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Merge pull request #12284 from abbradar/bundlerenv-wrapper

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bundlerEnv: add wrapper
This commit is contained in:
Nikolay Amiantov 2016-01-23 12:02:09 +03:00
commit dc162f648c
2 changed files with 50 additions and 6 deletions
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32
doc/languages-frameworks/ruby.xml
View File

@ -42,5 +42,37 @@ and scalable.";
<para>Please check in the <filename>Gemfile</filename>, <filename>Gemfile.lock</filename> and the <filename>gemset.nix</filename> so future updates can be run easily.
</para>
<para>Resulting derivations also have two helpful items, <literal>env</literal> and <literal>wrapper</literal>. The first one allows one to quickly drop into
<command>nix-shell</command> with the specified environment present. E.g. <command>nix-shell -A sensu.env</command> would give you an environment with Ruby preset
so it has all the libraries necessary for <literal>sensu</literal> in its paths. The second one can be used to make derivations from custom Ruby scripts which have
<filename>Gemfile</filename>s with their dependencies specified. It is a derivation with <command>ruby</command> wrapped so it can find all the needed dependencies.
For example, to make a derivation <literal>my-script</literal> for a <filename>my-script.rb</filename> (which should be placed in <filename>bin</filename>) you should
run <command>bundix</command> as specified above and then use <literal>bundlerEnv</literal> lile this:</para>
<programlisting>
<![CDATA[let env = bundlerEnv {
name = "my-script-env";
inherit ruby;
gemfile = ./Gemfile;
lockfile = ./Gemfile.lock;
gemset = ./gemset.nix;
};
in stdenv.mkDerivation {
name = "my-script";
buildInputs = [ env.wrapper ];
script = ./my-script.rb;
buildCommand = ''
mkdir -p $out/bin
install -D -m755 $script $out/bin/my-script
patchShebangs $out/bin/my-script
'';
}]]>
</programlisting>
</section>

24
pkgs/development/interpreters/ruby/bundler-env/default.nix
View File

@ -65,8 +65,24 @@ let
"${bundler}/${ruby.gemPath}" \
${shellEscape (toString envPaths)}
'' + lib.optionalString (postBuild != null) postBuild;
passthru = {
passthru = rec {
inherit ruby bundler meta gems;
wrapper = stdenv.mkDerivation {
name = "wrapper-${name}";
nativeBuildInputs = [ makeWrapper ];
buildCommand = ''
mkdir -p $out/bin
for i in ${ruby}/bin/*; do
makeWrapper "$i" $out/bin/$(basename "$i") \
--set BUNDLE_GEMFILE ${confFiles}/Gemfile \
--set BUNDLE_PATH ${bundlerEnv}/${ruby.gemPath} \
--set GEM_HOME ${bundlerEnv}/${ruby.gemPath} \
--set GEM_PATH ${bundlerEnv}/${ruby.gemPath}
done
'';
};
env = let
irbrc = builtins.toFile "irbrc" ''
if !(ENV["OLD_IRBRC"].nil? || ENV["OLD_IRBRC"].empty?)
@ -77,12 +93,8 @@ let
'';
in stdenv.mkDerivation {
name = "interactive-${name}-environment";
nativeBuildInputs = [ ruby bundlerEnv ];
nativeBuildInputs = [ wrapper bundlerEnv ];
shellHook = ''
export BUNDLE_GEMFILE=${confFiles}/Gemfile
export BUNDLE_PATH=${bundlerEnv}/${ruby.gemPath}
export GEM_HOME=${bundlerEnv}/${ruby.gemPath}
export GEM_PATH=${bundlerEnv}/${ruby.gemPath}
export OLD_IRBRC="$IRBRC"
export IRBRC=${irbrc}
'';