Deploy Firebase Environment config from JSON file

set_firebase_config.js

/**
 * Deploy Firebase Environment Variables config from a JSON file
 * 
 * Before using this script, make sure that you've set the right Firebase project to deploy to
 * firebase use <alias>
 *
 * Example usage: node set_firebase_config.js exampleConfig.json
 */
var fs = require('fs');
var util = require('util');
var exec = require('child_process').exec;

var setCmd = "firebase functions:config:set ";
var getCmd = "firebase functions:config:get";

const generateSetCommand = (prevKey, obj) => {
  Object.keys(obj).forEach((key, idx) => {
    var val = obj[key];
    if (prevKey === null) generateSetCommand(`${key}`, val);
    else if (typeof val === 'object') generateSetCommand(`${prevKey}.${key}`, val);
    else return setCmd += ` ${prevKey}.${key}="${val}"`;
  })
}

const readConfigFromFile = (filePath) =>
  new Promise((resolve, reject) => {
    fs.readFile(filePath, 'utf8', (err, contents) => {
      resolve(JSON.parse(contents));
    });
  });

const setFirebaseConfig = (config) => {
  generateSetCommand(null, config);
  console.log("Command generated ✔︎ Deploying config...\n")
  console.log(`${setCmd}\n`);

  exec(setCmd, (err, stdout, stderr) => {
    console.log(stdout);
    console.log(stderr);
    if (err != null) {
      console.log(err);
    }
  })
}

const args = process.argv.slice(2)
const filePath = args[0];

// Deploy the environment variables to the current Firebase alias project
readConfigFromFile(filePath)
.then(setFirebaseConfig)