nixos/speechd: init

nixos/modules/module-list.nix

@@ -356,6 +356,7 @@
   ./security/systemd-confinement.nix
   ./security/tpm2.nix
   ./security/wrappers/default.nix
+  ./services/accessibility/speechd.nix
   ./services/admin/docuum.nix
   ./services/admin/meshcentral.nix
   ./services/admin/oxidized.nix

nixos/modules/services/accessibility/speechd.nix

@@ -0,0 +1,33 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.services.speechd;
+  inherit (lib)
+    getExe
+    mkEnableOption
+    mkIf
+    mkPackageOption
+    ;
+in
+{
+  options.services.speechd = {
+    # FIXME: figure out how to deprecate this EXTREMELY CAREFULLY
+    enable = mkEnableOption "speech-dispatcher speech synthesizer daemon" // {
+      default = true;
+    };
+    package = mkPackageOption pkgs "speechd" { };
+  };
+
+  # FIXME: speechd 0.12 (or whatever the next version is)
+  # will support socket activation, so switch to that once it's out.
+  config = mkIf cfg.enable {
+    environment = {
+      systemPackages = [ cfg.package ];
+      sessionVariables.SPEECHD_CMD = getExe cfg.package;
+    };
+  };
+}