def plugins
      raise NeedsReinstall, output if needs_reinstall?
      plugin_lines.map {|l| parse_line l.match(PARSE_PLUGIN) }.to_set
    end
def plugins
      raise NeedsReinstall, output if needs_reinstall?
      plugin_lines.map {|l| parse_line l.match(PARSE_PLUGIN) }.to_set
    end
Retrieves a Set containing all the plugins from the output