#!/bin/sh
# $NetBSD: mkimage,v 1.40 2013/06/16 13:47:42 jakllsch Exp $
#
# Copyright (c) 2013 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Christos Zoulas.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. Neither the name of The NetBSD Foundation nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#

set -e

DIR="$(cd "$(dirname "$0")" && pwd)"
PROG="$(basename "$0")"

DISKLABEL=${TOOL_DISKLABEL:-disklabel}
FDISK=${TOOL_FDISK:-fdisk}
GZIP=${TOOL_GZIP:-gzip}
MAKEFS=${TOOL_MAKEFS:-makefs}
MTREE=${TOOL_MTREE:-mtree}

src="/usr/src"
release="/usr/obj/evbarm/release"
sets="base comp etc games man misc modules text"
xsets="xbase xcomp xetc xfont xserver" 
minfree="10%"
bar="==="

tmp="$(mktemp -d "/tmp/$PROG.XXXXXX")"
mnt="${tmp}/mnt"
mkdir -p "${mnt}/etc" "${mnt}/dev" "${mnt}/boot"

trap "cleanup" 0 1 2 3 15

cleanup() {
	case "$tmp" in
	/tmp/$PROG.*)	rm -fr "$tmp";;
	esac
}

getsize() {
	set -- $(ls -l $1)
	echo $5
}

usage() {
	cat << EOF 1>&2
Usage: $PROG -h <host-arch> [-bmx] [-K <kerneldir>] [-S <srcdir>] [-D <destdir>] [-c <custom-files-dir>] [-s <Mb size>] [<image>]

-b	Boot only, no sets loaded
-d	Add the debug sets
-m	Mimimize disk writes for sd cards
-x	Load the x sets too, not just the base ones
EOF
	exit 1
}

# First pass for options to get the host and src directories
OPTS="K:D:S:bc:dh:ms:x"
while getopts "$OPTS" f
do
	case $f in
	h)	h="$OPTARG";;
	S)	src="$OPTARG";;
	*)	;;
	esac
done

if [ -z "$h" ]
then
	usage
fi

if [ ! -f "${DIR}/conf/${h}.conf" ]
then
	echo $PROG: ${DIR}/conf/${h}.conf is not present 1>&2
	exit 1
fi

. "${DIR}/conf/${h}.conf"

selected_sets="$sets"
dsets=false
xsets=false
minwrites=false

OPTIND=1
while getopts "$OPTS" f
do
	case $f in
	D)	release="$OPTARG";;
	K)	kernel="$OPTARG";;
	S)	;;
	b)	bootonly="true";;
	d)	dsets=true
		selected_sets="$selected_sets debug"
		if $xsets; then
			selected_sets="$selected_sets xdebug"
		fi
		;;
	c)	custom="$OPTARG";;
	h)	;;
	m)	minwrites=true;;
	s)	size="$OPTARG";;
	x)	xsets=true
		selected_sets="$selected_sets $xsets"
		if $dsets; then
		    selected_sets="$selected_sets xdebug"
		fi
		;;
	*)	usage;;
	esac
done

shift $(( $OPTIND - 1 ))
if [ -n "$1" ]; then
	# take the next argument as being the image name
	image="$1"
	shift
fi

case "$image" in
*.gz)	compress=true; image="${image%.gz}";;
*)	compress=false;;
esac

if [ -z "$bootonly" ]; then
	echo ${bar} configuring sets ${bar}
	(echo '/set type=dir uname=root gname=wheel mode=0755'
	for i in $selected_sets; do
		s="${release}/etc/mtree/set.$i"
		if [ -f "$s" ]; then
			cat "$s"
		fi
	done) > "$tmp/selected_sets"
fi

make_fstab
customize
populate

if [ -z "$bootonly" ]; then
	(cd ${mnt}; ${MTREE} -N ${release}/etc -c -k all | 
	    ${MTREE} -N ${release}/etc -C -k all) >> "$tmp/selected_sets"
fi
if [ -n ${msdosid} ]; then
	echo ${bar} Populating msdos filesystem ${bar}
	${MAKEFS} -N ${release}/etc -t msdos \
	    -O $((${init} / 2))m -s $((${boot} / 2 + ${init} / 2))m ${image} ${mnt}/boot
fi

if [ -z "$bootonly" ]; then
	echo ${bar} Populating ffs filesystem ${bar}
	${MAKEFS} -N ${release}/etc -t ffs -rx \
	    -O $(((${init} + ${boot} + ${swap}) / 2))m \
		-o d=4096 \
	    -b $((${extra}))m \
	    -F "$tmp/selected_sets" ${image} "${release}" "${mnt}"
fi

if [ "${size}" = 0 ]; then
	size="$(getsize "${image}")"
fi
newsize=$((${size} / 2 / 1024))

echo ${bar} Adding label ${bar}
make_label > ${tmp}/label
${DISKLABEL} -R -F ${image} ${tmp}/label
if [ -n ${msdosid} ]; then
	echo ${bar} Running fdisk ${bar}
	initsecs=$((${init} * 1024))
	bootsecs=$((${boot} * 1024))
	${FDISK} -f -u -0 -s ${msdosid}/${initsecs}/${bootsecs} -F ${image}
fi

if $compress; then
	echo ${bar} Compressing image ${bar}
	rm -f "${image}.gz"
	${GZIP} -9 ${image}
	image="${image}.gz"
fi

echo ${bar} Image is ${image} ${bar}