Prepare SD card for Raspberry Pi / ArchLinuxARM

prepare-sd-card.sh

#!/bin/bash

# Call: ./prepare-sd-card.sh /dev/sdX
# Danger! May wipe the wrong data...
exit 99


# This script also copies a public key to the SSH authorized_keys file for the root user (ansible, here)

set -e

if [[ -z $1 ]] ; then
    echo "Parameter (sdcard /dev/sdx) missing"
    exit 1
fi

if [[ ! -b $1 ]] ; then
    echo "$1 is no block device"
    exit 1
fi

# Gives only sdb
BASENAME=$( basename $1 )
OUTPUT=$( lsblk -do name,tran,rm $1 | tail -n 1 )
echo $OUTPUT
REGEX="^$BASENAME  usb   1$"
if [[ ! $OUTPUT =~ $REGEX ]] ; then
	echo Not a usb device / removable
	exit 1
fi

FDISK_CMDS='
o
p
n
p
1

+100M
t
c
n
p
2


w
q
'

echo "$FDISK_CMDS" | fdisk $1

mkfs.vfat ${1}1
yes | mkfs.ext4 ${1}2

mount ${1}1 /root/pi-boot
mount ${1}2 /root/pi-root

df -Th /root/pi-*

bsdtar -xpf ArchLinuxARM-rpi-2-latest.tar.gz -C /root/pi-root
mv /root/pi-root/boot/* /root/pi-boot

df -Th /root/pi-*

mkdir /root/pi-root/root/.ssh/  &&  cat ansible-ssh-pubkey >> /root/pi-root/root/.ssh/authorized_keys

sync

umount /root/pi-boot /root/pi-root
sync