Merge pull request #27 from UiPath/fix/schannel_config

select schannel ssl backend if configured in .gitconfig globally

Author: andrei-balint

LibGit2Sharp/Core/ConfigurationFileReader.cs

@@ -0,0 +1,23 @@
+#nullable enable
+using System.Runtime.InteropServices;
+using System.Text;
+
+internal sealed class ConfigurationFileReader
+{
+    private readonly string _path;
+
+    [DllImport("kernel32", CharSet = CharSet.Unicode)]
+    private static extern int GetPrivateProfileString(string section, string key, string defaultValue, StringBuilder result, int size, string filePath);
+
+    public ConfigurationFileReader(string path)
+    {
+        _path = path;
+    }
+
+    public string Read(string section, string key)
+    {
+        var result = new StringBuilder(255);
+        GetPrivateProfileString(section, key, "", result, 255, _path);
+        return result.ToString();
+    }
+}

LibGit2Sharp/Core/NativeMethods.cs

@@ -92,7 +92,7 @@ private static IntPtr ResolveDll(string libraryName, Assembly assembly, DllImpor
 
             if (libraryName == libgit2)
             {
-                if (Environment.GetEnvironmentVariable("UIPATH_STUDIO_GIT_USE_SCHANNEL") == "1")
+                if (Environment.GetEnvironmentVariable("UIPATH_STUDIO_GIT_USE_SCHANNEL") == "1" || IsSchannelSelectedInGitConfig())
                 {
                     Trace.TraceInformation("Using git with schannel");
                     libraryName = libraryName + "_schannel";
@@ -140,6 +140,33 @@ private static IntPtr ResolveDll(string libraryName, Assembly assembly, DllImpor
 
             return handle;
         }
+
+        private static bool IsSchannelSelectedInGitConfig()
+        {
+            string globalConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".gitconfig");
+            string systemConfigPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.System), "gitconfig");
+            string[] probingPaths = [globalConfigPath, systemConfigPath];
+            foreach(var path in probingPaths)
+            {
+                try
+                {
+                    if (File.Exists(path))
+                    {
+                        var value = new ConfigurationFileReader(path).Read("http", "sslBackend");
+                        if (!string.IsNullOrEmpty(value))
+                        {
+                            return value == "schannel";
+                        }
+                    }
+                }
+                catch(Exception ex)
+                {
+                    Trace.TraceError("Error when reading " + path + " " + ex);
+                }
+            }
+
+            return false;
+        }
 #endif
 
         public const int RTLD_NOW = 0x002;

LibGit2Sharp/LibGit2Sharp.csproj

@@ -20,6 +20,7 @@
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <MinVerDefaultPreReleaseIdentifiers>preview.0</MinVerDefaultPreReleaseIdentifiers>
     <MinVerBuildMetadata Condition="'$(libgit2_hash)' != ''">libgit2-$(libgit2_hash.Substring(0,7))</MinVerBuildMetadata>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>