Unity build fails due to too long path hitting Windows path limtis

[reneschulte]

I cloned the repo to:
D:\Git\OpenSource\Microsoft\MixedReality-WorldLockingTools-Unity

Tried to build for UWP which failed building with this unclear error message: DirectoryNotFoundException: Could not find a part of the path "D:\Git\OpenSource\Microsoft\MixedReality-WorldLockingTools-Unity\Assets\MRTK\MixedRealityToolkit.Providers\WindowsMixedReality\DotNetAdapter\Plugins\net46\Microsoft.Windows.MixedReality.DotNetWinRT\Editor\Microsoft.Windows.MixedReality.DotNetWinRT.Editor.asmdef"

Looking at the long path I guessed it could be hitting the Windows path length limit, therefore I moved the project to the root on my D: disk and there it built just fine.

Not sure what can be done here as it seems to come from the MRTK but might be worth to look into. My typical subfolder I tried to use initially is not extraordinary long and I would expect others to run into the same issue.

[wiwei]

With the upcoming release, this should be alleviated (i.e. we did some work in MRTK itself to not have such a crazy long path).

That being said, I think that you'll still likely hit this with longer prefix paths to projects, so to some degree having it be closer to root is still probably good to do.

[fast-slow-still]

Nice detective work, Rene. I will follow up on this. At the very least I can document this in the setup guide to augment the "unclear error message". Thanks!

[reneschulte]

The warning you added seems not to work as expected:
#32 (comment)

Anyhow, no big deal if the MRTK update will solve this anyway.