Ruby-MCollective：如何将命令的输出转换成Ruby变量（或对象）

我希望有人能在这方面帮助我，我正在写一个ruby脚本，我有一个问题。首先是大局：

当我从cli运行命令时：

$ mco rpc puppet last_run_summary 

我得到这个输出：

epuppet01.example.com                          
       Changed Resources: 0
   Config Retrieval Time: 1.21247005462646
          Config Version: 1377176819
        Failed Resources: 1
                Last Run: 1377241107
   Out of Sync Resources: 1
          Since Last Run: 195
                 Summary: {"events"=>{"total"=>1, "success"=>0, "failure"=>1},
                           "resources"=>
                            {"scheduled"=>0,
                             "total"=>8,
                             "skipped"=>7,
                             "out_of_sync"=>1,
                             "failed"=>1,
                             "changed"=>0,
                             "failed_to_restart"=>0,
                             "restarted"=>0},
                           "changes"=>{"total"=>0},
                           "version"=>{"config"=>1377176819, "puppet"=>"3.1.1"},
                           "time"=>
                            {"config_retrieval"=>1.21247005462646,
                             "total"=>1.85353105462646,
                             "last_run"=>1377241107,
                             "package"=>0.641061}}
         Total Resources: 8
              Total Time: 1.85353105462646
       Type Distribution: {"Package"=>1}

我想要的是将该命令的输出重定向/获取到某个变量/对象中。具体来说，我想从摘要中获取“失败的资源”部分或“失败的”值

有什么想法吗？a怎么能这么做

到目前为止，代码如下所示：

def runSingle
  cmd = []
  cmd.push(which("mco", ["/usr/bin", "/opt/puppet/bin"]))
  shell_command(cmd + ["rpc", "puppet", " last_run_summary", "-I"] + shell_escaped_nodes)
 end

---

谢谢

您可以这样更改代码：

def runSingle
  cmd = []
  cmd.push(which("mco", ["/usr/bin", "/opt/puppet/bin"]))
  cmd_output = shell_command(cmd + ["rpc", "puppet", " last_run_summary", "-I"] + shell_escaped_nodes)
  result = cmd_failure_stats(cmd_output)
  # you'll get 'result' as Ruby hash, like:
  # {
  #   :failed_resources => "1",
  #   :summary_failed => "1"
  # }
  # from which you can access desired values as:
  # result[:failed_resources] #=> "1"
end

def cmd_failure_stats(raw_string)
  return_result = {}
  raw_string.lines.map do |line|
    return_result[:failed_resources] = line[/Failed Resources.*([\d]+)/, 1] if line[/(Failed Resources.*[\d]+)/, 1]
    return_result[:summary_failed] = line[/failed\".*=>([\d]+)/, 1] if line[/failed\".*=>([\d]+)/, 1] }
  end
  return_result
end