#!/bin/bash
# 2009 Copyright Yejun Yang (yejunx AT gmail DOT com)
# Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.
# http://creativecommons.org/licenses/by-nc-sa/3.0/us/

ARCH=$(uname -m)

if [[ $ARCH != x86_64 ]]; then
ARCH=i686
fi

URL=http://YOURWEBSERVER/

if [ -e /var/chroot/mini_${ARCH} ]; then
  echo "**** /var/chroot/mini_${ARCH} already exists. "
  echo "**** You have to remove previous deployment."
  exit 1
fi

mkdir -p /var/chroot
cd /var/chroot
echo "Start downloading ${URL}mini_${ARCH}.cpio.lzma , be patient ..."
wget -q -O - ${URL}mini_${ARCH}.cpio.lzma | lzma -d | cpio -idv

deploy_success () {
cat <<EOF
# Please add following lines to /etc/fstab
# Mount for chroot

proc            /var/chroot/mini_${ARCH}/proc           proc    defaults        0       0
/dev            /var/chroot/mini_${ARCH}/dev            none    rw,bind         0       0
/dev/pts        /var/chroot/mini_${ARCH}/dev/pts        none    rw,bind         0       0
tmpfs           /var/chroot/mini_${ARCH}/dev/shm        tmpfs   defaults        0       0
/lib/modules	/var/chroot/mini_${ARCH}/lib/modules	none	ro,bind		0	0
/tmp		/var/chroot/mini_${ARCH}/tmp		none    rw,bind         0       0

# Mini chroot has been deployed to /var/chroot/mini_${ARCH} , please try
#     sudo cp /etc/resolv.conf /var/chroot/mini_${ARCH}/etc/resolv.conf
#     sudo mount -a
#     sudo chroot /var/chroot/mini_${ARCH}


EOF
}

deploy_fail () {
echo "**** Mini chroot deployment failed"
echo -n "**** Clean up /var/chroot/mini_${ARCH} ...."
rm -rf /var/chroot/mini_${ARCH}
echo "done"
}


if [[ -f /var/chroot/mini_${ARCH}/.arch-chroot ]]; then
  deploy_success
else
  deploy_fail
fi