setup.py 文件源码

def download_fzf_binary(plat, arch, overwrite=False, access_token=None):
    bin_path = fzf_windows_bin_path if plat == 'windows' else fzf_bin_path
    if overwrite or not os.path.isfile(bin_path):
        asset = get_fzf_binary_url(plat, arch, access_token)
        url, ext = asset
        if access_token:
            url = '{0}?access_token={1}'.format(url, access_token)
        try:
            r = urllib2.urlopen(url)
        except urllib2.HTTPError as e:
            if e.code == 403 and e.info().get('X-RateLimit-Remaining') == 0:
                raise RuntimeError(
                    'GitHub rate limit reached. To increate the limit use '
                    '-g/--github-access-token option.\n  ' + str(e)
                )
            elif e.code == 401 and access_token:
                raise RuntimeError('Invalid GitHub access token.')
            raise
        extract(r, ext, bin_path)
        r.close()
    mode = os.stat(bin_path).st_mode
    if not (mode & 0o111):
        os.chmod(bin_path, mode | 0o111)