bootstrap.py 文件源码

def load_boto(self):
        update = boto.config.get('Boto', 'boto_update', 'svn:HEAD')
        if update.startswith('svn'):
            if update.find(':') >= 0:
                method, version = update.split(':')
                version = '-r%s' % version
            else:
                version = '-rHEAD'
            location = boto.config.get('Boto', 'boto_location', '/usr/local/boto')
            self.run('svn update %s %s' % (version, location))
        elif update.startswith('git'):
            location = boto.config.get('Boto', 'boto_location', '/usr/share/python-support/python-boto/boto')
            num_remaining_attempts = 10
            while num_remaining_attempts > 0:
                num_remaining_attempts -= 1
                try:
                    self.run('git pull', cwd=location)
                    num_remaining_attempts = 0
                except Exception, e:
                    boto.log.info('git pull attempt failed with the following exception. Trying again in a bit. %s', e)
                    time.sleep(2)
            if update.find(':') >= 0:
                method, version = update.split(':')
            else:
                version = 'master'
            self.run('git checkout %s' % version, cwd=location)
        else:
            # first remove the symlink needed when running from subversion
            self.run('rm /usr/local/lib/python2.5/site-packages/boto')
            self.run('easy_install %s' % update)