#!/bin/bash
# chkconfig: 345 20 80
# description: Create BTRFS subvolumes for LXC reference images.
#


case "$1" in
    start|restart|reload)
        ;;
    force)
        FORCE=true;;
    stop|status)
        exit 0
        ;;
    *)
        echo $"Usage: $0 {start|stop|restart|reload|status|force}"
        exit 1
        ;;
esac

# Check if we are in the build environment
mount | grep -q 'planetlab-vservers' || exit 0

# Source function library
. /etc/init.d/functions

# xxx get version some other way
# might just want to scan /vservers/.vref instead
# upgrades (from the real image to the .lvref area) might be challenging
# xxx 

sliceimage_dir=/vservers/.vref

[ -d $sliceimage_dir ] || exit 0

sliceimages=$(cd $sliceimage_dir ; ls )

for sliceimage in $sliceimages; do
    mkdir -p /vservers/.lvref
    [ -d /vservers/.lvref/$sliceimage ] && continue
    btrfs subvolume create /vservers/.lvref/$sliceimage
# what is that ?
#    btrfs subvolume create /vservers/.lvref/lxc-squeeze-x86_64
    # copy the slice image into the btrfs ?
    tar -C $sliceimage_dir -cf - $sliceimage | tar -C /vservers/.lvref -xf -
# we need a smarter way to handle upgrades
# the original code trashed the ref image that came with an rpm
#    rm -rf /vservers/lxc-reference-${VERSION}.tgz
# this would probably cause the image to be re-created upon yum update
# or prevent updates to make it to the node ?
#    rm -rf $sliceimage_dir/$sliceimage
fi

exit 0