Add support for external ocaml deps via opam

Closes Homebrew/homebrew#16280.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

2 files changed, 3 insertions, 1 deletions

diff --git a/Library/Homebrew/dependencies.rb b/Library/Homebrew/dependencies.rb
index 8e6c7afdf..0e4d4be2f 100644
--- a/Library/Homebrew/dependencies.rb
+++ b/Library/Homebrew/dependencies.rb
@@ -16,7 +16,7 @@ require 'build_environment'
 class DependencyCollector
   # Define the languages that we can handle as external dependencies.
   LANGUAGE_MODULES = [
-    :chicken, :jruby, :lua, :node, :perl, :python, :rbx, :ruby
+    :chicken, :jruby, :lua, :node, :ocaml, :perl, :python, :rbx, :ruby
   ].freeze
 
   attr_reader :deps, :requirements
diff --git a/Library/Homebrew/requirements.rb b/Library/Homebrew/requirements.rb
index 9dc8e0660..a7bc9c45d 100644
--- a/Library/Homebrew/requirements.rb
+++ b/Library/Homebrew/requirements.rb
@@ -25,6 +25,7 @@ class LanguageModuleDependency < Requirement
       when :jruby then %W{/usr/bin/env jruby -rubygems -e require\ '#{@import_name}'}
       when :lua then %W{/usr/bin/env luarocks show #{@import_name}}
       when :node then %W{/usr/bin/env node -e require('#{@import_name}');}
+      when :ocaml then %W{/usr/bin/env opam list #{@import_name} | grep #{@import_name}}
       when :perl then %W{/usr/bin/env perl -e use\ #{@import_name}}
       when :python then %W{/usr/bin/env python -c import\ #{@import_name}}
       when :ruby then %W{/usr/bin/env ruby -rubygems -e require\ '#{@import_name}'}
@@ -38,6 +39,7 @@ class LanguageModuleDependency < Requirement
       when :jruby   then "jruby -S gem install"
       when :lua     then "luarocks install"
       when :node    then "npm install"
+      when :ocaml   then "opam install"
       when :perl    then "cpan -i"
       when :python  then "pip install"
       when :rbx     then "rbx gem install"