whatstyle.py 文件源码

def compute_unified_diff(filename, content2, **kwargs):
    # type: (str, bytes, **Any) -> Tuple[int, Iterable[str]]
    diff = ()  # type: Iterable[str]
    exit_code = ERROR
    kw = kwargs.copy()
    if 'n' not in kwargs:
        # zero context lines
        kw['n'] = 0
    try:
        content1 = get_cached_file(filename)
        if PY3:
            c1 = unistr(content1)
            c2 = unistr(content2)
        else:
            c1 = content1
            c2 = content2
        diff = difflib.unified_diff(c1.splitlines(True), c2.splitlines(True), **kw)
        exit_code = OK
    finally:
        return exit_code, diff

# ---------------------------------------------------------------------
# Spare the user from specifying a formatter by finding a suitable one.