gradient stroke along path direction

[dani-ooo]

it would be great to be able to set gradients applied to a path's stroke to follow the direction of the stroke. apps like Adobe Illustrator already have this feature for vector graphics, and there are JS libraries that do it for web as well (see this article).

a behavior just like the <textPath> element. maybe as a direction attribute:

<path stroke="url(#gradient)" stroke-direction="path"/>

or as a orient attribute, currently available for the <marker> element:

<path stroke="url(#gradient)" orient="auto"/>

which could work for other stroke types like pattern and image.
and it could also allow to change the direction of the stroke:

<path stroke="url(#gradient)" stroke-direction="10"/>

<path stroke="url(#gradient)" orient="10deg"/>

<!-- for a 10 degree rotation of the gradient -->

[dani-ooo]

same proposal for patterns along path strokes. should it be a separate issue?