Вадим Кот

gulp.task('fileinclude', function() {
  return gulp.src(['app/index.html'])
    .pipe(fileinclude({
      prefix: '@@',
      basepath: '@file',
    }))
    .pipe(gulp.dest('./'));
});

gulp.task('sass', function () {
  return gulp.src('./assets/scss/*.scss')
    .pipe(sass({outputStyle: 'compressed'}).on('error', sass.logError))
    .pipe(autoprefixer({
      browsers: ["last 50 versions", "ie >= 9"],
      cascade: false
    }))
    .pipe(gulp.dest('./assets/css'));
});