From 56f8d29e6ecfeb57c6d30fe97ad8fe987b00784b Mon Sep 17 00:00:00 2001
From: Tilman Baumann <tilman@baumann.name>
Date: Fri, 4 Oct 2024 20:48:33 +0100
Subject: [PATCH] agenix activation without  perl is broken

systemd.sysusers.enable = false;

https://github.com/ryantm/agenix/issues/238
---
 common/{ => profiles}/minimal.nix |  0
 common/profiles/perlless.nix      | 32 +++++++++++++++++++++++++++++++
 flake.nix                         | 10 ++++------
 hosts/nas/default.nix             |  3 +++
 hosts/router/default.nix          |  3 ++-
 5 files changed, 41 insertions(+), 7 deletions(-)
 rename common/{ => profiles}/minimal.nix (100%)
 create mode 100755 common/profiles/perlless.nix

diff --git a/common/minimal.nix b/common/profiles/minimal.nix
similarity index 100%
rename from common/minimal.nix
rename to common/profiles/minimal.nix
diff --git a/common/profiles/perlless.nix b/common/profiles/perlless.nix
new file mode 100755
index 0000000..2934385
--- /dev/null
+++ b/common/profiles/perlless.nix
@@ -0,0 +1,32 @@
+# WARNING: If you enable this profile, you will NOT be able to switch to a new
+# configuration and thus you will not be able to rebuild your system with
+# nixos-rebuild!
+
+{ lib, ... }:
+
+{
+
+  # Disable switching to a new configuration. This is not a necessary
+  # limitation of a perlless system but just a current one. In the future,
+  # perlless switching might be possible.
+  system.switch.enable = lib.mkDefault false;
+
+  # Remove perl from activation
+  boot.initrd.systemd.enable = lib.mkDefault true;
+  system.etc.overlay.enable = lib.mkDefault true;
+  systemd.sysusers.enable = lib.mkDefault true;
+
+  # Random perl remnants
+  system.disableInstallerTools = lib.mkDefault true;
+  programs.less.lessopen = lib.mkDefault null;
+  programs.command-not-found.enable = lib.mkDefault false;
+  boot.enableContainers = lib.mkDefault false;
+  environment.defaultPackages = lib.mkDefault [ ];
+  documentation.info.enable = lib.mkDefault false;
+
+  # Check that the system does not contain a Nix store path that contains the
+  # string "perl".
+  #FIXME https://github.com/ryantm/agenix/issues/238
+  #system.forbiddenDependenciesRegexes = ["perl"];
+
+}
diff --git a/flake.nix b/flake.nix
index 90d6363..741c8f1 100755
--- a/flake.nix
+++ b/flake.nix
@@ -189,9 +189,8 @@
           impermanence.nixosModules.impermanence
           nixos-sbc.nixosModules.default
           nixos-sbc.nixosModules.boards.bananapi.bpir4
-          (nixpkgs.outPath + "/nixos/modules/profiles/headless.nix")
-          (nixpkgs.outPath + "/nixos/modules/profiles/perlless.nix")
-          ./common/minimal.nix
+          ./common/profiles/minimal.nix
+          ./common/profiles/perlless.nix
           ./hosts/router
         ];
         system = "aarch64-linux";
@@ -205,9 +204,8 @@
           impermanence.nixosModules.impermanence
           nixos-sbc.nixosModules.default
           nixos-sbc.nixosModules.boards.raspberrypi.rpi4
-          (nixpkgs.outPath + "/nixos/modules/profiles/headless.nix")
-          (nixpkgs.outPath + "/nixos/modules/profiles/perlless.nix")
-          ./common/minimal.nix
+          ./common/profiles/minimal.nix
+          ./common/profiles/perlless.nix
           ./hosts/nas
         ];
         system = "aarch64-linux";
diff --git a/hosts/nas/default.nix b/hosts/nas/default.nix
index 4c1f121..ba8ad2b 100755
--- a/hosts/nas/default.nix
+++ b/hosts/nas/default.nix
@@ -12,6 +12,9 @@
     };
   };
 
+  systemd.sysusers.enable = false; #FIXME https://github.com/ryantm/agenix/issues/238
+
+
   services.openssh.enable = true;
 
   nixarr = {
diff --git a/hosts/router/default.nix b/hosts/router/default.nix
index ff1361b..53ad74b 100644
--- a/hosts/router/default.nix
+++ b/hosts/router/default.nix
@@ -9,7 +9,8 @@
     ./hardware.nix
   ];
 
-  system.etc.overlay.enable = lib.mkForce false;
+  system.etc.overlay.enable = lib.mkForce false; #FIXME erofs not available on vendor kernel
+  systemd.sysusers.enable = lib.mkDefault true; #FIXME https://github.com/ryantm/agenix/issues/238
   boot.initrd.systemd.enable = lib.mkForce false;
 
   topology.self = {