当STDOUT字符串匹配运行过程 [英] Run process when string in STDOUT is matched

问题描述

我跑我的博客与杰基尔，我想这会是一个不错的主意，自动打开网站在新的浏览器选项卡时，本地开发服务器完成启动。

I’m running my blog with Jekyll and I thought it’d be a nice idea to automatically open the site in a new browser tab when the local development server finishes starting up.

当您运行杰基尔服务，你有一个像下面的一些输出：

When you run jekyll serve, you have some output like the following:

Configuration file: /Users/jgt/Sites/jezen.github.io/_config.yml
        Source: /Users/jgt/Sites/jezen.github.io
   Destination: dist
  Generating...
                done.
Configuration file: /Users/jgt/Sites/jezen.github.io/_config.yml
    Server address: http://0.0.0.0:4000/
  Server running... press ctrl-c to stop.

我原以为在子shell中运行杰基尔服务并监听其输出。也许我可以在同一时间启动一个并发的无限循环，上面写着一些stdout和运行开http://0.0.0.0:4000 ，然后退出时字符串服务器运行相匹配。我的bash福还不在一个水平，我可以砍的东西在一起。

I had thought of running jekyll serve in a subshell and listening for its output. Maybe I could at the same time fire up a concurrent infinite loop that reads some stdout and runs open http://0.0.0.0:4000 and then exits when the string "Server running" is matched. My bash-fu is not yet at a level where I can hack something together.

我应该如何处理这个？

推荐答案

您可以做在bash是这样的：

You could do something like this in bash:

(jekyll serve) | while read line; do 
    [[ $line =~ "Server running" ]] && open http://0.0.0.0:4000
done

这运行杰基尔服务在子shell和管道标准输出来循环。然后，它使用正则表达式的bash匹配匹配包含服务器运行的字样就行了。

This runs jekyll serve in a subshell and pipes stdout to the loop. It then uses bash regex matching to match the line containing the words "Server running".

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