init: Allow specifying secrets via env vars

feedleware/__init__.py

@@ -21,23 +21,38 @@ def create_app():
     logging.basicConfig(level=level)
 
     config_path = environ.get("FEEDLEWARE_CONFIG")
+    config = {}
 
-    if not config_path:
-        print(
-            "Please set the FEEDLEWARE_CONFIG environment variable",
-            file=sys.stderr,
-        )
-        sys.exit(1)
+    if config_path:
+        print(f"Reading config from {config_path}")
+        config = configparser.ConfigParser()
+        config.read(config_path)
+
+    if "twitch" not in config:
+        config["twitch"] = {}
+
+    if (client_id := environ.get("FEEDLEWARE_TWITCH_CLIENT_ID")):
+        config["twitch"]["client_id"] = client_id
+
+    if (secret := environ.get("FEEDLEWARE_TWITCH_SECRET")):
+        config["twitch"]["secret"] = secret
+
+    if "youtube" not in config:
+        config["youtube"] = {}
+
+    if (key := environ.get("FEEDLEWARE_YOUTUBE_KEY")):
+        config["youtube"]["key"] = key
+
+    if "openalex" not in config:
+        config["openalex"] = {}
+
+    if (email := environ.get("FEEDLEWARE_OPENALEX_EMAIL")):
+        config["openalex"]["email"] = email
 
-    config = configparser.ConfigParser()
-    config.read(config_path)
     app = Flask(__name__)
 
-    for section in config.sections():
-        if section in blueprints:
-            blueprint = blueprints[section].create_blueprint(config[section])
-            app.register_blueprint(blueprint, url_prefix="/" + section)
-        else:
-            logger.warning("Unknown service '%s'", section)
+    for section in blueprints.keys():
+        blueprint = blueprints[section].create_blueprint(config[section])
+        app.register_blueprint(blueprint, url_prefix="/" + section)
 
     return app