Cracked Texture Aligned with Font Direction? - how to?

I am not entirely sure what you are after but you've mentioned a directional texture, so see if this helps.

Make your Type layer and go Type > Create Work Path

Now you need your texture to be in the form of a brush preset.  I am going to use this Aaron Blaise hair preset

It's Angle Jitter is already set to Direction but that doesn't work for our purpose so I have roated the brush 90°

Now add a layer above the type layer, and clip it to the Type layer.

Note I have made the text a lighter colour to better contrast the texture.

Select the clipped layer.

Select a contrasting colour.

Right click the work path and chose Stroke Path

When the dialog box appears choose Brush, and makes sure Simulate Pressure is not checked.

I played with brush size and spacing for best effect, but I think you'll get the idea

Just to clarify, the brush follows the path which outlines the text, so if we unclip the layer we can the full effect of the stroked path.  

There are all sorts of options you can use from here.  Turn off the Type layer, but use it to create a layer mask for the layer with the stroked path, and invert the layer mask for instance.

In Photoshop that seems difficult and may ultimately need pretty much manual painting. 

But you could certainly create a Brush (or several) with scraggly lines.