install hwpackrary from web or local files system.

    :param url: web address or file path
    :param replace_existing: bool
    :rtype: None

def install_hwpack(url, replace_existing=False):
    """install hwpackrary from web or local files system.

    :param url: web address or file path
    :param replace_existing: bool
    :rtype: None

    """
    d = tmpdir(tmpdir())
    f = download(url)
    Archive(f).extractall(d)

    clean_dir(d)
    src_dhwpack = find_hwpack_dir(d)

    targ_dhwpack = hwpack_dir() / src_dhwpack.name
    doaction = 0
    if targ_dhwpack.exists():
        log.debug('hwpack already exists: %s', targ_dhwpack)
        if replace_existing:
            log.debug('remove %s', targ_dhwpack)
            targ_dhwpack.rmtree()
            doaction = 1
    else:
        doaction = 1

    if doaction:
        log.debug('move %s -> %s', src_dhwpack, targ_dhwpack)
        src_dhwpack.move(targ_dhwpack)

        hwpack_dir().copymode(targ_dhwpack)
        for x in targ_dhwpack.walk():
            hwpack_dir().copymode(x)