gulpfile.js

var gulp = require('gulp');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var gfi = require('gulp-file-insert');
var header = require('gulp-header');
var pkg = require('./package.json');

var banner = ['/**',
    ' * <%= pkg.name %> - <%= pkg.description %>',
    ' * @version v<%= pkg.version %>',
    ' * @link <%= pkg.homepage %>',
    ' * @license <%= pkg.license %>',
    ' */',
    '',
    ''].join('\n');

gulp.task('compress', function() {
    gulp.src('js/*.js')
        .pipe(header(banner, { pkg : pkg } ))
        .pipe(gulp.dest('dist'))
        .pipe(uglify())
        .pipe(header(banner, { pkg : pkg } ))
        .pipe(rename({
            extname: '.min.js'
        }))
        .pipe(gulp.dest('dist'))
});

gulp.task('default', [ 'compress' ]);