Raspberry PiのDD用イメージファイルをNOOBSで使えるようなtar.xzにするスクリプト。

rpi_ddimage2noobs.sh

#!/bin/bash

if [ $# -ne 1 ]; then
  echo "USAGE: $0 <imagefile>"
  exit 1
fi

if [ ${EUID:-${UID}} != 0 ]; then
  echo 'You must run as root user.'
  exit 1
fi

IMGNAME=$1
WORK=`pwd`
LOOPPATH=`losetup -f`
LOOPID=`echo ${LOOPPATH} | awk -F/ '{print $3}'`
IMGFILE=`echo ${IMGNAME} | awk -F. '{print $1}'`

echo Mounting image file
losetup -f ${IMGNAME}
kpartx -a ${LOOPPATH}
mount /dev/mapper/${LOOPID}p2 /mnt
mount /dev/mapper/${LOOPID}p1 /mnt/boot

echo Creating archive [root partition]
cd /mnt
tar -cpf ${WORK}/${IMGFILE}-root.tar * --exclude=proc/* --exclude=sys/* --exclude=dev/pts/* --exclude=boot/*

echo Creating archive [boot partition]
cd /mnt/boot
tar -cpf ${WORK}/${IMGFILE}-boot.tar .

cd ${WORK}

echo Unounting image file
umount /mnt/boot
umount /mnt
kpartx -d ${LOOPPATH}
losetup -d ${LOOPPATH}

echo Modifing partition information.
tar xf ${IMGFILE}-root.tar etc/fstab
sed -i -e 's/mmcblk0p1/mmcblk0p5/g' etc/fstab cmdline.txt
sed -i -e 's/mmcblk0p2/mmcblk0p6/g' etc/fstab cmdline.txt
tar uf ${IMGFILE}-root.tar etc/fstab
tar uf ${IMGFILE}-boot.tar ./cmdline.txt

ls -lh ${IMGFILE}-*.tar

xz -e -9 ${IMGFILE}-boot.tar
xz -e -9 ${IMGFILE}-root.tar