diff options
Diffstat (limited to 'libs/dynaconf/vendor/ruamel/yaml/main.py')
| -rw-r--r-- | libs/dynaconf/vendor/ruamel/yaml/main.py | 1534 |
1 files changed, 1534 insertions, 0 deletions
diff --git a/libs/dynaconf/vendor/ruamel/yaml/main.py b/libs/dynaconf/vendor/ruamel/yaml/main.py new file mode 100644 index 000000000..702333142 --- /dev/null +++ b/libs/dynaconf/vendor/ruamel/yaml/main.py @@ -0,0 +1,1534 @@ +# coding: utf-8 + +from __future__ import absolute_import, unicode_literals, print_function + +import sys +import os +import warnings +import glob +from importlib import import_module + + +import dynaconf.vendor.ruamel as ruamel +from .error import UnsafeLoaderWarning, YAMLError # NOQA + +from .tokens import * # NOQA +from .events import * # NOQA +from .nodes import * # NOQA + +from .loader import BaseLoader, SafeLoader, Loader, RoundTripLoader # NOQA +from .dumper import BaseDumper, SafeDumper, Dumper, RoundTripDumper # NOQA +from .compat import StringIO, BytesIO, with_metaclass, PY3, nprint +from .resolver import VersionedResolver, Resolver # NOQA +from .representer import ( + BaseRepresenter, + SafeRepresenter, + Representer, + RoundTripRepresenter, +) +from .constructor import ( + BaseConstructor, + SafeConstructor, + Constructor, + RoundTripConstructor, +) +from .loader import Loader as UnsafeLoader + +if False: # MYPY + from typing import List, Set, Dict, Union, Any, Callable, Optional, Text # NOQA + from .compat import StreamType, StreamTextType, VersionType # NOQA + + if PY3: + from pathlib import Path + else: + Path = Any + +try: + from _ruamel_yaml import CParser, CEmitter # type: ignore +except: # NOQA + CParser = CEmitter = None + +# import io + +enforce = object() + + +# YAML is an acronym, i.e. spoken: rhymes with "camel". And thus a +# subset of abbreviations, which should be all caps according to PEP8 + + +class YAML(object): + def __init__( + self, _kw=enforce, typ=None, pure=False, output=None, plug_ins=None # input=None, + ): + # type: (Any, Optional[Text], Any, Any, Any) -> None + """ + _kw: not used, forces keyword arguments in 2.7 (in 3 you can do (*, safe_load=..) + typ: 'rt'/None -> RoundTripLoader/RoundTripDumper, (default) + 'safe' -> SafeLoader/SafeDumper, + 'unsafe' -> normal/unsafe Loader/Dumper + 'base' -> baseloader + pure: if True only use Python modules + input/output: needed to work as context manager + plug_ins: a list of plug-in files + """ + if _kw is not enforce: + raise TypeError( + '{}.__init__() takes no positional argument but at least ' + 'one was given ({!r})'.format(self.__class__.__name__, _kw) + ) + + self.typ = ['rt'] if typ is None else (typ if isinstance(typ, list) else [typ]) + self.pure = pure + + # self._input = input + self._output = output + self._context_manager = None # type: Any + + self.plug_ins = [] # type: List[Any] + for pu in ([] if plug_ins is None else plug_ins) + self.official_plug_ins(): + file_name = pu.replace(os.sep, '.') + self.plug_ins.append(import_module(file_name)) + self.Resolver = ruamel.yaml.resolver.VersionedResolver # type: Any + self.allow_unicode = True + self.Reader = None # type: Any + self.Representer = None # type: Any + self.Constructor = None # type: Any + self.Scanner = None # type: Any + self.Serializer = None # type: Any + self.default_flow_style = None # type: Any + typ_found = 1 + setup_rt = False + if 'rt' in self.typ: + setup_rt = True + elif 'safe' in self.typ: + self.Emitter = ( + ruamel.yaml.emitter.Emitter if pure or CEmitter is None else CEmitter + ) + self.Representer = ruamel.yaml.representer.SafeRepresenter + self.Parser = ruamel.yaml.parser.Parser if pure or CParser is None else CParser + self.Composer = ruamel.yaml.composer.Composer + self.Constructor = ruamel.yaml.constructor.SafeConstructor + elif 'base' in self.typ: + self.Emitter = ruamel.yaml.emitter.Emitter + self.Representer = ruamel.yaml.representer.BaseRepresenter + self.Parser = ruamel.yaml.parser.Parser if pure or CParser is None else CParser + self.Composer = ruamel.yaml.composer.Composer + self.Constructor = ruamel.yaml.constructor.BaseConstructor + elif 'unsafe' in self.typ: + self.Emitter = ( + ruamel.yaml.emitter.Emitter if pure or CEmitter is None else CEmitter + ) + self.Representer = ruamel.yaml.representer.Representer + self.Parser = ruamel.yaml.parser.Parser if pure or CParser is None else CParser + self.Composer = ruamel.yaml.composer.Composer + self.Constructor = ruamel.yaml.constructor.Constructor + else: + setup_rt = True + typ_found = 0 + if setup_rt: + self.default_flow_style = False + # no optimized rt-dumper yet + self.Emitter = ruamel.yaml.emitter.Emitter + self.Serializer = ruamel.yaml.serializer.Serializer + self.Representer = ruamel.yaml.representer.RoundTripRepresenter + self.Scanner = ruamel.yaml.scanner.RoundTripScanner + # no optimized rt-parser yet + self.Parser = ruamel.yaml.parser.RoundTripParser + self.Composer = ruamel.yaml.composer.Composer + self.Constructor = ruamel.yaml.constructor.RoundTripConstructor + del setup_rt + self.stream = None + self.canonical = None + self.old_indent = None + self.width = None + self.line_break = None + + self.map_indent = None + self.sequence_indent = None + self.sequence_dash_offset = 0 + self.compact_seq_seq = None + self.compact_seq_map = None + self.sort_base_mapping_type_on_output = None # default: sort + + self.top_level_colon_align = None + self.prefix_colon = None + self.version = None + self.preserve_quotes = None + self.allow_duplicate_keys = False # duplicate keys in map, set + self.encoding = 'utf-8' + self.explicit_start = None + self.explicit_end = None + self.tags = None + self.default_style = None + self.top_level_block_style_scalar_no_indent_error_1_1 = False + # directives end indicator with single scalar document + self.scalar_after_indicator = None + # [a, b: 1, c: {d: 2}] vs. [a, {b: 1}, {c: {d: 2}}] + self.brace_single_entry_mapping_in_flow_sequence = False + for module in self.plug_ins: + if getattr(module, 'typ', None) in self.typ: + typ_found += 1 + module.init_typ(self) + break + if typ_found == 0: + raise NotImplementedError( + 'typ "{}"not recognised (need to install plug-in?)'.format(self.typ) + ) + + @property + def reader(self): + # type: () -> Any + try: + return self._reader # type: ignore + except AttributeError: + self._reader = self.Reader(None, loader=self) + return self._reader + + @property + def scanner(self): + # type: () -> Any + try: + return self._scanner # type: ignore + except AttributeError: + self._scanner = self.Scanner(loader=self) + return self._scanner + + @property + def parser(self): + # type: () -> Any + attr = '_' + sys._getframe().f_code.co_name + if not hasattr(self, attr): + if self.Parser is not CParser: + setattr(self, attr, self.Parser(loader=self)) + else: + if getattr(self, '_stream', None) is None: + # wait for the stream + return None + else: + # if not hasattr(self._stream, 'read') and hasattr(self._stream, 'open'): + # # pathlib.Path() instance + # setattr(self, attr, CParser(self._stream)) + # else: + setattr(self, attr, CParser(self._stream)) + # self._parser = self._composer = self + # nprint('scanner', self.loader.scanner) + + return getattr(self, attr) + + @property + def composer(self): + # type: () -> Any + attr = '_' + sys._getframe().f_code.co_name + if not hasattr(self, attr): + setattr(self, attr, self.Composer(loader=self)) + return getattr(self, attr) + + @property + def constructor(self): + # type: () -> Any + attr = '_' + sys._getframe().f_code.co_name + if not hasattr(self, attr): + cnst = self.Constructor(preserve_quotes=self.preserve_quotes, loader=self) + cnst.allow_duplicate_keys = self.allow_duplicate_keys + setattr(self, attr, cnst) + return getattr(self, attr) + + @property + def resolver(self): + # type: () -> Any + attr = '_' + sys._getframe().f_code.co_name + if not hasattr(self, attr): + setattr(self, attr, self.Resolver(version=self.version, loader=self)) + return getattr(self, attr) + + @property + def emitter(self): + # type: () -> Any + attr = '_' + sys._getframe().f_code.co_name + if not hasattr(self, attr): + if self.Emitter is not CEmitter: + _emitter = self.Emitter( + None, + canonical=self.canonical, + indent=self.old_indent, + width=self.width, + allow_unicode=self.allow_unicode, + line_break=self.line_break, + prefix_colon=self.prefix_colon, + brace_single_entry_mapping_in_flow_sequence=self.brace_single_entry_mapping_in_flow_sequence, # NOQA + dumper=self, + ) + setattr(self, attr, _emitter) + if self.map_indent is not None: + _emitter.best_map_indent = self.map_indent + if self.sequence_indent is not None: + _emitter.best_sequence_indent = self.sequence_indent + if self.sequence_dash_offset is not None: + _emitter.sequence_dash_offset = self.sequence_dash_offset + # _emitter.block_seq_indent = self.sequence_dash_offset + if self.compact_seq_seq is not None: + _emitter.compact_seq_seq = self.compact_seq_seq + if self.compact_seq_map is not None: + _emitter.compact_seq_map = self.compact_seq_map + else: + if getattr(self, '_stream', None) is None: + # wait for the stream + return None + return None + return getattr(self, attr) + + @property + def serializer(self): + # type: () -> Any + attr = '_' + sys._getframe().f_code.co_name + if not hasattr(self, attr): + setattr( + self, + attr, + self.Serializer( + encoding=self.encoding, + explicit_start=self.explicit_start, + explicit_end=self.explicit_end, + version=self.version, + tags=self.tags, + dumper=self, + ), + ) + return getattr(self, attr) + + @property + def representer(self): + # type: () -> Any + attr = '_' + sys._getframe().f_code.co_name + if not hasattr(self, attr): + repres = self.Representer( + default_style=self.default_style, + default_flow_style=self.default_flow_style, + dumper=self, + ) + if self.sort_base_mapping_type_on_output is not None: + repres.sort_base_mapping_type_on_output = self.sort_base_mapping_type_on_output + setattr(self, attr, repres) + return getattr(self, attr) + + # separate output resolver? + + # def load(self, stream=None): + # if self._context_manager: + # if not self._input: + # raise TypeError("Missing input stream while dumping from context manager") + # for data in self._context_manager.load(): + # yield data + # return + # if stream is None: + # raise TypeError("Need a stream argument when not loading from context manager") + # return self.load_one(stream) + + def load(self, stream): + # type: (Union[Path, StreamTextType]) -> Any + """ + at this point you either have the non-pure Parser (which has its own reader and + scanner) or you have the pure Parser. + If the pure Parser is set, then set the Reader and Scanner, if not already set. + If either the Scanner or Reader are set, you cannot use the non-pure Parser, + so reset it to the pure parser and set the Reader resp. Scanner if necessary + """ + if not hasattr(stream, 'read') and hasattr(stream, 'open'): + # pathlib.Path() instance + with stream.open('rb') as fp: + return self.load(fp) + constructor, parser = self.get_constructor_parser(stream) + try: + return constructor.get_single_data() + finally: + parser.dispose() + try: + self._reader.reset_reader() + except AttributeError: + pass + try: + self._scanner.reset_scanner() + except AttributeError: + pass + + def load_all(self, stream, _kw=enforce): # , skip=None): + # type: (Union[Path, StreamTextType], Any) -> Any + if _kw is not enforce: + raise TypeError( + '{}.__init__() takes no positional argument but at least ' + 'one was given ({!r})'.format(self.__class__.__name__, _kw) + ) + if not hasattr(stream, 'read') and hasattr(stream, 'open'): + # pathlib.Path() instance + with stream.open('r') as fp: + for d in self.load_all(fp, _kw=enforce): + yield d + return + # if skip is None: + # skip = [] + # elif isinstance(skip, int): + # skip = [skip] + constructor, parser = self.get_constructor_parser(stream) + try: + while constructor.check_data(): + yield constructor.get_data() + finally: + parser.dispose() + try: + self._reader.reset_reader() + except AttributeError: + pass + try: + self._scanner.reset_scanner() + except AttributeError: + pass + + def get_constructor_parser(self, stream): + # type: (StreamTextType) -> Any + """ + the old cyaml needs special setup, and therefore the stream + """ + if self.Parser is not CParser: + if self.Reader is None: + self.Reader = ruamel.yaml.reader.Reader + if self.Scanner is None: + self.Scanner = ruamel.yaml.scanner.Scanner + self.reader.stream = stream + else: + if self.Reader is not None: + if self.Scanner is None: + self.Scanner = ruamel.yaml.scanner.Scanner + self.Parser = ruamel.yaml.parser.Parser + self.reader.stream = stream + elif self.Scanner is not None: + if self.Reader is None: + self.Reader = ruamel.yaml.reader.Reader + self.Parser = ruamel.yaml.parser.Parser + self.reader.stream = stream + else: + # combined C level reader>scanner>parser + # does some calls to the resolver, e.g. BaseResolver.descend_resolver + # if you just initialise the CParser, to much of resolver.py + # is actually used + rslvr = self.Resolver + # if rslvr is ruamel.yaml.resolver.VersionedResolver: + # rslvr = ruamel.yaml.resolver.Resolver + + class XLoader(self.Parser, self.Constructor, rslvr): # type: ignore + def __init__(selfx, stream, version=self.version, preserve_quotes=None): + # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> None # NOQA + CParser.__init__(selfx, stream) + selfx._parser = selfx._composer = selfx + self.Constructor.__init__(selfx, loader=selfx) + selfx.allow_duplicate_keys = self.allow_duplicate_keys + rslvr.__init__(selfx, version=version, loadumper=selfx) + + self._stream = stream + loader = XLoader(stream) + return loader, loader + return self.constructor, self.parser + + def dump(self, data, stream=None, _kw=enforce, transform=None): + # type: (Any, Union[Path, StreamType], Any, Any) -> Any + if self._context_manager: + if not self._output: + raise TypeError('Missing output stream while dumping from context manager') + if _kw is not enforce: + raise TypeError( + '{}.dump() takes one positional argument but at least ' + 'two were given ({!r})'.format(self.__class__.__name__, _kw) + ) + if transform is not None: + raise TypeError( + '{}.dump() in the context manager cannot have transform keyword ' + ''.format(self.__class__.__name__) + ) + self._context_manager.dump(data) + else: # old style + if stream is None: + raise TypeError('Need a stream argument when not dumping from context manager') + return self.dump_all([data], stream, _kw, transform=transform) + + def dump_all(self, documents, stream, _kw=enforce, transform=None): + # type: (Any, Union[Path, StreamType], Any, Any) -> Any + if self._context_manager: + raise NotImplementedError + if _kw is not enforce: + raise TypeError( + '{}.dump(_all) takes two positional argument but at least ' + 'three were given ({!r})'.format(self.__class__.__name__, _kw) + ) + self._output = stream + self._context_manager = YAMLContextManager(self, transform=transform) + for data in documents: + self._context_manager.dump(data) + self._context_manager.teardown_output() + self._output = None + self._context_manager = None + + def Xdump_all(self, documents, stream, _kw=enforce, transform=None): + # type: (Any, Union[Path, StreamType], Any, Any) -> Any + """ + Serialize a sequence of Python objects into a YAML stream. + """ + if not hasattr(stream, 'write') and hasattr(stream, 'open'): + # pathlib.Path() instance + with stream.open('w') as fp: + return self.dump_all(documents, fp, _kw, transform=transform) + if _kw is not enforce: + raise TypeError( + '{}.dump(_all) takes two positional argument but at least ' + 'three were given ({!r})'.format(self.__class__.__name__, _kw) + ) + # The stream should have the methods `write` and possibly `flush`. + if self.top_level_colon_align is True: + tlca = max([len(str(x)) for x in documents[0]]) # type: Any + else: + tlca = self.top_level_colon_align + if transform is not None: + fstream = stream + if self.encoding is None: + stream = StringIO() + else: + stream = BytesIO() + serializer, representer, emitter = self.get_serializer_representer_emitter( + stream, tlca + ) + try: + self.serializer.open() + for data in documents: + try: + self.representer.represent(data) + except AttributeError: + # nprint(dir(dumper._representer)) + raise + self.serializer.close() + finally: + try: + self.emitter.dispose() + except AttributeError: + raise + # self.dumper.dispose() # cyaml + delattr(self, '_serializer') + delattr(self, '_emitter') + if transform: + val = stream.getvalue() + if self.encoding: + val = val.decode(self.encoding) + if fstream is None: + transform(val) + else: + fstream.write(transform(val)) + return None + + def get_serializer_representer_emitter(self, stream, tlca): + # type: (StreamType, Any) -> Any + # we have only .Serializer to deal with (vs .Reader & .Scanner), much simpler + if self.Emitter is not CEmitter: + if self.Serializer is None: + self.Serializer = ruamel.yaml.serializer.Serializer + self.emitter.stream = stream + self.emitter.top_level_colon_align = tlca + if self.scalar_after_indicator is not None: + self.emitter.scalar_after_indicator = self.scalar_after_indicator + return self.serializer, self.representer, self.emitter + if self.Serializer is not None: + # cannot set serializer with CEmitter + self.Emitter = ruamel.yaml.emitter.Emitter + self.emitter.stream = stream + self.emitter.top_level_colon_align = tlca + if self.scalar_after_indicator is not None: + self.emitter.scalar_after_indicator = self.scalar_after_indicator + return self.serializer, self.representer, self.emitter + # C routines + + rslvr = ( + ruamel.yaml.resolver.BaseResolver + if 'base' in self.typ + else ruamel.yaml.resolver.Resolver + ) + + class XDumper(CEmitter, self.Representer, rslvr): # type: ignore + def __init__( + selfx, + stream, + default_style=None, + default_flow_style=None, + canonical=None, + indent=None, + width=None, + allow_unicode=None, + line_break=None, + encoding=None, + explicit_start=None, + explicit_end=None, + version=None, + tags=None, + block_seq_indent=None, + top_level_colon_align=None, + prefix_colon=None, + ): + # type: (StreamType, Any, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> None # NOQA + CEmitter.__init__( + selfx, + stream, + canonical=canonical, + indent=indent, + width=width, + encoding=encoding, + allow_unicode=allow_unicode, + line_break=line_break, + explicit_start=explicit_start, + explicit_end=explicit_end, + version=version, + tags=tags, + ) + selfx._emitter = selfx._serializer = selfx._representer = selfx + self.Representer.__init__( + selfx, default_style=default_style, default_flow_style=default_flow_style + ) + rslvr.__init__(selfx) + + self._stream = stream + dumper = XDumper( + stream, + default_style=self.default_style, + default_flow_style=self.default_flow_style, + canonical=self.canonical, + indent=self.old_indent, + width=self.width, + allow_unicode=self.allow_unicode, + line_break=self.line_break, + explicit_start=self.explicit_start, + explicit_end=self.explicit_end, + version=self.version, + tags=self.tags, + ) + self._emitter = self._serializer = dumper + return dumper, dumper, dumper + + # basic types + def map(self, **kw): + # type: (Any) -> Any + if 'rt' in self.typ: + from dynaconf.vendor.ruamel.yaml.comments import CommentedMap + + return CommentedMap(**kw) + else: + return dict(**kw) + + def seq(self, *args): + # type: (Any) -> Any + if 'rt' in self.typ: + from dynaconf.vendor.ruamel.yaml.comments import CommentedSeq + + return CommentedSeq(*args) + else: + return list(*args) + + # helpers + def official_plug_ins(self): + # type: () -> Any + bd = os.path.dirname(__file__) + gpbd = os.path.dirname(os.path.dirname(bd)) + res = [x.replace(gpbd, "")[1:-3] for x in glob.glob(bd + '/*/__plug_in__.py')] + return res + + def register_class(self, cls): + # type:(Any) -> Any + """ + register a class for dumping loading + - if it has attribute yaml_tag use that to register, else use class name + - if it has methods to_yaml/from_yaml use those to dump/load else dump attributes + as mapping + """ + tag = getattr(cls, 'yaml_tag', '!' + cls.__name__) + try: + self.representer.add_representer(cls, cls.to_yaml) + except AttributeError: + + def t_y(representer, data): + # type: (Any, Any) -> Any + return representer.represent_yaml_object( + tag, data, cls, flow_style=representer.default_flow_style + ) + + self.representer.add_representer(cls, t_y) + try: + self.constructor.add_constructor(tag, cls.from_yaml) + except AttributeError: + + def f_y(constructor, node): + # type: (Any, Any) -> Any + return constructor.construct_yaml_object(node, cls) + + self.constructor.add_constructor(tag, f_y) + return cls + + def parse(self, stream): + # type: (StreamTextType) -> Any + """ + Parse a YAML stream and produce parsing events. + """ + _, parser = self.get_constructor_parser(stream) + try: + while parser.check_event(): + yield parser.get_event() + finally: + parser.dispose() + try: + self._reader.reset_reader() + except AttributeError: + pass + try: + self._scanner.reset_scanner() + except AttributeError: + pass + + # ### context manager + + def __enter__(self): + # type: () -> Any + self._context_manager = YAMLContextManager(self) + return self + + def __exit__(self, typ, value, traceback): + # type: (Any, Any, Any) -> None + if typ: + nprint('typ', typ) + self._context_manager.teardown_output() + # self._context_manager.teardown_input() + self._context_manager = None + + # ### backwards compatibility + def _indent(self, mapping=None, sequence=None, offset=None): + # type: (Any, Any, Any) -> None + if mapping is not None: + self.map_indent = mapping + if sequence is not None: + self.sequence_indent = sequence + if offset is not None: + self.sequence_dash_offset = offset + + @property + def indent(self): + # type: () -> Any + return self._indent + + @indent.setter + def indent(self, val): + # type: (Any) -> None + self.old_indent = val + + @property + def block_seq_indent(self): + # type: () -> Any + return self.sequence_dash_offset + + @block_seq_indent.setter + def block_seq_indent(self, val): + # type: (Any) -> None + self.sequence_dash_offset = val + + def compact(self, seq_seq=None, seq_map=None): + # type: (Any, Any) -> None + self.compact_seq_seq = seq_seq + self.compact_seq_map = seq_map + + +class YAMLContextManager(object): + def __init__(self, yaml, transform=None): + # type: (Any, Any) -> None # used to be: (Any, Optional[Callable]) -> None + self._yaml = yaml + self._output_inited = False + self._output_path = None + self._output = self._yaml._output + self._transform = transform + + # self._input_inited = False + # self._input = input + # self._input_path = None + # self._transform = yaml.transform + # self._fstream = None + + if not hasattr(self._output, 'write') and hasattr(self._output, 'open'): + # pathlib.Path() instance, open with the same mode + self._output_path = self._output + self._output = self._output_path.open('w') + + # if not hasattr(self._stream, 'write') and hasattr(stream, 'open'): + # if not hasattr(self._input, 'read') and hasattr(self._input, 'open'): + # # pathlib.Path() instance, open with the same mode + # self._input_path = self._input + # self._input = self._input_path.open('r') + + if self._transform is not None: + self._fstream = self._output + if self._yaml.encoding is None: + self._output = StringIO() + else: + self._output = BytesIO() + + def teardown_output(self): + # type: () -> None + if self._output_inited: + self._yaml.serializer.close() + else: + return + try: + self._yaml.emitter.dispose() + except AttributeError: + raise + # self.dumper.dispose() # cyaml + try: + delattr(self._yaml, '_serializer') + delattr(self._yaml, '_emitter') + except AttributeError: + raise + if self._transform: + val = self._output.getvalue() + if self._yaml.encoding: + val = val.decode(self._yaml.encoding) + if self._fstream is None: + self._transform(val) + else: + self._fstream.write(self._transform(val)) + self._fstream.flush() + self._output = self._fstream # maybe not necessary + if self._output_path is not None: + self._output.close() + + def init_output(self, first_data): + # type: (Any) -> None + if self._yaml.top_level_colon_align is True: + tlca = max([len(str(x)) for x in first_data]) # type: Any + else: + tlca = self._yaml.top_level_colon_align + self._yaml.get_serializer_representer_emitter(self._output, tlca) + self._yaml.serializer.open() + self._output_inited = True + + def dump(self, data): + # type: (Any) -> None + if not self._output_inited: + self.init_output(data) + try: + self._yaml.representer.represent(data) + except AttributeError: + # nprint(dir(dumper._representer)) + raise + + # def teardown_input(self): + # pass + # + # def init_input(self): + # # set the constructor and parser on YAML() instance + # self._yaml.get_constructor_parser(stream) + # + # def load(self): + # if not self._input_inited: + # self.init_input() + # try: + # while self._yaml.constructor.check_data(): + # yield self._yaml.constructor.get_data() + # finally: + # parser.dispose() + # try: + # self._reader.reset_reader() # type: ignore + # except AttributeError: + # pass + # try: + # self._scanner.reset_scanner() # type: ignore + # except AttributeError: + # pass + + +def yaml_object(yml): + # type: (Any) -> Any + """ decorator for classes that needs to dump/load objects + The tag for such objects is taken from the class attribute yaml_tag (or the + class name in lowercase in case unavailable) + If methods to_yaml and/or from_yaml are available, these are called for dumping resp. + loading, default routines (dumping a mapping of the attributes) used otherwise. + """ + + def yo_deco(cls): + # type: (Any) -> Any + tag = getattr(cls, 'yaml_tag', '!' + cls.__name__) + try: + yml.representer.add_representer(cls, cls.to_yaml) + except AttributeError: + + def t_y(representer, data): + # type: (Any, Any) -> Any + return representer.represent_yaml_object( + tag, data, cls, flow_style=representer.default_flow_style + ) + + yml.representer.add_representer(cls, t_y) + try: + yml.constructor.add_constructor(tag, cls.from_yaml) + except AttributeError: + + def f_y(constructor, node): + # type: (Any, Any) -> Any + return constructor.construct_yaml_object(node, cls) + + yml.constructor.add_constructor(tag, f_y) + return cls + + return yo_deco + + +######################################################################################## + + +def scan(stream, Loader=Loader): + # type: (StreamTextType, Any) -> Any + """ + Scan a YAML stream and produce scanning tokens. + """ + loader = Loader(stream) + try: + while loader.scanner.check_token(): + yield loader.scanner.get_token() + finally: + loader._parser.dispose() + + +def parse(stream, Loader=Loader): + # type: (StreamTextType, Any) -> Any + """ + Parse a YAML stream and produce parsing events. + """ + loader = Loader(stream) + try: + while loader._parser.check_event(): + yield loader._parser.get_event() + finally: + loader._parser.dispose() + + +def compose(stream, Loader=Loader): + # type: (StreamTextType, Any) -> Any + """ + Parse the first YAML document in a stream + and produce the corresponding representation tree. + """ + loader = Loader(stream) + try: + return loader.get_single_node() + finally: + loader.dispose() + + +def compose_all(stream, Loader=Loader): + # type: (StreamTextType, Any) -> Any + """ + Parse all YAML documents in a stream + and produce corresponding representation trees. + """ + loader = Loader(stream) + try: + while loader.check_node(): + yield loader._composer.get_node() + finally: + loader._parser.dispose() + + +def load(stream, Loader=None, version=None, preserve_quotes=None): + # type: (StreamTextType, Any, Optional[VersionType], Any) -> Any + """ + Parse the first YAML document in a stream + and produce the corresponding Python object. + """ + if Loader is None: + warnings.warn(UnsafeLoaderWarning.text, UnsafeLoaderWarning, stacklevel=2) + Loader = UnsafeLoader + loader = Loader(stream, version, preserve_quotes=preserve_quotes) + try: + return loader._constructor.get_single_data() + finally: + loader._parser.dispose() + try: + loader._reader.reset_reader() + except AttributeError: + pass + try: + loader._scanner.reset_scanner() + except AttributeError: + pass + + +def load_all(stream, Loader=None, version=None, preserve_quotes=None): + # type: (Optional[StreamTextType], Any, Optional[VersionType], Optional[bool]) -> Any # NOQA + """ + Parse all YAML documents in a stream + and produce corresponding Python objects. + """ + if Loader is None: + warnings.warn(UnsafeLoaderWarning.text, UnsafeLoaderWarning, stacklevel=2) + Loader = UnsafeLoader + loader = Loader(stream, version, preserve_quotes=preserve_quotes) + try: + while loader._constructor.check_data(): + yield loader._constructor.get_data() + finally: + loader._parser.dispose() + try: + loader._reader.reset_reader() + except AttributeError: + pass + try: + loader._scanner.reset_scanner() + except AttributeError: + pass + + +def safe_load(stream, version=None): + # type: (StreamTextType, Optional[VersionType]) -> Any + """ + Parse the first YAML document in a stream + and produce the corresponding Python object. + Resolve only basic YAML tags. + """ + return load(stream, SafeLoader, version) + + +def safe_load_all(stream, version=None): + # type: (StreamTextType, Optional[VersionType]) -> Any + """ + Parse all YAML documents in a stream + and produce corresponding Python objects. + Resolve only basic YAML tags. + """ + return load_all(stream, SafeLoader, version) + + +def round_trip_load(stream, version=None, preserve_quotes=None): + # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> Any + """ + Parse the first YAML document in a stream + and produce the corresponding Python object. + Resolve only basic YAML tags. + """ + return load(stream, RoundTripLoader, version, preserve_quotes=preserve_quotes) + + +def round_trip_load_all(stream, version=None, preserve_quotes=None): + # type: (StreamTextType, Optional[VersionType], Optional[bool]) -> Any + """ + Parse all YAML documents in a stream + and produce corresponding Python objects. + Resolve only basic YAML tags. + """ + return load_all(stream, RoundTripLoader, version, preserve_quotes=preserve_quotes) + + +def emit( + events, + stream=None, + Dumper=Dumper, + canonical=None, + indent=None, + width=None, + allow_unicode=None, + line_break=None, +): + # type: (Any, Optional[StreamType], Any, Optional[bool], Union[int, None], Optional[int], Optional[bool], Any) -> Any # NOQA + """ + Emit YAML parsing events into a stream. + If stream is None, return the produced string instead. + """ + getvalue = None + if stream is None: + stream = StringIO() + getvalue = stream.getvalue + dumper = Dumper( + stream, + canonical=canonical, + indent=indent, + width=width, + allow_unicode=allow_unicode, + line_break=line_break, + ) + try: + for event in events: + dumper.emit(event) + finally: + try: + dumper._emitter.dispose() + except AttributeError: + raise + dumper.dispose() # cyaml + if getvalue is not None: + return getvalue() + + +enc = None if PY3 else 'utf-8' + + +def serialize_all( + nodes, + stream=None, + Dumper=Dumper, + canonical=None, + indent=None, + width=None, + allow_unicode=None, + line_break=None, + encoding=enc, + explicit_start=None, + explicit_end=None, + version=None, + tags=None, +): + # type: (Any, Optional[StreamType], Any, Any, Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Optional[VersionType], Any) -> Any # NOQA + """ + Serialize a sequence of representation trees into a YAML stream. + If stream is None, return the produced string instead. + """ + getvalue = None + if stream is None: + if encoding is None: + stream = StringIO() + else: + stream = BytesIO() + getvalue = stream.getvalue + dumper = Dumper( + stream, + canonical=canonical, + indent=indent, + width=width, + allow_unicode=allow_unicode, + line_break=line_break, + encoding=encoding, + version=version, + tags=tags, + explicit_start=explicit_start, + explicit_end=explicit_end, + ) + try: + dumper._serializer.open() + for node in nodes: + dumper.serialize(node) + dumper._serializer.close() + finally: + try: + dumper._emitter.dispose() + except AttributeError: + raise + dumper.dispose() # cyaml + if getvalue is not None: + return getvalue() + + +def serialize(node, stream=None, Dumper=Dumper, **kwds): + # type: (Any, Optional[StreamType], Any, Any) -> Any + """ + Serialize a representation tree into a YAML stream. + If stream is None, return the produced string instead. + """ + return serialize_all([node], stream, Dumper=Dumper, **kwds) + + +def dump_all( + documents, + stream=None, + Dumper=Dumper, + default_style=None, + default_flow_style=None, + canonical=None, + indent=None, + width=None, + allow_unicode=None, + line_break=None, + encoding=enc, + explicit_start=None, + explicit_end=None, + version=None, + tags=None, + block_seq_indent=None, + top_level_colon_align=None, + prefix_colon=None, +): + # type: (Any, Optional[StreamType], Any, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Any, Any, Any, Any, Any) -> Optional[str] # NOQA + """ + Serialize a sequence of Python objects into a YAML stream. + If stream is None, return the produced string instead. + """ + getvalue = None + if top_level_colon_align is True: + top_level_colon_align = max([len(str(x)) for x in documents[0]]) + if stream is None: + if encoding is None: + stream = StringIO() + else: + stream = BytesIO() + getvalue = stream.getvalue + dumper = Dumper( + stream, + default_style=default_style, + default_flow_style=default_flow_style, + canonical=canonical, + indent=indent, + width=width, + allow_unicode=allow_unicode, + line_break=line_break, + encoding=encoding, + explicit_start=explicit_start, + explicit_end=explicit_end, + version=version, + tags=tags, + block_seq_indent=block_seq_indent, + top_level_colon_align=top_level_colon_align, + prefix_colon=prefix_colon, + ) + try: + dumper._serializer.open() + for data in documents: + try: + dumper._representer.represent(data) + except AttributeError: + # nprint(dir(dumper._representer)) + raise + dumper._serializer.close() + finally: + try: + dumper._emitter.dispose() + except AttributeError: + raise + dumper.dispose() # cyaml + if getvalue is not None: + return getvalue() + return None + + +def dump( + data, + stream=None, + Dumper=Dumper, + default_style=None, + default_flow_style=None, + canonical=None, + indent=None, + width=None, + allow_unicode=None, + line_break=None, + encoding=enc, + explicit_start=None, + explicit_end=None, + version=None, + tags=None, + block_seq_indent=None, +): + # type: (Any, Optional[StreamType], Any, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Optional[VersionType], Any, Any) -> Optional[str] # NOQA + """ + Serialize a Python object into a YAML stream. + If stream is None, return the produced string instead. + + default_style ∈ None, '', '"', "'", '|', '>' + + """ + return dump_all( + [data], + stream, + Dumper=Dumper, + default_style=default_style, + default_flow_style=default_flow_style, + canonical=canonical, + indent=indent, + width=width, + allow_unicode=allow_unicode, + line_break=line_break, + encoding=encoding, + explicit_start=explicit_start, + explicit_end=explicit_end, + version=version, + tags=tags, + block_seq_indent=block_seq_indent, + ) + + +def safe_dump_all(documents, stream=None, **kwds): + # type: (Any, Optional[StreamType], Any) -> Optional[str] + """ + Serialize a sequence of Python objects into a YAML stream. + Produce only basic YAML tags. + If stream is None, return the produced string instead. + """ + return dump_all(documents, stream, Dumper=SafeDumper, **kwds) + + +def safe_dump(data, stream=None, **kwds): + # type: (Any, Optional[StreamType], Any) -> Optional[str] + """ + Serialize a Python object into a YAML stream. + Produce only basic YAML tags. + If stream is None, return the produced string instead. + """ + return dump_all([data], stream, Dumper=SafeDumper, **kwds) + + +def round_trip_dump( + data, + stream=None, + Dumper=RoundTripDumper, + default_style=None, + default_flow_style=None, + canonical=None, + indent=None, + width=None, + allow_unicode=None, + line_break=None, + encoding=enc, + explicit_start=None, + explicit_end=None, + version=None, + tags=None, + block_seq_indent=None, + top_level_colon_align=None, + prefix_colon=None, +): + # type: (Any, Optional[StreamType], Any, Any, Any, Optional[bool], Optional[int], Optional[int], Optional[bool], Any, Any, Optional[bool], Optional[bool], Optional[VersionType], Any, Any, Any, Any) -> Optional[str] # NOQA + allow_unicode = True if allow_unicode is None else allow_unicode + return dump_all( + [data], + stream, + Dumper=Dumper, + default_style=default_style, + default_flow_style=default_flow_style, + canonical=canonical, + indent=indent, + width=width, + allow_unicode=allow_unicode, + line_break=line_break, + encoding=encoding, + explicit_start=explicit_start, + explicit_end=explicit_end, + version=version, + tags=tags, + block_seq_indent=block_seq_indent, + top_level_colon_align=top_level_colon_align, + prefix_colon=prefix_colon, + ) + + +# Loader/Dumper are no longer composites, to get to the associated +# Resolver()/Representer(), etc., you need to instantiate the class + + +def add_implicit_resolver( + tag, regexp, first=None, Loader=None, Dumper=None, resolver=Resolver +): + # type: (Any, Any, Any, Any, Any, Any) -> None + """ + Add an implicit scalar detector. + If an implicit scalar value matches the given regexp, + the corresponding tag is assigned to the scalar. + first is a sequence of possible initial characters or None. + """ + if Loader is None and Dumper is None: + resolver.add_implicit_resolver(tag, regexp, first) + return + if Loader: + if hasattr(Loader, 'add_implicit_resolver'): + Loader.add_implicit_resolver(tag, regexp, first) + elif issubclass( + Loader, (BaseLoader, SafeLoader, ruamel.yaml.loader.Loader, RoundTripLoader) + ): + Resolver.add_implicit_resolver(tag, regexp, first) + else: + raise NotImplementedError + if Dumper: + if hasattr(Dumper, 'add_implicit_resolver'): + Dumper.add_implicit_resolver(tag, regexp, first) + elif issubclass( + Dumper, (BaseDumper, SafeDumper, ruamel.yaml.dumper.Dumper, RoundTripDumper) + ): + Resolver.add_implicit_resolver(tag, regexp, first) + else: + raise NotImplementedError + + +# this code currently not tested +def add_path_resolver(tag, path, kind=None, Loader=None, Dumper=None, resolver=Resolver): + # type: (Any, Any, Any, Any, Any, Any) -> None + """ + Add a path based resolver for the given tag. + A path is a list of keys that forms a path + to a node in the representation tree. + Keys can be string values, integers, or None. + """ + if Loader is None and Dumper is None: + resolver.add_path_resolver(tag, path, kind) + return + if Loader: + if hasattr(Loader, 'add_path_resolver'): + Loader.add_path_resolver(tag, path, kind) + elif issubclass( + Loader, (BaseLoader, SafeLoader, ruamel.yaml.loader.Loader, RoundTripLoader) + ): + Resolver.add_path_resolver(tag, path, kind) + else: + raise NotImplementedError + if Dumper: + if hasattr(Dumper, 'add_path_resolver'): + Dumper.add_path_resolver(tag, path, kind) + elif issubclass( + Dumper, (BaseDumper, SafeDumper, ruamel.yaml.dumper.Dumper, RoundTripDumper) + ): + Resolver.add_path_resolver(tag, path, kind) + else: + raise NotImplementedError + + +def add_constructor(tag, object_constructor, Loader=None, constructor=Constructor): + # type: (Any, Any, Any, Any) -> None + """ + Add an object constructor for the given tag. + object_onstructor is a function that accepts a Loader instance + and a node object and produces the corresponding Python object. + """ + if Loader is None: + constructor.add_constructor(tag, object_constructor) + else: + if hasattr(Loader, 'add_constructor'): + Loader.add_constructor(tag, object_constructor) + return + if issubclass(Loader, BaseLoader): + BaseConstructor.add_constructor(tag, object_constructor) + elif issubclass(Loader, SafeLoader): + SafeConstructor.add_constructor(tag, object_constructor) + elif issubclass(Loader, Loader): + Constructor.add_constructor(tag, object_constructor) + elif issubclass(Loader, RoundTripLoader): + RoundTripConstructor.add_constructor(tag, object_constructor) + else: + raise NotImplementedError + + +def add_multi_constructor(tag_prefix, multi_constructor, Loader=None, constructor=Constructor): + # type: (Any, Any, Any, Any) -> None + """ + Add a multi-constructor for the given tag prefix. + Multi-constructor is called for a node if its tag starts with tag_prefix. + Multi-constructor accepts a Loader instance, a tag suffix, + and a node object and produces the corresponding Python object. + """ + if Loader is None: + constructor.add_multi_constructor(tag_prefix, multi_constructor) + else: + if False and hasattr(Loader, 'add_multi_constructor'): + Loader.add_multi_constructor(tag_prefix, constructor) + return + if issubclass(Loader, BaseLoader): + BaseConstructor.add_multi_constructor(tag_prefix, multi_constructor) + elif issubclass(Loader, SafeLoader): + SafeConstructor.add_multi_constructor(tag_prefix, multi_constructor) + elif issubclass(Loader, ruamel.yaml.loader.Loader): + Constructor.add_multi_constructor(tag_prefix, multi_constructor) + elif issubclass(Loader, RoundTripLoader): + RoundTripConstructor.add_multi_constructor(tag_prefix, multi_constructor) + else: + raise NotImplementedError + + +def add_representer(data_type, object_representer, Dumper=None, representer=Representer): + # type: (Any, Any, Any, Any) -> None + """ + Add a representer for the given type. + object_representer is a function accepting a Dumper instance + and an instance of the given data type + and producing the corresponding representation node. + """ + if Dumper is None: + representer.add_representer(data_type, object_representer) + else: + if hasattr(Dumper, 'add_representer'): + Dumper.add_representer(data_type, object_representer) + return + if issubclass(Dumper, BaseDumper): + BaseRepresenter.add_representer(data_type, object_representer) + elif issubclass(Dumper, SafeDumper): + SafeRepresenter.add_representer(data_type, object_representer) + elif issubclass(Dumper, Dumper): + Representer.add_representer(data_type, object_representer) + elif issubclass(Dumper, RoundTripDumper): + RoundTripRepresenter.add_representer(data_type, object_representer) + else: + raise NotImplementedError + + +# this code currently not tested +def add_multi_representer(data_type, multi_representer, Dumper=None, representer=Representer): + # type: (Any, Any, Any, Any) -> None + """ + Add a representer for the given type. + multi_representer is a function accepting a Dumper instance + and an instance of the given data type or subtype + and producing the corresponding representation node. + """ + if Dumper is None: + representer.add_multi_representer(data_type, multi_representer) + else: + if hasattr(Dumper, 'add_multi_representer'): + Dumper.add_multi_representer(data_type, multi_representer) + return + if issubclass(Dumper, BaseDumper): + BaseRepresenter.add_multi_representer(data_type, multi_representer) + elif issubclass(Dumper, SafeDumper): + SafeRepresenter.add_multi_representer(data_type, multi_representer) + elif issubclass(Dumper, Dumper): + Representer.add_multi_representer(data_type, multi_representer) + elif issubclass(Dumper, RoundTripDumper): + RoundTripRepresenter.add_multi_representer(data_type, multi_representer) + else: + raise NotImplementedError + + +class YAMLObjectMetaclass(type): + """ + The metaclass for YAMLObject. + """ + + def __init__(cls, name, bases, kwds): + # type: (Any, Any, Any) -> None + super(YAMLObjectMetaclass, cls).__init__(name, bases, kwds) + if 'yaml_tag' in kwds and kwds['yaml_tag'] is not None: + cls.yaml_constructor.add_constructor(cls.yaml_tag, cls.from_yaml) # type: ignore + cls.yaml_representer.add_representer(cls, cls.to_yaml) # type: ignore + + +class YAMLObject(with_metaclass(YAMLObjectMetaclass)): # type: ignore + """ + An object that can dump itself to a YAML stream + and load itself from a YAML stream. + """ + + __slots__ = () # no direct instantiation, so allow immutable subclasses + + yaml_constructor = Constructor + yaml_representer = Representer + + yaml_tag = None # type: Any + yaml_flow_style = None # type: Any + + @classmethod + def from_yaml(cls, constructor, node): + # type: (Any, Any) -> Any + """ + Convert a representation node to a Python object. + """ + return constructor.construct_yaml_object(node, cls) + + @classmethod + def to_yaml(cls, representer, data): + # type: (Any, Any) -> Any + """ + Convert a Python object to a representation node. + """ + return representer.represent_yaml_object( + cls.yaml_tag, data, cls, flow_style=cls.yaml_flow_style + ) |