mc: add midnight commander module (#7225)

modules/programs/mc.nix

@@ -0,0 +1,119 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.programs.mc;
+  type = (pkgs.formats.ini { }).type;
+in
+{
+  options.programs.mc = {
+    enable = lib.mkEnableOption "Midnight Commander";
+
+    package = lib.mkPackageOption pkgs "mc" { nullable = true; };
+
+    settings = lib.mkOption {
+      inherit type;
+      default = { };
+      description = ''
+        Settings for `mc/ini` file.
+
+        Any missing settings will fall back to the system default.
+      '';
+      example = {
+        Panels = {
+          show_dot_files = false;
+        };
+      };
+    };
+
+    keymapSettings = lib.mkOption {
+      inherit type;
+      default = { };
+      description = ''
+        Settings for `mc/mc.keymap` file.
+
+        Any missing settings will fall back to the system default.
+      '';
+      example = {
+        panel = {
+          Up = "up;ctrl-k";
+        };
+      };
+    };
+
+    extensionSettings = lib.mkOption {
+      inherit type;
+      default = { };
+      description = ''
+        Settings for `mc/mc.ext.ini` file. This setting completely replaces the default `/etc/mc/mc.ext.ini`.
+
+        Midnight Commander does not merge this file with the system default,
+        so you should copy the original if you want to preserve default behavior and add your changes there.
+      '';
+      example = {
+        EPUB = {
+          Shell = ".epub";
+          Open = "fbreader %f &";
+        };
+      };
+    };
+
+    panelsSettings = lib.mkOption {
+      inherit type;
+      default = { };
+      description = ''
+        Settings for `mc/panels` file.
+
+        Any missing settings will fall back to the system default.
+      '';
+      example = {
+        Dirs = {
+          current_is_left = false;
+          other_dir = "/home";
+        };
+      };
+    };
+
+    fileHighlightSettings = lib.mkOption {
+      inherit type;
+      default = { };
+      description = ''
+        Settings for `mc/filehighlight.ini` file. This setting completely replaces the default `/etc/mc/filehighlight.ini`.
+
+        Midnight Commander does not merge this file with the system default, so you should copy the original if you want to preserve default behavior
+        and add your changes there.
+      '';
+      example = {
+        lua = {
+          extensions = "lua;luac";
+        };
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    home.packages = lib.mkIf (cfg.package != null) [ cfg.package ];
+
+    xdg.configFile = {
+      "mc/ini" = lib.mkIf (cfg.settings != { }) {
+        text = lib.generators.toINI { } cfg.settings;
+      };
+      "mc/mc.keymap" = lib.mkIf (cfg.keymapSettings != { }) {
+        text = lib.generators.toINI { } cfg.keymapSettings;
+      };
+      "mc/mc.ext.ini" = lib.mkIf (cfg.extensionSettings != { }) {
+        text = lib.generators.toINI { } cfg.extensionSettings;
+      };
+      "mc/panels.ini" = lib.mkIf (cfg.panelsSettings != { }) {
+        text = lib.generators.toINI { } cfg.panelsSettings;
+      };
+      "mc/filehighlight.ini" = lib.mkIf (cfg.fileHighlightSettings != { }) {
+        text = lib.generators.toINI { } cfg.fileHighlightSettings;
+      };
+    };
+  };
+}