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edward/unused_gems.rb

Created February 22, 2014 13:26
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Lists unloaded gems
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unused_gems.rb
require "bundler"
bundled_gems = Bundler.load.specs.sort_by { |s| s.name }.map { |s| s.name }
# Which gem paths are in the Gemfile.lock that are missing from the loaded files?
# gem_paths - loaded files = unused gems
loaded_gems = $LOADED_FEATURES.map {|lf| lf[/gems\/2.1.0\/gems\/(?<gem>\S*?)-\d.+\//, "gem"] }.compact.uniq
unused_gems = bundled_gems - loaded_gems
puts unused_gems
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