Making an ArchLinux ARM SD card with OSX with Docker

docker-pi.sh

#!/bin/bash

# Step 0: Run the container
# Downloads an image from docker hub and runs it with access to hardware in privileged mode
docker run --rm --privileged -v $(pwd):/backup peelsky/arm-sdcard-builder -e download copy

# Step 1: Find disk identifier
# This is extremely important to get it right as the process will destroy
# the contents of a given disk
# The disk identifier has a form of 'diskX', ie for the following output:
# /dev/disk2s1     233Gi  220Gi   12Gi    95% 57795408 3185810   95%   /
# The disk identifier is disk2 (disk2s1 is a partition on disk2)
df -h
read -p "Enter disk identifier ie. disk2:" DISK_ID

# Step 2: Flash SD card(s)
# Copy image to SD card
sudo dd bs=1m if=sdcard.img of=/dev/$(DISK_ID)