How to print awk's results with different colors for different fields?

Question

This file has 3 fields. I wanted e.g. the first 2 fields in green, and the third in white (NB : black background), so I tried :

awk \'{print \"\\033[0;32m\"$         


        

Answer 1

To get color output from awk, you can use this approach.

function red(s) {
    printf "\033[1;31m" s "\033[0m "
}

function green(s) {
    printf "\033[1;32m" s "\033[0m "
}

function blue(s) {
    printf "\033[1;34m" s "\033[0m "
}

{
    print red($1), green($2), blue($3)
}

Answer 2

An alternative to using awk functions is passing the colors in shell variables. E.g.

RED='\033[01;31m'
GREEN='\033[01;32m'
YELLOW='\033[01;33m'
BLUE='\033[01;34m'
NONE='\033[0m'

echo "Col1 Col2 Col3 Col4" | \
awk -v r=$RED -v y=$YELLOW -v g=$GREEN -v b=$BLUE -v n=$NONE \
 '{printf r$1n y$2n g$3n b$4n "\n"}'