f665828fa3
This changeset allows for cross-compilation of Python packages. Packages built with buildPythonPackage are not allowed to refer to the build machine. Executables that have shebangs will refer to the host.
55 lines
1.7 KiB
Nix
55 lines
1.7 KiB
Nix
# This function provides specific bits for building a setuptools-based Python package.
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{ lib
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, python
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}:
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{
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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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, ... } @ 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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in attrs // {
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# we copy nix_run_setup 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 ${setuppy} nix_run_setup
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${python.pythonForBuild.interpreter} nix_run_setup ${lib.optionalString (setupPyBuildFlags != []) ("build_ext " + (lib.concatStringsSep " " setupPyBuildFlags))} bdist_wheel
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runHook postBuild
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'';
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installCheckPhase = attrs.checkPhase or ''
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runHook preCheck
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${python.pythonForBuild.interpreter} nix_run_setup 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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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.pythonForBuild.sitePackages}:$PYTHONPATH"
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mkdir -p $tmp_path/${python.pythonForBuild.sitePackages}
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${python.pythonForBuild.pkgs.bootstrapped-pip}/bin/pip install -e . --prefix $tmp_path >&2
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fi
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${postShellHook}
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'';
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}
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