Cached versions of concatted js/css asset tags have to be written out atomically.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6351 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_view/helpers/asset_tag_helper.rb

@@ -147,9 +147,9 @@ def javascript_include_tag(*sources)
           joined_javascript_path = File.join(JAVASCRIPTS_DIR, joined_javascript_name)
 
           if !File.exists?(joined_javascript_path)
-            File.open(joined_javascript_path, "w+") do |cache|
+            File.atomic_write(joined_javascript_path, File.dirname(joined_javascript_path)) do |cache|
               javascript_paths = expand_javascript_sources(sources).collect do |source|
-                compute_public_path(source, 'javascripts', 'js', false)
+                compute_public_path(source, 'javascripts', 'js')
               end
 
               cache.write(join_asset_file_contents(javascript_paths))
@@ -242,9 +242,9 @@ def stylesheet_link_tag(*sources)
           joined_stylesheet_path = File.join(STYLESHEETS_DIR, joined_stylesheet_name)
 
           if !File.exists?(joined_stylesheet_path)
-            File.open(joined_stylesheet_path, "w+") do |cache|
+            File.atomic_write(joined_stylesheet_path, File.dirname(joined_stylesheet_path)) do |cache|
               stylesheet_paths = expand_stylesheet_sources(sources).collect do |source|
-                compute_public_path(source, 'stylesheets', 'css', false) 
+                compute_public_path(source, 'stylesheets', 'css') 
               end
 
               cache.write(join_asset_file_contents(stylesheet_paths))