@SequenceTask()
 build() {
     return [
         'clean:dist',
         ['sass', 'ts', 'useref', 'images', 'fonts']
     ];
 }

 /**
  * Creates a package that can be published to npm.
  */
 @SequenceTask()
 package() {
     return [
         "clean",
         "compile",
         ["packageFiles", "packagePreparePackageFile", "packageReadmeFile", "copyTypingsFile"]
     ];
 }

 @SequenceTask('run')
 build() {
   return ['copy-source-files', 'pug', 'tsd'];
 }

 /**
  * Compiles the code and runs tests.
  */
 @SequenceTask()
 tests() {
     return ["compile", "tslint", "unit"];
 }

	@SequenceTask()
	build() {
		return ["ts::compile"];
	}

 /**
  * Creates a package and publishes it to npm.
  */
 @SequenceTask()
 publish() {
     return ["package", "npmPublish"];
 }

 @SequenceTask('watch') // this special annotation using "run-sequence" module to run returned tasks in sequence
 watch(): any {
   return gulp.watch(this.config.paths.source, ['build']);
 }

 @SequenceTask('default')
 default() { // because this task has "default" name it will be run as default gulp task
   return ['build', 'watch'];
 }

 @SequenceTask()
 testBuild() {
     return ['clean', 'configureEnvironment', 'buildTypescript'];
 }

 @SequenceTask('build') // this special annotation using "run-sequence" module to run returned tasks in sequence
 build() {
   return [['clean::dist', 'ts::lint'], 'ts::compile'];
 }