vim module: init

nixos/modules/module-list.nix

@@ -84,6 +84,7 @@
   ./programs/ssmtp.nix
   ./programs/tmux.nix
   ./programs/venus.nix
+  ./programs/vim.nix
   ./programs/wvdial.nix
   ./programs/xfs_quota.nix
   ./programs/xonsh.nix

nixos/modules/programs/vim.nix

@@ -0,0 +1,24 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.vim;
+in {
+  options.programs.vim = {
+    defaultEditor = mkOption {
+      type = types.bool;
+      default = false;
+      example = true;
+      description = ''
+        When enabled, installs vim and configures vim to be the default editor
+        using the EDITOR environment variable.
+      '';
+    };
+  };
+
+  config = mkIf cfg.defaultEditor {
+        environment.systemPackages = [ pkgs.vim ];
+        environment.variables = { EDITOR = mkOverride 900 "vim"; };
+  };
+}