Merge pull request #101 from nventive/dev/jela/single-use-mode

Expose single-use host mode parameter

.vsts-ci.yml

@@ -78,6 +78,13 @@ jobs:
 
 - job: macOS
 
+  strategy:
+    matrix:
+      Xamarin_5_16_0:
+        XamarinVersion: 5_16_0
+      Xamarin_5_12_0:
+        XamarinVersion: 5_12_0
+
   variables:
     NUGET_PACKAGES: $(Agent.WorkFolder)\.nuget
 
@@ -90,6 +97,9 @@ jobs:
       versionSpec: 4.7.0
       checkLatest: false
 
+  - bash: /bin/bash -c "sudo $AGENT_HOMEDIRECTORY/scripts/select-xamarin-sdk.sh $(XamarinVersion)"
+    displayName: Select Xamarin Version
+
   - bash: msbuild /r /p:Configuration=Release ./src/Uno.SourceGenerator.Linux.sln # /bl:$(build.artifactstagingdirectory)/macos-build.binlog
     displayName: Build
     

src/Uno.SourceGeneratorTasks.Dev15.0/Content/Uno.SourceGenerationTasks.targets

@@ -19,6 +19,9 @@
 
 	<!-- Disable the host controller when running outside of VS -->
 	<UnoSourceGeneratorUseGenerationController Condition="'$(BuildingInsideVisualStudio)'=='' and '$(UnoSourceGeneratorUseGenerationController)'==''">false</UnoSourceGeneratorUseGenerationController>
+
+	<!-- Enables the out of process single-use generation host -->
+	<UnoSourceGeneratorUseGenerationHost Condition="'$(UnoSourceGeneratorUseGenerationHost)'==''">true</UnoSourceGeneratorUseGenerationHost>
   </PropertyGroup>
 
   <ItemGroup>
@@ -126,6 +129,7 @@
 							  TargetFrameworkRootPath="$(TargetFrameworkRootPath)"
 							  AdditionalAssemblies="@(SourceGeneratorAdditionalAssemblies)"
 							  UseGenerationController="$(UnoSourceGeneratorUseGenerationController)"
+							  UseGenerationHost="$(UnoSourceGeneratorUseGenerationHost)"
 							  CaptureGenerationHostOutput="$(UnoSourceGeneratorCaptureGenerationHostOutput)"
 							  BinLogOutputPath="$(UnoSourceGeneratorBinLogOutputPath)"
 							  BinLogEnabled="$(UnoSourceGeneratorUnsecureBinLogEnabled)"

src/Uno.SourceGeneratorTasks.Dev15.0/Tasks/SourceGenerationTask.cs

@@ -58,10 +58,15 @@ namespace Uno.SourceGeneratorTasks
 		public string CaptureGenerationHostOutput { get; set; }
 
 		/// <summary>
-		/// Enables the use of the GenerationController mode.
+		/// Enables the use of the Generation Controller mode.
 		/// </summary>
 		public string UseGenerationController { get; set; } = bool.TrueString;
 
+		/// <summary>
+		/// Enables the use of the Generation Host mode.
+		/// </summary>
+		public string UseGenerationHost { get; set; } = bool.TrueString;
+
 		/// <summary>
 		/// Provides a list of assemblies to be loaded in the SourceGenerator
 		/// secondary app domains. This is a backward compatibility feature related
@@ -112,7 +117,7 @@ namespace Uno.SourceGeneratorTasks
 				{
 					GenerateWithHostController();
 				}
-				else if(IsMonoMSBuildCompatible || RuntimeHelpers.IsNetCore)
+				else if(SupportsGenerationHost)
 				{
 					GenerateWithHost();
 				}
@@ -157,6 +162,11 @@ namespace Uno.SourceGeneratorTasks
 				|| RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
 			);
 
+		public bool SupportsGenerationHost
+			=> (bool.TryParse(UseGenerationHost, out var result) && result)
+			&& (
+				IsMonoMSBuildCompatible || RuntimeHelpers.IsNetCore
+			);
 
 		private void GenerateWithHostController()
 		{
@@ -404,7 +414,6 @@ namespace Uno.SourceGeneratorTasks
 			string.Compare(FileVersionInfo.GetVersionInfo(new Uri(typeof(Microsoft.Build.Utilities.Task).Assembly.Location).LocalPath).FileVersion, "16.0") >= 0
 			|| RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
 
-
 		private BuildEnvironment CreateBuildEnvironment()
 			=> new BuildEnvironment
 			{