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" lY> _)nZjbѿ m3 # This file is part of cloud-init. See LICENSE file for license information. from errno import EACCES import os import re try: from jinja2.exceptions import UndefinedError as JUndefinedError except ImportError: # No jinja2 dependency JUndefinedError = Exception from cloudinit import handlers from cloudinit import log as logging from cloudinit.sources import INSTANCE_JSON_FILE from cloudinit.templater import render_string, MISSING_JINJA_PREFIX from cloudinit.util import b64d, load_file, load_json, json_dumps from cloudinit.settings import PER_ALWAYS LOG = logging.getLogger(__name__) class JinjaTemplatePartHandler(handlers.Handler): prefixes = ['## template: jinja'] def __init__(self, paths, **_kwargs): handlers.Handler.__init__(self, PER_ALWAYS, version=3) self.paths = paths self.sub_handlers = {} for handler in _kwargs.get('sub_handlers', []): for ctype in handler.list_types(): self.sub_handlers[ctype] = handler def handle_part(self, data, ctype, filename, payload, frequency, headers): if ctype in handlers.CONTENT_SIGNALS: return jinja_json_file = os.path.join(self.paths.run_dir, INSTANCE_JSON_FILE) rendered_payload = render_jinja_payload_from_file( payload, filename, jinja_json_file) if not rendered_payload: return subtype = handlers.type_from_starts_with(rendered_payload) sub_handler = self.sub_handlers.get(subtype) if not sub_handler: LOG.warning( 'Ignoring jinja template for %s. Could not find supported' ' sub-handler for type %s', filename, subtype) return if sub_handler.handler_version == 3: sub_handler.handle_part( data, ctype, filename, rendered_payload, frequency, headers) elif sub_handler.handler_version == 2: sub_handler.handle_part( data, ctype, filename, rendered_payload, frequency) def render_jinja_payload_from_file( payload, payload_fn, instance_data_file, debug=False): """Render a jinja template payload sourcing variables from jinja_vars_path. @param payload: String of jinja template content. Should begin with ## template: jinja\n. @param payload_fn: String representing the filename from which the payload was read used in error reporting. Generally in part-handling this is 'part-##'. @param instance_data_file: A path to a json file containing variables that will be used as jinja template variables. @return: A string of jinja-rendered content with the jinja header removed. Returns None on error. """ instance_data = {} rendered_payload = None if not os.path.exists(instance_data_file): raise Ru