nixpkgs/pkgs/development/interpreters/python/wrapper.nix
Frederik Rietdijk 40851a4d26 Python: the pythonModule attribute
Python libraries or modules now have an attribute `pythonModule = interpreter;` to indicate
they provide Python modules for the specified `interpreter`.

The package set provides the following helper functions:

- hasPythonModule: Check whether a derivation provides a Python module.
- requiredPythonModules: Recurse into a list of Python modules, returning all Python modules that are required.
- makePythonPath: Create a PYTHONPATH from a list of Python modules.

Also included in this commit is:
- disabledIf: Helper function for disabling non-buildPythonPackage functions.
2017-11-23 15:11:02 +01:00

61 lines
1.5 KiB
Nix

{ stdenv, python, buildEnv, makeWrapper
, extraLibs ? []
, extraOutputsToInstall ? []
, postBuild ? ""
, ignoreCollisions ? false
, requiredPythonModules
, }:
# Create a python executable that knows about additional packages.
let
env = let
paths = requiredPythonModules (extraLibs ++ [ python ] ) ;
in buildEnv {
name = "${python.name}-env";
inherit paths;
inherit ignoreCollisions extraOutputsToInstall;
postBuild = ''
. "${makeWrapper}/nix-support/setup-hook"
if [ -L "$out/bin" ]; then
unlink "$out/bin"
fi
mkdir -p "$out/bin"
for path in ${stdenv.lib.concatStringsSep " " paths}; do
if [ -d "$path/bin" ]; then
cd "$path/bin"
for prg in *; do
if [ -f "$prg" ]; then
rm -f "$out/bin/$prg"
if [ -x "$prg" ]; then
makeWrapper "$path/bin/$prg" "$out/bin/$prg" --set PYTHONHOME "$out" --set PYTHONNOUSERSITE "true"
fi
fi
done
fi
done
'' + postBuild;
inherit (python) meta;
passthru = python.passthru // {
interpreter = "${env}/bin/${python.executable}";
inherit python;
env = stdenv.mkDerivation {
name = "interactive-${python.name}-environment";
nativeBuildInputs = [ env ];
buildCommand = ''
echo >&2 ""
echo >&2 "*** Python 'env' attributes are intended for interactive nix-shell sessions, not for building! ***"
echo >&2 ""
exit 1
'';
};
};
};
in env