Sync a Firebase App + Functions with Gulp automatically.

sync-firebase-gulpfile.js

'use strict';
const gulp = require('gulp')
    ,watch = require('gulp-watch')
    ,dir = '/home/ubuntu/workspace/app'
    ,fnDir = '/home/ubuntu/workspace/functions'
    ,version = 'prod'
    ,useVersion = false
    ,comando = "firebase deploy "
    ,comandoParams = " -P " +version+ " "
    ,comandOnlyFnc = " --only functions "
    ,log = msg => console.log(msg)
    ,info = () => {
        log('Watching Firebase App in ' + dir)
        log('Watching Firebase Functions in ' + fnDir)
    }
    ,write = (data) => {
        
        for (let i = 0; i < data.history.length; i++) {
            
            let archiveLocal = data.history[i]
                ,valid = true
            ;
            
            if (archiveLocal.indexOf('/.') >= 0) {
                valid = false; //ignore .git, .ssh, etc
            }

            if (valid) {

                let exec = require('child_process').exec
                    ,offset = -4.0//EST
                    ,clientDate = new Date()
                    ,utc = clientDate.getTime() + (clientDate.getTimezoneOffset() * 60000)
                ;

                let serverDate = new Date(utc + (3600000 * offset));

                if (useVersion) {
                    console.log(comando,' ',comandoParams,' ',archiveLocal,' - ',data.event, ' @ ',serverDate.toLocaleString())
                    exec(comando + ' ' + comandoParams)
                }
                else {
                    console.log(comando,' ',archiveLocal,' - ',data.event,' @ ',serverDate.toLocaleString())
                    exec(comando)
                }
            }
        }
    }
;

info();

gulp.task('default', ['syncFirebaseApp','syncFirebaseFuncs']);

gulp.task('syncFirebaseApp', () => watch(dir, (data) => write(data)));
gulp.task('syncFirebaseFuncs', () => watch(fnDir, (data) => write(data)));