#!/bin/rc
# loadfossil - populate a fossil partition or file
#
# due to name clashes in /srv, will only work on a machine
# without a fossil named `fossil' already running.

rfork en

fn killfossil {
	sleep 1
	unmount /n/f &
	sleep 1
	rm -f /srv/^(fossil fossil.open fscons fscons.open)
	kill fossil | rc
	sleep 1
}

fn sendexpect {		# send expect timeout
	echo $1
	if(! dial/expect -qt $3 $2)
		echo -n 'no '^$"1^'...' > /dev/cons
}

fn usage {
	echo usage: $argv0 partition root proto fossil.conf >[1=2]
	exit usage
}

fn sigexit {
	rm -f /tmp/fossil-no-list.conf
	exit
}
fn sigint sighup sigterm {
	rm -f /tmp/fossil-no-list.conf
	killfossil
	exit note
}

# process arguments
if (! ~ $#* 4)
	usage
argv0=$0
fosspart=$1
srcroot=$2
proto=$3
fossconf=$4

if (test -e /srv/fossil -o -e /srv/fossil.open) {
	echo $0: /srv/fossil* exists, not safe to start a new fossil >[1=2]
	exit fossil-already-running
}

# initialise fossil
fossil/flfmt -y $fosspart

# install listen-less config for fossil creation
{
	grep -v '^listen ' $fossconf
	echo create /active/adm adm sys d775
	echo create /active/adm/users adm sys 664
} >/tmp/fossil-no-list.conf
fossil/conf -w $fosspart /tmp/fossil-no-list.conf

# start fossil
fossil/fossil -f $fosspart
mount -cC /srv/fossil.open /n/f

# set up /adm/users
cp /adm/users /n/f/adm
{
	echo
	dial/drain &
	sleep 2
	sendexpect 'users -r /active/adm/users' ': ' 5
} </srv/fscons.open >>/srv/fscons.open

# remount with new users
unmount /n/f
mount -cC /srv/fossil.open /n/f

# populate fossil
@ {
	# logs are boring, make them all appear empty
	chmod +arw /tmp/empty-log >/tmp/empty-log
	cd $srcroot/sys/log && {
		for (f in [0-9a-z]* */*)
			if (! ~ $f httpd mkfile smtpdb timesync.d vac year)
				bind /tmp/empty-log $f
	}
	cd /tmp
	disk/mkfs -u $srcroot/adm/users -U -d /n/f -s $srcroot $proto
}

# stop fossil gracefully
{
	echo
	dial/drain &
	sleep 2
	sendexpect 'fsys all sync' ': ' 120
	sendexpect 'fsys all halt' ': ' 5
} </srv/fscons.open >>/srv/fscons.open
killfossil

# install permanent fossil configuration
fossil/conf -w $fosspart $fossconf