class Sprockets::Utils::Gzip

Returns nothing.

Does not modify the target asset.
the same name plus a `.gz` extension in the same folder as the original.
Compresses the target asset's contents and puts it into a file with

Private: Generates a gzipped file based off of reference asset.

def compress(file, target)
  mtime = Sprockets::PathUtils.stat(target).mtime
  archiver.call(file, source, mtime)
  nil
end