First attempt at converting "sig" to "activity" for v3

core/config.py

@@ -19,6 +19,18 @@ with open("config.yml") as f:
     config = yaml.safe_load(f)
 logger.info("Loaded config.")
 
+# Warn about config keys that were renamed from "sig" to "activity" in Spothole v3, as these will otherwise be silently
+# ignored.
+if "sig_ref_data_providers" in config:
+    logger.warning(
+        'Your config file contains "sig_ref_data_providers", which was renamed to "activity_ref_data_providers" in Spothole v3. Please update your config.yml, otherwise no activity reference data will be loaded.'
+    )
+for _entry in config.get("spot_providers", []):
+    if "sig" in _entry or "sig_ref_prefix" in _entry:
+        logger.warning(
+            f'Your config file contains "sig" or "sig_ref_prefix" for the {_entry.get("class")} spot provider. These were renamed to "activity" and "activity_ref_prefix" in Spothole v3. Please update your config.yml.'
+        )
+
 BASE_URL = config.get("base_url", "http://localhost:8080")
 MAX_SPOT_AGE = config.get("max_spot_age_sec", 3600)
 MAX_ALERT_AGE = config.get("max_alert_age_sec", 604800)