Change compressor API so that plugins can register default compressors for...

Change compressor API so that plugins can register default compressors for their stylesheet or JS engines and still allow the user to turn off compression

actionpack/lib/sprockets/railtie.rb

@@ -28,7 +28,8 @@ def self.using_scss?
 
     # We need to configure this after initialization to ensure we collect
     # paths from all engines. This hook is invoked exactly before routes
-    # are compiled.
+    # are compiled, and so that other Railties have an opportunity to
+    # register compressors.
     config.after_initialize do |app|
       assets = app.config.assets
       next unless assets.enabled
@@ -61,8 +62,8 @@ def asset_environment(app)
       env.static_root = File.join(app.root.join("public"), assets.prefix)
       env.paths.concat assets.paths
       env.logger = Rails.logger
-      env.js_compressor = expand_js_compressor(assets.js_compressor)
-      env.css_compressor = expand_css_compressor(assets.css_compressor)
+      env.js_compressor = expand_js_compressor(assets.js_compressor) if app.assets.compress
+      env.css_compressor = expand_css_compressor(assets.css_compressor) if app.assets.compress
       env
     end
 

railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt

@@ -21,4 +21,7 @@
 
   # Only use best-standards-support built into browsers
   config.action_dispatch.best_standards_support = :builtin
+
+  # Do not compress assets
+  config.assets.compress = false
 end

railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt

@@ -11,9 +11,11 @@
   # Disable Rails's static asset server (Apache or nginx will already do this)
   config.serve_static_assets = false
 
-  # Compress both stylesheets and JavaScripts
+  # Compress JavaScripts and CSS
+  config.assets.compress = true
+
+  # Specify the default JavaScript compressor
   config.assets.js_compressor  = :uglifier
-  config.assets.css_compressor = :scss
 
   # Specifies the header that your server uses for sending files
   # (comment out if your front-end server doesn't support this)