nixpkgs/pkgs/development/interpreters/ruby/gem.nix
Yury G. Kudryashov 08a1b61716 Make it possible to override system ruby gems
svn path=/nixpkgs/trunk/; revision=25658
2011-01-21 08:25:11 +00:00

53 lines
1.5 KiB
Nix

{stdenv, fetchurl, ruby, rubygems, makeWrapper, patches, overrides}:
let
gemDefaults = { name, basename, requiredGems, sha256, meta }:
{
buildInputs = [rubygems ruby makeWrapper];
unpackPhase = ":";
configurePhase=":";
bulidPhase=":";
src = fetchurl {
url = "http://rubygems.org/downloads/${name}.gem";
inherit sha256;
};
name = "ruby-${name}";
propagatedBuildInputs = requiredGems;
inherit meta;
installPhase = ''
export HOME=$TMP/home; mkdir -pv "$HOME"
gem install -V --ignore-dependencies \
-i "$out/${ruby.gemPath}" -n "$out/bin" "$src" $gemFlags -- $buildFlags
rm -frv $out/${ruby.gemPath}/cache # don't keep the .gem file here
addToSearchPath GEM_PATH $out/${ruby.gemPath}
for prog in $out/bin/*; do
wrapProgram "$prog" \
--prefix GEM_PATH : "$GEM_PATH" \
--prefix RUBYLIB : "${rubygems}/lib" \
--set RUBYOPT 'rubygems'
done
for prog in $out/gems/*/bin/*; do
[[ -e "$out/bin/$(basename $prog)" ]]
done
runHook postInstall
'';
};
mb = stdenv.lib.maybeAttr;
patchedGem = a: stdenv.mkDerivation (removeAttrs (stdenv.lib.mergeAttrsByFuncDefaults
([ (gemDefaults a) ]
++ (stdenv.lib.concatMap (p: [(mb a.basename {} p) (mb a.name {} p)] )
patches)))
[ "mergeAttrBy" ]);
in
aName: a@{ name, basename, requiredGems, sha256, meta }:
stdenv.lib.foldl (d: o: mb name (mb basename d o) o) (patchedGem a) overrides