templates/nixos: add basic nix config

2 files changed, 49 insertions, 0 deletions

diff --git a/templates/nixos/modules/basic.nix b/templates/nixos/modules/basic.nix
new file mode 100644
index 0000000..c1b5ebc
--- /dev/null
+++ b/templates/nixos/modules/basic.nix
@@ -0,0 +1,44 @@
+{
+  config,
+  lib,
+  inputs,
+  ...
+}: let
+  inherit (builtins) attrNames map;
+  inherit (lib) mkDefault mkEnableOption mkIf mkOption types;
+  cfg = config.getchoo.basicConfig;
+
+  mapInputs = fn: map fn (attrNames inputs);
+in {
+  options.getchoo.basicConfig = {
+    enable = mkEnableOption "getchoo's basic config" // {default = true;};
+    channelPath = {
+      enable =
+        mkEnableOption "enable channels"
+        // {default = true;};
+      dirname = mkOption {
+        type = types.str;
+        default = "/etc/nix/channels";
+        description = "directory where channels are saved";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    nix = {
+      gc = {
+        automatic = mkDefault true;
+        options = mkDefault "-d --delete-older-then 2d";
+      };
+
+      settings = {
+        auto-optimise-store = true;
+        experimental-features = ["nix-command" "flakes" "auto-allocate-uids" "repl-flake"];
+      };
+
+      nixPath = mapInputs (i: "${i}=${cfg.channelPath.dirname i}");
+    };
+
+    systemd.tmpfiles.rules = mapInputs (i: "L+ ${cfg.channelPath i}     - - - - ${inputs.${i}.outPath}");
+  };
+}
diff --git a/templates/nixos/modules/default.nix b/templates/nixos/modules/default.nix
new file mode 100644
index 0000000..ae107c1
--- /dev/null
+++ b/templates/nixos/modules/default.nix
@@ -0,0 +1,5 @@
+_: {
+  imports = [
+    ./basic.nix
+  ];
+}