如何从YML在shell脚本中移除子块？ [英] How to remove a child block from YML in shell script?

问题描述

我想比较两个阳明文件和删除基于使用shell脚本一定的条件块。我使用这个阳明解析器， https：//开头gist.github.com/pkuczynski/8665367 为阳明的文件进行比较。但我真的很strugglig很多关于从中除去块。例如，

I'm trying to compare two yml files and removing a block based on some conditions using shell script. I'm using this YML parser, https://gist.github.com/pkuczynski/8665367 for the comparison of yml files. But I'm really strugglig a lot for removing the block from them. For example,

tool:
  image: tool.xxx.com/platform/app:dev
  log_driver: syslog
  restart: always
  ports:
    - "54325:80"
    - "543325:80"
  volume:
    - "a:b"

tool1:
  image: tool1.xxx.com/platform/app:dev
  log_driver: syslog
  restart: always
  ports:
    - "54325:80"
    - "543325:80"
  volume:
    - "a:b"

如何删除端口下阻止工具键，这将使得输出类似，

How to remove ports block under tool and which will make output similar to,

tool:
  image: tool.xxx.com/platform/app:dev
  log_driver: syslog
  restart: always
  volume:
    - "a:b"

tool1:
  image: tool1.xxx.com/platform/app:dev
  log_driver: syslog
  restart: always
  ports:
    - "54325:80"
    - "543325:80"
  volume:
    - "a:b"

我试着用AWK和SED几岁，但我不知道到底，因为它包含涉及多行一些复杂的情况。

I tried somethings using awk and sed, but I don't know exactly as it contains some complex condition involving multiple lines.

任何帮助或建议将是很大的帮助和很多AP preciated。

Any help or suggestion on this would be greatly helpful and much appreciated.

推荐答案

您可以使用此awk命令：

You can use this awk command:

awk '$1 == "tool:"{t=1}
   t==1 && $1 == "ports:"{t++; next}
   t==2 && /:[[:blank:]]*$/{t=0}
   t != 2' file.yml

说明：

• 设置 T = 1 当我们遇到工具：作为第一列


• 当 T == 1 ，使 T = 2 当我们遇到第1列端口：


• 重置为 T = 0 在 T == 2 ，我们得到了与结束的行：

！
• 打印时每 T = 2 （意味着我们不在行工具 - ＆GT;端口：部分）

• Set t=1 when we encounter tool: as first column
• When t==1, make t=2 when we encounter 1st column in ports:
• Reset to t=0 when t==2 and we get a line that ends with :
• print each line when t != 2 (means we are not in tool: -> ports: section)

输出：

tool:
  image: tool.xxx.com/platform/app:dev
  log_driver: syslog
  restart: always
  volume:
    - "a:b"

tool1:
  image: tool1.xxx.com/platform/app:dev
  log_driver: syslog
  restart: always
  ports:
    - "54325:80"
    - "543325:80"
  volume:
    - "a:b"

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