update-binary

#!/sbin/sh

# Exit immediately if the device is not Treble-enabled
if [ ! $(getprop ro.treble.enabled) ]
    then echo -e "ui_print Your device is not Treble-enabled!" >> /proc/self/fd/${2}
    exit 1
fi

# Exit immediately if a command fails
set -e

# Extract the package to a temporary location
unzip -oq ${3} -d "/tmp/MulchWebViewInstaller"

# Create faux mountpoints
mkdir /picodroid_system
mkdir /picodroid_vendor

# Mount the neccesary partitions
mount -o rw $(readlink -f $(cd /dev && find /dev/block -type l -name system$(getprop ro.boot.slot_suffix) | head -n 1 )) /picodroid_system
mount -o rw $(readlink -f $(cd /dev && find /dev/block -type l -name vendor$(getprop ro.boot.slot_suffix) | head -n 1 )) /picodroid_vendor

# Copy the overlay to the appropriate location
cp /tmp/MulchWebViewInstaller/vendor/overlay/treble-overlay-mulch-webview.apk /picodroid_vendor/overlay

# Copy the OTA survival script to the appropriate location
if [ -d /picodroid_system/system/addon.d ]
    then cp /tmp/MulchWebViewInstaller/system/addon.d/99-mulch-webview.sh /picodroid_system/system/addon.d
fi

# Make the script executable
chmod 755 /picodroid_system/system/addon.d/99-mulch-webview.sh

# Unmount the previously mounted partitions
umount -l /picodroid_system
umount -l /picodroid_vendor

# Delete de faux mountpoints
rmdir /picodroid_system
rmdir /picodroid_vendor

# Clean up the installation files
rm -rf /tmp/MulchWebViewInstaller

# Inform the user that the update has been successful
echo -e "ui_print Update successfully installed!" >> /proc/self/fd/${2}
echo -e "ui_print You can now install Mulch SystemWebView as a regular app!" >> /proc/self/fd/${2}