dead_gems

DeadGems

lists your app's unused gems

Installation

Add this line to your application's Gemfile:

gem 'dead_gems'

And then execute:

$ bundle

Or install it yourself as:

$ gem install dead_gems

Usage

DeadGems::find is the main entry point. It takes the path to your project's root (which should contain your Gemfile) and a shell command to use in that project that should touch as much of your code as possible.

NOTE This will take a long time as it uses TracePoint to check the source location of every method call to see if the code being leveraged is in a gem directory.

# First make sure to backup any changes you have (e.g. commit them to git, stash them, etc)
$ irb
$ irb(main)> require 'dead_gems'
$ irb(main)> DeadGems.find('~/my_slow_project', 'bundle exec rake test')

# You can also specify the path to your test helper if you are using RSpec or something
$ irb(main)> DeadGems.find('~/my_slow_project', 'bundle exec rake test', test_helper: 'spec/spec_helper.rb')

This will run my project's tests and output all of the gems that aren't used in my tests.

Contributing

1. Fork it ( https://github.com/jbodah/dead_gems/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request