git: worktree_commit, Fix amend commit to apply changes. Fixes #1024

1 files changed, 17 insertions, 16 deletions

diff --git a/worktree_commit.go b/worktree_commit.go
index 7945af1..f62054b 100644
--- a/worktree_commit.go
+++ b/worktree_commit.go
@@ -45,29 +45,30 @@ func (w *Worktree) Commit(msg string, opts *CommitOptions) (plumbing.Hash, error
 		if err != nil {
 			return plumbing.ZeroHash, err
 		}
-
-		t, err := w.r.getTreeFromCommitHash(head.Hash())
+		headCommit, err := w.r.CommitObject(head.Hash())
 		if err != nil {
 			return plumbing.ZeroHash, err
 		}
 
-		treeHash = t.Hash
-		opts.Parents = []plumbing.Hash{head.Hash()}
-	} else {
-		idx, err := w.r.Storer.Index()
-		if err != nil {
-			return plumbing.ZeroHash, err
+		opts.Parents = nil
+		if len(headCommit.ParentHashes) != 0 {
+			opts.Parents = []plumbing.Hash{headCommit.ParentHashes[0]}
 		}
+	}
 
-		h := &buildTreeHelper{
-			fs: w.Filesystem,
-			s:  w.r.Storer,
-		}
+	idx, err := w.r.Storer.Index()
+	if err != nil {
+		return plumbing.ZeroHash, err
+	}
 
-		treeHash, err = h.BuildTree(idx, opts)
-		if err != nil {
-			return plumbing.ZeroHash, err
-		}
+	h := &buildTreeHelper{
+		fs: w.Filesystem,
+		s:  w.r.Storer,
+	}
+
+	treeHash, err = h.BuildTree(idx, opts)
+	if err != nil {
+		return plumbing.ZeroHash, err
 	}
 
 	commit, err := w.buildCommitObject(msg, opts, treeHash)