3
0
Fork 0
forked from mirrors/nixpkgs
nixpkgs/pkgs/development/interpreters/python/mk-python-derivation.nix
Frederik Rietdijk 40851a4d26 Python: the pythonModule attribute
Python libraries or modules now have an attribute `pythonModule = interpreter;` to indicate
they provide Python modules for the specified `interpreter`.

The package set provides the following helper functions:

- hasPythonModule: Check whether a derivation provides a Python module.
- requiredPythonModules: Recurse into a list of Python modules, returning all Python modules that are required.
- makePythonPath: Create a PYTHONPATH from a list of Python modules.

Also included in this commit is:
- disabledIf: Helper function for disabling non-buildPythonPackage functions.
2017-11-23 15:11:02 +01:00

99 lines
2.7 KiB
Nix

/* Generic builder for Python packages that come without a setup.py. */
{ lib
, python
, wrapPython
, setuptools
, unzip
, ensureNewerSourcesHook
# Whether the derivation provides a Python module or not.
, pythonModule
, namePrefix
}:
{ name ? "${attrs.pname}-${attrs.version}"
# Dependencies for building the package
, buildInputs ? []
# Dependencies needed for running the checkPhase.
# These are added to buildInputs when doCheck = true.
, checkInputs ? []
# propagate build dependencies so in case we have A -> B -> C,
# C can import package A propagated by B
, propagatedBuildInputs ? []
# DEPRECATED: use propagatedBuildInputs
, pythonPath ? []
# used to disable derivation, useful for specific python versions
, disabled ? false
# Raise an error if two packages are installed with the same name
, catchConflicts ? true
# Additional arguments to pass to the makeWrapper function, which wraps
# generated binaries.
, makeWrapperArgs ? []
# Skip wrapping of python programs altogether
, dontWrapPythonPrograms ? false
, meta ? {}
, passthru ? {}
, doCheck ? false
, ... } @ attrs:
# Keep extra attributes from `attrs`, e.g., `patchPhase', etc.
if disabled
then throw "${name} not supported for interpreter ${python.executable}"
else
python.stdenv.mkDerivation (builtins.removeAttrs attrs ["disabled" "checkInputs" "pythonModule"] // {
name = namePrefix + name;
inherit pythonPath;
buildInputs = [ wrapPython ] ++ buildInputs ++ pythonPath
++ [ (ensureNewerSourcesHook { year = "1980"; }) ]
++ (lib.optional (lib.hasSuffix "zip" attrs.src.name or "") unzip)
++ lib.optionals doCheck checkInputs;
# propagate python/setuptools to active setup-hook in nix-shell
propagatedBuildInputs = propagatedBuildInputs ++ [ python setuptools ];
# Python packages don't have a checkPhase, only an installCheckPhase
doCheck = false;
doInstallCheck = doCheck;
postFixup = lib.optionalString (!dontWrapPythonPrograms) ''
wrapPythonPrograms
'' + lib.optionalString catchConflicts ''
# Check if we have two packages with the same name in the closure and fail.
# If this happens, something went wrong with the dependencies specs.
# Intentionally kept in a subdirectory, see catch_conflicts/README.md.
${python.interpreter} ${./catch_conflicts}/catch_conflicts.py
'' + attrs.postFixup or '''';
passthru = {
inherit python; # The python interpreter
inherit pythonModule;
} // passthru;
meta = with lib.maintainers; {
# default to python's platforms
platforms = python.meta.platforms;
} // meta // {
# add extra maintainer(s) to every package
maintainers = (meta.maintainers or []) ++ [ chaoflow ];
# a marker for release utilities to discover python packages
isBuildPythonPackage = python.meta.platforms;
};
})