# Instructions for creating a PureOS Image for PinePhone by mozzwald
########################################################################
# You will need u-boot-tools package for your distro and it helps
# to have binfmt and qemu packages for chrooting to the image.
# Paths and devices may be different on your system. Always verify
# before blindly copying and pasting commands.

# Make a new working directory
mkdir ~/purepp
cd ~/purepp

# Download and extract PinePhone phosh image (check for newer releases if you like)
wget https://images.postmarketos.org/pinephone/pine-pinephone-20200218-phosh.img.xz
unxz -d pine-pinephone-20200218-phosh.img.xz

# Download and extract PureOS Librem 5 image (check for newer releases if you like)
wget http://downloads.pureos.net/amber/phone/gnome/librem5/2020-02-25/librem5.img.xz
unxz -d librem5.img.xz

# Make temporary dirs for mounting images
mkdir pmos-boot pmos-root pureos-boot pureos-root

# List used loop devices
losetup -a
# List all loop devices
ls /dev/loop*

# The remaining commands should be run with sudo or as root user (sudo su)

# Pick an unused loop device (5 in my case) and mount pmOS image with partitions
losetup -P /dev/loop5 pine-pinephone-20200218-phosh.img

# Pick an unused loop device (6 in my case) and mount PureOS image with partitions
losetup -P /dev/loop6 librem5.img

# Get pmOS PinePhone bootloader
dd if=/dev/loop5 of=uboot-pmos.bin count=2048

# Put pmOS PinePhone bootloader on PureOS image
dd if=uboot-pmos.bin of=/dev/loop6 bs=1024 skip=8 seek=8

# Mount partitions
mount /dev/loop5p1 pmos-boot
mount /dev/loop5p2 pmos-root
mount /dev/loop6p1 pureos-boot
mount /dev/loop6p2 pureos-root

# Copy PinePhone kernel & dtb to PureOS image
cp pmos-boot/vmlinuz-postmarketos-allwinner pureos-boot/
cp pmos-boot/sun50i-a64-pinephone.dtb pureos-boot/

# Copy PinePhone modules to PureOS image
cp -pRv pmos-root/lib/modules/5.5.0 pureos-root/lib/modules/

# Copy PinePhone firmware to PureOS image
cp -pRv pmos-root/lib/firmware pureos-root/lib/

# Make u-boot initramfs from PureOS initramfs
mkimage -A arm -O linux -T ramdisk -C gzip -d pureos-boot/initrd.img pureos-boot/uInitrd.img

# Get uboot-script
wget https://mozzwald.com/pp/pureos-uboot-script.cmd -O pureos-boot/boot.cmd

# Compile uboot script
mkimage -A arm64 -T script -C none -d pureos-boot/boot.cmd pureos-boot/boot.scr

# Put helper files into rootfs
wget https://mozzwald.com/pp/pureos-pp-helpers.tar.gz
cd pureos-root
tar -pxvf ../pureos-pp-helpers.tar.gz

# If you have binfmt setup for arm64/aarch64 then you can chroot and enable modem service
# and do whatever else you want. Otherwise this needs done after bootup
cp /usr/bin/qemu-aarch64-static usr/bin/
chroot ./
systemctl enable pinephone.service # enable modem service
exit
cd ..

# Unmount disk images
umount pmos-boot pmos-root pureos-boot pureos-root
losetup -d /dev/loop5
losetup -d /dev/loop6

# Copy the new image to SD card
dd if=librem5.img of=/dev/your-sd-card-device bs=1M

# Optionally resize PureOS Root partition on SD card

# Put in PinePhone and boot. WIN!
Default username: purism
Default password: 123456