infra: configure nix-settings as part of base module

monorepo-revid: e8e6521c0182038cc29b403fbd62c49f26354a7f

1 files changed, 40 insertions, 0 deletions

diff --git a/infra/modules/base/nix-settings.nix b/infra/modules/base/nix-settings.nix
new file mode 100644
index 0000000..9f80663
--- /dev/null
+++ b/infra/modules/base/nix-settings.nix
@@ -0,0 +1,40 @@
+{ inputs, ... }:
+{
+  flake.modules.nixos.base =
+    { config, ... }:
+    {
+      nix = {
+        gc = {
+          automatic = true;
+          dates = "weekly";
+          options = "--delete-older-than 5d --log-format internal-json";
+          persistent = true;
+        };
+
+        optimise = {
+          automatic = true;
+          dates = "weekly";
+          persistent = true;
+        };
+
+        settings = {
+          auto-optimise-store = true;
+          experimental-features = [
+            "nix-command"
+            "flakes"
+          ];
+          allowed-users = [ ];
+          trusted-users = [ "@wheel" ];
+        };
+      };
+
+      system =
+        let
+          self = inputs.self;
+        in
+        {
+          configurationRevision = self.rev or self.dirtyRev or "unknown";
+          nixos.label = "${config.system.nixos.release}-${self.shortRev or self.dirtyShortRev or "unknown"}";
+        };
+    };
+}