home-manager/nix-darwin/default.nix

{
  config,
  lib,
  pkgs,
  ...
}:

let

  cfg = config.home-manager;

in
{
  imports = [ ../nixos/common.nix ];

  config = lib.mkMerge [
    { home-manager.extraSpecialArgs.darwinConfig = config; }
    (lib.mkIf (cfg.users != { }) {
      system.activationScripts.postActivation.text = lib.concatStringsSep "\n" (
        lib.mapAttrsToList (username: usercfg: ''
          echo Activating home-manager configuration for ${usercfg.home.username}
          sudo -u ${usercfg.home.username} --set-home ${pkgs.writeShellScript "activation-${usercfg.home.username}" ''
            ${lib.optionalString (
              cfg.backupFileExtension != null
            ) "export HOME_MANAGER_BACKUP_EXT=${lib.escapeShellArg cfg.backupFileExtension}"}
            ${lib.optionalString cfg.verbose "export VERBOSE=1"}
            exec ${usercfg.home.activationPackage}/activate
          ''}
        '') cfg.users
      );
    })
  ];
}