Source code for sphinx.config

# -*- coding: utf-8 -*-
"""
    sphinx.config
    ~~~~~~~~~~~~~

    Build configuration file handling.

    :copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import re
import traceback
import types
import warnings
from collections import OrderedDict
from os import path, getenv
from typing import Any, NamedTuple, Union

from six import (
    PY2, PY3, iteritems, string_types, binary_type, text_type, integer_types, class_types
)

from sphinx.deprecation import RemovedInSphinx30Warning
from sphinx.errors import ConfigError, ExtensionError
from sphinx.locale import _, __
from sphinx.util import logging
from sphinx.util.i18n import format_date
from sphinx.util.osutil import cd
from sphinx.util.pycompat import execfile_, NoneType

if False:
    # For type annotation
    from typing import Any, Callable, Dict, Generator, Iterator, List, Tuple, Union  # NOQA
    from sphinx.application import Sphinx  # NOQA
    from sphinx.util.tags import Tags  # NOQA

logger = logging.getLogger(__name__)

CONFIG_FILENAME = 'conf.py'
UNSERIALIZEABLE_TYPES = class_types + (types.ModuleType, types.FunctionType)
copyright_year_re = re.compile(r'^((\d{4}-)?)(\d{4})(?=[ ,])')

if PY3:
    unicode = str  # special alias for static typing...

ConfigValue = NamedTuple('ConfigValue', [('name', str),
                                         ('value', Any),
                                         ('rebuild', Union[bool, unicode])])


class ENUM(object):
    """represents the config value should be a one of candidates.

    Example:
        app.add_config_value('latex_show_urls', 'no', None, ENUM('no', 'footnote', 'inline'))
    """
    def __init__(self, *candidates):
        # type: (unicode) -> None
        self.candidates = candidates

    def match(self, value):
        # type: (Union[unicode,List,Tuple]) -> bool
        if isinstance(value, (list, tuple)):
            return all(item in self.candidates for item in value)
        else:
            return value in self.candidates


string_classes = [text_type]  # type: List
if PY2:
    string_classes.append(binary_type)  # => [str, unicode]


[docs]class Config(object): """Configuration file abstraction. The config object makes the values of all config values available as attributes. It is exposed via the :py:attr:`sphinx.application.Application.config` and :py:attr:`sphinx.environment.Environment.config` attributes. For example, to get the value of :confval:`language`, use either ``app.config.language`` or ``env.config.language``. """ # the values are: (default, what needs to be rebuilt if changed) # If you add a value here, don't forget to include it in the # quickstart.py file template as well as in the docs! config_values = dict( # general options project = ('Python', 'env', []), author = ('unknown', 'env', []), copyright = ('', 'html', []), version = ('', 'env', []), release = ('', 'env', []), today = ('', 'env', []), # the real default is locale-dependent today_fmt = (None, 'env', string_classes), language = (None, 'env', string_classes), locale_dirs = (['locales'], 'env', []), figure_language_filename = (u'{root}.{language}{ext}', 'env', [str]), master_doc = ('contents', 'env', []), source_suffix = ({'.rst': 'restructuredtext'}, 'env', Any), source_encoding = ('utf-8-sig', 'env', []), source_parsers = ({}, 'env', []), exclude_patterns = ([], 'env', []), default_role = (None, 'env', string_classes), add_function_parentheses = (True, 'env', []), add_module_names = (True, 'env', []), trim_footnote_reference_space = (False, 'env', []), show_authors = (False, 'env', []), pygments_style = (None, 'html', string_classes), highlight_language = ('default', 'env', []), highlight_options = ({}, 'env', []), templates_path = ([], 'html', []), template_bridge = (None, 'html', string_classes), keep_warnings = (False, 'env', []), suppress_warnings = ([], 'env', []), modindex_common_prefix = ([], 'html', []), rst_epilog = (None, 'env', string_classes), rst_prolog = (None, 'env', string_classes), trim_doctest_flags = (True, 'env', []), primary_domain = ('py', 'env', [NoneType]), # type: ignore needs_sphinx = (None, None, string_classes), needs_extensions = ({}, None, []), manpages_url = (None, 'env', []), nitpicky = (False, None, []), nitpick_ignore = ([], None, []), numfig = (False, 'env', []), numfig_secnum_depth = (1, 'env', []), numfig_format = ({}, 'env', []), # will be initialized in init_numfig_format() math_number_all = (False, 'env', []), math_eqref_format = (None, 'env', string_classes), math_numfig = (True, 'env', []), tls_verify = (True, 'env', []), tls_cacerts = (None, 'env', []), smartquotes = (True, 'env', []), smartquotes_action = ('qDe', 'env', []), smartquotes_excludes = ({'languages': ['ja'], 'builders': ['man', 'text']}, 'env', []), ) # type: Dict[unicode, Tuple] def __init__(self, *args): # type: (Any) -> None if len(args) == 4: # old style arguments: (dirname, filename, overrides, tags) warnings.warn('The argument of Config() class has been changed. ' 'Use Config.read() to read configuration from conf.py.', RemovedInSphinx30Warning) dirname, filename, overrides, tags = args if dirname is None: config = {} # type: Dict[unicode, Any] else: config = eval_config_file(path.join(dirname, filename), tags) else: # new style arguments: (config={}, overrides={}) if len(args) == 0: config, overrides = {}, {} elif len(args) == 1: config, overrides = args[0], {} else: config, overrides = args[:2] self.overrides = overrides self.values = Config.config_values.copy() self._raw_config = config self.setup = config.get('setup', None) # type: Callable if 'extensions' in overrides: if isinstance(overrides['extensions'], string_types): config['extensions'] = overrides.pop('extensions').split(',') else: config['extensions'] = overrides.pop('extensions') self.extensions = config.get('extensions', []) # type: List[unicode] @classmethod def read(cls, confdir, overrides=None, tags=None): # type: (unicode, Dict, Tags) -> Config """Create a Config object from configuration file.""" filename = path.join(confdir, CONFIG_FILENAME) namespace = eval_config_file(filename, tags) return cls(namespace, overrides or {}) def check_types(self): # type: () -> None warnings.warn('Config.check_types() is deprecated. Use check_confval_types() instead.', RemovedInSphinx30Warning) check_confval_types(None, self) def check_unicode(self): # type: () -> None warnings.warn('Config.check_unicode() is deprecated. Use check_unicode() instead.', RemovedInSphinx30Warning) check_unicode(self) def convert_overrides(self, name, value): # type: (unicode, Any) -> Any if not isinstance(value, string_types): return value else: defvalue = self.values[name][0] if self.values[name][2] == Any: return value elif isinstance(defvalue, dict): raise ValueError(__('cannot override dictionary config setting %r, ' 'ignoring (use %r to set individual elements)') % (name, name + '.key=value')) elif isinstance(defvalue, list): return value.split(',') elif isinstance(defvalue, integer_types): try: return int(value) except ValueError: raise ValueError(__('invalid number %r for config value %r, ignoring') % (value, name)) elif hasattr(defvalue, '__call__'): return value elif defvalue is not None and not isinstance(defvalue, string_types): raise ValueError(__('cannot override config setting %r with unsupported ' 'type, ignoring') % name) else: return value def pre_init_values(self): # type: () -> None """ Initialize some limited config variables before initialize i18n and loading extensions """ variables = ['needs_sphinx', 'suppress_warnings', 'language', 'locale_dirs'] for name in variables: try: if name in self.overrides: self.__dict__[name] = self.convert_overrides(name, self.overrides[name]) elif name in self._raw_config: self.__dict__[name] = self._raw_config[name] except ValueError as exc: logger.warning("%s", exc) def init_values(self): # type: () -> None config = self._raw_config for valname, value in iteritems(self.overrides): try: if '.' in valname: realvalname, key = valname.split('.', 1) config.setdefault(realvalname, {})[key] = value continue elif valname not in self.values: logger.warning(__('unknown config value %r in override, ignoring'), valname) continue if isinstance(value, string_types): config[valname] = self.convert_overrides(valname, value) else: config[valname] = value except ValueError as exc: logger.warning("%s", exc) for name in config: if name in self.values: self.__dict__[name] = config[name] # type: ignore def __getattr__(self, name): # type: (unicode) -> Any if name.startswith('_'): raise AttributeError(name) if name not in self.values: raise AttributeError(__('No such config value: %s') % name) default = self.values[name][0] if hasattr(default, '__call__'): return default(self) return default def __getitem__(self, name): # type: (unicode) -> unicode return getattr(self, name) def __setitem__(self, name, value): # type: (unicode, Any) -> None setattr(self, name, value) def __delitem__(self, name): # type: (unicode) -> None delattr(self, name) def __contains__(self, name): # type: (unicode) -> bool return name in self.values def __iter__(self): # type: () -> Generator[ConfigValue, None, None] for name, value in iteritems(self.values): yield ConfigValue(name, getattr(self, name), value[1]) # type: ignore def add(self, name, default, rebuild, types): # type: (unicode, Any, Union[bool, unicode], Any) -> None if name in self.values: raise ExtensionError(__('Config value %r already present') % name) else: self.values[name] = (default, rebuild, types) def filter(self, rebuild): # type: (Union[unicode, List[unicode]]) -> Iterator[ConfigValue] if isinstance(rebuild, string_types): rebuild = [rebuild] return (value for value in self if value.rebuild in rebuild) def __getstate__(self): # type: () -> Dict """Obtains serializable data for pickling.""" # remove potentially pickling-problematic values from config __dict__ = {} for key, value in iteritems(self.__dict__): if key.startswith('_') or isinstance(value, UNSERIALIZEABLE_TYPES): pass else: __dict__[key] = value # create a picklable copy of values list __dict__['values'] = {} for key, value in iteritems(self.values): # type: ignore real_value = getattr(self, key) if isinstance(real_value, UNSERIALIZEABLE_TYPES): # omit unserializable value real_value = None # types column is also omitted __dict__['values'][key] = (real_value, value[1], None) return __dict__ def __setstate__(self, state): # type: (Dict) -> None self.__dict__.update(state)
def eval_config_file(filename, tags): # type: (unicode, Tags) -> Dict[unicode, Any] """Evaluate a config file.""" namespace = {} # type: Dict[unicode, Any] namespace['__file__'] = filename namespace['tags'] = tags with cd(path.dirname(filename)): # during executing config file, current dir is changed to ``confdir``. try: execfile_(filename, namespace) except SyntaxError as err: msg = __("There is a syntax error in your configuration file: %s") if PY3: msg += __("\nDid you change the syntax from 2.x to 3.x?") raise ConfigError(msg % err) except SystemExit: msg = __("The configuration file (or one of the modules it imports) " "called sys.exit()") raise ConfigError(msg) except Exception: msg = __("There is a programmable error in your configuration file:\n\n%s") raise ConfigError(msg % traceback.format_exc()) return namespace def convert_source_suffix(app, config): # type: (Sphinx, Config) -> None """This converts old styled source_suffix to new styled one. * old style: str or list * new style: a dict which maps from fileext to filetype """ source_suffix = config.source_suffix if isinstance(source_suffix, string_types): # if str, considers as default filetype (None) # # The default filetype is determined on later step. # By default, it is considered as restructuredtext. config.source_suffix = OrderedDict({source_suffix: None}) # type: ignore elif isinstance(source_suffix, (list, tuple)): # if list, considers as all of them are default filetype config.source_suffix = OrderedDict([(s, None) for s in source_suffix]) # type: ignore # NOQA elif isinstance(source_suffix, dict): # if dict, convert it to OrderedDict config.source_suffix = OrderedDict(config.source_suffix) # type: ignore else: logger.warning(__("The config value `source_suffix' expected to " "a string, list of strings or dictionary. " "But `%r' is given." % source_suffix)) def init_numfig_format(app, config): # type: (Sphinx, Config) -> None """Initialize :confval:`numfig_format`.""" numfig_format = {'section': _('Section %s'), 'figure': _('Fig. %s'), 'table': _('Table %s'), 'code-block': _('Listing %s')} # override default labels by configuration numfig_format.update(config.numfig_format) config.numfig_format = numfig_format # type: ignore def correct_copyright_year(app, config): # type: (Sphinx, Config) -> None """correct values of copyright year that are not coherent with the SOURCE_DATE_EPOCH environment variable (if set) See https://reproducible-builds.org/specs/source-date-epoch/ """ if getenv('SOURCE_DATE_EPOCH') is not None: for k in ('copyright', 'epub_copyright'): if k in config: replace = r'\g<1>%s' % format_date('%Y') config[k] = copyright_year_re.sub(replace, config[k]) # type: ignore def check_confval_types(app, config): # type: (Sphinx, Config) -> None """check all values for deviation from the default value's type, since that can result in TypeErrors all over the place NB. """ for confval in config: default, rebuild, annotations = config.values[confval.name] if hasattr(default, '__call__'): default = default(config) # evaluate default value if default is None and not annotations: continue # neither inferrable nor expliclitly annotated types if annotations is Any: # any type of value is accepted pass elif isinstance(annotations, ENUM): if not annotations.match(confval.value): msg = __("The config value `{name}` has to be a one of {candidates}, " "but `{current}` is given.") logger.warning(msg.format(name=confval.name, current=confval.value, candidates=annotations.candidates)) else: if type(confval.value) is type(default): continue if type(confval.value) in annotations: continue common_bases = (set(type(confval.value).__bases__ + (type(confval.value),)) & set(type(default).__bases__)) common_bases.discard(object) if common_bases: continue # at least we share a non-trivial base class if annotations: msg = __("The config value `{name}' has type `{current.__name__}', " "expected to {permitted}.") logger.warning(msg.format(name=confval.name, current=type(confval.value), permitted=str([c.__name__ for c in annotations]))) else: msg = __("The config value `{name}' has type `{current.__name__}', " "defaults to `{default.__name__}'.") logger.warning(msg.format(name=confval.name, current=type(confval.value), default=type(default))) def check_unicode(config): # type: (Config) -> None """check all string values for non-ASCII characters in bytestrings, since that can result in UnicodeErrors all over the place """ nonascii_re = re.compile(br'[\x80-\xff]') for name, value in iteritems(config._raw_config): if isinstance(value, binary_type) and nonascii_re.search(value): logger.warning(__('the config value %r is set to a string with non-ASCII ' 'characters; this can lead to Unicode errors occurring. ' 'Please use Unicode strings, e.g. %r.'), name, u'Content') def setup(app): # type: (Sphinx) -> Dict[unicode, Any] app.connect('config-inited', convert_source_suffix) app.connect('config-inited', init_numfig_format) app.connect('config-inited', correct_copyright_year) app.connect('config-inited', check_confval_types) return { 'version': 'builtin', 'parallel_read_safe': True, 'parallel_write_safe': True, }