Be sure to replace `mytheme` with your theme's directory name on lines 59 and 62

magento-boilerplate-cache-bust-gulpfile.js

var gulp = require('gulp');

var less = require('gulp-less');
var minifycss = require('gulp-minify-css');

var jshint = require('gulp-jshint');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');
var replace = require('gulp-replace');

var notify = require('gulp-notify');

gulp.task('less', function() {
  gulp
    .src('less/style.less')
    .pipe(less().on("error", notify.onError(function (error) {
      return "Error compiling LESS: " + error.message;
    })))
    // .pipe(minifycss())
    .pipe(gulp.dest('dist/css'))
    .pipe(notify({
      message: 'Successfully compiled LESS'
    }));
});

gulp.task('lint', function() {
  gulp
    .src('js/script.js')
    .pipe(jshint())
    .pipe(jshint.reporter('default'));
});

gulp.task('js', function() {
  gulp
    .src([
      'components/jquery/dist/jquery.min.js',
      'components/bootstrap/js/transition.js',
      'components/bootstrap/js/collapse.js',
      'components/bootstrap/js/carousel.js',
      'components/bootstrap/js/dropdown.js',
      'components/bootstrap/js/modal.js',
      'js/script.js'
    ])
    .pipe(concat('script.js'))
    // .pipe(uglify())
    .pipe(gulp.dest('dist/js'))
    .pipe(notify({
      message: 'Successfully compiled JS'
    }));
});

var hashes = {};
gulp.task('hash', function(){
  hash('dist/js/script.js');
  hash('dist/css/style.css');
})

gulp.task('bust', function(){
  gulp.src(['../../design/responsive/layout/local.xml'])
    .pipe(replace(/(dist\/js\/script\.js)[^<]*/, '$1?v='+hashes['dist/js/script.js']))
    .pipe(replace(/(dist\/css\/style\.css)[^<]*/, '$1?v='+hashes['dist/css/style.css']))
    .pipe(gulp.dest('../../design/responsive/layout'))
})

function hash(filename) {
  var crypto = require('crypto');
  var fs = require('fs');
  var shasum = crypto.createHash('sha1');
  hashes[filename] = hashes[filename] ? hashes[filename] : {};

  var s = fs.ReadStream(filename);
  s.on('data', function(d) {
    shasum.update(d);
  });

  s.on('end', function() {
    hashes[filename] = shasum.digest('hex').substr(0,8);
    gulp.run('bust')
  });
}

gulp.task('default', ['less', 'lint', 'js', 'hash'], function() {

  gulp.watch('less/**/*.less', function() {
    gulp.run('less');
    gulp.run('hash');
  });

  gulp.watch('js/**/*.js', function() {
    gulp.run('lint');
    gulp.run('js');
    gulp.run('hash');
  });
});

magento-boilerplate-package.json

{
  "devDependencies": {
    "gulp": "~3.4.0",
    "gulp-less": "~1.1.10",
    "gulp-notify": "~0.3.4-2",
    "gulp-minify-css": "~0.2.0",
    "gulp-uglify": "~0.1.0",
    "gulp-concat": "~2.1.7",
    "gulp-jshint": "~1.3.4",
    "gulp-replace": "~0.2.0",
    "event-stream": "~3.1.0"
  }
}