enhance: do not show Initialize Repository popup for bare repositories (#891)

Author: love-linger

src/Commands/IsBareRepository.cs

@@ -0,0 +1,24 @@
+using System.IO;
+
+namespace SourceGit.Commands
+{
+    public class IsBareRepository : Command
+    {
+        public IsBareRepository(string path)
+        {
+            WorkingDirectory = path;
+            Args = "rev-parse --is-bare-repository";
+        }
+
+        public bool Result()
+        {
+            if (!Directory.Exists(Path.Combine(WorkingDirectory, "refs")) ||
+                !Directory.Exists(Path.Combine(WorkingDirectory, "objects")) ||
+                !File.Exists(Path.Combine(WorkingDirectory, "HEAD")))
+                return false;
+
+            var rs = ReadToEnd();
+            return rs.IsSuccess && rs.StdOut.Trim() == "true";
+        }
+    }
+}

src/Views/Welcome.axaml.cs

@@ -300,6 +300,13 @@ private void OpenOrInitRepository(string path, ViewModels.RepositoryNode parent
                     return;
             }
 
+            var isBare = new Commands.IsBareRepository(path).Result();
+            if (isBare)
+            {
+                App.RaiseException(string.Empty, $"'{path}' is a bare repository, which is not supported by SourceGit!");
+                return;
+            }
+
             var test = new Commands.QueryRepositoryRootPath(path).ReadToEnd();
             if (!test.IsSuccess || string.IsNullOrEmpty(test.StdOut))
             {