系统日志增加时间筛选和清空

shell/preload/sitecustomize.py

@@ -46,11 +46,11 @@ def run():
         if task_before:
             escape_task_before = task_before.replace('"', '\\"').replace("$", "\\$")
             command += f" && eval '{escape_task_before}'"
+            print("执行前置命令\n")
 
         python_command = "PYTHONPATH= python3 -c 'import os, json; print(json.dumps(dict(os.environ)))'"
         command += f" && echo -e '{split_str}' && {python_command}\""
 
-        print("执行前置命令\n")
         res = subprocess.check_output(command, shell=True, encoding="utf-8")
         output, env_str = res.split(split_str)
 
@@ -60,7 +60,8 @@ def run():
             os.environ[key] = value
 
         print(output)
-        print("执行前置命令结束")
+        if task_before:
+            print("执行前置命令结束")
 
     except subprocess.CalledProcessError as error:
         print(f"run task before error: {error}")