Display the proper message log level when parsing project files

src/Uno.SourceGenerationHost.Shared/SourceGeneratorHost.cs

@@ -258,7 +258,19 @@ namespace Uno.SourceGeneration.Host
 				ws.LoadMetadataForReferencedProjects = true;
 
 				ws.WorkspaceFailed +=
-					(s, e) => this.Log().Error(e.Diagnostic.ToString());
+					(s, e) =>
+					{
+						switch (e.Diagnostic.Kind)
+						{
+							case WorkspaceDiagnosticKind.Warning:
+								this.Log().Warn(e.Diagnostic.Message);
+								break;
+
+							case WorkspaceDiagnosticKind.Failure:
+								this.Log().Error(e.Diagnostic.Message);
+								break;
+						}
+					};
 
 				var project = await ws.OpenProjectAsync(_environment.ProjectFile);
 

src/Uno.SourceGeneratorTasks.Shared/Tasks/SourceGenerationTask.cs

@@ -173,8 +173,12 @@ namespace Uno.SourceGeneratorTasks
 					{
 						var hostBinPath = Path.Combine(hostPath, "Uno.SourceGeneration.Host.dll");
 						string arguments = $"\"{hostBinPath}\" \"{responseFile}\" \"{outputFile}\" \"{binlogFile}\"";
-						var pi = new ProcessStartInfo("dotnet", arguments);
-						pi.UseShellExecute = false;
+						var pi = new ProcessStartInfo("dotnet", arguments)
+						{
+							UseShellExecute = false,
+							CreateNoWindow = true,
+							WindowStyle = ProcessWindowStyle.Hidden,
+						};
 
 						return pi;
 					}
@@ -182,8 +186,13 @@ namespace Uno.SourceGeneratorTasks
 					{
 						var hostBinPath = Path.Combine(hostPath, "Uno.SourceGeneration.Host.exe");
 						string arguments = $"\"{responseFile}\" \"{outputFile}\" \"{binlogFile}\"";
-						var pi = new ProcessStartInfo(hostBinPath, arguments);
-						pi.UseShellExecute = false;
+
+						var pi = new ProcessStartInfo(hostBinPath, arguments)
+						{
+							UseShellExecute = false,
+							CreateNoWindow = true,
+							WindowStyle = ProcessWindowStyle.Hidden,
+						};
 
 						return pi;
 					}