From a9064dce15ff6872611457b9c3fdc0104167895b Mon Sep 17 00:00:00 2001
From: Yuichiro MASUI <masui@masuidrive.jp>
Date: Mon, 21 Jan 2013 23:52:39 +0900
Subject: Added "Unknown toolchain/gem" error message

---
 tasks/mruby_build_gem.rake | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'tasks/mruby_build_gem.rake')

diff --git a/tasks/mruby_build_gem.rake b/tasks/mruby_build_gem.rake
index ae0a79447..80990773d 100644
--- a/tasks/mruby_build_gem.rake
+++ b/tasks/mruby_build_gem.rake
@@ -2,7 +2,11 @@ module MRuby
   module LoadGems
     def gem(gemdir, &block)
       gemdir = load_external_gem(gemdir) if gemdir.is_a?(Hash)
-      load File.join(gemdir, "mrbgem.rake")
+      gemrake = File.join(gemdir, "mrbgem.rake")
+
+      fail "Can't find #{gemrake}" unless File.exists?(gemrake)
+      load gemrake
+
       Gem.current.dir = gemdir
       Gem.current.build = MRuby::Build.current
       Gem.current.build_config_initializer = block
-- 
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