git workspace逻辑

internal/workspace/workspace_service.go

@@ -228,6 +228,21 @@ func (s *workspaceService) Sync(ctx context.Context, c Caller, wsID uuid.UUID) (
 	}
 	// 状态回写与请求生命周期解耦：客户端断开/请求超时也要能写回状态，避免永久卡 syncing。
 	writeCtx := context.WithoutCancel(ctx)
+	// main 仓库目录缺失（历史 clone 从未成功 / 数据卷丢失）时 fetch 注定失败，
+	// 转为重新 clone 自愈：状态切回 cloning 并调度 CloneRunner，由其落 idle/error。
+	if _, statErr := os.Stat(ws.MainPath); errors.Is(statErr, os.ErrNotExist) {
+		if s.clones == nil {
+			_, _ = s.repo.UpdateWorkspaceSyncStatus(writeCtx, wsID, SyncStatusError, ws.LastSyncedAt, "main repo missing on disk; clone scheduler unavailable")
+			return nil, errs.New(errs.CodeGitCmdFailed, "main repo missing on disk")
+		}
+		updated, err := s.repo.UpdateWorkspaceSyncStatus(writeCtx, wsID, SyncStatusCloning, ws.LastSyncedAt, "")
+		if err != nil {
+			return nil, err
+		}
+		s.audit(writeCtx, &c.UserID, "workspace.reclone", "workspace", wsID.String(), map[string]any{"reason": "main path missing"})
+		s.clones.Schedule(wsID)
+		return updated, nil
+	}
 	fetchCtx, cancel := context.WithTimeout(ctx, s.fetchTimout)
 	defer cancel()
 	if fetchErr := s.gitr.Fetch(fetchCtx, ws.MainPath, cred); fetchErr != nil {