lorri service module: init

nixos/modules/module-list.nix

@@ -316,6 +316,7 @@
   ./services/development/bloop.nix
   ./services/development/hoogle.nix
   ./services/development/jupyter/default.nix
+  ./services/development/lorri.nix
   ./services/editors/emacs.nix
   ./services/editors/infinoted.nix
   ./services/games/factorio.nix

nixos/modules/services/development/lorri.nix

@@ -0,0 +1,45 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.lorri;
+  socketPath = "lorri/daemon.socket";
+in {
+  options = {
+    services.lorri = {
+      enable = lib.mkOption {
+        default = false;
+        type = lib.types.bool;
+        description = ''
+          Enables the daemon for `lorri`, a nix-shell replacement for project
+          development. The socket-activated daemon starts on the first request
+          issued by the `lorri` command.
+        '';
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.user.sockets.lorri = {
+      description = "Socket for Lorri Daemon";
+      wantedBy = [ "sockets.target" ];
+      socketConfig = {
+        ListenStream = "%t/${socketPath}";
+        RuntimeDirectory = "lorri";
+      };
+    };
+
+    systemd.user.services.lorri = {
+      description = "Lorri Daemon";
+      requires = [ "lorri.socket" ];
+      after = [ "lorri.socket" ];
+      path = with pkgs; [ config.nix.package gnutar gzip ];
+      serviceConfig = {
+        ExecStart = "${pkgs.lorri}/bin/lorri daemon";
+        PrivateTmp = true;
+        ProtectSystem = "strict";
+        ProtectHome = "read-only";
+        Restart = "on-failure";
+      };
+    };
+  };
+}