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{ lib, stdenv, fetchFromGitHub, curl, libevent, rsync, ldc, dcompiler ? ldc }:

assert dcompiler != null;

stdenv.mkDerivation rec {
  pname = "dub";
  version = "1.36.0";

  enableParallelBuilding = true;

  src = fetchFromGitHub {
    owner = "dlang";
    repo = "dub";
    rev = "v${version}";
    sha256 = "sha256-S8pls9zxbGAQTwqYf4bDT2q7Ow12S8bBsJE5UmsACBs=";
  };

  #postUnpack = ''
  #  patchShebangs .
  #'';

  dubvar = "\\$DUB";
  postPatch = ''
    patchShebangs test

    # Can be removed with https://github.com/dlang/dub/pull/1368
    substituteInPlace test/fetchzip.sh \
        --replace "dub remove" "\"${dubvar}\" remove"
  '';

  nativeBuildInputs = [ dcompiler libevent rsync ];
  buildInputs = [ curl ];

  buildPhase = ''
    for DC_ in dmd ldmd2 gdmd; do
      echo "... check for D compiler $DC_ ..."
      export DC=$(type -P $DC_ || echo "")
      if [ ! "$DC" == "" ]; then
        break
      fi
    done
    if [ "$DC" == "" ]; then
      exit "Error: could not find D compiler"
    fi
    echo "$DC_ found and used as D compiler in buildPhase for $pname"
    $DC ./build.d
    ./build
  '';

  doCheck = !stdenv.isDarwin;

  checkPhase = ''
    export DUB=$NIX_BUILD_TOP/source/bin/dub
    export PATH=$PATH:$NIX_BUILD_TOP/source/bin/
    #export DC=${dcompiler.out}/bin/${if dcompiler.pname=="ldc" then "ldc2" else dcompiler.pname}
    if [ "$DC" == "" ]; then
      exit "Error: could not find D compiler"
    fi
    echo "DC out --> $DC"
    export HOME=$TMP

    rm -rf test/issue502-root-import
    rm -rf test/dpath-variable
    #rm test/dpath-variable.sh
    rm -rf test/git-dependency
    rm -rf test/use-c-sources # added to build v1.33.0
    rm -rf test/pr2642-cache-db # added to build v1.34.0
    rm -rf test/pr2644-describe-artifact-path # added to build v1.36.0
    rm -rf test/pr2647-build-deep # added to build v1.36.0

    ./test/run-unittest.sh
  '';

  installPhase = ''
    mkdir -p $out/bin
    cp bin/dub $out/bin
  '';

  meta = with lib; {
    description = "Package and build manager for D applications and libraries";
    homepage = "https://code.dlang.org/";
    license = licenses.mit;
    maintainers = with maintainers; [ jtbx ];
    platforms = [ "x86_64-linux" "i686-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
  };
}