[SOLVED] Find and replace with sed/regex

Issue

I am running this sed command in a bash file:

sed -i -E 's/(={|=")([^}]+)(}"|})/\2/g' "$filename"

But, I'm getting this error: sed: -e expression #1, char 27: Invalid content of \{\}

The regex should match ="{123}" or ={text} (with or without quotes) and replace it with the second capture group (content of {}). I have checked the regex on https://regex101.com/ and it does what I expect. Help, what am I (not) doing wrong? Many thanks!

Solution

sed -E 's/=("?)\{([^}]+)\}\1/\2/g' "$filename"

Here regex to match: =("?)\{([^}]+)\}\1
It uses back-reference \1 to avoid quotes disbalance (like ={qwe}").

Otherwise, it's mostly yours regex.

Demo of usage at regex101

Answered By - markalex

Answer Checked By - Dawn Plyler (WPSolving Volunteer)