How to generate 2 SASS files in Gulp?

Question

gulp.js

There are several SASS files (conditionally style.scss and fonts.scss). How to force the first one to be generated in style.css and the last one in fonts.css?
Tried like this:

gulp.task('sass', function () {
  return gulp.src('app/sass/style.scss', 'app/sass/fonts.scss')
      .pipe(sass())
      .pipe(autoprefixer(['last 15 versions', '> 1%', 'ie 8', 'ie 7'], {cascade: true}))
      .pipe(gulp.dest('app/css'))
});

So:

gulp.task('sass', function () {
  return gulp.src(['app/sass/style.scss', 'app/sass/fonts.scss'], { base: '.' })
      .pipe(sass())
      .pipe(autoprefixer(['last 15 versions', '> 1%', 'ie 8', 'ie 7'], {cascade: true}))
      .pipe(gulp.dest('.'))
});

Answer 1

It makes no sense to process multiple files. It is enough to write:

return gulp.src('app/scss/main.scss')
  .pipe(sass())
...

and in main.scss connect all other files via import

Answer 2

app/sass/*.scss