How to gets diagnostic logs directory and log file path from MTP extension.

[filzrev]

I want to gets following information inside MTP extension.

1. Diagnostic log directory that is specified with --diagnostic-output-directory argument.
2. Diagnostic log file path.

But these data seems not exposed to MTP extensions.
Because following limitation exists.

1.Gets diagnostic log directory that is specified with --diagnostic-output-directory argument.

It seems this information can't get via IConfiguration.

Because command line arguments is not registered as ConfigurationProvider.
And getting only some pre-defined arguments supported.

testfx/src/Platform/Microsoft.Testing.Platform/Configurations/AggregatedConfiguration.cs

Lines 29 to 39 in 689dd23

	if (key == PlatformConfigurationConstants.PlatformResultDirectory)
	{
	_resultsDirectory = GetResultsDirectoryCore(_commandLineParseResult);
	return _resultsDirectory;
	}
	if (key is PlatformConfigurationConstants.PlatformCurrentWorkingDirectory or PlatformConfigurationConstants.PlatformTestHostWorkingDirectory)
	{
	_currentWorkingDirectory = GetCurrentWorkingDirectoryCore();
	return _currentWorkingDirectory;
	}

var commandLineOptions = ServiceProvider.GetCommandLineOptions();
var serverMode = commandLineOptions.IsOptionSet("server");

Edit
I've confirmed it can get this information via ICommandLineOptions.
But when using this API, it need manually check testconfig.json setting also.

var commandLineOptions = serviceProvider.GetCommandLineOptions();
 var isDiagnosticEnabled = commandLineOptions.IsOptionSet("diagnostic");
bool isSuccess = commandLineOptions.TryGetOptionArgumentList("diagnostic-output-directory", out var values);

2. Gets diagnostic log file path

FileLogger is declared as internal.
So it can't get output path from ILogger without reflection.

I want some APIs for getting following information

1. diagnostic is enabled or not
2. Outputted diagnostic log file path.

Background

When running MTP tests with VS Test Explorer.
--diagnostic argument is implicitly specified. and log file is generated on every test runs.

But this information is not shown VS Output window.
So I want to print this information when running test on custom MTP extensions.