load modules from dir

modules/default.nix

@@ -0,0 +1,61 @@
+{
+  self,
+  lib,
+  inputs,
+  ...
+}:
+
+let
+  mkNixosModule = name: [{ ${name} = import ./${name}; }];
+  mkBaseImport = name: [ self.nixosModules.${name} ];
+
+  # create a list of directory names from given folder
+  filterModules = dir: builtins.attrNames (lib.attrsets.filterAttrs (n: v: v == "directory") (builtins.readDir dir));
+
+  # create nixosModules imports from list
+  flakeNixosModulesList = modules: lib.attrsets.mergeAttrsList (builtins.concatMap mkNixosModule modules);
+  flakeNixosBaseImports = modules: lib.lists.flatten (builtins.concatMap mkBaseImport modules);
+in
+{
+  # Configuration common to all Linux systems
+  flake = {
+    nixosModules = rec {} //
+      (flakeNixosModulesList (filterModules ./.)) //
+      {
+        base.imports = [
+          self.nixosModules.home-manager
+          inputs.agenix.nixosModules.default
+          inputs.musnix.nixosModules.musnix
+
+          ({
+            flake,
+            pkgs,
+            lib,
+            unstable,
+            master,
+            ...
+          }: {
+            nixpkgs.overlays = (import ../overlays) ++ [
+              (prev: next: {
+                scan2paperless = inputs.scan2paperless.legacyPackages.${prev.system}.scan2paperless;
+                nixd = inputs.unstable.legacyPackages.${prev.system}.nixd;
+
+                factorio-headless = inputs.master.legacyPackages.${prev.system}.factorio-headless;
+                paperless-ngx = inputs.master.legacyPackages.${prev.system}.paperless-ngx;
+                waybar = inputs.master.legacyPackages.${prev.system}.waybar;
+                element-desktop = inputs.master.legacyPackages.${prev.system}.element-desktop;
+
+                adlist = inputs.adblock-unbound.packages.${prev.system};
+              })
+            ];
+
+            nix.nixPath = [
+              "nixpkgs=${inputs.nixpkgs}"
+              "nixos-config=${../lib/compat/nixos}"
+              "home-manager=${inputs.home-manager}"
+            ];
+          })
+        ] ++ (flakeNixosBaseImports (filterModules ./.));
+    };
+  };
+}