add credentials option support

meinantrag.py

@@ -36,6 +36,22 @@ logger = logging.getLogger(__name__)
 SITE_BASE_URL = os.environ.get("MEINANTRAG_BASE_URL", "http://localhost:8000")
 
 
+def resolve_env_value(value):
+    """
+    Resolve environment variable values that may use file: prefix.
+    If the value starts with 'file:', read the content from the specified path.
+    """
+    if value and value.startswith("file:"):
+        file_path = value[5:]
+        try:
+            with open(file_path, 'r') as f:
+                return f.read().strip()
+        except (IOError, OSError) as e:
+            logger.warning(f"Failed to read credential file {file_path}: {e}")
+            return None
+    return value
+
+
 class BaseTemplateResource:
     """Base class for resources that need template rendering"""
 
@@ -141,8 +157,9 @@ class DatenschutzResource(BaseTemplateResource):
 
 class GenerateAntragResource:
     def __init__(self):
-        # Initialize Gemini API
+        # Initialize Gemini API with file-macro support
-        api_key = os.environ.get("GOOGLE_GEMINI_API_KEY")
+        api_key_raw = os.environ.get("GOOGLE_GEMINI_API_KEY")
+        api_key = resolve_env_value(api_key_raw)
         if api_key:
             genai.configure(api_key=api_key)
             self.model = genai.GenerativeModel("gemini-2.5-pro")

module.nix

@@ -20,12 +20,27 @@ in
         type = lib.types.attrsOf lib.types.str;
         default = { };
         example = {
-          GOOGLE_GEMINI_API_KEY = "your-api-key-here";
           MEINANTRAG_BASE_URL = "https://example.com";
+          GOOGLE_GEMINI_API_KEY = "file:/run/secrets/gemini_api_key";
         };
         description = ''
           Additional environment variables to pass to the MeinAntrag service.
-          For example, set GOOGLE_GEMINI_API_KEY for Gemini API integration.
+          Values starting with "file:" will be read from the specified path.
+          For secrets with systemd LoadCredential, use the credentials option instead.
+        '';
+      };
+
+      credentials = lib.mkOption {
+        type = lib.types.attrsOf lib.types.str;
+        default = { };
+        example = {
+          GOOGLE_GEMINI_API_KEY = "/run/secrets/gemini_api_key";
+        };
+        description = ''
+          Credentials to pass to the MeinAntrag service.
+          Maps environment variable names to file paths containing the secret values.
+          These are loaded via systemd's LoadCredential mechanism.
+          The Python app will automatically read the value from the file.
         '';
       };
 
@@ -64,7 +79,8 @@ in
               "PYTHONPATH=${pkgs.meinantrag}/share/meinantrag:${pkgs.meinantrag.pythonPath}"
               "MEINANTRAG_TEMPLATES_DIR=${pkgs.meinantrag}/share/meinantrag/templates"
               "MEINANTRAG_STATIC_DIR=${pkgs.meinantrag}/share/meinantrag/assets"
-            ] ++ (lib.mapAttrsToList (name: value: "${name}=${value}") cfg.settings);
+            ] ++ (lib.mapAttrsToList (name: value: "${name}=${value}") cfg.settings)
+              ++ (lib.mapAttrsToList (name: _: "${name}=file:/run/credentials/uwsgi.service/${name}") cfg.credentials);
 
             settings = {
               "static-map" = "/static=${pkgs.meinantrag}/share/meinantrag/assets";
@@ -74,6 +90,10 @@ in
       };
     };
 
+    # Load credentials via systemd's LoadCredential mechanism
+    systemd.services.uwsgi.serviceConfig.LoadCredential =
+      lib.mapAttrsToList (key: value: "${key}:${value}") cfg.credentials;
+
     # Ensure meinantrag user and group exist
     users.users.meinantrag = {
       isSystemUser = true;