feat: Dynamic templating

sp-modules/simple-nixos-mailserver/flake.nix

@@ -14,6 +14,27 @@
     };
     configPathsNeeded =
       builtins.fromJSON (builtins.readFile ./config-paths-needed.json);
+    meta = { lib, ... }: {
+      spModuleVersion = 1;
+      id = "simple-nixos-mailserver";
+      name = "Mail Server";
+      description = "E-Mail for company and family.";
+      svgIcon = builtins.readFile ./icon.svg;
+      isMovable = true;
+      isRequired = true;
+      canBeBackedUp = true;
+      backupDescription = "Mail boxes and filters.";
+      systemdServices = [
+        "dovecot2.service"
+        "postfix.service"
+      ];
+      user = "virtualMail";
+      folders = [
+        "/var/vmail"
+        "/var/sieve"
+      ];
+      supportLevel = "normal";
+    };
 
     # TODO generate json docs from module? something like:
     # nix eval --impure --expr 'let flake = builtins.getFlake (builtins.toPath ./.); pkgs = flake.inputs.mailserver.inputs.nixpkgs.legacyPackages.x86_64-linux; in (pkgs.nixosOptionsDoc { inherit (pkgs.lib.evalModules { modules = [ flake.nixosModules.default ]; }) options; }).optionsJSON'