Implement git_index_remove_directory in index wrapper

Author: ezwiebel

index.go

@@ -278,6 +278,22 @@ func (v *Index) RemoveByPath(path string) error {
 	return nil
 }
 
+// RemoveDirectory removes all entries from the index under a given directory.
+func (v *Index) RemoveDirectory(dir string, stage int) error {
+	cstr := C.CString(dir)
+	defer C.free(unsafe.Pointer(cstr))
+
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	ret := C.git_index_remove_directory(v.ptr, cstr, C.int(stage))
+	if ret < 0 {
+		return MakeGitError(ret)
+	}
+
+	return nil
+}
+
 func (v *Index) WriteTreeTo(repo *Repository) (*Oid, error) {
 	oid := new(Oid)
 

index_test.go

@@ -105,6 +105,46 @@ func TestIndexAddAndWriteTreeTo(t *testing.T) {
 	}
 }
 
+func TestIndexRemoveDirectory(t *testing.T) {
+	repo := createTestRepo(t)
+	defer cleanupTestRepo(t, repo)
+
+	odb, err := repo.Odb()
+	checkFatal(t, err)
+
+	blobID, err := odb.Write([]byte("fou\n"), ObjectBlob)
+	checkFatal(t, err)
+
+	idx, err := NewIndex()
+	checkFatal(t, err)
+
+	entryCount := idx.EntryCount()
+	if entryCount != 0 {
+		t.Fatal("Index should count 0 entry")
+	}
+
+	entry := IndexEntry{
+		Path: "path/to/LISEZ_MOI",
+		Id:   blobID,
+		Mode: FilemodeBlob,
+	}
+
+	err = idx.Add(&entry)
+	checkFatal(t, err)
+
+	entryCount = idx.EntryCount()
+	if entryCount != 1 {
+		t.Fatal("Index should count 1 entry")
+	}
+
+	err = idx.RemoveDirectory("path", 0)
+
+	entryCount = idx.EntryCount()
+	if entryCount != 0 {
+		t.Fatal("Index should count 0 entry")
+	}
+}
+
 func TestIndexAddAllNoCallback(t *testing.T) {
 	repo := createTestRepo(t)
 	defer cleanupTestRepo(t, repo)