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# Copyright: (c) 2018, Ansible Project # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) # Make coding more python3-ish from __future__ import (absolute_import, division, print_function) __metaclass__ = type import ast from itertools import islice, chain from types import GeneratorType from ansible.module_utils._text import to_text from ansible.module_utils.six import string_types from ansible.parsing.yaml.objects import AnsibleVaultEncryptedUnicode from ansible.utils.native_jinja import NativeJinjaText _JSON_MAP = { "true": True, "false": False, "null": None, } class Json2Python(ast.NodeTransformer): def visit_Name(self, node): if node.id not in _JSON_MAP: return node return ast.Constant(value=_JSON_MAP[node.id]) def ansible_eval_concat(nodes): """Return a string of concatenated compiled nodes. Throw an undefined error if any of the nodes is undefined. If the result of concat appears to be a dictionary, list or bool, try and convert it to such using literal_eval, the same mechanism as used in jinja2_native. Used in Templar.template() when jinja2_native=False and convert_data=True. """ head = list(islice(nodes, 2)) if not head: return '' if len(head) == 1: out = head[0] if isinstance(out, NativeJinjaText): return out out = to_text(out) else: if isinstance(nodes, GeneratorType): nodes = chain(head, nodes) out = ''.join([to_text(v) for v in nodes]) # if this looks like a dictionary, list or bool, convert it to such if out.startswith(('{', '[')) or out in ('True', 'False'): try: out = ast.literal_eval( ast.fix_missing_locations( Json2Python().visit( ast.parse(out, mode='eval') ) ) ) except (ValueError, SyntaxError, MemoryError): pass return out def ansible_concat(nodes): """Return a string of concatenated compiled nodes. Throw an undefined error if any of the nodes is undefined. Other than that it is equivalent to Jinja2's default concat function. Used in Templar.template() when jinja2_native=False and convert_data=False. """ return ''.join([to_text(v) for v in nodes]) def ansible_native_concat(nodes): """Return a native Python type from the list of compiled nodes. If the result is a single node, its value is returned. Otherwise, the nodes are concatenated as strings. If the result can be parsed with :func:`ast.literal_eval`, the parsed value is returned. Otherwise, the string is returned. https://github.com/pallets/jinja/blob/master/src/jinja2/nativetypes.py """ head = list(islice(nodes, 2)) if not head: return None if len(head) == 1: out = head[0] # TODO send unvaulted data to literal_eval? if isinstance(out, AnsibleVaultEncryptedUnicode): return out.data if isinstance(out, NativeJinjaText): # Sometimes (e.g. ``| string``) we need to mark variables # in a special way so that they remain strings and are not # passed into literal_eval. # See: # https://github.com/ansible/ansible/issues/70831 # https://github.com/pallets/jinja/issues/1200 # https://github.com/ansible/ansible/issues/70831#issuecomment-664190894 return out # short-circuit literal_eval for anything other than strings if not isinstance(out, string_types): return out else: if isinstance(nodes, GeneratorType): nodes = chain(head, nodes) out = ''.join([to_text(v) for v in nodes]) try: evaled = ast.literal_eval( # In Python 3.10+ ast.literal_eval removes leading spaces/tabs # from the given string. For backwards compatibility we need to # parse the string ourselves without removing leading spaces/tabs. ast.parse(out, mode='eval') ) except (ValueError, SyntaxError, MemoryError): return out if isinstance(evaled, string_types): quote = out[0] return f'{quote}{evaled}{quote}' return evaled