Move functions to helper.nix

flake.nix

@@ -19,115 +19,52 @@
     feishin-0_17_0.url = "github:NixOS/nixpkgs?ref=pull/414929/head"; # Feishin 0.17.0
   };
 
-  outputs = inputs @ {
+  outputs = {
-    nixpkgs,
     lanzaboote,
     nixos-hardware,
-    nixvim,
     sops-nix,
-    fluffychat-2_0_0,
-    feishin-0_17_0,
     ...
-  }:
+  } @ inputs: let
-    with nixpkgs.lib; let
+    helpers = import ./helpers.nix inputs;
-      mkHost = {
+    inherit (helpers) mergeHosts mkHost;
-        hostname,
+  in
-        suite,
+    mergeHosts [
-        platform ? "x86_64-linux",
+      (mkHost "muskduck" {
-        user ? "fern",
-        extraModules ? [],
-      }:
-        nixosSystem rec {
-          system = platform;
-
-          pkgs = import nixpkgs {
-            inherit system;
-            config = {
-              allowUnfree = true;
-              permittedInsecurePackages = [
-                "dotnet-sdk-6.0.428"
-                "dotnet-runtime-6.0.36"
-              ];
-            };
-          };
-
-          specialArgs = {
-            inherit
-              nixpkgs
-              hostname
-              suite
-              platform
-              user
-              ; # Inherit variables.
-
-            userPackages = {
-              fluffychat = fluffychat-2_0_0.legacyPackages.${system}.fluffychat;
-              feishin = feishin-0_17_0.legacyPackages.${system}.feishin;
-              webone = pkgs.callPackage ./packages/webone {};
-            };
-
-            secrets = builtins.toString inputs.secrets; # Secrets directory.
-          };
-
-          modules =
-            [
-              nixvim.nixosModules.nixvim
-              ./suites/common.nix
-              ./suites/${suite}.nix
-              ./hosts/${suite}/${hostname}.nix
-            ]
-            ++ (filesystem.listFilesRecursive ./modules)
-            ++ extraModules;
-        };
-    in {
-      nixosConfigurations = {
-        # Laptops.
-        muskduck = mkHost {
-          hostname = "muskduck";
         suite = "laptop";
         extraModules = [
           lanzaboote.nixosModules.lanzaboote
           nixos-hardware.nixosModules.lenovo-thinkpad-t480
         ];
-        };
+      })
 
-        # Servers.
+      (mkHost "weebill" {
-        weebill = mkHost {
-          hostname = "weebill";
         suite = "server";
         platform = "aarch64-linux";
         user = "docker";
         extraModules = [
           nixos-hardware.nixosModules.raspberry-pi-4
         ];
-        };
+      })
 
-        # Virtual machines.
+      (mkHost "docker" {
-        vm-docker = mkHost {
-          hostname = "docker";
         suite = "vm";
         user = "docker";
-        };
+      })
 
-        vm-minecraft = mkHost {
+      (mkHost "minecraft" {
-          hostname = "minecraft";
         suite = "vm";
         user = "docker";
-        };
+      })
 
-        # LXC containers.
+      (mkHost "technitium" {
-        lxc-technitium = mkHost {
-          hostname = "technitium";
         suite = "lxc";
-        };
+      })
 
-        lxc-firefox-syncserver = mkHost {
+      (mkHost "firefox-syncserver" {
-          hostname = "firefox-syncserver";
         suite = "lxc";
         extraModules = [
           sops-nix.nixosModules.sops
         ];
-        };
+      })
-      };
+    ];
-    };
 }

helpers.nix

@@ -0,0 +1,57 @@
+inputs:
+with inputs;
+with inputs.nixpkgs.lib; {
+  mergeHosts = lists.foldl' (
+    a: b: attrsets.recursiveUpdate a b
+  ) {};
+
+  mkHost = hostname: {
+    platform ? "x86_64-linux",
+    suite,
+    user ? "fern",
+    extraModules ? [],
+  }: {
+    nixosConfigurations.${hostname} = nixosSystem rec {
+      system = platform;
+
+      pkgs = import nixpkgs {
+        inherit system;
+        config = {
+          allowUnfree = true;
+          permittedInsecurePackages = [
+            "dotnet-sdk-6.0.428"
+            "dotnet-runtime-6.0.36"
+          ];
+        };
+      };
+
+      specialArgs = {
+        inherit
+          hostname
+          nixpkgs
+          suite
+          platform
+          user
+          ; # Inherit variables.
+
+        userPackages = {
+          fluffychat = fluffychat-2_0_0.legacyPackages.${system}.fluffychat;
+          feishin = feishin-0_17_0.legacyPackages.${system}.feishin;
+          webone = pkgs.callPackage ./packages/webone {};
+        };
+
+        secrets = builtins.toString inputs.secrets; # Secrets directory.
+      };
+
+      modules =
+        [
+          nixvim.nixosModules.nixvim
+          ./suites/common.nix
+          ./suites/${suite}.nix
+          ./hosts/${suite}/${hostname}.nix
+        ]
+        ++ (filesystem.listFilesRecursive ./modules)
+        ++ extraModules;
+    };
+  };
+}