--platform-version option for oryx build command is from the App Setting FUNCTION_EXTENSION_VERSION

[horihiro]

When setting FUNCTION_WORKER_RUNTIME to dotnet and ENABLE_ORYX_BUILD to true, the option --platform-version of the oryx build command seems to be from an App Setting FUNCTION_EXTENSION_VERSION.

For example, if setting FUNCTION_EXTENSION_VERSION to ~4,

the command option is set to --platform-version ~4 as the following screenshot.

It means when building by using .NET5/6 SDK, the App Setting FUNCTION_WORKER_RUNTIME should be set to ~5/~6.
Of course, these values are invalid for the function host, then the host is down by the setting.

Could you please check if this is expected behavior?

The codes for selecting the version are these lines.

KuduLite/Kudu.Core/Deployment/Oryx/FunctionAppOryxArguments.cs

Lines 87 to 92 in 3854066

	var workerVersion = ResolveWorkerRuntimeVersion(FunctionsWorkerRuntime);
	if (!string.IsNullOrEmpty(workerVersion))
	{
	Version = workerVersion;
	OryxArgumentsHelper.AddLanguageVersion(args, workerVersion);
	}