Static asset revisioning by datestamp (yyyyMMdd) with version number (xx) to filenames: index_app.js => index_app.20160510-00.js. If there is no difference file to be created with the latest version, the file is not created. Otherwise, it creates a version with a mask. The first day is numbered as version 00.
$ npm install --save-dev gulp-date-rev
var gulp = require('gulp');
var rev = require('gulp-date-rev');
var DIST_FOLDER = 'dist';
gulp.task('default', function () {
return gulp.src('src/*.js')
.pipe(rev(DIST_FOLDER))
.pipe(gulp.dest(DIST_FOLDER));
});The directory which stores the old version and the new will be created (if necessary).