Updates for trimming compatibility

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Install .NET SDK
         uses: actions/setup-dotnet@v3.0.3
         with:
-          dotnet-version: 7.0.x
+          dotnet-version: 8.0.x
       - name: Build
         run: dotnet build LibGit2Sharp.sln --configuration Release
       - name: Upload packages
@@ -30,6 +30,8 @@ jobs:
           name: NuGet packages
           path: bin/Packages/
           retention-days: 7
+      - name: Verify trimming compatibility
+        run: dotnet publish TrimmingTestApp
   test:
     name: Test / ${{ matrix.os }} / ${{ matrix.arch }} / ${{ matrix.tfm }}
     runs-on: ${{ matrix.os }}
@@ -51,6 +53,7 @@ jobs:
         uses: actions/setup-dotnet@v3.0.3
         with:
           dotnet-version: |
+            8.0.x
             7.0.x
             6.0.x
       - name: Run ${{ matrix.tfm }} tests

LibGit2Sharp.Tests/CloneFixture.cs

@@ -267,7 +267,7 @@ public void CanInspectCertificateOnClone(string url, string hostname, Type certT
                             Assert.True(valid);
                             var x509 = ((CertificateX509)cert).Certificate;
                             // we get a string with the different fields instead of a structure, so...
-                            Assert.Contains("CN=github.com,", x509.Subject);
+                            Assert.Contains("CN=github.com", x509.Subject);
                             checksHappy = true;
                             return false;
                         }

LibGit2Sharp/Core/GitObjectLazyGroup.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using LibGit2Sharp.Core.Handles;
 
 namespace LibGit2Sharp.Core
@@ -21,7 +22,12 @@ protected override void EvaluateInternal(Action<ObjectHandle> evaluator)
             }
         }
 
+#if NET
+        public static ILazy<TResult> Singleton<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] TResult>(Repository repo, ObjectId id, Func<ObjectHandle, TResult> resultSelector, bool throwIfMissing = false)
+#else
         public static ILazy<TResult> Singleton<TResult>(Repository repo, ObjectId id, Func<ObjectHandle, TResult> resultSelector, bool throwIfMissing = false)
+#endif
+
         {
             return Singleton(() =>
             {

LibGit2Sharp/Core/LazyGroup.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 
 namespace LibGit2Sharp.Core
 {
@@ -44,7 +45,11 @@ public void Evaluate()
 
         protected abstract void EvaluateInternal(Action<T> evaluator);
 
+#if NET
+        protected static ILazy<TResult> Singleton<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] TResult>(Func<TResult> resultSelector)
+#else
         protected static ILazy<TResult> Singleton<TResult>(Func<TResult> resultSelector)
+#endif
         {
             return new LazyWrapper<TResult>(resultSelector);
         }
@@ -90,7 +95,11 @@ void IEvaluator<TInput>.Evaluate(TInput input)
             }
         }
 
+#if NET
+        protected class LazyWrapper<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] TType> : Lazy<TType>, ILazy<TType>
+#else
         protected class LazyWrapper<TType> : Lazy<TType>, ILazy<TType>
+#endif
         {
             public LazyWrapper(Func<TType> evaluator)
                 : base(evaluator)

LibGit2Sharp/Core/NativeMethods.cs

@@ -102,7 +102,7 @@ private static IntPtr ResolveDll(string libraryName, Assembly assembly, DllImpor
                 {
                     // The libraries are located at 'runtimes/<rid>/native/lib{libraryName}.so'
                     // The <rid> ends with the processor architecture. e.g. fedora-x64.
-                    string assemblyDirectory = Path.GetDirectoryName(typeof(NativeMethods).Assembly.Location);
+                    string assemblyDirectory = Path.GetDirectoryName(AppContext.BaseDirectory);
                     string processorArchitecture = RuntimeInformation.ProcessArchitecture.ToString().ToLowerInvariant();
                     string runtimesDirectory = Path.Combine(assemblyDirectory, "runtimes");
 

LibGit2Sharp/Core/Platform.cs

@@ -58,7 +58,11 @@ public static string GetNativeLibraryExtension()
         /// Returns true if the runtime is Mono.
         /// </summary>
         public static bool IsRunningOnMono()
+#if NETFRAMEWORK
             => Type.GetType("Mono.Runtime") != null;
+#else
+            => false;
+#endif
 
         /// <summary>
         /// Returns true if the runtime is .NET Framework.

LibGit2Sharp/LibGit2Sharp.csproj

@@ -23,6 +23,10 @@
     <MinVerBuildMetadata Condition="'$(libgit2_hash)' != ''">libgit2-$(libgit2_hash.Substring(0,7))</MinVerBuildMetadata>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(TargetFramework)' == 'net6.0'">
+    <IsTrimmable>true</IsTrimmable>
+  </PropertyGroup>
+
   <ItemGroup>
     <None Include="..\square-logo.png" Pack="true" PackagePath="" Visible="false" />
     <None Include="..\README.md" Pack="true" PackagePath="App_Readme/" Visible="false" />

LibGit2Sharp/ReferenceWrapper.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using LibGit2Sharp.Core;
 
@@ -10,7 +11,11 @@ namespace LibGit2Sharp
     /// </summary>
     /// <typeparam name="TObject">The type of the referenced Git object.</typeparam>
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
+#if NET
+    public abstract class ReferenceWrapper<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] TObject> : IEquatable<ReferenceWrapper<TObject>>, IBelongToARepository where TObject : GitObject
+#else
     public abstract class ReferenceWrapper<TObject> : IEquatable<ReferenceWrapper<TObject>>, IBelongToARepository where TObject : GitObject
+#endif
     {
         /// <summary>
         /// The repository.

TrimmingTestApp/Program.cs

@@ -0,0 +1,3 @@
+using LibGit2Sharp;
+
+_ = new Repository();

TrimmingTestApp/TrimmingTestApp.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <OutputType>Exe</OutputType>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <PublishTrimmed>true</PublishTrimmed>
+    <PublishSingleFile>true</PublishSingleFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\LibGit2Sharp\LibGit2Sharp.csproj" />
+    <TrimmerRootAssembly Include="LibGit2Sharp" />
+  </ItemGroup>
+
+</Project>