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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ# Copyright (C) 2012 Canonical Ltd. # Copyright (C) 2012 Hewlett-Packard Development Company, L.P. # Copyright (C) 2012 Yahoo! Inc. # Copyright (C) 2016 Amazon.com, Inc. or its affiliates. # # Author: Scott Moser # Author: Juerg Haefliger # Author: Joshua Harlow # Author: Andrew Jorgensen # # This file is part of cloud-init. See LICENSE file for license information. # noqa: E402 import collections import re import sys from typing import Type from cloudinit import log as logging from cloudinit import type_utils as tu from cloudinit import util from cloudinit.atomic_helper import write_file JUndefined: Type try: from jinja2 import DebugUndefined as _DebugUndefined from jinja2 import Template as JTemplate JINJA_AVAILABLE = True JUndefined = _DebugUndefined except (ImportError, AttributeError): JINJA_AVAILABLE = False JUndefined = object LOG = logging.getLogger(__name__) TYPE_MATCHER = re.compile(r"##\s*template:(.*)", re.I) BASIC_MATCHER = re.compile(r"\$\{([A-Za-z0-9_.]+)\}|\$([A-Za-z0-9_.]+)") MISSING_JINJA_PREFIX = "CI_MISSING_JINJA_VAR/" # Mypy, and the PEP 484 ecosystem in general, does not support creating # classes with dynamic base types: https://stackoverflow.com/a/59636248 class UndefinedJinjaVariable(JUndefined): # type: ignore """Class used to represent any undefined jinja template variable.""" def __str__(self): return "%s%s" % (MISSING_JINJA_PREFIX, self._undefined_name) def __sub__(self, other): other = str(other).replace(MISSING_JINJA_PREFIX, "") raise TypeError( 'Undefined jinja variable: "{this}-{other}". Jinja tried' ' subtraction. Perhaps you meant "{this}_{other}"?'.format( this=self._undefined_name, other=other ) ) def basic_render(content, params): """This does simple replacement of bash variable like templates. It identifies patterns like ${a} or $a and can also identify patterns like ${a.b} or $a.b which will look for a key 'b' in the dictionary rooted by key 'a'. """ def replacer(match): # Only 1 of the 2 groups will actually have a valid entry. name = match.group(1) if name is None: name = match.group(2) if name is None: raise RuntimeError("Match encountered but no valid group present") path = collections.deque(name.split(".")) selected_params = params while len(path) > 1: key = path.popleft() if not isinstance(selected_params, dict): raise TypeError( "Can not traverse into" " non-dictionary '%s' of type %s while" " looking for subkey '%s'" % (selected_params, tu.obj_name(selected_params), key) ) selected_params = selected_params[key] key = path.popleft() if not isinstance(selected_params, dict): raise TypeError( "Can not extract key '%s' from non-dictionary '%s' of type %s" % (key, selected_params, tu.obj_name(selected_params)) ) return str(selected_params[key]) return BASIC_MATCHER.sub(replacer, content) def detect_template(text): def jinja_render(content, params): # keep_trailing_newline is in jinja2 2.7+, not 2.6 add = "\n" if content.endswith("\n") else "" return ( JTemplate( content, undefined=UndefinedJinjaVariable, trim_blocks=True, extensions=["jinja2.ext.do"], ).render(**params) + add ) if text.find("\n") != -1: ident, rest = text.split("\n", 1) else: ident = text rest = "" type_match = TYPE_MATCHER.match(ident) if not type_match: return ("basic", basic_render, text) else: template_type = type_match.group(1).lower().strip() if template_type not in ("jinja", "basic"): raise ValueError( "Unknown template rendering type '%s' requested" % template_type ) if template_type == "jinja" and not JINJA_AVAILABLE: LOG.warning( "Jinja not available as the selected renderer for" " desired template, reverting to the basic renderer." ) return ("basic", basic_render, rest) elif template_type == "jinja" and JINJA_AVAILABLE: return ("jinja", jinja_render, rest) # Only thing left over is the basic renderer (it is always available). return ("basic", basic_render, rest) def render_from_file(fn, params): if not params: params = {} template_type, renderer, content = detect_template(util.load_file(fn)) LOG.debug("Rendering content of '%s' using renderer %s", fn, template_type) return renderer(content, params) def render_to_file(fn, outfn, params, mode=0o644): contents = render_from_file(fn, params) util.write_file(outfn, contents, mode=mode) def render_string_to_file(content, outfn, params, mode=0o644): """Render string""" contents = render_string(content, params) util.write_file(outfn, contents, mode=mode) def render_string(content, params): """Render string""" if not params: params = {} _template_type, renderer, content = detect_template(content) return renderer(content, params) def render_cloudcfg(variant, template, output): with open(template, "r") as fh: contents = fh.read() tpl_params = {"variant": variant} contents = (render_string(contents, tpl_params)).rstrip() + "\n" util.load_yaml(contents) if output == "-": sys.stdout.write(contents) else: write_file(output, contents, omode="w")