class Gem::Commands::SourcesCommand

def initialize
  require "fileutils"
  super "sources",
        "Manage the sources and cache file RubyGems uses to search for gems"
  add_option "-a", "--add SOURCE_URI", "Add source" do |value, options|
    options[:add] = value
  end
  add_option "-l", "--list", "List sources" do |value, options|
    options[:list] = value
  end
  add_option "-r", "--remove SOURCE_URI", "Remove source" do |value, options|
    options[:remove] = value
  end
  add_option "-c", "--clear-all",
             "Remove all sources (clear the cache)" do |value, options|
    options[:clear_all] = value
  end
  add_option "-u", "--update", "Update source cache" do |value, options|
    options[:update] = value
  end
  add_option "-f", "--[no-]force", "Do not show any confirmation prompts and behave as if 'yes' was always answered" do |value, options|
    options[:force] = value
  end
  add_proxy_option
end