forked from mirrors/nixpkgs
117 lines
3.5 KiB
Nix
117 lines
3.5 KiB
Nix
# Generic builder.
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{ lib
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, config
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, python
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, wrapPython
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, setuptools
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, unzip
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, ensureNewerSourcesForZipFilesHook
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# Whether the derivation provides a Python module or not.
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, toPythonModule
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, namePrefix
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, writeScript
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, update-python-libraries
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}:
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{ name ? "${attrs.pname}-${attrs.version}"
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# Build-time dependencies for the package
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, nativeBuildInputs ? []
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# Run-time dependencies for the package
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, buildInputs ? []
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# Dependencies needed for running the checkPhase.
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# These are added to buildInputs when doCheck = true.
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, checkInputs ? []
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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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# DEPRECATED: use propagatedBuildInputs
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, pythonPath ? []
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# used to disable derivation, useful for specific python versions
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, disabled ? false
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# Raise an error if two packages are installed with the same name
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, catchConflicts ? true
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# Additional arguments to pass to the makeWrapper function, which wraps
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# generated binaries.
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, makeWrapperArgs ? []
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# Skip wrapping of python programs altogether
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, dontWrapPythonPrograms ? false
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# Remove bytecode from bin folder.
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# When a Python script has the extension `.py`, bytecode is generated
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# Typically, executables in bin have no extension, so no bytecode is generated.
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# However, some packages do provide executables with extensions, and thus bytecode is generated.
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, removeBinBytecode ? true
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, meta ? {}
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, passthru ? {}
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, doCheck ? config.doCheckByDefault or false
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, ... } @ attrs:
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# Keep extra attributes from `attrs`, e.g., `patchPhase', etc.
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if disabled
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then throw "${name} not supported for interpreter ${python.executable}"
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else
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let self = toPythonModule (python.stdenv.mkDerivation (builtins.removeAttrs attrs [
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"disabled" "checkInputs" "doCheck" "doInstallCheck" "dontWrapPythonPrograms" "catchConflicts"
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] // {
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name = namePrefix + name;
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nativeBuildInputs = [ ensureNewerSourcesForZipFilesHook ]
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++ nativeBuildInputs;
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buildInputs = [ wrapPython ]
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++ lib.optional (lib.hasSuffix "zip" (attrs.src.name or "")) unzip
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++ lib.optional catchConflicts setuptools # If we no longer propagate setuptools
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++ buildInputs
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++ pythonPath;
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# Propagate python and setuptools. We should stop propagating setuptools.
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propagatedBuildInputs = propagatedBuildInputs ++ [ python setuptools ];
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# Python packages don't have a checkPhase, only an installCheckPhase
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doCheck = false;
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doInstallCheck = doCheck;
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installCheckInputs = checkInputs;
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postFixup = lib.optionalString (!dontWrapPythonPrograms) ''
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wrapPythonPrograms
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'' + lib.optionalString removeBinBytecode ''
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if [ -d "$out/bin" ]; then
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rm -rf "$out/bin/__pycache__" # Python 3
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find "$out/bin" -type f -name "*.pyc" -delete # Python 2
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fi
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'' + lib.optionalString catchConflicts ''
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# Check if we have two packages with the same name in the closure and fail.
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# If this happens, something went wrong with the dependencies specs.
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# Intentionally kept in a subdirectory, see catch_conflicts/README.md.
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${python.interpreter} ${./catch_conflicts}/catch_conflicts.py
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'' + attrs.postFixup or '''';
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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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isBuildPythonPackage = python.meta.platforms;
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} // meta;
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}));
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passthru.updateScript = let
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filename = builtins.head (lib.splitString ":" self.meta.position);
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in attrs.passthru.updateScript or [ update-python-libraries filename ];
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in lib.extendDerivation true passthru self
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