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Adding docs for bundlerApp.

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Judson 2017-07-02 17:55:41 -07:00
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2 changed files with 25 additions and 4 deletions
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27
doc/languages-frameworks/ruby.xml
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@ -41,12 +41,34 @@ bundlerEnv rec {
<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
<para>For tools written in Ruby - i.e. where the desire is to install a package and then execute e.g. <command>rake</command> at the command line, there is an alternative builder called <literal>bundlerApp</literal>. Set up the <filename>gemset.nix</filename> the same way, and then, for example:
</para>
<screen>
<![CDATA[{ lib, bundlerApp }:
bundlerApp {
pname = "corundum";
gemdir = ./.;
exes = [ "corundum-skel" ];
meta = with lib; {
description = "Tool and libraries for maintaining Ruby gems.";
homepage = https://github.com/nyarly/corundum;
license = licenses.mit;
maintainers = [ maintainers.nyarly ];
platforms = platforms.unix;
};
}]]>
<para>The chief advantage of <literal>bundlerApp</literal> over <literal>bundlerEnv</literal> is the the executables introduced in the environment are precisely those selected in the <literal>exes</literal> list, as opposed to <literal>bundlerEnv</literal> which adds all the executables made available by gems in the gemset, which can mean e.g. <command>rspec</command> or <command>rake</command> in unpredicable versions available from various packages.
<para>Resulting derivations for both builders 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>
run <command>bundix</command> as specified above and then use <literal>bundlerEnv</literal> like this:</para>
<programlisting>
<![CDATA[let env = bundlerEnv {
@ -74,4 +96,3 @@ in stdenv.mkDerivation {
</programlisting>
</section>

2
pkgs/development/tools/corundum/default.nix
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@ -7,7 +7,7 @@ bundlerApp {
meta = with lib; {
description = "Tool and libraries for maintaining Ruby gems.";
homepage = http://sass-lang.com/;
homepage = https://github.com/nyarly/corundum;
license = licenses.mit;
maintainers = [ maintainers.nyarly ];
platforms = platforms.unix;