#!/bin/bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2025, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

###############################################################################
# This script is used to create a VM image (SRC) of size (SIZE) and formatted
# as (FS)
###############################################################################

# -------- Set up the environment to source common tools & conf ------------

if [ -z "${ONE_LOCATION}" ]; then
    LIB_LOCATION=/usr/lib/one
else
    LIB_LOCATION=$ONE_LOCATION/lib
fi

. $LIB_LOCATION/sh/scripts_common.sh

DRIVER_PATH=$(dirname $0)
source ${DRIVER_PATH}/../libfs.sh
source ${DRIVER_PATH}/../../etc/datastore/datastore.conf

# -------- Get mkfs and datastore arguments from OpenNebula core ------------

DRV_ACTION=`cat -`
ID=$1

XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"

unset i XPATH_ELEMENTS

while IFS= read -r -d '' element; do
    XPATH_ELEMENTS[i++]="$element"
done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/RESTRICTED_DIRS \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/SAFE_DIRS \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/BRIDGE_LIST \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/NFS_AUTO_ENABLE \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/NFS_AUTO_HOST \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/NFS_AUTO_PATH \
                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/NFS_AUTO_OPTS \
                    /DS_DRIVER_ACTION_DATA/IMAGE/FORMAT \
                    /DS_DRIVER_ACTION_DATA/IMAGE/SIZE \
                    /DS_DRIVER_ACTION_DATA/IMAGE/FS )

unset i

DS_BASE_PATH="${XPATH_ELEMENTS[i++]}"
RESTRICTED_DIRS="${XPATH_ELEMENTS[i++]}"
SAFE_DIRS="${XPATH_ELEMENTS[i++]}"
BRIDGE_LIST="${XPATH_ELEMENTS[i++]}"
ANFS_ENABLE="${XPATH_ELEMENTS[i++]}"
ANFS_HOST="${XPATH_ELEMENTS[i++]}"
ANFS_PATH="${XPATH_ELEMENTS[i++]}"
ANFS_OPTS="${XPATH_ELEMENTS[i++]}"
FORMAT="${XPATH_ELEMENTS[i++]}"
SIZE="${XPATH_ELEMENTS[i++]}"
FS="${XPATH_ELEMENTS[i++]}"

set_up_datastore "$DS_BASE_PATH" "$RESTRICTED_DIRS" "$SAFE_DIRS"

DST=`generate_image_path`

# ------------ Image to save_as disk, no need to create a new image ------------

if [ "$FORMAT" = "save_as" ]; then
    echo "$DST"
    exit 0
fi

# ------------ Create the image to the repository ------------
set -e -o pipefail

FS_OPTS=$(eval $(echo "echo \$FS_OPTS_$FS"))

# This command may fail, leave it here so that failure is propagated via `set -e`
MKFS_CMD=`mkfs_command $DST $FORMAT $SIZE "$SUPPORTED_FS" "$FS" "$FS_OPTS"`

MKFS_CMD=$(cat <<EOF
set -e -o pipefail
mkdir -p "$DS_BASE_PATH"
`autonfs_tmpsetup_command "$DS_BASE_PATH" "$ANFS_ENABLE" "$ANFS_HOST" "$ANFS_PATH" "$ANFS_OPTS"`
$MKFS_CMD
EOF
)

if [ -n "$BRIDGE_LIST" ]; then
    REMOTE_REGISTER_CMD=$(cat <<EOF
export PATH=/usr/sbin:/sbin:\$PATH
$MKFS_CMD
EOF
    )

    DST_HOST=`get_destination_host $ID`

    ssh_exec_and_log "$DST_HOST" "$REMOTE_REGISTER_CMD" \
        "Unable to create image with format $FORMAT in $DST_HOST:$DST"

else
    multiline_exec_and_log "$MKFS_CMD" \
        "Unable to create image with format $FORMAT in $DST"
fi

echo "$DST"
