ruby--ruby/lib/rubygems/commands/uninstall_command.rb

require 'rubygems/command'
require 'rubygems/version_option'
require 'rubygems/uninstaller'

module Gem
  module Commands
    class UninstallCommand < Command

      include VersionOption

      def initialize
        super 'uninstall', 'Uninstall gems from the local repository',
              :version => Gem::Requirement.default

        add_option('-a', '--[no-]all',
          'Uninstall all matching versions'
          ) do |value, options|
          options[:all] = value
        end

          add_option('-i', '--[no-]ignore-dependencies',
                     'Ignore dependency requirements while',
                     'uninstalling') do |value, options|
          options[:ignore] = value
        end

          add_option('-x', '--[no-]executables',
                     'Uninstall applicable executables without',
                     'confirmation') do |value, options|
          options[:executables] = value
        end

        add_version_option
        add_platform_option
      end

      def arguments # :nodoc:
        "GEMNAME       name of gem to uninstall"
      end

      def defaults_str # :nodoc:
        "--version '#{Gem::Requirement.default}' --no-force"
      end

      def usage # :nodoc:
        "#{program_name} GEMNAME [GEMNAME ...]"
      end

      def execute
        get_all_gem_names.each do |gem_name|
          Gem::Uninstaller.new(gem_name, options).uninstall
        end
      end
    end
  end
end