awk - 在多行匹配后追加文本行并在第一个多行匹配处停止

Question

我需要一个 sed 或 awk 命令，而不是脚本:

1) 在文件中依次匹配 2 个字符串:

 # This configuration option has an automatic default value.
 # filter = [ "a|.*/|" ]

这是必需的，因为任何单个字符串都可以在文件中多次出现。 但是两个这样的连续字符串非常独特地匹配它们。

2) 在匹配的字符串之后插入/append 此文本行:

filter = ["a|sd.*|", "a|drbd.*|", "r|.*|"]

3) 在第一次匹配后停止处理并追加

因此，文本文件如下所示:

     ...

     # filter = [ "a|^/dev/hda8$|", "r|.*/|" ]
     #
     # This configuration option has an automatic default value.
     # filter = [ "a|.*/|" ]

     # Configuration option devices/global_filter.
     # Limit the block devices that are used by LVM system components.
     # Because devices/filter may be overridden from the command line, it is
     # not suitable for system-wide device filtering, e.g. udev and lvmetad.
     # Use global_filter to hide devices from these LVM system components.
     # The syntax is the same as devices/filter. Devices rejected by
     # global_filter are not opened by LVM.
     # This configuration option has an automatic default value.
     # global_filter = [ "a|.*/|" ]

     # Configuration option devices/types.
     # List of additional acceptable block device types.
     # These are of device type names from /proc/devices, followed by the

     ...

我需要这样的输出:

     ...

     # filter = [ "a|^/dev/hda8$|", "r|.*/|" ]
     #
     # This configuration option has an automatic default value.
     # filter = [ "a|.*/|" ]

     filter = ["a|sd.*|", "a|drbd.*|", "r|.*|"]

     # Configuration option devices/global_filter.
     # Limit the block devices that are used by LVM system components.
     # Because devices/filter may be overridden from the command line, it is
     # not suitable for system-wide device filtering, e.g. udev and lvmetad.
     # Use global_filter to hide devices from these LVM system components.
     # The syntax is the same as devices/filter. Devices rejected by
     # global_filter are not opened by LVM.
     # This configuration option has an automatic default value.
     # global_filter = [ "a|.*/|" ]

     # Configuration option devices/types.
     # List of additional acceptable block device types.
     # These are of device type names from /proc/devices, followed by the

     ...

在 stackoverflow 上找到的多行 sed 示例中没有一个对我有用。

我尝试了本主题中的 F. Hauri 示例:Append a string after a multiple line match in bash

 sed -e $'/^admin:/,/^$/{/users:/a\    NewUser\n}'

在匹配唯一单词时它工作正常，但在匹配连续文本行时不起作用，如下所示:

 # This configuration option has an automatic default value.
 # filter = [ "a|.*/|" ]

并且在 sed 表达式中添加 '0, 以在第一个匹配时停止在这种情况下不起作用。

更新了描述以更好地描述目标。

Answer 1

    awk '
    /^\s+\# This configuration option has an automatic default value\./{
      found=1
    }
    found && !flag && /\s+\# filter = \[ \"a\|\.\*\/\|\" \]/{
      flag=1
      $0=$0 ORS ORS "        filter = [\"a|sd.*|\", \"a|drbd.*|\", \"r|.*|\"]"
    }
    1
    '  test.conf > test.tmp && cp test.conf test.conf.bak && mv -f test.tmp test.conf