mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-26 23:00:36 +00:00
710 lines
26 KiB
Python
710 lines
26 KiB
Python
|
|
||
|
|
__all__ = [
|
||
|
|
'BaseConstructor',
|
||
|
|
'SafeConstructor',
|
||
|
|
'FullConstructor',
|
||
|
|
'UnsafeConstructor',
|
||
|
|
'Constructor',
|
||
|
|
'ConstructorError'
|
||
|
|
]
|
||
|
|
|
||
|
|
from error import *
|
||
|
|
from nodes import *
|
||
|
|
|
||
|
|
import datetime
|
||
|
|
|
||
|
|
import binascii, re, sys, types
|
||
|
|
|
||
|
|
class ConstructorError(MarkedYAMLError):
|
||
|
|
pass
|
||
|
|
|
||
|
|
class BaseConstructor(object):
|
||
|
|
|
||
|
|
yaml_constructors = {}
|
||
|
|
yaml_multi_constructors = {}
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
self.constructed_objects = {}
|
||
|
|
self.recursive_objects = {}
|
||
|
|
self.state_generators = []
|
||
|
|
self.deep_construct = False
|
||
|
|
|
||
|
|
def check_data(self):
|
||
|
|
# If there are more documents available?
|
||
|
|
return self.check_node()
|
||
|
|
|
||
|
|
def get_data(self):
|
||
|
|
# Construct and return the next document.
|
||
|
|
if self.check_node():
|
||
|
|
return self.construct_document(self.get_node())
|
||
|
|
|
||
|
|
def get_single_data(self):
|
||
|
|
# Ensure that the stream contains a single document and construct it.
|
||
|
|
node = self.get_single_node()
|
||
|
|
if node is not None:
|
||
|
|
return self.construct_document(node)
|
||
|
|
return None
|
||
|
|
|
||
|
|
def construct_document(self, node):
|
||
|
|
data = self.construct_object(node)
|
||
|
|
while self.state_generators:
|
||
|
|
state_generators = self.state_generators
|
||
|
|
self.state_generators = []
|
||
|
|
for generator in state_generators:
|
||
|
|
for dummy in generator:
|
||
|
|
pass
|
||
|
|
self.constructed_objects = {}
|
||
|
|
self.recursive_objects = {}
|
||
|
|
self.deep_construct = False
|
||
|
|
return data
|
||
|
|
|
||
|
|
def construct_object(self, node, deep=False):
|
||
|
|
if node in self.constructed_objects:
|
||
|
|
return self.constructed_objects[node]
|
||
|
|
if deep:
|
||
|
|
old_deep = self.deep_construct
|
||
|
|
self.deep_construct = True
|
||
|
|
if node in self.recursive_objects:
|
||
|
|
raise ConstructorError(None, None,
|
||
|
|
"found unconstructable recursive node", node.start_mark)
|
||
|
|
self.recursive_objects[node] = None
|
||
|
|
constructor = None
|
||
|
|
tag_suffix = None
|
||
|
|
if node.tag in self.yaml_constructors:
|
||
|
|
constructor = self.yaml_constructors[node.tag]
|
||
|
|
else:
|
||
|
|
for tag_prefix in self.yaml_multi_constructors:
|
||
|
|
if node.tag.startswith(tag_prefix):
|
||
|
|
tag_suffix = node.tag[len(tag_prefix):]
|
||
|
|
constructor = self.yaml_multi_constructors[tag_prefix]
|
||
|
|
break
|
||
|
|
else:
|
||
|
|
if None in self.yaml_multi_constructors:
|
||
|
|
tag_suffix = node.tag
|
||
|
|
constructor = self.yaml_multi_constructors[None]
|
||
|
|
elif None in self.yaml_constructors:
|
||
|
|
constructor = self.yaml_constructors[None]
|
||
|
|
elif isinstance(node, ScalarNode):
|
||
|
|
constructor = self.__class__.construct_scalar
|
||
|
|
elif isinstance(node, SequenceNode):
|
||
|
|
constructor = self.__class__.construct_sequence
|
||
|
|
elif isinstance(node, MappingNode):
|
||
|
|
constructor = self.__class__.construct_mapping
|
||
|
|
if tag_suffix is None:
|
||
|
|
data = constructor(self, node)
|
||
|
|
else:
|
||
|
|
data = constructor(self, tag_suffix, node)
|
||
|
|
if isinstance(data, types.GeneratorType):
|
||
|
|
generator = data
|
||
|
|
data = generator.next()
|
||
|
|
if self.deep_construct:
|
||
|
|
for dummy in generator:
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
self.state_generators.append(generator)
|
||
|
|
self.constructed_objects[node] = data
|
||
|
|
del self.recursive_objects[node]
|
||
|
|
if deep:
|
||
|
|
self.deep_construct = old_deep
|
||
|
|
return data
|
||
|
|
|
||
|
|
def construct_scalar(self, node):
|
||
|
|
if not isinstance(node, ScalarNode):
|
||
|
|
raise ConstructorError(None, None,
|
||
|
|
"expected a scalar node, but found %s" % node.id,
|
||
|
|
node.start_mark)
|
||
|
|
return node.value
|
||
|
|
|
||
|
|
def construct_sequence(self, node, deep=False):
|
||
|
|
if not isinstance(node, SequenceNode):
|
||
|
|
raise ConstructorError(None, None,
|
||
|
|
"expected a sequence node, but found %s" % node.id,
|
||
|
|
node.start_mark)
|
||
|
|
return [self.construct_object(child, deep=deep)
|
||
|
|
for child in node.value]
|
||
|
|
|
||
|
|
def construct_mapping(self, node, deep=False):
|
||
|
|
if not isinstance(node, MappingNode):
|
||
|
|
raise ConstructorError(None, None,
|
||
|
|
"expected a mapping node, but found %s" % node.id,
|
||
|
|
node.start_mark)
|
||
|
|
mapping = {}
|
||
|
|
for key_node, value_node in node.value:
|
||
|
|
key = self.construct_object(key_node, deep=deep)
|
||
|
|
try:
|
||
|
|
hash(key)
|
||
|
|
except TypeError, exc:
|
||
|
|
raise ConstructorError("while constructing a mapping", node.start_mark,
|
||
|
|
"found unacceptable key (%s)" % exc, key_node.start_mark)
|
||
|
|
value = self.construct_object(value_node, deep=deep)
|
||
|
|
mapping[key] = value
|
||
|
|
return mapping
|
||
|
|
|
||
|
|
def construct_pairs(self, node, deep=False):
|
||
|
|
if not isinstance(node, MappingNode):
|
||
|
|
raise ConstructorError(None, None,
|
||
|
|
"expected a mapping node, but found %s" % node.id,
|
||
|
|
node.start_mark)
|
||
|
|
pairs = []
|
||
|
|
for key_node, value_node in node.value:
|
||
|
|
key = self.construct_object(key_node, deep=deep)
|
||
|
|
value = self.construct_object(value_node, deep=deep)
|
||
|
|
pairs.append((key, value))
|
||
|
|
return pairs
|
||
|
|
|
||
|
|
def add_constructor(cls, tag, constructor):
|
||
|
|
if not 'yaml_constructors' in cls.__dict__:
|
||
|
|
cls.yaml_constructors = cls.yaml_constructors.copy()
|
||
|
|
cls.yaml_constructors[tag] = constructor
|
||
|
|
add_constructor = classmethod(add_constructor)
|
||
|
|
|
||
|
|
def add_multi_constructor(cls, tag_prefix, multi_constructor):
|
||
|
|
if not 'yaml_multi_constructors' in cls.__dict__:
|
||
|
|
cls.yaml_multi_constructors = cls.yaml_multi_constructors.copy()
|
||
|
|
cls.yaml_multi_constructors[tag_prefix] = multi_constructor
|
||
|
|
add_multi_constructor = classmethod(add_multi_constructor)
|
||
|
|
|
||
|
|
class SafeConstructor(BaseConstructor):
|
||
|
|
|
||
|
|
def construct_scalar(self, node):
|
||
|
|
if isinstance(node, MappingNode):
|
||
|
|
for key_node, value_node in node.value:
|
||
|
|
if key_node.tag == u'tag:yaml.org,2002:value':
|
||
|
|
return self.construct_scalar(value_node)
|
||
|
|
return BaseConstructor.construct_scalar(self, node)
|
||
|
|
|
||
|
|
def flatten_mapping(self, node):
|
||
|
|
merge = []
|
||
|
|
index = 0
|
||
|
|
while index < len(node.value):
|
||
|
|
key_node, value_node = node.value[index]
|
||
|
|
if key_node.tag == u'tag:yaml.org,2002:merge':
|
||
|
|
del node.value[index]
|
||
|
|
if isinstance(value_node, MappingNode):
|
||
|
|
self.flatten_mapping(value_node)
|
||
|
|
merge.extend(value_node.value)
|
||
|
|
elif isinstance(value_node, SequenceNode):
|
||
|
|
submerge = []
|
||
|
|
for subnode in value_node.value:
|
||
|
|
if not isinstance(subnode, MappingNode):
|
||
|
|
raise ConstructorError("while constructing a mapping",
|
||
|
|
node.start_mark,
|
||
|
|
"expected a mapping for merging, but found %s"
|
||
|
|
% subnode.id, subnode.start_mark)
|
||
|
|
self.flatten_mapping(subnode)
|
||
|
|
submerge.append(subnode.value)
|
||
|
|
submerge.reverse()
|
||
|
|
for value in submerge:
|
||
|
|
merge.extend(value)
|
||
|
|
else:
|
||
|
|
raise ConstructorError("while constructing a mapping", node.start_mark,
|
||
|
|
"expected a mapping or list of mappings for merging, but found %s"
|
||
|
|
% value_node.id, value_node.start_mark)
|
||
|
|
elif key_node.tag == u'tag:yaml.org,2002:value':
|
||
|
|
key_node.tag = u'tag:yaml.org,2002:str'
|
||
|
|
index += 1
|
||
|
|
else:
|
||
|
|
index += 1
|
||
|
|
if merge:
|
||
|
|
node.value = merge + node.value
|
||
|
|
|
||
|
|
def construct_mapping(self, node, deep=False):
|
||
|
|
if isinstance(node, MappingNode):
|
||
|
|
self.flatten_mapping(node)
|
||
|
|
return BaseConstructor.construct_mapping(self, node, deep=deep)
|
||
|
|
|
||
|
|
def construct_yaml_null(self, node):
|
||
|
|
self.construct_scalar(node)
|
||
|
|
return None
|
||
|
|
|
||
|
|
bool_values = {
|
||
|
|
u'yes': True,
|
||
|
|
u'no': False,
|
||
|
|
u'true': True,
|
||
|
|
u'false': False,
|
||
|
|
u'on': True,
|
||
|
|
u'off': False,
|
||
|
|
}
|
||
|
|
|
||
|
|
def construct_yaml_bool(self, node):
|
||
|
|
value = self.construct_scalar(node)
|
||
|
|
return self.bool_values[value.lower()]
|
||
|
|
|
||
|
|
def construct_yaml_int(self, node):
|
||
|
|
value = str(self.construct_scalar(node))
|
||
|
|
value = value.replace('_', '')
|
||
|
|
sign = +1
|
||
|
|
if value[0] == '-':
|
||
|
|
sign = -1
|
||
|
|
if value[0] in '+-':
|
||
|
|
value = value[1:]
|
||
|
|
if value == '0':
|
||
|
|
return 0
|
||
|
|
elif value.startswith('0b'):
|
||
|
|
return sign*int(value[2:], 2)
|
||
|
|
elif value.startswith('0x'):
|
||
|
|
return sign*int(value[2:], 16)
|
||
|
|
elif value[0] == '0':
|
||
|
|
return sign*int(value, 8)
|
||
|
|
elif ':' in value:
|
||
|
|
digits = [int(part) for part in value.split(':')]
|
||
|
|
digits.reverse()
|
||
|
|
base = 1
|
||
|
|
value = 0
|
||
|
|
for digit in digits:
|
||
|
|
value += digit*base
|
||
|
|
base *= 60
|
||
|
|
return sign*value
|
||
|
|
else:
|
||
|
|
return sign*int(value)
|
||
|
|
|
||
|
|
inf_value = 1e300
|
||
|
|
while inf_value != inf_value*inf_value:
|
||
|
|
inf_value *= inf_value
|
||
|
|
nan_value = -inf_value/inf_value # Trying to make a quiet NaN (like C99).
|
||
|
|
|
||
|
|
def construct_yaml_float(self, node):
|
||
|
|
value = str(self.construct_scalar(node))
|
||
|
|
value = value.replace('_', '').lower()
|
||
|
|
sign = +1
|
||
|
|
if value[0] == '-':
|
||
|
|
sign = -1
|
||
|
|
if value[0] in '+-':
|
||
|
|
value = value[1:]
|
||
|
|
if value == '.inf':
|
||
|
|
return sign*self.inf_value
|
||
|
|
elif value == '.nan':
|
||
|
|
return self.nan_value
|
||
|
|
elif ':' in value:
|
||
|
|
digits = [float(part) for part in value.split(':')]
|
||
|
|
digits.reverse()
|
||
|
|
base = 1
|
||
|
|
value = 0.0
|
||
|
|
for digit in digits:
|
||
|
|
value += digit*base
|
||
|
|
base *= 60
|
||
|
|
return sign*value
|
||
|
|
else:
|
||
|
|
return sign*float(value)
|
||
|
|
|
||
|
|
def construct_yaml_binary(self, node):
|
||
|
|
value = self.construct_scalar(node)
|
||
|
|
try:
|
||
|
|
return str(value).decode('base64')
|
||
|
|
except (binascii.Error, UnicodeEncodeError), exc:
|
||
|
|
raise ConstructorError(None, None,
|
||
|
|
"failed to decode base64 data: %s" % exc, node.start_mark)
|
||
|
|
|
||
|
|
timestamp_regexp = re.compile(
|
||
|
|
ur'''^(?P<year>[0-9][0-9][0-9][0-9])
|
||
|
|
-(?P<month>[0-9][0-9]?)
|
||
|
|
-(?P<day>[0-9][0-9]?)
|
||
|
|
(?:(?:[Tt]|[ \t]+)
|
||
|
|
(?P<hour>[0-9][0-9]?)
|
||
|
|
:(?P<minute>[0-9][0-9])
|
||
|
|
:(?P<second>[0-9][0-9])
|
||
|
|
(?:\.(?P<fraction>[0-9]*))?
|
||
|
|
(?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
|
||
|
|
(?::(?P<tz_minute>[0-9][0-9]))?))?)?$''', re.X)
|
||
|
|
|
||
|
|
def construct_yaml_timestamp(self, node):
|
||
|
|
value = self.construct_scalar(node)
|
||
|
|
match = self.timestamp_regexp.match(node.value)
|
||
|
|
values = match.groupdict()
|
||
|
|
year = int(values['year'])
|
||
|
|
month = int(values['month'])
|
||
|
|
day = int(values['day'])
|
||
|
|
if not values['hour']:
|
||
|
|
return datetime.date(year, month, day)
|
||
|
|
hour = int(values['hour'])
|
||
|
|
minute = int(values['minute'])
|
||
|
|
second = int(values['second'])
|
||
|
|
fraction = 0
|
||
|
|
if values['fraction']:
|
||
|
|
fraction = values['fraction'][:6]
|
||
|
|
while len(fraction) < 6:
|
||
|
|
fraction += '0'
|
||
|
|
fraction = int(fraction)
|
||
|
|
delta = None
|
||
|
|
if values['tz_sign']:
|
||
|
|
tz_hour = int(values['tz_hour'])
|
||
|
|
tz_minute = int(values['tz_minute'] or 0)
|
||
|
|
delta = datetime.timedelta(hours=tz_hour, minutes=tz_minute)
|
||
|
|
if values['tz_sign'] == '-':
|
||
|
|
delta = -delta
|
||
|
|
data = datetime.datetime(year, month, day, hour, minute, second, fraction)
|
||
|
|
if delta:
|
||
|
|
data -= delta
|
||
|
|
return data
|
||
|
|
|
||
|
|
def construct_yaml_omap(self, node):
|
||
|
|
# Note: we do not check for duplicate keys, because it's too
|
||
|
|
# CPU-expensive.
|
||
|
|
omap = []
|
||
|
|
yield omap
|
||
|
|
if not isinstance(node, SequenceNode):
|
||
|
|
raise ConstructorError("while constructing an ordered map", node.start_mark,
|
||
|
|
"expected a sequence, but found %s" % node.id, node.start_mark)
|
||
|
|
for subnode in node.value:
|
||
|
|
if not isinstance(subnode, MappingNode):
|
||
|
|
raise ConstructorError("while constructing an ordered map", node.start_mark,
|
||
|
|
"expected a mapping of length 1, but found %s" % subnode.id,
|
||
|
|
subnode.start_mark)
|
||
|
|
if len(subnode.value) != 1:
|
||
|
|
raise ConstructorError("while constructing an ordered map", node.start_mark,
|
||
|
|
"expected a single mapping item, but found %d items" % len(subnode.value),
|
||
|
|
subnode.start_mark)
|
||
|
|
key_node, value_node = subnode.value[0]
|
||
|
|
key = self.construct_object(key_node)
|
||
|
|
value = self.construct_object(value_node)
|
||
|
|
omap.append((key, value))
|
||
|
|
|
||
|
|
def construct_yaml_pairs(self, node):
|
||
|
|
# Note: the same code as `construct_yaml_omap`.
|
||
|
|
pairs = []
|
||
|
|
yield pairs
|
||
|
|
if not isinstance(node, SequenceNode):
|
||
|
|
raise ConstructorError("while constructing pairs", node.start_mark,
|
||
|
|
"expected a sequence, but found %s" % node.id, node.start_mark)
|
||
|
|
for subnode in node.value:
|
||
|
|
if not isinstance(subnode, MappingNode):
|
||
|
|
raise ConstructorError("while constructing pairs", node.start_mark,
|
||
|
|
"expected a mapping of length 1, but found %s" % subnode.id,
|
||
|
|
subnode.start_mark)
|
||
|
|
if len(subnode.value) != 1:
|
||
|
|
raise ConstructorError("while constructing pairs", node.start_mark,
|
||
|
|
"expected a single mapping item, but found %d items" % len(subnode.value),
|
||
|
|
subnode.start_mark)
|
||
|
|
key_node, value_node = subnode.value[0]
|
||
|
|
key = self.construct_object(key_node)
|
||
|
|
value = self.construct_object(value_node)
|
||
|
|
pairs.append((key, value))
|
||
|
|
|
||
|
|
def construct_yaml_set(self, node):
|
||
|
|
data = set()
|
||
|
|
yield data
|
||
|
|
value = self.construct_mapping(node)
|
||
|
|
data.update(value)
|
||
|
|
|
||
|
|
def construct_yaml_str(self, node):
|
||
|
|
value = self.construct_scalar(node)
|
||
|
|
try:
|
||
|
|
return value.encode('ascii')
|
||
|
|
except UnicodeEncodeError:
|
||
|
|
return value
|
||
|
|
|
||
|
|
def construct_yaml_seq(self, node):
|
||
|
|
data = []
|
||
|
|
yield data
|
||
|
|
data.extend(self.construct_sequence(node))
|
||
|
|
|
||
|
|
def construct_yaml_map(self, node):
|
||
|
|
data = {}
|
||
|
|
yield data
|
||
|
|
value = self.construct_mapping(node)
|
||
|
|
data.update(value)
|
||
|
|
|
||
|
|
def construct_yaml_object(self, node, cls):
|
||
|
|
data = cls.__new__(cls)
|
||
|
|
yield data
|
||
|
|
if hasattr(data, '__setstate__'):
|
||
|
|
state = self.construct_mapping(node, deep=True)
|
||
|
|
data.__setstate__(state)
|
||
|
|
else:
|
||
|
|
state = self.construct_mapping(node)
|
||
|
|
data.__dict__.update(state)
|
||
|
|
|
||
|
|
def construct_undefined(self, node):
|
||
|
|
raise ConstructorError(None, None,
|
||
|
|
"could not determine a constructor for the tag %r" % node.tag.encode('utf-8'),
|
||
|
|
node.start_mark)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:null',
|
||
|
|
SafeConstructor.construct_yaml_null)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:bool',
|
||
|
|
SafeConstructor.construct_yaml_bool)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:int',
|
||
|
|
SafeConstructor.construct_yaml_int)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:float',
|
||
|
|
SafeConstructor.construct_yaml_float)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:binary',
|
||
|
|
SafeConstructor.construct_yaml_binary)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:timestamp',
|
||
|
|
SafeConstructor.construct_yaml_timestamp)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:omap',
|
||
|
|
SafeConstructor.construct_yaml_omap)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:pairs',
|
||
|
|
SafeConstructor.construct_yaml_pairs)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:set',
|
||
|
|
SafeConstructor.construct_yaml_set)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:str',
|
||
|
|
SafeConstructor.construct_yaml_str)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:seq',
|
||
|
|
SafeConstructor.construct_yaml_seq)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:map',
|
||
|
|
SafeConstructor.construct_yaml_map)
|
||
|
|
|
||
|
|
SafeConstructor.add_constructor(None,
|
||
|
|
SafeConstructor.construct_undefined)
|
||
|
|
|
||
|
|
class FullConstructor(SafeConstructor):
|
||
|
|
|
||
|
|
def construct_python_str(self, node):
|
||
|
|
return self.construct_scalar(node).encode('utf-8')
|
||
|
|
|
||
|
|
def construct_python_unicode(self, node):
|
||
|
|
return self.construct_scalar(node)
|
||
|
|
|
||
|
|
def construct_python_long(self, node):
|
||
|
|
return long(self.construct_yaml_int(node))
|
||
|
|
|
||
|
|
def construct_python_complex(self, node):
|
||
|
|
return complex(self.construct_scalar(node))
|
||
|
|
|
||
|
|
def construct_python_tuple(self, node):
|
||
|
|
return tuple(self.construct_sequence(node))
|
||
|
|
|
||
|
|
def find_python_module(self, name, mark, unsafe=False):
|
||
|
|
if not name:
|
||
|
|
raise ConstructorError("while constructing a Python module", mark,
|
||
|
|
"expected non-empty name appended to the tag", mark)
|
||
|
|
if unsafe:
|
||
|
|
try:
|
||
|
|
__import__(name)
|
||
|
|
except ImportError, exc:
|
||
|
|
raise ConstructorError("while constructing a Python module", mark,
|
||
|
|
"cannot find module %r (%s)" % (name.encode('utf-8'), exc), mark)
|
||
|
|
if not name in sys.modules:
|
||
|
|
raise ConstructorError("while constructing a Python module", mark,
|
||
|
|
"module %r is not imported" % name.encode('utf-8'), mark)
|
||
|
|
return sys.modules[name]
|
||
|
|
|
||
|
|
def find_python_name(self, name, mark, unsafe=False):
|
||
|
|
if not name:
|
||
|
|
raise ConstructorError("while constructing a Python object", mark,
|
||
|
|
"expected non-empty name appended to the tag", mark)
|
||
|
|
if u'.' in name:
|
||
|
|
module_name, object_name = name.rsplit('.', 1)
|
||
|
|
else:
|
||
|
|
module_name = '__builtin__'
|
||
|
|
object_name = name
|
||
|
|
if unsafe:
|
||
|
|
try:
|
||
|
|
__import__(module_name)
|
||
|
|
except ImportError, exc:
|
||
|
|
raise ConstructorError("while constructing a Python object", mark,
|
||
|
|
"cannot find module %r (%s)" % (module_name.encode('utf-8'), exc), mark)
|
||
|
|
if not module_name in sys.modules:
|
||
|
|
raise ConstructorError("while constructing a Python object", mark,
|
||
|
|
"module %r is not imported" % module_name.encode('utf-8'), mark)
|
||
|
|
module = sys.modules[module_name]
|
||
|
|
if not hasattr(module, object_name):
|
||
|
|
raise ConstructorError("while constructing a Python object", mark,
|
||
|
|
"cannot find %r in the module %r" % (object_name.encode('utf-8'),
|
||
|
|
module.__name__), mark)
|
||
|
|
return getattr(module, object_name)
|
||
|
|
|
||
|
|
def construct_python_name(self, suffix, node):
|
||
|
|
value = self.construct_scalar(node)
|
||
|
|
if value:
|
||
|
|
raise ConstructorError("while constructing a Python name", node.start_mark,
|
||
|
|
"expected the empty value, but found %r" % value.encode('utf-8'),
|
||
|
|
node.start_mark)
|
||
|
|
return self.find_python_name(suffix, node.start_mark)
|
||
|
|
|
||
|
|
def construct_python_module(self, suffix, node):
|
||
|
|
value = self.construct_scalar(node)
|
||
|
|
if value:
|
||
|
|
raise ConstructorError("while constructing a Python module", node.start_mark,
|
||
|
|
"expected the empty value, but found %r" % value.encode('utf-8'),
|
||
|
|
node.start_mark)
|
||
|
|
return self.find_python_module(suffix, node.start_mark)
|
||
|
|
|
||
|
|
class classobj: pass
|
||
|
|
|
||
|
|
def make_python_instance(self, suffix, node,
|
||
|
|
args=None, kwds=None, newobj=False, unsafe=False):
|
||
|
|
if not args:
|
||
|
|
args = []
|
||
|
|
if not kwds:
|
||
|
|
kwds = {}
|
||
|
|
cls = self.find_python_name(suffix, node.start_mark)
|
||
|
|
if not (unsafe or isinstance(cls, type) or isinstance(cls, type(self.classobj))):
|
||
|
|
raise ConstructorError("while constructing a Python instance", node.start_mark,
|
||
|
|
"expected a class, but found %r" % type(cls),
|
||
|
|
node.start_mark)
|
||
|
|
if newobj and isinstance(cls, type(self.classobj)) \
|
||
|
|
and not args and not kwds:
|
||
|
|
instance = self.classobj()
|
||
|
|
instance.__class__ = cls
|
||
|
|
return instance
|
||
|
|
elif newobj and isinstance(cls, type):
|
||
|
|
return cls.__new__(cls, *args, **kwds)
|
||
|
|
else:
|
||
|
|
return cls(*args, **kwds)
|
||
|
|
|
||
|
|
def set_python_instance_state(self, instance, state):
|
||
|
|
if hasattr(instance, '__setstate__'):
|
||
|
|
instance.__setstate__(state)
|
||
|
|
else:
|
||
|
|
slotstate = {}
|
||
|
|
if isinstance(state, tuple) and len(state) == 2:
|
||
|
|
state, slotstate = state
|
||
|
|
if hasattr(instance, '__dict__'):
|
||
|
|
instance.__dict__.update(state)
|
||
|
|
elif state:
|
||
|
|
slotstate.update(state)
|
||
|
|
for key, value in slotstate.items():
|
||
|
|
setattr(object, key, value)
|
||
|
|
|
||
|
|
def construct_python_object(self, suffix, node):
|
||
|
|
# Format:
|
||
|
|
# !!python/object:module.name { ... state ... }
|
||
|
|
instance = self.make_python_instance(suffix, node, newobj=True)
|
||
|
|
yield instance
|
||
|
|
deep = hasattr(instance, '__setstate__')
|
||
|
|
state = self.construct_mapping(node, deep=deep)
|
||
|
|
self.set_python_instance_state(instance, state)
|
||
|
|
|
||
|
|
def construct_python_object_apply(self, suffix, node, newobj=False):
|
||
|
|
# Format:
|
||
|
|
# !!python/object/apply # (or !!python/object/new)
|
||
|
|
# args: [ ... arguments ... ]
|
||
|
|
# kwds: { ... keywords ... }
|
||
|
|
# state: ... state ...
|
||
|
|
# listitems: [ ... listitems ... ]
|
||
|
|
# dictitems: { ... dictitems ... }
|
||
|
|
# or short format:
|
||
|
|
# !!python/object/apply [ ... arguments ... ]
|
||
|
|
# The difference between !!python/object/apply and !!python/object/new
|
||
|
|
# is how an object is created, check make_python_instance for details.
|
||
|
|
if isinstance(node, SequenceNode):
|
||
|
|
args = self.construct_sequence(node, deep=True)
|
||
|
|
kwds = {}
|
||
|
|
state = {}
|
||
|
|
listitems = []
|
||
|
|
dictitems = {}
|
||
|
|
else:
|
||
|
|
value = self.construct_mapping(node, deep=True)
|
||
|
|
args = value.get('args', [])
|
||
|
|
kwds = value.get('kwds', {})
|
||
|
|
state = value.get('state', {})
|
||
|
|
listitems = value.get('listitems', [])
|
||
|
|
dictitems = value.get('dictitems', {})
|
||
|
|
instance = self.make_python_instance(suffix, node, args, kwds, newobj)
|
||
|
|
if state:
|
||
|
|
self.set_python_instance_state(instance, state)
|
||
|
|
if listitems:
|
||
|
|
instance.extend(listitems)
|
||
|
|
if dictitems:
|
||
|
|
for key in dictitems:
|
||
|
|
instance[key] = dictitems[key]
|
||
|
|
return instance
|
||
|
|
|
||
|
|
def construct_python_object_new(self, suffix, node):
|
||
|
|
return self.construct_python_object_apply(suffix, node, newobj=True)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/none',
|
||
|
|
FullConstructor.construct_yaml_null)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/bool',
|
||
|
|
FullConstructor.construct_yaml_bool)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/str',
|
||
|
|
FullConstructor.construct_python_str)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/unicode',
|
||
|
|
FullConstructor.construct_python_unicode)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/int',
|
||
|
|
FullConstructor.construct_yaml_int)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/long',
|
||
|
|
FullConstructor.construct_python_long)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/float',
|
||
|
|
FullConstructor.construct_yaml_float)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/complex',
|
||
|
|
FullConstructor.construct_python_complex)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/list',
|
||
|
|
FullConstructor.construct_yaml_seq)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/tuple',
|
||
|
|
FullConstructor.construct_python_tuple)
|
||
|
|
|
||
|
|
FullConstructor.add_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/dict',
|
||
|
|
FullConstructor.construct_yaml_map)
|
||
|
|
|
||
|
|
FullConstructor.add_multi_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/name:',
|
||
|
|
FullConstructor.construct_python_name)
|
||
|
|
|
||
|
|
FullConstructor.add_multi_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/module:',
|
||
|
|
FullConstructor.construct_python_module)
|
||
|
|
|
||
|
|
FullConstructor.add_multi_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/object:',
|
||
|
|
FullConstructor.construct_python_object)
|
||
|
|
|
||
|
|
FullConstructor.add_multi_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/object/apply:',
|
||
|
|
FullConstructor.construct_python_object_apply)
|
||
|
|
|
||
|
|
FullConstructor.add_multi_constructor(
|
||
|
|
u'tag:yaml.org,2002:python/object/new:',
|
||
|
|
FullConstructor.construct_python_object_new)
|
||
|
|
|
||
|
|
class UnsafeConstructor(FullConstructor):
|
||
|
|
|
||
|
|
def find_python_module(self, name, mark):
|
||
|
|
return super(UnsafeConstructor, self).find_python_module(name, mark, unsafe=True)
|
||
|
|
|
||
|
|
def find_python_name(self, name, mark):
|
||
|
|
return super(UnsafeConstructor, self).find_python_name(name, mark, unsafe=True)
|
||
|
|
|
||
|
|
def make_python_instance(self, suffix, node, args=None, kwds=None, newobj=False):
|
||
|
|
return super(UnsafeConstructor, self).make_python_instance(
|
||
|
|
suffix, node, args, kwds, newobj, unsafe=True)
|
||
|
|
|
||
|
|
# Constructor is same as UnsafeConstructor. Need to leave this in place in case
|
||
|
|
# people have extended it directly.
|
||
|
|
class Constructor(UnsafeConstructor):
|
||
|
|
pass
|