Enforce loading of fetchers

personal_data/fetchers/__init__.py

@@ -21,11 +21,16 @@ def get_modules(backend_dir: Path) -> Iterator[str]:
             if name != '__init__':
                 yield name
 
+FETCHER_MODULES_LOADED = False
+
 
 def load_fetcher_modules() -> None:
+    global FETCHER_MODULES_LOADED
+    if not FETCHER_MODULES_LOADED:
         backend_dir = Path(__name__.replace(r'.', '/'))
         for module in get_modules(backend_dir):
             load_backend(module)
+    FETCHER_MODULES_LOADED = True
 
 
 load_fetcher_modules()

personal_data/main.py

@@ -7,7 +7,7 @@ from pathlib import Path
 import requests
 import requests_cache
 
-from . import data, notification, util
+from . import data, notification, util, fetchers
 
 logger = logging.getLogger(__name__)
 
@@ -73,6 +73,7 @@ def get_session(
 
 
 def available_scrapers() -> list[type[data.Scraper]]:
+    fetchers.load_fetcher_modules()
     subclasses = []
     class_queue = [data.Scraper]
     while class_queue:

test/test_init.py

@@ -0,0 +1,3 @@
+def test_init():
+    import personal_data
+    assert personal_data.__version__ is not None