gulp.js

var gulp = require('gulp');
var shell = require('gulp-shell');
var inject = require('gulp-inject');
var replace = require('gulp-html-replace');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');

var runSequence = require('run-sequence');


gulp.task('js', function() {
    return gulp.src(['jspm_packages/traceur-runtime.js', 'build.js'])
        .pipe(concat('app.js'))
        .pipe(uglify())
        .pipe(gulp.dest('.'));
});


gulp.task('jspm', shell.task([
  'jspm bundle-sfx --minify lib/main'
]));

gulp.task('build', runSequence('jspm', 'js'), function() {
    var target = gulp.src('./index.html');

    var sources = gulp.src(['app.js']);

    target.pipe(inject(sources))
        .pipe(gulp.dest('.'));

    return target.pipe(inject(
        gulp.src(['./import.js']), {
            starttag: '<!-- inject:jsdev -->',
            transform: function(filepath, file) {
                return inject.transform.apply('');
            }
        }))
        .pipe(gulp.dest('.'));
});

gulp.task('dev', function() {
    var target = gulp.src('./index.html');

    var sources = gulp.src(['jspm_packages/system.js', 'config.js']);

    target.pipe(inject(sources))
        .pipe(gulp.dest('.'));

    return target.pipe(inject(
        gulp.src(['./import.js']), {
            starttag: '<!-- inject:jsdev -->',
            transform: function(filepath, file) {
                return file.contents.toString('utf8')
            }
        }))
        .pipe(gulp.dest('.'));
});