{ lib, stdenv, fetchurl, autoreconfHook
, cxxSupport ? true
, compat185 ? true
, dbmSupport ? false

# Options from inherited versions
, version, sha256
, extraPatches ? [ ]
, license ? lib.licenses.sleepycat
, drvArgs ? {}
}:

stdenv.mkDerivation (rec {
  pname = "db";
  inherit version;

  src = fetchurl {
    url = "https://download.oracle.com/berkeley-db/${pname}-${version}.tar.gz";
    sha256 = sha256;
  };

  # The provided configure script features `main` returning implicit `int`, which causes
  # configure checks to work incorrectly with clang 16.
  nativeBuildInputs = [ autoreconfHook ];

  patches = extraPatches;

  outputs = [ "bin" "out" "dev" ];

  # Required when regenerated the configure script to make sure the vendored macros are found.
  autoreconfFlags = [ "-fi" "-Iaclocal" "-Iaclocal_java" ];

  preAutoreconf = ''
    pushd dist
    # Upstream’s `dist/s_config` cats everything into `aclocal.m4`, but that doesn’t work with
    # autoreconfHook, so cat `config.m4` to another file. Otherwise, it won’t be found by `aclocal`.
    cat aclocal/config.m4 >> aclocal/options.m4
  '';

  # This isn’t pretty. The version information is kept separate from the configure script.
  # After the configure script is regenerated, the version information has to be replaced with the
  # contents of `dist/RELEASE`.
  postAutoreconf = ''
    (
      declare -a vars=(
        "DB_VERSION_FAMILY"
        "DB_VERSION_RELEASE"
        "DB_VERSION_MAJOR"
        "DB_VERSION_MINOR"
        "DB_VERSION_PATCH"
        "DB_VERSION_STRING"
        "DB_VERSION_FULL_STRING"
        "DB_VERSION_UNIQUE_NAME"
        "DB_VERSION"
      )
      source RELEASE
      for var in "''${vars[@]}"; do
        sed -e "s/__EDIT_''${var}__/''${!var}/g" -i configure
      done
    )
    popd
  '';

  configureFlags =
    [
      (if cxxSupport then "--enable-cxx" else "--disable-cxx")
      (if compat185 then "--enable-compat185" else "--disable-compat185")
    ]
    ++ lib.optional dbmSupport "--enable-dbm"
    ++ lib.optional stdenv.isFreeBSD "--with-pic"
    ++ (drvArgs.configureFlags or []);

  preConfigure = ''
    cd build_unix
    configureScript=../dist/configure
  '';

  postInstall = ''
    rm -rf $out/docs
  '';

  enableParallelBuilding = true;

  doCheck = true;

  checkPhase = ''
    make examples_c examples_cxx
  '';

  meta = with lib; {
    homepage = "https://www.oracle.com/database/technologies/related/berkeleydb.html";
    description = "Berkeley DB";
    license = license;
    platforms = platforms.unix;
  };
} // builtins.removeAttrs drvArgs [ "configureFlags" ])
