Initial commit

flake/den/templates/default/modules/aspects/eg/autologin.nix

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+{
+  # autologin is context-aware, parametric aspect.
+  # it applies only if the context has at least { user }
+  # meaning that has access to user data
+  eg.autologin =
+    { user, ... }:
+    {
+      nixos =
+        { config, lib, ... }:
+        lib.mkIf config.services.displayManager.enable {
+          services.displayManager.autoLogin.enable = true;
+          services.displayManager.autoLogin.user = user.userName;
+        };
+    };
+}

flake/den/templates/default/modules/aspects/eg/ci-no-boot.nix

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+{
+  eg.ci-no-boot = {
+    description = "Disables booting during CI";
+    nixos = {
+      boot.loader.grub.enable = false;
+      fileSystems."/".device = "/dev/null";
+    };
+  };
+}

flake/den/templates/default/modules/aspects/eg/routes.nix

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+# This example implements an aspect "routing" pattern.
+#
+# Unlike `den.default` which is `parametric.atLeast`
+# we use `parametric.fixedTo` here, which help us
+# propagate an already computed context to all includes.
+#
+# This aspect, when installed in a `parametric.atLeast`
+# will just forward the same context.
+# The `mutual` helper returns an static configuration which
+# is ignored by parametric aspects, thus allowing
+# non-existing aspects to be just ignored.
+#
+# Be sure to read: https://vic.github.io/den/dependencies.html
+# See usage at: defaults.nix, alice.nix, igloo.nix
+#
+{ den, eg, ... }:
+{
+  # Usage: `den.default.includes [ eg.routes ]`
+  eg.routes =
+    let
+      inherit (den.lib) parametric;
+
+      # eg, `<user>._.<host>` and `<host>._.<user>`
+      mutual = from: to: den.aspects.${from.aspect}._.${to.aspect} or { };
+
+      routes =
+        { host, user, ... }@ctx:
+        {
+          __functor = parametric.fixedTo ctx;
+          includes = [
+            (mutual user host)
+            (mutual host user)
+          ];
+        };
+    in
+    routes;
+}

flake/den/templates/default/modules/aspects/eg/vm-bootable.nix

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+let
+  installer = variant: {
+    nixos =
+      { modulesPath, ... }:
+      {
+        imports = [ (modulesPath + "/installer/cd-dvd/installation-cd-${variant}.nix") ];
+      };
+  };
+in
+{
+  # make USB/VM installers.
+  eg.vm-bootable.provides = {
+    tui = installer "minimal";
+    gui = installer "graphical-base";
+  };
+}

flake/den/templates/default/modules/aspects/eg/vm.nix

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+{ eg, ... }:
+{
+  eg.vm.provides = {
+    gui.includes = [
+      eg.vm
+      eg.vm-bootable._.gui
+      eg.xfce-desktop
+    ];
+
+    tui.includes = [
+      eg.vm
+      eg.vm-bootable._.tui
+    ];
+  };
+}

flake/den/templates/default/modules/aspects/eg/xfce-desktop.nix

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+{
+  eg.xfce-desktop.nixos =
+    { lib, ... }:
+    {
+      # https://gist.github.com/nat-418/1101881371c9a7b419ba5f944a7118b0
+      services.xserver = {
+        enable = true;
+        desktopManager = {
+          xterm.enable = false;
+          xfce.enable = true;
+        };
+      };
+
+      services.displayManager = {
+        defaultSession = lib.mkDefault "xfce";
+        enable = true;
+      };
+    };
+}