util.py 文件源码

def unpack_file(filename, location, content_type, link):
    filename = os.path.realpath(filename)
    if (content_type == 'application/zip'
        or filename.endswith('.zip')
        or filename.endswith('.pybundle')
        or filename.endswith('.whl')
        or zipfile.is_zipfile(filename)):
        unzip_file(filename, location, flatten=not filename.endswith(('.pybundle', '.whl')))
    elif (content_type == 'application/x-gzip'
          or tarfile.is_tarfile(filename)
          or splitext(filename)[1].lower() in ('.tar', '.tar.gz', '.tar.bz2', '.tgz', '.tbz')):
        untar_file(filename, location)
    elif (content_type and content_type.startswith('text/html')
          and is_svn_page(file_contents(filename))):
        # We don't really care about this
        from pip.vcs.subversion import Subversion
        Subversion('svn+' + link.url).unpack(location)
    else:
        ## FIXME: handle?
        ## FIXME: magic signatures?
        logger.fatal('Cannot unpack file %s (downloaded from %s, content-type: %s); cannot detect archive format'
                     % (filename, location, content_type))
        raise InstallationError('Cannot determine archive format of %s' % location)