{ lib
, stdenv
, fetchFromGitHub
, substituteAll
, meson
, ninja
, pkg-config
, gnome
, glib
, gtk3
, gsettings-desktop-schemas
, gnome-desktop
, dbus
, json-glib
, libICE
, xmlto
, docbook_xsl
, docbook_xml_dtd_412
, python3
, libxslt
, gettext
, makeWrapper
, systemd
, xorg
, libepoxy
, bash
}:

stdenv.mkDerivation (finalAttrs: {
  pname = "budgie-session";
  version = "0.9.1";

  src = fetchFromGitHub {
    owner = "BuddiesOfBudgie";
    repo = "budgie-session";
    rev = "v${finalAttrs.version}";
    hash = "sha256-mz+Yh3NK2Tag+MWVofFFXYYXspxhmYBD6YCiuATpZSI=";
  };

  patches = [
    (substituteAll {
      src = ./fix-paths.patch;
      gsettings = "${glib.bin}/bin/gsettings";
      dbusLaunch = "${dbus.lib}/bin/dbus-launch";
      bash = "${bash}/bin/bash";
    })
  ];

  nativeBuildInputs = [
    meson
    ninja
    pkg-config
    gettext
    makeWrapper
    xmlto
    libxslt
    docbook_xsl
    docbook_xml_dtd_412
    python3
    dbus # for DTD
  ];

  buildInputs = [
    glib
    gtk3
    libICE
    gnome-desktop
    json-glib
    xorg.xtrans
    gnome.adwaita-icon-theme
    gnome.gnome-settings-daemon
    gsettings-desktop-schemas
    systemd
    libepoxy
  ];

  postPatch = ''
    chmod +x meson_post_install.py # patchShebangs requires executable file
    patchShebangs meson_post_install.py
  '';

  # `bin/budgie-session` will reset the environment when run in wayland, we
  # therefor wrap `libexec/budgie-session-binary` instead which is the actual
  # binary needing wrapping
  preFixup = ''
    wrapProgram "$out/libexec/budgie-session-binary" \
      --prefix GI_TYPELIB_PATH : "$GI_TYPELIB_PATH" \
      --suffix XDG_DATA_DIRS : "$out/share:$GSETTINGS_SCHEMAS_PATH" \
      --suffix XDG_CONFIG_DIRS : "${gnome.gnome-settings-daemon}/etc/xdg"
  '';

  separateDebugInfo = true;

  meta = {
    description = "Session manager for Budgie";
    homepage = "https://github.com/BuddiesOfBudgie/budgie-session";
    license = lib.licenses.gpl2Plus;
    maintainers = lib.teams.budgie.members;
    platforms = lib.platforms.linux;
  };
})