index.go

@@ -48,6 +48,20 @@ func (v *Index) AddByPath(path string) error {
 	return nil
 }
 
+func (v *Index) WriteTreeTo(repo *Repository) (*Oid, error) {
+	oid := new(Oid)
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_index_write_tree_to(oid.toC(), v.ptr, repo.ptr)
+	if ret < 0 {
+		return nil, MakeGitError(ret)
+	}
+
+	return oid, nil
+}
+
 func (v *Index) WriteTree() (*Oid, error) {
 	oid := new(Oid)
 
@@ -62,7 +76,7 @@ func (v *Index) WriteTree() (*Oid, error) {
 	return oid, nil
 }
 
-func (v *Index) Write() (error) {
+func (v *Index) Write() error {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 

index_test.go

@@ -22,6 +22,25 @@ func TestCreateRepoAndStage(t *testing.T) {
 	}
 }
 
+func TestIndexWriteTreeTo(t *testing.T) {
+	repo := createTestRepo(t)
+	defer os.RemoveAll(repo.Workdir())
+
+	repo2 := createTestRepo(t)
+	defer os.RemoveAll(repo.Workdir())
+
+	idx, err := repo.Index()
+	checkFatal(t, err)
+	err = idx.AddByPath("README")
+	checkFatal(t, err)
+	treeId, err := idx.WriteTreeTo(repo2)
+	checkFatal(t, err)
+
+	if treeId.String() != "b7119b11e8ef7a1a5a34d3ac87f5b075228ac81e" {
+		t.Fatalf("%v", treeId.String())
+	}
+}
+
 func checkFatal(t *testing.T, err error) {
 	if err == nil {
 		return