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798 lines
28 KiB
798 lines
28 KiB
4 years ago
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# coding: utf-8
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# $Id: __init__.py 8376 2019-08-27 19:49:29Z milde $
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# Author: David Goodger <goodger@python.org>
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# Copyright: This module has been placed in the public domain.
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"""
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Miscellaneous utilities for the documentation utilities.
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"""
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__docformat__ = 'reStructuredText'
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import sys
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import os
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import os.path
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import re
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import itertools
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import warnings
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import unicodedata
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from docutils import ApplicationError, DataError, __version_info__
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from docutils import nodes
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from docutils.nodes import unescape
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import docutils.io
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from docutils.utils.error_reporting import ErrorOutput, SafeString
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if sys.version_info >= (3, 0):
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unicode = str
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class SystemMessage(ApplicationError):
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def __init__(self, system_message, level):
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Exception.__init__(self, system_message.astext())
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self.level = level
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class SystemMessagePropagation(ApplicationError): pass
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class Reporter(object):
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"""
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Info/warning/error reporter and ``system_message`` element generator.
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Five levels of system messages are defined, along with corresponding
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methods: `debug()`, `info()`, `warning()`, `error()`, and `severe()`.
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There is typically one Reporter object per process. A Reporter object is
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instantiated with thresholds for reporting (generating warnings) and
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halting processing (raising exceptions), a switch to turn debug output on
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or off, and an I/O stream for warnings. These are stored as instance
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attributes.
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When a system message is generated, its level is compared to the stored
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thresholds, and a warning or error is generated as appropriate. Debug
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messages are produced if the stored debug switch is on, independently of
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other thresholds. Message output is sent to the stored warning stream if
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not set to ''.
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The Reporter class also employs a modified form of the "Observer" pattern
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[GoF95]_ to track system messages generated. The `attach_observer` method
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should be called before parsing, with a bound method or function which
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accepts system messages. The observer can be removed with
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`detach_observer`, and another added in its place.
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.. [GoF95] Gamma, Helm, Johnson, Vlissides. *Design Patterns: Elements of
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Reusable Object-Oriented Software*. Addison-Wesley, Reading, MA, USA,
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1995.
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"""
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levels = 'DEBUG INFO WARNING ERROR SEVERE'.split()
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"""List of names for system message levels, indexed by level."""
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# system message level constants:
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(DEBUG_LEVEL,
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INFO_LEVEL,
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WARNING_LEVEL,
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ERROR_LEVEL,
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SEVERE_LEVEL) = range(5)
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def __init__(self, source, report_level, halt_level, stream=None,
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debug=False, encoding=None, error_handler='backslashreplace'):
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"""
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:Parameters:
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- `source`: The path to or description of the source data.
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- `report_level`: The level at or above which warning output will
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be sent to `stream`.
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- `halt_level`: The level at or above which `SystemMessage`
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exceptions will be raised, halting execution.
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- `debug`: Show debug (level=0) system messages?
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- `stream`: Where warning output is sent. Can be file-like (has a
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``.write`` method), a string (file name, opened for writing),
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'' (empty string) or `False` (for discarding all stream messages)
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or `None` (implies `sys.stderr`; default).
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- `encoding`: The output encoding.
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- `error_handler`: The error handler for stderr output encoding.
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"""
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self.source = source
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"""The path to or description of the source data."""
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self.error_handler = error_handler
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"""The character encoding error handler."""
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self.debug_flag = debug
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"""Show debug (level=0) system messages?"""
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self.report_level = report_level
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"""The level at or above which warning output will be sent
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to `self.stream`."""
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self.halt_level = halt_level
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"""The level at or above which `SystemMessage` exceptions
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will be raised, halting execution."""
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if not isinstance(stream, ErrorOutput):
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stream = ErrorOutput(stream, encoding, error_handler)
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self.stream = stream
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"""Where warning output is sent."""
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self.encoding = encoding or getattr(stream, 'encoding', 'ascii')
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"""The output character encoding."""
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self.observers = []
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"""List of bound methods or functions to call with each system_message
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created."""
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self.max_level = -1
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"""The highest level system message generated so far."""
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def set_conditions(self, category, report_level, halt_level,
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stream=None, debug=False):
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warnings.warn('docutils.utils.Reporter.set_conditions deprecated; '
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'set attributes via configuration settings or directly',
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DeprecationWarning, stacklevel=2)
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self.report_level = report_level
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self.halt_level = halt_level
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if not isinstance(stream, ErrorOutput):
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stream = ErrorOutput(stream, self.encoding, self.error_handler)
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self.stream = stream
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self.debug_flag = debug
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def attach_observer(self, observer):
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"""
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The `observer` parameter is a function or bound method which takes one
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argument, a `nodes.system_message` instance.
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"""
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self.observers.append(observer)
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def detach_observer(self, observer):
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self.observers.remove(observer)
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def notify_observers(self, message):
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for observer in self.observers:
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observer(message)
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def system_message(self, level, message, *children, **kwargs):
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"""
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Return a system_message object.
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Raise an exception or generate a warning if appropriate.
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"""
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# `message` can be a `string`, `unicode`, or `Exception` instance.
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if isinstance(message, Exception):
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message = SafeString(message)
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attributes = kwargs.copy()
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if 'base_node' in kwargs:
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source, line = get_source_line(kwargs['base_node'])
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del attributes['base_node']
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if source is not None:
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attributes.setdefault('source', source)
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if line is not None:
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attributes.setdefault('line', line)
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# assert source is not None, "node has line- but no source-argument"
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if not 'source' in attributes: # 'line' is absolute line number
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try: # look up (source, line-in-source)
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source, line = self.get_source_and_line(attributes.get('line'))
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except AttributeError:
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source, line = None, None
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if source is not None:
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attributes['source'] = source
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if line is not None:
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attributes['line'] = line
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# assert attributes['line'] is not None, (message, kwargs)
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# assert attributes['source'] is not None, (message, kwargs)
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attributes.setdefault('source', self.source)
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msg = nodes.system_message(message, level=level,
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type=self.levels[level],
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*children, **attributes)
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if self.stream and (level >= self.report_level
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or self.debug_flag and level == self.DEBUG_LEVEL
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or level >= self.halt_level):
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self.stream.write(msg.astext() + '\n')
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if level >= self.halt_level:
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raise SystemMessage(msg, level)
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if level > self.DEBUG_LEVEL or self.debug_flag:
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self.notify_observers(msg)
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self.max_level = max(level, self.max_level)
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return msg
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def debug(self, *args, **kwargs):
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"""
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Level-0, "DEBUG": an internal reporting issue. Typically, there is no
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effect on the processing. Level-0 system messages are handled
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separately from the others.
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"""
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if self.debug_flag:
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return self.system_message(self.DEBUG_LEVEL, *args, **kwargs)
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def info(self, *args, **kwargs):
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"""
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Level-1, "INFO": a minor issue that can be ignored. Typically there is
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no effect on processing, and level-1 system messages are not reported.
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"""
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return self.system_message(self.INFO_LEVEL, *args, **kwargs)
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def warning(self, *args, **kwargs):
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"""
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Level-2, "WARNING": an issue that should be addressed. If ignored,
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there may be unpredictable problems with the output.
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"""
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return self.system_message(self.WARNING_LEVEL, *args, **kwargs)
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def error(self, *args, **kwargs):
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"""
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Level-3, "ERROR": an error that should be addressed. If ignored, the
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output will contain errors.
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"""
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return self.system_message(self.ERROR_LEVEL, *args, **kwargs)
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def severe(self, *args, **kwargs):
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"""
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Level-4, "SEVERE": a severe error that must be addressed. If ignored,
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the output will contain severe errors. Typically level-4 system
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messages are turned into exceptions which halt processing.
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"""
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return self.system_message(self.SEVERE_LEVEL, *args, **kwargs)
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class ExtensionOptionError(DataError): pass
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class BadOptionError(ExtensionOptionError): pass
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class BadOptionDataError(ExtensionOptionError): pass
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class DuplicateOptionError(ExtensionOptionError): pass
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def extract_extension_options(field_list, options_spec):
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"""
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Return a dictionary mapping extension option names to converted values.
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:Parameters:
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- `field_list`: A flat field list without field arguments, where each
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field body consists of a single paragraph only.
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- `options_spec`: Dictionary mapping known option names to a
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conversion function such as `int` or `float`.
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:Exceptions:
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- `KeyError` for unknown option names.
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- `ValueError` for invalid option values (raised by the conversion
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function).
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- `TypeError` for invalid option value types (raised by conversion
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function).
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- `DuplicateOptionError` for duplicate options.
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- `BadOptionError` for invalid fields.
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- `BadOptionDataError` for invalid option data (missing name,
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missing data, bad quotes, etc.).
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"""
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option_list = extract_options(field_list)
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option_dict = assemble_option_dict(option_list, options_spec)
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return option_dict
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def extract_options(field_list):
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"""
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Return a list of option (name, value) pairs from field names & bodies.
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:Parameter:
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`field_list`: A flat field list, where each field name is a single
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word and each field body consists of a single paragraph only.
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:Exceptions:
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- `BadOptionError` for invalid fields.
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- `BadOptionDataError` for invalid option data (missing name,
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missing data, bad quotes, etc.).
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"""
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option_list = []
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for field in field_list:
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if len(field[0].astext().split()) != 1:
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raise BadOptionError(
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'extension option field name may not contain multiple words')
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name = str(field[0].astext().lower())
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body = field[1]
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if len(body) == 0:
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data = None
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elif len(body) > 1 or not isinstance(body[0], nodes.paragraph) \
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or len(body[0]) != 1 or not isinstance(body[0][0], nodes.Text):
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raise BadOptionDataError(
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'extension option field body may contain\n'
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'a single paragraph only (option "%s")' % name)
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else:
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data = body[0][0].astext()
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option_list.append((name, data))
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return option_list
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def assemble_option_dict(option_list, options_spec):
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"""
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Return a mapping of option names to values.
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:Parameters:
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- `option_list`: A list of (name, value) pairs (the output of
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`extract_options()`).
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- `options_spec`: Dictionary mapping known option names to a
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conversion function such as `int` or `float`.
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:Exceptions:
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- `KeyError` for unknown option names.
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- `DuplicateOptionError` for duplicate options.
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- `ValueError` for invalid option values (raised by conversion
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function).
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- `TypeError` for invalid option value types (raised by conversion
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function).
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"""
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options = {}
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for name, value in option_list:
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convertor = options_spec[name] # raises KeyError if unknown
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if convertor is None:
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raise KeyError(name) # or if explicitly disabled
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if name in options:
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raise DuplicateOptionError('duplicate option "%s"' % name)
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try:
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options[name] = convertor(value)
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except (ValueError, TypeError) as detail:
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raise detail.__class__('(option: "%s"; value: %r)\n%s'
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% (name, value, ' '.join(detail.args)))
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return options
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class NameValueError(DataError): pass
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def decode_path(path):
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"""
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Ensure `path` is Unicode. Return `nodes.reprunicode` object.
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Decode file/path string in a failsave manner if not already done.
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"""
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# see also http://article.gmane.org/gmane.text.docutils.user/2905
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if isinstance(path, unicode):
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return path
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try:
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path = path.decode(sys.getfilesystemencoding(), 'strict')
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except AttributeError: # default value None has no decode method
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return nodes.reprunicode(path)
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except UnicodeDecodeError:
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try:
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path = path.decode('utf-8', 'strict')
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except UnicodeDecodeError:
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path = path.decode('ascii', 'replace')
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return nodes.reprunicode(path)
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def extract_name_value(line):
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"""
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Return a list of (name, value) from a line of the form "name=value ...".
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:Exception:
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`NameValueError` for invalid input (missing name, missing data, bad
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quotes, etc.).
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"""
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attlist = []
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while line:
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equals = line.find('=')
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if equals == -1:
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raise NameValueError('missing "="')
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attname = line[:equals].strip()
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if equals == 0 or not attname:
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|
|
raise NameValueError(
|
||
|
|
'missing attribute name before "="')
|
||
|
|
line = line[equals+1:].lstrip()
|
||
|
|
if not line:
|
||
|
|
raise NameValueError(
|
||
|
|
'missing value after "%s="' % attname)
|
||
|
|
if line[0] in '\'"':
|
||
|
|
endquote = line.find(line[0], 1)
|
||
|
|
if endquote == -1:
|
||
|
|
raise NameValueError(
|
||
|
|
'attribute "%s" missing end quote (%s)'
|
||
|
|
% (attname, line[0]))
|
||
|
|
if len(line) > endquote + 1 and line[endquote + 1].strip():
|
||
|
|
raise NameValueError(
|
||
|
|
'attribute "%s" end quote (%s) not followed by '
|
||
|
|
'whitespace' % (attname, line[0]))
|
||
|
|
data = line[1:endquote]
|
||
|
|
line = line[endquote+1:].lstrip()
|
||
|
|
else:
|
||
|
|
space = line.find(' ')
|
||
|
|
if space == -1:
|
||
|
|
data = line
|
||
|
|
line = ''
|
||
|
|
else:
|
||
|
|
data = line[:space]
|
||
|
|
line = line[space+1:].lstrip()
|
||
|
|
attlist.append((attname.lower(), data))
|
||
|
|
return attlist
|
||
|
|
|
||
|
|
def new_reporter(source_path, settings):
|
||
|
|
"""
|
||
|
|
Return a new Reporter object.
|
||
|
|
|
||
|
|
:Parameters:
|
||
|
|
`source` : string
|
||
|
|
The path to or description of the source text of the document.
|
||
|
|
`settings` : optparse.Values object
|
||
|
|
Runtime settings.
|
||
|
|
"""
|
||
|
|
reporter = Reporter(
|
||
|
|
source_path, settings.report_level, settings.halt_level,
|
||
|
|
stream=settings.warning_stream, debug=settings.debug,
|
||
|
|
encoding=settings.error_encoding,
|
||
|
|
error_handler=settings.error_encoding_error_handler)
|
||
|
|
return reporter
|
||
|
|
|
||
|
|
def new_document(source_path, settings=None):
|
||
|
|
"""
|
||
|
|
Return a new empty document object.
|
||
|
|
|
||
|
|
:Parameters:
|
||
|
|
`source_path` : string
|
||
|
|
The path to or description of the source text of the document.
|
||
|
|
`settings` : optparse.Values object
|
||
|
|
Runtime settings. If none are provided, a default core set will
|
||
|
|
be used. If you will use the document object with any Docutils
|
||
|
|
components, you must provide their default settings as well. For
|
||
|
|
example, if parsing, at least provide the parser settings,
|
||
|
|
obtainable as follows::
|
||
|
|
|
||
|
|
settings = docutils.frontend.OptionParser(
|
||
|
|
components=(docutils.parsers.rst.Parser,)
|
||
|
|
).get_default_values()
|
||
|
|
"""
|
||
|
|
from docutils import frontend
|
||
|
|
if settings is None:
|
||
|
|
settings = frontend.OptionParser().get_default_values()
|
||
|
|
source_path = decode_path(source_path)
|
||
|
|
reporter = new_reporter(source_path, settings)
|
||
|
|
document = nodes.document(settings, reporter, source=source_path)
|
||
|
|
document.note_source(source_path, -1)
|
||
|
|
return document
|
||
|
|
|
||
|
|
def clean_rcs_keywords(paragraph, keyword_substitutions):
|
||
|
|
if len(paragraph) == 1 and isinstance(paragraph[0], nodes.Text):
|
||
|
|
textnode = paragraph[0]
|
||
|
|
for pattern, substitution in keyword_substitutions:
|
||
|
|
match = pattern.search(textnode)
|
||
|
|
if match:
|
||
|
|
paragraph[0] = nodes.Text(pattern.sub(substitution, textnode))
|
||
|
|
return
|
||
|
|
|
||
|
|
def relative_path(source, target):
|
||
|
|
"""
|
||
|
|
Build and return a path to `target`, relative to `source` (both files).
|
||
|
|
|
||
|
|
If there is no common prefix, return the absolute path to `target`.
|
||
|
|
"""
|
||
|
|
source_parts = os.path.abspath(source or type(target)('dummy_file')
|
||
|
|
).split(os.sep)
|
||
|
|
target_parts = os.path.abspath(target).split(os.sep)
|
||
|
|
# Check first 2 parts because '/dir'.split('/') == ['', 'dir']:
|
||
|
|
if source_parts[:2] != target_parts[:2]:
|
||
|
|
# Nothing in common between paths.
|
||
|
|
# Return absolute path, using '/' for URLs:
|
||
|
|
return '/'.join(target_parts)
|
||
|
|
source_parts.reverse()
|
||
|
|
target_parts.reverse()
|
||
|
|
while (source_parts and target_parts
|
||
|
|
and source_parts[-1] == target_parts[-1]):
|
||
|
|
# Remove path components in common:
|
||
|
|
source_parts.pop()
|
||
|
|
target_parts.pop()
|
||
|
|
target_parts.reverse()
|
||
|
|
parts = ['..'] * (len(source_parts) - 1) + target_parts
|
||
|
|
return '/'.join(parts)
|
||
|
|
|
||
|
|
def get_stylesheet_reference(settings, relative_to=None):
|
||
|
|
"""
|
||
|
|
Retrieve a stylesheet reference from the settings object.
|
||
|
|
|
||
|
|
Deprecated. Use get_stylesheet_list() instead to
|
||
|
|
enable specification of multiple stylesheets as a comma-separated
|
||
|
|
list.
|
||
|
|
"""
|
||
|
|
if settings.stylesheet_path:
|
||
|
|
assert not settings.stylesheet, (
|
||
|
|
'stylesheet and stylesheet_path are mutually exclusive.')
|
||
|
|
if relative_to == None:
|
||
|
|
relative_to = settings._destination
|
||
|
|
return relative_path(relative_to, settings.stylesheet_path)
|
||
|
|
else:
|
||
|
|
return settings.stylesheet
|
||
|
|
|
||
|
|
# Return 'stylesheet' or 'stylesheet_path' arguments as list.
|
||
|
|
#
|
||
|
|
# The original settings arguments are kept unchanged: you can test
|
||
|
|
# with e.g. ``if settings.stylesheet_path:``
|
||
|
|
#
|
||
|
|
# Differences to ``get_stylesheet_reference``:
|
||
|
|
# * return value is a list
|
||
|
|
# * no re-writing of the path (and therefore no optional argument)
|
||
|
|
# (if required, use ``utils.relative_path(source, target)``
|
||
|
|
# in the calling script)
|
||
|
|
def get_stylesheet_list(settings):
|
||
|
|
"""
|
||
|
|
Retrieve list of stylesheet references from the settings object.
|
||
|
|
"""
|
||
|
|
assert not (settings.stylesheet and settings.stylesheet_path), (
|
||
|
|
'stylesheet and stylesheet_path are mutually exclusive.')
|
||
|
|
stylesheets = settings.stylesheet_path or settings.stylesheet or []
|
||
|
|
# programmatically set default can be string or unicode:
|
||
|
|
if not isinstance(stylesheets, list):
|
||
|
|
stylesheets = [path.strip() for path in stylesheets.split(',')]
|
||
|
|
# expand relative paths if found in stylesheet-dirs:
|
||
|
|
return [find_file_in_dirs(path, settings.stylesheet_dirs)
|
||
|
|
for path in stylesheets]
|
||
|
|
|
||
|
|
def find_file_in_dirs(path, dirs):
|
||
|
|
"""
|
||
|
|
Search for `path` in the list of directories `dirs`.
|
||
|
|
|
||
|
|
Return the first expansion that matches an existing file.
|
||
|
|
"""
|
||
|
|
if os.path.isabs(path):
|
||
|
|
return path
|
||
|
|
for d in dirs:
|
||
|
|
if d == '.':
|
||
|
|
f = path
|
||
|
|
else:
|
||
|
|
d = os.path.expanduser(d)
|
||
|
|
f = os.path.join(d, path)
|
||
|
|
if os.path.exists(f):
|
||
|
|
return f
|
||
|
|
return path
|
||
|
|
|
||
|
|
def get_trim_footnote_ref_space(settings):
|
||
|
|
"""
|
||
|
|
Return whether or not to trim footnote space.
|
||
|
|
|
||
|
|
If trim_footnote_reference_space is not None, return it.
|
||
|
|
|
||
|
|
If trim_footnote_reference_space is None, return False unless the
|
||
|
|
footnote reference style is 'superscript'.
|
||
|
|
"""
|
||
|
|
if settings.trim_footnote_reference_space is None:
|
||
|
|
return hasattr(settings, 'footnote_references') and \
|
||
|
|
settings.footnote_references == 'superscript'
|
||
|
|
else:
|
||
|
|
return settings.trim_footnote_reference_space
|
||
|
|
|
||
|
|
def get_source_line(node):
|
||
|
|
"""
|
||
|
|
Return the "source" and "line" attributes from the `node` given or from
|
||
|
|
its closest ancestor.
|
||
|
|
"""
|
||
|
|
while node:
|
||
|
|
if node.source or node.line:
|
||
|
|
return node.source, node.line
|
||
|
|
node = node.parent
|
||
|
|
return None, None
|
||
|
|
|
||
|
|
def escape2null(text):
|
||
|
|
"""Return a string with escape-backslashes converted to nulls."""
|
||
|
|
parts = []
|
||
|
|
start = 0
|
||
|
|
while True:
|
||
|
|
found = text.find('\\', start)
|
||
|
|
if found == -1:
|
||
|
|
parts.append(text[start:])
|
||
|
|
return ''.join(parts)
|
||
|
|
parts.append(text[start:found])
|
||
|
|
parts.append('\x00' + text[found+1:found+2])
|
||
|
|
start = found + 2 # skip character after escape
|
||
|
|
|
||
|
|
# `unescape` definition moved to `nodes` to avoid circular import dependency.
|
||
|
|
|
||
|
|
def split_escaped_whitespace(text):
|
||
|
|
"""
|
||
|
|
Split `text` on escaped whitespace (null+space or null+newline).
|
||
|
|
Return a list of strings.
|
||
|
|
"""
|
||
|
|
strings = text.split('\x00 ')
|
||
|
|
strings = [string.split('\x00\n') for string in strings]
|
||
|
|
# flatten list of lists of strings to list of strings:
|
||
|
|
return list(itertools.chain(*strings))
|
||
|
|
|
||
|
|
def strip_combining_chars(text):
|
||
|
|
if isinstance(text, str) and sys.version_info < (3, 0):
|
||
|
|
return text
|
||
|
|
return u''.join([c for c in text if not unicodedata.combining(c)])
|
||
|
|
|
||
|
|
def find_combining_chars(text):
|
||
|
|
"""Return indices of all combining chars in Unicode string `text`.
|
||
|
|
|
||
|
|
>>> from docutils.utils import find_combining_chars
|
||
|
|
>>> find_combining_chars(u'A t̆ab̆lĕ')
|
||
|
|
[3, 6, 9]
|
||
|
|
|
||
|
|
"""
|
||
|
|
if isinstance(text, str) and sys.version_info < (3, 0):
|
||
|
|
return []
|
||
|
|
return [i for i,c in enumerate(text) if unicodedata.combining(c)]
|
||
|
|
|
||
|
|
def column_indices(text):
|
||
|
|
"""Indices of Unicode string `text` when skipping combining characters.
|
||
|
|
|
||
|
|
>>> from docutils.utils import column_indices
|
||
|
|
>>> column_indices(u'A t̆ab̆lĕ')
|
||
|
|
[0, 1, 2, 4, 5, 7, 8]
|
||
|
|
|
||
|
|
"""
|
||
|
|
# TODO: account for asian wide chars here instead of using dummy
|
||
|
|
# replacements in the tableparser?
|
||
|
|
string_indices = list(range(len(text)))
|
||
|
|
for index in find_combining_chars(text):
|
||
|
|
string_indices[index] = None
|
||
|
|
return [i for i in string_indices if i is not None]
|
||
|
|
|
||
|
|
east_asian_widths = {'W': 2, # Wide
|
||
|
|
'F': 2, # Full-width (wide)
|
||
|
|
'Na': 1, # Narrow
|
||
|
|
'H': 1, # Half-width (narrow)
|
||
|
|
'N': 1, # Neutral (not East Asian, treated as narrow)
|
||
|
|
'A': 1} # Ambiguous (s/b wide in East Asian context,
|
||
|
|
# narrow otherwise, but that doesn't work)
|
||
|
|
"""Mapping of result codes from `unicodedata.east_asian_widt()` to character
|
||
|
|
column widths."""
|
||
|
|
|
||
|
|
def column_width(text):
|
||
|
|
"""Return the column width of text.
|
||
|
|
|
||
|
|
Correct ``len(text)`` for wide East Asian and combining Unicode chars.
|
||
|
|
"""
|
||
|
|
if isinstance(text, str) and sys.version_info < (3, 0):
|
||
|
|
return len(text)
|
||
|
|
width = sum([east_asian_widths[unicodedata.east_asian_width(c)]
|
||
|
|
for c in text])
|
||
|
|
# correction for combining chars:
|
||
|
|
width -= len(find_combining_chars(text))
|
||
|
|
return width
|
||
|
|
|
||
|
|
def uniq(L):
|
||
|
|
r = []
|
||
|
|
for item in L:
|
||
|
|
if not item in r:
|
||
|
|
r.append(item)
|
||
|
|
return r
|
||
|
|
|
||
|
|
def unique_combinations(items, n):
|
||
|
|
"""Return `itertools.combinations`."""
|
||
|
|
warnings.warn('docutils.utils.unique_combinations is deprecated; '
|
||
|
|
'use itertools.combinations directly.',
|
||
|
|
DeprecationWarning, stacklevel=2)
|
||
|
|
return itertools.combinations(items, n)
|
||
|
|
|
||
|
|
def normalize_language_tag(tag):
|
||
|
|
"""Return a list of normalized combinations for a `BCP 47` language tag.
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
>>> from docutils.utils import normalize_language_tag
|
||
|
|
>>> normalize_language_tag('de_AT-1901')
|
||
|
|
['de-at-1901', 'de-at', 'de-1901', 'de']
|
||
|
|
>>> normalize_language_tag('de-CH-x_altquot')
|
||
|
|
['de-ch-x-altquot', 'de-ch', 'de-x-altquot', 'de']
|
||
|
|
|
||
|
|
"""
|
||
|
|
# normalize:
|
||
|
|
tag = tag.lower().replace('-', '_')
|
||
|
|
# split (except singletons, which mark the following tag as non-standard):
|
||
|
|
tag = re.sub(r'_([a-zA-Z0-9])_', r'_\1-', tag)
|
||
|
|
subtags = [subtag for subtag in tag.split('_')]
|
||
|
|
base_tag = (subtags.pop(0),)
|
||
|
|
# find all combinations of subtags
|
||
|
|
taglist = []
|
||
|
|
for n in range(len(subtags), 0, -1):
|
||
|
|
# for tags in unique_combinations(subtags, n):
|
||
|
|
for tags in itertools.combinations(subtags, n):
|
||
|
|
taglist.append('-'.join(base_tag+tags))
|
||
|
|
taglist += base_tag
|
||
|
|
return taglist
|
||
|
|
|
||
|
|
|
||
|
|
class DependencyList(object):
|
||
|
|
|
||
|
|
"""
|
||
|
|
List of dependencies, with file recording support.
|
||
|
|
|
||
|
|
Note that the output file is not automatically closed. You have
|
||
|
|
to explicitly call the close() method.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, output_file=None, dependencies=[]):
|
||
|
|
"""
|
||
|
|
Initialize the dependency list, automatically setting the
|
||
|
|
output file to `output_file` (see `set_output()`) and adding
|
||
|
|
all supplied dependencies.
|
||
|
|
"""
|
||
|
|
self.set_output(output_file)
|
||
|
|
for i in dependencies:
|
||
|
|
self.add(i)
|
||
|
|
|
||
|
|
def set_output(self, output_file):
|
||
|
|
"""
|
||
|
|
Set the output file and clear the list of already added
|
||
|
|
dependencies.
|
||
|
|
|
||
|
|
`output_file` must be a string. The specified file is
|
||
|
|
immediately overwritten.
|
||
|
|
|
||
|
|
If output_file is '-', the output will be written to stdout.
|
||
|
|
If it is None, no file output is done when calling add().
|
||
|
|
"""
|
||
|
|
self.list = []
|
||
|
|
if output_file:
|
||
|
|
if output_file == '-':
|
||
|
|
of = None
|
||
|
|
else:
|
||
|
|
of = output_file
|
||
|
|
self.file = docutils.io.FileOutput(destination_path=of,
|
||
|
|
encoding='utf8', autoclose=False)
|
||
|
|
else:
|
||
|
|
self.file = None
|
||
|
|
|
||
|
|
def add(self, *filenames):
|
||
|
|
"""
|
||
|
|
If the dependency `filename` has not already been added,
|
||
|
|
append it to self.list and print it to self.file if self.file
|
||
|
|
is not None.
|
||
|
|
"""
|
||
|
|
for filename in filenames:
|
||
|
|
if not filename in self.list:
|
||
|
|
self.list.append(filename)
|
||
|
|
if self.file is not None:
|
||
|
|
self.file.write(filename+'\n')
|
||
|
|
|
||
|
|
def close(self):
|
||
|
|
"""
|
||
|
|
Close the output file.
|
||
|
|
"""
|
||
|
|
self.file.close()
|
||
|
|
self.file = None
|
||
|
|
|
||
|
|
def __repr__(self):
|
||
|
|
try:
|
||
|
|
output_file = self.file.name
|
||
|
|
except AttributeError:
|
||
|
|
output_file = None
|
||
|
|
return '%s(%r, %s)' % (self.__class__.__name__, output_file, self.list)
|
||
|
|
|
||
|
|
|
||
|
|
release_level_abbreviations = {
|
||
|
|
'alpha': 'a',
|
||
|
|
'beta': 'b',
|
||
|
|
'candidate': 'rc',
|
||
|
|
'final': '',}
|
||
|
|
|
||
|
|
def version_identifier(version_info=None):
|
||
|
|
"""
|
||
|
|
Return a version identifier string built from `version_info`, a
|
||
|
|
`docutils.VersionInfo` namedtuple instance or compatible tuple. If
|
||
|
|
`version_info` is not provided, by default return a version identifier
|
||
|
|
string based on `docutils.__version_info__` (i.e. the current Docutils
|
||
|
|
version).
|
||
|
|
"""
|
||
|
|
if version_info is None:
|
||
|
|
version_info = __version_info__
|
||
|
|
if version_info.micro:
|
||
|
|
micro = '.%s' % version_info.micro
|
||
|
|
else:
|
||
|
|
# 0 is omitted:
|
||
|
|
micro = ''
|
||
|
|
releaselevel = release_level_abbreviations[version_info.releaselevel]
|
||
|
|
if version_info.serial:
|
||
|
|
serial = version_info.serial
|
||
|
|
else:
|
||
|
|
# 0 is omitted:
|
||
|
|
serial = ''
|
||
|
|
if version_info.release:
|
||
|
|
dev = ''
|
||
|
|
else:
|
||
|
|
dev = '.dev'
|
||
|
|
version = '%s.%s%s%s%s%s' % (
|
||
|
|
version_info.major,
|
||
|
|
version_info.minor,
|
||
|
|
micro,
|
||
|
|
releaselevel,
|
||
|
|
serial,
|
||
|
|
dev)
|
||
|
|
return version
|