home-manager/tests/modules/misc/xdg/system-dirs.nix

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

{
  config = {
    xdg.systemDirs.config = [ "/etc/xdg" "/foo/bar" ];
    xdg.systemDirs.data = [ "/usr/local/share" "/usr/share" "/baz/quux" ];

    nmt.script = ''
      envFile=home-files/.config/environment.d/10-home-manager.conf
      assertFileExists $envFile
      assertFileContent $envFile ${
        pkgs.writeText "expected" ''
          LOCALE_ARCHIVE_2_27=${pkgs.glibcLocales}/lib/locale/locale-archive
          XDG_CONFIG_DIRS=/etc/xdg:/foo/bar''${XDG_CONFIG_DIRS:+:$XDG_CONFIG_DIRS}
          XDG_DATA_DIRS=/usr/local/share:/usr/share:/baz/quux''${XDG_DATA_DIRS:+:$XDG_DATA_DIRS}
        ''
      }

      sessionVarsFile=home-path/etc/profile.d/hm-session-vars.sh
      assertFileExists $sessionVarsFile
      assertFileContains $sessionVarsFile \
        'export XDG_CONFIG_DIRS="/etc/xdg:/foo/bar''${XDG_CONFIG_DIRS:+:$XDG_CONFIG_DIRS}"'
      assertFileContains $sessionVarsFile \
        'export XDG_DATA_DIRS="/usr/local/share:/usr/share:/baz/quux''${XDG_DATA_DIRS:+:$XDG_DATA_DIRS}"'
    '';
  };
}