Bash. How to get multiline text between tags
awk, linux, regex, sed, shell
Solution
Never use range expressions as they make tirivial tasks slightly briefer but then need a complete rewrite to avoid duplicate conditions when things get even slightly more interesting, as in your case. Always use a flag instead:
$ awk 'f{ if (/TAG2/){printf "%s", buf; f=0; buf=""} else buf = buf $0 ORS}; /TAG1/{f=1}' file
some right text
Problem
I'm trying to get text in my file between two tags. But if script finds opening tag and do not finds closing tag then it prints file from opening tag to the file's end. For example text is: ``` aaa TAG1 some right text TAG2 some text2 TAG1 some text3 some text4 ``` and script like this: ``` awk "/TAG1/,/TAG2/" ``` or ``` sed -n "/TAG1/,/TAG2/p" ``` than output will be: ``` some right text some text3 some text4 ``` but I need this: ``` some right text ```