catdir

catdir.zsh

#!/usr/bin/zsh
set -e

function print_usage() {
	echo 'Usage: catdir DIR...'
}

function catdir() {
	local d="${1:-.}"
	for f in $(find "$d" -type f); do
		echo -e "\033[0;36m$f\033[0m:"
		cat "$f"
		echo
	done
}

while getopts ":h" opt; do
	case ${opt} in
		h)
			print_usage
			exit 0
			;;
		\?)
			echo "Unknown argument: -$OPTARG" >2
			exit 1
			;;
		:)
			printf "Invalid argument: -%s requires an argument\n" "$OPTARG" >&2
			exit 1
			;;
	esac
done
shift $((OPTIND -1))

if [ $# -lt 1 ]; then
	catdir
else
	while [ $# -gt 0 ]; do
		catdir "$1"
		shift
	done
fi