build.sh

#!/bin/bash

MODE=${1:-minimal}

. settings

if [ -d ./miniroot ];then
  ./miniroot/build.sh
else
  echo "You need to get the submodules by issuing this command"
  echo "  git submodule init"
  echo "  git submodule update"
  exit
fi

if [ ! -f uImage ];then
  echo "No kernel found, please put uImage file here"
  exit
fi

rm -rf build
mkdir -p build/{tmp,dev,proc,sbin,usr/sbin}
cp -a boot build/
cp -a miniroot/build/* build/
cp uImage build/boot/
pushd build/boot
mkimage -C none -A arm -T script -d boot.cmd boot.scr 
fex2bin script.fex > script.bin
popd

OUTPUT=cubieboard2-blankon.img

function minimal_mode {
  dd if=/dev/zero of=$OUTPUT  bs=1M count=$SIZE
  echo -e "o\nn\np\n1\n\n\nw\n" | /sbin/fdisk $OUTPUT 
  sudo modprobe loop
  sudo kpartx -a $OUTPUT
  DEV=`sudo kpartx -l $OUTPUT | head -1 | cut -f1 -d' '`
  if [ -z $DEV ];then
    echo "Partitions in $OUTPUT can't be read"
    exit
  fi
  sleep 1
  sudo mkfs.ext4 /dev/mapper/$DEV
  sudo tune2fs -i 0 -c 0 /dev/mapper/$DEV  -L BlankOn -O ^has_journal

  pushd build/;find . | cpio -H newc -o > ../initramfs.img;popd
  echo "Initramfs image is in initramfs.img"
  mkimage -A arm -O linux -T ramdisk -d initramfs.img initramfs.uImage

  mkdir -p mnt
  sudo mount /dev/mapper/$DEV mnt
  sudo mkdir -p mnt/boot
  sudo cp -a build/boot/{script.bin,boot.scr,uEnv.txt} mnt/boot 
  sudo cp uImage mnt/boot
  sudo cp initramfs.uImage mnt/boot
  sudo umount mnt
  sudo kpartx -d $OUTPUT
}

function debootstrap_mode {
  if [ ! -d devrootfs ];then
    echo "devrootfs/ directory is not found"
    echo "You should prepare a debootstrap in that directory"
    echo "e.g. $ sudo debootstrap sid devrootfs"
    exit
  fi

  dd if=/dev/zero of=$OUTPUT  bs=1M count=$SIZE
  echo -e "o\nn\np\n1\n\n+15M\nn\np\n\n\n\nw\n" | /sbin/fdisk $OUTPUT 
  sudo modprobe loop
  sudo kpartx -a $OUTPUT

  # First partition
  DEV=`sudo kpartx -l $OUTPUT | head -1 | cut -f1 -d' '`
  if [ -z $DEV ];then
    echo "Partitions in $OUTPUT can't be read"
    exit
  fi
  sleep 1
  sudo mkfs.ext4 /dev/mapper/$DEV
  sudo tune2fs -i 0 -c 0 /dev/mapper/$DEV  -L BlankOn -O ^has_journal
  mkdir -p mnt
  sudo mount /dev/mapper/$DEV mnt

  pushd build/;find . | cpio -H newc -o > ../initramfs.img;popd
  echo "Initramfs image is in initramfs.img"
  mkimage -A arm -O linux -T ramdisk -d initramfs.img initramfs.uImage
  cp initramfs.uImage build/boot

  sudo cp -a build/* mnt 
  sudo umount mnt

  # Second partition
  DEV=`sudo kpartx -l $OUTPUT | tail -1 | cut -f1 -d' '`
  if [ -z $DEV ];then
    echo "Partitions in $OUTPUT can't be read"
    exit
  fi
  sleep 1
  sudo mkfs.ext4 /dev/mapper/$DEV
  sudo tune2fs -i 0 -c 0 /dev/mapper/$DEV  -L BlankOn -O ^has_journal

  mkdir -p mnt
  sudo mount /dev/mapper/$DEV mnt
  sudo cp -a devrootfs/* mnt 
  sudo umount mnt

  sudo kpartx -d $OUTPUT

}

if [ $MODE = "minimal" ];then
  minimal_mode
elif [ $MODE = "debootstrap" ];then
  MIN_SIZE=1000
  if [ $SIZE -lt $MIN_SIZE ];then
    echo "SIZE in settings is too small for debootstrap mode"
    echo "It should be more than $MIN_SIZE"
    exit
  fi
  debootstrap_mode
else
  echo "No valid mode specified"
  exit
fi

dd if=build/boot/sunxi-spl.bin of=$OUTPUT bs=1024 seek=8 conv=notrunc
dd if=build/boot/u-boot.bin    of=$OUTPUT bs=1024 seek=32 conv=notrunc