258 lines
8.7 KiB
Nix
258 lines
8.7 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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, 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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, update-python-libraries
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, setuptools
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, flitBuildHook
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, pipBuildHook
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, pipInstallHook
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, pythonCatchConflictsHook
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, pythonImportsCheckHook
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, pythonNamespacesHook
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, pythonOutputDistHook
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, pythonRemoveBinBytecodeHook
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, pythonRemoveTestsDirHook
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, setuptoolsBuildHook
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, setuptoolsCheckHook
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, wheelUnpackHook
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, eggUnpackHook
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, eggBuildHook
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, eggInstallHook
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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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, nativeCheckInputs ? []
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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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# Enabled to detect some (native)BuildInputs mistakes
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, strictDeps ? true
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, outputs ? [ "out" ]
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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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# TODO: For cross we probably need a different PYTHONPATH, or not
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# add the runtime deps until after buildPhase.
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, catchConflicts ? (python.stdenv.hostPlatform == python.stdenv.buildPlatform)
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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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# Don't use Pip to install a wheel
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# Note this is actually a variable for the pipInstallPhase in pip's setupHook.
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# It's included here to prevent an infinite recursion.
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, dontUsePipInstall ? false
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# Skip setting the PYTHONNOUSERSITE environment variable in wrapped programs
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, permitUserSite ? 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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# Several package formats are supported.
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# "setuptools" : Install a common setuptools/distutils based package. This builds a wheel.
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# "wheel" : Install from a pre-compiled wheel.
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# "flit" : Install a flit package. This builds a wheel.
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# "pyproject": Install a package using a ``pyproject.toml`` file (PEP517). This builds a wheel.
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# "egg": Install a package from an egg.
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# "other" : Provide your own buildPhase and installPhase.
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, format ? "setuptools"
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, meta ? {}
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, passthru ? {}
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, doCheck ? config.doCheckByDefault or false
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, disabledTestPaths ? []
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, ... } @ attrs:
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let
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inherit (python) stdenv;
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withDistOutput = lib.elem format ["pyproject" "setuptools" "flit" "wheel"];
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name_ = name;
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validatePythonMatches = attrName: let
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isPythonModule = drv:
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# all pythonModules have the pythonModule attribute
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(drv ? "pythonModule")
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# Some pythonModules are turned in to a pythonApplication by setting the field to false
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&& (!builtins.isBool drv.pythonModule);
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isMismatchedPython = drv: drv.pythonModule != python;
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optionalLocation = let
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pos = builtins.unsafeGetAttrPos (if attrs ? "pname" then "pname" else "name") attrs;
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in lib.optionalString (pos != null) " at ${pos.file}:${toString pos.line}:${toString pos.column}";
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leftPadName = name: against: let
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len = lib.max (lib.stringLength name) (lib.stringLength against);
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in lib.strings.fixedWidthString len " " name;
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throwMismatch = drv: let
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myName = "'${namePrefix}${name}'";
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theirName = "'${drv.name}'";
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in throw ''
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Python version mismatch in ${myName}:
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The Python derivation ${myName} depends on a Python derivation
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named ${theirName}, but the two derivations use different versions
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of Python:
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${leftPadName myName theirName} uses ${python}
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${leftPadName theirName myName} uses ${toString drv.pythonModule}
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Possible solutions:
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* If ${theirName} is a Python library, change the reference to ${theirName}
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in the ${attrName} of ${myName} to use a ${theirName} built from the same
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version of Python
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* If ${theirName} is used as a tool during the build, move the reference to
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${theirName} in ${myName} from ${attrName} to nativeBuildInputs
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* If ${theirName} provides executables that are called at run time, pass its
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bin path to makeWrapperArgs:
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makeWrapperArgs = [ "--prefix PATH : ''${lib.makeBinPath [ ${lib.getName drv } ] }" ];
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${optionalLocation}
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'';
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checkDrv = drv:
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if (isPythonModule drv) && (isMismatchedPython drv)
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then throwMismatch drv
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else drv;
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in inputs: builtins.map (checkDrv) inputs;
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# Keep extra attributes from `attrs`, e.g., `patchPhase', etc.
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self = toPythonModule (stdenv.mkDerivation ((builtins.removeAttrs attrs [
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"disabled" "checkPhase" "checkInputs" "nativeCheckInputs" "doCheck" "doInstallCheck" "dontWrapPythonPrograms" "catchConflicts" "format"
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"disabledTestPaths" "outputs"
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]) // {
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name = namePrefix + name_;
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nativeBuildInputs = [
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python
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wrapPython
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ensureNewerSourcesForZipFilesHook # move to wheel installer (pip) or builder (setuptools, flit, ...)?
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pythonRemoveTestsDirHook
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] ++ lib.optionals catchConflicts [
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pythonCatchConflictsHook
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] ++ lib.optionals removeBinBytecode [
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pythonRemoveBinBytecodeHook
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] ++ lib.optionals (lib.hasSuffix "zip" (attrs.src.name or "")) [
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unzip
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] ++ lib.optionals (format == "setuptools") [
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setuptoolsBuildHook
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] ++ lib.optionals (format == "flit") [
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flitBuildHook
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] ++ lib.optionals (format == "pyproject") [
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pipBuildHook
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] ++ lib.optionals (format == "wheel") [
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wheelUnpackHook
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] ++ lib.optionals (format == "egg") [
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eggUnpackHook eggBuildHook eggInstallHook
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] ++ lib.optionals (!(format == "other") || dontUsePipInstall) [
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pipInstallHook
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] ++ lib.optionals (stdenv.buildPlatform == stdenv.hostPlatform) [
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# This is a test, however, it should be ran independent of the checkPhase and checkInputs
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pythonImportsCheckHook
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] ++ lib.optionals (python.pythonAtLeast "3.3") [
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# Optionally enforce PEP420 for python3
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pythonNamespacesHook
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] ++ lib.optionals withDistOutput [
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pythonOutputDistHook
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] ++ nativeBuildInputs;
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buildInputs = validatePythonMatches "buildInputs" (buildInputs ++ pythonPath);
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propagatedBuildInputs = validatePythonMatches "propagatedBuildInputs" (propagatedBuildInputs ++ [
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# we propagate python even for packages transformed with 'toPythonApplication'
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# this pollutes the PATH but avoids rebuilds
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# see https://github.com/NixOS/nixpkgs/issues/170887 for more context
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python
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]);
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inherit strictDeps;
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LANG = "${if python.stdenv.isDarwin then "en_US" else "C"}.UTF-8";
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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 = attrs.doCheck or true;
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nativeInstallCheckInputs = [
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] ++ lib.optionals (format == "setuptools") [
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# Longer-term we should get rid of this and require
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# users of this function to set the `installCheckPhase` or
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# pass in a hook that sets it.
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setuptoolsCheckHook
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] ++ nativeCheckInputs;
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installCheckInputs = checkInputs;
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postFixup = lib.optionalString (!dontWrapPythonPrograms) ''
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wrapPythonPrograms
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'' + attrs.postFixup or "";
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# Python packages built through cross-compilation are always for the host platform.
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disallowedReferences = lib.optionals (python.stdenv.hostPlatform != python.stdenv.buildPlatform) [ python.pythonForBuild ];
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outputs = outputs ++ lib.optional withDistOutput "dist";
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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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} // lib.optionalAttrs (attrs?checkPhase) {
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# If given use the specified checkPhase, otherwise use the setup hook.
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# Longer-term we should get rid of `checkPhase` and use `installCheckPhase`.
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installCheckPhase = attrs.checkPhase;
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} // lib.optionalAttrs (disabledTestPaths != []) {
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disabledTestPaths = lib.escapeShellArgs disabledTestPaths;
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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
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(disabled -> throw "${name} not supported for interpreter ${python.executable}")
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passthru
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self
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