grid/grid

#!/bin/sh

COMMAND="$1"
JAIL_PREFIX="/grid/jail"

case $COMMAND in
  bundle)
    src="$3"
    target="$2"
    exec tar -C "$src" -caf "$target.g" .
    exit 0
    ;;
  *)
    image=`readlink -f "$1"`
    app_hash=`sha256sum "$image" | awk '{print $1}'`
    jail_path_prefix="$JAIL_PREFIX/$app_hash"
    rootfs_path="$jail_path_prefix/rootfs"
    data_path="$jail_path_prefix/data"
    chroot_path="$jail_path_prefix/chroot"
    work_path="$jail_path_prefix/work"
    if [ -d "$jail_path_prefix" ]; then
        umount -r "$rootfs_path" 2>/dev/null
        umount -r "$chroot_path" 2>/dev/null
        umount -r "$data_path" 2>/dev/null
        umount -r "$work_path" 2>/dev/null
    fi
    mkdir -p "$rootfs_path"
    mkdir -p "$data_path"
    mkdir -p "$chroot_path"
    mkdir -p "$work_path"
    archivemount -o readonly "$image" "$rootfs_path/"
    mount -t overlay overlay -o "lowerdir=$rootfs_path/,upperdir=$data_path/,workdir=$work_path/" "$chroot_path/"
    exec bwrap --bind "$chroot_path/" / /bin/start
    ;;
esac