使用perl脚本命令在多种文本文件中查找和替换特殊字符串

Question

I am using the below single line command for replacing words

perl -i -p -e 's/old/new/g;' *.config

which works fine for normal string. However if i want to replace a string with special characters like below it doesn't work.

perl -i -p -e 's/{{'TEXT' | translate}}/{{'TEXT.T.D' | translate}}/g;' *.config

oldText will be like = {{'TEXT' | translate}} {{'TEXT' | translate}}

New text will be like = {{'TEXT.TD' | translate}} {{'TEXT.TD' | translate}}

Answer 1

The | symbol is a metacharacter in regular expressions (it means "or"). In order to use it to mean itself, you need to escape it with a backslash.

s/{{'TEXT' \| translate}}/{{'TEXT.T.D' | translate}}/g

Another alternative (which will escape all potentially problematic characters in the regex) is to use the \\Q ("quotemeta") escape sequence.

s/\Q{{'TEXT' | translate}}/{{'TEXT.T.D' | translate}}/g