sed多行替换 [英] sed multiline replace

问题描述

这是我的示例文本文件:

this is my sample text file :

asdas
//<<<TAG
this should be removed
//TAG>>>
this should be there
//<<<TAG
T
>
asd
asd
//TAG>>>

我希望将o/p设置为:

for which i want o/p as :

asdas

this should be there

基本上，我试图在"//<< >>"之间找到行(也包括这些行)并将其删除.

Basically i m trying to find lines between "//<<>>" (including these lines too) and delete them.

我尝试使用sed

sed -n '1h; 1！H; $ {; g; s///<<<<> TAG >>>//g; p;}' < test.txt

sed -n '1h;1!H;${;g;s///<<]*TAG>>>//g;p;}' < test.txt

但是有些原因并没有产生正确的输出.包含>"符号的第二个标签在正则表达式中失败.不知道我要去哪里错了吗?

But some how it did not produced correct output. The second tag which contained ">" symbol failed in regex. Not sure where i m going wrong?

任何想法怎么做?

推荐答案

如果您要删除文字文本为'TAG'的行，请尝试:

If you are trying to delete lines with the literal text 'TAG', try:

sed '/\/\/<<<TAG/,/\/\/TAG>>>/d'

在您的评论中，TAG可能不是文字的，在这种情况下:

From your comments, it appears that TAG may not be literal, in which case:

sed '/^\/\/<</,/^\/\/.*>>/d'

这可以通过使用其他定界符来简化:

This can be simplified by using a different delimiter:

sed '@^//<<<@,@^//.*>>>@d'

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