abstracted host definitions in flake.nix

lib/default.nix

@@ -0,0 +1,17 @@
+{ inputs, username, nixpkgsConfig ? { allowUnfree = true; } }:
+
+let
+  mkHost = import ./mk_host.nix;
+in
+{
+  inherit mkHost;
+  foldHosts = hosts: inputs.nixpkgs.lib.foldl'
+    (acc: host:
+      let result = mkHost ({ inherit inputs username nixpkgsConfig; } // host);
+      in {
+        nixosConfigurations = acc.nixosConfigurations // result.nixosConfigurations;
+        homeConfigurations = acc.homeConfigurations // result.homeConfigurations;
+      })
+    { nixosConfigurations = {}; homeConfigurations = {}; }
+    hosts;
+}

lib/mk_host.nix

@@ -0,0 +1,60 @@
+{
+  inputs,
+  username,
+  nixpkgsConfig ? { allowUnfree = true; },
+  host,
+  hostDir,
+  system ? "x86_64-linux",
+  kind,
+  extraNixosModules ? [],
+  extraHomeModules ? [],
+  overlay ? true
+}:
+
+let
+  nixosModules = [
+    ../hosts/${hostDir}/config.nix
+    ../modules/sys
+    inputs.stylix.nixosModules.stylix
+  ] ++ extraNixosModules;
+  homeModules = [
+    ../hosts/${hostDir}/home.nix
+    ../modules/home
+    inputs.stylix.homeModules.stylix
+    inputs.nixvim.homeManagerModules.nixvim
+  ] ++ extraHomeModules;
+  pkgs = import inputs.nixpkgs {
+    inherit system;
+    config = nixpkgsConfig;
+    overlays = if overlay then [
+      (import ../overlay/overlay.nix { inherit host; root = inputs.self; })
+    ] else [];
+  };
+  specialArgs = {
+    inherit inputs username host;
+    self = inputs.self;
+  };
+
+  nixosCfg =
+    if kind == "nixos" || kind == "both" then
+      inputs.nixpkgs.lib.nixosSystem {
+        inherit system pkgs specialArgs;
+        modules = nixosModules;
+      }
+    else
+      null;
+
+  homeCfg =
+    if kind == "home" || kind == "both" then
+      inputs.home-manager.lib.homeManagerConfiguration {
+        inherit pkgs;
+        extraSpecialArgs = specialArgs;
+        modules = homeModules;
+      }
+    else
+      null;
+in
+  {
+    nixosConfigurations = if kind == "nixos" || kind == "both" then { ${host} = nixosCfg; } else {};
+    homeConfigurations = if kind == "home" || kind == "both" then { ${host + "Home"} = homeCfg; } else {};
+  }