Update zero_trigger.py to load configuration file from home directory…

… if it exists, otherwise create a symlink and load from specified file

services/zero_trigger.py

@@ -689,10 +689,21 @@ def unix_time(self):
             action.required = True
         args = parser.parse_args()
     else:
-        with open(args.configuration_file, "r") as fp:
-            print("Load configuration file " + args.configuration_file)
-            cfg = json.load(fp)
-            args = types.SimpleNamespace(**(vars(args) | cfg))
+        from pathlib import Path
+        os.makedirs(Path.home() / ".noisesensor", exist_ok=True)
+        home_config_path = Path.home() / ".noisesensor" / "zerotrigger_config.json"
+        if home_config_path.exists():
+            print("Load configuration file " + str(home_config_path))
+            with open(home_config_path, "r") as fp:
+                cfg = json.load(fp)
+                args = types.SimpleNamespace(**(vars(args) | cfg))
+        else:
+            config_file_path = Path(args.configuration_file)
+            os.symlink(config_file_path.absolute(), home_config_path)
+            with open(config_file_path, "r") as fp:
+                print("Load configuration file " + args.configuration_file)
+                cfg = json.load(fp)
+                args = types.SimpleNamespace(**(vars(args) | cfg))
     print("Configuration:\n" + json.dumps(vars(args),
                                           sort_keys=False, indent=2))
     trigger = TriggerProcessor(args)