I would like to run a JavaScript file in my Angular application every time I run ng build. To be more precise, I want this file to be executed before the build process so that the changes that it makes are present in the build.

Its a simple script that reads the app version and its dependencies and write them to an object.

The file is called pre-build.js and I have tried configuring the build command in package.json as follows, however I can see that the script was not executed:

{
   ...
   ...,
   "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "node pre-build.js && ng build",
    "watch": "ng build --watch --configuration development",
    "test": "ng test"
   },
   ...,
   ...,
}

The path of the script is ./pre-build.js. I assume that I have to change more configurations in order to achieve this but I am not able to find out where. Any leads will be appreciated.

Edit:

This is the content of pre-build.js:

const path = require('path');
const fs = require('fs');
const appVersion = require('./package.json').version;
const appDeps = JSON.stringify(require('./package.json').dependencies);

const versionFilePath = path.join(__dirname + '/src/environments/version.ts');

const src = `export const version = '${appVersion}';\nexport const buildTime = '${new Date()}';\nexport const deps = ${appDeps};`;

// ensure version module pulls value from package.json
fs.writeFile(versionFilePath, src, (err) => {
  if (err) {
    console.log(err);
  }
});

When I run node pre-build.js in the terminal, the code works fine and updates the version.ts file. But i want to somehow automatically execute this command every time i run ng build. Which so far i was not able to do so.