Function maybe_cythonize

setup.py:394–424

Render tempita templates before calling cythonize. This is skipped for * clean * sdist

(extensions, *args, **kwargs)

# TODO(cython#4518): Need to check to see if e.g. `linetrace` has changed and
#  possibly re-compile.
def maybe_cythonize(extensions, *args, **kwargs):
    """
    Render tempita templates before calling cythonize. This is skipped for

    * clean
    * sdist
    """
    if "clean" in sys.argv or "sdist" in sys.argv:
        # See https://github.com/cython/cython/issues/1495
        return extensions

    elif not _CYTHON_INSTALLED:
        # GH#28836 raise a helpful error message
        if _CYTHON_VERSION:
            raise RuntimeError(
                f"Cannot cythonize with old Cython version ({_CYTHON_VERSION} "
                f"installed, needs {min_cython_ver})"
            )
        raise RuntimeError("Cannot cythonize without Cython installed.")

    # reuse any parallel arguments provided for compilation to cythonize
    parser = argparse.ArgumentParser()
    parser.add_argument("--parallel", "-j", type=int, default=1)
    parsed, _ = parser.parse_known_args()

    kwargs["nthreads"] = parsed.parallel
    build_ext.render_templates(_pxifiles)
    if debugging_symbols_requested:
        kwargs["gdb_debug"] = True

    return cythonize(extensions, *args, **kwargs)


def srcpath(name=None, suffix=".pyx", subdir="src"):