My first gulpfile

gulpfile.js

var gulp = require('gulp');
var shell = require('gulp-shell');
var preprocess = require('gulp-preprocess');
var template = require('gulp-template');
var os = require('os');
var _ = require('underscore');
//var replace = require('gulp-replace');
//var inject = require('gulp-inject');

gulp.task('redis', shell.task('redis-server > /dev/null &'))

var networkInterfaces = (os.networkInterfaces().eth0 || os.networkInterfaces().en0);
var local_ip = _.where(networkInterfaces, {"family": "IPv4"})[0].address;
console.log('local ip', local_ip);

var env = process.env.NODE_ENV || 'development';
var config = {
    weinre_host: local_ip + ':8080',
    use_weinre: true
}

gulp.task('weinre', shell.task('weinre --boundHost -all- -v '))

gulp.task('config', function () {
    gulp.src('public/src/index.html')
        .pipe(template({weinre_host: config.weinre_host}))
        .pipe(preprocess({context: {NODE_ENV: env, DEBUG: true}}))
        .pipe(gulp.dest('public/disc'))
})

gulp.task('dev_run',
    shell.task('node server.js --name="payment-sdk-server" --watch')
)

gulp.task('run',
    shell.task('pm2 startOrRestart processes.json --name="payment-sdk-server" --watch')
)

gulp.task('dev_env', ['redis', 'weinre', 'config', 'dev_run'])
gulp.task('test_env', ['redis', 'weinre', 'config', 'run'])
gulp.task('prod_env', ['redis', 'config', 'run'])