tarifa-watch.js

gulp.task('watch', ['compile'], function() {
    var assets = Assets.ts.src.files.concat(Assets.styl.src.files);
    gulp.src(assets)
        .pipe(watch(assets))
        .pipe(plumber())
        .pipe(exec('tarifa build web', {
            pipeStdout: true
        }))
        .pipe(exec.reporter({
            err: true,
            stderr: true,
            stdout: true
        }));
});