refactor: move syncthing configs out of flake file

flake.nix

@@ -91,15 +91,9 @@
     util = import ./util {inherit inputs;};
     forEachPkgs = util.forEachPkgs;
 
-    mkNixosInstaller = util.mkNixosInstaller;
     mkNixosSystem = util.mkNixosSystem;
     mkDarwinSystem = util.mkDarwinSystem;
     mkHome = util.mkHome;
-    syncthingConfiguration = util.syncthingConfiguration;
-
-    installerSystems = {
-      basic = mkNixosInstaller "basic" [];
-    };
 
     nixosSystems = {
       horizon = mkNixosSystem "horizon";
@@ -170,14 +164,10 @@
       };
     });
 
-    installerConfigurations = installerSystems;
-
     nixosConfigurations = nixosSystems;
 
     darwinConfigurations = darwinSystems;
 
     homeConfigurations = homeConfigurations;
-
-    syncthingConfiguration = syncthingConfiguration;
   };
 }

modules/nixos-modules/sync.nix

@@ -1,7 +1,7 @@
 {
   config,
   lib,
-  outputs,
+  syncthingConfiguration,
   ...
 }: let
   mountDir = "/mnt/sync";
@@ -27,7 +27,7 @@ in {
           configDir = configDir;
           overrideDevices = true;
           overrideFolders = true;
-          configuration = outputs.syncthingConfiguration;
+          configuration = syncthingConfiguration;
           deviceName = config.networking.hostName;
         };
       }

util/default.nix

@@ -52,6 +52,12 @@
       home-manager-config
       ../modules/system-modules
     ];
+
+  syncthingConfiguration = nix-syncthing.lib.syncthingConfiguration {
+    modules = [
+      (import ../configurations/syncthing)
+    ];
+  };
 in {
   forEachPkgs = lambda: forEachSystem (system: lambda system (pkgsFor system));
 
@@ -62,19 +68,9 @@ in {
       (lib.mkUnless condition no)
     ];
 
-  mkNixosInstaller = host: userKeys:
-    nixpkgs.lib.nixosSystem {
-      modules = [
-        {
-          # TODO: authorized keys for all users and hosts
-        }
-        ../configurations/nixos/${host}
-      ];
-    };
-
   mkNixosSystem = host:
     nixpkgs.lib.nixosSystem {
-      specialArgs = {inherit inputs outputs util;};
+      specialArgs = {inherit inputs outputs util syncthingConfiguration;};
       modules =
         system-modules
         ++ [
@@ -119,10 +115,4 @@ in {
           ../configurations/home-manager/${user}
         ];
     };
-
-  syncthingConfiguration = nix-syncthing.lib.syncthingConfiguration {
-    modules = [
-      (import ../configurations/syncthing)
-    ];
-  };
 }