--data-path command line option not working

[SRSaunders]

It appears the --data-path command line option is not hooked up inside the code. I can successfully run the samples via the command line when my working dir is the home installation directory (i.e. Vulkan-Samples). However, if I cd to the executable dir and try to run from there using the --data-path option, the samples fail to load the shaders.

Looking at the code, --data-path does successfully set the external_storage_directory static variable inside platform.h but that's about it. When the shaders are loaded the code uses _external_storage_directory from std_filesystem.h to form the path which does not equal external_storage_directory from platform.h.

I am running on macOS, but I suspect this is also a problem on linux. Note this prevents me from using Xcode to run and debug.

[SaschaWillems]

Thanks for bringing this up. And yes, you're right, I guess this was broken with #894 or maybe never worked at all. We'll take a look.