Function write_file_if_changed

docs/sphinx_extensions/dfhack/util.py:13–26

(path)

@contextlib.contextmanager
def write_file_if_changed(path):
    with io.StringIO() as buffer:
        yield buffer
        new_contents = buffer.getvalue()

    try:
        with open(path, 'r') as infile:
            old_contents = infile.read()
    except IOError:
        old_contents = None

    if old_contents != new_contents:
        with open(path, 'w') as outfile:
            outfile.write(new_contents)


# directive argument helpers (supplementing docutils.parsers.rst.directives)