refactor(nixos): simplify navidrome options

configs/nixos/guests/navidrome.nix

@@ -4,9 +4,11 @@
   ...
 }:
 let
-  cfg = config.guests.navidrome;
+  dataDir = "/var/lib/navidrome";
+  musicDir = "/music";
   envFile = "/run/secrets/navidrome.env";
-  hasLastfmSecrets = cfg.lastfmApiKeySecret != null && cfg.lastfmSecretSecret != null;
+  lastfmApiKeySecret = "services/navidrome/lastfm/api-key";
+  lastfmSecretSecret = "services/navidrome/lastfm/secret";
   hostSecrets = ../secrets + "/${config.networking.hostName}.yaml";
 in
 {
@@ -15,105 +17,50 @@ in
       type = lib.types.nullOr lib.types.str;
       default = null;
       example = "/srv/navidrome";
-      description = "Host path bind-mounted as Navidrome's state directory.";
+      description = "Host path mounted as Navidrome's data folder.";
     };
 
     musicPath = lib.mkOption {
       type = lib.types.nullOr lib.types.str;
       default = null;
       example = "/srv/music";
-      description = "Host path bind-mounted as Navidrome's music directory.";
-    };
-
-    dataDir = lib.mkOption {
-      type = lib.types.str;
-      default = "/var/lib/navidrome";
-      description = "Guest path where Navidrome stores state.";
-    };
-
-    musicDir = lib.mkOption {
-      type = lib.types.str;
-      default = "/music";
-      description = "Guest path where Navidrome reads the music library.";
-    };
-
-    port = lib.mkOption {
-      type = lib.types.port;
-      default = 4533;
-      description = "Port Navidrome listens on.";
-    };
-
-    enableSharing = lib.mkOption {
-      type = lib.types.bool;
-      default = true;
-      description = "Enables Navidrome sharing support.";
-    };
-
-    settings = lib.mkOption {
-      type = lib.types.attrs;
-      default = { };
-      description = "Additional non-secret Navidrome settings.";
-    };
-
-    lastfmApiKeySecret = lib.mkOption {
-      type = lib.types.nullOr lib.types.str;
-      default = "services/navidrome/lastfm/api-key";
-      description = "SOPS secret name containing the Navidrome Last.fm API key.";
-    };
-
-    lastfmSecretSecret = lib.mkOption {
-      type = lib.types.nullOr lib.types.str;
-      default = "services/navidrome/lastfm/secret";
-      description = "SOPS secret name containing the Navidrome Last.fm secret.";
+      description = "Host path mounted as Navidrome's music library.";
     };
   };
 
-  config = lib.mkIf cfg.enable {
+  config = lib.mkIf config.guests.navidrome.enable {
     assertions = [
       {
-        assertion = cfg.dataPath != null;
-        message = "guests.navidrome.dataPath must point at the host directory that stores Navidrome state.";
+        assertion = config.guests.navidrome.dataPath != null;
+        message = "guests.navidrome.dataPath must point at the host directory that stores Navidrome data.";
       }
       {
-        assertion = cfg.musicPath != null;
+        assertion = config.guests.navidrome.musicPath != null;
         message = "guests.navidrome.musicPath must point at the host directory that stores the music library.";
       }
     ];
 
     guests.navidrome = {
-      interior.modules.services.navidrome = {
-        enable = true;
-        inherit (cfg)
-          dataDir
-          musicDir
-          port
-          enableSharing
-          settings
-          ;
-        environmentFile = if hasLastfmSecrets then envFile else null;
-      };
+      interior.modules.services.navidrome.enable = true;
 
-      mounts =
-        {
-          ${cfg.dataDir} = {
-            directory = cfg.dataPath;
-            owner = config.registry."stable-uid".${config.networking.hostName}.navidrome;
-            group = "storage";
-            mode = "2770";
-          };
-          ${cfg.musicDir} = {
-            directory = cfg.musicPath;
-            owner = "root";
-            group = "storage";
-            mode = "2770";
-          };
-        }
-        // lib.optionalAttrs hasLastfmSecrets {
-          ${envFile} = {
-            file = config.sops.templates."navidrome.env".path;
-            readOnly = true;
-          };
+      mounts = {
+        ${dataDir} = {
+          directory = config.guests.navidrome.dataPath;
+          owner = config.registry."stable-uid".${config.networking.hostName}.navidrome;
+          group = "storage";
+          mode = "2770";
         };
+        ${musicDir} = {
+          directory = config.guests.navidrome.musicPath;
+          owner = "root";
+          group = "storage";
+          mode = "2770";
+        };
+        ${envFile} = {
+          file = config.sops.templates."navidrome.env".path;
+          readOnly = true;
+        };
+      };
 
       limits = {
         memory = lib.mkDefault "2G";
@@ -122,18 +69,18 @@ in
       };
     };
 
-    sops.secrets = lib.optionalAttrs hasLastfmSecrets {
-      ${cfg.lastfmApiKeySecret}.sopsFile = hostSecrets;
-      ${cfg.lastfmSecretSecret}.sopsFile = hostSecrets;
+    sops.secrets = {
+      ${lastfmApiKeySecret}.sopsFile = hostSecrets;
+      ${lastfmSecretSecret}.sopsFile = hostSecrets;
     };
 
-    sops.templates."navidrome.env" = lib.mkIf hasLastfmSecrets {
+    sops.templates."navidrome.env" = {
       owner = "root";
       group = "storage";
       mode = "0440";
       content = ''
-        ND_LASTFM_APIKEY=${config.sops.placeholder.${cfg.lastfmApiKeySecret}}
-        ND_LASTFM_SECRET=${config.sops.placeholder.${cfg.lastfmSecretSecret}}
+        ND_LASTFM_APIKEY=${config.sops.placeholder.${lastfmApiKeySecret}}
+        ND_LASTFM_SECRET=${config.sops.placeholder.${lastfmSecretSecret}}
       '';
     };
   };