#!/bin/sh
set -eu

usage() {
	cat <<-'EOF'
		record-my-screen [FILE]
		record-my-screen -h
	EOF
}

help() {
	cat <<-'EOF'


		Options:
		  -h, --help    show this message

		  FILE          the name of the output file (default: out.webm)


		Do a screen capture.  Exit with "q".


		Examples:

		  Just run it:

		    $ record-my-screen
	EOF
}


for flag in "$@"; do
	case "$flag" in
		(--)
			break
			;;
		(--help)
			usage
			help
			exit
			;;
		(*)
			;;
	esac
done

while getopts 'h' flag; do
	case "$flag" in
		(h)
			usage
			help
			exit
			;;
		(*)
			usage >&2
			exit 2
			;;
	esac
done
shift $((OPTIND - 1))

FILE="${1:-out.webm}"


RESOLUTION="$(xrandr -q --current | awk '/[*]/ && $0=$1')"

ffmpeg \
	-f pulse         \
	-i default       \
	-f x11grab       \
	-s "$RESOLUTION" \
	-i "$DISPLAY"    \
	"$FILE"