#!/bin/sh

trap 'rm -fr $TMPFIFODIR' EXIT
TMPFIFODIR=$(mktemp -d)
mkfifo $TMPFIFODIR/campipe

SGDEVS=

rm -fr %%LINUXBASE%%/etc/makemkv/devices
rm -fr %%LINUXBASE%%/etc/makemkv/drivers

camcontrol devlist | grep -E '[(,]cd[0-9]+[,)]' > $TMPFIFODIR/campipe &
while read line
do
	SCBUS=`echo $line | grep -Eo 'scbus[0-9]+' | sed -e 's:scbus::'`
	TARGET=`echo $line | grep -Eo 'target [0-9]+' | sed -e 's:target ::'`
	LUN=`echo $line | grep -Eo 'lun [0-9]+' | sed -e 's:lun ::'`
	SGDEV=`echo $line | grep -Eo '(.*)' | grep -Eo 'sg[0-9]+'`
	if [ -n "$SCBUS" -a -n "$TARGET" -a -n "$LUN" ]; then
		if [ -z "$SGDEV" ]; then
			cat <<EOF
Optical drive without 'sg' device found! Make sure your kernel supports
sg devices. To build a kernel with sg devices, you must add the following
to your kernel configuration:

device		sg

Refer to
<https://docs.freebsd.org/en/books/handbook/kernelconfig/#kernelconfig-building>
for building a custom kernel.

When finished, re-run this script (update-makemkv-drives).
EOF
			exit 1
		fi
		SGDEVS="$SGDEVS /dev/$SGDEV"
		LOC=$SCBUS:0:$TARGET:$LUN
		mkdir -p %%LINUXBASE%%/etc/makemkv/devices/$LOC/scsi_generic/$SGDEV
		mkdir -p %%LINUXBASE%%/etc/makemkv/drivers/sr
		ln -s ../../devices/$LOC %%LINUXBASE%%/etc/makemkv/drivers/sr/$LOC
		echo 5 >%%LINUXBASE%%/etc/makemkv/devices/$LOC/type
	fi
done < $TMPFIFODIR/campipe

if [ -z "$SGDEVS" ]; then
	cat <<EOF
No usable optical drives found. Make sure your drive (/dev/cd*) is available.
Check the output of "camcontrol devlist".

When finished, re-run this script (update-makemkv-drives).
EOF
	exit 1
fi

echo devices linked: $SGDEVS.

echo "When your configuration changes, re-run this script (update-makemkv-drives)."