TypeScript build automation in ASP.NET 5 (MVC6) using Gulp

# creates package.json
npm init

# install packages
npm install gulp gulp-typescript gulp-tslint gulp-tslint-stylish gulp-sourcemaps gulp-inject gulp-rimraf --save-dev

// Package imports
var gulp = require('gulp');
var typescript = require('gulp-typescript');
var tslint = require('gulp-tslint');
var tslintStyle = require('gulp-tslint-stylish');
var sourcemaps = require('gulp-sourcemaps');
var inject = require('gulp-inject');
var rimraf = require('gulp-rimraf');

// clean
gulp.task('clean', function () {
        gulp.src('wwwroot/js/app', { read: false })
            .pipe(rimraf())
});

// TS Lint
var tsLintConfig = require('./tslintConfig');
gulp.task('ts-lint', function () {
        gulp.src('wwwroot/**/*.ts')
            .pipe(tslint(tsLintConfig))
            .pipe(tslint.report(tslintStyle, {
                emitError: false,
                sort: true,
                bell: true
            }));
});

// TS Compile
gulp.task('ts-compile', ['ts-lint', 'clean'], function () {
        var tsResult = gulp.src('wwwroot/**/*.ts')
                           .pipe(sourcemaps.init())
                           .pipe(typescript());
        tsResult.js
            .pipe(sourcemaps.write('.'))
            .pipe(gulp.dest('wwwroot/js'));
});

// Inject
 gulp.task('inject', ['ts-compile'], function () {
        var target = gulp.src('wwwroot/index.html');
        var sources = gulp.src(['wwwroot/js/app/**/*.js'], { read: false });

target.pipe(inject(sources, { relative: true }))
          .pipe(gulp.dest('wwwroot'));
});

<!--injection comment-->
<!--inject:js-->
<!--endinject-->

// Watch
gulp.task('ts-watch', function () {
        gulp.watch('wwwroot/**/*.ts', ['inject']);
});

// Default task
gulp.task('default', ['inject']);

// ts-compile updated
gulp.task('ts-compile', ['ts-lint', 'clean'], function () {
        var tsResult = gulp.src('wwwroot/**/*.ts')
                           .pipe(sourcemaps.init())
                           .pipe(typescript());
        tsResult.js
            .pipe(sourcemaps.write(".", { sourceRoot: 'wwwroot/app' }))
            .pipe(gulp.dest('wwwroot/js'));
});