nixpkgs/pkgs/by-name/db/dbus/package.nix

{
  stdenv,
  lib,
  fetchurl,
  pkg-config,
  expat,
  enableSystemd ? lib.meta.availableOn stdenv.hostPlatform systemdMinimal,
  systemdMinimal,
  audit,
  libcap_ng,
  libapparmor,
  dbus,
  docbook_xml_dtd_44,
  docbook-xsl-nons,
  libxslt,
  meson,
  ninja,
  python3,
  x11Support ? (stdenv.hostPlatform.isLinux || stdenv.hostPlatform.isDarwin),
  writeText,
  libx11,
  libsm,
  libice,
}:

stdenv.mkDerivation (finalAttrs: {
  pname = "dbus";
  version = "1.16.2";

  outputs = [
    "out"
    "dev"
    "lib"
    "doc"
    "man"
  ];

  separateDebugInfo = true;

  src = fetchurl {
    url = "https://dbus.freedesktop.org/releases/dbus/dbus-${finalAttrs.version}.tar.xz";
    sha256 = "sha256-C6KhpLFq/nvOssB+nOmajCw1COXewpDbtkM4S9a+t+I=";
  };

  patches = [
    # Implement getgrouplist for platforms where it is not available (e.g. Illumos/Solaris)
    ./implement-getgrouplist.patch

    # Add a Meson configuration option that will allow us to use a different
    # `datadir` for installation from the one that will be compiled into dbus.
    # This is necessary to allow NixOS to manage dbus service definitions,
    # since the `datadir` in the package will be immutable. But we still want
    # to install the files to the latter, since there is no other suitable
    # place for the project to install them.
    #
    # We will also just remove installation of empty `${runstatedir}/dbus`
    # and `${localstatedir}/lib/dbus` since these are useless in the package.
    ./meson-install-dirs.patch
  ]
  ++ lib.optionals stdenv.hostPlatform.isDarwin [
    # Fixes Darwin issues like:
    # dyld[29056]: Library not loaded: @rpath/libdbus-1.3.dylib
    #   Referenced from: <...> /nix/store/.../bin/dbus-run-session
    #   Reason: no LC_RPATH's found
    ./set-install_rpath.patch
  ];

  strictDeps = true;

  nativeBuildInputs = [
    meson
    ninja
    pkg-config
    docbook_xml_dtd_44
    docbook-xsl-nons
    libxslt # for xsltproc
    python3
  ];

  buildInputs = [
    expat
  ]
  ++ lib.optionals x11Support [
    libx11
    libice
    libsm
  ]
  ++ lib.optional enableSystemd systemdMinimal
  ++ lib.optionals stdenv.hostPlatform.isLinux [
    audit
    libapparmor
    libcap_ng
  ];
  # ToDo: optional selinux?

  __darwinAllowLocalNetworking = true;

  env = lib.optionalAttrs stdenv.hostPlatform.isStatic {
    NIX_LDFLAGS = "-lcap-ng";
  };

  mesonFlags = [
    "--libexecdir=${placeholder "out"}/libexec"
    # datadir from which dbus will load files will be managed by the NixOS module:
    "--datadir=/etc"
    # But we still want to install stuff to the package:
    "-Dinstall_datadir=${placeholder "out"}/share"
    "--localstatedir=/var"
    "-Druntime_dir=/run"
    "--sysconfdir=/etc"
    "-Dinstall_sysconfdir=${placeholder "out"}/etc"
    "-Ddoxygen_docs=disabled"
    "-Dducktype_docs=disabled"
    "-Dlaunchd_agent_dir=${placeholder "out"}/Library/LaunchAgents"
    "-Dqt_help=disabled"
    "-Drelocation=disabled" # Conflicts with multiple outputs
    "-Dmodular_tests=disabled" # Requires glib
    "-Dsession_socket_dir=/tmp"
    "-Dsystemd_system_unitdir=${placeholder "out"}/etc/systemd/system"
    "-Dsystemd_user_unitdir=${placeholder "out"}/etc/systemd/user"
    (lib.mesonEnable "x11_autolaunch" x11Support)
    (lib.mesonEnable "apparmor" stdenv.hostPlatform.isLinux)
    (lib.mesonEnable "epoll" stdenv.hostPlatform.isLinux)
    (lib.mesonEnable "inotify" stdenv.hostPlatform.isLinux)
    (lib.mesonEnable "libaudit" stdenv.hostPlatform.isLinux)
    (lib.mesonEnable "kqueue" (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isBSD))
    (lib.mesonEnable "launchd" stdenv.hostPlatform.isDarwin)
    (lib.mesonEnable "systemd" enableSystemd)
    "-Dselinux=disabled"
  ]
  ++ lib.optionals stdenv.hostPlatform.isDarwin [
    # D-Bus defaults to launchd-activation on Darwin, but that requires the launch agent be installed. It also breaks
    # anything that uses `dbus-run-session` in tests. Changing the default aligns Darwin with other UNIX platforms.
    "-Ddbus_session_bus_listen_address=unix:tmpdir=/tmp"
    # `launchctl` is only needed at runtime. Lie to `find_program` because it will always be present on a Darwin host.
    "--cross-file=${writeText "darwin.ini" ''
      [binaries]
      launchctl = 'true'
    ''}"
  ]
  ++ lib.optionals enableSystemd [
    "--cross-file=${writeText "crossfile.ini" ''
      [binaries]
      systemctl = '${systemdMinimal}/bin/systemctl'
    ''}"
  ];

  doCheck = true;

  postPatch = ''
    patchShebangs \
      test/data/copy_data_for_tests.py \
      meson_post_install.py

    # Cleanup of runtime references
    substituteInPlace ./dbus/dbus-sysdeps-unix.c \
      --replace-fail 'DBUS_BINDIR "/dbus-launch"' "\"$lib/bin/dbus-launch\""
    substituteInPlace ./tools/dbus-launch.c \
      --replace-fail 'DBUS_DAEMONDIR"/dbus-daemon"' '"/run/current-system/sw/bin/dbus-daemon"'
  '';

  postInstall = lib.optionalString stdenv.hostPlatform.isDarwin ''
    # For some reason, only these binaries reference the dylib by rpath instead of by an absolute install name.
    for exe in bin/dbus-daemon bin/dbus-run-session libexec/dbus-daemon-launch-helper; do
      install_name_tool "$out/$exe" \
        -change "@rpath/libdbus-1.3.dylib" "$lib/lib/libdbus-1.3.dylib"
    done
  '';

  postFixup = ''
    # It's executed from $lib by absolute path
    moveToOutput bin/dbus-launch "$lib"
    ln -s "$lib/bin/dbus-launch" "$out/bin/"
  '';

  passthru = {
    dbus-launch = "${dbus.lib}/bin/dbus-launch";
  };

  meta = {
    description = "Simple interprocess messaging system";
    homepage = "https://www.freedesktop.org/wiki/Software/dbus/";
    changelog = "https://gitlab.freedesktop.org/dbus/dbus/-/blob/dbus-${finalAttrs.version}/NEWS";
    license = lib.licenses.gpl2Plus; # most is also under AFL-2.1
    teams = [ lib.teams.freedesktop ];
    platforms = lib.platforms.unix;
    identifiers.cpeParts = lib.meta.cpeFullVersionWithVendor "freedesktop" finalAttrs.version;
  };
})