keen4: modernize & adopt (#390436)

{

  lib,

  stdenv,

  fetchurl,

  dosbox,

  unzip,

  fetchzip,

  lib,

  writeShellApplication,

}:

stdenv.mkDerivation {

  name = "keen4";

  src = fetchurl {

    url = "http://tarballs.nixos.org/keen4.zip";

    sha256 = "12rnc9ksl7v6l8wsxvr26ylkafzq80dbsa7yafzw9pqc8pafkhx1";

let

  zip = fetchzip {

    name = "keen4.zip";

    url = "https://archive.org/download/msdos_Commander_Keen_4_-_Secret_of_the_Oracle_1991/Commander_Keen_4_-_Secret_of_the_Oracle_1991.zip";

    hash = "sha256-vVfBQArNH1JPUxM5suMe8NK54a+NAMnDhLKxVUOzUgA=";

  };

in

writeShellApplication {

  name = "keen4";

  nativeBuildInputs = [ unzip ];

  installPhase = ''

    mkdir -p $out/share/keen4

    mv * $out/share/keen4

    mkdir -p $out/bin

    cat > $out/bin/keen4 <<EOF

    #! $SHELL -e

    if test -z "\$HOME"; then

        echo "HOME directory not set"

        exit 1

    fi

  runtimeInputs = [ dosbox ];

  # Game wants to write in the current directory, but of course we can't

  # let it write in the Nix store.  So create symlinks to the game files

  # in ~/.keen4 and execute game from there.

    mkdir -p \$HOME/.keen4

    cd \$HOME/.keen4

    ln -sf $out/share/keen4/* .

    ${dosbox}/bin/dosbox ./KEEN4E.EXE -fullscreen -exit || true

    # Cleanup the symlinks.

    for i in *; do

        if test -L "\$i"; then

            rm "\$i"

        fi

    done

    EOF

    chmod +x $out/bin/keen4

  text = ''

    mkdir -p "''${HOME:-.}/.keen4"

    cd "''${HOME:-.}/.keen4"

    # avoid linking CONFIG.CK4, which must be writable

    ln -sft . ${zip}/{AUDIO.CK4,EGAGRAPH.CK4,GAMEMAPS.CK4,KEEN4E.EXE}

    trap 'find . -type l -delete' EXIT

    dosbox ./KEEN4E.EXE -fullscreen -exit

  '';

  meta = {

    description = "Commander Keen Episode 4: Secret of the Oracle";

    license = lib.licenses.unfree;

    maintainers = [ ];

    homepage = "https://web.archive.org/web/20141013080934/http://www.3drealms.com/keen4/index.html";

    downloadPage = "https://archive.org/details/msdos_Commander_Keen_4_-_Secret_of_the_Oracle_1991";

    license = lib.licenses.unfreeRedistributable;

    platforms = dosbox.meta.platforms;

    sourceProvenance = with lib.sourceTypes; [ binaryBytecode ]; # emulated by dosbox, so "bytecode" in a way

    maintainers = with lib.maintainers; [ wolfgangwalther ];

    mainProgram = "keen4";

  };

}