{ stdenv, lib, fetchFromGitHub
, meson, m4, gperf, gettext, pkgconfig, libxslt, ninja
, libcap, libudev
, enablePam ? true, pam
, docbook_xsl, docbook_xml_dtd_42, docbook_xml_dtd_45 }:

stdenv.mkDerivation rec {
  name = "elogind-${version}";
  version = "239.2";

  src = fetchFromGitHub {
    owner = "elogind";
    repo = "elogind";
    rev = "v${version}";
    sha256 = "17khwbzqmkfd3hcscs51kzdpvq9p2llm08vbpsdhy9yxgwfzlfa6";
  };

  postPatch = ''
    for f in man/*.xml; do
      substituteInPlace $f \
        --replace http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd ${docbook_xml_dtd_42}/xml/dtd/docbook/docbookx.dtd \
        --replace http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd ${docbook_xml_dtd_45}/xml/dtd/docbook/docbookx.dtd
    done

    patchShebangs .

    set -x
  '';

  preConfigure = ''
    mesonFlagsArray+=(-Drootprefix=$out)
    mesonFlagsArray+=(-Dsysconfdir=$out/etc)
    mesonFlagsArray+=(-Dpamconfdir=$out/etc/pam.d)
    mesonFlagsArray+=(-Dcgroup-controller=elogind)
  '';

  buildInputs = [ libcap libudev ] ++ lib.optional enablePam pam;
  nativeBuildInputs = [ meson m4 gperf gettext pkgconfig libxslt ninja docbook_xsl ];

  strictDeps = true;

  meta = with lib; {
    homepage = https://github.com/elogind/elogind;
    description = "logind, extracted to a standalone package";
    license = licenses.lgpl21Plus;
    maintainers = with maintainers; [ qyliss ];
    platforms = platforms.linux;
  };
}