• Make sprites from each of *.sprite directories under the root
• Each sprite is a separate image
• Stylus mixin and config with sprite positions are also supplied

Usage:

gulp.task('sprite', taskSprite({
  spritesSearchFsRoot: 'app',
  spritesWebRoot: '/img',
  spritesFsDir: '/path/to/site/www/img',
  styleFsDir: '/path/to/site/app/stylesheets'
}));

• spritesSearchFsRoot - the source root, sprites are searched as spritesSearchFsRoot/**/dir.sprite.
• spritesWebRoot: - path in CSS to sprite image will be /img/dir.png
• spritesWebRoot - generated sprite images will be stored in this dir here.
• styleFsDir - stylus file with sprite mixins and coords will be put here

Thanks to @serheyshmyg for discussions and the draft version.