使用％x捕获命令行错误 [英] Catching command-line errors using %x

问题描述

每当您想在命令行上执行某些操作时，您可以使用以下语法：

 ％x运行）
  

但是，我想捕获错误或至少获取响应，正确。我尝试设置：

  result =％x（命令运行）
  pre> 
 
 
并使用try-catch 
  begin 
％x（命令运行）
 rescue 
无效
 end 
  
无效。 
解决方案
因此，这不能直接回答你的问题t捕获命令的输出）。但是，您可以只检查退出代码（ $？），而不是尝试 begin  /  rescue  ）：
 ％x（命令运行）
除非$？ == 0 
ack！error occurred
 end 
  
 编辑：刚刚记住这个新项目。我认为它完全符合您的需要：
 
 
 
  https：/ /github.com/envato/safe_shell  
 
Whenever you want to execute something on the command line, you can use the following syntax:
%x(command to run)
However, I want to catch an error or at least get the response so I can parse it correctly. I tried setting:
result = %x(command to run)
and using a try-catch
begin
  %x(command to run)
rescue
  "didn't work"
end
to no avail. How can I capture the results instead of having them printed out?
解决方案
So this doesn't directly answer your question (won't capture the command's output).  But instead of trying begin/rescue, you can just check the exit code ($?) of the command:
%x(command to run)
unless $? == 0
   "ack! error occurred"
end
Edit: Just remembered this new project.  I think it does exactly what you want:

https://github.com/envato/safe_shell

                        
这篇关于使用％x捕获命令行错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！