modules/community-builder: add motd

modules/darwin/community-builder/default.nix

@@ -11,6 +11,8 @@
     ./users.nix
   ];
 
+  environment.etc.motd.text = config.nixCommunity.motd;
+
   environment.systemPackages = [
     pkgs.vim
   ];

modules/nixos/community-builder/default.nix

@@ -1,4 +1,9 @@
-{ inputs, pkgs, ... }:
+{
+  config,
+  inputs,
+  pkgs,
+  ...
+}:
 {
   imports = [
     "${inputs.self}/modules/shared/community-builder.nix"
@@ -6,6 +11,8 @@
     ./users.nix
   ];
 
+  users.motd = config.nixCommunity.motd;
+
   environment.systemPackages = [
     # terminfo packages
     pkgs.foot.terminfo

modules/shared/community-builder.nix

@@ -1,5 +1,21 @@
-{ pkgs, ... }:
+{ lib, pkgs, ... }:
 {
+  options.nixCommunity.motd = lib.mkOption {
+    type = lib.types.str;
+    description = "message of the day";
+  };
+
+  config = {
+    nixCommunity.motd = ''
+
+      Welcome to Nix Community!
+
+      For a faster Nixpkgs clone use:
+
+      git clone --reference /var/lib/nixpkgs.git https://github.com/NixOS/nixpkgs.git
+
+    '';
+
     # useful for people that want to test stuff
     environment.systemPackages = [
       pkgs.fd
@@ -23,4 +39,5 @@
       '';
       promptInit = ""; # otherwise it'll override the grml prompt
     };
+  };
 }