setup.py 文件源码

def load_mirror_index(self, remote_mirror):
        # See if there is a mirror index available from the BASE_URL
        mirror_index = os.path.join(self.conf_dir, 'mirror-index')
        try:
            cmd = [self.tools['git'], 'ls-remote', remote_mirror, self.base_branch]
            utils_setup.run_cmd(cmd, log=2, environment=self.env, cwd=self.project_dir, stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL)
        except:
            try:
                remote_mirror += "/.git"
                cmd = [self.tools['git'], 'ls-remote', remote_mirror, self.base_branch]
                utils_setup.run_cmd(cmd, log=2, environment=self.env, cwd=self.project_dir, stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL)
            except:
                # No mirror, return
                return None

        logger.plain('Loading the mirror index from %s (%s)...' % (remote_mirror, self.base_branch))
        # This MIGHT be a valid mirror..
        if not os.path.exists(mirror_index):
            os.makedirs(mirror_index)
            cmd = [self.tools['git'], 'init' ]
            utils_setup.run_cmd(cmd, log=2, environment=self.env, cwd=mirror_index)

        try:
            cmd = [self.tools['git'], 'fetch', '-f', '-n', '-u', remote_mirror, self.base_branch + ':' + self.base_branch]
            utils_setup.run_cmd(cmd, log=2, environment=self.env, cwd=mirror_index)
        except:
            # Could not fetch, return
            return None

        logger.debug('Found mirrored index.')
        cmd = [self.tools['git'], 'checkout', self.base_branch ]
        utils_setup.run_cmd(cmd, log=2, environment=self.env, cwd=mirror_index)
        cmd = [self.tools['git'], 'reset', '--hard' ]
        utils_setup.run_cmd(cmd, log=2, environment=self.env, cwd=mirror_index)

        return mirror_index