Simple Gulpfile to use with underscores "_s" theme

gulpfile.js

'use strict';

var gulp = require( 'gulp' );
var browserSync = require( 'browser-sync' ).create();
var sass = require( 'gulp-ruby-sass' );
var del = require( 'del' );

gulp.task( 'sass', function() {
    return sass( 'sass/style.scss' )
        .on( 'error', sass.logError )
        .pipe( gulp.dest( './' ) )
        .pipe( browserSync.stream() );
} );

gulp.task( 'serve', function() {
    browserSync.init( {
        files: [ './**/*.php', '*.php' ],
        proxy: 'http://wp3.dev',
    } );
    gulp.watch( [ './sass/**/*.scss' ], [ 'sass' ] );
} );

package.json

{
  "name": "THEME NAME",
  "version": "1.0.0",
  "description": "WordPress Theme",
  "author": "Enrique Chavez",
  "license": "GPL-3.0",
  "devDependencies": {
    "browser-sync": "^2.9.11",
    "gulp-ruby-sass": "^2.0.4",
    "wiredep": "^2.2.2"
  }
}