const gulp   = require('gulp');
const watch = require('gulp-watch');
const clean = require('gulp-clean');
const shell = require('gulp-shell');

//watch changes in folder containing .ts files, delete the current bundle.js and rebuild the new bundle
gulp.task('build', function() {
  gulp.watch('src/js/components/**/*.ts', function(){
      gulp.src('dist/bundle.js', {read: false})
        .pipe(clean());
        gulp.src('/', {read: false})
        .pipe(shell([
    'npm run build'
  ]));
    });
});