gulpfile.js

var gulp   = require('gulp');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
 
gulp.task('default', function() {
    return gulp.src('bootstrap-hover-dropdown.js')

        // minifiy preserving preserved comments
        .pipe(uglify({
            preserveComments: 'some'
        }))

        // rename to .min.
        .pipe(rename('bootstrap-hover-dropdown.min.js'))
        
        .pipe(gulp.dest('.'));
});


var fs          = require('fs');
var bump        = require('gulp-bump');
var filter      = require('gulp-filter');
var git         = require('gulp-git');
var tagVersion  = require('gulp-tag-version');
var replace     = require('gulp-replace');
var streamqueue = require('streamqueue');
 
/**
 * Bumping version number and tagging the repository with it.
 * Please read http://semver.org/
 *
 * You can use the commands
 *
 *     gulp patch     # makes v0.1.0 → v0.1.1
 *     gulp feature   # makes v0.1.1 → v0.2.0
 *     gulp release   # makes v0.2.1 → v1.0.0
 *
 * To bump the version numbers accordingly after you did a patch,
 * introduced a feature or made a backwards-incompatible release.
 */
function increment(importance) {
    var packages = ['package.json', 'bower.json', 'composer.json'];
    var currentVersion = JSON.parse(fs.readFileSync('bower.json')).version;

    // get all the files to bump version in 
    gulp.src(packages)

        // bump the version number in those files 
        .pipe(bump({ type: importance }))

        // save it back to filesystem 
        .pipe(gulp.dest('.'))

        .on('end', function () {
            var newVersion = JSON.parse(fs.readFileSync('bower.json')).version;

            var packagesStream = gulp.src(packages);
            
            var jsStream = gulp.src(['bootstrap-hover-dropdown.js', 'bootstrap-hover-dropdown.min.js'])

                // replace version # in the JS files
                .pipe(replace('Version: v' + currentVersion, 'Version: v' + newVersion))

                // save it back to filesystem 
                .pipe(gulp.dest('.'));

            // merge the streams together to commit
            streamqueue({ objectMode: true }, jsStream, packagesStream)

                // commit the changed version number 
                .pipe(git.commit('bump packages\' version'))
                
                // read only one file to get the version number 
                .pipe(filter('package.json'))

                // **tag it in the repository** 
                .pipe(tagVersion());
        });
}
 
gulp.task('patch',   ['default'], function() { return increment('patch'); });
gulp.task('feature', ['default'], function() { return increment('minor'); });
gulp.task('release', ['default'], function() { return increment('major'); });