Add `Retry` button when creating a mirror-repo fails (#26228)

fixed #26156 
* Added a retry button in the frontend (only displayed when the status
is abnormal)
* After clicking Retry, the backend adds the task back to the task queue


![7UJDNM671RI})EA8~~XPL39](https://github.com/go-gitea/gitea/assets/3371163/e088fd63-5dcc-4bc6-8849-7db3086511b7)

![T83F1WL9)VGHR@MB956$VT9](https://github.com/go-gitea/gitea/assets/3371163/744425bb-dde1-4315-be2e-5c99ac3a44d4)

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/services/task/task.go b/services/task/task.go
index 11a47a68bb..db5c1dd3f8 100644
--- a/services/task/task.go
+++ b/services/task/task.go
@@ -126,3 +126,27 @@ func CreateMigrateTask(doer, u *user_model.User, opts base.MigrateOptions) (*adm
 
 	return task, nil
 }
+
+// RetryMigrateTask retry a migrate task
+func RetryMigrateTask(repoID int64) error {
+	migratingTask, err := admin_model.GetMigratingTask(repoID)
+	if err != nil {
+		log.Error("GetMigratingTask: %v", err)
+		return err
+	}
+	if migratingTask.Status == structs.TaskStatusQueued || migratingTask.Status == structs.TaskStatusRunning {
+		return nil
+	}
+
+	// TODO Need to removing the storage/database garbage brought by the failed task
+
+	// Reset task status and messages
+	migratingTask.Status = structs.TaskStatusQueued
+	migratingTask.Message = ""
+	if err = migratingTask.UpdateCols("status", "message"); err != nil {
+		log.Error("task.UpdateCols failed: %v", err)
+		return err
+	}
+
+	return taskQueue.Push(migratingTask)
+}