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nixpkgs/pkgs/development/python-modules/bootstrapped-pip/default.nix
Frederik Rietdijk 56727dc1ff Python: setuptools/wheel/pip now bootstrap from source
Since wheel support was introduced in 2015 we always relied on pre-built
wheels for bootstrapping. Now, we can bootstrap directly from the
sources of these packages in git.

The `bootstrapped-pip` packages is used to build `pip`, `setuptools` and `wheel`,
after which those packages are used to build everything else.

Note that when building `bootstrapped-pip` some errors are shown.
These are not important, the build actually does succeed and work as intended.
2019-10-20 19:48:00 +02:00

67 lines
2.2 KiB
Nix

{ stdenv, python, fetchPypi, makeWrapper, unzip, makeSetupHook
, pipInstallHook
, setuptoolsBuildHook
, wheel, pip, setuptools
}:
stdenv.mkDerivation rec {
pname = "pip";
inherit (pip) version;
name = "${python.libPrefix}-bootstrapped-${pname}-${version}";
srcs = [ wheel.src pip.src setuptools.src ];
sourceRoot = ".";
dontUseSetuptoolsBuild = true;
dontUsePipInstall = true;
# Should be propagatedNativeBuildInputs
propagatedBuildInputs = [
# Override to remove dependencies to prevent infinite recursion.
(pipInstallHook.override{pip=null;})
(setuptoolsBuildHook.override{setuptools=null; wheel=null;})
];
postPatch = ''
mkdir -p $out/bin
'';
nativeBuildInputs = [ makeWrapper unzip ];
buildInputs = [ python ];
buildPhase = ":";
installPhase = stdenv.lib.strings.optionalString (!stdenv.hostPlatform.isWindows) ''
export SETUPTOOLS_INSTALL_WINDOWS_SPECIFIC_FILES=0
'' + ''
# Give folders a known name
mv pip* pip
mv setuptools* setuptools
mv wheel* wheel
# Set up PYTHONPATH. The above folders need to be on PYTHONPATH
# $out is where we are installing to and takes precedence
export PYTHONPATH="$out/${python.sitePackages}:$(pwd)/pip/src:$(pwd)/setuptools:$(pwd)/setuptools/pkg_resources:$(pwd)/wheel"
echo "Building setuptools wheel..."
pushd setuptools
${python.pythonForBuild.interpreter} -m pip install --no-build-isolation --no-index --prefix=$out --ignore-installed --no-dependencies --no-cache --build tmpbuild .
popd
echo "Building wheel wheel..."
pushd wheel
${python.pythonForBuild.interpreter} -m pip install --no-build-isolation --no-index --prefix=$out --ignore-installed --no-dependencies --no-cache --build tmpbuild .
popd
echo "Building pip wheel..."
pushd pip
${python.pythonForBuild.interpreter} -m pip install --no-build-isolation --no-index --prefix=$out --ignore-installed --no-dependencies --no-cache --build tmpbuild .
popd
'';
meta = {
description = "Version of pip used for bootstrapping";
license = stdenv.lib.unique (pip.meta.license ++ setuptools.meta.license ++ wheel.meta.license);
homepage = pip.meta.homepage;
};
}