Start migration to using flake-parts

features-nixos/base/sops/sops.nix

@@ -0,0 +1,24 @@
+{
+  flake.nixosModules.base = {
+    inputs,
+    config,
+    ...
+  }: let
+    isEd25519 = k: k.type == "ed25519";
+    getKeyPath = k: k.path;
+    keys = builtins.filter isEd25519 config.services.openssh.hostKeys;
+  in {
+    imports = [inputs.sops-nix.nixosModules.sops];
+
+    sops.age = {
+      sshKeyPaths = map getKeyPath keys;
+
+      # TODO: remove? only rely on ssh or pgp keys (e.g. ubikey like misterio is using!!!)
+      # keyFile = "/home/julian/.config/sops/age/keys.txt";
+      # Generate key if none of the above worked. With this, building will still work, just without secrets
+      generateKey = false; # TODO: building should not work without secrets!?
+    };
+
+    sops.defaultSopsFile = ./secrets.yaml;
+  };
+}