在多行匹配后追加文本行并在第一个多行匹配时停止

Question

我需要一个 sed 或 awk 命令，而不是脚本，即：

1) 按顺序匹配文件中的 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出现多次。但是其中两个这样的顺序字符串非常独特，可以匹配它们。

2) inserts/appends 在匹配的字符串后此文本行：

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

     ...

None 在 Whosebug 上找到的多行 sed 示例的示例对我有用。

我尝试了这个主题中的 F.Hauri 示例：

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

它在匹配独特的单词时工作正常，但不适用于像这样匹配连续的文本行：

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

并且在 sed 表达式中添加 '0 以在第一次匹配时停止在这种情况下不起作用。

更新说明以更好地描述目标。

Answer 1

    awk '
    /^\s+\# This configuration option has an automatic default value\./{
      found=1
    }
    found && !flag && /\s+\# filter = \[ \"a\|\.\*\/\|\" \]/{
      flag=1
      [=10=]=[=10=] 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

在多行匹配后追加文本行并在第一个多行匹配时停止

Append text line after multiline match and stop on first multiline match

awk

sed

append

multiline