Ubuntu: Build fails with missing HAL/PlatformFileManager.h

[mrmowgli]

[2429/2806] Link (lld) libUE4Editor-DatasmithImporter.so
In file included from /home/mrmowgli/UnrealEngine/Engine/Plugins/Runtime/HoudiniEngine/Intermediate/Build/Linux/B4D820EA/UE4Editor/Development/HoudiniEngineEditor/Module.HoudiniEngineEditor.1_of_3.cpp:10:
/home/mrmowgli/UnrealEngine/Engine/Plugins/Runtime/HoudiniEngine/Source/HoudiniEngineEditor/Private/HoudiniEngineEditor.cpp:56:10: fatal error: 'HAL/PlatformFileManager.h' file not found

I did a search and that file isn't present in the project.

I followed the directions from the Readme.md, downloaded UnrealEngine 4.26.2-release, cloned this repo into the Engine/Plugins/Runtime/HoudiniEngine folder, made sure the Houdini environment variables were set, ran Unreal's setup.sh, ran GenerateProjectFiles.sh and then make UE4Editor. It fails consistently and it's clear the file isn't generated.

[mrmowgli]

This appears to be a regression of bad file naming. See: https://github.com/sideeffects/HoudiniEngineForUnreal-v2/pull/149

However the current naming is needed for the ShaderCompilerWorker, so it looks like some additional fixes are needed to get everything working. I got it to compile by copying PlatformFilemanager.h to PlatformFileManager.h. Since both filename cases are used, moving it to the correct camel case doesn't actually work for a full build.