update git module (#2037)

vendor/code.gitea.io/git/commit.go

@@ -235,6 +235,9 @@ func (c *Commit) GetSubModules() (*ObjectCache, error) {
 
 	entry, err := c.GetTreeEntryByPath(".gitmodules")
 	if err != nil {
+		if _, ok := err.(ErrNotExist); ok {
+			return nil, nil
+		}
 		return nil, err
 	}
 	rd, err := entry.Blob().Data()
@@ -273,9 +276,11 @@ func (c *Commit) GetSubModule(entryname string) (*SubModule, error) {
 		return nil, err
 	}
 
-	module, has := modules.Get(entryname)
-	if has {
-		return module.(*SubModule), nil
+	if modules != nil {
+		module, has := modules.Get(entryname)
+		if has {
+			return module.(*SubModule), nil
+		}
 	}
 	return nil, nil
 }

vendor/code.gitea.io/git/tree_entry.go

@@ -264,7 +264,9 @@ func getNextCommitInfos(state *getCommitInfoState) error {
 					return fmt.Errorf("Unquote: %v", err)
 				}
 			}
-			state.update(entryPath)
+			if err = state.update(entryPath); err != nil {
+				return err
+			}
 		}
 		i++ // skip blank line
 		if len(state.entries) == len(state.commits) {