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//usr/lib/python2.6/site-packages/cloudinit/sources/DataSourceAliYun.py

# vi: ts=4 expandtab

import os

from cloudinit import sources
from cloudinit.sources import DataSourceEc2 as EC2
from cloudinit import util

DEF_MD_VERSION = "2016-01-01"
ALIYUN_PRODUCT = "Alibaba Cloud ECS"

class DataSourceAliYun(EC2.DataSourceEc2):
    metadata_urls = ["http://100.100.100.200"]

def __init__(self, sys_cfg, distro, paths):
        super(DataSourceAliYun, self).__init__(sys_cfg, distro, paths)
        self.seed_dir = os.path.join(paths.seed_dir, "AliYun")
        self.api_ver = DEF_MD_VERSION

def get_hostname(self, fqdn=False, _resolve_ip=False):
        return self.metadata.get('hostname', 'localhost.localdomain')

def get_public_ssh_keys(self):
        return parse_public_keys(self.metadata.get('public-keys', {}))

@property
    def cloud_platform(self):
        if self._cloud_platform is None:
            if _is_aliyun():
                self._cloud_platform = EC2.Platforms.ALIYUN
            else:
                self._cloud_platform = EC2.Platforms.NO_EC2_METADATA

return self._cloud_platform

def _is_aliyun():
    return util.read_dmi_data('system-product-name') == ALIYUN_PRODUCT

def parse_public_keys(public_keys):
    keys = []
    for key_id, key_body in public_keys.items():
        if isinstance(key_body, str):
            keys.append(key_body.strip())
        elif isinstance(key_body, list):
            keys.extend(key_body)
        elif isinstance(key_body, dict):
            key = key_body.get('openssh-key', [])
            if isinstance(key, str):
                keys.append(key.strip())
            elif isinstance(key, list):
                keys.extend(key)
    return keys

# Used to match classes to dependencies
datasources = [
    (DataSourceAliYun, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
]

# Return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
    return sources.list_from_depends(depends, datasources)