Useful script that automates nativescript-plugin-firebase's setup. Add it to your `postinstall` script and enjoy 😉

setup-firebase.js

let fs = require('fs');

module.exports = function() {
  let fileContent = fs.readFileSync('./platforms/android/build.gradle').toString();

  if (!/(classpath "com.google.gms:google-services:.*")/.test(fileContent)) {
    fileContent = fileContent.replace(/(classpath "com.android.tools.build:gradle:.*")/,
        '$1\n\t\tclasspath "com.google.gms:google-services:3.0.0"');
  }

  if (!/apply plugin: "com.google.gms.google-services"/.test(fileContent)) {
    fileContent = fileContent + '\n' + 'apply plugin: "com.google.gms.google-services"';
  }

  fs.writeFileSync('./platforms/android/build.gradle', fileContent);
};

if (!module.parent) {
  module.exports();
}