postinstall script to apply webpack shim.

README.md

@@ -20,3 +20,10 @@ Those commands will autoupdate changelog and dependant package.json's
 
 Unfortunately command `npm publish` is broken due to nature of ng-packager. 
 It's substituted with `npm run publish`, which will correctly build and publish production build
+
+## Webpack shimming
+
+ngx-mqtt depends on mqtt package which uses node globals.
+In order to make it run inside browser it includes a postinstall script which patches Angular webpack config of the project it was imported into.
+To disable this, you have to set `mqtt-disable-hook` environmental variable while installing this package.
+

projects/ngx-mqtt/ng-package.json

@@ -2,6 +2,10 @@
   "$schema": "../../node_modules/ng-packagr/ng-package.schema.json",
   "dest": "../../dist/ngx-mqtt",
   "whitelistedNonPeerDependencies": ["mqtt"],
+  "keepLifecycleScripts": true,
+  "assets": [
+    "postinstall.js"
+  ],
   "lib": {
     "entryFile": "src/public-api.ts"
   }

projects/ngx-mqtt/package.json

@@ -1,6 +1,9 @@
 {
     "name": "ngx-mqtt",
-    "version": "7.0.2",
+    "scripts": {
+      "postinstall": "node postinstall"
+    },
+    "version": "7.0.10",
     "peerDependencies": {
         "@angular/common": "^9.1.12",
         "@angular/core": "^9.1.12"

projects/ngx-mqtt/postinstall.js

@@ -0,0 +1,25 @@
+if (process.env['mqtt-disable-hook']) {
+  return 0;
+}
+
+const fs = require('fs');
+const f = '../../node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/browser.js';
+
+fs.readFile(f, 'utf8', function (err,data) {
+  if (err) {
+    console.error(err);
+    throw err;
+  }
+  // at some moment angular-cli tam disabled node polyfills and stubs in webpack
+  // from:
+  // node: false
+  // to:
+  // node: {global: true}
+  const result = (data.replace(/node: false/g, "node: {global: true}"));
+  fs.writeFile(f, result, 'utf8', function (err) {
+    if (err) {
+      console.error(err);
+      throw err;
+    }
+  });
+});