T4.BuildTools fails to preprocess template in non-root direcftory

[deniszykov]

Transform seems fine, but preprocess fails for non-root paths.
It seems no directory existence check is made before writing a output file.

Include item:

<T4Preprocess Include="CodeGeneration\CSharp73\CSharp73GameDataGenerator.tt"/>

Error message:

0>CSharp73GameDataGenerator.cs(-1,-1): Error  : Internal error: System.IO.DirectoryNotFoundException: Could not find a part of the path '\projects\ProjectName\src\ProjectName\obj\Release\net472\TextTransform\CodeGeneration\CSharp73\CSharp73GameDataGenerator.cs'.
   at Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
   at System.IO.File.OpenHandle(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize)
   at System.IO.File.WriteToFile(String path, FileMode mode, String contents, Encoding encoding)
   at Mono.TextTemplating.Build.TextTransformProcessor.WriteOutput(MSBuildTemplateGenerator generator, String outputFile, String outputContent, Encoding encoding) in /_/Mono.TextTemplating.Build/TextTransformProcessor.cs:line 184

[UweLesta]

The following works for me with package <PackageReference Include="T4.BuildTools" Version="3.0.0" /> :
(windows Vs2022 net8.0)

	<PropertyGroup>
		<TransformOnBuild>true</TransformOnBuild>
		<T4DefaultNamespace>EfScaffolding.CodeTemplate.EFCore</T4DefaultNamespace>
		<TransformOutOfDateOnly>false</TransformOutOfDateOnly>
		<UseLegacyT4Preprocessing>true</UseLegacyT4Preprocessing>
	</PropertyGroup>

	<ItemGroup>
		<T4Preprocess Include="EfScaffolding\CodeTemplates\EFCore\DbContext.t4" />
		<T4Preprocess Include="EfScaffolding\CodeTemplates\EFCore\EntityTypeModel.t4" />
	</ItemGroup>
	
	<ItemGroup>
		<Compile Update="EfScaffolding\CodeTemplates\EFCore\*.cs">
			<DependentUpon>%(Filename).t4</DependentUpon>
			<DesignTime>True</DesignTime>
			<AutoGen>True</AutoGen>
		</Compile>
	</ItemGroup>

[deniszykov]

Thanks @UweLesta, workaround works.
Still, bug exists and should be fixed.