mirror of
https://github.com/NixOS/nixpkgs.git
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144 lines
4.8 KiB
Nix
144 lines
4.8 KiB
Nix
/* This function provides a generic Python package builder. It is
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intended to work with packages that use `distutils/setuptools'
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(http://pypi.python.org/pypi/setuptools/), which represents a large
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number of Python packages nowadays. */
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{ python, setuptools, wrapPython, lib, recursivePthLoader, distutils-cfg }:
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{ name
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# by default prefix name with python version name, e.g. "python3.3-"
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, namePrefix ? python.libPrefix + "-"
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, buildInputs ? []
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# TODO: document
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, distutilsExtraCfg ? ""
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# TODO: say what it does
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, propagatedBuildInputs ? []
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# passed to "python setup.py install"
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, setupPyInstallFlags ? []
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# passed to "python setup.py build"
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, setupPyBuildFlags ? []
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# enable tests by default
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, doCheck ? true
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# List of packages that should be added to the PYTHONPATH
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# environment variable in programs built by this function. Packages
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# in the standard `propagatedBuildInputs' variable are also added.
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# The difference is that `pythonPath' is not propagated to the user
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# environment. This is preferrable for programs because it doesn't
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# pollute the user environment.
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, pythonPath ? []
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, meta ? {}
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, ... } @ attrs:
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# Keep extra attributes from `attrs`, e.g., `patchPhase', etc.
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python.stdenv.mkDerivation (attrs // {
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inherit doCheck;
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name = namePrefix + name;
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buildInputs = [ python wrapPython setuptools (distutils-cfg.override { extraCfg = distutilsExtraCfg; }) ] ++ buildInputs ++ pythonPath;
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propagatedBuildInputs = propagatedBuildInputs ++ [ recursivePthLoader ];
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pythonPath = [ setuptools ] ++ pythonPath;
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configurePhase = attrs.configurePhase or ''
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runHook preConfigure
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# patch python interpreter to write null timestamps when compiling python files
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# with following var we tell python to activate the patch so that python doesn't
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# try to update them when we freeze timestamps in nix store
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export DETERMINISTIC_BUILD=1
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# prepend following line to import setuptools before distutils
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# this way we make sure setuptools monkeypatches distutils commands
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# this way setuptools provides extra helpers such as "python setup.py test"
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sed -i '0,/import distutils/s//import setuptools;import distutils/' setup.py
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sed -i '0,/from distutils/s//import setuptools;from distutils/' setup.py
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runHook postConfigure
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'';
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checkPhase = attrs.checkPhase or ''
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runHook preCheck
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${python}/bin/${python.executable} setup.py test -q
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runHook postCheck
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'';
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buildPhase = attrs.buildPhase or ''
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runHook preBuild
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${python}/bin/${python.executable} setup.py build ${lib.concatStringsSep " " setupPyBuildFlags}
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runHook postBuild
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'';
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installPhase = attrs.installPhase or ''
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runHook preInstall
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mkdir -p "$out/lib/${python.libPrefix}/site-packages"
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export PYTHONPATH="$out/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
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${python}/bin/${python.executable} setup.py install --install-lib=$out/lib/${python.libPrefix}/site-packages \
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--prefix="$out" ${lib.concatStringsSep " " setupPyInstallFlags}
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# A pth file might have been generated to load the package from
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# within its own site-packages, rename this package not to
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# collide with others.
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eapth="$out/lib/${python.libPrefix}"/site-packages/easy-install.pth
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if [ -e "$eapth" ]; then
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# move colliding easy_install.pth to specifically named one
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mv "$eapth" $(dirname "$eapth")/${name}.pth
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fi
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# Remove any site.py files generated by easy_install as these
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# cause collisions. If pth files are to be processed a
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# corresponding site.py needs to be included in the PYTHONPATH.
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rm -f "$out/lib/${python.libPrefix}"/site-packages/site.py*
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runHook postInstall
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'';
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postFixup =
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''
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wrapPythonPrograms
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# If a user installs a Python package, they probably also wants its
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# dependencies in the user environment (since Python modules don't
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# have something like an RPATH, so the only way to find the
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# dependencies is to have them in the PYTHONPATH variable).
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# TODO: better docs
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if test -e $out/nix-support/propagated-build-inputs; then
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ln -s $out/nix-support/propagated-build-inputs $out/nix-support/propagated-user-env-packages
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fi
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createBuildInputsPth build-inputs "$buildInputStrings"
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for inputsfile in propagated-build-inputs propagated-native-build-inputs; do
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if test -e $out/nix-support/$inputsfile; then
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createBuildInputsPth $inputsfile "$(cat $out/nix-support/$inputsfile)"
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fi
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done
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'';
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meta = {
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# default to python's platforms
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platforms = python.meta.platforms;
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} // meta // {
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# add extra maintainer(s) to every package
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maintainers = (meta.maintainers or []) ++ [ lib.maintainers.chaoflow lib.maintainers.iElectric ];
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};
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})
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