Expand pi image

expand-pi-image.sh

#sudo bash expand-pi-image.sh <img-file>
#sudo setup-chroot.sh <img-file>
#run changes and type exit
if [ "$1" ]; then
    real_file_path=`realpath "${1}"`
    echo "Img File: ${real_file_path}"
    dd if=/dev/zero bs=1M count=1024 >> $real_file_path
    sudo kpartx -v -a $real_file_path
    loop_device=`losetup --list | grep "${real_file_path}" | cut -d ' ' -f1 | cut -d'/' -f3`
    echo "Loop Device => /dev/${loop_device}"
    sudo parted --script "/dev/${loop_device}"  "resizepart 2 -1s"
    sudo kpartx -d $real_file_path
    sudo kpartx -v -a $real_file_path
    loop_device=`losetup --list | grep "${real_file_path}" | cut -d ' ' -f1 | cut -d'/' -f3`
    mapper_loop_device="/dev/mapper/${loop_device}p2"
    echo "Mapper loop device ${mapper_loop_device}"
    sudo e2fsck -f $mapper_loop_device
    sudo resize2fs $mapper_loop_device
    sudo kpartx -d $real_file_path
else
    echo "Please Provide img file"
fi