Rails – list gems at runtime

Here’s a quick little debug feature that’s handy when you need to do a quick verification of the gems at runtime. Especially handy if you have limited access to production.

Helper method using bundler to display the list gems

_list_gems.html.haml:

bundler_helper.rb:

The code is specific to my application but you can get the point. I have the helper method called inside a div on a page only an admin user can see. Alternatively, you could output the list to a log based on a config flag or execute from a rake file.

Any thoughts? Questions? Issues? Please leave a comment.