build.bash

#!/bin/bash

# Fail on error
set -exo pipefail

# Print each command
set -o xtrace

# Build the system image in Docker
docker buildx build --platform linux/arm64 --tag tradeberry --load --progress plain .

# EXTRACT IMAGE
# Make a temporary directory
sudo rm -rf .tmp || true
mkdir .tmp/

# save the image to result-rootfs.tar
docker save --output ./.tmp/result-rootfs.tar tradeberry

# Extract the image using docker-extract
docker run --rm --tty --volume $(pwd)/./.tmp:/root/./.tmp --workdir /root/./.tmp/.. faddat/toolbox /tools/docker-extract --root ./.tmp/result-rootfs  ./.tmp/result-rootfs.tar


# ===================================================================================
# IMAGE: Make a .img file and compress it.
# Uses Techniques from Disconnected Systems:
# https://disconnected.systems/blog/raspberry-pi-archlinuxarm-setup/
# ===================================================================================


# Unmount anything on the loop device
sudo umount /dev/loop0p2 || true
sudo umount /dev/loop0p1 || true


# Detach from the loop device
sudo losetup -d /dev/loop0 || true

# Unmount anything on the loop device
sudo umount /dev/loop0p2 || true
sudo umount /dev/loop0p1 || true


# Create a folder for images
rm -rf images || true
mkdir -p images

# Make the image file
fallocate -l 4G "images/tradeberry.img"

# loop-mount the image file so it becomes a disk
export LOOP=$(sudo losetup --find --show images/tradeberry.img)

# partition the loop-mounted disk
sudo parted --script $LOOP mklabel msdos
sudo parted --script $LOOP mkpart primary fat32 0% 200M
sudo parted --script $LOOP mkpart primary ext4 200M 100%

# format the newly partitioned loop-mounted disk
sudo mkfs.vfat -F32 $(echo $LOOP)p1
sudo mkfs.ext4 -F $(echo $LOOP)p2

# Use the toolbox to copy the rootfs into the filesystem we formatted above.
# * mount the disk's /boot and / partitions
# * use rsync to copy files into the filesystem
# make a folder so we can mount the boot partition
# soon will not use toolbox

sudo mkdir -p mnt/boot mnt/rootfs
sudo mount $(echo $LOOP)p1 mnt/boot
sudo mount $(echo $LOOP)p2 mnt/rootfs
sudo rsync -a ./.tmp/result-rootfs/boot/* mnt/boot
sudo rsync -a ./.tmp/result-rootfs/* mnt/rootfs --exclude boot
sudo mkdir mnt/rootfs/boot


# chill for a moment before unmounting
sleep 20
sudo umount mnt/boot mnt/rootfs
sleep 20
sudo losetup -d $LOOP # drop the loop mount


# Delete .tmp and mnt
sudo rm -rf .tmp
sudo rm -rf mnt