nixos/a2boot: init (#425576)

nixos/modules/services/network-filesystems/a2boot.nix

@@ -0,0 +1,38 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  cfg = config.services.a2boot;
+in
+{
+  options.services.a2boot = {
+    enable = lib.mkEnableOption "the a2boot daemon";
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.netatalk.partOf = [ "a2boot.service" ];
+    systemd.services.a2boot = {
+      description = "a2boot daemon";
+      unitConfig.Documentation = "man:a2boot(8)";
+      after = [
+        "network.target"
+        "netatalk.service"
+      ];
+      wantedBy = [ "multi-user.target" ];
+
+      path = [ pkgs.netatalk ];
+
+      serviceConfig = {
+        Type = "forking";
+        DynamicUser = true;
+        RuntimeDirectory = "a2boot";
+        ExecStart = "${pkgs.netatalk}/bin/a2boot";
+        Restart = "always";
+      };
+    };
+  };
+  meta.maintainers = with lib.maintainers; [ matthewcroughan ];
+}