During the build create a temporary config file in makepkg.conf.d
which changes some defaults.
For starters this sets the zstd compression, and bumps it for source
builds.
This allows us to make the default zstd config faster, while compressing
with a higher level in autobuild.
git clean can't deal with junctions and in case there is a loop
it follows them forever (or until stack overflow).
https://github.com/git-for-windows/git/issues/5320
To work around this try to delete all junctions in the clean
re-try code path.
Fixes#108
As found out here, os.walk() by default follows junctions, which we don't
want and can even lead to loops:
https://github.com/msys2/msys2-autobuild/issues/101#issuecomment-2583121845
Integrate the workaround mentioned in the CPython bug report:
https://github.com/python/cpython/issues/67596#issuecomment-1918112817
Since this is Python 3.12+ only and we still support 3.10 make
it optional though.
This also adds tests, which uncovered some other minor issues:
It was not chmoding top-down, which meant that os.walk would
skip things if there were no read permissions. So chmod before
os.walk() lists the dir.
For example it failed with:
warning: failed to remove B/mingw-w64-clang-i686-seacas-2023.02.03-2-any.pkg.tar.zst: Invalid argument
We now always use the same build directory, so if files can't be removed
we fail. Retry git clean/reset a few times before giving up and also
try before we start so in case it is fixed while the job isn't running on
a self-hosted runner we can continue automatically.
