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Python: introduce NIX_PYTHONEXECUTABLE in order to set sys.executable

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This is needed in case of `python.buildEnv` to make sure sys.executable
does not point to the unwrapped executable.
This commit is contained in:
Frederik Rietdijk 2019-07-27 09:30:34 +02:00 committed by Frederik Rietdijk
parent c9793b81b8
commit bd47c5721f
2 changed files with 10 additions and 1 deletions
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8
pkgs/development/interpreters/python/sitecustomize.py
View File

@ -8,11 +8,19 @@ The paths listed in `PYTHONPATH` are added to `sys.path` afterwards, but they
will be added before the entries we add here and thus take precedence.
Note the `NIX_PYTHONPATH` environment variable is unset in order to prevent leakage.
Similarly, this module listens to the environment variable `NIX_PYTHONEXECUTABLE`
and sets `sys.executable` to its value.
"""
import site
import sys
import os
import functools
paths = os.environ.pop('NIX_PYTHONPATH', None)
if paths:
functools.reduce(lambda k, p: site.addsitedir(p, k), paths.split(':'), site._init_pathinfo())
executable = os.environ.pop('NIX_PYTHONEXECUTABLE', None)
if 'PYTHONEXECUTABLE' not in os.environ and executable:
sys.executable = executable

3
pkgs/development/interpreters/python/wrapper.nix
View File

@ -14,6 +14,7 @@ let
env = let
paths = requiredPythonModules (extraLibs ++ [ python ] ) ;
pythonPath = "${placeholder "out"}/${python.sitePackages}";
pythonExecutable = "${placeholder "out"}/bin/${python.executable}";
in buildEnv {
name = "${python.name}-env";
@ -36,7 +37,7 @@ let
if [ -f "$prg" ]; then
rm -f "$out/bin/$prg"
if [ -x "$prg" ]; then
makeWrapper "$path/bin/$prg" "$out/bin/$prg" --set NIX_PYTHONPATH ${pythonPath} ${if permitUserSite then "" else ''--set PYTHONNOUSERSITE "true"''} ${stdenv.lib.concatStringsSep " " makeWrapperArgs}
makeWrapper "$path/bin/$prg" "$out/bin/$prg" --set NIX_PYTHONEXECUTABLE ${pythonExecutable} --set NIX_PYTHONPATH ${pythonPath} ${if permitUserSite then "" else ''--set PYTHONNOUSERSITE "true"''} ${stdenv.lib.concatStringsSep " " makeWrapperArgs}
fi
fi
done