# This function provides specific bits for building a setuptools-based Python package. { lib , python }: { # passed to "python setup.py build_ext" # https://github.com/pypa/pip/issues/881 # Rename to `buildOptions` because it is not setuptools specific? setupPyBuildFlags ? [] # Execute before shell hook , preShellHook ? "" # Execute after shell hook , postShellHook ? "" , ... } @ attrs: let options = lib.concatMapStringsSep " " (option: "--global-option ${option}") setupPyBuildFlags; in attrs // { buildPhase = attrs.buildPhase or '' runHook preBuild mkdir -p dist echo "Creating a wheel..." ${python.pythonForBuild.interpreter} -m pip wheel --no-index --no-deps --no-clean --no-build-isolation --wheel-dir dist ${options} . echo "Finished creating a wheel..." runHook postBuild ''; installCheckPhase = '' runHook preCheck echo "No checkPhase defined. Either provide a checkPhase or disable tests in case tests are not available."; exit 1 runHook postCheck ''; # With Python it's a common idiom to run the tests # after the software has been installed. doCheck = attrs.doCheck or true; shellHook = attrs.shellHook or '' ${preShellHook} # Long-term setup.py should be dropped. if [ -e pyproject.toml ]; then tmp_path=$(mktemp -d) export PATH="$tmp_path/bin:$PATH" export PYTHONPATH="$tmp_path/${python.pythonForBuild.sitePackages}:$PYTHONPATH" mkdir -p $tmp_path/${python.pythonForBuild.sitePackages} ${python.pythonForBuild.pkgs.bootstrapped-pip}/bin/pip install -e . --prefix $tmp_path >&2 fi ${postShellHook} ''; }