#!/bin/sh
set -e

# Set up quik, a boot loader for OldWorld PowerMacs and some non-Apple
# powerpc systems.

. /usr/share/debconf/confmodule

log () {
	logger -t quik-installer "$@"
}

error () {
	log "error: $@"
}

info () {
	log "info: $@"
}

writefile () {
	cat >>"$1" || die quik-installer/conferr "Error writing $2"
}

findfs () {
	mount | grep "on /target${1%/} " | tail -n1 | cut -d' ' -f1
}

db_progress START 0 0 quik-installer/progress

die () {
	template="$1"
	shift

	error "$@"
	db_input critical "$template" || [ $? -eq 30 ]
	db_go
	db_progress STOP
	exit 10
}

# Install quik in /target

db_progress INFO quik-installer/progress/apt-install

# Yes, it's a bit silly that we install yaboot. However, where else are we
# going to get ofpath?
if ! apt-install quik yaboot powerpc-utils; then
	info "Calling 'apt-install quik yaboot powerpc-utils' failed"
	# Hm, unable to install quik into /target/, what should we do?
	db_input critical quik-installer/apt-install-failed || [ $? -eq 30 ]
	if ! db_go; then
		db_progress STOP
		exit 10 # back up to menu
	fi
	db_get quik-installer/apt-install-failed
	if [ "$RET" != true ]; then
		db_progress STOP
		exit 10
	fi
fi

# Find the root partition and check that quik can cope with it.

db_progress STEP 1
db_progress INFO quik-installer/progress/checking

mountvirtfs () {
	fstype="$1"
	path="$2"
	if grep -q "[[:space:]]$fstype\$" /proc/filesystems && \
	   ! grep -q "^[^ ]\+ \+$path " /proc/mounts; then
		mkdir -p "$path" || \
			die quik-installer/mounterr "Error creating $path"
		mount -t "$fstype" "$fstype" "$path" || \
			die quik-installer/mounterr "Error mounting $path"
		trap "umount $path" HUP INT QUIT KILL PIPE TERM EXIT
	fi
}

# ofpath needs proc in /target
mountvirtfs proc /target/proc
# ofpath needs sysfs in /target for 2.6
mountvirtfs sysfs /target/sys

root_devfs="$(findfs /)"
[ "$root_devfs" ] || die quik-installer/noroot 'No root partition found'

root="$(mapdevfs "$root_devfs")"
info "root partition: $root"

boot_devfs="$(findfs /boot)"
[ "$boot_devfs" ] || boot_devfs="$root_devfs"
boot="$(mapdevfs "$boot_devfs")"
info "boot partition: $boot"

# The partition where quik is installed must be ext2 and
# quik must be installed on the first disk
if ! grep "$boot[[:space:]]/target.*[[:space:]]ext2[[:space:]]" /proc/mounts \
   >/dev/null; then
	die quik-installer/boot_not_ext2 '/boot not ext2'
fi
if [ "${boot#/dev/hd}" != "$boot" ] && [ "${boot#/dev/hda}" = "$boot" ]; then
	die quik-installer/boot_not_on_first_disk '/boot not on first disk'
fi

# Generate quik.conf

db_progress STEP 1
db_progress INFO quik-installer/progress/conf

partnr="`printf %s "$boot" | sed 's/[^0-9]*\([0-9]\)/\1/'`"
disk="`printf %s "$boot" | sed 's/[0-9].*//'`"

if [ "$boot_devfs" != "$root_devfs" ]; then
	quikconf=/target/boot/etc/quik.conf
	quikinstall="quik -v -f -C /boot/etc/quik.conf"
	mkdir -p /target/boot/etc
	ln -sf /boot/etc/quik.conf /target/etc/quik.conf
	kernel=/vmlinux
	if [ -e /target/boot/initrd.img ]; then
		initrd=/initrd.img
	else
		initrd=
	fi
else
	quikconf=/target/etc/quik.conf
	quikinstall="quik -v -f"
	rm -f /target/etc/quik.conf
	if [ -e /target/boot/vmlinux ]; then
		kernel=/boot/vmlinux
	else
		kernel=/vmlinux
	fi
	if [ -e /target/boot/initrd.img ]; then
		initrd=/boot/initrd.img
	elif [ -e /target/initrd.img ]; then
		initrd=/initrd.img
	else
		initrd=
	fi
fi

rm -f $quikconf

writequikconf() {
	writefile $quikconf quik.conf
}

writequikconf <<EOF
## quik.conf generated by debian-installer

init-message="Debian GNU/Linux PowerPC"
default=Linux
timeout=100
root=$root
partition=$partnr
image=$kernel
	label=Linux
	read-only
EOF
if [ "$initrd" ]; then
	writequikconf <<EOF
	initrd=$initrd
EOF
fi
if [ "$video" ]; then
	writequikconf <<EOF
	append="video=$video"
EOF
fi

# Install bootstrap loader

db_progress STEP 1
db_progress INFO quik-installer/progress/install

ARCH="$(archdetect)"
info "architecture: $ARCH"

# Warn that the system may not be bootable after this.
case $ARCH in
	powerpc/powermac_oldworld)
	WARNING_TEMPLATE=quik-installer/oldworld_warning
	;;
	*)
	WARNING_TEMPLATE=quik-installer/non_oldworld_warning
	;;
esac
db_input critical "$WARNING_TEMPLATE" || [ $? -eq 30 ]
db_go || exit 10
db_get "$WARNING_TEMPLATE"
[ "$RET" = true ] || exit 10

log-output -t quik-installer chroot /target $quikinstall || \
	die quik-installer/quikerr "quik failed with exit status $?"

# Configure OpenFirmware (OldWorld only)

db_progress STEP 1
db_progress INFO quik-installer/progress/openfirmware

if [ "$ARCH" = powerpc/powermac_oldworld ]; then
	ofpath="`chroot /target ofpath "$disk"`"
	info "ofpath $disk: $ofpath"
	log-output -t quik-installer chroot /target nvsetenv boot-device "${ofpath}0" || \
		die quik-installer/boot-device_failed \
		    "nvsetenv boot-device \"${ofpath}0\" failed with exit status $?"
	log-output -t quik-installer chroot /target \
		nvsetenv boot-command "begin ['] boot catch 1000 ms cr again" ||
		die quik-installer/boot-command_failed \
		    "nvsetenv boot-command failed with exit status $?"
fi

# Done!

db_progress STEP 1
db_progress STOP