/usr/lib/python3/dist-packages/docutils/frontend.py is in python3-docutils 0.11-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 | # $Id: frontend.py 7584 2013-01-01 20:00:21Z milde $
# Author: David Goodger <goodger@python.org>
# Copyright: This module has been placed in the public domain.
"""
Command-line and common processing for Docutils front-end tools.
Exports the following classes:
* `OptionParser`: Standard Docutils command-line processing.
* `Option`: Customized version of `optparse.Option`; validation support.
* `Values`: Runtime settings; objects are simple structs
(``object.attribute``). Supports cumulative list settings (attributes).
* `ConfigParser`: Standard Docutils config file processing.
Also exports the following functions:
* Option callbacks: `store_multiple`, `read_config_file`.
* Setting validators: `validate_encoding`,
`validate_encoding_error_handler`,
`validate_encoding_and_error_handler`,
`validate_boolean`, `validate_ternary`, `validate_threshold`,
`validate_colon_separated_string_list`,
`validate_comma_separated_string_list`,
`validate_dependency_file`.
* `make_paths_absolute`.
* SettingSpec manipulation: `filter_settings_spec`.
"""
__docformat__ = 'reStructuredText'
import os
import os.path
import sys
import warnings
import configparser as CP
import codecs
import optparse
from optparse import SUPPRESS_HELP
import docutils
import docutils.utils
import docutils.nodes
from docutils.utils.error_reporting import locale_encoding, ErrorOutput, ErrorString
def store_multiple(option, opt, value, parser, *args, **kwargs):
"""
Store multiple values in `parser.values`. (Option callback.)
Store `None` for each attribute named in `args`, and store the value for
each key (attribute name) in `kwargs`.
"""
for attribute in args:
setattr(parser.values, attribute, None)
for key, value in list(kwargs.items()):
setattr(parser.values, key, value)
def read_config_file(option, opt, value, parser):
"""
Read a configuration file during option processing. (Option callback.)
"""
try:
new_settings = parser.get_config_file_settings(value)
except ValueError as error:
parser.error(error)
parser.values.update(new_settings, parser)
def validate_encoding(setting, value, option_parser,
config_parser=None, config_section=None):
try:
codecs.lookup(value)
except LookupError:
raise LookupError('setting "%s": unknown encoding: "%s"'
% (setting, value))
return value
def validate_encoding_error_handler(setting, value, option_parser,
config_parser=None, config_section=None):
try:
codecs.lookup_error(value)
except LookupError:
raise LookupError(
'unknown encoding error handler: "%s" (choices: '
'"strict", "ignore", "replace", "backslashreplace", '
'"xmlcharrefreplace", and possibly others; see documentation for '
'the Python ``codecs`` module)' % value)
return value
def validate_encoding_and_error_handler(
setting, value, option_parser, config_parser=None, config_section=None):
"""
Side-effect: if an error handler is included in the value, it is inserted
into the appropriate place as if it was a separate setting/option.
"""
if ':' in value:
encoding, handler = value.split(':')
validate_encoding_error_handler(
setting + '_error_handler', handler, option_parser,
config_parser, config_section)
if config_parser:
config_parser.set(config_section, setting + '_error_handler',
handler)
else:
setattr(option_parser.values, setting + '_error_handler', handler)
else:
encoding = value
validate_encoding(setting, encoding, option_parser,
config_parser, config_section)
return encoding
def validate_boolean(setting, value, option_parser,
config_parser=None, config_section=None):
"""Check/normalize boolean settings:
True: '1', 'on', 'yes', 'true'
False: '0', 'off', 'no','false', ''
"""
if isinstance(value, bool):
return value
try:
return option_parser.booleans[value.strip().lower()]
except KeyError:
raise LookupError('unknown boolean value: "%s"' % value)
def validate_ternary(setting, value, option_parser,
config_parser=None, config_section=None):
"""Check/normalize three-value settings:
True: '1', 'on', 'yes', 'true'
False: '0', 'off', 'no','false', ''
any other value: returned as-is.
"""
if isinstance(value, bool) or value is None:
return value
try:
return option_parser.booleans[value.strip().lower()]
except KeyError:
return value
def validate_nonnegative_int(setting, value, option_parser,
config_parser=None, config_section=None):
value = int(value)
if value < 0:
raise ValueError('negative value; must be positive or zero')
return value
def validate_threshold(setting, value, option_parser,
config_parser=None, config_section=None):
try:
return int(value)
except ValueError:
try:
return option_parser.thresholds[value.lower()]
except (KeyError, AttributeError):
raise LookupError('unknown threshold: %r.' % value)
def validate_colon_separated_string_list(
setting, value, option_parser, config_parser=None, config_section=None):
if not isinstance(value, list):
value = value.split(':')
else:
last = value.pop()
value.extend(last.split(':'))
return value
def validate_comma_separated_list(setting, value, option_parser,
config_parser=None, config_section=None):
"""Check/normalize list arguments (split at "," and strip whitespace).
"""
# `value` is already a ``list`` when given as command line option
# and "action" is "append" and ``unicode`` or ``str`` else.
if not isinstance(value, list):
value = [value]
# this function is called for every option added to `value`
# -> split the last item and append the result:
last = value.pop()
items = [i.strip(' \t\n') for i in last.split(',') if i.strip(' \t\n')]
value.extend(items)
return value
def validate_url_trailing_slash(
setting, value, option_parser, config_parser=None, config_section=None):
if not value:
return './'
elif value.endswith('/'):
return value
else:
return value + '/'
def validate_dependency_file(setting, value, option_parser,
config_parser=None, config_section=None):
try:
return docutils.utils.DependencyList(value)
except IOError:
return docutils.utils.DependencyList(None)
def validate_strip_class(setting, value, option_parser,
config_parser=None, config_section=None):
# value is a comma separated string list:
value = validate_comma_separated_list(setting, value, option_parser,
config_parser, config_section)
# validate list elements:
for cls in value:
normalized = docutils.nodes.make_id(cls)
if cls != normalized:
raise ValueError('invalid class value %r (perhaps %r?)'
% (cls, normalized))
return value
def make_paths_absolute(pathdict, keys, base_path=None):
"""
Interpret filesystem path settings relative to the `base_path` given.
Paths are values in `pathdict` whose keys are in `keys`. Get `keys` from
`OptionParser.relative_path_settings`.
"""
if base_path is None:
base_path = os.getcwd() # type(base_path) == unicode
# to allow combining non-ASCII cwd with unicode values in `pathdict`
for key in keys:
if key in pathdict:
value = pathdict[key]
if isinstance(value, list):
value = [make_one_path_absolute(base_path, path)
for path in value]
elif value:
value = make_one_path_absolute(base_path, value)
pathdict[key] = value
def make_one_path_absolute(base_path, path):
return os.path.abspath(os.path.join(base_path, path))
def filter_settings_spec(settings_spec, *exclude, **replace):
"""Return a copy of `settings_spec` excluding/replacing some settings.
`settings_spec` is a tuple of configuration settings with a structure
described for docutils.SettingsSpec.settings_spec.
Optional positional arguments are names of to-be-excluded settings.
Keyword arguments are option specification replacements.
(See the html4strict writer for an example.)
"""
settings = list(settings_spec)
# every third item is a sequence of option tuples
for i in range(2, len(settings), 3):
newopts = []
for opt_spec in settings[i]:
# opt_spec is ("<help>", [<option strings>], {<keyword args>})
opt_name = [opt_string[2:].replace('-', '_')
for opt_string in opt_spec[1]
if opt_string.startswith('--')
][0]
if opt_name in exclude:
continue
if opt_name in list(replace.keys()):
newopts.append(replace[opt_name])
else:
newopts.append(opt_spec)
settings[i] = tuple(newopts)
return tuple(settings)
class Values(optparse.Values):
"""
Updates list attributes by extension rather than by replacement.
Works in conjunction with the `OptionParser.lists` instance attribute.
"""
def __init__(self, *args, **kwargs):
optparse.Values.__init__(self, *args, **kwargs)
if (not hasattr(self, 'record_dependencies')
or self.record_dependencies is None):
# Set up dependency list, in case it is needed.
self.record_dependencies = docutils.utils.DependencyList()
def update(self, other_dict, option_parser):
if isinstance(other_dict, Values):
other_dict = other_dict.__dict__
other_dict = other_dict.copy()
for setting in list(option_parser.lists.keys()):
if (hasattr(self, setting) and setting in other_dict):
value = getattr(self, setting)
if value:
value += other_dict[setting]
del other_dict[setting]
self._update_loose(other_dict)
def copy(self):
"""Return a shallow copy of `self`."""
return self.__class__(defaults=self.__dict__)
class Option(optparse.Option):
ATTRS = optparse.Option.ATTRS + ['validator', 'overrides']
def process(self, opt, value, values, parser):
"""
Call the validator function on applicable settings and
evaluate the 'overrides' option.
Extends `optparse.Option.process`.
"""
result = optparse.Option.process(self, opt, value, values, parser)
setting = self.dest
if setting:
if self.validator:
value = getattr(values, setting)
try:
new_value = self.validator(setting, value, parser)
except Exception as error:
raise optparse.OptionValueError(
'Error in option "%s":\n %s'
% (opt, ErrorString(error)))
setattr(values, setting, new_value)
if self.overrides:
setattr(values, self.overrides, None)
return result
class OptionParser(optparse.OptionParser, docutils.SettingsSpec):
"""
Parser for command-line and library use. The `settings_spec`
specification here and in other Docutils components are merged to build
the set of command-line options and runtime settings for this process.
Common settings (defined below) and component-specific settings must not
conflict. Short options are reserved for common settings, and components
are restrict to using long options.
"""
standard_config_files = [
'/etc/docutils.conf', # system-wide
'./docutils.conf', # project-specific
'~/.docutils'] # user-specific
"""Docutils configuration files, using ConfigParser syntax. Filenames
will be tilde-expanded later. Later files override earlier ones."""
threshold_choices = 'info 1 warning 2 error 3 severe 4 none 5'.split()
"""Possible inputs for for --report and --halt threshold values."""
thresholds = {'info': 1, 'warning': 2, 'error': 3, 'severe': 4, 'none': 5}
"""Lookup table for --report and --halt threshold values."""
booleans={'1': True, 'on': True, 'yes': True, 'true': True,
'0': False, 'off': False, 'no': False, 'false': False, '': False}
"""Lookup table for boolean configuration file settings."""
default_error_encoding = getattr(sys.stderr, 'encoding',
None) or locale_encoding or 'ascii'
default_error_encoding_error_handler = 'backslashreplace'
settings_spec = (
'General Docutils Options',
None,
(('Specify the document title as metadata.',
['--title'], {}),
('Include a "Generated by Docutils" credit and link.',
['--generator', '-g'], {'action': 'store_true',
'validator': validate_boolean}),
('Do not include a generator credit.',
['--no-generator'], {'action': 'store_false', 'dest': 'generator'}),
('Include the date at the end of the document (UTC).',
['--date', '-d'], {'action': 'store_const', 'const': '%Y-%m-%d',
'dest': 'datestamp'}),
('Include the time & date (UTC).',
['--time', '-t'], {'action': 'store_const',
'const': '%Y-%m-%d %H:%M UTC',
'dest': 'datestamp'}),
('Do not include a datestamp of any kind.',
['--no-datestamp'], {'action': 'store_const', 'const': None,
'dest': 'datestamp'}),
('Include a "View document source" link.',
['--source-link', '-s'], {'action': 'store_true',
'validator': validate_boolean}),
('Use <URL> for a source link; implies --source-link.',
['--source-url'], {'metavar': '<URL>'}),
('Do not include a "View document source" link.',
['--no-source-link'],
{'action': 'callback', 'callback': store_multiple,
'callback_args': ('source_link', 'source_url')}),
('Link from section headers to TOC entries. (default)',
['--toc-entry-backlinks'],
{'dest': 'toc_backlinks', 'action': 'store_const', 'const': 'entry',
'default': 'entry'}),
('Link from section headers to the top of the TOC.',
['--toc-top-backlinks'],
{'dest': 'toc_backlinks', 'action': 'store_const', 'const': 'top'}),
('Disable backlinks to the table of contents.',
['--no-toc-backlinks'],
{'dest': 'toc_backlinks', 'action': 'store_false'}),
('Link from footnotes/citations to references. (default)',
['--footnote-backlinks'],
{'action': 'store_true', 'default': 1,
'validator': validate_boolean}),
('Disable backlinks from footnotes and citations.',
['--no-footnote-backlinks'],
{'dest': 'footnote_backlinks', 'action': 'store_false'}),
('Enable section numbering by Docutils. (default)',
['--section-numbering'],
{'action': 'store_true', 'dest': 'sectnum_xform',
'default': 1, 'validator': validate_boolean}),
('Disable section numbering by Docutils.',
['--no-section-numbering'],
{'action': 'store_false', 'dest': 'sectnum_xform'}),
('Remove comment elements from the document tree.',
['--strip-comments'],
{'action': 'store_true', 'validator': validate_boolean}),
('Leave comment elements in the document tree. (default)',
['--leave-comments'],
{'action': 'store_false', 'dest': 'strip_comments'}),
('Remove all elements with classes="<class>" from the document tree. '
'Warning: potentially dangerous; use with caution. '
'(Multiple-use option.)',
['--strip-elements-with-class'],
{'action': 'append', 'dest': 'strip_elements_with_classes',
'metavar': '<class>', 'validator': validate_strip_class}),
('Remove all classes="<class>" attributes from elements in the '
'document tree. Warning: potentially dangerous; use with caution. '
'(Multiple-use option.)',
['--strip-class'],
{'action': 'append', 'dest': 'strip_classes',
'metavar': '<class>', 'validator': validate_strip_class}),
('Report system messages at or higher than <level>: "info" or "1", '
'"warning"/"2" (default), "error"/"3", "severe"/"4", "none"/"5"',
['--report', '-r'], {'choices': threshold_choices, 'default': 2,
'dest': 'report_level', 'metavar': '<level>',
'validator': validate_threshold}),
('Report all system messages. (Same as "--report=1".)',
['--verbose', '-v'], {'action': 'store_const', 'const': 1,
'dest': 'report_level'}),
('Report no system messages. (Same as "--report=5".)',
['--quiet', '-q'], {'action': 'store_const', 'const': 5,
'dest': 'report_level'}),
('Halt execution at system messages at or above <level>. '
'Levels as in --report. Default: 4 (severe).',
['--halt'], {'choices': threshold_choices, 'dest': 'halt_level',
'default': 4, 'metavar': '<level>',
'validator': validate_threshold}),
('Halt at the slightest problem. Same as "--halt=info".',
['--strict'], {'action': 'store_const', 'const': 1,
'dest': 'halt_level'}),
('Enable a non-zero exit status for non-halting system messages at '
'or above <level>. Default: 5 (disabled).',
['--exit-status'], {'choices': threshold_choices,
'dest': 'exit_status_level',
'default': 5, 'metavar': '<level>',
'validator': validate_threshold}),
('Enable debug-level system messages and diagnostics.',
['--debug'], {'action': 'store_true', 'validator': validate_boolean}),
('Disable debug output. (default)',
['--no-debug'], {'action': 'store_false', 'dest': 'debug'}),
('Send the output of system messages to <file>.',
['--warnings'], {'dest': 'warning_stream', 'metavar': '<file>'}),
('Enable Python tracebacks when Docutils is halted.',
['--traceback'], {'action': 'store_true', 'default': None,
'validator': validate_boolean}),
('Disable Python tracebacks. (default)',
['--no-traceback'], {'dest': 'traceback', 'action': 'store_false'}),
('Specify the encoding and optionally the '
'error handler of input text. Default: <locale-dependent>:strict.',
['--input-encoding', '-i'],
{'metavar': '<name[:handler]>',
'validator': validate_encoding_and_error_handler}),
('Specify the error handler for undecodable characters. '
'Choices: "strict" (default), "ignore", and "replace".',
['--input-encoding-error-handler'],
{'default': 'strict', 'validator': validate_encoding_error_handler}),
('Specify the text encoding and optionally the error handler for '
'output. Default: UTF-8:strict.',
['--output-encoding', '-o'],
{'metavar': '<name[:handler]>', 'default': 'utf-8',
'validator': validate_encoding_and_error_handler}),
('Specify error handler for unencodable output characters; '
'"strict" (default), "ignore", "replace", '
'"xmlcharrefreplace", "backslashreplace".',
['--output-encoding-error-handler'],
{'default': 'strict', 'validator': validate_encoding_error_handler}),
('Specify text encoding and error handler for error output. '
'Default: %s:%s.'
% (default_error_encoding, default_error_encoding_error_handler),
['--error-encoding', '-e'],
{'metavar': '<name[:handler]>', 'default': default_error_encoding,
'validator': validate_encoding_and_error_handler}),
('Specify the error handler for unencodable characters in '
'error output. Default: %s.'
% default_error_encoding_error_handler,
['--error-encoding-error-handler'],
{'default': default_error_encoding_error_handler,
'validator': validate_encoding_error_handler}),
('Specify the language (as BCP 47 language tag). Default: en.',
['--language', '-l'], {'dest': 'language_code', 'default': 'en',
'metavar': '<name>'}),
('Write output file dependencies to <file>.',
['--record-dependencies'],
{'metavar': '<file>', 'validator': validate_dependency_file,
'default': None}), # default set in Values class
('Read configuration settings from <file>, if it exists.',
['--config'], {'metavar': '<file>', 'type': 'string',
'action': 'callback', 'callback': read_config_file}),
("Show this program's version number and exit.",
['--version', '-V'], {'action': 'version'}),
('Show this help message and exit.',
['--help', '-h'], {'action': 'help'}),
# Typically not useful for non-programmatical use:
(SUPPRESS_HELP, ['--id-prefix'], {'default': ''}),
(SUPPRESS_HELP, ['--auto-id-prefix'], {'default': 'id'}),
# Hidden options, for development use only:
(SUPPRESS_HELP, ['--dump-settings'], {'action': 'store_true'}),
(SUPPRESS_HELP, ['--dump-internals'], {'action': 'store_true'}),
(SUPPRESS_HELP, ['--dump-transforms'], {'action': 'store_true'}),
(SUPPRESS_HELP, ['--dump-pseudo-xml'], {'action': 'store_true'}),
(SUPPRESS_HELP, ['--expose-internal-attribute'],
{'action': 'append', 'dest': 'expose_internals',
'validator': validate_colon_separated_string_list}),
(SUPPRESS_HELP, ['--strict-visitor'], {'action': 'store_true'}),
))
"""Runtime settings and command-line options common to all Docutils front
ends. Setting specs specific to individual Docutils components are also
used (see `populate_from_components()`)."""
settings_defaults = {'_disable_config': None,
'_source': None,
'_destination': None,
'_config_files': None}
"""Defaults for settings that don't have command-line option equivalents."""
relative_path_settings = ('warning_stream',)
config_section = 'general'
version_template = ('%%prog (Docutils %s [%s], Python %s, on %s)'
% (docutils.__version__, docutils.__version_details__,
sys.version.split()[0], sys.platform))
"""Default version message."""
def __init__(self, components=(), defaults=None, read_config_files=None,
*args, **kwargs):
"""
`components` is a list of Docutils components each containing a
``.settings_spec`` attribute. `defaults` is a mapping of setting
default overrides.
"""
self.lists = {}
"""Set of list-type settings."""
self.config_files = []
"""List of paths of applied configuration files."""
optparse.OptionParser.__init__(
self, option_class=Option, add_help_option=None,
formatter=optparse.TitledHelpFormatter(width=78),
*args, **kwargs)
if not self.version:
self.version = self.version_template
# Make an instance copy (it will be modified):
self.relative_path_settings = list(self.relative_path_settings)
self.components = (self,) + tuple(components)
self.populate_from_components(self.components)
self.set_defaults_from_dict(defaults or {})
if read_config_files and not self.defaults['_disable_config']:
try:
config_settings = self.get_standard_config_settings()
except ValueError as error:
self.error(error)
self.set_defaults_from_dict(config_settings.__dict__)
def populate_from_components(self, components):
"""
For each component, first populate from the `SettingsSpec.settings_spec`
structure, then from the `SettingsSpec.settings_defaults` dictionary.
After all components have been processed, check for and populate from
each component's `SettingsSpec.settings_default_overrides` dictionary.
"""
for component in components:
if component is None:
continue
settings_spec = component.settings_spec
self.relative_path_settings.extend(
component.relative_path_settings)
for i in range(0, len(settings_spec), 3):
title, description, option_spec = settings_spec[i:i+3]
if title:
group = optparse.OptionGroup(self, title, description)
self.add_option_group(group)
else:
group = self # single options
for (help_text, option_strings, kwargs) in option_spec:
option = group.add_option(help=help_text, *option_strings,
**kwargs)
if kwargs.get('action') == 'append':
self.lists[option.dest] = 1
if component.settings_defaults:
self.defaults.update(component.settings_defaults)
for component in components:
if component and component.settings_default_overrides:
self.defaults.update(component.settings_default_overrides)
def get_standard_config_files(self):
"""Return list of config files, from environment or standard."""
try:
config_files = os.environ['DOCUTILSCONFIG'].split(os.pathsep)
except KeyError:
config_files = self.standard_config_files
# If 'HOME' is not set, expandvars() requires the 'pwd' module which is
# not available under certain environments, for example, within
# mod_python. The publisher ends up in here, and we need to publish
# from within mod_python. Therefore we need to avoid expanding when we
# are in those environments.
expand = os.path.expanduser
if 'HOME' not in os.environ:
try:
import pwd
except ImportError:
expand = lambda x: x
return [expand(f) for f in config_files if f.strip()]
def get_standard_config_settings(self):
settings = Values()
for filename in self.get_standard_config_files():
settings.update(self.get_config_file_settings(filename), self)
return settings
def get_config_file_settings(self, config_file):
"""Returns a dictionary containing appropriate config file settings."""
parser = ConfigParser()
parser.read(config_file, self)
self.config_files.extend(parser._files)
base_path = os.path.dirname(config_file)
applied = {}
settings = Values()
for component in self.components:
if not component:
continue
for section in (tuple(component.config_section_dependencies or ())
+ (component.config_section,)):
if section in applied:
continue
applied[section] = 1
settings.update(parser.get_section(section), self)
make_paths_absolute(
settings.__dict__, self.relative_path_settings, base_path)
return settings.__dict__
def check_values(self, values, args):
"""Store positional arguments as runtime settings."""
values._source, values._destination = self.check_args(args)
make_paths_absolute(values.__dict__, self.relative_path_settings)
values._config_files = self.config_files
return values
def check_args(self, args):
source = destination = None
if args:
source = args.pop(0)
if source == '-': # means stdin
source = None
if args:
destination = args.pop(0)
if destination == '-': # means stdout
destination = None
if args:
self.error('Maximum 2 arguments allowed.')
if source and source == destination:
self.error('Do not specify the same file for both source and '
'destination. It will clobber the source file.')
return source, destination
def set_defaults_from_dict(self, defaults):
self.defaults.update(defaults)
def get_default_values(self):
"""Needed to get custom `Values` instances."""
defaults = Values(self.defaults)
defaults._config_files = self.config_files
return defaults
def get_option_by_dest(self, dest):
"""
Get an option by its dest.
If you're supplying a dest which is shared by several options,
it is undefined which option of those is returned.
A KeyError is raised if there is no option with the supplied
dest.
"""
for group in self.option_groups + [self]:
for option in group.option_list:
if option.dest == dest:
return option
raise KeyError('No option with dest == %r.' % dest)
class ConfigParser(CP.RawConfigParser):
old_settings = {
'pep_stylesheet': ('pep_html writer', 'stylesheet'),
'pep_stylesheet_path': ('pep_html writer', 'stylesheet_path'),
'pep_template': ('pep_html writer', 'template')}
"""{old setting: (new section, new setting)} mapping, used by
`handle_old_config`, to convert settings from the old [options] section."""
old_warning = """
The "[option]" section is deprecated. Support for old-format configuration
files may be removed in a future Docutils release. Please revise your
configuration files. See <http://docutils.sf.net/docs/user/config.html>,
section "Old-Format Configuration Files".
"""
not_utf8_error = """\
Unable to read configuration file "%s": content not encoded as UTF-8.
Skipping "%s" configuration file.
"""
def __init__(self, *args, **kwargs):
CP.RawConfigParser.__init__(self, *args, **kwargs)
self._files = []
"""List of paths of configuration files read."""
self._stderr = ErrorOutput()
"""Wrapper around sys.stderr catching en-/decoding errors"""
def read(self, filenames, option_parser):
if type(filenames) in (str, str):
filenames = [filenames]
for filename in filenames:
try:
# Config files must be UTF-8-encoded:
fp = codecs.open(filename, 'r', 'utf-8')
except IOError:
continue
try:
if sys.version_info < (3,2):
CP.RawConfigParser.readfp(self, fp, filename)
else:
CP.RawConfigParser.read_file(self, fp, filename)
except UnicodeDecodeError:
self._stderr.write(self.not_utf8_error % (filename, filename))
fp.close()
continue
fp.close()
self._files.append(filename)
if self.has_section('options'):
self.handle_old_config(filename)
self.validate_settings(filename, option_parser)
def handle_old_config(self, filename):
warnings.warn_explicit(self.old_warning, ConfigDeprecationWarning,
filename, 0)
options = self.get_section('options')
if not self.has_section('general'):
self.add_section('general')
for key, value in list(options.items()):
if key in self.old_settings:
section, setting = self.old_settings[key]
if not self.has_section(section):
self.add_section(section)
else:
section = 'general'
setting = key
if not self.has_option(section, setting):
self.set(section, setting, value)
self.remove_section('options')
def validate_settings(self, filename, option_parser):
"""
Call the validator function and implement overrides on all applicable
settings.
"""
for section in self.sections():
for setting in self.options(section):
try:
option = option_parser.get_option_by_dest(setting)
except KeyError:
continue
if option.validator:
value = self.get(section, setting)
try:
new_value = option.validator(
setting, value, option_parser,
config_parser=self, config_section=section)
except Exception as error:
raise ValueError(
'Error in config file "%s", section "[%s]":\n'
' %s\n'
' %s = %s'
% (filename, section, ErrorString(error),
setting, value))
self.set(section, setting, new_value)
if option.overrides:
self.set(section, option.overrides, None)
def optionxform(self, optionstr):
"""
Transform '-' to '_' so the cmdline form of option names can be used.
"""
return optionstr.lower().replace('-', '_')
def get_section(self, section):
"""
Return a given section as a dictionary (empty if the section
doesn't exist).
"""
section_dict = {}
if self.has_section(section):
for option in self.options(section):
section_dict[option] = self.get(section, option)
return section_dict
class ConfigDeprecationWarning(DeprecationWarning):
"""Warning for deprecated configuration file features."""
|