{ lib
, stdenv
, fetchurl
, fetchpatch2
, meson
, ninja
, pkg-config
, atk
, cairo
, glib
, gtk3
, pango
, fribidi
, vala
, libxml2
, perl
, gettext
, gnome
, gobject-introspection
, dbus
, xvfb-run
, shared-mime-info
, testers
}:

stdenv.mkDerivation (finalAttrs: {
  pname = "gtksourceview";
  version = "4.8.4";

  outputs = [ "out" "dev" ];

  src = let
    inherit (finalAttrs) pname version;
  in fetchurl {
    url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
    sha256 = "fsnRj7KD0fhKOj7/O3pysJoQycAGWXs/uru1lYQgqH0=";
  };

  patches = [
    # By default, the library loads syntaxes from XDG_DATA_DIRS and user directory
    # but not from its own datadr (it assumes it will be in XDG_DATA_DIRS).
    # Since this is not generally true with Nix, let’s add $out/share unconditionally.
    ./4.x-nix_share_path.patch

    # nix.lang: Add Nix syntax highlighting
    # https://gitlab.gnome.org/GNOME/gtksourceview/-/merge_requests/303
    (fetchpatch2 {
      url = "https://gitlab.gnome.org/GNOME/gtksourceview/-/commit/685b3bd08869c2aefe33fad696a7f5f2dc831016.patch";
      hash = "sha256-yeYXJ2l/QS857C4UXOnMFyh0JsptA0TQt0lfD7wN5ic=";
    })

    # nix.lang: fix section name
    (fetchpatch2 {
      url = "https://gitlab.gnome.org/GNOME/gtksourceview/-/commit/1dbbb01da98140e0b2d5d0c6c2df29247650ed83.patch";
      hash = "sha256-6HxLKQyI5DDvmKhmldQlwVPV62RfFa2gwWbcHA2cICs=";
    })
  ];

  nativeBuildInputs = [
    meson
    ninja
    pkg-config
    gettext
    perl
    gobject-introspection
    vala
  ];

  buildInputs = [
    atk
    cairo
    glib
    pango
    fribidi
    libxml2
  ];

  propagatedBuildInputs = [
    # Required by gtksourceview-4.0.pc
    gtk3
    # Used by gtk_source_language_manager_guess_language
    shared-mime-info
  ];

  nativeCheckInputs = [
    xvfb-run
    dbus
  ];

  postPatch = ''
    # https://gitlab.gnome.org/GNOME/gtksourceview/-/merge_requests/295
    # build: drop unnecessary vapigen check
    substituteInPlace meson.build \
      --replace "if generate_vapi" "if false"
  '';

  # Broken by PCRE 2 bump in GLib.
  # https://gitlab.gnome.org/GNOME/gtksourceview/-/issues/283
  doCheck = false;

  checkPhase = ''
    runHook preCheck

    XDG_DATA_DIRS="$XDG_DATA_DIRS:${shared-mime-info}/share" \
    xvfb-run -s '-screen 0 800x600x24' dbus-run-session \
      --config-file=${dbus}/share/dbus-1/session.conf \
      meson test --no-rebuild --print-errorlogs

    runHook postCheck
  '';

  passthru = {
    updateScript = gnome.updateScript {
      packageName = "gtksourceview";
      attrPath = "gtksourceview4";
      versionPolicy = "odd-unstable";
      freeze = true;
    };
  };

  passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;

  meta = with lib; {
    description = "Source code editing widget for GTK";
    homepage = "https://gitlab.gnome.org/GNOME/gtksourceview";
    pkgConfigModules = [ "gtksourceview-4" ];
    platforms = platforms.unix;
    license = licenses.lgpl21Plus;
    maintainers = teams.gnome.members;
  };
})