Question

In rails, I would like to find an incremental number that increases or at least changes with everyone deployment or git commit/push.

I need this for cache busting the CDN.

config.action_controller.asset_path = proc { |asset_path|
  "/rel-#{RELEASE_NUMBER}#{asset_path}"
}

Any suggestions? Thanks

Answer 1

Something like?

def release_sha
  @release_sha ||= `git log -1 --pretty=format:%h 2>/dev/null`
end

You could do one better with this approach and get the SHA for different folders/files.

def release_sha(path=nil)
  @release_sha ||= {}
  @release_sha[path] ||= `git log -1 --pretty=format:%h #{path} 2>/dev/null`
end

Then call it like release_sha('/public/images') for the latest SHA for that folder.