From dd8bfcb49f10922173e2f3d3171e8a8e5ba54be9 Mon Sep 17 00:00:00 2001
From: Daniel Bovensiepen <daniel@bovensiepen.net>
Date: Fri, 3 May 2013 14:06:16 +0800
Subject: Implement GemList which can identify GEM duplicates

---
 tasks/mruby_build_gem.rake | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'tasks')

diff --git a/tasks/mruby_build_gem.rake b/tasks/mruby_build_gem.rake
index 83c46de24..b40522331 100644
--- a/tasks/mruby_build_gem.rake
+++ b/tasks/mruby_build_gem.rake
@@ -1,4 +1,20 @@
 module MRuby
+  class GemList < Array
+    def <<(gem)
+      fail ArgumentError.new("Don't find directory for this GEM") unless gem.respond_to? :dir
+      unless include?(gem)
+        super(gem)
+      else
+        # GEM was already added to this list
+      end
+    end
+
+    # we assume that a gem with the same directory is equal
+    def include?(gem)
+      detect {|g| g.dir == gem.dir }
+    end
+  end
+
   module LoadGems
     def gembox(gemboxfile)
       gembox = File.expand_path("#{gemboxfile}.gembox", "#{MRUBY_ROOT}/mrbgems")
-- 
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