nixpkgs/pkgs/development/interpreters/python/mk-python-derivation.nix
Robert Scott 45ac7700fa mkPythonDerivation: obey a dontWrapPythonPrograms attribute
This should allow a python derivation to disable possibly overzealous
python program wrapping without having to override the whole fixupPhase
2017-05-27 14:25:08 +02:00

98 lines
2.7 KiB
Nix

/* Generic builder for Python packages that come without a setup.py. */
{ lib
, python
, wrapPython
, setuptools
, unzip
, ensureNewerSourcesHook
}:
{ name
# by default prefix `name` e.g. "python3.3-${name}"
, namePrefix ? python.libPrefix + "-"
# Dependencies for building the package
, buildInputs ? []
# Dependencies needed for running the checkPhase.
# These are added to buildInputs when doCheck = true.
, checkInputs ? []
# propagate build dependencies so in case we have A -> B -> C,
# C can import package A propagated by B
, propagatedBuildInputs ? []
# DEPRECATED: use propagatedBuildInputs
, pythonPath ? []
# used to disable derivation, useful for specific python versions
, disabled ? false
# Raise an error if two packages are installed with the same name
, catchConflicts ? true
# Additional arguments to pass to the makeWrapper function, which wraps
# generated binaries.
, makeWrapperArgs ? []
# Skip wrapping of python programs altogether
, dontWrapPythonPrograms ? false
, meta ? {}
, passthru ? {}
, doCheck ? false
, ... } @ attrs:
# Keep extra attributes from `attrs`, e.g., `patchPhase', etc.
if disabled
then throw "${name} not supported for interpreter ${python.executable}"
else
python.stdenv.mkDerivation (builtins.removeAttrs attrs ["disabled" "checkInputs"] // {
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
} // 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;
};
})