1728 lines
63 KiB
Python
1728 lines
63 KiB
Python
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# coding: utf-8
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from __future__ import absolute_import
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from __future__ import print_function
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# Emitter expects events obeying the following grammar:
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# stream ::= STREAM-START document* STREAM-END
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# document ::= DOCUMENT-START node DOCUMENT-END
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# node ::= SCALAR | sequence | mapping
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# sequence ::= SEQUENCE-START node* SEQUENCE-END
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# mapping ::= MAPPING-START (node node)* MAPPING-END
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import sys
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from .error import YAMLError, YAMLStreamError
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from .events import * # NOQA
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# fmt: off
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from .compat import utf8, text_type, PY2, nprint, dbg, DBG_EVENT, \
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check_anchorname_char
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# fmt: on
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if False: # MYPY
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from typing import Any, Dict, List, Union, Text, Tuple, Optional # NOQA
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from .compat import StreamType # NOQA
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__all__ = ["Emitter", "EmitterError"]
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class EmitterError(YAMLError):
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pass
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class ScalarAnalysis(object):
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def __init__(
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self,
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scalar,
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empty,
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multiline,
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allow_flow_plain,
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allow_block_plain,
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allow_single_quoted,
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allow_double_quoted,
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allow_block,
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):
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# type: (Any, Any, Any, bool, bool, bool, bool, bool) -> None
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self.scalar = scalar
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self.empty = empty
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self.multiline = multiline
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self.allow_flow_plain = allow_flow_plain
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self.allow_block_plain = allow_block_plain
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self.allow_single_quoted = allow_single_quoted
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self.allow_double_quoted = allow_double_quoted
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self.allow_block = allow_block
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class Indents(object):
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# replacement for the list based stack of None/int
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def __init__(self):
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# type: () -> None
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self.values = [] # type: List[Tuple[int, bool]]
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def append(self, val, seq):
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# type: (Any, Any) -> None
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self.values.append((val, seq))
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def pop(self):
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# type: () -> Any
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return self.values.pop()[0]
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def last_seq(self):
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# type: () -> bool
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# return the seq(uence) value for the element added before the last one
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# in increase_indent()
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try:
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return self.values[-2][1]
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except IndexError:
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return False
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def seq_flow_align(self, seq_indent, column):
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# type: (int, int) -> int
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# extra spaces because of dash
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if len(self.values) < 2 or not self.values[-1][1]:
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return 0
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# -1 for the dash
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base = self.values[-1][0] if self.values[-1][0] is not None else 0
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return base + seq_indent - column - 1
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def __len__(self):
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# type: () -> int
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return len(self.values)
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class Emitter(object):
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# fmt: off
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DEFAULT_TAG_PREFIXES = {
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u'!': u'!',
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u'tag:yaml.org,2002:': u'!!',
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}
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# fmt: on
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MAX_SIMPLE_KEY_LENGTH = 128
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def __init__(
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self,
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stream,
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canonical=None,
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indent=None,
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width=None,
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allow_unicode=None,
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line_break=None,
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block_seq_indent=None,
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top_level_colon_align=None,
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prefix_colon=None,
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brace_single_entry_mapping_in_flow_sequence=None,
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dumper=None,
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):
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# type: (StreamType, Any, Optional[int], Optional[int], Optional[bool], Any, Optional[int], Optional[bool], Any, Optional[bool], Any) -> None # NOQA
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self.dumper = dumper
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if self.dumper is not None and getattr(self.dumper, "_emitter", None) is None:
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self.dumper._emitter = self
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self.stream = stream
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# Encoding can be overriden by STREAM-START.
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self.encoding = None # type: Optional[Text]
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self.allow_space_break = None
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# Emitter is a state machine with a stack of states to handle nested
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# structures.
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self.states = [] # type: List[Any]
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self.state = self.expect_stream_start # type: Any
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# Current event and the event queue.
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self.events = [] # type: List[Any]
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self.event = None # type: Any
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# The current indentation level and the stack of previous indents.
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self.indents = Indents()
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self.indent = None # type: Optional[int]
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# flow_context is an expanding/shrinking list consisting of '{' and '['
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# for each unclosed flow context. If empty list that means block context
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self.flow_context = [] # type: List[Text]
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# Contexts.
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self.root_context = False
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self.sequence_context = False
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self.mapping_context = False
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self.simple_key_context = False
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# Characteristics of the last emitted character:
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# - current position.
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# - is it a whitespace?
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# - is it an indention character
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# (indentation space, '-', '?', or ':')?
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self.line = 0
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self.column = 0
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self.whitespace = True
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self.indention = True
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self.compact_seq_seq = True # dash after dash
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self.compact_seq_map = True # key after dash
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# self.compact_ms = False # dash after key, only when excplicit key with ?
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self.no_newline = None # type: Optional[bool] # set if directly after `- `
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# Whether the document requires an explicit document end indicator
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self.open_ended = False
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# colon handling
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self.colon = u":"
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self.prefixed_colon = (
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self.colon if prefix_colon is None else prefix_colon + self.colon
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)
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# single entry mappings in flow sequence
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self.brace_single_entry_mapping_in_flow_sequence = (
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brace_single_entry_mapping_in_flow_sequence
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) # NOQA
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# Formatting details.
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self.canonical = canonical
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self.allow_unicode = allow_unicode
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# set to False to get "\Uxxxxxxxx" for non-basic unicode like emojis
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self.unicode_supplementary = sys.maxunicode > 0xFFFF
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self.sequence_dash_offset = block_seq_indent if block_seq_indent else 0
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self.top_level_colon_align = top_level_colon_align
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self.best_sequence_indent = 2
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self.requested_indent = indent # specific for literal zero indent
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if indent and 1 < indent < 10:
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self.best_sequence_indent = indent
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self.best_map_indent = self.best_sequence_indent
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# if self.best_sequence_indent < self.sequence_dash_offset + 1:
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# self.best_sequence_indent = self.sequence_dash_offset + 1
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self.best_width = 80
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if width and width > self.best_sequence_indent * 2:
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self.best_width = width
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self.best_line_break = u"\n" # type: Any
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if line_break in [u"\r", u"\n", u"\r\n"]:
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self.best_line_break = line_break
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# Tag prefixes.
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self.tag_prefixes = None # type: Any
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# Prepared anchor and tag.
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self.prepared_anchor = None # type: Any
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self.prepared_tag = None # type: Any
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# Scalar analysis and style.
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self.analysis = None # type: Any
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self.style = None # type: Any
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self.scalar_after_indicator = True # write a scalar on the same line as `---`
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@property
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def stream(self):
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# type: () -> Any
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try:
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return self._stream
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except AttributeError:
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raise YAMLStreamError("output stream needs to specified")
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@stream.setter
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def stream(self, val):
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# type: (Any) -> None
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if val is None:
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return
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if not hasattr(val, "write"):
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raise YAMLStreamError("stream argument needs to have a write() method")
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self._stream = val
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@property
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def serializer(self):
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# type: () -> Any
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try:
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if hasattr(self.dumper, "typ"):
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return self.dumper.serializer
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return self.dumper._serializer
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except AttributeError:
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return self # cyaml
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@property
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def flow_level(self):
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# type: () -> int
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return len(self.flow_context)
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def dispose(self):
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# type: () -> None
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# Reset the state attributes (to clear self-references)
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self.states = []
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self.state = None
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def emit(self, event):
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# type: (Any) -> None
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if dbg(DBG_EVENT):
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nprint(event)
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self.events.append(event)
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while not self.need_more_events():
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self.event = self.events.pop(0)
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self.state()
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self.event = None
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# In some cases, we wait for a few next events before emitting.
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def need_more_events(self):
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# type: () -> bool
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if not self.events:
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return True
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event = self.events[0]
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if isinstance(event, DocumentStartEvent):
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return self.need_events(1)
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elif isinstance(event, SequenceStartEvent):
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return self.need_events(2)
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elif isinstance(event, MappingStartEvent):
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return self.need_events(3)
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else:
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return False
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def need_events(self, count):
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# type: (int) -> bool
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level = 0
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for event in self.events[1:]:
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if isinstance(event, (DocumentStartEvent, CollectionStartEvent)):
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level += 1
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elif isinstance(event, (DocumentEndEvent, CollectionEndEvent)):
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level -= 1
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elif isinstance(event, StreamEndEvent):
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level = -1
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if level < 0:
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return False
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return len(self.events) < count + 1
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def increase_indent(self, flow=False, sequence=None, indentless=False):
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# type: (bool, Optional[bool], bool) -> None
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self.indents.append(self.indent, sequence)
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if self.indent is None: # top level
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if flow:
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# self.indent = self.best_sequence_indent if self.indents.last_seq() else \
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# self.best_map_indent
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# self.indent = self.best_sequence_indent
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self.indent = self.requested_indent
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else:
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self.indent = 0
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elif not indentless:
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self.indent += (
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self.best_sequence_indent
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if self.indents.last_seq()
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else self.best_map_indent
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)
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# if self.indents.last_seq():
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# if self.indent == 0: # top level block sequence
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# self.indent = self.best_sequence_indent - self.sequence_dash_offset
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# else:
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# self.indent += self.best_sequence_indent
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# else:
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# self.indent += self.best_map_indent
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# States.
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# Stream handlers.
|
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|
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|
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def expect_stream_start(self):
|
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# type: () -> None
|
||
|
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if isinstance(self.event, StreamStartEvent):
|
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|
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if PY2:
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if self.event.encoding and not getattr(self.stream, "encoding", None):
|
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self.encoding = self.event.encoding
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else:
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if self.event.encoding and not hasattr(self.stream, "encoding"):
|
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self.encoding = self.event.encoding
|
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self.write_stream_start()
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|
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self.state = self.expect_first_document_start
|
||
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else:
|
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|
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raise EmitterError("expected StreamStartEvent, but got %s" % (self.event,))
|
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|
|
|
||
|
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def expect_nothing(self):
|
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# type: () -> None
|
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raise EmitterError("expected nothing, but got %s" % (self.event,))
|
||
|
|
|
||
|
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# Document handlers.
|
||
|
|
|
||
|
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def expect_first_document_start(self):
|
||
|
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# type: () -> Any
|
||
|
|
return self.expect_document_start(first=True)
|
||
|
|
|
||
|
|
def expect_document_start(self, first=False):
|
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|
|
# type: (bool) -> None
|
||
|
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if isinstance(self.event, DocumentStartEvent):
|
||
|
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if (self.event.version or self.event.tags) and self.open_ended:
|
||
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self.write_indicator(u"...", True)
|
||
|
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self.write_indent()
|
||
|
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if self.event.version:
|
||
|
|
version_text = self.prepare_version(self.event.version)
|
||
|
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self.write_version_directive(version_text)
|
||
|
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self.tag_prefixes = self.DEFAULT_TAG_PREFIXES.copy()
|
||
|
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if self.event.tags:
|
||
|
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handles = sorted(self.event.tags.keys())
|
||
|
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for handle in handles:
|
||
|
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prefix = self.event.tags[handle]
|
||
|
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self.tag_prefixes[prefix] = handle
|
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|
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handle_text = self.prepare_tag_handle(handle)
|
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prefix_text = self.prepare_tag_prefix(prefix)
|
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self.write_tag_directive(handle_text, prefix_text)
|
||
|
|
implicit = (
|
||
|
|
first
|
||
|
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and not self.event.explicit
|
||
|
|
and not self.canonical
|
||
|
|
and not self.event.version
|
||
|
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and not self.event.tags
|
||
|
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and not self.check_empty_document()
|
||
|
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)
|
||
|
|
if not implicit:
|
||
|
|
self.write_indent()
|
||
|
|
self.write_indicator(u"---", True)
|
||
|
|
if self.canonical:
|
||
|
|
self.write_indent()
|
||
|
|
self.state = self.expect_document_root
|
||
|
|
elif isinstance(self.event, StreamEndEvent):
|
||
|
|
if self.open_ended:
|
||
|
|
self.write_indicator(u"...", True)
|
||
|
|
self.write_indent()
|
||
|
|
self.write_stream_end()
|
||
|
|
self.state = self.expect_nothing
|
||
|
|
else:
|
||
|
|
raise EmitterError(
|
||
|
|
"expected DocumentStartEvent, but got %s" % (self.event,)
|
||
|
|
)
|
||
|
|
|
||
|
|
def expect_document_end(self):
|
||
|
|
# type: () -> None
|
||
|
|
if isinstance(self.event, DocumentEndEvent):
|
||
|
|
self.write_indent()
|
||
|
|
if self.event.explicit:
|
||
|
|
self.write_indicator(u"...", True)
|
||
|
|
self.write_indent()
|
||
|
|
self.flush_stream()
|
||
|
|
self.state = self.expect_document_start
|
||
|
|
else:
|
||
|
|
raise EmitterError("expected DocumentEndEvent, but got %s" % (self.event,))
|
||
|
|
|
||
|
|
def expect_document_root(self):
|
||
|
|
# type: () -> None
|
||
|
|
self.states.append(self.expect_document_end)
|
||
|
|
self.expect_node(root=True)
|
||
|
|
|
||
|
|
# Node handlers.
|
||
|
|
|
||
|
|
def expect_node(self, root=False, sequence=False, mapping=False, simple_key=False):
|
||
|
|
# type: (bool, bool, bool, bool) -> None
|
||
|
|
self.root_context = root
|
||
|
|
self.sequence_context = sequence # not used in PyYAML
|
||
|
|
self.mapping_context = mapping
|
||
|
|
self.simple_key_context = simple_key
|
||
|
|
if isinstance(self.event, AliasEvent):
|
||
|
|
self.expect_alias()
|
||
|
|
elif isinstance(self.event, (ScalarEvent, CollectionStartEvent)):
|
||
|
|
if (
|
||
|
|
self.process_anchor(u"&")
|
||
|
|
and isinstance(self.event, ScalarEvent)
|
||
|
|
and self.sequence_context
|
||
|
|
):
|
||
|
|
self.sequence_context = False
|
||
|
|
if (
|
||
|
|
root
|
||
|
|
and isinstance(self.event, ScalarEvent)
|
||
|
|
and not self.scalar_after_indicator
|
||
|
|
):
|
||
|
|
self.write_indent()
|
||
|
|
self.process_tag()
|
||
|
|
if isinstance(self.event, ScalarEvent):
|
||
|
|
# nprint('@', self.indention, self.no_newline, self.column)
|
||
|
|
self.expect_scalar()
|
||
|
|
elif isinstance(self.event, SequenceStartEvent):
|
||
|
|
# nprint('@', self.indention, self.no_newline, self.column)
|
||
|
|
i2, n2 = self.indention, self.no_newline # NOQA
|
||
|
|
if self.event.comment:
|
||
|
|
if self.event.flow_style is False and self.event.comment:
|
||
|
|
if self.write_post_comment(self.event):
|
||
|
|
self.indention = False
|
||
|
|
self.no_newline = True
|
||
|
|
if self.write_pre_comment(self.event):
|
||
|
|
self.indention = i2
|
||
|
|
self.no_newline = not self.indention
|
||
|
|
if (
|
||
|
|
self.flow_level
|
||
|
|
or self.canonical
|
||
|
|
or self.event.flow_style
|
||
|
|
or self.check_empty_sequence()
|
||
|
|
):
|
||
|
|
self.expect_flow_sequence()
|
||
|
|
else:
|
||
|
|
self.expect_block_sequence()
|
||
|
|
elif isinstance(self.event, MappingStartEvent):
|
||
|
|
if self.event.flow_style is False and self.event.comment:
|
||
|
|
self.write_post_comment(self.event)
|
||
|
|
if self.event.comment and self.event.comment[1]:
|
||
|
|
self.write_pre_comment(self.event)
|
||
|
|
if (
|
||
|
|
self.flow_level
|
||
|
|
or self.canonical
|
||
|
|
or self.event.flow_style
|
||
|
|
or self.check_empty_mapping()
|
||
|
|
):
|
||
|
|
self.expect_flow_mapping(single=self.event.nr_items == 1)
|
||
|
|
else:
|
||
|
|
self.expect_block_mapping()
|
||
|
|
else:
|
||
|
|
raise EmitterError("expected NodeEvent, but got %s" % (self.event,))
|
||
|
|
|
||
|
|
def expect_alias(self):
|
||
|
|
# type: () -> None
|
||
|
|
if self.event.anchor is None:
|
||
|
|
raise EmitterError("anchor is not specified for alias")
|
||
|
|
self.process_anchor(u"*")
|
||
|
|
self.state = self.states.pop()
|
||
|
|
|
||
|
|
def expect_scalar(self):
|
||
|
|
# type: () -> None
|
||
|
|
self.increase_indent(flow=True)
|
||
|
|
self.process_scalar()
|
||
|
|
self.indent = self.indents.pop()
|
||
|
|
self.state = self.states.pop()
|
||
|
|
|
||
|
|
# Flow sequence handlers.
|
||
|
|
|
||
|
|
def expect_flow_sequence(self):
|
||
|
|
# type: () -> None
|
||
|
|
ind = self.indents.seq_flow_align(self.best_sequence_indent, self.column)
|
||
|
|
self.write_indicator(u" " * ind + u"[", True, whitespace=True)
|
||
|
|
self.increase_indent(flow=True, sequence=True)
|
||
|
|
self.flow_context.append("[")
|
||
|
|
self.state = self.expect_first_flow_sequence_item
|
||
|
|
|
||
|
|
def expect_first_flow_sequence_item(self):
|
||
|
|
# type: () -> None
|
||
|
|
if isinstance(self.event, SequenceEndEvent):
|
||
|
|
self.indent = self.indents.pop()
|
||
|
|
popped = self.flow_context.pop()
|
||
|
|
assert popped == "["
|
||
|
|
self.write_indicator(u"]", False)
|
||
|
|
if self.event.comment and self.event.comment[0]:
|
||
|
|
# eol comment on empty flow sequence
|
||
|
|
self.write_post_comment(self.event)
|
||
|
|
elif self.flow_level == 0:
|
||
|
|
self.write_line_break()
|
||
|
|
self.state = self.states.pop()
|
||
|
|
else:
|
||
|
|
if self.canonical or self.column > self.best_width:
|
||
|
|
self.write_indent()
|
||
|
|
self.states.append(self.expect_flow_sequence_item)
|
||
|
|
self.expect_node(sequence=True)
|
||
|
|
|
||
|
|
def expect_flow_sequence_item(self):
|
||
|
|
# type: () -> None
|
||
|
|
if isinstance(self.event, SequenceEndEvent):
|
||
|
|
self.indent = self.indents.pop()
|
||
|
|
popped = self.flow_context.pop()
|
||
|
|
assert popped == "["
|
||
|
|
if self.canonical:
|
||
|
|
self.write_indicator(u",", False)
|
||
|
|
self.write_indent()
|
||
|
|
self.write_indicator(u"]", False)
|
||
|
|
if self.event.comment and self.event.comment[0]:
|
||
|
|
# eol comment on flow sequence
|
||
|
|
self.write_post_comment(self.event)
|
||
|
|
else:
|
||
|
|
self.no_newline = False
|
||
|
|
self.state = self.states.pop()
|
||
|
|
else:
|
||
|
|
self.write_indicator(u",", False)
|
||
|
|
if self.canonical or self.column > self.best_width:
|
||
|
|
self.write_indent()
|
||
|
|
self.states.append(self.expect_flow_sequence_item)
|
||
|
|
self.expect_node(sequence=True)
|
||
|
|
|
||
|
|
# Flow mapping handlers.
|
||
|
|
|
||
|
|
def expect_flow_mapping(self, single=False):
|
||
|
|
# type: (Optional[bool]) -> None
|
||
|
|
ind = self.indents.seq_flow_align(self.best_sequence_indent, self.column)
|
||
|
|
map_init = u"{"
|
||
|
|
if (
|
||
|
|
single
|
||
|
|
and self.flow_level
|
||
|
|
and self.flow_context[-1] == "["
|
||
|
|
and not self.canonical
|
||
|
|
and not self.brace_single_entry_mapping_in_flow_sequence
|
||
|
|
):
|
||
|
|
# single map item with flow context, no curly braces necessary
|
||
|
|
map_init = u""
|
||
|
|
self.write_indicator(u" " * ind + map_init, True, whitespace=True)
|
||
|
|
self.flow_context.append(map_init)
|
||
|
|
self.increase_indent(flow=True, sequence=False)
|
||
|
|
self.state = self.expect_first_flow_mapping_key
|
||
|
|
|
||
|
|
def expect_first_flow_mapping_key(self):
|
||
|
|
# type: () -> None
|
||
|
|
if isinstance(self.event, MappingEndEvent):
|
||
|
|
self.indent = self.indents.pop()
|
||
|
|
popped = self.flow_context.pop()
|
||
|
|
assert popped == "{" # empty flow mapping
|
||
|
|
self.write_indicator(u"}", False)
|
||
|
|
if self.event.comment and self.event.comment[0]:
|
||
|
|
# eol comment on empty mapping
|
||
|
|
self.write_post_comment(self.event)
|
||
|
|
elif self.flow_level == 0:
|
||
|
|
self.write_line_break()
|
||
|
|
self.state = self.states.pop()
|
||
|
|
else:
|
||
|
|
if self.canonical or self.column > self.best_width:
|
||
|
|
self.write_indent()
|
||
|
|
if not self.canonical and self.check_simple_key():
|
||
|
|
self.states.append(self.expect_flow_mapping_simple_value)
|
||
|
|
self.expect_node(mapping=True, simple_key=True)
|
||
|
|
else:
|
||
|
|
self.write_indicator(u"?", True)
|
||
|
|
self.states.append(self.expect_flow_mapping_value)
|
||
|
|
self.expect_node(mapping=True)
|
||
|
|
|
||
|
|
def expect_flow_mapping_key(self):
|
||
|
|
# type: () -> None
|
||
|
|
if isinstance(self.event, MappingEndEvent):
|
||
|
|
# if self.event.comment and self.event.comment[1]:
|
||
|
|
# self.write_pre_comment(self.event)
|
||
|
|
self.indent = self.indents.pop()
|
||
|
|
popped = self.flow_context.pop()
|
||
|
|
assert popped in [u"{", u""]
|
||
|
|
if self.canonical:
|
||
|
|
self.write_indicator(u",", False)
|
||
|
|
self.write_indent()
|
||
|
|
if popped != u"":
|
||
|
|
self.write_indicator(u"}", False)
|
||
|
|
if self.event.comment and self.event.comment[0]:
|
||
|
|
# eol comment on flow mapping, never reached on empty mappings
|
||
|
|
self.write_post_comment(self.event)
|
||
|
|
else:
|
||
|
|
self.no_newline = False
|
||
|
|
self.state = self.states.pop()
|
||
|
|
else:
|
||
|
|
self.write_indicator(u",", False)
|
||
|
|
if self.canonical or self.column > self.best_width:
|
||
|
|
self.write_indent()
|
||
|
|
if not self.canonical and self.check_simple_key():
|
||
|
|
self.states.append(self.expect_flow_mapping_simple_value)
|
||
|
|
self.expect_node(mapping=True, simple_key=True)
|
||
|
|
else:
|
||
|
|
self.write_indicator(u"?", True)
|
||
|
|
self.states.append(self.expect_flow_mapping_value)
|
||
|
|
self.expect_node(mapping=True)
|
||
|
|
|
||
|
|
def expect_flow_mapping_simple_value(self):
|
||
|
|
# type: () -> None
|
||
|
|
self.write_indicator(self.prefixed_colon, False)
|
||
|
|
self.states.append(self.expect_flow_mapping_key)
|
||
|
|
self.expect_node(mapping=True)
|
||
|
|
|
||
|
|
def expect_flow_mapping_value(self):
|
||
|
|
# type: () -> None
|
||
|
|
if self.canonical or self.column > self.best_width:
|
||
|
|
self.write_indent()
|
||
|
|
self.write_indicator(self.prefixed_colon, True)
|
||
|
|
self.states.append(self.expect_flow_mapping_key)
|
||
|
|
self.expect_node(mapping=True)
|
||
|
|
|
||
|
|
# Block sequence handlers.
|
||
|
|
|
||
|
|
def expect_block_sequence(self):
|
||
|
|
# type: () -> None
|
||
|
|
if self.mapping_context:
|
||
|
|
indentless = not self.indention
|
||
|
|
else:
|
||
|
|
indentless = False
|
||
|
|
if not self.compact_seq_seq and self.column != 0:
|
||
|
|
self.write_line_break()
|
||
|
|
self.increase_indent(flow=False, sequence=True, indentless=indentless)
|
||
|
|
self.state = self.expect_first_block_sequence_item
|
||
|
|
|
||
|
|
def expect_first_block_sequence_item(self):
|
||
|
|
# type: () -> Any
|
||
|
|
return self.expect_block_sequence_item(first=True)
|
||
|
|
|
||
|
|
def expect_block_sequence_item(self, first=False):
|
||
|
|
# type: (bool) -> None
|
||
|
|
if not first and isinstance(self.event, SequenceEndEvent):
|
||
|
|
if self.event.comment and self.event.comment[1]:
|
||
|
|
# final comments on a block list e.g. empty line
|
||
|
|
self.write_pre_comment(self.event)
|
||
|
|
self.indent = self.indents.pop()
|
||
|
|
self.state = self.states.pop()
|
||
|
|
self.no_newline = False
|
||
|
|
else:
|
||
|
|
if self.event.comment and self.event.comment[1]:
|
||
|
|
self.write_pre_comment(self.event)
|
||
|
|
nonl = self.no_newline if self.column == 0 else False
|
||
|
|
self.write_indent()
|
||
|
|
ind = self.sequence_dash_offset # if len(self.indents) > 1 else 0
|
||
|
|
self.write_indicator(u" " * ind + u"-", True, indention=True)
|
||
|
|
if nonl or self.sequence_dash_offset + 2 > self.best_sequence_indent:
|
||
|
|
self.no_newline = True
|
||
|
|
self.states.append(self.expect_block_sequence_item)
|
||
|
|
self.expect_node(sequence=True)
|
||
|
|
|
||
|
|
# Block mapping handlers.
|
||
|
|
|
||
|
|
def expect_block_mapping(self):
|
||
|
|
# type: () -> None
|
||
|
|
if not self.mapping_context and not (self.compact_seq_map or self.column == 0):
|
||
|
|
self.write_line_break()
|
||
|
|
self.increase_indent(flow=False, sequence=False)
|
||
|
|
self.state = self.expect_first_block_mapping_key
|
||
|
|
|
||
|
|
def expect_first_block_mapping_key(self):
|
||
|
|
# type: () -> None
|
||
|
|
return self.expect_block_mapping_key(first=True)
|
||
|
|
|
||
|
|
def expect_block_mapping_key(self, first=False):
|
||
|
|
# type: (Any) -> None
|
||
|
|
if not first and isinstance(self.event, MappingEndEvent):
|
||
|
|
if self.event.comment and self.event.comment[1]:
|
||
|
|
# final comments from a doc
|
||
|
|
self.write_pre_comment(self.event)
|
||
|
|
self.indent = self.indents.pop()
|
||
|
|
self.state = self.states.pop()
|
||
|
|
else:
|
||
|
|
if self.event.comment and self.event.comment[1]:
|
||
|
|
# final comments from a doc
|
||
|
|
self.write_pre_comment(self.event)
|
||
|
|
self.write_indent()
|
||
|
|
if self.check_simple_key():
|
||
|
|
if not isinstance(
|
||
|
|
self.event, (SequenceStartEvent, MappingStartEvent)
|
||
|
|
): # sequence keys
|
||
|
|
try:
|
||
|
|
if self.event.style == "?":
|
||
|
|
self.write_indicator(u"?", True, indention=True)
|
||
|
|
except AttributeError: # aliases have no style
|
||
|
|
pass
|
||
|
|
self.states.append(self.expect_block_mapping_simple_value)
|
||
|
|
self.expect_node(mapping=True, simple_key=True)
|
||
|
|
if isinstance(self.event, AliasEvent):
|
||
|
|
self.stream.write(u" ")
|
||
|
|
else:
|
||
|
|
self.write_indicator(u"?", True, indention=True)
|
||
|
|
self.states.append(self.expect_block_mapping_value)
|
||
|
|
self.expect_node(mapping=True)
|
||
|
|
|
||
|
|
def expect_block_mapping_simple_value(self):
|
||
|
|
# type: () -> None
|
||
|
|
if getattr(self.event, "style", None) != "?":
|
||
|
|
# prefix = u''
|
||
|
|
if self.indent == 0 and self.top_level_colon_align is not None:
|
||
|
|
# write non-prefixed colon
|
||
|
|
c = u" " * (self.top_level_colon_align - self.column) + self.colon
|
||
|
|
else:
|
||
|
|
c = self.prefixed_colon
|
||
|
|
self.write_indicator(c, False)
|
||
|
|
self.states.append(self.expect_block_mapping_key)
|
||
|
|
self.expect_node(mapping=True)
|
||
|
|
|
||
|
|
def expect_block_mapping_value(self):
|
||
|
|
# type: () -> None
|
||
|
|
self.write_indent()
|
||
|
|
self.write_indicator(self.prefixed_colon, True, indention=True)
|
||
|
|
self.states.append(self.expect_block_mapping_key)
|
||
|
|
self.expect_node(mapping=True)
|
||
|
|
|
||
|
|
# Checkers.
|
||
|
|
|
||
|
|
def check_empty_sequence(self):
|
||
|
|
# type: () -> bool
|
||
|
|
return (
|
||
|
|
isinstance(self.event, SequenceStartEvent)
|
||
|
|
and bool(self.events)
|
||
|
|
and isinstance(self.events[0], SequenceEndEvent)
|
||
|
|
)
|
||
|
|
|
||
|
|
def check_empty_mapping(self):
|
||
|
|
# type: () -> bool
|
||
|
|
return (
|
||
|
|
isinstance(self.event, MappingStartEvent)
|
||
|
|
and bool(self.events)
|
||
|
|
and isinstance(self.events[0], MappingEndEvent)
|
||
|
|
)
|
||
|
|
|
||
|
|
def check_empty_document(self):
|
||
|
|
# type: () -> bool
|
||
|
|
if not isinstance(self.event, DocumentStartEvent) or not self.events:
|
||
|
|
return False
|
||
|
|
event = self.events[0]
|
||
|
|
return (
|
||
|
|
isinstance(event, ScalarEvent)
|
||
|
|
and event.anchor is None
|
||
|
|
and event.tag is None
|
||
|
|
and event.implicit
|
||
|
|
and event.value == ""
|
||
|
|
)
|
||
|
|
|
||
|
|
def check_simple_key(self):
|
||
|
|
# type: () -> bool
|
||
|
|
length = 0
|
||
|
|
if isinstance(self.event, NodeEvent) and self.event.anchor is not None:
|
||
|
|
if self.prepared_anchor is None:
|
||
|
|
self.prepared_anchor = self.prepare_anchor(self.event.anchor)
|
||
|
|
length += len(self.prepared_anchor)
|
||
|
|
if (
|
||
|
|
isinstance(self.event, (ScalarEvent, CollectionStartEvent))
|
||
|
|
and self.event.tag is not None
|
||
|
|
):
|
||
|
|
if self.prepared_tag is None:
|
||
|
|
self.prepared_tag = self.prepare_tag(self.event.tag)
|
||
|
|
length += len(self.prepared_tag)
|
||
|
|
if isinstance(self.event, ScalarEvent):
|
||
|
|
if self.analysis is None:
|
||
|
|
self.analysis = self.analyze_scalar(self.event.value)
|
||
|
|
length += len(self.analysis.scalar)
|
||
|
|
return length < self.MAX_SIMPLE_KEY_LENGTH and (
|
||
|
|
isinstance(self.event, AliasEvent)
|
||
|
|
or (
|
||
|
|
isinstance(self.event, SequenceStartEvent)
|
||
|
|
and self.event.flow_style is True
|
||
|
|
)
|
||
|
|
or (
|
||
|
|
isinstance(self.event, MappingStartEvent)
|
||
|
|
and self.event.flow_style is True
|
||
|
|
)
|
||
|
|
or (
|
||
|
|
isinstance(self.event, ScalarEvent)
|
||
|
|
# if there is an explicit style for an empty string, it is a simple key
|
||
|
|
and not (self.analysis.empty and self.style and self.style not in "'\"")
|
||
|
|
and not self.analysis.multiline
|
||
|
|
)
|
||
|
|
or self.check_empty_sequence()
|
||
|
|
or self.check_empty_mapping()
|
||
|
|
)
|
||
|
|
|
||
|
|
# Anchor, Tag, and Scalar processors.
|
||
|
|
|
||
|
|
def process_anchor(self, indicator):
|
||
|
|
# type: (Any) -> bool
|
||
|
|
if self.event.anchor is None:
|
||
|
|
self.prepared_anchor = None
|
||
|
|
return False
|
||
|
|
if self.prepared_anchor is None:
|
||
|
|
self.prepared_anchor = self.prepare_anchor(self.event.anchor)
|
||
|
|
if self.prepared_anchor:
|
||
|
|
self.write_indicator(indicator + self.prepared_anchor, True)
|
||
|
|
# issue 288
|
||
|
|
self.no_newline = False
|
||
|
|
self.prepared_anchor = None
|
||
|
|
return True
|
||
|
|
|
||
|
|
def process_tag(self):
|
||
|
|
# type: () -> None
|
||
|
|
tag = self.event.tag
|
||
|
|
if isinstance(self.event, ScalarEvent):
|
||
|
|
if self.style is None:
|
||
|
|
self.style = self.choose_scalar_style()
|
||
|
|
if (not self.canonical or tag is None) and (
|
||
|
|
(self.style == "" and self.event.implicit[0])
|
||
|
|
or (self.style != "" and self.event.implicit[1])
|
||
|
|
):
|
||
|
|
self.prepared_tag = None
|
||
|
|
return
|
||
|
|
if self.event.implicit[0] and tag is None:
|
||
|
|
tag = u"!"
|
||
|
|
self.prepared_tag = None
|
||
|
|
else:
|
||
|
|
if (not self.canonical or tag is None) and self.event.implicit:
|
||
|
|
self.prepared_tag = None
|
||
|
|
return
|
||
|
|
if tag is None:
|
||
|
|
raise EmitterError("tag is not specified")
|
||
|
|
if self.prepared_tag is None:
|
||
|
|
self.prepared_tag = self.prepare_tag(tag)
|
||
|
|
if self.prepared_tag:
|
||
|
|
self.write_indicator(self.prepared_tag, True)
|
||
|
|
if (
|
||
|
|
self.sequence_context
|
||
|
|
and not self.flow_level
|
||
|
|
and isinstance(self.event, ScalarEvent)
|
||
|
|
):
|
||
|
|
self.no_newline = True
|
||
|
|
self.prepared_tag = None
|
||
|
|
|
||
|
|
def choose_scalar_style(self):
|
||
|
|
# type: () -> Any
|
||
|
|
if self.analysis is None:
|
||
|
|
self.analysis = self.analyze_scalar(self.event.value)
|
||
|
|
if self.event.style == '"' or self.canonical:
|
||
|
|
return '"'
|
||
|
|
if (not self.event.style or self.event.style == "?") and (
|
||
|
|
self.event.implicit[0] or not self.event.implicit[2]
|
||
|
|
):
|
||
|
|
if not (
|
||
|
|
self.simple_key_context
|
||
|
|
and (self.analysis.empty or self.analysis.multiline)
|
||
|
|
) and (
|
||
|
|
self.flow_level
|
||
|
|
and self.analysis.allow_flow_plain
|
||
|
|
or (not self.flow_level and self.analysis.allow_block_plain)
|
||
|
|
):
|
||
|
|
return ""
|
||
|
|
self.analysis.allow_block = True
|
||
|
|
if self.event.style and self.event.style in "|>":
|
||
|
|
if (
|
||
|
|
not self.flow_level
|
||
|
|
and not self.simple_key_context
|
||
|
|
and self.analysis.allow_block
|
||
|
|
):
|
||
|
|
return self.event.style
|
||
|
|
if not self.event.style and self.analysis.allow_double_quoted:
|
||
|
|
if "'" in self.event.value or "\n" in self.event.value:
|
||
|
|
return '"'
|
||
|
|
if not self.event.style or self.event.style == "'":
|
||
|
|
if self.analysis.allow_single_quoted and not (
|
||
|
|
self.simple_key_context and self.analysis.multiline
|
||
|
|
):
|
||
|
|
return "'"
|
||
|
|
return '"'
|
||
|
|
|
||
|
|
def process_scalar(self):
|
||
|
|
# type: () -> None
|
||
|
|
if self.analysis is None:
|
||
|
|
self.analysis = self.analyze_scalar(self.event.value)
|
||
|
|
if self.style is None:
|
||
|
|
self.style = self.choose_scalar_style()
|
||
|
|
split = not self.simple_key_context
|
||
|
|
# if self.analysis.multiline and split \
|
||
|
|
# and (not self.style or self.style in '\'\"'):
|
||
|
|
# self.write_indent()
|
||
|
|
# nprint('xx', self.sequence_context, self.flow_level)
|
||
|
|
if self.sequence_context and not self.flow_level:
|
||
|
|
self.write_indent()
|
||
|
|
if self.style == '"':
|
||
|
|
self.write_double_quoted(self.analysis.scalar, split)
|
||
|
|
elif self.style == "'":
|
||
|
|
self.write_single_quoted(self.analysis.scalar, split)
|
||
|
|
elif self.style == ">":
|
||
|
|
self.write_folded(self.analysis.scalar)
|
||
|
|
elif self.style == "|":
|
||
|
|
self.write_literal(self.analysis.scalar, self.event.comment)
|
||
|
|
else:
|
||
|
|
self.write_plain(self.analysis.scalar, split)
|
||
|
|
self.analysis = None
|
||
|
|
self.style = None
|
||
|
|
if self.event.comment:
|
||
|
|
self.write_post_comment(self.event)
|
||
|
|
|
||
|
|
# Analyzers.
|
||
|
|
|
||
|
|
def prepare_version(self, version):
|
||
|
|
# type: (Any) -> Any
|
||
|
|
major, minor = version
|
||
|
|
if major != 1:
|
||
|
|
raise EmitterError("unsupported YAML version: %d.%d" % (major, minor))
|
||
|
|
return u"%d.%d" % (major, minor)
|
||
|
|
|
||
|
|
def prepare_tag_handle(self, handle):
|
||
|
|
# type: (Any) -> Any
|
||
|
|
if not handle:
|
||
|
|
raise EmitterError("tag handle must not be empty")
|
||
|
|
if handle[0] != u"!" or handle[-1] != u"!":
|
||
|
|
raise EmitterError(
|
||
|
|
"tag handle must start and end with '!': %r" % (utf8(handle))
|
||
|
|
)
|
||
|
|
for ch in handle[1:-1]:
|
||
|
|
if not (
|
||
|
|
u"0" <= ch <= u"9"
|
||
|
|
or u"A" <= ch <= u"Z"
|
||
|
|
or u"a" <= ch <= u"z"
|
||
|
|
or ch in u"-_"
|
||
|
|
):
|
||
|
|
raise EmitterError(
|
||
|
|
"invalid character %r in the tag handle: %r"
|
||
|
|
% (utf8(ch), utf8(handle))
|
||
|
|
)
|
||
|
|
return handle
|
||
|
|
|
||
|
|
def prepare_tag_prefix(self, prefix):
|
||
|
|
# type: (Any) -> Any
|
||
|
|
if not prefix:
|
||
|
|
raise EmitterError("tag prefix must not be empty")
|
||
|
|
chunks = [] # type: List[Any]
|
||
|
|
start = end = 0
|
||
|
|
if prefix[0] == u"!":
|
||
|
|
end = 1
|
||
|
|
ch_set = u"-;/?:@&=+$,_.~*'()[]"
|
||
|
|
if self.dumper:
|
||
|
|
version = getattr(self.dumper, "version", (1, 2))
|
||
|
|
if version is None or version >= (1, 2):
|
||
|
|
ch_set += u"#"
|
||
|
|
while end < len(prefix):
|
||
|
|
ch = prefix[end]
|
||
|
|
if (
|
||
|
|
u"0" <= ch <= u"9"
|
||
|
|
or u"A" <= ch <= u"Z"
|
||
|
|
or u"a" <= ch <= u"z"
|
||
|
|
or ch in ch_set
|
||
|
|
):
|
||
|
|
end += 1
|
||
|
|
else:
|
||
|
|
if start < end:
|
||
|
|
chunks.append(prefix[start:end])
|
||
|
|
start = end = end + 1
|
||
|
|
data = utf8(ch)
|
||
|
|
for ch in data:
|
||
|
|
chunks.append(u"%%%02X" % ord(ch))
|
||
|
|
if start < end:
|
||
|
|
chunks.append(prefix[start:end])
|
||
|
|
return "".join(chunks)
|
||
|
|
|
||
|
|
def prepare_tag(self, tag):
|
||
|
|
# type: (Any) -> Any
|
||
|
|
if not tag:
|
||
|
|
raise EmitterError("tag must not be empty")
|
||
|
|
if tag == u"!":
|
||
|
|
return tag
|
||
|
|
handle = None
|
||
|
|
suffix = tag
|
||
|
|
prefixes = sorted(self.tag_prefixes.keys())
|
||
|
|
for prefix in prefixes:
|
||
|
|
if tag.startswith(prefix) and (prefix == u"!" or len(prefix) < len(tag)):
|
||
|
|
handle = self.tag_prefixes[prefix]
|
||
|
|
suffix = tag[len(prefix) :]
|
||
|
|
chunks = [] # type: List[Any]
|
||
|
|
start = end = 0
|
||
|
|
ch_set = u"-;/?:@&=+$,_.~*'()[]"
|
||
|
|
if self.dumper:
|
||
|
|
version = getattr(self.dumper, "version", (1, 2))
|
||
|
|
if version is None or version >= (1, 2):
|
||
|
|
ch_set += u"#"
|
||
|
|
while end < len(suffix):
|
||
|
|
ch = suffix[end]
|
||
|
|
if (
|
||
|
|
u"0" <= ch <= u"9"
|
||
|
|
or u"A" <= ch <= u"Z"
|
||
|
|
or u"a" <= ch <= u"z"
|
||
|
|
or ch in ch_set
|
||
|
|
or (ch == u"!" and handle != u"!")
|
||
|
|
):
|
||
|
|
end += 1
|
||
|
|
else:
|
||
|
|
if start < end:
|
||
|
|
chunks.append(suffix[start:end])
|
||
|
|
start = end = end + 1
|
||
|
|
data = utf8(ch)
|
||
|
|
for ch in data:
|
||
|
|
chunks.append(u"%%%02X" % ord(ch))
|
||
|
|
if start < end:
|
||
|
|
chunks.append(suffix[start:end])
|
||
|
|
suffix_text = "".join(chunks)
|
||
|
|
if handle:
|
||
|
|
return u"%s%s" % (handle, suffix_text)
|
||
|
|
else:
|
||
|
|
return u"!<%s>" % suffix_text
|
||
|
|
|
||
|
|
def prepare_anchor(self, anchor):
|
||
|
|
# type: (Any) -> Any
|
||
|
|
if not anchor:
|
||
|
|
raise EmitterError("anchor must not be empty")
|
||
|
|
for ch in anchor:
|
||
|
|
if not check_anchorname_char(ch):
|
||
|
|
raise EmitterError(
|
||
|
|
"invalid character %r in the anchor: %r" % (utf8(ch), utf8(anchor))
|
||
|
|
)
|
||
|
|
return anchor
|
||
|
|
|
||
|
|
def analyze_scalar(self, scalar):
|
||
|
|
# type: (Any) -> Any
|
||
|
|
# Empty scalar is a special case.
|
||
|
|
if not scalar:
|
||
|
|
return ScalarAnalysis(
|
||
|
|
scalar=scalar,
|
||
|
|
empty=True,
|
||
|
|
multiline=False,
|
||
|
|
allow_flow_plain=False,
|
||
|
|
allow_block_plain=True,
|
||
|
|
allow_single_quoted=True,
|
||
|
|
allow_double_quoted=True,
|
||
|
|
allow_block=False,
|
||
|
|
)
|
||
|
|
|
||
|
|
# Indicators and special characters.
|
||
|
|
block_indicators = False
|
||
|
|
flow_indicators = False
|
||
|
|
line_breaks = False
|
||
|
|
special_characters = False
|
||
|
|
|
||
|
|
# Important whitespace combinations.
|
||
|
|
leading_space = False
|
||
|
|
leading_break = False
|
||
|
|
trailing_space = False
|
||
|
|
trailing_break = False
|
||
|
|
break_space = False
|
||
|
|
space_break = False
|
||
|
|
|
||
|
|
# Check document indicators.
|
||
|
|
if scalar.startswith(u"---") or scalar.startswith(u"..."):
|
||
|
|
block_indicators = True
|
||
|
|
flow_indicators = True
|
||
|
|
|
||
|
|
# First character or preceded by a whitespace.
|
||
|
|
preceeded_by_whitespace = True
|
||
|
|
|
||
|
|
# Last character or followed by a whitespace.
|
||
|
|
followed_by_whitespace = (
|
||
|
|
len(scalar) == 1 or scalar[1] in u"\0 \t\r\n\x85\u2028\u2029"
|
||
|
|
)
|
||
|
|
|
||
|
|
# The previous character is a space.
|
||
|
|
previous_space = False
|
||
|
|
|
||
|
|
# The previous character is a break.
|
||
|
|
previous_break = False
|
||
|
|
|
||
|
|
index = 0
|
||
|
|
while index < len(scalar):
|
||
|
|
ch = scalar[index]
|
||
|
|
|
||
|
|
# Check for indicators.
|
||
|
|
if index == 0:
|
||
|
|
# Leading indicators are special characters.
|
||
|
|
if ch in u"#,[]{}&*!|>'\"%@`":
|
||
|
|
flow_indicators = True
|
||
|
|
block_indicators = True
|
||
|
|
if ch in u"?:": # ToDo
|
||
|
|
if self.serializer.use_version == (1, 1):
|
||
|
|
flow_indicators = True
|
||
|
|
elif len(scalar) == 1: # single character
|
||
|
|
flow_indicators = True
|
||
|
|
if followed_by_whitespace:
|
||
|
|
block_indicators = True
|
||
|
|
if ch == u"-" and followed_by_whitespace:
|
||
|
|
flow_indicators = True
|
||
|
|
block_indicators = True
|
||
|
|
else:
|
||
|
|
# Some indicators cannot appear within a scalar as well.
|
||
|
|
if ch in u",[]{}": # http://yaml.org/spec/1.2/spec.html#id2788859
|
||
|
|
flow_indicators = True
|
||
|
|
if ch == u"?" and self.serializer.use_version == (1, 1):
|
||
|
|
flow_indicators = True
|
||
|
|
if ch == u":":
|
||
|
|
if followed_by_whitespace:
|
||
|
|
flow_indicators = True
|
||
|
|
block_indicators = True
|
||
|
|
if ch == u"#" and preceeded_by_whitespace:
|
||
|
|
flow_indicators = True
|
||
|
|
block_indicators = True
|
||
|
|
|
||
|
|
# Check for line breaks, special, and unicode characters.
|
||
|
|
if ch in u"\n\x85\u2028\u2029":
|
||
|
|
line_breaks = True
|
||
|
|
if not (ch == u"\n" or u"\x20" <= ch <= u"\x7E"):
|
||
|
|
if (
|
||
|
|
ch == u"\x85"
|
||
|
|
or u"\xA0" <= ch <= u"\uD7FF"
|
||
|
|
or u"\uE000" <= ch <= u"\uFFFD"
|
||
|
|
or (
|
||
|
|
self.unicode_supplementary
|
||
|
|
and (u"\U00010000" <= ch <= u"\U0010FFFF")
|
||
|
|
)
|
||
|
|
) and ch != u"\uFEFF":
|
||
|
|
# unicode_characters = True
|
||
|
|
if not self.allow_unicode:
|
||
|
|
special_characters = True
|
||
|
|
else:
|
||
|
|
special_characters = True
|
||
|
|
|
||
|
|
# Detect important whitespace combinations.
|
||
|
|
if ch == u" ":
|
||
|
|
if index == 0:
|
||
|
|
leading_space = True
|
||
|
|
if index == len(scalar) - 1:
|
||
|
|
trailing_space = True
|
||
|
|
if previous_break:
|
||
|
|
break_space = True
|
||
|
|
previous_space = True
|
||
|
|
previous_break = False
|
||
|
|
elif ch in u"\n\x85\u2028\u2029":
|
||
|
|
if index == 0:
|
||
|
|
leading_break = True
|
||
|
|
if index == len(scalar) - 1:
|
||
|
|
trailing_break = True
|
||
|
|
if previous_space:
|
||
|
|
space_break = True
|
||
|
|
previous_space = False
|
||
|
|
previous_break = True
|
||
|
|
else:
|
||
|
|
previous_space = False
|
||
|
|
previous_break = False
|
||
|
|
|
||
|
|
# Prepare for the next character.
|
||
|
|
index += 1
|
||
|
|
preceeded_by_whitespace = ch in u"\0 \t\r\n\x85\u2028\u2029"
|
||
|
|
followed_by_whitespace = (
|
||
|
|
index + 1 >= len(scalar)
|
||
|
|
or scalar[index + 1] in u"\0 \t\r\n\x85\u2028\u2029"
|
||
|
|
)
|
||
|
|
|
||
|
|
# Let's decide what styles are allowed.
|
||
|
|
allow_flow_plain = True
|
||
|
|
allow_block_plain = True
|
||
|
|
allow_single_quoted = True
|
||
|
|
allow_double_quoted = True
|
||
|
|
allow_block = True
|
||
|
|
|
||
|
|
# Leading and trailing whitespaces are bad for plain scalars.
|
||
|
|
if leading_space or leading_break or trailing_space or trailing_break:
|
||
|
|
allow_flow_plain = allow_block_plain = False
|
||
|
|
|
||
|
|
# We do not permit trailing spaces for block scalars.
|
||
|
|
if trailing_space:
|
||
|
|
allow_block = False
|
||
|
|
|
||
|
|
# Spaces at the beginning of a new line are only acceptable for block
|
||
|
|
# scalars.
|
||
|
|
if break_space:
|
||
|
|
allow_flow_plain = allow_block_plain = allow_single_quoted = False
|
||
|
|
|
||
|
|
# Spaces followed by breaks, as well as special character are only
|
||
|
|
# allowed for double quoted scalars.
|
||
|
|
if special_characters:
|
||
|
|
allow_flow_plain = (
|
||
|
|
allow_block_plain
|
||
|
|
) = allow_single_quoted = allow_block = False
|
||
|
|
elif space_break:
|
||
|
|
allow_flow_plain = allow_block_plain = allow_single_quoted = False
|
||
|
|
if not self.allow_space_break:
|
||
|
|
allow_block = False
|
||
|
|
|
||
|
|
# Although the plain scalar writer supports breaks, we never emit
|
||
|
|
# multiline plain scalars.
|
||
|
|
if line_breaks:
|
||
|
|
allow_flow_plain = allow_block_plain = False
|
||
|
|
|
||
|
|
# Flow indicators are forbidden for flow plain scalars.
|
||
|
|
if flow_indicators:
|
||
|
|
allow_flow_plain = False
|
||
|
|
|
||
|
|
# Block indicators are forbidden for block plain scalars.
|
||
|
|
if block_indicators:
|
||
|
|
allow_block_plain = False
|
||
|
|
|
||
|
|
return ScalarAnalysis(
|
||
|
|
scalar=scalar,
|
||
|
|
empty=False,
|
||
|
|
multiline=line_breaks,
|
||
|
|
allow_flow_plain=allow_flow_plain,
|
||
|
|
allow_block_plain=allow_block_plain,
|
||
|
|
allow_single_quoted=allow_single_quoted,
|
||
|
|
allow_double_quoted=allow_double_quoted,
|
||
|
|
allow_block=allow_block,
|
||
|
|
)
|
||
|
|
|
||
|
|
# Writers.
|
||
|
|
|
||
|
|
def flush_stream(self):
|
||
|
|
# type: () -> None
|
||
|
|
if hasattr(self.stream, "flush"):
|
||
|
|
self.stream.flush()
|
||
|
|
|
||
|
|
def write_stream_start(self):
|
||
|
|
# type: () -> None
|
||
|
|
# Write BOM if needed.
|
||
|
|
if self.encoding and self.encoding.startswith("utf-16"):
|
||
|
|
self.stream.write(u"\uFEFF".encode(self.encoding))
|
||
|
|
|
||
|
|
def write_stream_end(self):
|
||
|
|
# type: () -> None
|
||
|
|
self.flush_stream()
|
||
|
|
|
||
|
|
def write_indicator(
|
||
|
|
self, indicator, need_whitespace, whitespace=False, indention=False
|
||
|
|
):
|
||
|
|
# type: (Any, Any, bool, bool) -> None
|
||
|
|
if self.whitespace or not need_whitespace:
|
||
|
|
data = indicator
|
||
|
|
else:
|
||
|
|
data = u" " + indicator
|
||
|
|
self.whitespace = whitespace
|
||
|
|
self.indention = self.indention and indention
|
||
|
|
self.column += len(data)
|
||
|
|
self.open_ended = False
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
|
||
|
|
def write_indent(self):
|
||
|
|
# type: () -> None
|
||
|
|
indent = self.indent or 0
|
||
|
|
if (
|
||
|
|
not self.indention
|
||
|
|
or self.column > indent
|
||
|
|
or (self.column == indent and not self.whitespace)
|
||
|
|
):
|
||
|
|
if bool(self.no_newline):
|
||
|
|
self.no_newline = False
|
||
|
|
else:
|
||
|
|
self.write_line_break()
|
||
|
|
if self.column < indent:
|
||
|
|
self.whitespace = True
|
||
|
|
data = u" " * (indent - self.column)
|
||
|
|
self.column = indent
|
||
|
|
if self.encoding:
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
|
||
|
|
def write_line_break(self, data=None):
|
||
|
|
# type: (Any) -> None
|
||
|
|
if data is None:
|
||
|
|
data = self.best_line_break
|
||
|
|
self.whitespace = True
|
||
|
|
self.indention = True
|
||
|
|
self.line += 1
|
||
|
|
self.column = 0
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
|
||
|
|
def write_version_directive(self, version_text):
|
||
|
|
# type: (Any) -> None
|
||
|
|
data = u"%%YAML %s" % version_text
|
||
|
|
if self.encoding:
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
self.write_line_break()
|
||
|
|
|
||
|
|
def write_tag_directive(self, handle_text, prefix_text):
|
||
|
|
# type: (Any, Any) -> None
|
||
|
|
data = u"%%TAG %s %s" % (handle_text, prefix_text)
|
||
|
|
if self.encoding:
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
self.write_line_break()
|
||
|
|
|
||
|
|
# Scalar streams.
|
||
|
|
|
||
|
|
def write_single_quoted(self, text, split=True):
|
||
|
|
# type: (Any, Any) -> None
|
||
|
|
if self.root_context:
|
||
|
|
if self.requested_indent is not None:
|
||
|
|
self.write_line_break()
|
||
|
|
if self.requested_indent != 0:
|
||
|
|
self.write_indent()
|
||
|
|
self.write_indicator(u"'", True)
|
||
|
|
spaces = False
|
||
|
|
breaks = False
|
||
|
|
start = end = 0
|
||
|
|
while end <= len(text):
|
||
|
|
ch = None
|
||
|
|
if end < len(text):
|
||
|
|
ch = text[end]
|
||
|
|
if spaces:
|
||
|
|
if ch is None or ch != u" ":
|
||
|
|
if (
|
||
|
|
start + 1 == end
|
||
|
|
and self.column > self.best_width
|
||
|
|
and split
|
||
|
|
and start != 0
|
||
|
|
and end != len(text)
|
||
|
|
):
|
||
|
|
self.write_indent()
|
||
|
|
else:
|
||
|
|
data = text[start:end]
|
||
|
|
self.column += len(data)
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
start = end
|
||
|
|
elif breaks:
|
||
|
|
if ch is None or ch not in u"\n\x85\u2028\u2029":
|
||
|
|
if text[start] == u"\n":
|
||
|
|
self.write_line_break()
|
||
|
|
for br in text[start:end]:
|
||
|
|
if br == u"\n":
|
||
|
|
self.write_line_break()
|
||
|
|
else:
|
||
|
|
self.write_line_break(br)
|
||
|
|
self.write_indent()
|
||
|
|
start = end
|
||
|
|
else:
|
||
|
|
if ch is None or ch in u" \n\x85\u2028\u2029" or ch == u"'":
|
||
|
|
if start < end:
|
||
|
|
data = text[start:end]
|
||
|
|
self.column += len(data)
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
start = end
|
||
|
|
if ch == u"'":
|
||
|
|
data = u"''"
|
||
|
|
self.column += 2
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
start = end + 1
|
||
|
|
if ch is not None:
|
||
|
|
spaces = ch == u" "
|
||
|
|
breaks = ch in u"\n\x85\u2028\u2029"
|
||
|
|
end += 1
|
||
|
|
self.write_indicator(u"'", False)
|
||
|
|
|
||
|
|
ESCAPE_REPLACEMENTS = {
|
||
|
|
u"\0": u"0",
|
||
|
|
u"\x07": u"a",
|
||
|
|
u"\x08": u"b",
|
||
|
|
u"\x09": u"t",
|
||
|
|
u"\x0A": u"n",
|
||
|
|
u"\x0B": u"v",
|
||
|
|
u"\x0C": u"f",
|
||
|
|
u"\x0D": u"r",
|
||
|
|
u"\x1B": u"e",
|
||
|
|
u'"': u'"',
|
||
|
|
u"\\": u"\\",
|
||
|
|
u"\x85": u"N",
|
||
|
|
u"\xA0": u"_",
|
||
|
|
u"\u2028": u"L",
|
||
|
|
u"\u2029": u"P",
|
||
|
|
}
|
||
|
|
|
||
|
|
def write_double_quoted(self, text, split=True):
|
||
|
|
# type: (Any, Any) -> None
|
||
|
|
if self.root_context:
|
||
|
|
if self.requested_indent is not None:
|
||
|
|
self.write_line_break()
|
||
|
|
if self.requested_indent != 0:
|
||
|
|
self.write_indent()
|
||
|
|
self.write_indicator(u'"', True)
|
||
|
|
start = end = 0
|
||
|
|
while end <= len(text):
|
||
|
|
ch = None
|
||
|
|
if end < len(text):
|
||
|
|
ch = text[end]
|
||
|
|
if (
|
||
|
|
ch is None
|
||
|
|
or ch in u'"\\\x85\u2028\u2029\uFEFF'
|
||
|
|
or not (
|
||
|
|
u"\x20" <= ch <= u"\x7E"
|
||
|
|
or (
|
||
|
|
self.allow_unicode
|
||
|
|
and (u"\xA0" <= ch <= u"\uD7FF" or u"\uE000" <= ch <= u"\uFFFD")
|
||
|
|
)
|
||
|
|
)
|
||
|
|
):
|
||
|
|
if start < end:
|
||
|
|
data = text[start:end]
|
||
|
|
self.column += len(data)
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
start = end
|
||
|
|
if ch is not None:
|
||
|
|
if ch in self.ESCAPE_REPLACEMENTS:
|
||
|
|
data = u"\\" + self.ESCAPE_REPLACEMENTS[ch]
|
||
|
|
elif ch <= u"\xFF":
|
||
|
|
data = u"\\x%02X" % ord(ch)
|
||
|
|
elif ch <= u"\uFFFF":
|
||
|
|
data = u"\\u%04X" % ord(ch)
|
||
|
|
else:
|
||
|
|
data = u"\\U%08X" % ord(ch)
|
||
|
|
self.column += len(data)
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
start = end + 1
|
||
|
|
if (
|
||
|
|
0 < end < len(text) - 1
|
||
|
|
and (ch == u" " or start >= end)
|
||
|
|
and self.column + (end - start) > self.best_width
|
||
|
|
and split
|
||
|
|
):
|
||
|
|
data = text[start:end] + u"\\"
|
||
|
|
if start < end:
|
||
|
|
start = end
|
||
|
|
self.column += len(data)
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
self.write_indent()
|
||
|
|
self.whitespace = False
|
||
|
|
self.indention = False
|
||
|
|
if text[start] == u" ":
|
||
|
|
data = u"\\"
|
||
|
|
self.column += len(data)
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
end += 1
|
||
|
|
self.write_indicator(u'"', False)
|
||
|
|
|
||
|
|
def determine_block_hints(self, text):
|
||
|
|
# type: (Any) -> Any
|
||
|
|
indent = 0
|
||
|
|
indicator = u""
|
||
|
|
hints = u""
|
||
|
|
if text:
|
||
|
|
if text[0] in u" \n\x85\u2028\u2029":
|
||
|
|
indent = self.best_sequence_indent
|
||
|
|
hints += text_type(indent)
|
||
|
|
elif self.root_context:
|
||
|
|
for end in ["\n---", "\n..."]:
|
||
|
|
pos = 0
|
||
|
|
while True:
|
||
|
|
pos = text.find(end, pos)
|
||
|
|
if pos == -1:
|
||
|
|
break
|
||
|
|
try:
|
||
|
|
if text[pos + 4] in " \r\n":
|
||
|
|
break
|
||
|
|
except IndexError:
|
||
|
|
pass
|
||
|
|
pos += 1
|
||
|
|
if pos > -1:
|
||
|
|
break
|
||
|
|
if pos > 0:
|
||
|
|
indent = self.best_sequence_indent
|
||
|
|
if text[-1] not in u"\n\x85\u2028\u2029":
|
||
|
|
indicator = u"-"
|
||
|
|
elif len(text) == 1 or text[-2] in u"\n\x85\u2028\u2029":
|
||
|
|
indicator = u"+"
|
||
|
|
hints += indicator
|
||
|
|
return hints, indent, indicator
|
||
|
|
|
||
|
|
def write_folded(self, text):
|
||
|
|
# type: (Any) -> None
|
||
|
|
hints, _indent, _indicator = self.determine_block_hints(text)
|
||
|
|
self.write_indicator(u">" + hints, True)
|
||
|
|
if _indicator == u"+":
|
||
|
|
self.open_ended = True
|
||
|
|
self.write_line_break()
|
||
|
|
leading_space = True
|
||
|
|
spaces = False
|
||
|
|
breaks = True
|
||
|
|
start = end = 0
|
||
|
|
while end <= len(text):
|
||
|
|
ch = None
|
||
|
|
if end < len(text):
|
||
|
|
ch = text[end]
|
||
|
|
if breaks:
|
||
|
|
if ch is None or ch not in u"\n\x85\u2028\u2029\a":
|
||
|
|
if (
|
||
|
|
not leading_space
|
||
|
|
and ch is not None
|
||
|
|
and ch != u" "
|
||
|
|
and text[start] == u"\n"
|
||
|
|
):
|
||
|
|
self.write_line_break()
|
||
|
|
leading_space = ch == u" "
|
||
|
|
for br in text[start:end]:
|
||
|
|
if br == u"\n":
|
||
|
|
self.write_line_break()
|
||
|
|
else:
|
||
|
|
self.write_line_break(br)
|
||
|
|
if ch is not None:
|
||
|
|
self.write_indent()
|
||
|
|
start = end
|
||
|
|
elif spaces:
|
||
|
|
if ch != u" ":
|
||
|
|
if start + 1 == end and self.column > self.best_width:
|
||
|
|
self.write_indent()
|
||
|
|
else:
|
||
|
|
data = text[start:end]
|
||
|
|
self.column += len(data)
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
start = end
|
||
|
|
else:
|
||
|
|
if ch is None or ch in u" \n\x85\u2028\u2029\a":
|
||
|
|
data = text[start:end]
|
||
|
|
self.column += len(data)
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
if ch == u"\a":
|
||
|
|
if end < (len(text) - 1) and not text[end + 2].isspace():
|
||
|
|
self.write_line_break()
|
||
|
|
self.write_indent()
|
||
|
|
end += 2 # \a and the space that is inserted on the fold
|
||
|
|
else:
|
||
|
|
raise EmitterError(
|
||
|
|
"unexcpected fold indicator \\a before space"
|
||
|
|
)
|
||
|
|
if ch is None:
|
||
|
|
self.write_line_break()
|
||
|
|
start = end
|
||
|
|
if ch is not None:
|
||
|
|
breaks = ch in u"\n\x85\u2028\u2029"
|
||
|
|
spaces = ch == u" "
|
||
|
|
end += 1
|
||
|
|
|
||
|
|
def write_literal(self, text, comment=None):
|
||
|
|
# type: (Any, Any) -> None
|
||
|
|
hints, _indent, _indicator = self.determine_block_hints(text)
|
||
|
|
self.write_indicator(u"|" + hints, True)
|
||
|
|
try:
|
||
|
|
comment = comment[1][0]
|
||
|
|
if comment:
|
||
|
|
self.stream.write(comment)
|
||
|
|
except (TypeError, IndexError):
|
||
|
|
pass
|
||
|
|
if _indicator == u"+":
|
||
|
|
self.open_ended = True
|
||
|
|
self.write_line_break()
|
||
|
|
breaks = True
|
||
|
|
start = end = 0
|
||
|
|
while end <= len(text):
|
||
|
|
ch = None
|
||
|
|
if end < len(text):
|
||
|
|
ch = text[end]
|
||
|
|
if breaks:
|
||
|
|
if ch is None or ch not in u"\n\x85\u2028\u2029":
|
||
|
|
for br in text[start:end]:
|
||
|
|
if br == u"\n":
|
||
|
|
self.write_line_break()
|
||
|
|
else:
|
||
|
|
self.write_line_break(br)
|
||
|
|
if ch is not None:
|
||
|
|
if self.root_context:
|
||
|
|
idnx = self.indent if self.indent is not None else 0
|
||
|
|
self.stream.write(u" " * (_indent + idnx))
|
||
|
|
else:
|
||
|
|
self.write_indent()
|
||
|
|
start = end
|
||
|
|
else:
|
||
|
|
if ch is None or ch in u"\n\x85\u2028\u2029":
|
||
|
|
data = text[start:end]
|
||
|
|
if bool(self.encoding):
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
if ch is None:
|
||
|
|
self.write_line_break()
|
||
|
|
start = end
|
||
|
|
if ch is not None:
|
||
|
|
breaks = ch in u"\n\x85\u2028\u2029"
|
||
|
|
end += 1
|
||
|
|
|
||
|
|
def write_plain(self, text, split=True):
|
||
|
|
# type: (Any, Any) -> None
|
||
|
|
if self.root_context:
|
||
|
|
if self.requested_indent is not None:
|
||
|
|
self.write_line_break()
|
||
|
|
if self.requested_indent != 0:
|
||
|
|
self.write_indent()
|
||
|
|
else:
|
||
|
|
self.open_ended = True
|
||
|
|
if not text:
|
||
|
|
return
|
||
|
|
if not self.whitespace:
|
||
|
|
data = u" "
|
||
|
|
self.column += len(data)
|
||
|
|
if self.encoding:
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
self.whitespace = False
|
||
|
|
self.indention = False
|
||
|
|
spaces = False
|
||
|
|
breaks = False
|
||
|
|
start = end = 0
|
||
|
|
while end <= len(text):
|
||
|
|
ch = None
|
||
|
|
if end < len(text):
|
||
|
|
ch = text[end]
|
||
|
|
if spaces:
|
||
|
|
if ch != u" ":
|
||
|
|
if start + 1 == end and self.column > self.best_width and split:
|
||
|
|
self.write_indent()
|
||
|
|
self.whitespace = False
|
||
|
|
self.indention = False
|
||
|
|
else:
|
||
|
|
data = text[start:end]
|
||
|
|
self.column += len(data)
|
||
|
|
if self.encoding:
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
self.stream.write(data)
|
||
|
|
start = end
|
||
|
|
elif breaks:
|
||
|
|
if ch not in u"\n\x85\u2028\u2029": # type: ignore
|
||
|
|
if text[start] == u"\n":
|
||
|
|
self.write_line_break()
|
||
|
|
for br in text[start:end]:
|
||
|
|
if br == u"\n":
|
||
|
|
self.write_line_break()
|
||
|
|
else:
|
||
|
|
self.write_line_break(br)
|
||
|
|
self.write_indent()
|
||
|
|
self.whitespace = False
|
||
|
|
self.indention = False
|
||
|
|
start = end
|
||
|
|
else:
|
||
|
|
if ch is None or ch in u" \n\x85\u2028\u2029":
|
||
|
|
data = text[start:end]
|
||
|
|
self.column += len(data)
|
||
|
|
if self.encoding:
|
||
|
|
data = data.encode(self.encoding)
|
||
|
|
try:
|
||
|
|
self.stream.write(data)
|
||
|
|
except: # NOQA
|
||
|
|
sys.stdout.write(repr(data) + "\n")
|
||
|
|
raise
|
||
|
|
start = end
|
||
|
|
if ch is not None:
|
||
|
|
spaces = ch == u" "
|
||
|
|
breaks = ch in u"\n\x85\u2028\u2029"
|
||
|
|
end += 1
|
||
|
|
|
||
|
|
def write_comment(self, comment, pre=False):
|
||
|
|
# type: (Any, bool) -> None
|
||
|
|
value = comment.value
|
||
|
|
# nprintf('{:02d} {:02d} {!r}'.format(self.column, comment.start_mark.column, value))
|
||
|
|
if not pre and value[-1] == "\n":
|
||
|
|
value = value[:-1]
|
||
|
|
try:
|
||
|
|
# get original column position
|
||
|
|
col = comment.start_mark.column
|
||
|
|
if comment.value and comment.value.startswith("\n"):
|
||
|
|
# never inject extra spaces if the comment starts with a newline
|
||
|
|
# and not a real comment (e.g. if you have an empty line following a key-value
|
||
|
|
col = self.column
|
||
|
|
elif col < self.column + 1:
|
||
|
|
ValueError
|
||
|
|
except ValueError:
|
||
|
|
col = self.column + 1
|
||
|
|
# nprint('post_comment', self.line, self.column, value)
|
||
|
|
try:
|
||
|
|
# at least one space if the current column >= the start column of the comment
|
||
|
|
# but not at the start of a line
|
||
|
|
nr_spaces = col - self.column
|
||
|
|
if self.column and value.strip() and nr_spaces < 1 and value[0] != "\n":
|
||
|
|
nr_spaces = 1
|
||
|
|
value = " " * nr_spaces + value
|
||
|
|
try:
|
||
|
|
if bool(self.encoding):
|
||
|
|
value = value.encode(self.encoding)
|
||
|
|
except UnicodeDecodeError:
|
||
|
|
pass
|
||
|
|
self.stream.write(value)
|
||
|
|
except TypeError:
|
||
|
|
raise
|
||
|
|
if not pre:
|
||
|
|
self.write_line_break()
|
||
|
|
|
||
|
|
def write_pre_comment(self, event):
|
||
|
|
# type: (Any) -> bool
|
||
|
|
comments = event.comment[1]
|
||
|
|
if comments is None:
|
||
|
|
return False
|
||
|
|
try:
|
||
|
|
start_events = (MappingStartEvent, SequenceStartEvent)
|
||
|
|
for comment in comments:
|
||
|
|
if isinstance(event, start_events) and getattr(
|
||
|
|
comment, "pre_done", None
|
||
|
|
):
|
||
|
|
continue
|
||
|
|
if self.column != 0:
|
||
|
|
self.write_line_break()
|
||
|
|
self.write_comment(comment, pre=True)
|
||
|
|
if isinstance(event, start_events):
|
||
|
|
comment.pre_done = True
|
||
|
|
except TypeError:
|
||
|
|
sys.stdout.write("eventtt {} {}".format(type(event), event))
|
||
|
|
raise
|
||
|
|
return True
|
||
|
|
|
||
|
|
def write_post_comment(self, event):
|
||
|
|
# type: (Any) -> bool
|
||
|
|
if self.event.comment[0] is None:
|
||
|
|
return False
|
||
|
|
comment = event.comment[0]
|
||
|
|
self.write_comment(comment)
|
||
|
|
return True
|