Enable loading arm64 libgit2

Author: Alexander Ovchinnikov

LibGit2Sharp.Tests/GlobalSettingsFixture.cs

@@ -22,7 +22,7 @@ public void CanGetMinimumCompiledInFeatures()
         public void CanRetrieveValidVersionString()
         {
             // Version string format is:
-            //      Major.Minor.Patch[-previewTag]+{LibGit2Sharp_abbrev_hash}.libgit2-{libgit2_abbrev_hash} (x86|x64 - features)
+            //      Major.Minor.Patch[-previewTag]+{LibGit2Sharp_abbrev_hash}.libgit2-{libgit2_abbrev_hash} (x86|x64|arm64 - features)
             // Example output:
             //      "0.25.0-preview.52+871d13a67f.libgit2-15e1193 (x86 - Threads, Https)"
 
@@ -31,7 +31,7 @@ public void CanRetrieveValidVersionString()
             // The GlobalSettings.Version returned string should contain :
             //      version: '0.25.0[-previewTag]' LibGit2Sharp version number.
             //      git2SharpHash: '871d13a67f' LibGit2Sharp hash.
-            //      arch: 'x86' or 'x64' libgit2 target.
+            //      arch: 'x86', 'x64' or 'arm64' libgit2 target.
             //      git2Features: 'Threads, Ssh' libgit2 features compiled with.
             string regex = @"^(?<version>\d+\.\d+\.\d+(-[\w\-\.]+)?\+((?<git2SharpHash>[a-f0-9]{10})\.)?libgit2-[a-f0-9]{7}) \((?<arch>\w+) - (?<git2Features>(?:\w*(?:, )*\w+)*)\)$";
 
@@ -40,7 +40,7 @@ public void CanRetrieveValidVersionString()
             Match regexResult = Regex.Match(versionInfo, regex);
 
             Assert.True(regexResult.Success, "The following version string format is enforced:" +
-                                             "Major.Minor.Patch[-previewTag]+{LibGit2Sharp_abbrev_hash}.libgit2-{libgit2_abbrev_hash} (x86|x64 - features). " +
+                                             "Major.Minor.Patch[-previewTag]+{LibGit2Sharp_abbrev_hash}.libgit2-{libgit2_abbrev_hash} (x86|x64|arm64 - features). " +
                                              "But found \"" + versionInfo + "\" instead.");
         }
 

LibGit2Sharp/Core/Platform.cs

@@ -12,7 +12,28 @@ internal enum OperatingSystemType
 
     internal static class Platform
     {
-        public static string ProcessorArchitecture => IntPtr.Size == 8 ? "x64" : "x86";
+        public static string ProcessorArchitecture
+        {
+            get
+            {
+                if (RuntimeInformation.ProcessArchitecture == Architecture.X86)
+                {
+                    return "x86";
+                }
+
+                if (RuntimeInformation.ProcessArchitecture == Architecture.X64)
+                {
+                    return "x64";
+                }
+
+                if (RuntimeInformation.ProcessArchitecture == Architecture.Arm64)
+                {
+                    return "arm64";
+                }
+
+                throw new PlatformNotSupportedException();
+            }
+        }
 
         public static OperatingSystemType OperatingSystem
         {

LibGit2Sharp/GlobalSettings.cs

@@ -159,7 +159,7 @@ public static LogConfiguration LogConfiguration
         /// <summary>
         /// Sets a path for loading native binaries on .NET Framework or .NET Core.
         /// When specified, native library will first be searched under the given path.
-        /// On .NET Framework a subdirectory corresponding to the architecture  ("x86" or "x64") is appended,
+        /// On .NET Framework a subdirectory corresponding to the architecture  ("x86", "x64" or "arm64") is appended,
         /// otherwise the native library is expected to be found in the directory as specified.
         ///
         /// If the library is not found it will be searched in standard search paths:

LibGit2Sharp/LibGit2Sharp.csproj

@@ -34,7 +34,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Mendix.LibGit2Sharp.NativeBinaries" Version="[1.110.1]" PrivateAssets="none" />
+    <PackageReference Include="Mendix.LibGit2Sharp.NativeBinaries" Version="[1.110.10]" PrivateAssets="none" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="all" />
     <PackageReference Include="Nerdbank.GitVersioning" Version="3.0.50" PrivateAssets="all" />
   </ItemGroup>

LibGit2Sharp/Version.cs

@@ -55,7 +55,7 @@ private string RetrieveAbbrevShaFrom(string sha)
         /// </summary>
         /// <para>
         ///   The format of the version number is as follows:
-        ///   <para>Major.Minor.Patch[-previewTag]+{LibGit2Sharp_abbrev_hash}.libgit2-{libgit2_abbrev_hash} (x86|x64 - features)</para>
+        ///   <para>Major.Minor.Patch[-previewTag]+{LibGit2Sharp_abbrev_hash}.libgit2-{libgit2_abbrev_hash} (x86|x64|arm64 - features)</para>
         /// </para>
         /// <returns></returns>
         public override string ToString()