hybris-installer/META-INF/com/google/android/update-binary

#!/sbin/sh
# An extensible custom Hybris Installer script.
# https://git.io/fjMH9

# Details about this version:
#   Device  : %DEVICE%
#   Release : %VERSION%
#   Date    : %DATE%
#   Size    : ~%IMAGE_SIZE%

# >>> TWRP init >>>

OUTFD="/proc/self/fd/$2" # e.g. "/proc/self/fd/28"
ZIPFILE="$3"             # e.g. "/sdcard/%DST_PKG%.zip"
FILES="/tmp/hybris-installer"

# Set progress bar percentage using a fraction ($1) in range 0.00 - 1.00
set_progress() { echo -e "set_progress $1\n" > $OUTFD; }

# Print some text ($1) on the screen
ui_print() { [ -z "$1" ] && echo -e "ui_print  \nui_print" > $OUTFD || echo -e "ui_print $@\nui_print" > $OUTFD; }

# Log some text ($1) for script debugging
log() { echo "hybris-installer: $@"; }

# Remove package residue files from /tmp and unmount partitions
cleanup() { log "Cleaning up..."; umount /system; rm -rf $FILES/; }

# Before quitting with an exit code ($1), show a message ($2)
abort() { ui_print "E$1: $2"; cleanup; exit $1; }

# <<< TWRP init <<<

# Constants & variables
VERSION="%VERSION%" # e.g. "3.2.0.12 (Torronsuo)"
TARGET_LOS_VER="%LOS_VER%" # e.g. "16.0"
TARGET_DEVICE="%DEVICE%" # e.g. "cheeseburger"
CURRENT_DEVICE=`getprop ro.product.device`
ROOT="/data/.stowaways/sailfishos"
FORCE_REINSTALL=0

# >>> Sanity checks >>>

# Device
[ "$CURRENT_DEVICE" != "$TARGET_DEVICE" ] && abort 7 "This package is for '$TARGET_DEVICE' devices; this is a '$CURRENT_DEVICE'."

# ext4 check for /cache & /data
(mount | grep -q /cache || mount /cache) || abort 1 "Couldn't mount /cache!"
mount | grep -q "/cache.*ext4" || abort 2 "Cache is NOT formatted as ext4; check out 'Wipe > Advanced' from TWRP!"
(mount | grep -q /data || mount /data) || abort 3 "Couldn't mount /data; running e2fsck and rebooting may help."
mount | grep -q "/data.*ext4" || abort 4 "Data is NOT formatted as ext4; check out 'Wipe > Advanced' from TWRP!"

# Treble
[ -r /dev/block/bootdevice/by-name/vendor ] || abort 5 "A vendor partition doesn't exist; you need to do an OTA from OxygenOS 5.1.5 to 5.1.6!"

# Android
(mount | grep -q /system || mount /system) || abort 6 "Couldn't mount /system!"
if [ `cat /system/build.prop | grep lineage.build.version= | cut -d'=' -f2` != "$TARGET_LOS_VER" ]; then
	if [ ! -f /tmp/sfos_flash_confirm ]; then
		touch /tmp/sfos_flash_confirm
		abort 8 "If you don't know what you're doing: please factory reset & dirty flash LineageOS $TARGET_LOS_VER before this zip. Otherwise reflash again to confirm force flashing of SFOS."
	fi
	log "About to perform forced flash of SFOS"
fi
[ -f /system/bin/toybox ] || abort 9 "Your ROM doesn't ship with toybox; extracting of SFOS rootfs isn't possible!"
if [ -f $ROOT/etc/os-release ]; then
	if [ ! -f /tmp/sfos_fresh_confirm ]; then
		touch /tmp/sfos_fresh_confirm
		abort 10 "This zip is NOT an OTA and should not be treated like one. Please reflash once more to confirm a full SFOS reinstall!"
	fi
	FORCE_REINSTALL=1
	log "About to perform forced reinstall of SFOS; preserving droid-boot image..."
	mv $ROOT/boot/droid-boot.img /tmp/
fi
rm -f /tmp/sfos_f{la,re}sh_confirm

# <<< Sanity checks <<<

# >>> Script >>>

# Reset shown progress bar to 0%
set_progress 0

# Calculate centering offset indent on left
offset=`echo -n $VERSION | wc -m` # Character length of the version string
offset=`expr 52 - 23 - $offset`   # Remove constant string chars from offset calculation
offset=`expr $offset / 2`         # Get left offset char count instead of space on both sides

# Build the left side indentation offset string
for i in `seq 1 $offset`; do indent="${indent} "; done

# Splash
ui_print
ui_print "-===============- Hybris Installer -===============-"
ui_print
ui_print "                          .':oOl."
ui_print "                       ':c::;ol."
ui_print "                    .:do,   ,l."
ui_print "                  .;k0l.   .ll.             .."
ui_print "                 'ldkc   .,cdoc:'.    ..,;:::;"
ui_print "                ,o,;o'.;::;'.  'coxxolc:;'."
ui_print "               'o, 'ddc,.    .;::::,."
ui_print "               cl   ,x:  .;:c:,."
ui_print "               ;l.   .:ldoc,."
ui_print "               .:c.    .:ll,"
ui_print "                 'c;.    .;l:"
ui_print "                   :xc.    ,o'"
ui_print "                   'xxc.   ;o."
ui_print "                   :l'c: ,lo,"
ui_print "                  ,o'.ooclc'"
ui_print "                .:l,,x0o;."
ui_print "              .;llcldl,"
ui_print "           .,oOOoc:'"
ui_print "       .,:lddo:'."
ui_print "      oxxo;."
ui_print
ui_print "${indent}Installing Sailfish OS $VERSION"
ui_print "                   Please wait ..."

# Start
log "Extracting package '$ZIPFILE'..."
mkdir -p $FILES/
unzip -o "$ZIPFILE" -x META-INF/* -d $FILES/

log "Extracting SFOS rootfs..."
ARCHIVE="$FILES/sfos-rootfs.tar.bz2"
rm -rf $ROOT/
mkdir -p $ROOT/
/system/bin/toybox tar -xj -f $ARCHIVE -C $ROOT/ || abort 11 "Couldn't extract SFOS rootfs!"
rm $ARCHIVE

log "Fixing up init scripts..."
sed -e "/extraenv/s/^/#/g" -e "/import \/init.\${ro.hardware}.rc/s/^/#/" -e "/ro.zygote/s/^/#/g" -e "/start update_verifier/s/^/#/g" \
    -e "s/\/cpus\ /\/cpuset.cpus /g" -e "s/\/cpus$/\/cpuset.cpus/g" -e "s/\/mems\ /\/cpuset.mems /g" -e "s/\/mems$/\/cpuset.mems/g" \
    -i $ROOT/init.rc || log "Couldn't fix-up init script!"
rm $ROOT/init.extraenv.armeabi-v7a.rc

log "Disabling forced encryption in vendor fstab..."
(umount /vendor &> /dev/null; mount -o rw /vendor && sed "s/fileencryption/encryptable/" -i /vendor/etc/fstab.qcom) || log "Couldn't disable forced encryption!"
umount /vendor &

if [ "$FORCE_REINSTALL" = "0" ]; then
	log "Backing up droid-boot image..."
	dd if=/dev/block/bootdevice/by-name/boot of=$ROOT/boot/droid-boot.img
elif [ -f /tmp/droid-boot.img ]; then
	log "Moving back droid-boot image..."
	mv /tmp/droid-boot.img $ROOT/boot/
fi

log "Writing hybris-boot image..."
dd if=$ROOT/boot/hybris-boot.img of=/dev/block/bootdevice/by-name/boot || abort 12 "Couldn't write Hybris boot image!"

# <<< Script <<<

# Succeeded.
log "Sailfish OS installed successfully."
ui_print "            All done, enjoy your new OS!"
ui_print
cleanup
exit 0