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https://github.com/NixOS/nixpkgs.git
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93b18ceb30
The generic 'buildPythonPackage' function used to use the build/install command "easy_install" unconditionally. That didn't work for python-numpy, for instance, because the package wants "setup.py" run with additional parameters to determine the fortran compiler of choice. The newly introduced function argument 'installCommand' allows to implement this. By passing that parameter, the default build command can be overridden. svn path=/nixpkgs/trunk/; revision=22786
101 lines
3.3 KiB
Nix
101 lines
3.3 KiB
Nix
/* This function provides a generic Python package builder. It is
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intended to work with packages that use `setuptools'
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(http://pypi.python.org/pypi/setuptools/), which represents a large
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number of Python packages nowadays. */
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{ python, setuptools, makeWrapper, lib }:
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{ name, namePrefix ? "python-", src, meta, patches ? []
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, installCommand ? ""
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, doCheck ? true, checkPhase ? "python setup.py test"
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, postInstall ? ""
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, ... } @ attrs:
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let
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defaultInstallCommand = ''easy_install --prefix="$out" .'';
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# Return the list of recursively propagated build inputs of PKG.
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recursiveBuildInputs =
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pkg:
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[ pkg ] ++
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(if pkg ? propagatedBuildNativeInputs
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then lib.concatLists (map recursiveBuildInputs
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pkg.propagatedBuildNativeInputs)
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else []);
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in
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python.stdenv.mkDerivation (
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# Keep extra attributes from ATTR, e.g., `patchPhase', etc.
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attrs
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//
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(rec {
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inherit src meta patches doCheck checkPhase;
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name = namePrefix + attrs.name;
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buildInputs = [ python setuptools makeWrapper ] ++
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(if attrs ? buildInputs then attrs.buildInputs else []);
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propagatedBuildInputs = [ setuptools ] ++
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(if attrs ? propagatedBuildInputs
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then attrs.propagatedBuildInputs
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else []);
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buildPhase = "true";
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# XXX: Should we run `easy_install --always-unzip'? It doesn't seem
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# to have a noticeable impact on small scripts.
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installPhase = ''
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ensureDir "$out/lib/${python.libPrefix}/site-packages"
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echo "installing \`${name}' with \`easy_install'..."
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export PYTHONPATH="$out/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
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${if installCommand == "" then defaultInstallCommand else installCommand}
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${postInstall}
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'';
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postFixup = ''
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# Wrap scripts that are under `{s,}bin/' so that they get the right
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# $PYTHONPATH.
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for i in "$out/bin/"* "$out/sbin/"*
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do
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if head -n1 "$i" | grep -q "${python}"
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then
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echo "wrapping \`$i'..."
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# Compute a $PATH prefix for the program.
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program_PATH=""
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${lib.concatStrings
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(map (path:
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''if [ -d "${path}/bin" ]
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then
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program_PATH="${path}/bin'' + "\$" + ''{program_PATH:+:}$program_PATH"
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fi
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'')
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(lib.concatMap recursiveBuildInputs propagatedBuildInputs))}
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wrapProgram "$i" \
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--prefix PYTHONPATH ":" \
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${lib.concatStringsSep ":"
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([ "$out/lib/${python.libPrefix}/site-packages" ] ++
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(map (path: path + "/lib/${python.libPrefix}/site-packages")
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(lib.concatMap recursiveBuildInputs
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propagatedBuildInputs)))} \
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--prefix PATH ":" "$program_PATH"
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fi
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done
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# If a user installs a Python package, she probably also wants its
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# dependencies in the user environment (since Python modules don't
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# have something like an RPATH, so the only way to find the
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# dependencies is to have them in the PYTHONPATH variable).
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if test -e $out/nix-support/propagated-build-inputs; then
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ln -s $out/nix-support/propagated-build-inputs $out/nix-support/propagated-user-env-packages
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fi
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'';
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}))
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