Add `fileDelimeter` option?

[rwjblue]

While doing build work, I often open up dist/assets/vendor.js or dist/assets/vendor.css to inspect the contents (to confirm I didn't make any mistakes etc). It would be very convenient if we added delimiters surrounding each file that we concat.

Concretely, I am proposing:

• Add support for a fileDelimeters option. A few special values could be used for substitution (e.g. {{FILE_PATH}} would be the path of the file being added).
  • Possible usage example: fileDelimeters: ['\n/* BEGIN {{FILE_PATH}} */', '\n/* END {{FILE_PATH}} */']
• Default to "do nothing" (which means the built asset would be identical)
• Update ember-cli to specify the fileDelimeters option in non-production builds.

Thoughts?

[stefanpenner]

👍