Would have removed .. in heroku deploy log

Question

a few days ago I started to see

 Would have removed best_in_place (2.0.2)
 Would have removed thor (0.16.0)

in my heroku deploy output.

Answer 1

After some research, it appears this isn't a bug, but a feature!

as you can see here https://github.com/carlhuda/bundler/pull/2237

a dry_run flag has been implmented to act as if gems would have been removed and instead of removing them it just prints that

the actual code is here

 if Bundler.settings[:dry_run]
          Bundler.ui.info "Would have removed #{output}"
        else
          Bundler.ui.info "Removing #{output}"
          FileUtils.rm_rf(gem_dir)
        end

as you can see, if dry_run it prints thats. else it removes the gem

so as this is a feature and not a bug, it is not going to be fixed any time soon. This leaves a question for heroku (which I am waiting for a reply) as to why they are using dry_run..

Note for those that aren't aware - This bloats slug size