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ansible/lib/ansible/plugins/filter/core.py

695 lines
23 KiB
Python

# (c) 2012, Jeroen Hoekx <jeroen@hoekx.be>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import annotations
import base64
import glob
import hashlib
import json
import ntpath
import os.path
import re
import shlex
import sys
import time
import uuid
import yaml
import datetime
from collections.abc import Mapping
from functools import partial
from random import Random, SystemRandom, shuffle
from jinja2.filters import pass_environment
from ansible.errors import AnsibleError, AnsibleFilterError, AnsibleFilterTypeError
from ansible.module_utils.six import string_types, integer_types, reraise, text_type
from ansible.module_utils.common.text.converters import to_bytes, to_native, to_text
from ansible.module_utils.common.collections import is_sequence
from ansible.module_utils.common.yaml import yaml_load, yaml_load_all
from ansible.parsing.ajson import AnsibleJSONEncoder
from ansible.parsing.yaml.dumper import AnsibleDumper
from ansible.template import recursive_check_defined
from ansible.utils.display import Display
from ansible.utils.encrypt import do_encrypt, PASSLIB_AVAILABLE
from ansible.utils.hashing import md5s, checksum_s
from ansible.utils.unicode import unicode_wrap
from ansible.utils.vars import merge_hash
display = Display()
UUID_NAMESPACE_ANSIBLE = uuid.UUID('361E6D51-FAEC-444A-9079-341386DA8E2E')
def to_yaml(a, *args, **kw):
'''Make verbose, human-readable yaml'''
default_flow_style = kw.pop('default_flow_style', None)
try:
transformed = yaml.dump(a, Dumper=AnsibleDumper, allow_unicode=True, default_flow_style=default_flow_style, **kw)
except Exception as e:
raise AnsibleFilterError("to_yaml - %s" % to_native(e), orig_exc=e)
return to_text(transformed)
def to_nice_yaml(a, indent=4, *args, **kw):
'''Make verbose, human-readable yaml'''
try:
transformed = yaml.dump(a, Dumper=AnsibleDumper, indent=indent, allow_unicode=True, default_flow_style=False, **kw)
except Exception as e:
raise AnsibleFilterError("to_nice_yaml - %s" % to_native(e), orig_exc=e)
return to_text(transformed)
def to_json(a, *args, **kw):
''' Convert the value to JSON '''
# defaults for filters
if 'vault_to_text' not in kw:
kw['vault_to_text'] = True
if 'preprocess_unsafe' not in kw:
kw['preprocess_unsafe'] = False
return json.dumps(a, cls=AnsibleJSONEncoder, *args, **kw)
def to_nice_json(a, indent=4, sort_keys=True, *args, **kw):
'''Make verbose, human-readable JSON'''
# TODO separators can be potentially exposed to the user as well
kw.pop('separators', None)
return to_json(a, indent=indent, sort_keys=sort_keys, separators=(',', ': '), *args, **kw)
def to_bool(a):
''' return a bool for the arg '''
if a is None or isinstance(a, bool):
return a
if isinstance(a, string_types):
a = a.lower()
if a in ('yes', 'on', '1', 'true', 1):
return True
return False
def to_datetime(string, format="%Y-%m-%d %H:%M:%S"):
return datetime.datetime.strptime(string, format)
def strftime(string_format, second=None, utc=False):
''' return a date string using string. See https://docs.python.org/3/library/time.html#time.strftime for format '''
if utc:
timefn = time.gmtime
else:
timefn = time.localtime
if second is not None:
try:
second = float(second)
except Exception:
raise AnsibleFilterError('Invalid value for epoch value (%s)' % second)
return time.strftime(string_format, timefn(second))
def quote(a):
''' return its argument quoted for shell usage '''
if a is None:
a = u''
return shlex.quote(to_text(a))
def fileglob(pathname):
''' return list of matched regular files for glob '''
return [g for g in glob.glob(pathname) if os.path.isfile(g)]
def regex_replace(value='', pattern='', replacement='', ignorecase=False, multiline=False, count=0, mandatory_count=0):
''' Perform a `re.sub` returning a string '''
value = to_text(value, errors='surrogate_or_strict', nonstring='simplerepr')
flags = 0
if ignorecase:
flags |= re.I
if multiline:
flags |= re.M
_re = re.compile(pattern, flags=flags)
(output, subs) = _re.subn(replacement, value, count=count)
if mandatory_count and mandatory_count != subs:
raise AnsibleFilterError("'%s' should match %d times, but matches %d times in '%s'"
% (pattern, mandatory_count, count, value))
return output
def regex_findall(value, regex, multiline=False, ignorecase=False):
''' Perform re.findall and return the list of matches '''
value = to_text(value, errors='surrogate_or_strict', nonstring='simplerepr')
flags = 0
if ignorecase:
flags |= re.I
if multiline:
flags |= re.M
return re.findall(regex, value, flags)
def regex_search(value, regex, *args, **kwargs):
''' Perform re.search and return the list of matches or a backref '''
value = to_text(value, errors='surrogate_or_strict', nonstring='simplerepr')
groups = list()
for arg in args:
if arg.startswith('\\g'):
match = re.match(r'\\g<(\S+)>', arg).group(1)
groups.append(match)
elif arg.startswith('\\'):
match = int(re.match(r'\\(\d+)', arg).group(1))
groups.append(match)
else:
raise AnsibleFilterError('Unknown argument')
flags = 0
if kwargs.get('ignorecase'):
flags |= re.I
if kwargs.get('multiline'):
flags |= re.M
match = re.search(regex, value, flags)
if match:
if not groups:
return match.group()
else:
items = list()
for item in groups:
items.append(match.group(item))
return items
def ternary(value, true_val, false_val, none_val=None):
''' value ? true_val : false_val '''
if value is None and none_val is not None:
return none_val
elif bool(value):
return true_val
else:
return false_val
def regex_escape(string, re_type='python'):
"""Escape all regular expressions special characters from STRING."""
string = to_text(string, errors='surrogate_or_strict', nonstring='simplerepr')
if re_type == 'python':
return re.escape(string)
elif re_type == 'posix_basic':
# list of BRE special chars:
# https://en.wikibooks.org/wiki/Regular_Expressions/POSIX_Basic_Regular_Expressions
return regex_replace(string, r'([].[^$*\\])', r'\\\1')
# TODO: implement posix_extended
# It's similar to, but different from python regex, which is similar to,
# but different from PCRE. It's possible that re.escape would work here.
# https://remram44.github.io/regex-cheatsheet/regex.html#programs
elif re_type == 'posix_extended':
raise AnsibleFilterError('Regex type (%s) not yet implemented' % re_type)
else:
raise AnsibleFilterError('Invalid regex type (%s)' % re_type)
def from_yaml(data):
if isinstance(data, string_types):
# The ``text_type`` call here strips any custom
# string wrapper class, so that CSafeLoader can
# read the data
return yaml_load(text_type(to_text(data, errors='surrogate_or_strict')))
return data
def from_yaml_all(data):
if isinstance(data, string_types):
# The ``text_type`` call here strips any custom
# string wrapper class, so that CSafeLoader can
# read the data
return yaml_load_all(text_type(to_text(data, errors='surrogate_or_strict')))
return data
@pass_environment
def rand(environment, end, start=None, step=None, seed=None):
if seed is None:
r = SystemRandom()
else:
r = Random(seed)
if isinstance(end, integer_types):
if not start:
start = 0
if not step:
step = 1
return r.randrange(start, end, step)
elif hasattr(end, '__iter__'):
if start or step:
raise AnsibleFilterError('start and step can only be used with integer values')
return r.choice(end)
else:
raise AnsibleFilterError('random can only be used on sequences and integers')
def randomize_list(mylist, seed=None):
try:
mylist = list(mylist)
if seed:
r = Random(seed)
r.shuffle(mylist)
else:
shuffle(mylist)
except Exception:
pass
return mylist
def get_hash(data, hashtype='sha1'):
try:
h = hashlib.new(hashtype)
except Exception as e:
# hash is not supported?
raise AnsibleFilterError(e)
h.update(to_bytes(data, errors='surrogate_or_strict'))
return h.hexdigest()
def get_encrypted_password(password, hashtype='sha512', salt=None, salt_size=None, rounds=None, ident=None):
passlib_mapping = {
'md5': 'md5_crypt',
'blowfish': 'bcrypt',
'sha256': 'sha256_crypt',
'sha512': 'sha512_crypt',
}
hashtype = passlib_mapping.get(hashtype, hashtype)
unknown_passlib_hashtype = False
if PASSLIB_AVAILABLE and hashtype not in passlib_mapping and hashtype not in passlib_mapping.values():
unknown_passlib_hashtype = True
display.deprecated(
f"Checking for unsupported password_hash passlib hashtype '{hashtype}'. "
"This will be an error in the future as all supported hashtypes must be documented.",
version='2.19'
)
try:
return do_encrypt(password, hashtype, salt=salt, salt_size=salt_size, rounds=rounds, ident=ident)
except AnsibleError as e:
reraise(AnsibleFilterError, AnsibleFilterError(to_native(e), orig_exc=e), sys.exc_info()[2])
except Exception as e:
if unknown_passlib_hashtype:
# This can occur if passlib.hash has the hashtype attribute, but it has a different signature than the valid choices.
# In 2.19 this will replace the deprecation warning above and the extra exception handling can be deleted.
choices = ', '.join(passlib_mapping)
raise AnsibleFilterError(f"{hashtype} is not in the list of supported passlib algorithms: {choices}") from e
raise
def to_uuid(string, namespace=UUID_NAMESPACE_ANSIBLE):
uuid_namespace = namespace
if not isinstance(uuid_namespace, uuid.UUID):
try:
uuid_namespace = uuid.UUID(namespace)
except (AttributeError, ValueError) as e:
raise AnsibleFilterError("Invalid value '%s' for 'namespace': %s" % (to_native(namespace), to_native(e)))
# uuid.uuid5() requires bytes on Python 2 and bytes or text or Python 3
return to_text(uuid.uuid5(uuid_namespace, to_native(string, errors='surrogate_or_strict')))
def mandatory(a, msg=None):
"""Make a variable mandatory."""
from jinja2.runtime import Undefined
if isinstance(a, Undefined):
if a._undefined_name is not None:
name = "'%s' " % to_text(a._undefined_name)
else:
name = ''
if msg is not None:
raise AnsibleFilterError(to_native(msg))
raise AnsibleFilterError("Mandatory variable %s not defined." % name)
return a
def combine(*terms, **kwargs):
recursive = kwargs.pop('recursive', False)
list_merge = kwargs.pop('list_merge', 'replace')
if kwargs:
raise AnsibleFilterError("'recursive' and 'list_merge' are the only valid keyword arguments")
# allow the user to do `[dict1, dict2, ...] | combine`
dictionaries = flatten(terms, levels=1)
# recursively check that every elements are defined (for jinja2)
recursive_check_defined(dictionaries)
if not dictionaries:
return {}
if len(dictionaries) == 1:
return dictionaries[0]
# merge all the dicts so that the dict at the end of the array have precedence
# over the dict at the beginning.
# we merge the dicts from the highest to the lowest priority because there is
# a huge probability that the lowest priority dict will be the biggest in size
# (as the low prio dict will hold the "default" values and the others will be "patches")
# and merge_hash create a copy of it's first argument.
# so high/right -> low/left is more efficient than low/left -> high/right
high_to_low_prio_dict_iterator = reversed(dictionaries)
result = next(high_to_low_prio_dict_iterator)
for dictionary in high_to_low_prio_dict_iterator:
result = merge_hash(dictionary, result, recursive, list_merge)
return result
def comment(text, style='plain', **kw):
# Predefined comment types
comment_styles = {
'plain': {
'decoration': '# '
},
'erlang': {
'decoration': '% '
},
'c': {
'decoration': '// '
},
'cblock': {
'beginning': '/*',
'decoration': ' * ',
'end': ' */'
},
'xml': {
'beginning': '<!--',
'decoration': ' - ',
'end': '-->'
}
}
# Pointer to the right comment type
style_params = comment_styles[style]
if 'decoration' in kw:
prepostfix = kw['decoration']
else:
prepostfix = style_params['decoration']
# Default params
p = {
'newline': '\n',
'beginning': '',
'prefix': (prepostfix).rstrip(),
'prefix_count': 1,
'decoration': '',
'postfix': (prepostfix).rstrip(),
'postfix_count': 1,
'end': ''
}
# Update default params
p.update(style_params)
p.update(kw)
# Compose substrings for the final string
str_beginning = ''
if p['beginning']:
str_beginning = "%s%s" % (p['beginning'], p['newline'])
str_prefix = ''
if p['prefix']:
if p['prefix'] != p['newline']:
str_prefix = str(
"%s%s" % (p['prefix'], p['newline'])) * int(p['prefix_count'])
else:
str_prefix = str(
"%s" % (p['newline'])) * int(p['prefix_count'])
str_text = ("%s%s" % (
p['decoration'],
# Prepend each line of the text with the decorator
text.replace(
p['newline'], "%s%s" % (p['newline'], p['decoration'])))).replace(
# Remove trailing spaces when only decorator is on the line
"%s%s" % (p['decoration'], p['newline']),
"%s%s" % (p['decoration'].rstrip(), p['newline']))
str_postfix = p['newline'].join(
[''] + [p['postfix'] for x in range(p['postfix_count'])])
str_end = ''
if p['end']:
str_end = "%s%s" % (p['newline'], p['end'])
# Return the final string
return "%s%s%s%s%s" % (
str_beginning,
str_prefix,
str_text,
str_postfix,
str_end)
@pass_environment
def extract(environment, item, container, morekeys=None):
if morekeys is None:
keys = [item]
elif isinstance(morekeys, list):
keys = [item] + morekeys
else:
keys = [item, morekeys]
value = container
for key in keys:
value = environment.getitem(value, key)
return value
def b64encode(string, encoding='utf-8'):
return to_text(base64.b64encode(to_bytes(string, encoding=encoding, errors='surrogate_or_strict')))
def b64decode(string, encoding='utf-8'):
return to_text(base64.b64decode(to_bytes(string, errors='surrogate_or_strict')), encoding=encoding)
def flatten(mylist, levels=None, skip_nulls=True):
ret = []
for element in mylist:
if skip_nulls and element in (None, 'None', 'null'):
# ignore null items
continue
elif is_sequence(element):
if levels is None:
ret.extend(flatten(element, skip_nulls=skip_nulls))
elif levels >= 1:
# decrement as we go down the stack
ret.extend(flatten(element, levels=(int(levels) - 1), skip_nulls=skip_nulls))
else:
ret.append(element)
else:
ret.append(element)
return ret
def subelements(obj, subelements, skip_missing=False):
'''Accepts a dict or list of dicts, and a dotted accessor and produces a product
of the element and the results of the dotted accessor
>>> obj = [{"name": "alice", "groups": ["wheel"], "authorized": ["/tmp/alice/onekey.pub"]}]
>>> subelements(obj, 'groups')
[({'name': 'alice', 'groups': ['wheel'], 'authorized': ['/tmp/alice/onekey.pub']}, 'wheel')]
'''
if isinstance(obj, dict):
element_list = list(obj.values())
elif isinstance(obj, list):
element_list = obj[:]
else:
raise AnsibleFilterError('obj must be a list of dicts or a nested dict')
if isinstance(subelements, list):
subelement_list = subelements[:]
elif isinstance(subelements, string_types):
subelement_list = subelements.split('.')
else:
raise AnsibleFilterTypeError('subelements must be a list or a string')
results = []
for element in element_list:
values = element
for subelement in subelement_list:
try:
values = values[subelement]
except KeyError:
if skip_missing:
values = []
break
raise AnsibleFilterError("could not find %r key in iterated item %r" % (subelement, values))
except TypeError:
raise AnsibleFilterTypeError("the key %s should point to a dictionary, got '%s'" % (subelement, values))
if not isinstance(values, list):
raise AnsibleFilterTypeError("the key %r should point to a list, got %r" % (subelement, values))
for value in values:
results.append((element, value))
return results
def dict_to_list_of_dict_key_value_elements(mydict, key_name='key', value_name='value'):
''' takes a dictionary and transforms it into a list of dictionaries,
with each having a 'key' and 'value' keys that correspond to the keys and values of the original '''
if not isinstance(mydict, Mapping):
raise AnsibleFilterTypeError("dict2items requires a dictionary, got %s instead." % type(mydict))
ret = []
for key in mydict:
ret.append({key_name: key, value_name: mydict[key]})
return ret
def list_of_dict_key_value_elements_to_dict(mylist, key_name='key', value_name='value'):
''' takes a list of dicts with each having a 'key' and 'value' keys, and transforms the list into a dictionary,
effectively as the reverse of dict2items '''
if not is_sequence(mylist):
raise AnsibleFilterTypeError("items2dict requires a list, got %s instead." % type(mylist))
try:
return dict((item[key_name], item[value_name]) for item in mylist)
except KeyError:
raise AnsibleFilterTypeError(
"items2dict requires each dictionary in the list to contain the keys '%s' and '%s', got %s instead."
% (key_name, value_name, mylist)
)
except TypeError:
raise AnsibleFilterTypeError("items2dict requires a list of dictionaries, got %s instead." % mylist)
def path_join(paths):
''' takes a sequence or a string, and return a concatenation
of the different members '''
if isinstance(paths, string_types):
return os.path.join(paths)
if is_sequence(paths):
return os.path.join(*paths)
raise AnsibleFilterTypeError("|path_join expects string or sequence, got %s instead." % type(paths))
def commonpath(paths):
"""
Retrieve the longest common path from the given list.
:param paths: A list of file system paths.
:type paths: List[str]
:returns: The longest common path.
:rtype: str
"""
if not is_sequence(paths):
raise AnsibleFilterTypeError("|commonpath expects sequence, got %s instead." % type(paths))
return os.path.commonpath(paths)
class FilterModule(object):
''' Ansible core jinja2 filters '''
def filters(self):
return {
# base 64
'b64decode': b64decode,
'b64encode': b64encode,
# uuid
'to_uuid': to_uuid,
# json
'to_json': to_json,
'to_nice_json': to_nice_json,
'from_json': json.loads,
# yaml
'to_yaml': to_yaml,
'to_nice_yaml': to_nice_yaml,
'from_yaml': from_yaml,
'from_yaml_all': from_yaml_all,
# path
'basename': partial(unicode_wrap, os.path.basename),
'dirname': partial(unicode_wrap, os.path.dirname),
'expanduser': partial(unicode_wrap, os.path.expanduser),
'expandvars': partial(unicode_wrap, os.path.expandvars),
'path_join': path_join,
'realpath': partial(unicode_wrap, os.path.realpath),
'relpath': partial(unicode_wrap, os.path.relpath),
'splitext': partial(unicode_wrap, os.path.splitext),
'win_basename': partial(unicode_wrap, ntpath.basename),
'win_dirname': partial(unicode_wrap, ntpath.dirname),
'win_splitdrive': partial(unicode_wrap, ntpath.splitdrive),
'commonpath': commonpath,
'normpath': partial(unicode_wrap, os.path.normpath),
# file glob
'fileglob': fileglob,
# types
'bool': to_bool,
'to_datetime': to_datetime,
# date formatting
'strftime': strftime,
# quote string for shell usage
'quote': quote,
# hash filters
# md5 hex digest of string
'md5': md5s,
# sha1 hex digest of string
'sha1': checksum_s,
# checksum of string as used by ansible for checksumming files
'checksum': checksum_s,
# generic hashing
'password_hash': get_encrypted_password,
'hash': get_hash,
# regex
'regex_replace': regex_replace,
'regex_escape': regex_escape,
'regex_search': regex_search,
'regex_findall': regex_findall,
# ? : ;
'ternary': ternary,
# random stuff
'random': rand,
'shuffle': randomize_list,
# undefined
'mandatory': mandatory,
# comment-style decoration
'comment': comment,
# debug
'type_debug': lambda o: o.__class__.__name__,
# Data structures
'combine': combine,
'extract': extract,
'flatten': flatten,
'dict2items': dict_to_list_of_dict_key_value_elements,
'items2dict': list_of_dict_key_value_elements_to_dict,
'subelements': subelements,
'split': partial(unicode_wrap, text_type.split),
}