How to uninstall all gems installed using `bundle install`

Question

How can I remove all the gems installed using bundle install in a particular RoR project. I don\'t want to uninstall gems that are used by other projects.

Answer 1

Found solution for uninstalling all gems except of default:

Crete delete_gems.rb with

#!/usr/bin/env ruby
# Remove all gems EXCEPT defaults :)

`gem list -d`.split(/\n\n^(?=\w)/).each do |data|
  match = data.match(/(?([^\s]+)) \((?.*)\)/)
  name = match[:name]
  versions = match[:versions].split(', ')

  if match = data.match(/^.*\(([\d\.]*),? ?default\): .*$/)
    next if match[1].empty? # it's the only version if this match is empty
    versions.delete(match[1] || versions[0])
  end

  versions.each { |v| system "gem uninstall -Ix #{name} -v #{v}" }
end

Run this script:

sudo chmod 1777 delete_gems.rb
./delete_gems.rb

All gems will be removed except of default. Here link on original solution http://zanshin.net/2013/06/10/how-to-delete-all-ruby-gems/