# File lib/bundler/cli/lock.rb, line 9
    def run
      unless Bundler.default_gemfile
        Bundler.ui.error "Unable to find a Gemfile to lock"
        exit 1
      end

      print = options[:print]
      ui = Bundler.ui
      Bundler.ui = UI::Silent.new if print

      unlock = options[:update]
      definition = Bundler.definition(unlock)
      definition.resolve_remotely! unless options[:local]

      if print
        puts definition.to_lock
      else
        file = options[:lockfile]
        file = file ? File.expand_path(file) : Bundler.default_lockfile
        puts "Writing lockfile to #{file}"
        definition.lock(file)
      end

      Bundler.ui = ui
    end