feat(thunderbird): created headless service

Headless service can synchronize mails and calendar even client is
closed

home-manager/default.nix

@@ -22,5 +22,6 @@
       ./rofi.nix
       ./tmux.nix
       ./stalonetray.nix
+      ./thunderbird.nix
     ];
 }

home-manager/thunderbird.nix

@@ -0,0 +1,40 @@
+{ config, lib, pkgs, ... }:
+with lib;
+let
+  serviceName = "thunderbird-headless";
+
+  thunderbird = pkgs.thunderbird.overrideAttrs (attrs: {
+    desktopItem = attrs.desktopItem.override (old: {
+      exec = pkgs.writeShellScript "thunderbird-wrapper" ''
+        ${pkgs.systemd}/bin/systemctl --user stop ${serviceName}
+        ${old.exec}
+      '';
+    });
+  });
+in
+{
+  options.programs.thunderbird.wittano.enable = mkEnableOption "thunderbird";
+  config = mkIf config.programs.thunderbird.wittano.enable {
+    home.packages = [ thunderbird ];
+
+    systemd.user = rec {
+      services.${serviceName} = {
+        Unit = {
+          Description = "Thunderbird in headless mode";
+          After = [ "network.target" ];
+        };
+
+        Service = {
+          ExecStart = "${thunderbird}/bin/thunderbird --headless";
+          ExecCondition = "${pkgs.bash}/bin/bash -c '! ${pkgs.toybox}/bin/pgrep thunderbird'";
+        };
+      };
+      timers.${serviceName} = {
+        inherit (services.${serviceName}) Unit;
+
+        Timer.OnCalendar = "*-*-* *:*:00";
+      };
+    };
+
+  };
+}

hosts/common.nix

@@ -26,6 +26,7 @@ let
     home.stateVersion = systemVersion;
 
     programs = {
+      thunderbird.wittano.enable = true;
       mpv.enable = true;
       btop.enable = true;
       nitrogen.wittano.enable = true;
@@ -97,7 +98,6 @@ let
       vivaldi
 
       # Utils 
-      thunderbird # Mail
       eog # Image viewer
       onlyoffice-bin # Office staff
       nemo