CODEWITHSUNDEEP
shellsed
rock_buddy
rock_buddy

Reputation: 263

Shell Script for commenting a line

I want to comment a line where ever this condition comes

if(a & b)? c:d;

so i have seen one script,but its not working.

for f in var.c; do
  cat $f | sed 's@if(a & b)\(.*\)$@/*\1 */@' > converted-files/$f
done

Can any one tell me the better script than this which will work for my circumstance.

Upvotes: 0

Views: 80

Answers (2)

Jonathan Leffler
Jonathan Leffler

Reputation: 753525

You really shouldn't be using cat. Your code fragment is not valid C, either, but that may be a good reason for commenting it out.

for f in var.c
do
    sed 's@if(a & b).*$@/*&*/@' $f > converted-files/$f
done

You can add spaces around the comment markers if you prefer, but symmetry suggests either 0 or 2 spaces in total, not just 1 as in your script.

Upvotes: 0

devnull
devnull

Reputation: 123458

Your sed expression is written to include only the part after the ternary operator. Try:

sed 's@if(a & b).*$@/* & */@'

That said, I'm not sure if you really want to use regex to comment out code.

Upvotes: 1

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