#!/bin/bash
set -e

function deploysets {
	for set in base comp etc man misc modules text; do
		echo -n $set...
		bsdtar -xJp --numeric-owner -f $repo/$set.tar.xz -C /var/tmp/tree/ && echo done
	done; unset set
}

source ${0%/*}/installffs.conf

[[ -z $name ]] && echo define name && exit 1
[[ -z $repo ]] && echo define repo && exit 1
[[ -z $image ]] && echo define image && exit 1
[[ -z $tools ]] && echo define tools && exit 1
[[ -z $zone ]] && echo define zone && exit 1

[[ ! -x $tools/bin/nbmakefs ]] && echo $tools/bin/nbmakefs executable not found && exit 1
[[ ! -x `which bsdtar` ]] && echo install libarchive first && exit 1
[[ ! -x `which fallocate` ]] && echo install util-linux first && exit 1

echo
echo prepare /var/tmp/tree/
echo

rm -rf /var/tmp/tree/
mkdir /var/tmp/tree/
deploysets

ln -sf ../usr/share/zoneinfo/$zone /var/tmp/tree/etc/localtime 2>/dev/null

#no network config yet hence no sshd
cat > /var/tmp/tree/etc/rc.conf <<EOF
. /etc/defaults/rc.conf
rc_configured=yes
sshd=yes

# xen guest
wscons=no
no_swap=yes
savecore=no

# expand the makefs image
# http://mail-index.netbsd.org/tech-toolchain/2020/10/03/msg003873.html
resize_root=YES
resize_root_flags=-p
resize_root_postcmd="/sbin/reboot -n"

EOF
#resize_disklabel=yes

echo $name > /var/tmp/tree/etc/myname
echo 127.0.0.1 $name >> /var/tmp/tree/etc/hosts

cat > /var/tmp/tree/etc/fstab <<EOF
/dev/xbd0a / ffs rw 0 1
ptyfs /dev/pts ptyfs rw 0 0
tmpfs /tmp tmpfs rw 0 0
#procfs /proc procfs ro,linux 0 0
EOF
#/dev/xbd0d / ext2fs rw 0 1

cat >> /var/tmp/tree/etc/rc.local <<EOF
chsh -s /bin/ksh root
useradd -D -s /bin/ksh
EOF
echo

du -sh /var/tmp/tree/
#v9		772M
#current aug 20	784M

echo
echo create $image
echo

# -t ffs -o v=2,o=time -s 2g $name.ffs2 tree/
# -t ffs -o v=2,o=time -s 3g $name.ffs2 tree/
# -N tree/etc -x -F tree/METALOG.sanitised -s 2g -f 100000 netbsd.ffs tree/
# -N tree/etc -s 2g -f 100000 netbsd.ffs tree/

# ffsv2 prevents linux from mounting it
# -b 0 -- no free blocks needed
$tools/bin/nbmakefs -t ffs -b 0 $image /var/tmp/tree/
echo

#echo sparse?
#ls -lhF $image
#du -sh $image
#echo

echo -n cleaning-up...
rm -rf /var/tmp/tree/ && echo done
echo

echo file-system is ready as $image
echo you now need to expand it by booting it once
echo