pids+4);
-	};
-
-	if(close(fd)==-1) err(1,"%s",argv[3]);
-	if(((fd=open(argv[1],O_RDONLY,0))<0) ||
-		((oldsize=lseek(fd,0,SEEK_END))==-1) ||
-		((old=malloc(oldsize+1))==NULL) ||
-		(lseek(fd,0,SEEK_SET)!=0) ||
-		(read(fd,old,oldsize)!=oldsize) ||
-		(close(fd)==-1)) err(1,"%s",argv[1]);
-	if((new=malloc(newsize+1))==NULL) err(1,NULL);
-
-	oldpos=0;newpos=0;
-	while(newpos<newsize) {
-		for(i=0;i<=version;i++) {
-			if((lenread=loopread(ctrlpipe,buf,8))<0) err(1,NULL);
-			if(lenread<8) errx(1,"Corrupt patch\n");
-			ctrl[i]=offtin(buf);
-		};
-
-		if(version==1) oldpos+=ctrl[1];
-
-		if(newpos+ctrl[0]>newsize) errx(1,"Corrupt patch\n");
-		if((lenread=loopread(diffpipe,new+newpos,ctrl[0]))<0)
-			err(1,NULL);
-		if(lenread!=ctrl[0]) errx(1,"Corrupt patch\n");
-		for(i=0;i<ctrl[0];i++)
-			if((oldpos+i>=0) && (oldpos+i<oldsize))
-				new[newpos+i]+=old[oldpos+i];
-		newpos+=ctrl[0];
-		oldpos+=ctrl[0];
-
-		if(version==2) {
-			if(newpos+ctrl[1]>newsize) errx(1,"Corrupt patch\n");
-			if((lenread=loopread(extrapipe,new+newpos,ctrl[1]))<0)
-				err(1,NULL);
-			if(lenread!=ctrl[1]) errx(1,"Corrupt patch\n");
-
-			newpos+=ctrl[1];
-			oldpos+=ctrl[2];
-		};
-	};
-
-	if(loopread(ctrlpipe,buf,1)!=0) errx(1,"Corrupt patch\n");
-	if(loopread(diffpipe,buf,1)!=0) errx(1,"Corrupt patch\n");
-	if(version==2)
-		if(loopread(extrapipe,buf,1)!=0) errx(1,"Corrupt patch\n");
-
-	if(close(ctrlpipe) || close(diffpipe) || 
-		((version==2) && close(extrapipe)))
-		err(1,NULL);
-	for(i=0;i<(version+1)*2;i++) waitpid(pids[i],NULL,0);
-
-	if(((fd=open(argv[2],O_CREAT|O_TRUNC|O_WRONLY,0666))<0) ||
-		(write(fd,new,newsize)!=newsize) || (close(fd)==-1))
-		err(1,"%s",argv[2]);
-
-	free(new);
-	free(old);
-
-	return 0;
-}

src/bsdiff-4.3/Makefile.am

@@ -0,0 +1,11 @@
+libexec_PROGRAMS = bsdiff bspatch
+
+bsdiff_SOURCES = bsdiff.c
+
+bsdiff_LDADD = ${bzip2_lib}
+
+bspatch_SOURCES = bspatch.c
+
+bspatch_LDADD = ${bzip2_lib}
+
+AM_CFLAGS = -O3 ${bzip2_include}

src/bsdiff-4.3/bsdiff.1

@@ -0,0 +1,63 @@
+.\"-
+.\" Copyright 2003-2005 Colin Percival
+.\" All rights reserved
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted providing that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.\" $FreeBSD: src/usr.bin/bsdiff/bsdiff/bsdiff.1,v 1.1 2005/08/06 01:59:05 cperciva Exp $
+.\"
+.Dd May 18, 2003
+.Dt BSDIFF 1
+.Os FreeBSD
+.Sh NAME
+.Nm bsdiff
+.Nd generate a patch between two binary files
+.Sh SYNOPSIS
+.Nm
+.Ao Ar oldfile Ac Ao Ar newfile Ac Ao Ar patchfile Ac
+.Sh DESCRIPTION
+.Nm
+compares
+.Ao Ar oldfile Ac
+to
+.Ao Ar newfile Ac
+and writes to
+.Ao Ar patchfile Ac
+a binary patch suitable for use by bspatch(1).
+When
+.Ao Ar oldfile Ac
+and
+.Ao Ar newfile Ac
+are two versions of an executable program, the
+patches produced are on average a factor of five smaller
+than those produced by any other binary patch tool known
+to the author.
+.Pp
+.Nm
+uses memory equal to 17 times the size of 
+.Ao Ar oldfile Ac ,
+and requires
+an absolute minimum working set size of 8 times the size of oldfile.
+.Sh SEE ALSO
+.Xr bspatch 1
+.Sh AUTHORS
+.An Colin Percival Aq cperciva@freebsd.org

src/bsdiff-4.3/bsdiff.c

@@ -1,27 +1,46 @@
-/*
-  bsdiff.c -- Binary patch generator.
+/*-
+ * Copyright 2003-2005 Colin Percival
+ * All rights reserved
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted providing that the following conditions 
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
 
-  Copyright 2003 Colin Percival
-
-  For the terms under which this work may be distributed, please see
-  the adjoining file "LICENSE".
-*/
-
-#ifndef BZIP2
-#define BZIP2 "/usr/bin/bzip2"
+#if 0
+__FBSDID("$FreeBSD: src/usr.bin/bsdiff/bsdiff/bsdiff.c,v 1.1 2005/08/06 01:59:05 cperciva Exp $");
 #endif
 
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
+#include <sys/types.h>
+
+#include <bzlib.h>
 #include <err.h>
-#include <unistd.h>
 #include <fcntl.h>
-#include <sys/wait.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 #define MIN(x,y) (((x)<(y)) ? (x) : (y))
 
-void split(off_t *I,off_t *V,off_t start,off_t len,off_t h)
+static void split(off_t *I,off_t *V,off_t start,off_t len,off_t h)
 {
 	off_t i,j,k,x,tmp,jj,kk;
 
@@ -82,7 +101,7 @@ void split(off_t *I,off_t *V,off_t start,off_t len,off_t h)
 	if(start+len>kk) split(I,V,kk,start+len-kk,h);
 }
 
-void qsufsort(off_t *I,off_t *V,u_char *old,off_t oldsize)
+static void qsufsort(off_t *I,off_t *V,u_char *old,off_t oldsize)
 {
 	off_t buckets[256];
 	off_t i,h,len;
@@ -120,7 +139,7 @@ void qsufsort(off_t *I,off_t *V,u_char *old,off_t oldsize)
 	for(i=0;i<oldsize+1;i++) I[V[i]]=i;
 }
 
-off_t matchlen(u_char *old,off_t oldsize,u_char *new,off_t newsize)
+static off_t matchlen(u_char *old,off_t oldsize,u_char *new,off_t newsize)
 {
 	off_t i;
 
@@ -130,7 +149,7 @@ off_t matchlen(u_char *old,off_t oldsize,u_char *new,off_t newsize)
 	return i;
 }
 
-off_t search(off_t *I,u_char *old,off_t oldsize,
+static off_t search(off_t *I,u_char *old,off_t oldsize,
 		u_char *new,off_t newsize,off_t st,off_t en,off_t *pos)
 {
 	off_t x,y;
@@ -156,7 +175,7 @@ off_t search(off_t *I,u_char *old,off_t oldsize,
 	};
 }
 
-void offtout(off_t x,u_char *buf)
+static void offtout(off_t x,u_char *buf)
 {
 	off_t y;
 
@@ -176,25 +195,23 @@ void offtout(off_t x,u_char *buf)
 
 int main(int argc,char *argv[])
 {
-	int fd,p[2];
-	pid_t pid;
+	int fd;
 	u_char *old,*new;
 	off_t oldsize,newsize;
 	off_t *I,*V;
-
 	off_t scan,pos,len;
 	off_t lastscan,lastpos,lastoffset;
 	off_t oldscore,scsc;
-
 	off_t s,Sf,lenf,Sb,lenb;
 	off_t overlap,Ss,lens;
 	off_t i;
-
 	off_t dblen,eblen;
 	u_char *db,*eb;
-
 	u_char buf[8];
 	u_char header[32];
+	FILE * pf;
+	BZFILE * pfbz2;
+	int bz2err;
 
 	if(argc!=4) errx(1,"usage: %s oldfile newfile patchfile\n",argv[0]);
 
@@ -228,8 +245,9 @@ int main(int argc,char *argv[])
 	dblen=0;
 	eblen=0;
 
-	if((fd=open(argv[3],O_CREAT|O_TRUNC|O_WRONLY,0666))<0)
-		err(1,"%s",argv[3]);
+	/* Create the patch file */
+	if ((pf = fopen(argv[3], "w")) == NULL)
+		err(1, "%s", argv[3]);
 
 	/* Header is
 		0	8	 "BSDIFF40"
@@ -242,20 +260,15 @@ int main(int argc,char *argv[])
 		??	??	Bzip2ed diff block
 		??	??	Bzip2ed extra block */
 	memcpy(header,"BSDIFF40",8);
-	memset(header+8,0,24);
-	if(write(fd,header,32)!=32) err(1,"%s",argv[3]);
-
-	if((pipe(p)==-1) || ((pid=fork())==-1)) err(1,NULL);
-	if(pid==0) {
-		if((close(0)==-1) || (close(1)==-1) || (dup2(fd,1)==-1) ||
-			(dup2(p[0],0)==-1) || (close(fd)==-1) ||
-			(close(p[0])==-1) || (close(p[1])==-1))
-			err(1,NULL);
-		execl(BZIP2,BZIP2,"-zc",NULL);
-		err(1,"%s",BZIP2);
-	};
-	if(close(p[0])==-1) err(1,NULL);
+	offtout(0, header + 8);
+	offtout(0, header + 16);
+	offtout(newsize, header + 24);
+	if (fwrite(header, 32, 1, pf) != 1)
+		err(1, "fwrite(%s)", argv[3]);
 
+	/* Compute the differences, writing ctrl as we go */
+	if ((pfbz2 = BZ2_bzWriteOpen(&bz2err, pf, 9, 0, 0)) == NULL)
+		errx(1, "BZ2_bzWriteOpen, bz2err = %d", bz2err);
 	scan=0;len=0;
 	lastscan=0;lastpos=0;lastoffset=0;
 	while(scan<newsize) {
@@ -319,62 +332,68 @@ int main(int argc,char *argv[])
 			eblen+=(scan-lenb)-(lastscan+lenf);
 
 			offtout(lenf,buf);
-			if(write(p[1],buf,8)!=8) err(1,NULL);
+			BZ2_bzWrite(&bz2err, pfbz2, buf, 8);
+			if (bz2err != BZ_OK)
+				errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
+
 			offtout((scan-lenb)-(lastscan+lenf),buf);
-			if(write(p[1],buf,8)!=8) err(1,NULL);
+			BZ2_bzWrite(&bz2err, pfbz2, buf, 8);
+			if (bz2err != BZ_OK)
+				errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
+
 			offtout((pos-lenb)-(lastpos+lenf),buf);
-			if(write(p[1],buf,8)!=8) err(1,NULL);
+			BZ2_bzWrite(&bz2err, pfbz2, buf, 8);
+			if (bz2err != BZ_OK)
+				errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
 
 			lastscan=scan-lenb;
 			lastpos=pos-lenb;
 			lastoffset=pos-scan;
 		};
 	};
+	BZ2_bzWriteClose(&bz2err, pfbz2, 0, NULL, NULL);
+	if (bz2err != BZ_OK)
+		errx(1, "BZ2_bzWriteClose, bz2err = %d", bz2err);
 
-	if((close(p[1])==-1) || (waitpid(pid,NULL,0)!=pid)) err(1,NULL);
+	/* Compute size of compressed ctrl data */
+	if ((len = ftello(pf)) == -1)
+		err(1, "ftello");
+	offtout(len-32, header + 8);
 
-	if((len=lseek(fd,0,SEEK_END))==-1) err(1,"%s",argv[3]);
-	offtout(len-32,buf);
-	if((lseek(fd,8,SEEK_SET)!=8) || (write(fd,buf,8)!=8))
-		err(1,"%s",argv[3]);
-	offtout(newsize,buf);
-	if((lseek(fd,24,SEEK_SET)!=24) || (write(fd,buf,8)!=8))
-		err(1,"%s",argv[3]);
+	/* Write compressed diff data */
+	if ((pfbz2 = BZ2_bzWriteOpen(&bz2err, pf, 9, 0, 0)) == NULL)
+		errx(1, "BZ2_bzWriteOpen, bz2err = %d", bz2err);
+	BZ2_bzWrite(&bz2err, pfbz2, db, dblen);
+	if (bz2err != BZ_OK)
+		errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
+	BZ2_bzWriteClose(&bz2err, pfbz2, 0, NULL, NULL);
+	if (bz2err != BZ_OK)
+		errx(1, "BZ2_bzWriteClose, bz2err = %d", bz2err);
 
-	if(lseek(fd,0,SEEK_END)==-1) err(1,"%s",argv[3]);
-	if((pipe(p)==-1) || ((pid=fork())==-1)) err(1,NULL);
-	if(pid==0) {
-		if((close(0)==-1) || (close(1)==-1) || (dup2(fd,1)==-1) ||
-			(dup2(p[0],0)==-1) || (close(fd)==-1) ||
-			(close(p[0])==-1) || (close(p[1])==-1))
-			err(1,NULL);
-		execl(BZIP2,BZIP2,"-zc",NULL);
-		err(1,"%s",BZIP2);
-	};
-	if(close(p[0])==-1) err(1,NULL);
-	if(write(p[1],db,dblen)!=dblen) err(1,NULL);
-	if((close(p[1])==-1) || (waitpid(pid,NULL,0)!=pid)) err(1,NULL);
+	/* Compute size of compressed diff data */
+	if ((newsize = ftello(pf)) == -1)
+		err(1, "ftello");
+	offtout(newsize - len, header + 16);
 
-	if((newsize=lseek(fd,0,SEEK_END))==-1) err(1,"%s",argv[3]);
-	offtout(newsize-len,buf);
-	if((lseek(fd,16,SEEK_SET)!=16) || (write(fd,buf,8)!=8))
-		err(1,"%s",argv[3]);
+	/* Write compressed extra data */
+	if ((pfbz2 = BZ2_bzWriteOpen(&bz2err, pf, 9, 0, 0)) == NULL)
+		errx(1, "BZ2_bzWriteOpen, bz2err = %d", bz2err);
+	BZ2_bzWrite(&bz2err, pfbz2, eb, eblen);
+	if (bz2err != BZ_OK)
+		errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
+	BZ2_bzWriteClose(&bz2err, pfbz2, 0, NULL, NULL);
+	if (bz2err != BZ_OK)
+		errx(1, "BZ2_bzWriteClose, bz2err = %d", bz2err);
 
-	if(lseek(fd,0,SEEK_END)==-1) err(1,"%s",argv[3]);
-	if((pipe(p)==-1) || ((pid=fork())==-1)) err(1,NULL);
-	if(pid==0) {
-		if((close(0)==-1) || (close(1)==-1) || (dup2(fd,1)==-1) ||
-			(dup2(p[0],0)==-1) || (close(fd)==-1) ||
-			(close(p[0])==-1) || (close(p[1])==-1))
-			err(1,NULL);
-		execl(BZIP2,BZIP2,"-zc",NULL);
-		err(1,"%s",BZIP2);
-	};
-	if(close(p[0])==-1) err(1,NULL);
-	if(write(p[1],eb,eblen)!=eblen) err(1,NULL);
-	if((close(p[1])==-1) || (waitpid(pid,NULL,0)!=pid)) err(1,NULL);
-	if(close(fd)==-1) err(1,"%s",argv[3]);
+	/* Seek to the beginning, write the header, and close the file */
+	if (fseeko(pf, 0, SEEK_SET))
+		err(1, "fseeko");
+	if (fwrite(header, 32, 1, pf) != 1)
+		err(1, "fwrite(%s)", argv[3]);
+	if (fclose(pf))
+		err(1, "fclose");
 
+	/* Free the memory we used */
 	free(db);
 	free(eb);
 	free(I);

src/bsdiff-4.3/bspatch.1

@@ -0,0 +1,59 @@
+.\"-
+.\" Copyright 2003-2005 Colin Percival
+.\" All rights reserved
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted providing that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+.\" IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.\" $FreeBSD: src/usr.bin/bsdiff/bspatch/bspatch.1,v 1.1 2005/08/06 01:59:06 cperciva Exp $
+.\"
+.Dd May 18, 2003
+.Dt BSPATCH 1
+.Os FreeBSD
+.Sh NAME
+.Nm bspatch
+.Nd apply a patch built with bsdiff(1)
+.Sh SYNOPSIS
+.Nm
+.Ao Ar oldfile Ac Ao Ar newfile Ac Ao Ar patchfile Ac
+.Sh DESCRIPTION
+.Nm
+generates
+.Ao Ar newfile Ac
+from
+.Ao Ar oldfile Ac
+and
+.Ao Ar patchfile Ac
+where
+.Ao Ar patchfile Ac
+is a binary patch built by bsdiff(1).
+.Pp
+.Nm
+uses memory equal to the size of 
+.Ao Ar oldfile Ac
+plus the size of 
+.Ao Ar newfile Ac ,
+but can tolerate a very small working set without a dramatic loss
+of performance.
+.Sh SEE ALSO
+.Xr bsdiff 1
+.Sh AUTHORS
+.An Colin Percival Aq cperciva@freebsd.org

src/bsdiff-4.3/bspatch.c

@@ -0,0 +1,223 @@
+/*-
+ * Copyright 2003-2005 Colin Percival
+ * All rights reserved
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted providing that the following conditions 
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if 0
+__FBSDID("$FreeBSD: src/usr.bin/bsdiff/bspatch/bspatch.c,v 1.1 2005/08/06 01:59:06 cperciva Exp $");
+#endif
+
+#include <bzlib.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <err.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+static off_t offtin(u_char *buf)
+{
+	off_t y;
+
+	y=buf[7]&0x7F;
+	y=y*256;y+=buf[6];
+	y=y*256;y+=buf[5];
+	y=y*256;y+=buf[4];
+	y=y*256;y+=buf[3];
+	y=y*256;y+=buf[2];
+	y=y*256;y+=buf[1];
+	y=y*256;y+=buf[0];
+
+	if(buf[7]&0x80) y=-y;
+
+	return y;
+}
+
+
+void writeFull(const char * name, int fd,
+    const unsigned char * buf, size_t count)
+{
+    while (count) {
+        ssize_t res = write(fd, (char *) buf, count);
+        if (res == -1) {
+            if (errno == EINTR) continue;
+            err(1,"writing to %s",name);
+        }
+        count -= res;
+        buf += res;
+    }
+}
+
+
+int main(int argc,char * argv[])
+{
+	FILE * f, * cpf, * dpf, * epf;
+	BZFILE * cpfbz2, * dpfbz2, * epfbz2;
+	int cbz2err, dbz2err, ebz2err;
+	int fd;
+	ssize_t oldsize,newsize;
+	ssize_t bzctrllen,bzdatalen;
+	u_char header[32],buf[8];
+	u_char *old, *new;
+	off_t oldpos,newpos;
+	off_t ctrl[3];
+	off_t lenread;
+	off_t i;
+
+	if(argc!=4) errx(1,"usage: %s oldfile newfile patchfile\n",argv[0]);
+
+	/* Open patch file */
+	if ((f = fopen(argv[3], "r")) == NULL)
+		err(1, "fopen(%s)", argv[3]);
+
+	/*
+	File format:
+		0	8	"BSDIFF40"
+		8	8	X
+		16	8	Y
+		24	8	sizeof(newfile)
+		32	X	bzip2(control block)
+		32+X	Y	bzip2(diff block)
+		32+X+Y	???	bzip2(extra block)
+	with control block a set of triples (x,y,z) meaning "add x bytes
+	from oldfile to x bytes from the diff block; copy y bytes from the
+	extra block; seek forwards in oldfile by z bytes".
+	*/
+
+	/* Read header */
+	if (fread(header, 1, 32, f) < 32) {
+		if (feof(f))
+			errx(1, "Corrupt patch\n");
+		err(1, "fread(%s)", argv[3]);
+	}
+
+	/* Check for appropriate magic */
+	if (memcmp(header, "BSDIFF40", 8) != 0)
+		errx(1, "Corrupt patch\n");
+
+	/* Read lengths from header */
+	bzctrllen=offtin(header+8);
+	bzdatalen=offtin(header+16);
+	newsize=offtin(header+24);
+	if((bzctrllen<0) || (bzdatalen<0) || (newsize<0))
+		errx(1,"Corrupt patch\n");
+
+	/* Close patch file and re-open it via libbzip2 at the right places */
+	if (fclose(f))
+		err(1, "fclose(%s)", argv[3]);
+	if ((cpf = fopen(argv[3], "r")) == NULL)
+		err(1, "fopen(%s)", argv[3]);
+	if (fseeko(cpf, 32, SEEK_SET))
+		err(1, "fseeko(%s, %lld)", argv[3],
+		    (long long)32);
+	if ((cpfbz2 = BZ2_bzReadOpen(&cbz2err, cpf, 0, 0, NULL, 0)) == NULL)
+		errx(1, "BZ2_bzReadOpen, bz2err = %d", cbz2err);
+	if ((dpf = fopen(argv[3], "r")) == NULL)
+		err(1, "fopen(%s)", argv[3]);
+	if (fseeko(dpf, 32 + bzctrllen, SEEK_SET))
+		err(1, "fseeko(%s, %lld)", argv[3],
+		    (long long)(32 + bzctrllen));
+	if ((dpfbz2 = BZ2_bzReadOpen(&dbz2err, dpf, 0, 0, NULL, 0)) == NULL)
+		errx(1, "BZ2_bzReadOpen, bz2err = %d", dbz2err);
+	if ((epf = fopen(argv[3], "r")) == NULL)
+		err(1, "fopen(%s)", argv[3]);
+	if (fseeko(epf, 32 + bzctrllen + bzdatalen, SEEK_SET))
+		err(1, "fseeko(%s, %lld)", argv[3],
+		    (long long)(32 + bzctrllen + bzdatalen));
+	if ((epfbz2 = BZ2_bzReadOpen(&ebz2err, epf, 0, 0, NULL, 0)) == NULL)
+		errx(1, "BZ2_bzReadOpen, bz2err = %d", ebz2err);
+
+	if(((fd=open(argv[1],O_RDONLY,0))<0) ||
+		((oldsize=lseek(fd,0,SEEK_END))==-1) ||
+		((old=malloc(oldsize+1))==NULL) ||
+		(lseek(fd,0,SEEK_SET)!=0) ||
+		(read(fd,old,oldsize)!=oldsize) ||
+		(close(fd)==-1)) err(1,"%s",argv[1]);
+	if((new=malloc(newsize+1))==NULL) err(1,NULL);
+
+	oldpos=0;newpos=0;
+	while(newpos<newsize) {
+		/* Read control data */
+		for(i=0;i<=2;i++) {
+			lenread = BZ2_bzRead(&cbz2err, cpfbz2, buf, 8);
+			if ((lenread < 8) || ((cbz2err != BZ_OK) &&
+			    (cbz2err != BZ_STREAM_END)))
+				errx(1, "Corrupt patch\n");
+			ctrl[i]=offtin(buf);
+		};
+
+		/* Sanity-check */
+		if(newpos+ctrl[0]>newsize)
+			errx(1,"Corrupt patch\n");
+
+		/* Read diff string */
+		lenread = BZ2_bzRead(&dbz2err, dpfbz2, new + newpos, ctrl[0]);
+		if ((lenread < ctrl[0]) ||
+		    ((dbz2err != BZ_OK) && (dbz2err != BZ_STREAM_END)))
+			errx(1, "Corrupt patch\n");
+
+		/* Add old data to diff string */
+		for(i=0;i<ctrl[0];i++)
+			if((oldpos+i>=0) && (oldpos+i<oldsize))
+				new[newpos+i]+=old[oldpos+i];
+
+		/* Adjust pointers */
+		newpos+=ctrl[0];
+		oldpos+=ctrl[0];
+
+		/* Sanity-check */
+		if(newpos+ctrl[1]>newsize)
+			errx(1,"Corrupt patch\n");
+
+		/* Read extra string */
+		lenread = BZ2_bzRead(&ebz2err, epfbz2, new + newpos, ctrl[1]);
+		if ((lenread < ctrl[1]) ||
+		    ((ebz2err != BZ_OK) && (ebz2err != BZ_STREAM_END)))
+			errx(1, "Corrupt patch\n");
+
+		/* Adjust pointers */
+		newpos+=ctrl[1];
+		oldpos+=ctrl[2];
+	};
+
+	/* Clean up the bzip2 reads */
+	BZ2_bzReadClose(&cbz2err, cpfbz2);
+	BZ2_bzReadClose(&dbz2err, dpfbz2);
+	BZ2_bzReadClose(&ebz2err, epfbz2);
+	if (fclose(cpf) || fclose(dpf) || fclose(epf))
+		err(1, "fclose(%s)", argv[3]);
+
+	/* Write the new file */
+	if((fd=open(argv[2],O_CREAT|O_TRUNC|O_WRONLY,0666))<0)
+                err(1,"%s",argv[2]);
+        writeFull(argv[2], fd, new, newsize);
+        if(close(fd)==-1)
+		err(1,"%s",argv[2]);
+
+	free(new);
+	free(old);
+
+	return 0;
+}

src/libexpr/Makefile.am

@@ -1,35 +1,49 @@
-noinst_LIBRARIES = libexpr.a
+pkglib_LTLIBRARIES = libexpr.la
 
-libexpr_a_SOURCES = nixexpr.cc nixexpr.hh parser.cc parser.hh \
- eval.cc eval.hh primops.cc \
- lexer-tab.c lexer-tab.h parser-tab.c parser-tab.h \
- nixexpr-ast.hh
+libexpr_la_SOURCES = \
+ nixexpr.cc eval.cc primops.cc lexer-tab.cc parser-tab.cc \
+ get-drvs.cc attr-path.cc expr-to-xml.cc
+
+pkginclude_HEADERS = \
+ nixexpr.hh eval.hh parser.hh lexer-tab.hh parser-tab.hh \
+ get-drvs.hh attr-path.hh expr-to-xml.hh
+
+libexpr_la_LIBADD = ../libutil/libutil.la ../libstore/libstore.la \
+ ../boost/format/libformat.la
+
+BUILT_SOURCES = nixexpr-ast.cc nixexpr-ast.hh \
+ parser-tab.hh lexer-tab.hh parser-tab.cc lexer-tab.cc
 
 EXTRA_DIST = lexer.l parser.y nixexpr-ast.def nixexpr-ast.cc
 
 AM_CXXFLAGS = \
- -I.. ${bdb_include} ${aterm_include} -I../libutil -I../libstore
+ -I$(srcdir)/.. ${bdb_include} ${aterm_include} \
+ -I$(srcdir)/../libutil -I$(srcdir)/../libstore
 AM_CFLAGS = \
  ${aterm_include}
 
 
 # Parser generation.
 
-parser.o: parser-tab.h lexer-tab.h
+parser-tab.cc parser-tab.hh: parser.y
+	$(bison) -v -o parser-tab.cc $(srcdir)/parser.y -d
 
-parser-tab.c parser-tab.h: parser.y
-	$(bison) -v -o parser-tab.c parser.y -d
-
-lexer-tab.c lexer-tab.h: lexer.l
-	$(flex) --outfile lexer-tab.c --header-file=lexer-tab.h lexer.l 
+lexer-tab.cc lexer-tab.hh: lexer.l
+	$(flex) --outfile lexer-tab.cc --header-file=lexer-tab.hh $(srcdir)/lexer.l 
 
 
 # ATerm helper function generation.
 
 nixexpr-ast.cc nixexpr-ast.hh: ../aterm-helper.pl nixexpr-ast.def
-	$(perl) ../aterm-helper.pl nixexpr-ast.hh nixexpr-ast.cc < nixexpr-ast.def
-
-nixexpr.cc nixexpr.hh: nixexpr-ast.hh
+	$(perl) $(srcdir)/../aterm-helper.pl nixexpr-ast.hh nixexpr-ast.cc < $(srcdir)/nixexpr-ast.def
 
 
 CLEANFILES =
+
+
+# SDF stuff (not built by default).
+nix.tbl: nix.sdf
+	sdf2table -m Nix -s -i nix.sdf -o nix.tbl
+
+test.ast: test.nix nix.tbl
+	sglri -p nix.tbl -i test.nix -o test.ast

src/libexpr/attr-path.cc

@@ -0,0 +1,82 @@
+#include "attr-path.hh"
+#include "nixexpr-ast.hh"
+#include "util.hh"
+
+
+namespace nix {
+
+
+bool isAttrs(EvalState & state, Expr e, ATermMap & attrs)
+{
+    e = evalExpr(state, e);
+    ATermList dummy;
+    if (!matchAttrs(e, dummy)) return false;
+    queryAllAttrs(e, attrs, false);
+    return true;
+}
+
+
+Expr findAlongAttrPath(EvalState & state, const string & attrPath,
+    const ATermMap & autoArgs, Expr e)
+{
+    Strings tokens = tokenizeString(attrPath, ".");
+
+    Error attrError =
+        Error(format("attribute selection path `%1%' does not match expression") % attrPath);
+
+    string curPath;
+    
+    for (Strings::iterator i = tokens.begin(); i != tokens.end(); ++i) {
+
+        if (!curPath.empty()) curPath += ".";
+        curPath += *i;
+
+        /* Is *i an index (integer) or a normal attribute name? */
+        enum { apAttr, apIndex } apType = apAttr;
+        string attr = *i;
+        int attrIndex = -1;
+        if (string2Int(attr, attrIndex)) apType = apIndex;
+
+        /* Evaluate the expression. */
+        e = evalExpr(state, autoCallFunction(evalExpr(state, e), autoArgs));
+
+        /* It should evaluate to either an attribute set or an
+           expression, according to what is specified in the
+           attrPath. */
+
+        if (apType == apAttr) {
+
+            ATermMap attrs(128);
+
+            if (!isAttrs(state, e, attrs))
+                throw TypeError(
+                    format("the expression selected by the selection path `%1%' should be an attribute set but is %2%")
+                    % curPath % showType(e));
+                
+            e = attrs.get(toATerm(attr));
+            if (!e)
+                throw Error(format("attribute `%1%' in selection path `%2%' not found") % attr % curPath);
+
+        }
+
+        else if (apType == apIndex) {
+
+            ATermList es;
+            if (!matchList(e, es))
+                throw TypeError(
+                    format("the expression selected by the selection path `%1%' should be a list but is %2%")
+                    % curPath % showType(e));
+
+            e = ATelementAt(es, attrIndex);
+            if (!e)
+                throw Error(format("list index %1% in selection path `%2%' not found") % attrIndex % curPath);
+            
+        }
+        
+    }
+    
+    return e;
+}
+
+ 
+}

src/libexpr/attr-path.hh

@@ -0,0 +1,20 @@
+#ifndef __ATTR_PATH_H
+#define __ATTR_PATH_H
+
+#include <string>
+#include <map>
+
+#include "eval.hh"
+
+
+namespace nix {
+
+    
+Expr findAlongAttrPath(EvalState & state, const string & attrPath,
+    const ATermMap & autoArgs, Expr e);
+
+    
+}
+
+
+#endif /* !__ATTR_PATH_H */

src/libexpr/eval.cc

@@ -1,13 +1,17 @@
 #include "eval.hh"
 #include "parser.hh"
+#include "hash.hh"
+#include "util.hh"
+#include "store.hh"
 #include "nixexpr-ast.hh"
 
 
-EvalState::EvalState()
-    : normalForms(32768, 50)
-{
-    blackHole = makeBlackHole();
+namespace nix {
     
+
+EvalState::EvalState()
+    : normalForms(32768), primOps(128)
+{
     nrEvaluated = nrCached = 0;
 
     initNixExprHelpers();
@@ -19,46 +23,84 @@ EvalState::EvalState()
 void EvalState::addPrimOp(const string & name,
     unsigned int arity, PrimOp primOp)
 {
-    primOps.set(name, makePrimOpDef(arity, ATmakeBlob(0, (void *) primOp)));
+    primOps.set(toATerm(name), makePrimOpDef(arity, ATmakeBlob(0, (void *) primOp)));
 }
 
 
 /* Substitute an argument set into the body of a function. */
-static Expr substArgs(Expr body, ATermList formals, Expr arg)
+static Expr substArgs(EvalState & state,
+    Expr body, ATermList formals, Expr arg)
 {
-    ATermMap subs;
-    Expr undefined = makeUndefined();
+    unsigned int nrFormals = ATgetLength(formals);
+    ATermMap subs(nrFormals);
 
+    /* Get the actual arguments and put them in the substitution. */
+    ATermMap args(128); /* !!! fix */
+    queryAllAttrs(arg, args);
+    for (ATermMap::const_iterator i = args.begin(); i != args.end(); ++i)
+        subs.set(i->key, i->value);
+    
     /* Get the formal arguments. */
+    ATermVector defsUsed;
+    ATermList recAttrs = ATempty;
     for (ATermIterator i(formals); i; ++i) {
         Expr name, def;
-        if (matchNoDefFormal(*i, name))
-            subs.set(name, undefined);
-        else if (matchDefFormal(*i, name, def))
-            subs.set(name, def);
-        else abort(); /* can't happen */
+        ValidValues valids2;
+        DefaultValue def2;
+        if (!matchFormal(*i, name, valids2, def2)) abort(); /* can't happen */
+
+        Expr value = subs[name];
+        
+        if (value == 0) {
+            if (!matchDefaultValue(def2, def)) def = 0;
+            if (def == 0) throw TypeError(format("the argument named `%1%' required by the function is missing")
+                % aterm2String(name));
+            value = def;
+            defsUsed.push_back(name);
+            recAttrs = ATinsert(recAttrs, makeBind(name, def, makeNoPos()));
+        }
+
+        ATermList valids;
+        if (matchValidValues(valids2, valids)) {
+            value = evalExpr(state, value);
+            bool found = false;
+            for (ATermIterator j(valids); j; ++j) {
+                Expr v = evalExpr(state, *j);
+                if (value == v) {
+                    found = true;
+                    break;
+                }
+            }
+            if (!found) throw TypeError(format("the argument named `%1%' has an illegal value")
+                % aterm2String(name));            
+        }
     }
 
-    /* Get the actual arguments, and check that they match with the
-       formals. */
-    ATermMap args;
-    queryAllAttrs(arg, args);
-    for (ATermIterator i(args.keys()); i; ++i) {
-        Expr key = *i;
-        Expr cur = subs.get(key);
-        if (!cur)
-            throw Error(format("unexpected function argument `%1%'")
-                % aterm2String(key));
-        subs.set(key, args.get(key));
+    /* Make a recursive attribute set out of the (argument-name,
+       value) tuples.  This is so that we can support default
+       parameters that refer to each other, e.g.  ({x, y ? x + x}: y)
+       {x = "foo";} evaluates to "foofoo". */
+    if (defsUsed.size() != 0) {
+        for (ATermMap::const_iterator i = args.begin(); i != args.end(); ++i)
+            recAttrs = ATinsert(recAttrs, makeBind(i->key, i->value, makeNoPos()));
+        Expr rec = makeRec(recAttrs, ATempty);
+        for (ATermVector::iterator i = defsUsed.begin(); i != defsUsed.end(); ++i)
+            subs.set(*i, makeSelect(rec, *i));
     }
-
-    /* Check that all arguments are defined. */
-    for (ATermIterator i(subs.keys()); i; ++i)
-        if (subs.get(*i) == undefined)
-            throw Error(format("required function argument `%1%' missing")
-                % aterm2String(*i));
     
-    return substitute(subs, body);
+    if (subs.size() != nrFormals) {
+        /* One or more actual arguments were not declared as formal
+           arguments.  Find out which. */
+        for (ATermIterator i(formals); i; ++i) {
+            Expr name; ATerm d1, d2;
+            if (!matchFormal(*i, name, d1, d2)) abort();
+            subs.remove(name);
+        }
+        throw TypeError(format("the function does not expect an argument named `%1%'")
+            % aterm2String(subs.begin()->key));
+    }
+
+    return substitute(Substitution(0, &subs), body);
 }
 
 
@@ -74,7 +116,7 @@ ATerm expandRec(ATerm e, ATermList rbnds, ATermList nrbnds)
     Pos pos;
 
     /* Create the substitution list. */
-    ATermMap subs;
+    ATermMap subs(ATgetLength(rbnds) + ATgetLength(nrbnds));
     for (ATermIterator i(rbnds); i; ++i) {
         if (!matchBind(*i, name, e2, pos)) abort(); /* can't happen */
         subs.set(name, makeSelect(e, name));
@@ -84,11 +126,13 @@ ATerm expandRec(ATerm e, ATermList rbnds, ATermList nrbnds)
         subs.set(name, e2);
     }
 
+    Substitution subs_(0, &subs);
+
     /* Create the non-recursive set. */
-    ATermMap as;
+    ATermMap as(ATgetLength(rbnds) + ATgetLength(nrbnds));
     for (ATermIterator i(rbnds); i; ++i) {
         if (!matchBind(*i, name, e2, pos)) abort(); /* can't happen */
-        as.set(name, makeAttrRHS(substitute(subs, e2), pos));
+        as.set(name, makeAttrRHS(substitute(subs_, e2), pos));
     }
 
     /* Copy the non-recursive bindings.  !!! inefficient */
@@ -105,7 +149,7 @@ static Expr updateAttrs(Expr e1, Expr e2)
 {
     /* Note: e1 and e2 should be in normal form. */
 
-    ATermMap attrs;
+    ATermMap attrs(128); /* !!! */
     queryAllAttrs(e1, attrs, true);
     queryAllAttrs(e2, attrs, true);
 
@@ -117,7 +161,8 @@ string evalString(EvalState & state, Expr e)
 {
     e = evalExpr(state, e);
     ATerm s;
-    if (!matchStr(e, s)) throw Error("string expected");
+    if (!matchStr(e, s))
+        throw TypeError(format("value is %1% while a string was expected") % showType(e));
     return aterm2String(s);
 }
 
@@ -126,17 +171,165 @@ Path evalPath(EvalState & state, Expr e)
 {
     e = evalExpr(state, e);
     ATerm s;
-    if (!matchPath(e, s)) throw Error("path expected");
+    if (!matchPath(e, s))
+        throw TypeError(format("value is %1% while a path was expected") % showType(e));
     return aterm2String(s);
 }
 
 
+int evalInt(EvalState & state, Expr e)
+{
+    e = evalExpr(state, e);
+    int i;
+    if (!matchInt(e, i))
+        throw TypeError(format("value is %1% while an integer was expected") % showType(e));
+    return i;
+}
+
+
 bool evalBool(EvalState & state, Expr e)
 {
     e = evalExpr(state, e);
     if (e == eTrue) return true;
     else if (e == eFalse) return false;
-    else throw Error("boolean expected");
+    else throw TypeError(format("value is %1% while a boolean was expected") % showType(e));
+}
+
+
+ATermList evalList(EvalState & state, Expr e)
+{
+    e = evalExpr(state, e);
+    ATermList list;
+    if (!matchList(e, list))
+        throw TypeError(format("value is %1% while a list was expected") % showType(e));
+    return list;
+}
+
+
+/* String concatenation and context nodes: in order to allow users to
+   write things like
+
+     "--with-freetype2-library=" + freetype + "/lib"
+
+   where `freetype' is a derivation, we automatically coerce
+   derivations into their output path (e.g.,
+   /nix/store/hashcode-freetype) in concatenations.  However, if we do
+   this naively, we could introduce an undeclared dependency: when the
+   string is used in another derivation, that derivation would not
+   have an explicitly dependency on `freetype' in its inputDrvs
+   field.  Thus `freetype' would not necessarily be built.
+
+   To prevent this, we wrap the string resulting from the
+   concatenation in a *context node*, like this:
+
+     Context([freetype],
+       Str("--with-freetype2-library=/nix/store/hashcode-freetype/lib"))
+
+   Thus the context is the list of all derivations used in the
+   computation of a value.  These contexts are propagated through
+   further concatenations.  In processBinding() in primops.cc, context
+   nodes are unwrapped and added to inputDrvs.
+
+   !!! Should the ordering of the context list have a canonical form?
+
+   !!! Contexts are not currently recognised in most places in the
+   evaluator. */
+
+
+/* Coerce a value to a string, keeping track of contexts. */
+string coerceToStringWithContext(EvalState & state,
+    ATermList & context, Expr e, bool & isPath)
+{
+    isPath = false;
+    
+    e = evalExpr(state, e);
+
+    ATermList es;
+    ATerm e2;
+    if (matchContext(e, es, e2)) {
+        e = e2;
+        context = ATconcat(es, context);
+    }
+    
+    ATerm s;
+    if (matchStr(e, s) || matchUri(e, s))
+        return aterm2String(s);
+    
+    if (matchPath(e, s)) {
+        isPath = true;
+        Path path = aterm2String(s);
+        if (isInStore(path)) {
+            context = ATinsert(context, makePath(toATerm(toStorePath(path))));
+        }
+        return path;
+    }
+
+    if (matchAttrs(e, es)) {
+        ATermMap attrs(128); /* !!! */
+        queryAllAttrs(e, attrs, false);
+
+        Expr a = attrs.get(toATerm("type"));
+        if (a && evalString(state, a) == "derivation") {
+            a = attrs.get(toATerm("outPath"));
+            if (!a) throw TypeError("output path missing from derivation");
+            isPath = true;
+            context = ATinsert(context, e);
+            return evalPath(state, a);
+        }
+    }
+    
+    throw TypeError(format("cannot coerce %1% to a string") % showType(e));
+}
+
+
+/* Wrap an expression in a context if the context is not empty. */
+Expr wrapInContext(ATermList context, Expr e)
+{
+    return context == ATempty ? e : makeContext(context, e);
+}
+
+
+static ATerm concatStrings(EvalState & state, const ATermVector & args)
+{
+    ATermList context = ATempty;
+    std::ostringstream s;
+    bool isPath = false;
+
+    for (ATermVector::const_iterator i = args.begin(); i != args.end(); ++i) {
+        bool isPath2;
+        s << coerceToStringWithContext(state, context, *i, isPath2);
+        if (i == args.begin()) isPath = isPath2;
+    }
+
+    Expr result = isPath
+        ? makePath(toATerm(canonPath(s.str())))
+        : makeStr(toATerm(s.str()));
+    return wrapInContext(context, result);
+}
+
+
+Expr autoCallFunction(Expr e, const ATermMap & args)
+{
+    ATermList formals;
+    ATerm body, pos;
+    
+    if (matchFunction(e, formals, body, pos)) {
+        ATermMap actualArgs(128);
+        
+        for (ATermIterator i(formals); i; ++i) {
+            Expr name, def, value; ATerm values, def2;
+            if (!matchFormal(*i, name, values, def2)) abort();
+            if ((value = args.get(name)))
+                actualArgs.set(name, makeAttrRHS(value, makeNoPos()));
+            else if (!matchDefaultValue(def2, def))
+                throw TypeError(format("cannot auto-call a function that has an argument without a default value (`%1%')")
+                    % aterm2String(name));
+        }
+        
+        e = makeCall(e, makeAttrs(actualArgs));
+    }
+    
+    return e;
 }
 
 
@@ -149,7 +342,6 @@ Expr evalExpr2(EvalState & state, Expr e)
     /* Normal forms. */
     if (sym == symStr ||
         sym == symPath ||
-        sym == symSubPath ||
         sym == symUri ||
         sym == symNull ||
         sym == symInt ||
@@ -158,7 +350,8 @@ Expr evalExpr2(EvalState & state, Expr e)
         sym == symFunction1 ||
         sym == symAttrs ||
         sym == symList ||
-        sym == symPrimOp)
+        sym == symPrimOp ||
+        sym == symContext)
         return e;
     
     /* The `Closed' constructor is just a way to prevent substitutions
@@ -171,7 +364,7 @@ Expr evalExpr2(EvalState & state, Expr e)
     if (matchVar(e, name)) {
         ATerm primOp = state.primOps.get(name);
         if (!primOp)
-            throw Error(format("impossible: undefined variable `%1%'") % name);
+            throw EvalError(format("impossible: undefined variable `%1%'") % aterm2String(name));
         int arity;
         ATermBlob fun;
         if (!matchPrimOpDef(primOp, arity, fun)) abort();
@@ -212,25 +405,29 @@ Expr evalExpr2(EvalState & state, Expr e)
         else if (matchFunction(e1, formals, e4, pos)) {
             e2 = evalExpr(state, e2);
             try {
-                return evalExpr(state, substArgs(e4, formals, e2));
+                return evalExpr(state, substArgs(state, e4, formals, e2));
             } catch (Error & e) {
-                throw Error(format("while evaluating the function at %1%:\n%2%")
-                    % showPos(pos) % e.msg());
+                e.addPrefix(format("while evaluating the function at %1%:\n")
+                    % showPos(pos));
+                throw;
             }
         }
         
         else if (matchFunction1(e1, name, e4, pos)) {
             try {
-                ATermMap subs;
+                ATermMap subs(1);
                 subs.set(name, e2);
-                return evalExpr(state, substitute(subs, e4));
+                return evalExpr(state, substitute(Substitution(0, &subs), e4));
             } catch (Error & e) {
-                throw Error(format("while evaluating the function at %1%:\n%2%")
-                    % showPos(pos) % e.msg());
+                e.addPrefix(format("while evaluating the function at %1%:\n")
+                    % showPos(pos));
+                throw;
             }
         }
         
-        else throw Error("function or primop expected in function call");
+        else throw TypeError(
+            format("the left-hand side of the function call is neither a function nor a primop (built-in operation) but %1%")
+            % showType(e1));
     }
 
     /* Attribute selection. */
@@ -238,12 +435,13 @@ Expr evalExpr2(EvalState & state, Expr e)
         ATerm pos;
         string s1 = aterm2String(name);
         Expr a = queryAttr(evalExpr(state, e1), s1, pos);
-        if (!a) throw Error(format("attribute `%1%' missing") % s1);
+        if (!a) throw EvalError(format("attribute `%1%' missing") % s1);
         try {
             return evalExpr(state, a);
         } catch (Error & e) {
-            throw Error(format("while evaluating the attribute `%1%' at %2%:\n%3%")
-                % s1 % showPos(pos) % e.msg());
+            e.addPrefix(format("while evaluating the attribute `%1%' at %2%:\n")
+                % s1 % showPos(pos));
+            throw;
         }
     }
 
@@ -263,35 +461,41 @@ Expr evalExpr2(EvalState & state, Expr e)
     /* Assertions. */
     if (matchAssert(e, e1, e2, pos)) {
         if (!evalBool(state, e1))
-            throw Error(format("assertion failed at %1%") % showPos(pos));
+            throw AssertionError(format("assertion failed at %1%") % showPos(pos));
         return evalExpr(state, e2);
     }
 
     /* Withs. */
     if (matchWith(e, e1, e2, pos)) {
-        ATermMap attrs;
+        ATermMap attrs(128); /* !!! */
         try {
             e1 = evalExpr(state, e1);
             queryAllAttrs(e1, attrs);
         } catch (Error & e) {
-            throw Error(format("while evaluating the `with' definitions at %1%:\n%2%")
-                % showPos(pos) % e.msg());
+            e.addPrefix(format("while evaluating the `with' definitions at %1%:\n")
+                % showPos(pos));
+            throw;
         }
         try {
-            e2 = substitute(attrs, e2);
+            e2 = substitute(Substitution(0, &attrs), e2);
             checkVarDefs(state.primOps, e2);
             return evalExpr(state, e2);
         } catch (Error & e) {
-            throw Error(format("while evaluating the `with' body at %1%:\n%2%")
-                % showPos(pos) % e.msg());
+            e.addPrefix(format("while evaluating the `with' body at %1%:\n")
+                % showPos(pos));
+            throw;
         } 
     }
 
-    /* Generic equality. */
+    /* Generic equality/inequality.  Note that the behaviour on
+       composite data (lists, attribute sets) and functions is
+       undefined, since the subterms of those terms are not evaluated.
+       However, we don't want to make (==) strict, because that would
+       make operations like `big_derivation == null' very slow (unless
+       we were to evaluate them side-by-side). */
     if (matchOpEq(e, e1, e2))
         return makeBool(evalExpr(state, e1) == evalExpr(state, e2));
 
-    /* Generic inequality. */
     if (matchOpNEq(e, e1, e2))
         return makeBool(evalExpr(state, e1) != evalExpr(state, e2));
 
@@ -317,23 +521,50 @@ Expr evalExpr2(EvalState & state, Expr e)
 
     /* Attribute existence test (?). */
     if (matchOpHasAttr(e, e1, name)) {
-        ATermMap attrs;
+        ATermMap attrs(128); /* !!! */
         queryAllAttrs(evalExpr(state, e1), attrs);
         return makeBool(attrs.get(name) != 0);
     }
 
     /* String or path concatenation. */
-    if (matchOpPlus(e, e1, e2)) {
-        e1 = evalExpr(state, e1);
-        e2 = evalExpr(state, e2);
-        ATerm s1, s2;
-        if (matchStr(e1, s1) && matchStr(e2, s2))
-            return makeStr(toATerm(
-                (string) aterm2String(s1) + (string) aterm2String(s2)));
-        else if (matchPath(e1, s1) && matchPath(e2, s2))
-            return makePath(toATerm(canonPath(
-                (string) aterm2String(s1) + "/" + (string) aterm2String(s2))));
-        else throw Error("wrong argument types in `+' operator");
+    ATermList es = ATempty;
+    if (matchOpPlus(e, e1, e2) || matchConcatStrings(e, es)) {
+        ATermVector args;
+        if (matchOpPlus(e, e1, e2)) {
+            args.push_back(e1);
+            args.push_back(e2);
+        } else
+            for (ATermIterator i(es); i; ++i) args.push_back(*i);
+        
+        try {
+            return concatStrings(state, args);
+        } catch (Error & e) {
+            e.addPrefix(format("in a string concatenation:\n"));
+            throw;
+        }
+    }
+
+    /* Backwards compatability: subpath operator (~). */
+    if (matchSubPath(e, e1, e2)) {
+        static bool haveWarned = false;
+        warnOnce(haveWarned, "the subpath operator (~) is deprecated, use string concatenation (+) instead");
+        ATermList context = ATempty;
+        bool dummy;
+        string s1 = coerceToStringWithContext(state, context, e1, dummy);
+        string s2 = coerceToStringWithContext(state, context, e2, dummy);
+        return wrapInContext(context, makePath(toATerm(canonPath(s1 + "/" + s2))));
+    }
+
+    /* List concatenation. */
+    if (matchOpConcat(e, e1, e2)) {
+        try {
+            ATermList l1 = evalList(state, e1);
+            ATermList l2 = evalList(state, e2);
+            return makeList(ATconcat(l1, l2));
+        } catch (Error & e) {
+            e.addPrefix(format("in a list concatenation:\n"));
+            throw;
+        }
     }
 
     /* Barf. */
@@ -354,15 +585,21 @@ Expr evalExpr(EvalState & state, Expr e)
        previously evaluated expressions. */
     Expr nf = state.normalForms.get(e);
     if (nf) {
-        if (nf == state.blackHole)
-            throw Error("infinite recursion encountered");
+        if (nf == makeBlackHole())
+            throw EvalError("infinite recursion encountered");
         state.nrCached++;
         return nf;
     }
 
     /* Otherwise, evaluate and memoize. */
-    state.normalForms.set(e, state.blackHole);
-    nf = evalExpr2(state, e);
+    state.normalForms.set(e, makeBlackHole());
+    try {
+        nf = evalExpr2(state, e);
+    } catch (Error & err) {
+        debug("removing black hole");
+        state.normalForms.remove(e);
+        throw;
+    }
     state.normalForms.set(e, nf);
     return nf;
 }
@@ -375,15 +612,81 @@ Expr evalFile(EvalState & state, const Path & path)
     try {
         return evalExpr(state, e);
     } catch (Error & e) {
-        throw Error(format("while evaluating the file `%1%':\n%2%")
-            % path % e.msg());
+        e.addPrefix(format("while evaluating the file `%1%':\n")
+            % path);
+        throw;
     }
 }
 
 
+Expr strictEvalExpr(EvalState & state, Expr e, bool canonicalise)
+{
+    e = evalExpr(state, e);
+
+    ATermList as;
+    if (matchAttrs(e, as)) {
+        ATermList as2 = ATempty;
+        for (ATermIterator i(as); i; ++i) {
+            ATerm name; Expr e; ATerm pos;
+            if (!matchBind(*i, name, e, pos)) abort(); /* can't happen */
+            as2 = ATinsert(as2, makeBind(name, strictEvalExpr(state, e, canonicalise),
+                               canonicalise ? makeNoPos() : pos));
+        }
+        /* !!! sort attributes if canonicalise == true */
+        return makeAttrs(ATreverse(as2));
+    }
+    
+    ATermList es;
+    if (matchList(e, es)) {
+        ATermList es2 = ATempty;
+        for (ATermIterator i(es); i; ++i)
+            es2 = ATinsert(es2, strictEvalExpr(state, *i, canonicalise));
+        return makeList(ATreverse(es2));
+    }
+    
+    ATermList formals;
+    ATerm body, pos;
+    if (matchFunction(e, formals, body, pos)) {
+        ATermList formals2 = ATempty;
+        
+        for (ATermIterator i(formals); i; ++i) {
+            Expr name; ValidValues valids; ATerm dummy;
+            if (!matchFormal(*i, name, valids, dummy)) abort();
+
+            ATermList valids2;
+            if (matchValidValues(valids, valids2)) {
+                ATermList valids3 = ATempty;
+                for (ATermIterator j(valids2); j; ++j)
+                    valids3 = ATinsert(valids3, strictEvalExpr(state, *j, canonicalise));
+                valids = makeValidValues(ATreverse(valids3));
+            }
+
+            formals2 = ATinsert(formals2, makeFormal(name, valids, dummy));
+        }
+        return makeFunction(ATreverse(formals2), body,
+            canonicalise ? makeNoPos() : pos);
+    }
+    
+    return e;
+}
+
+
+/* Yes, this is a really bad idea... */
+extern "C" {
+    unsigned long AT_calcAllocatedSize();
+}
+
 void printEvalStats(EvalState & state)
 {
-    debug(format("evaluated %1% expressions, %2% cache hits, %3%%% efficiency")
+    bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0";
+    printMsg(showStats ? lvlInfo : lvlDebug,
+        format("evaluated %1% expressions, %2% cache hits, %3%%% efficiency, used %4% ATerm bytes")
         % state.nrEvaluated % state.nrCached
-        % ((float) state.nrCached / (float) state.nrEvaluated * 100));
+        % ((float) state.nrCached / (float) state.nrEvaluated * 100)
+        % AT_calcAllocatedSize());
+    if (showStats)
+        printATermMapStats();
+}
+
+ 
 }

src/libexpr/eval.hh

@@ -4,12 +4,21 @@
 #include <map>
 
 #include "aterm.hh"
-#include "hash.hh"
 #include "nixexpr.hh"
 
 
-typedef map<Path, PathSet> DrvRoots;
-typedef map<Path, Hash> DrvHashes;
+namespace nix {
+
+
+class Hash;
+    
+
+typedef std::map<Path, PathSet> DrvRoots;
+typedef std::map<Path, Hash> DrvHashes;
+
+/* Cache for calls to addToStore(); maps source paths to the store
+   paths. */
+typedef std::map<Path, Path> SrcToStore;
 
 struct EvalState;
 
@@ -24,7 +33,7 @@ struct EvalState
     ATermMap primOps;
     DrvRoots drvRoots;
     DrvHashes drvHashes; /* normalised derivation hashes */
-    Expr blackHole;
+    SrcToStore srcToStore; 
 
     unsigned int nrEvaluated;
     unsigned int nrCached;
@@ -43,12 +52,36 @@ Expr evalExpr(EvalState & state, Expr e);
 /* Evaluate an expression read from the given file to normal form. */
 Expr evalFile(EvalState & state, const Path & path);
 
+/* Evaluate an expression, and recursively evaluate list elements and
+   attributes.  If `canonicalise' is true, we remove things like
+   position information and make sure that attribute sets are in
+   sorded order. */
+Expr strictEvalExpr(EvalState & state, Expr e,
+    bool canonicalise = false);
+
 /* Specific results. */
 string evalString(EvalState & state, Expr e);
 Path evalPath(EvalState & state, Expr e);
+int evalInt(EvalState & state, Expr e);
+bool evalBool(EvalState & state, Expr e);
+ATermList evalList(EvalState & state, Expr e);
+ATerm coerceToString(Expr e);
+
+/* Contexts. */
+string coerceToStringWithContext(EvalState & state,
+    ATermList & context, Expr e, bool & isPath);
+Expr wrapInContext(ATermList context, Expr e);
+
+/* Automatically call a function for which each argument has a default
+   value or has a binding in the `args' map.  Note: result is a call,
+   not a normal form; it should be evaluated by calling evalExpr(). */
+Expr autoCallFunction(Expr e, const ATermMap & args);
 
 /* Print statistics. */
 void printEvalStats(EvalState & state);
 
+ 
+}
+
 
 #endif /* !__EVAL_H */

src/libexpr/expr-to-xml.cc

@@ -0,0 +1,104 @@
+#include "expr-to-xml.hh"
+#include "xml-writer.hh"
+#include "nixexpr-ast.hh"
+#include "aterm.hh"
+
+
+namespace nix {
+
+    
+static XMLAttrs singletonAttrs(const string & name, const string & value)
+{
+    XMLAttrs attrs;
+    attrs[name] = value;
+    return attrs;
+}
+
+
+static void printTermAsXML(Expr e, XMLWriter & doc, ATermList & context)
+{
+    XMLAttrs attrs;
+    ATerm s;
+    int i;
+    Expr e2;
+    ATermList as, es, formals;
+    ATerm body, pos;
+
+    while (matchContext(e, es, e2)) {
+        e = e2;
+        for (ATermIterator i(es); i; ++i)
+            context = ATinsert(context, *i);
+    }
+
+    if (matchStr(e, s))
+        doc.writeEmptyElement("string", singletonAttrs("value", aterm2String(s)));
+
+    else if (matchPath(e, s))
+        doc.writeEmptyElement("path", singletonAttrs("value", aterm2String(s)));
+
+    else if (matchUri(e, s))
+        doc.writeEmptyElement("uri", singletonAttrs("value", aterm2String(s)));
+
+    else if (matchNull(e))
+        doc.writeEmptyElement("null");
+
+    else if (matchInt(e, i))
+        doc.writeEmptyElement("int", singletonAttrs("value", (format("%1%") % i).str()));
+
+    else if (e == eTrue)
+        doc.writeEmptyElement("bool", singletonAttrs("value", "true"));
+
+    else if (e == eFalse)
+        doc.writeEmptyElement("bool", singletonAttrs("value", "false"));
+
+    else if (matchAttrs(e, as)) {
+        XMLOpenElement _(doc, "attrs");
+        ATermMap attrs(128);
+        queryAllAttrs(e, attrs);
+        StringSet names;
+        for (ATermMap::const_iterator i = attrs.begin(); i != attrs.end(); ++i)
+            names.insert(aterm2String(i->key));
+        for (StringSet::iterator i = names.begin(); i != names.end(); ++i) {
+            XMLOpenElement _(doc, "attr", singletonAttrs("name", *i));
+            printTermAsXML(attrs.get(toATerm(*i)), doc, context);
+        }
+    }
+
+    else if (matchList(e, es)) {
+        XMLOpenElement _(doc, "list");
+        for (ATermIterator i(es); i; ++i)
+            printTermAsXML(*i, doc, context);
+    }
+
+    else if (matchFunction(e, formals, body, pos)) {
+        XMLOpenElement _(doc, "function");
+        
+        for (ATermIterator i(formals); i; ++i) {
+            Expr name; ValidValues valids; ATerm dummy;
+            if (!matchFormal(*i, name, valids, dummy)) abort();
+            XMLOpenElement _(doc, "arg", singletonAttrs("name", aterm2String(name)));
+
+            ATermList valids2;
+            if (matchValidValues(valids, valids2)) {
+                for (ATermIterator j(valids2); j; ++j) {
+                    XMLOpenElement _(doc, "value");
+                    printTermAsXML(*j, doc, context);
+                }
+            }
+        }
+    }
+
+    else
+        doc.writeEmptyElement("unevaluated");
+}
+
+
+void printTermAsXML(Expr e, std::ostream & out, ATermList & context)
+{
+    XMLWriter doc(true, out);
+    XMLOpenElement root(doc, "expr");
+    printTermAsXML(e, doc, context);
+}
+
+ 
+}