Fix bootstrapper task not running when targeting win-* RIDs on non-Windows host platforms (#45)

Author: Tyrrrz

DotnetRuntimeBootstrapper/BootstrapperTask.cs

@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using System.Reflection;
+using System.Runtime.InteropServices;
 using System.Text;
 using DotnetRuntimeBootstrapper.Utils.Extensions;
 using Microsoft.Build.Framework;
@@ -15,6 +16,13 @@ public class BootstrapperTask : Task
 {
     private Version Version { get; } = Assembly.GetExecutingAssembly().GetName().Version;
 
+    public string? RuntimeIdentifier { get; init; }
+
+    public bool IsWindowsTarget =>
+        string.IsNullOrWhiteSpace(RuntimeIdentifier)
+            && RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
+        || RuntimeIdentifier?.StartsWith("win", StringComparison.OrdinalIgnoreCase) == true;
+
     [Required]
     public required string Variant { get; init; }
 
@@ -130,10 +138,18 @@ private void InjectResources()
     public override bool Execute()
     {
         Log.LogMessage("Version: '{0}'.", Version);
+        Log.LogMessage("Runtime identifier: '{0}'.", RuntimeIdentifier);
         Log.LogMessage("Variant: '{0}'.", Variant);
         Log.LogMessage("Prompt required: '{0}'.", IsPromptRequired);
         Log.LogMessage("Target: '{0}'.", TargetFilePath);
 
+        // Currently only Windows is supported
+        if (!IsWindowsTarget)
+        {
+            Log.LogMessage("Target platform is not Windows. Boostrapper will not be created.");
+            return true;
+        }
+
         ExtractAppHost();
         InjectConfiguration();
         InjectResources();

DotnetRuntimeBootstrapper/DotnetRuntimeBootstrapper.targets

@@ -1,21 +1,8 @@
-<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
-
-  <Target Name="CheckBootstrapperPrerequisites" BeforeTargets="CreateBootstrapperAfterBuild;CreateBootstrapperAfterPublish">
-    <!-- Warning: not .NET Core -->
-    <Warning
-      Condition="'$(TargetFrameworkIdentifier)' != '.NETCoreApp'"
-      Code="DRB_NOT_NETCORE"
-      Text="Project is not targeting .NET Core. Bootstrapper will not be created." />
-
-    <!-- Warning: not Windows target platform -->
-    <Warning
-      Condition="!$([MSBuild]::IsOsPlatform('Windows'))"
-      Code="DRB_NOT_WINDOWS"
-      Text="Target platform is not Windows. Boostrapper will not be created." />
-  </Target>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0" TreatAsLocalProperty="IsNetCoreApp;IsWindowsTarget;CanGenerateBootstrapper">
 
+  <!-- Bootstrapper on build -->
   <Target
-    Condition="$(GenerateBootstrapperOnBuild) AND '$(TargetFrameworkIdentifier)' == '.NETCoreApp' AND $([MSBuild]::IsOsPlatform('Windows'))"
+    Condition="$(GenerateBootstrapperOnBuild)"
     Name="CreateBootstrapperAfterBuild"
     AfterTargets="Build">
     <PropertyGroup>
@@ -26,13 +13,14 @@
     </PropertyGroup>
 
     <BootstrapperTask
+      RuntimeIdentifier="$(RuntimeIdentifier)"
       Variant="$(BootstrapperVariant)"
       IsPromptRequired="$(BootstrapperPromptRequired)"
       TargetFilePath="$(TargetPath)" />
   </Target>
 
+  <!-- Bootstrapper on publish -->
   <Target
-    Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp' AND $([MSBuild]::IsOsPlatform('Windows'))"
     Name="CreateBootstrapperAfterPublish"
     AfterTargets="Publish">
     <PropertyGroup>
@@ -43,6 +31,7 @@
     </PropertyGroup>
 
     <BootstrapperTask
+      RuntimeIdentifier="$(RuntimeIdentifier)"
       Variant="$(BootstrapperVariant)"
       IsPromptRequired="$(BootstrapperPromptRequired)"
       TargetFilePath="$([System.IO.Path]::Combine('$(ProjectDir)', '$(PublishDir)/$(AssemblyName).dll'))" />