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python: remove _manylinux.py

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This will turn manylinux support back on by default.

PIP will now do runtime checks against the compatible glibc version to
determine if the current interpreter is compatible with a given
manylinux specification. However it will not check if any of the
required libraries are present.

The motivation here is that we want to support building python packages
with wheels that require manylinux support. There is no real change for
users of source builds as they are still buildings packages from source.

The real noticeable(?) change is that impure usages (e.g. running `pip
install package`) will install manylinux packages that previously
refused to install.
Previously we did claim that we were not compatible with manylinux and
thus they wouldn't be installed at all.

Now impure users will have basically the same situation as before: If
you require some wheel only package it didn't work before and will not
properly work now. Now the program will fail during runtime vs during
installation time.

I think it is a reasonable trade-off since it allows us to install
manylinux packages with nix expressions and enables tools like
poetry2nix.

This should be a net win for users as it allows wheels, that we
previously couldn't really support, to be used.
This commit is contained in:
Andreas Rammhold 2019-12-16 16:22:21 +01:00
parent 3e046ee556
commit e9f522eee1
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GPG Key ID: E432E410B5E48C86
3 changed files with 0 additions and 9 deletions
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3
pkgs/development/interpreters/python/cpython/2.7/default.nix
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@ -234,9 +234,6 @@ in with passthru; stdenv.mkDerivation ({
ln -s $out/lib/${libPrefix}/pdb.py $out/bin/pdb${sourceVersion.major}.${sourceVersion.minor}
ln -s $out/share/man/man1/{python2.7.1.gz,python.1.gz}
# Python on Nix is not manylinux1 compatible. https://github.com/NixOS/nixpkgs/issues/18484
echo "manylinux1_compatible=False" >> $out/lib/${libPrefix}/_manylinux.py
rm "$out"/lib/python*/plat-*/regen # refers to glibc.dev
# Determinism: Windows installers were not deterministic.

3
pkgs/development/interpreters/python/cpython/default.nix
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@ -208,9 +208,6 @@ in with passthru; stdenv.mkDerivation {
ln -s "$out/include/${executable}m" "$out/include/${executable}"
# Python on Nix is not manylinux1 compatible. https://github.com/NixOS/nixpkgs/issues/18484
echo "manylinux1_compatible=False" >> $out/lib/${libPrefix}/_manylinux.py
# Determinism: Windows installers were not deterministic.
# We're also not interested in building Windows installers.
find "$out" -name 'wininst*.exe' | xargs -r rm -f

3
pkgs/development/interpreters/python/pypy/default.nix
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@ -137,9 +137,6 @@ in with passthru; stdenv.mkDerivation rec {
# verify cffi modules
$out/bin/${executable} -c ${if isPy3k then "'import tkinter;import sqlite3;import curses;import lzma'" else "'import Tkinter;import sqlite3;import curses'"}
# Python on Nix is not manylinux1 compatible. https://github.com/NixOS/nixpkgs/issues/18484
echo "manylinux1_compatible=False" >> $out/lib/${libPrefix}/_manylinux.py
# Include a sitecustomize.py file
cp ${../sitecustomize.py} $out/lib/${libPrefix}/${sitePackages}/sitecustomize.py
'';