enhance: try to get stopped at revision info from .git/rebase-merge/head

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/ViewModels/InProgressContexts.cs

@@ -107,19 +107,25 @@ public RebaseInProgress(Repository repo) : base(repo.FullPath, "rebase")
         {
             _gitDir = repo.GitDir;
 
+            HeadName = File.ReadAllText(Path.Combine(repo.GitDir, "rebase-merge", "head-name")).Trim();
+            if (HeadName.StartsWith("refs/heads/"))
+                HeadName = HeadName.Substring(11);
+
             var stoppedSHAPath = Path.Combine(repo.GitDir, "rebase-merge", "stopped-sha");
             if (File.Exists(stoppedSHAPath))
             {
                 var stoppedSHA = File.ReadAllText(stoppedSHAPath).Trim();
                 StoppedAt = new Commands.QuerySingleCommit(repo.FullPath, stoppedSHA).Result() ?? new Models.Commit() { SHA = stoppedSHA };
             }
+            else
+            {
+                var b = repo.Branches.Find(x => x.IsLocal && x.Name == HeadName);
+                if (b != null && !string.IsNullOrEmpty(b.Head))
+                    StoppedAt = new Commands.QuerySingleCommit(repo.FullPath, b.Head).Result() ?? new Models.Commit() { SHA = b.Head };
+            }
 
             var ontoSHA = File.ReadAllText(Path.Combine(repo.GitDir, "rebase-merge", "onto")).Trim();
             Onto = new Commands.QuerySingleCommit(repo.FullPath, ontoSHA).Result() ?? new Models.Commit() { SHA = ontoSHA };
-
-            HeadName = File.ReadAllText(Path.Combine(repo.GitDir, "rebase-merge", "head-name")).Trim();
-            if (HeadName.StartsWith("refs/heads/"))
-                HeadName = HeadName.Substring(11);
         }
 
         public override bool Continue()