#!/usr/bin/env zsh
# Copyright (c) 2017 Dyne.org Foundation
# live-sdk is written and maintained by Ivan J. <parazyd@dyne.org>
#
# This file is part of live-sdk
# devuan-minimal-live.blend is maintained by KatolaZ
#
# This source code is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This software is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this source code. If not, see <http://www.gnu.org/licenses/>.

BLENDPATH="${BLENDPATH:-$(dirname $0)}"

source $BLENDPATH/config

blend_release_path=$BLENDPATH/$release/
blend_scripts=${blend_release_path}/scripts

###source $BLENDPATH/$release/devuan-minimal-live.release

blend_preinst() {
	fn blend_preinst
	req=(blend_name username userpass)
	ckreq || return 1

	notice "executing $blend_name preinst"

	add-user $username $userpass

	notice "copying blend-specific debs"
	## TODO: copy the custom debs
	##cp -fv "$blend_release_path"/custom_debs/*.deb "$R/extra/custom-packages"
}

blend_postinst() {
	fn blend_postinst
	req=(strapdir blend_name)
	ckreq || return 1

	notice "executing $blend_name postinst"

	[[ "$mkefi" = "yes" ]] && {
		iso_make_efi
		iso_write_grub_cfg
	}

	## TODO: ENABLE THIS
	#install-custdebs || zerr
	pushd "$strapdir"
		sudo rsync -avx --no-o --no-g "$blend_release_path"/rootfs_overlay/* . || zerr
		sudo chmod 755 etc/init.d/boot_beep
		## TODO:
		## 		insserv boot_beep
	popd

	blend_finalize || zerr
}

iso_write_isolinux_cfg() {
	fn iso_write_isolinux_cfg "(override)"
	req=(workdir arch username)
	ckreq || return 1

	notice "copying isolinux overlay"
	sudo mkdir -p "$workdir"/binary/{live,isolinux}
	sudo cp -rav "$blend_release_path"/isolinux_overlay/* "$workdir"/binary/isolinux/
	#[[ -n "$hookscripts" ]] && {
	#	sudo cp -av "$BLENDPATH"/hooks "$workdir"/binary/live/
	#}
}

# create /boot and /efi for uefi.
# uefi code borrowed and adapted from David Hare, who borrowed and adapted it
# from similar scripts by Colin Watson and Patrick J. Volkerding.
iso_make_efi() {
	fn iso_make_efi
	req=(workdir efi_work)
	ckreq || return 1

	notice "creating efi boot files"

	tempdir="$(mktemp -d /tmp/work_temp.XXXX)"
	# for initial grub.cfg
	mkdir -p "$tempdir"/boot/grub


	cat >"$tempdir"/boot/grub/grub.cfg <<EOF
search --file --set=root /isolinux/isolinux.cfg
set prefix=(\$root)/boot/grub
source \$prefix/x86_64-efi/grub.cfg
EOF

	mkdir -p "$efi_work"
	pushd "$efi_work"

	# start with empty directories.
	rm -rf boot; mkdir -p boot/grub/x86_64-efi
	rm -rf efi ; mkdir -p efi/boot

	# second grub.cfg file
	for i in $(find $strapdir/usr/lib/grub/x86_64-efi -name 'part_*.mod'); do
		print "insmod $(basename $i)" >> boot/grub/x86_64-efi/grub.cfg
	done

	# Additional modules so we don't boot in blind mode.
	# I don't know which ones are really needed.
	efimods=(
		efi_gop
		efi_uga
		ieee1275_fb
		vbe
		vga
		video_bochs
		video_cirrus
		jpeg
		png
		gfxterm
	)
	for i in $efimods; do
		print "insmod $i" >> boot/grub/x86_64-efi/grub.cfg
	done

	print "source /boot/grub/grub.cfg" >> boot/grub/x86_64-efi/grub.cfg

	pushd "$tempdir"
		# make a tarred "memdisk" to embed in the grub image
		tar -cvf memdisk boot

		# make the grub image
		grub-mkimage -O "x86_64-efi" -m "memdisk" -o "bootx64.efi" \
			-p '(memdisk)/boot/grub' \
				search iso9660 configfile normal memdisk tar cat \
				part_msdos part_gpt fat ext2 ntfs ntfscomp hfsplus \
				chain boot linux
	popd

	# copy the grub image to efi/boot (to go later in the device's root)
	cp "$tempdir"/bootx64.efi efi/boot

	# Do the boot image "boot/grub/efiboot.img"
	dd if=/dev/zero of=boot/grub/efiboot.img bs=1K count=1440
	mkfs.vfat -F 12 boot/grub/efiboot.img

	sudo mkdir img-mnt
	sudo mount -o loop boot/grub/efiboot.img img-mnt
	sudo mkdir -p img-mnt/efi/boot
	sudo cp "$tempdir"/bootx64.efi img-mnt/efi/boot/

	# copy modules and font
	cp $strapdir/usr/lib/grub/x86_64-efi/* boot/grub/x86_64-efi/

	# if this doesn't work try another font from the same place (grub's default, unicode.pf2, is much larger)
	# Either of these will work, and they look the same to me. Unicode seems to work with qemu. -fsr
	# cp /usr/share/grub/ascii.pf2 boot/grub/font.pf2
	cp $strapdir/usr/share/grub/unicode.pf2 boot/grub/font.pf2

	# copy splash
	sudo cp -rav "$blend_release_path"/isolinux_overlay/splash.png boot/grub/splash.png

	# Cleanup efi temps
	sudo umount img-mnt
	sudo rmdir img-mnt
	rm -rf "$tempdir"

	popd


	# Copy efi files to iso
	pushd $workdir
	sudo rsync -avx "$efi_work"/boot binary/
	sudo rsync -avx "$efi_work"/efi  binary/
	popd

}


## UNUSED
iso_write_grub_cfg() {
	fn iso_write_grub_cfg "(override)"
	req=(workdir arch username)
	ckreq || return 1

	notice "writing grub configuration"

	# Do the main grub.cfg (which gets loaded last):
	cat <<EOF | sudo tee ${workdir}/binary/boot/grub/grub.cfg
if loadfont $prefix/font.pf2 ; then
  set gfxmode=640x480
  insmod efi_gop
  insmod efi_uga
  insmod video_bochs
  insmod video_cirrus
  insmod gfxterm
  insmod jpeg
  insmod png
  terminal_output gfxterm
fi

background_image /boot/grub/splash.png
set menu_color_normal=white/black
set menu_color_highlight=dark-gray/white
set timeout=6

menuentry "${os}-live (${arch})" {
    set gfxpayload=keep
    linux   /live/vmlinuz boot=live username=$username
    initrd  /live/initrd.img
}

menuentry "Other language" {
	set gfxpayload=keep
	linux /live/vmlinuz boot=live username=$username hooks=file:///lib/live/mount/medium/live/hooks/fix-lang.sh locales=it_IT.UTF-8
	initrd /live/initrd.img
}

menuentry "${os}-live (load to RAM)" {
    set gfxpayload=keep
    linux   /live/vmlinuz boot=live username=$username toram
    initrd  /live/initrd.img
}

menuentry "${os}-live (failsafe)" {
    set gfxpayload=keep
    linux   /live/vmlinuz boot=live username=$username noapic noapm nodma nomce nolapic nosmp vga=normal
    initrd  /live/initrd.img
}

menuentry "Memory test" {
	linux /live/memtest
}

EOF
}

## put the "create_initrd.sh" script

##func
put_create_initrd(){

	sudo cp ${blend_scripts}/create_initrd.sh ${strapdir}/ >/dev/null

	## Now we make it executable
	sudo chmod 755 ${strapdir}/create_initrd.sh
}

## put the "finalize" script, that does the final work

## func
put_finalize(){

	cat <<EOF | sudo tee ${strapdir}/finalize >/dev/null
#!/bin/sh

## permissions
for i in cdrom floppy audio dip video plugdev netdev lpadmin scanner; do
	gpasswd -a ${username} \$i
done

chsh -s "${default_shell}" ${username}
chown -R 1000:1000 /home/${username}

# Not sure if this has been fixed (in devuan-baseconf?)
mv /data/etc/apt/apt.conf.d/05disable-suggests /etc/apt/apt.conf.d/
rm -rf /data

rm -f /etc/fstab
rm -f /etc/popularity-contest.conf

# For ascii if no display manager is used. Maybe this should have a
# contitional that's turned on/off in the config?
# echo "needs_root_rights=yes" >> /etc/X11/Xwrapper.config

# Disable contrib and non-free after installing firmware.
sed -i 's/contrib//g' /etc/apt/sources.list
sed -i 's/non-free//g' /etc/apt/sources.list

## insert  service boot_beep
insserv boot_beep

##  Configure framebuffer
setcap 'cap_sys_tty_config+ep' /usr/bin/fbterm                    
chmod u+s /usr/bin/fbterm   

## Make initramfs

SLIM_INITRD=initrd_devuan.img
MICRO_INITRD=initramfs-\$(uname -r).img
INITRD_COMPR="xz --check=crc32 --x86 -6 -"
  

/create_initrd.sh /boot/initrd.img-`uname -r` /boot/\${SLIM_INITRD} \
    "\${INITRD_COMPR}" /boot/\${MICRO_INITRD}

unlink /initrd.img
ln -s /boot/\${MICRO_INITRD} /initrd.img

## rm create_initrd.sh
##sudo rm /create_initrd.sh

## package list
dpkg -l | awk '/^ii/ { print $2 " " $3 }' > /home/${username}/package_list

apt-get update
apt-get clean
updatedb
EOF
}



blend_finalize() {
	fn blend_finalize
	req=(strapdir username default_shell)
	ckreq || return 1

	put_create_initrd 

	put_finalize

	chroot-script -d finalize || zerr
}