// The relative path from the css directory to the sass directory.
$image-url-path-to-source: '../sass' !default;
// The relative path from the root sass directory to where your components usually lie.
$image-url-subdirectory: 'components' !default;

// image-url()
//
// If you include your images next to your component Sass files, you need to
// specify a url() to point from the generated CSS to the Sass source like this:
//
// ```css
// content: url(../sass/components/is-quite/long.svg);
// ```
//
// With the `image-url()` function the path to all your components is assumed to
// start with `../sass/components/` and you just need to give it the last, short
// bit of the path in your Sass code like this:
//
// ```scss
// content: image-url(is-quite/short.svg);
// ```
//
// If you want to point at an image that is not in the components sub-directory
// of your sass directory, you can override the default $subdirectory by
// passing it in as the first parameter of `image-url()` like this:
//
// ```scss
// content: image-url(base, grouping/blockquote.svg);
// ```
//
// which would output `url(../sass/base/grouping/blockquote.svg)`.
//
// $subdirectory   = $image-url-subdirectory - Optional. The relative path from
//                   the root of your Sass source to the sub-directory where
//                   components usually lie.
// $path           - Required. The path to the image relative to the
//                   `$subdirectory`.
// $path-to-source = $image-url-path-to-source - Optional. The relative path
//                   from the css build directory to the sass source directory.
@function image-url($subdirectory, $path: null, $path-to-source: $image-url-path-to-source) {
  // If only 1 parameter is given, its value is intended for the $path.
  @if type-of($path) == 'null' {
    $path: $subdirectory;
    $subdirectory: $image-url-subdirectory;
  }
  @return url(unquote($path-to-source + '/' + $subdirectory + '/' + $path));
}