ecl-readline.nix

{ pkgs ? import <nixpkgs> {} }:
let
  inherit (pkgs) ecl gcc readline stdenv writeTextFile;
  inherit (builtins) fetchurl;
in stdenv.mkDerivation rec {
  name = "ecl-readline";
  version = "0.4.1";
  buildInputs = [
    gcc readline ecl
  ];

  binary = ''
      #!/usr/bin/env bash
      ${ecl}/bin/ecl -load "$out/lib/init.lsp" "\$@"
    '';
  library = ''
      (load #P\"$out/lib/ecl-readline.fas\")
      (load #P\"$out/lib/ecl-completions.fas\")
      (ecl-readline::enable)
  '';

  src = fetchurl {
    url = "http://www.common-lisp.net/project/ecl-readline/releases/${name}-${version}.tar.gz";
    sha256 = "1d83hixfi6144ai55nplzxpqwy4xcnz21q4y1xq57h021y8pbh89";
  };

  unpackPhase = "tar xzf $src";
  buildPhases = [ "unpackPhase" "buildPhase" "installPhase" ];
  buildPhase = ''
    cd ${name}-${version}
    ${ecl}/bin/ecl -compile ecl-readline.lisp -o ecl-readline.fas
    ${ecl}/bin/ecl -load ecl-readline.fas -compile ecl-completions.lisp -o ecl-completions.fas
  '';
  installPhase = ''
    mkdir -p "$out/bin" "$out/lib"
    mv *.fas "$out/lib"
    echo "${binary}" > "$out/bin/ecl"
    echo "${library}" > "$out/lib/init.lsp"
    chmod +x "$out/bin/ecl"
  '';
}