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/* This function provides a generic Python package builder. It is
intended to work with packages that use `setuptools'
(http://pypi.python.org/pypi/setuptools/), which represents a large
number of Python packages nowadays. */
{ python, setuptools, wrapPython, lib }:
{ name, namePrefix ? "python-"
, buildInputs ? []
, # List of packages that should be added to the PYTHONPATH
# environment variable in programs built by this function. Packages
# in the standard `propagatedBuildInputs' variable are also added.
# The difference is that `pythonPath' is not propagated to the user
# environment. This is preferrable for programs because it doesn't
# pollute the user environment.
pythonPath ? []
, installCommand ?
''
easy_install --prefix="$out" .
''
, buildPhase ? "true"
, doCheck ? true
, checkPhase ?
''
runHook preCheck
python setup.py test
runHook postCheck
''
, postInstall ? ""
, ... } @ attrs:
# Keep extra attributes from ATTR, e.g., `patchPhase', etc.
python.stdenv.mkDerivation (attrs // {
inherit doCheck buildPhase checkPhase;
name = namePrefix + name;
buildInputs = [ python wrapPython setuptools ] ++ buildInputs ++ pythonPath;
pythonPath = [ setuptools] ++ pythonPath;
# XXX: Should we run `easy_install --always-unzip'? It doesn't seem
# to have a noticeable impact on small scripts.
installPhase = ''
mkdir -p "$out/lib/${python.libPrefix}/site-packages"
echo "installing \`${name}' with \`easy_install'..."
export PYTHONPATH="$out/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
${installCommand}
${postInstall}
'';
postFixup =
''
wrapPythonPrograms
# If a user installs a Python package, she probably also wants its
# dependencies in the user environment (since Python modules don't
# have something like an RPATH, so the only way to find the
# dependencies is to have them in the PYTHONPATH variable).
if test -e $out/nix-support/propagated-build-inputs; then
ln -s $out/nix-support/propagated-build-inputs $out/nix-support/propagated-user-env-packages
fi
'';
})
|