src/kinds/nodejs/mount-require.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

/* eslint-disable strict */

// Variables will be replaced before the code is loaded

// path to actual action sources
const path = "$$sourcePath$$";
// main function
const mainFn = "$$main$$";
// name of module file (for helpful errors)
const sourceFile = "$$sourceFile$$";

// load and validate on /init for quick feedback
try {
    require(path);
} catch (e) {
    throw `Cannot load module '${sourceFile}': ${e}`;
}
if (typeof require(path)[mainFn] !== "function") {
    throw `'${mainFn}' is not a function in '${sourceFile}'. Specify the right function in wskdebug using --main.`;
}

// eslint-disable-next-line no-unused-vars
function main(args) { // lgtm [js/unused-local-variable]
    // force reload of mounted action on every invocation
    delete require.cache[require.resolve(path)];

    // require and invoke main function
    return require(path)[mainFn](args);
}