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import ./make-test-python.nix ({ pkgs, ...}:

let
  mkConfig = name: keys: ''
    import XMonad
    import XMonad.Operations (restart)
    import XMonad.Util.EZConfig
    import XMonad.Util.SessionStart
    import Control.Monad (when)
    import Text.Printf (printf)
    import System.Posix.Process (executeFile)
    import System.Info (arch,os)
    import System.Environment (getArgs)
    import System.FilePath ((</>))

    main = do
      dirs <- getDirectories
      launch (def { startupHook = startup } `additionalKeysP` myKeys) dirs

    startup = isSessionStart >>= \sessInit ->
      spawn "touch /tmp/${name}"
        >> if sessInit then setSessionStarted else spawn "xterm"

    myKeys = [${builtins.concatStringsSep ", " keys}]

    compiledConfig = printf "xmonad-%s-%s" arch os

    compileRestart resume = do
      dirs <- asks directories

      whenX (recompile dirs True) $
        when resume writeStateToFile
          *> catchIO
            ( do
                args <- getArgs
                executeFile (cacheDir dirs </> compiledConfig) False args Nothing
            )
  '';

  oldKeys =
    [ ''("M-C-x", spawn "xterm")''
      ''("M-q", restart "xmonad" True)''
      ''("M-C-q", compileRestart True)''
      ''("M-C-t", spawn "touch /tmp/somefile")'' # create somefile
    ];

  newKeys =
    [ ''("M-C-x", spawn "xterm")''
      ''("M-q", restart "xmonad" True)''
      ''("M-C-q", compileRestart True)''
      ''("M-C-r", spawn "rm /tmp/somefile")'' # delete somefile
    ];

  newConfig = pkgs.writeText "xmonad.hs" (mkConfig "newXMonad" newKeys);
in {
  name = "xmonad";
  meta = with pkgs.lib.maintainers; {
    maintainers = [ nequissimus ivanbrennan ];
  };

  nodes.machine = { pkgs, ... }: {
    imports = [ ./common/x11.nix ./common/user-account.nix ];
    test-support.displayManager.auto.user = "alice";
    services.displayManager.defaultSession = "none+xmonad";
    services.xserver.windowManager.xmonad = {
      enable = true;
      enableConfiguredRecompile = true;
      enableContribAndExtras = true;
      extraPackages = with pkgs.haskellPackages; haskellPackages: [ xmobar ];
      config = mkConfig "oldXMonad" oldKeys;
    };
  };

  testScript = { nodes, ... }: let
    user = nodes.machine.config.users.users.alice;
  in ''
    machine.wait_for_x()
    machine.wait_for_file("${user.home}/.Xauthority")
    machine.succeed("xauth merge ${user.home}/.Xauthority")
    machine.send_key("alt-ctrl-x")
    machine.wait_for_window("${user.name}.*machine")
    machine.sleep(1)
    machine.screenshot("terminal1")
    machine.succeed("rm /tmp/oldXMonad")
    machine.send_key("alt-q")
    machine.wait_for_file("/tmp/oldXMonad")
    machine.wait_for_window("${user.name}.*machine")
    machine.sleep(1)
    machine.screenshot("terminal2")

    # /tmp/somefile should not exist yet
    machine.fail("stat /tmp/somefile")

    # original config has a keybinding that creates somefile
    machine.send_key("alt-ctrl-t")
    machine.wait_for_file("/tmp/somefile")

    # set up the new config
    machine.succeed("mkdir -p ${user.home}/.xmonad")
    machine.copy_from_host("${newConfig}", "${user.home}/.config/xmonad/xmonad.hs")

    # recompile xmonad using the new config
    machine.send_key("alt-ctrl-q")
    machine.wait_for_file("/tmp/newXMonad")

    # new config has a keybinding that deletes somefile
    machine.send_key("alt-ctrl-r")
    machine.wait_until_fails("stat /tmp/somefile", timeout=30)

    # restart with the old config, and confirm the old keybinding is back
    machine.succeed("rm /tmp/oldXMonad")
    machine.send_key("alt-q")
    machine.wait_for_file("/tmp/oldXMonad")
    machine.send_key("alt-ctrl-t")
    machine.wait_for_file("/tmp/somefile")
  '';
})