tools: cron: Deep copy a config loaded as module

A .py file loaded as a module is cached until it is explicitly removed
from sys.modules. So subsequent attempts to load the file only return
a reference to the existing module-dictionary. So we need to deep-copy
a config.py to prevent overwriting its original values and reuse it
e.g. in subsequent PR jobs.

autoptsclient_bot.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-
+import copy
 #
 # auto-pts - The Bluetooth PTS Automation Framework
 #
@@ -59,7 +59,7 @@ def import_bot_projects():
         return None, config_path
 
     module = load_module_from_path(config_path)
-    return getattr(module, "BotProjects", None), config_path
+    return copy.deepcopy(getattr(module, "BotProjects", None)), config_path
 
 
 def import_bot_module(project):

tools/cron/autopts_bisect.py

@@ -24,7 +24,7 @@
 
 If last_bad_commit is empty, then takes HEAD commit.
 """
-
+import copy
 import importlib
 import os
 import re
@@ -110,7 +110,7 @@ def load_cfg(cfg):
         raise Exception('{} does not exists!'.format(cfg_path))
 
     mod = load_module_from_path(cfg_path)
-    return mod.BotProjects[0], cfg_path
+    return copy.deepcopy(mod.BotProjects[0]), cfg_path
 
 
 def bisect(cfg, test_case, good_commit, bad_commit=''):

tools/cron/autopts_cron.py

@@ -381,7 +381,7 @@ def sigint_handler(sig, frame):
     args = CliParser().parse_args()
 
     global cron_config
-    cron_config = load_module_from_path(args.config_path)
+    cron_config = copy.deepcopy(load_module_from_path(args.config_path))
 
     if not cron_config:
         sys.exit(f'Could not load cron config from path {args.config_path}')

tools/cron/common.py

@@ -24,6 +24,7 @@
 $ eval `ssh-agent`
 $ ssh-add path/to/id_rsa
 """
+import copy
 import logging
 import os
 import re
@@ -233,7 +234,7 @@ def load_config(cfg):
     if not mod:
         raise Exception(f'Could not load the config {cfg}')
 
-    return mod.BotProjects[0]
+    return copy.deepcopy(mod.BotProjects[0])
 
 
 def find_workspace_in_tree(tree_path, workspace, init_depth=4):