fphilipe/premailer-rails — pull request #71 by zsalzbank (2013-05-28 20:59:36+00:00)
Title: handle file not being in digest for asset pipeline

The AssetPipelineLoader would use Kernel.open to try and retreive an
absolute path on the server (i.e. '/stylesheets/email.css'). This patch
makes request_and_unzip return nil when the file cannot be found so that
the FileSystemLoader is used as a last resort.