bash - How to add double quotation marks ("") around pipe-separated fields

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65928100/how-to-add-double-quotation-marks-around-pipe-separated-fields

Answer 1

You can use

sed -E 's/[^|]+/"&"/g' file > newfile

The -E option enables the POSIX ERE syntax and [^|]+ thus matches one or more chars other than |, and "&" replaces each with its copy enclosed with " on both sides.

See the online sed demo:

s='1|2|3|4|
5|6|7|8|
9|10|11|12|'
sed -E 's/[^|]+/"&"/g' <<< "$s"

Output:

"1"|"2"|"3"|"4"|
"5"|"6"|"7"|"8"|
"9"|"10"|"11"|"12"|