forked from mirrors/nixpkgs
3e05cce97c
1. mkDerivation which is used when the source is without setup.py and not a wheel 2. buildPythonPackage which is used as before and calls mkDerivation
127 lines
3.5 KiB
Nix
127 lines
3.5 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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{ lib
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, python
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, mkPythonDerivation
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, bootstrapped-pip
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}:
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{ buildInputs ? []
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# propagate build dependencies so in case we have A -> B -> C,
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# C can import package A propagated by B
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#, propagatedBuildInputs ? []
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# passed to "python setup.py build_ext"
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# https://github.com/pypa/pip/issues/881
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, setupPyBuildFlags ? []
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# Execute before shell hook
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, preShellHook ? ""
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# Execute after shell hook
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, postShellHook ? ""
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# Additional flags to pass to "pip install".
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, installFlags ? []
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, format ? "setup"
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, ... } @ attrs:
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let
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# use setuptools shim (so that setuptools is imported before distutils)
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# pip does the same thing: https://github.com/pypa/pip/pull/3265
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setuppy = ./run_setup.py;
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formatspecific =
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if format == "wheel" then
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{
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unpackPhase = ''
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mkdir dist
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cp $src dist/"''${src#*-}"
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'';
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# Wheels are pre-compiled
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buildPhase = attrs.buildPhase or ":";
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installCheckPhase = attrs.checkPhase or ":";
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# Wheels don't have any checks to run
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doCheck = attrs.doCheck or false;
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}
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else if format == "setup" then
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{
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# we copy nix_run_setup.py over so it's executed relative to the root of the source
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# many project make that assumption
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buildPhase = attrs.buildPhase or ''
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runHook preBuild
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cp ${setuppy} nix_run_setup.py
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${python.interpreter} nix_run_setup.py ${lib.optionalString (setupPyBuildFlags != []) ("build_ext " + (lib.concatStringsSep " " setupPyBuildFlags))} bdist_wheel
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runHook postBuild
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'';
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installCheckPhase = attrs.checkPhase or ''
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runHook preCheck
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${python.interpreter} nix_run_setup.py test
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runHook postCheck
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'';
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# Python packages that are installed with setuptools
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# are typically distributed with tests.
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# With Python it's a common idiom to run the tests
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# after the software has been installed.
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doCheck = attrs.doCheck or true;
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}
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else
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throw "Unsupported format ${format}";
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in mkPythonDerivation ( attrs // {
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# To build and install a wheel we need pip
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buildInputs = buildInputs ++ [ bootstrapped-pip ];
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#inherit propagatedBuildInputs;
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configurePhase = attrs.configurePhase or ''
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runHook preConfigure
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# patch python interpreter to write null timestamps when compiling python files
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# this way python doesn't try to update them when we freeze timestamps in nix store
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export DETERMINISTIC_BUILD=1
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runHook postConfigure
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'';
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installPhase = attrs.installPhase or ''
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runHook preInstall
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mkdir -p "$out/${python.sitePackages}"
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export PYTHONPATH="$out/${python.sitePackages}:$PYTHONPATH"
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pushd dist
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${bootstrapped-pip}/bin/pip install *.whl --no-index --prefix=$out --no-cache ${toString installFlags}
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popd
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runHook postInstall
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'';
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shellHook = attrs.shellHook or ''
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${preShellHook}
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if test -e setup.py; then
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tmp_path=$(mktemp -d)
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export PATH="$tmp_path/bin:$PATH"
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export PYTHONPATH="$tmp_path/${python.sitePackages}:$PYTHONPATH"
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mkdir -p $tmp_path/${python.sitePackages}
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${bootstrapped-pip}/bin/pip install -e . --prefix $tmp_path
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fi
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${postShellHook}
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'';
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} // formatspecific)
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