Updated so it now can either read from a path or environment variable

secret_manager/credentials_loader.py

@@ -1,9 +1,35 @@
-from simple_logger_handler import setup_logger
+import logging
 import os
 from typing import Set
 
-logger = setup_logger(__name__)
+logger = logging.getLogger(__name__)
 
+class MissingCredentialError(RuntimeError):
+	"""Neither the environment variable nor the secret file provided a value."""
+
+def get_secret(env_var: str, path: str | None = None) -> str:
+	"""Resolve a secret from an environment variable, falling back to a file.
+
+	Resolution order:
+		1. The environment variable ``env_var`` (if set and non-empty).
+		2. The file at ``path`` (if given and it exists).
+
+	Raises:
+		MissingCredentialError: If neither source provides a value.
+	"""
+	value = os.getenv(env_var, "").strip()
+	if value:
+		logger.debug(f"Loaded secret from environment variable {env_var}")
+		return value
+
+	if path:
+		try:
+			return return_credentials(path)
+		except FileNotFoundError:
+			pass
+
+	sources = f"environment variable {env_var}" + (f" or file {path}" if path else "")
+	raise MissingCredentialError(f"No credential found: set {sources}")
 
 def return_credentials(path: str) -> str:
 	"""Read and return credentials from a file."""