bdist_egg.py 文件源码

def do_install_data(self):
        # Hack for packages that install data to install's --install-lib
        self.get_finalized_command('install').install_lib = self.bdist_dir

        site_packages = os.path.normcase(os.path.realpath(_get_purelib()))
        old, self.distribution.data_files = self.distribution.data_files,[]

        for item in old:
            if isinstance(item,tuple) and len(item)==2:
                if os.path.isabs(item[0]):
                    realpath = os.path.realpath(item[0])
                    normalized = os.path.normcase(realpath)
                    if normalized==site_packages or normalized.startswith(
                        site_packages+os.sep
                    ):
                        item = realpath[len(site_packages)+1:], item[1]
                    # XXX else: raise ???
            self.distribution.data_files.append(item)

        try:
            log.info("installing package data to %s" % self.bdist_dir)
            self.call_command('install_data', force=0, root=None)
        finally:
            self.distribution.data_files = old