Method build

mypy/test/testdiff.py:56–70

(self, source: str, options: Options)

        )

    def build(self, source: str, options: Options) -> tuple[list[str], dict[str, MypyFile] | None]:
        options.use_builtins_fixtures = True
        options.show_traceback = True
        options.cache_dir = os.devnull
        options.allow_empty_bodies = True
        try:
            result = build.build(
                sources=[BuildSource("main", None, source)],
                options=options,
                alt_lib_path=test_temp_dir,
            )
        except CompileError as e:
            # TODO: Is it okay to return None?
            return e.messages, None
        return result.errors, result.files