Improved gem cleanup: ignores Rails, tries to avoid user interaction.

gem_improved_cleanup.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'rubygems/user_interaction'
require 'rubygems/uninstaller'

# New RubyGems?
#specs = Gem::Specification.find_all_by_name do |s|
#  s.name != "rails"
#end

dep = Gem::Dependency.new //, Gem::Requirement.default
specs = Gem.source_index.search dep
candidates = specs.inject(Hash.new([])) {|acc, elm|
  acc[elm.name] += [elm]; acc
}.delete_if {|k,v| v.count == 1 or k == "rails"}

deplist = Gem::DependencyList.from_source_index Gem.source_index

keys = candidates.keys.sort

keys.each do |k|
  v = candidates[k]
  sorted = v.sort_by {|s| s.version}
  last = sorted.pop

  ok = sorted.select {|s| deplist.ok_to_remove?(s.full_name)}

  puts "Found: #{k}; latest: #{last.version}; #{sorted.count} other version(s). #{ok.count} OK to remove."

  ok.each do |s|
    puts "Attempting uninstall of #{s.full_name}"
    opts = {
      :executables => false,
      :version => "= #{s.version}",
    }
    uninstaller = Gem::Uninstaller.new s.name, opts
    uninstaller.uninstall
  end
end