import ./make-test.nix ({ pkgs, ... }: {
  name = "overlayfs";
  meta.maintainers = with pkgs.stdenv.lib.maintainers; [ bachp ];

  machine = { pkgs, ... }: {
    virtualisation.emptyDiskImages = [ 512 ];
    networking.hostId = "deadbeef";
    environment.systemPackages = with pkgs; [ parted ];
  };

  testScript = ''
    $machine->succeed("ls /dev");

    $machine->succeed("mkdir -p /tmp/mnt");

    # Test ext4 + overlayfs
    $machine->succeed(

      "mkfs.ext4 -F -L overlay-ext4 /dev/vdb",
      "mount -t ext4 /dev/vdb /tmp/mnt",

      "mkdir -p /tmp/mnt/upper /tmp/mnt/lower /tmp/mnt/work /tmp/mnt/merged",

      # Setup some existing files
      "echo 'Replace' > /tmp/mnt/lower/replace.txt",
      "echo 'Append' > /tmp/mnt/lower/append.txt",
      "echo 'Overwrite' > /tmp/mnt/lower/overwrite.txt",

      "mount -t overlay overlay -o lowerdir=/tmp/mnt/lower,upperdir=/tmp/mnt/upper,workdir=/tmp/mnt/work /tmp/mnt/merged",

      # Test new
      "echo 'New' > /tmp/mnt/merged/new.txt",
      "[[ \"\$(cat /tmp/mnt/merged/new.txt)\" == \"New\" ]]",

      # Test replace
      "[[ \"\$(cat /tmp/mnt/merged/replace.txt)\" == \"Replace\" ]]",
      "echo 'Replaced' > /tmp/mnt/merged/replace-tmp.txt",
      "mv /tmp/mnt/merged/replace-tmp.txt /tmp/mnt/merged/replace.txt",
      "[[ \"\$(cat /tmp/mnt/merged/replace.txt)\" == \"Replaced\" ]]",

      # Overwrite
      "[[ \"\$(cat /tmp/mnt/merged/overwrite.txt)\" == \"Overwrite\" ]]",
      "echo 'Overwritten' > /tmp/mnt/merged/overwrite.txt",
      "[[ \"\$(cat /tmp/mnt/merged/overwrite.txt)\" == \"Overwritten\" ]]",

      # Test append
      "[[ \"\$(cat /tmp/mnt/merged/append.txt)\" == \"Append\" ]]",
      "echo 'ed' >> /tmp/mnt/merged/append.txt",
      #"cat /tmp/mnt/merged/append.txt && exit 1",
      "[[ \"\$(cat /tmp/mnt/merged/append.txt)\" == \"Append\ned\" ]]",

      "umount /tmp/mnt/merged",
      "umount /tmp/mnt",
      "udevadm settle"
    );
  '';
})