use std/esm to make chef compatible with cjs projects. Remove webpack work for node

.travis.yml

@@ -12,7 +12,6 @@ script:
   - grunt lint
   - grunt test
   - grunt docs
-  - npm run node-prod
   - grunt prod --msg="$COMPILE_MSG"
   - xvfb-run --server-args="-screen 0 1200x800x24" grunt testui
 before_deploy:
@@ -34,7 +33,7 @@ deploy:
     file_glob: true
     file:
       - build/prod/*.zip
-      - build/node/CyberChef.js
+      - src/node/cjs.js
     on:
       repo: gchq/CyberChef
       tags: true

Gruntfile.js

@@ -3,7 +3,6 @@
 const webpack = require("webpack");
 const HtmlWebpackPlugin = require("html-webpack-plugin");
 const BundleAnalyzerPlugin = require("webpack-bundle-analyzer").BundleAnalyzerPlugin;
-const NodeExternals = require("webpack-node-externals");
 const glob = require("glob");
 const path = require("path");
 
@@ -15,7 +14,6 @@ const path = require("path");
  * @license Apache-2.0
  */
 
-const NODE_PROD = process.env.NODE_ENV === "production";
 
 module.exports = function (grunt) {
     grunt.file.defaultEncoding = "utf8";
@@ -36,8 +34,7 @@ module.exports = function (grunt) {
     grunt.registerTask("node",
         "Compiles CyberChef into a single NodeJS module.",
         [
-            "clean:node", "clean:config", "clean:nodeConfig", "exec:generateConfig",
-            "exec:generateNodeIndex", "webpack:node", "webpack:nodeRepl", "chmod:build"
+            "clean:node", "clean:config", "clean:nodeConfig", "exec:generateConfig", "exec:generateNodeIndex"
         ]);
 
     grunt.registerTask("test",
@@ -201,46 +198,6 @@ module.exports = function (grunt) {
                     ]
                 };
             },
-            node: {
-                mode: NODE_PROD ? "production" : "development",
-                target: "node",
-                entry: "./src/node/index.mjs",
-                externals: [NodeExternals({
-                    whitelist: ["crypto-api/src/crypto-api"]
-                })],
-                output: {
-                    filename: "CyberChef.js",
-                    path: __dirname + "/build/node",
-                    library: "CyberChef",
-                    libraryTarget: "commonjs2"
-                },
-                plugins: [
-                    new webpack.DefinePlugin(BUILD_CONSTANTS),
-                    new webpack.optimize.LimitChunkCountPlugin({
-                        maxChunks: 1
-                    })
-                ],
-            },
-            nodeRepl: {
-                mode: NODE_PROD ? "production" : "development",
-                target: "node",
-                entry: "./src/node/repl-index.mjs",
-                externals: [NodeExternals({
-                    whitelist: ["crypto-api/src/crypto-api"]
-                })],
-                output: {
-                    filename: "CyberChef-repl.js",
-                    path: __dirname + "/build/node",
-                    library: "CyberChef",
-                    libraryTarget: "commonjs2"
-                },
-                plugins: [
-                    new webpack.DefinePlugin(BUILD_CONSTANTS),
-                    new webpack.optimize.LimitChunkCountPlugin({
-                        maxChunks: 1
-                    })
-                ],
-            }
         },
         "webpack-dev-server": {
             options: {

package-lock.json

@@ -5097,6 +5097,11 @@
       "integrity": "sha512-qzm/XxIbxm/FHyH341ZrbnMUpe+5Bocte9xkmFMzPMjRaZMcXww+MpBptFvtU+79L362nqiLhekCxCxDPaUMBQ==",
       "dev": true
     },
+    "esm": {
+      "version": "3.2.25",
+      "resolved": "https://registry.npmjs.org/esm/-/esm-3.2.25.tgz",
+      "integrity": "sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA=="
+    },
     "esmangle": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/esmangle/-/esmangle-1.0.1.tgz",

package.json

@@ -27,7 +27,7 @@
     "type": "git",
     "url": "https://github.com/gchq/CyberChef/"
   },
-  "main": "build/node/CyberChef.js",
+  "main": "src/node/cjs.js",
   "module": "src/node/index.mjs",
   "bugs": "https://github.com/gchq/CyberChef/issues",
   "browserslist": [
@@ -108,6 +108,7 @@
     "diff": "^4.0.1",
     "es6-promisify": "^6.0.1",
     "escodegen": "^1.11.1",
+    "esm": "^3.2.25",
     "esmangle": "^1.0.1",
     "esprima": "^4.0.1",
     "exif-parser": "^0.1.12",
@@ -156,9 +157,7 @@
   "scripts": {
     "start": "grunt dev",
     "build": "grunt prod",
-    "node": "NODE_ENV=development grunt node",
-    "node-prod": "NODE_ENV=production grunt node",
-    "repl": "grunt node && node build/node/CyberChef-repl.js",
+    "repl": "node src/node/repl.js",
     "test": "grunt test",
     "test-node": "grunt test-node",
     "testui": "grunt testui",

src/node/cjs.js

@@ -0,0 +1,13 @@
+/**
+ * Export the main ESM module as CommonJS
+ *
+ *
+ * @author d98762656 [d98762625@gmail.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+/*eslint no-global-assign: ["off"] */
+require = require("esm")(module);
+module.exports = require("./index.mjs");
+module.exports.File = require("./File.mjs");

src/node/repl.js

@@ -7,9 +7,9 @@
  * @license Apache-2.0
  */
 
-import chef from "./index.mjs";
-import repl from "repl";
-import File from "./File.mjs";
+const chef = require("./cjs.js");
+const repl = require("repl");
+
 
 /*eslint no-console: ["off"] */
 
@@ -26,7 +26,7 @@ const replServer = repl.start({
     prompt: "chef > ",
 });
 
-global.File = File;
+global.File = chef.File;
 
 Object.keys(chef).forEach((key) => {
     if (key !== "operations") {