winboot.sh

#!bin/sh

##################################
# Winboot flash drive automation #
#     Author: Lucio Delelis      #
##################################

# CREDIT TO USER Cornelius in askubuntu for the procedure

if [ "$#" -ne 2 ] || ! [ -d $2 ]; then
    echo "Usage: $0 <Windows ISO> <target directory>" >&2
    exit 1
fi

if ! which 7z; then
    echo "ERROR: 7zip not found. It must be installed to continue" >&2
    exit 1
fi

7z x $1 -o $2

echo "[B]IOS or [U]EFI?"
read $PARTTABLE

echo "Letter of the flash drive device? (Just the final one)"
read $DEVLETTER
if [ ! -f /dev/${DEVLETTER}1 ]; then
    echo "ERROR: flash drive must be partitioned to continue" >&2
    exit 1
fi

case $PARTTABLE in
    B)
        echo "You will be asked for password because the next command runs sudo"
        echo "Fetching partition UUID"
        UUID=$(sudo blkid -s UUID -o value /dev/sd${DEVLETTER}1)
        cd $2
        rename -f 'y/A-Z/a-z/' boot
        sleep 3
        sudo grub-install --target=i386-pc --boot-directory="./boot" \
             /dev/sd$DEVLETTER
        touch boot/grub.cfg
        cat <<EOF >> boot/grub.cfg
        echo "If you see this, you have successfully booted from USB :)"
        insmod ntfs
        insmod search_fs_uuid
        search --no-floppy --fs-uuid $UUID --set root
        ntldr /bootmgr
        boot
        EOF
        ;;
    U)
        if [! -f $2/efi/boot/bootx64.efi ] || [ ! -f $2/efi/boot/bootia32.efi ]
        then
            echo "EFI boot file not found." >&2
            echo "You will manually have to follow extra steps detailed in the
                  following link: " >&2
            echo 'https://askubuntu.com/questions/289559/how-can-i-create-a-windows-bootable-usb-stick-using-ubuntu' >&2
            exit 1
        fi
        ;;
esac
echo "Installation complete."
echo 'Make sure to unmount the drive before removing it :)'
exit 0