clipman: Add extraArgs option to clipman service

modules/services/clipman.nix

@@ -28,6 +28,18 @@ in
         otherwise the service may never be started.
       '';
     };
+
+    extraArgs = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [ ];
+      example = [
+        "--max-items"
+        "100"
+      ];
+      description = ''
+        Extra arguments to be passed to the clipman executable.
+      '';
+    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -46,7 +58,9 @@ in
       };
 
       Service = {
-        ExecStart = "${pkgs.wl-clipboard}/bin/wl-paste -t text --watch ${cfg.package}/bin/clipman store";
+        ExecStart =
+          "${pkgs.wl-clipboard}/bin/wl-paste -t text --watch ${cfg.package}/bin/clipman store"
+          + lib.optionalString (cfg.extraArgs != [ ]) " ${lib.escapeShellArgs cfg.extraArgs}";
         ExecReload = "${pkgs.coreutils}/bin/kill -SIGUSR2 $MAINPID";
         Restart = "on-failure";
         KillMode = "mixed";

tests/modules/services/clipman/clipman-extraargs.nix

@@ -0,0 +1,16 @@
+{
+  home.stateVersion = "21.11";
+
+  services.clipman = {
+    enable = true;
+    extraArgs = [
+      "--max-items"
+      "123"
+    ];
+  };
+
+  nmt.script = ''
+    serviceFile=$(normalizeStorePaths home-files/.config/systemd/user/clipman.service)
+    assertFileContent "$serviceFile" ${./clipman-extraargs.service}
+  '';
+}

tests/modules/services/clipman/clipman-extraargs.service

@@ -0,0 +1,14 @@
+[Install]
+WantedBy=graphical-session.target
+
+[Service]
+ExecReload=/nix/store/00000000000000000000000000000000-coreutils/bin/kill -SIGUSR2 $MAINPID
+ExecStart=@wl-clipboard@/bin/wl-paste -t text --watch @clipman@/bin/clipman store --max-items 123
+KillMode=mixed
+Restart=on-failure
+
+[Unit]
+After=graphical-session.target
+ConditionEnvironment=WAYLAND_DISPLAY
+Description=Clipboard management daemon
+PartOf=graphical-session.target

tests/modules/services/clipman/default.nix

@@ -2,4 +2,5 @@
 
 lib.optionalAttrs pkgs.stdenv.hostPlatform.isLinux {
   clipman-sway-session-target = ./clipman-sway-session-target.nix;
+  clipman-extraargs = ./clipman-extraargs.nix;
 }