module Bundler::Plugin

def list
  installed_plugins = index.installed_plugins
  if installed_plugins.any?
    output = String.new
    installed_plugins.each do |plugin|
      output << "#{plugin}\n"
      output << "-----\n"
      index.plugin_commands(plugin).each do |command|
        output << "  #{command}\n"
      end
      output << "\n"
    end
  else
    output = "No plugins installed"
  end
  Bundler.ui.info output
end