update Pipeline

csst_common/pipeline.py

@@ -11,9 +11,9 @@ Modified-History:
     2023-12-15, Bo Zhang, add module header
 """
 import json
+import subprocess
 import os
 import shutil
-import subprocess
 import traceback
 import warnings
 from typing import Callable, NamedTuple, Optional, Any
@@ -70,6 +70,7 @@ class Pipeline:
         filter_warnings: bool = False,
         dfs: bool = True,
         ccds: bool = False,
+        clean_output_before_run: bool = True,
         **kwargs: Any,
     ):
         # get pipeline information from env vars
@@ -85,6 +86,9 @@ class Pipeline:
         self.ccds_root = ccds_root
         self.ccds_cache = ccds_cache
 
+        if clean_output_before_run:
+            self.clean_output()
+
         # additional parameters
         self.kwargs = kwargs