I want to create a function for colored output (just to learn bash a little better)
Here is what works
ESC_SEQ="\x1b["
# foreground red
FG_RED="${ESC_SEQ}31;"
# background yellow
BG_YELLOW="43;"
# style bold
FS_BOLD="1m"
# echo
echo -e "${FG_RED}${BG_YELLOW}${FS_BOLD}Hello World!"
No i try to build the function
function ext_echo()
{
// lets say $1 is RED, $2 is YELLOW, $3 is BOLD
// so is need something like ...
echo -e "${FG_$1}${BG_$2}${FS_$3}Hello World!"
}
The following script should be a good enough starting point:
#!/bin/bash
ext_echo()
{
declare -A colors
colors=(
[red]="<red>"
[blue]="<blue>"
)
for c in "$@"; do
echo ${colors[$c]}
done
}
ext_echo red blue
output
<red>
<blue>
export ESC_SEQ="\e["
export YELLOW="43m"
function format_text()
{
BG="$ESC_SEQ$1"
echo -e "${BG}Hello World!"
}
format_text $YELLOW
I don't know how and if it's possible without temporary variable. All examples I found use tmp variable to achieve it.
\e[43m not 43; misc.flogisoft.com/bash/tip_colors_and_formatting#background1