How to add single quote after specific word using sed? - bash

Question

I am trying to write a script to add a single quote after a "GOOD" word .
For example, I have file1 :
//WER GOOD=ONE
//WER1 GOOD=TWO2
//PR1 GOOD=THR45
...
Desired change is to add single quotes :
//WER GOOD='ONE'
//WER1 GOOD='TWO2'
//PR1 GOOD='THR45'
...
This is the script which I am trying to run:
#!/bin/bash
for item in `grep "GOOD" file1 | cut -f2 -d '='`
do
sed -i 's/$item/`\$item/`\/g' file1
done
Thank you for the help in advance !

Answer 1

Could you please try following.
sed "s/\(.*=\)\(.*\)/\1'\2'/" Input_file
OR as per OP's comment to remove empty line use:
sed "s/\(.*=\)\(.*\)/\1'\2'/;/^$/d" Input_file
Explanation: following is only for explanation purposes.
sed " ##Starting sed command from here.
s/ ##Using s to start substitution process from here.
\(.*=\)\(.*\) ##Using sed buffer capability to store matched regex into memory, saving everything till = in 1st buffer and rest of line in 2nd memory buffer.
/\1'\2' ##Now substituting 1st and 2nd memory buffers with \1'\2' as per OP need adding single quotes before = here.
/" Input_file ##Closing block for substitution, mentioning Input_file name here.
Please use -i option in above code in case you want to save output into Input_file itself.
2nd solution with awk:
awk 'match($0,/=.*/){$0=substr($0,1,RSTART) "\047" substr($0,RSTART+1,RLENGTH) "\047"} 1' Input_file
Explanation: Adding explanation for above code.
awk '
match($0,/=.*/){ ##Using match function to mmatch everything from = to till end of line.
$0=substr($0,1,RSTART) "\047" substr($0,RSTART+1,RLENGTH) "\047" ##Creating value of $0 with sub-strings till value of RSTART and adding ' then sub-strings till end of line adding ' then as per OP need.
} ##Where RSTART and RLENGTH are variables which will be SET once a TRUE matched regex is found.
1 ##1 will print edited/non-edited line.
' Input_file ##Mentioning Input_file name here.
3rd solution: In case you have only 2 fields in your Input_file then try more simpler in awk:
awk 'BEGIN{FS=OFS="="} {$2="\047" $2 "\047"} 1' Input_file
Explanation of 3rd code: Use only for explanation purposes, for running please use above code itself.
awk ' ##Starting awk program here.
BEGIN{FS=OFS="="} ##Setting FS and OFS values as = for all line for Input_file here.
{$2="\047" $2 "\047"} ##Setting $2 value with adding a ' $2 and then ' as per OP need.
1 ##Mentioning 1 will print edited/non-edited lines here.
' Input_file ##Mentioning Input_file name here.