ShellScript Utilities Libraries

util.sh

#!/bin/sh

## @PosixCompatible
eecho() { echo "$*" > /dev/stderr; }

## @PosixCompatible
require_commands() {
	(
		missing=0
		for cmd; do
			if ! hash "$cmd" 1>/dev/null 2>&1; then
				missing=1
				eecho "command missing - '$cmd'"
			fi
		done

		if [ "$missing" -gt 0 ]; then
			eecho
			eecho "To run this script, please install above commands."
			return 1
		fi
	) || exit 1
}