#!/bin/sh

usage () {
	cat <<EOF>&2
Usage: ${0##*/} [OPTIONS]

This script will enable all HDMI videos, passing xrandr OPTIONS to each one of
them.

To do this automatically when the cable is plugged, add the following
udev rule (Linux only):

  $ cat /etc/udev/rules.d/hdmi.rules
  SUBSYSTEM=="drm", ACTION=="change", RUN+="/bin/sh $0"
EOF
}

XRANDR_OPTIONS="$@"
[ -z "$XRANDR_OPTIONS" ] && XRANDR_OPTIONS="--auto --noprimary"

XRANDR_BUF=$(xrandr)
PRIMARY=$(echo "$XRANDR_BUF" | awk '$1 !~ "HDMI" && $2 == "connected" {print $1; exit}')
HDMI_OUTPUTS=$(echo "$XRANDR_BUF" | awk '$1 ~ "HDMI" && $2 == "connected" {printf $1 " "}')
set -- $HDMI_OUTPUTS

if [ $# -eq 0 ]; then
	echo xrandr --output $PRIMARY --auto --primary
	xrandr --output $PRIMARY --auto --primary
else
	for i; do
		echo xrandr --output $i $XRANDR_OPTIONS
		xrandr --output $i $XRANDR_OPTIONS
	done
	echo
	echo "## Run this to turn off primary screen:"
	echo "# xrandr --output $PRIMARY --off"
fi