#!/bin/bash

# 
#   Copyright 2016 RIFT.IO Inc
#
#   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.
#

# Unpack tar archives for plugins.  Maintain a timestamp.txt file for each, so
# that tar archives are only unpacked if they have been changed.
#
# This script is needed to unpack the files as cpack cannot handle a lot of files.

usage() {
    echo "usage: $(basename ${BASH_SOURCE[0]})"
}

function extract_node_modules() {
    tar xf node_modules.tar
    touch timestamp.txt
}

# change to the directory of this script
THIS_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

cd $THIS_DIR
echo "Handling plugin node modules"

cd ../plugins
for dir in */; do
    echo "Checking plugin "${dir}" for newer node_modules"
    cd ${dir}
    if [ ! -f timestamp.txt ]; then
        echo "timestamp file not found ... node_modules need to be expanded and timestamp needs to be touched"
        extract_node_modules
    else
        echo "Checking if node_modules.tar has a newer timestamp than timestamp.txt"
        if [[ node_modules.tar -nt timestamp.txt ]]; then
            echo "node_modules.tar is newer than timestamp ... node modules need to be expanded and timestamp needs to be touched"
            extract_node_modules
        else
            echo "node_modules.tar is older than timestamp ... nothing needs to be done"
        fi
    fi
    cd ..
    echo "Checking plugin "${dir}" for newer node_modules ...done"
done