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go/src/infra/libs/git/object.go

+// 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"
+        "strings"
+)
+
+func ObjectFromRaw(typ ObjectType, data []byte) (InternableObject, error) {
+        return ObjectFromRawWithID(MakeObjectIDForData(typ, data), typ, data)
+}
+
+func ObjectFromRawWithID(id Identifiable, typ ObjectType, data []byte) (InternableObject, error) {
+        switch typ {
+        case BlobType:
+                return NewBlobFromRawWithID(id, data), nil
+        case TreeType:
+                return NewTreeFromRawWithID(id, data)
+        case CommitType:
+                return NewCommitFromRawWithID(id, data)
+        default:
+                return nil, fmt.Errorf("unsupported object type: %s", typ)
+        }
+}
+
+func InternImpl(s GitService, obj InternableObject, intern func(string) (string, error)) (*ObjectID, error) {
+        gotData := false
+        var data string
+        if !obj.Complete() {
+                gotData = true
+                data = obj.RawString()
+        }
+
+        if *obj.ID() == NoID {
+                return nil, fmt.Errorf("%v still has NoID after calling RawString()", obj)
+        }
+        if s.HasObjectID(obj) {
+                return obj.ID(), nil
+        }
+
+        switch obj.Type() {
+        case CommitType, BlobType, TreeType:
+        default:
+                return nil, fmt.Errorf("git.Intern: Unrecognized type %s", obj.Type())
+        }
+        if !gotData {
+                data = obj.RawString()
+        }
+        id_raw, err := intern(data)
+        if err != nil {
+                return nil, err
+        }
+        return MakeObjectIDErr(strings.TrimSpace(id_raw))
+}