How to make bash command echo lines green

Question

I have a bash script with command echo turned on (set -x). I want the echo lines to be printed in green text, but the output of the actual commands to be in whatever the default color is. I can use $PS4 to get the green, but I don't see a way to turn it of after each echo, so the result is that all output becomes green.

Answer 1

Try this:

#!/bin/bash
exec 3<> >(sed -e "s/.*/\o033[0;32m&\o033[0m/")
BASH_XTRACEFD=3
set -x
...

(requires bash 4.1, I believe; use awk or perl or bash builtins instead of sed if you prefer)