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go/src/infra/libs/git/objectType.go

Index: go/src/infra/libs/git/objectType.go
diff --git a/go/src/infra/libs/git/objectType.go b/go/src/infra/libs/git/objectType.go
new file mode 100644
index 0000000000000000000000000000000000000000..093239fc766b96e90d7b21d98b87b356aa57d469
--- /dev/null
+++ b/go/src/infra/libs/git/objectType.go
@@ -0,0 +1,57 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package git
+
+import (
+	"fmt"
+)
+
+// Types ///////////////////////////////////////////////////////////////////////
+
+type ObjectType uint8
+
+// Constants ///////////////////////////////////////////////////////////////////
+
+const (
+	UnknownType ObjectType = iota
+	CommitType
+	BlobType
+	TreeType
+	TagType
+)
+
+// Constructors  ///////////////////////////////////////////////////////////////
+
+func MakeObjectType(s string) ObjectType {
+	switch s {
+	case "commit":
+		return CommitType
+	case "blob":
+		return BlobType
+	case "tree":
+		return TreeType
+	case "tag":
+		return TagType
+	default:
+		panic(fmt.Errorf("unknown object type %s", s))
+	}
+}
+
+// Member functions ////////////////////////////////////////////////////////////
+
+func (o ObjectType) String() string {
+	switch o {
+	case CommitType:
+		return "commit"
+	case BlobType:
+		return "blob"
+	case TreeType:
+		return "tree"
+	case TagType:
+		return "tag"
+	default:
+		return "UNKNOWN"
+	}
+}