Bug#1035546: python3-pip: pip install ignores explicit --prefix=/usr (even with --root)
Control: forwarded -1 https://github.com/pypa/pip/issues/10978
Hi Martin (2023.05.05_13:03:43_+0200)
> I also tried --prefix=/opt which then gets me /opt/local/{bin,lib}. So this
> behaviour directly contradicts the --help documentation:
...
> So this "/local" thing is both sticky and hard to avoid..
Yeah, the cause of this is our posix_local sysconfig scheme.
Ideally pip should have a --scheme argument. At least in Debian, where
we have multiple schemes interacting with each other, that could make
sense.
Or pip could use some knowledge of Debian's schemes to select
posix_prefix / posix_local as appropriate...
This all gets messy, I'm afraid.
Stefano
--
Stefano Rivera
http://tumbleweed.org.za/
+1 415 683 3272
Bug#1035546: python3-pip: pip install ignores explicit --prefix=/usr (even with --root)
Hello again,
I just locally reverted [1], and it's still the same, so that Debian patch
actually isn't to blame.
I also tried --prefix=/opt which then gets me /opt/local/{bin,lib}. So this
behaviour directly contradicts the --help documentation:
> --prefix Installation prefix where lib, bin and other
> top-level folders are placed
It's also not about my local wheel --
rm -rf /tmp/i; python3 -m pip install --root=/tmp/i --prefix=/opt
small-timer
find /tmp/i
again gives /tmp/i/opt/local/lib/python3.11/dist-packages/small_timer
So this "/local" thing is both sticky and hard to avoid..
Martin
[1]
https://salsa.debian.org/python-team/packages/python-pip/-/blob/master/debian/patches/hands-off-system-packages.patch
Bug#1035546: python3-pip: pip install ignores explicit --prefix=/usr (even with --root)
Hello all, Is that patch even necessary still? In Fedora with python3-pip 2.22.3, `sudo pip install python-dbusmock` installs into /usr/local/lib/python3.11/site-packages/dbusmock/ , i.e. does not conflict with /usr any more. They do have a more targetted protection of /usr [1], but no general path mangling in their other patches [2]. Thanks, Martin [1] https://src.fedoraproject.org/rpms/python-pip/blob/rawhide/f/remove-existing-dist-only-if-path-conflicts.patch [2] https://src.fedoraproject.org/rpms/python-pip/tree/rawhide
Bug#1035546: python3-pip: pip install ignores explicit --prefix=/usr (even with --root)
Package: python3-pip Version: 23.0.1+dfsg-1 My upstream project (cockpit) is soon going to deliver a new Python component, where it installs a locally built wheel (i.e. some Python packages and auto-generated executable wrappers) with python3 -m pip install --no-index --force-reinstall --root='$(DESTDIR)/' --prefix='$(prefix)' tmp/pybuild/dist/*.whl This works fine on Fedora, but not on Debian: rm -rf /tmp/i python3 -m pip install --no-index --force-reinstall --root=/tmp/i --prefix=/usr tmp/pybuild/dist/*.whl find /tmp/i This shows that everything gets installed into /tmp/i/usr/local , i.e. /bin, lib/python3.11, etc. I'm quite sure this is somehow related to the Debian magic of not installing into /usr [1][2], but this is happening during *building* a Debian package, with --root. It seems to me that (1) explicitly specifying --prefix=/usr should still be respected, and not silently be changed to /usr/local (as a *default*, /usr/local/ is fine of course). And (2) perhaps this change shouldn't be applied with --root? Do you know a workaround for this? I can't simply move debian/tmp/usr/local/* to debian/tmp/usr/, as the upstream build system already assumes that a wheel binary lands in DESTDIR/usr/bin/, i.e. `make install` is just broken. Thanks, Martin [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=771794 [2] https://salsa.debian.org/python-team/packages/python-pip/-/blob/master/debian/patches/hands-off-system-packages.patch
