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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
pre [-c COLOR] PREFIX
pre -h
EOF
}
help() {
cat <<-'EOF'
Options:
-c COLOR ANSI color to be used on the prefix text
-h, --help show this message
EOF
}
for flag in "$@"; do
case "$flag" in
--)
break
;;
--help)
usage
help
exit
;;
*)
;;
esac
done
COLOR=''
while getopts 'c:h' flag; do
case "$flag" in
c)
COLOR="$OPTARG"
;;
h)
usage
help
exit
;;
*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
assert_arg() {
if [ -z "$1" ]; then
printf 'Missing %s\n\n' "$2" >&2
usage >&2
exit 2
fi
}
PREFIX="${1:-}"
assert_arg "$PREFIX" 'PREFIX'
while read -r line; do
if [ -z "$COLOR" ]; then
printf '%s: %s\n' "$PREFIX" "$line"
else
printf '%s: %s\n' "$(color -c "$COLOR" "$PREFIX")" "$line"
fi
done
|
