# File lib/commands/plugin/repositories.rb, line 86
  def save
    mkdir_p(File.dirname(@cache_file)) unless File.exist?(File.dirname(@cache_file))
    File.open(@cache_file, 'w') do |f|
      @source_cache['repositories'] = @repositories.map {|r| r.uri }.uniq
      f.write(@source_cache.to_yaml)
      f.write("\n")
    end
  end