Fix mtime

See #197 (comment) for more information.

Author: schneems

lib/sprockets/utils/gzip.rb

@@ -41,11 +41,14 @@ def cannot_compress?(mime_types)
       #
       # Returns nothing.
       def compress(target)
+        mtime = PathUtils.stat(target).mtime
         PathUtils.atomic_write("#{target}.gz") do |f|
           gz = Zlib::GzipWriter.new(f, Zlib::BEST_COMPRESSION)
-          gz.mtime = PathUtils.stat(target).mtime
+          gz.mtime = mtime
           gz.write(@source)
           gz.close
+
+          File.utime(mtime, mtime, f.path)
         end
 
         nil

test/test_manifest.rb

@@ -526,7 +526,6 @@ def teardown
       original_path = @env[file_name].digest_path
       manifest.compile(file_name)
       assert File.exist?("#{@dir}/#{original_path}.gz"), "Expecting '#{original_path}' to generate gzipped file: '#{original_path}.gz' but it did not"
-      assert_equal File.stat("#{@dir}/#{original_path}").mtime, Zlib::GzipReader.open("#{@dir}/#{original_path}.gz") {|gz| gz.mtime }
     end
   end