clipse: use rfc 042 style settings

tests/modules/services/clipse/clipse-settings-expected.json

@@ -0,0 +1,9 @@
+{
+  "allowDuplicates": true,
+  "imageDisplay": {
+    "scaleX": 9,
+    "scaleY": 9,
+    "type": "kitty"
+  },
+  "maxHistory": 1001
+}

tests/modules/services/clipse/clipse-settings.nix

@@ -0,0 +1,31 @@
+{
+  services.clipse = {
+    enable = true;
+
+    settings = {
+      allowDuplicates = true;
+      imageDisplay = {
+        type = "kitty";
+        scaleX = 9;
+        scaleY = 9;
+      };
+    };
+
+    # Legacy option renamed to `services.clipse.settings.maxHistory`.
+    historySize = 1001;
+  };
+
+  test = {
+    stubs.clipse = { };
+
+    asserts.warnings.expected = [
+      "The option `services.clipse.historySize' defined in `${toString ./clipse-settings.nix}' has been renamed to `services.clipse.settings.maxHistory'."
+    ];
+  };
+
+  nmt.script = ''
+    configFile=home-files/.config/clipse/config.json
+    assertFileExists "$configFile"
+    assertFileContent "$configFile" ${./clipse-settings-expected.json}
+  '';
+}

tests/modules/services/clipse/default.nix

@@ -1,5 +1,6 @@
 { lib, pkgs, ... }:
 
 lib.optionalAttrs pkgs.stdenv.hostPlatform.isLinux {
+  clipse-settings = ./clipse-settings.nix;
   clipse-sway-session-target = ./clipse-sway-session-target.nix;
 }