Merge pull request #4385 from r-stu31/static_compiler_option_zip_files

Sprockets::StaticCompiler: option ":zip_files"

actionpack/lib/sprockets/static_compiler.rb

@@ -11,6 +11,7 @@ def initialize(env, target, paths, options = {})
       @digest = options.key?(:digest) ? options.delete(:digest) : true
       @manifest = options.key?(:manifest) ? options.delete(:manifest) : true
       @manifest_path = options.delete(:manifest_path) || target
+      @zip_files = options.delete(:zip_files) || /\.(?:css|html|js|svg|txt|xml)$/
     end
 
     def compile
@@ -36,7 +37,7 @@ def write_asset(asset)
         filename = File.join(target, path)
         FileUtils.mkdir_p File.dirname(filename)
         asset.write_to(filename)
-        asset.write_to("#{filename}.gz") if filename.to_s =~ /\.(css|js)$/
+        asset.write_to("#{filename}.gz") if filename.to_s =~ @zip_files
       end
     end