Merge pull request #144 from matthewd/ignore_missing_dependencies

Ignore missing dependencies, instead of failing

Author: rafaelfranca

lib/sprockets/rails/helper.rb

@@ -173,6 +173,7 @@ def stylesheet_link_tag(*sources)
         def check_dependencies!(dep)
           depend_on(dep)
           depend_on_asset(dep)
+        rescue Sprockets::FileNotFound
         end
 
         # Raise errors when source does not exist or is not in the precompiled list

test/fixtures/error/missing.css.erb

@@ -0,0 +1 @@
+p { background: url(<%= image_path "does_not_exist.png" %>); }

test/test_helper.rb

@@ -450,8 +450,11 @@ def test_asset_digest
 class AutomaticDependenciesFromHelpersTest < HelperTest
 
   def test_dependency_added
-    @view.asset_path("url.css")
-
     assert_equal ["logo.png", "url.css.erb"], @assets['url.css'].send(:dependency_paths).map {|d| File.basename(d.pathname) }.sort
   end
+
+  def test_ignores_missing_dependencies
+    assert_equal ["missing.css.erb"], @assets['error/missing.css'].send(:dependency_paths).map {|d| File.basename(d.pathname) }.sort
+  end
+
 end