Using awk to color the output in bash - awk

Question

I have two files.
First one is csv while other one is plain text file.
I want to print all the lines of file2 which contains column 1 of first file with font color column2 and background color column3.
for example:
f1 contains
Basic Engineering,BLACK,WHITE
Science,RED,BLUE
f2 contains with field width of 20 each:
foo abc Science AA
bar cde Basic Engineering AP
baz efgh Science AB
expected output:
foo abc Science AA (Red font, Blue background)
bar cde Basic Engineering AP (Black font, White background)
baz efgh Science AB (Red font, Blue background)
I have already defined color in a seperate file defineColors.sh as:
BLACK_FONT=`tput setaf 0`
RED_FONT=`tput setaf 1`
WHITE_BACKGROUND=`tput setab 7`
BLUE_BACKGROUND=`tput setab 4`
RESET_ALL=`tput sgr0`
My try :
awk -F, '{sed "/$1/p" f2 | sed -e 's/^\(.*\)$/'"$2_FONT"''"$3_BACKGROUND"'\1/' }' f1

Answer 1

$ cat tst.awk
BEGIN {
split("BLACK RED GREEN YELLOW BLUE MAGENTA CYAN WHITE",tputColors)
for (i in tputColors) {
colorName = tputColors[i]
colorNr = i-1
cmd = "tput setaf " colorNr
fgEscSeq[colorName] = ( (cmd | getline escSeq) > 0 ? escSeq : "<" colorName ">" )
close(cmd)
cmd = "tput setab " colorNr
bgEscSeq[colorName] = ( (cmd | getline escSeq) > 0 ? escSeq : "<" colorName ">" )
close(cmd)
}
cmd = "tput sgr0"
colorOff = ( (cmd | getline escSeq) > 0 ? escSeq : "<sgr0>" )
close(cmd)
FS = ","
}
NR == FNR {
key = $1
fgColor[key] = fgEscSeq[$2]
bgColor[key] = bgEscSeq[$3]
next
}
{
# change this to substr($0,41,20) for your real 20-char fields data
key = substr($0,15,20)
gsub(/^[[:space:]]+|[[:space:]]+$/,"",key)
print bgColor[key] fgColor[key] $0 colorOff
}
Using the pipe to cat -v so you can see color code escape sequences are being output:
$ awk -f tst.awk f1 f2 | cat -v
^[[44m^[[31mfoo abc Science AA^[(B^[[m
^[[47m^[[30mbar cde Basic Engineering AP^[(B^[[m
^[[44m^[[31mbaz efgh Science AB^[(B^[[m
I see you updated your question to say I have already defined color in a seperate file defineColors.sh as: and showed a shell script - just don't use that, it's not needed.