feature: Add support for WSL git on windows

Author: roguesaloon

src/Commands/Command.cs

@@ -167,6 +167,19 @@ private ProcessStartInfo CreateGitStartInfo()
                 start.Environment.Add("LANG", "C");
                 start.Environment.Add("LC_ALL", "C");
             }
+            else if (OperatingSystem.IsWindows())
+            {
+                // Use WSL git for WSL paths on Windows
+                var wsl = new Models.WSL() { Path = WorkingDirectory };
+                if (wsl.IsWSLPath())
+                {
+                    start.FileName = "wsl";
+                    start.Arguments = $"git {start.Arguments}";
+
+                    wsl.SetEnvironmentForProcess(start);
+                    selfExecFile = start.Environment["SSH_ASKPASS"];
+                }
+            }
 
             // Force using this app as git editor.
             switch (Editor)

src/Models/WSL.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Diagnostics;
+using System.Text;
+
+namespace SourceGit.Models
+{
+    public class WSL
+    {
+        public string Path { get; set; } = "";
+
+        public bool IsWSLPath()
+        {
+            return OperatingSystem.IsWindows() && !string.IsNullOrEmpty(Path) &&
+                (Path.StartsWith("//wsl.localhost/", StringComparison.OrdinalIgnoreCase) ||
+                Path.StartsWith("//wsl$/", StringComparison.OrdinalIgnoreCase));
+        }
+
+        public void SetEnvironmentForProcess(ProcessStartInfo start)
+        {
+            start.Environment.Add("LANG", "C");
+            start.Environment.Add("LC_ALL", "C");
+
+            if (start.Environment.TryGetValue("SSH_ASKPASS", out var askPassPath) && !string.IsNullOrEmpty(askPassPath) && System.IO.Path.IsPathRooted(askPassPath))
+            {
+                // Convert Windows path to WSL path
+                var driveLetter = askPassPath[0].ToString();
+                start.Environment["SSH_ASKPASS"] = askPassPath
+                    .Replace($"{driveLetter}:\\", $"/mnt/{driveLetter.ToLowerInvariant()}/")
+                    .Replace('\\', '/');
+            }
+
+            var wslEnvirionment = new[] { "SSH_ASKPASS", "SSH_ASKPASS_REQUIRE", "SOURCEGIT_LAUNCH_AS_ASKPASS", "GIT_SSH_COMMAND", "LANG", "LC_ALL" };
+            var wslEnvBuilder = new StringBuilder();
+
+            foreach (string env in wslEnvirionment)
+            {
+                if (start.Environment.ContainsKey(env))
+                    wslEnvBuilder.Append($"{env}:");
+            }
+
+            // Forward environment variables for WSL
+            start.Environment.Add("WSLENV", wslEnvBuilder.ToString().TrimEnd(':'));
+        }
+    }
+}

src/ViewModels/Repository.cs

@@ -869,7 +869,15 @@ public void StartSearchCommits()
 
         public void SetWatcherEnabled(bool enabled)
         {
-            _watcher?.SetEnabled(enabled);
+            var wsl = new Models.WSL() { Path = FullPath };
+            if (wsl.IsWSLPath())
+            {
+                _watcher?.MarkBranchDirtyManually();
+            }
+            else
+            {
+                _watcher?.SetEnabled(enabled);
+            }
         }
 
         public void MarkBranchesDirtyManually()