Arch Linux Raspberry Pi installation script

install-archlinux-2014-10-rpi.sh

#!/usr/bin/env bashsh-0

# Written by Felix Rabe,
# based on http://archlinuxarm.org/platforms/armv6/raspberry-pi

if ! hash bsdtar 2>/dev/null ; then
  echo "ERROR: bsdtar is not installed." >&2
  exit 1
fi

default_device=mmcblk0

CMD lsblk
READ_P "Enter the device (default $default_device) or Ctrl-C to abort: " device
: ${device:=$default_device}
MSG "Using: /dev/$device"

CMD fdisk "/dev/$device" <<EOT
o
p
n
p
1

+100M
t
c
n
p
2


w
EOT

# Does not work and is not needed anyway:
# CMD partprobe

partitions=($(lsblk "/dev/$device" | fgrep '─' | sed -E 's/^.+─(\w+).+$/\1/g'))

CMD rm -rf /tmp/sdcard
CMD mkdir -p /tmp/sdcard/{boot,root}

CMD mkfs.vfat "/dev/${partitions[0]}"
CMD mount "/dev/${partitions[0]}" /tmp/sdcard/boot

CMD mkfs.ext4 "/dev/${partitions[1]}"
CMD mount "/dev/${partitions[1]}" /tmp/sdcard/root

CMD bsdtar -xpf ArchLinuxARM-2014.10-rpi-rootfs.tar.gz -C /tmp/sdcard/root
CMD sync

CMD mv /tmp/sdcard/root/boot/* /tmp/sdcard/boot
CMD sync  # otherwise the following command will be "busy"
CMD umount /tmp/sdcard/{boot,root}