This file is indexed.

/usr/lib/python2.7/dist-packages/isodatetime/parsers.py is in python-cylc 7.6.0-1.

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
# -*- coding: utf-8 -*-
# ----------------------------------------------------------------------------
# (C) British Crown Copyright 2013-2017 Met Office.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
# ----------------------------------------------------------------------------

"""This provides ISO 8601 parsing functionality."""

import re
import sre_constants

from . import data
from . import dumpers
from . import parser_spec
from . import timezone


class ISO8601SyntaxError(ValueError):

    """An error denoting invalid input syntax."""

    BAD_TIME_INPUT = "Invalid ISO 8601 {0} representation: {1}"

    def __str__(self):
        return self.BAD_TIME_INPUT.format(*self.args)


class StrptimeConversionError(ValueError):

    """An error denoting bad conversion from a strftime/strptime format."""

    BAD_CONVERSION = "Bad conversion for strftime/strptime input {0}: {1}."

    def __str__(self):
        return self.BAD_CONVERSION.format(*self.args)


class TimeRecurrenceParser(object):

    """Parser for ISO 8601 recurrence expressions.

    Keyword arguments:
    timepoint_parser (default None) should be an instance of
    TimePointParser, or None to use a normal TimePointParser instance.
    duration_parser (default None) should be an instance of
    DurationParser, or None to generate a normal
    DurationParser.

    Callable (via self.parse method) with an ISO 8601-compliant
    recurrence pattern - this returns a TimeRecurrence instance.

    """

    RECURRENCE_REGEXES = [
        re.compile(r"^R(?P<reps>\d+)/(?P<start>[^P][^/]*)/(?P<end>[^P].*)$"),
        re.compile(r"^R(?P<reps>\d+)?/(?P<start>[^P][^/]*)/(?P<intv>P.+)$"),
        re.compile(r"^R(?P<reps>\d+)?/(?P<intv>P.+)/(?P<end>[^P].*)$")]

    def __init__(self, timepoint_parser=None, duration_parser=None):
        if timepoint_parser is None:
            self.timepoint_parser = TimePointParser()
        else:
            self.timepoint_parser = timepoint_parser
        if duration_parser is None:
            self.duration_parser = DurationParser()
        else:
            self.duration_parser = duration_parser

    def parse(self, expression):
        """Parse a recurrence string into a TimeRecurrence instance."""
        for regex in self.RECURRENCE_REGEXES:
            result = regex.search(expression)
            if not result:
                continue
            result_map = result.groupdict()
            repetitions = None
            start_point = None
            end_point = None
            duration = None
            if "reps" in result_map and result_map["reps"] is not None:
                repetitions = int(result_map["reps"])
            if "start" in result_map:
                start_point = self.timepoint_parser.parse(result_map["start"])
            if "end" in result_map:
                end_point = self.timepoint_parser.parse(result_map["end"])
            if "intv" in result_map:
                duration = self.duration_parser.parse(
                    result_map["intv"])
            return data.TimeRecurrence(
                repetitions=repetitions,
                start_point=start_point,
                end_point=end_point,
                duration=duration
            )
        raise ISO8601SyntaxError("recurrence", expression)

    __call__ = parse


class TimePointParser(object):

    """Container for ISO 8601 date/time expressions.

    Keyword arguments:
    num_expanded_year_digits (default 2) specifies the extra year
    digits allowed by the ISO standard - for example, 1995 can be
    written as +001995 with 2 extra year digits.

    allow_truncated (default False) specifies that ISO 8601:2000
    truncations are allowed (not allowed in the ISO 8601:2004
    standard which supersedes it).

    allow_only_basic (default False) specifies that only the basic
    forms of date and time in the ISO standard are allowed (no
    extraneous punctuation). This means that "2000-01-02T01:14:02"
    is not allowed, and must be written as "20000102T011402".

    assumed_time_zone (default None) is a tuple of hours (integer)
    and minutes (integer) that specifies that dates and times
    without time zone information should be set to have a time zone
    whose offset from UTC is the (hours, minutes) information in this
    variable. To assume UTC, set this to (0, 0).

    default_to_unknown_time_zone (default False) specifies that
    dates and times without time zone information (in the absence of
    assumed_time_zone) should be left with an unknown time zone
    setting. Otherwise, the current local time zone will be used.

    dump_format (default None) specifies a default custom dump format
    string for TimePoint instances. See data.TimePoint documentation
    for syntax.

    """

    def __init__(self, num_expanded_year_digits=2,
                 allow_truncated=False,
                 allow_only_basic=False,
                 assumed_time_zone=None,
                 default_to_unknown_time_zone=False,
                 dump_format=None):
        self.expanded_year_digits = num_expanded_year_digits
        self.allow_truncated = allow_truncated
        self.allow_only_basic = allow_only_basic
        self.assumed_time_zone = assumed_time_zone
        self.default_to_unknown_time_zone = default_to_unknown_time_zone
        self.dump_format = dump_format
        self._generate_regexes()

    def _generate_regexes(self):
        """Generate combined date time strings."""
        date_map = parser_spec.DATE_EXPRESSIONS
        time_map = parser_spec.TIME_EXPRESSIONS
        time_zone_map = parser_spec.TIME_ZONE_EXPRESSIONS
        self._date_regex_map = {}
        self._time_regex_map = {}
        self._time_zone_regex_map = {}
        format_ok_keys = ["basic", "extended"]
        if self.allow_only_basic:
            format_ok_keys = ["basic"]
        for format_type in format_ok_keys:
            self._date_regex_map.setdefault(format_type, {})
            self._time_regex_map.setdefault(format_type, {})
            self._time_zone_regex_map.setdefault(format_type, [])
            for date_key in date_map[format_type].keys():
                self._date_regex_map[format_type].setdefault(date_key, [])
                regex_list = self._date_regex_map[format_type][date_key]
                for date_expr in self.get_expressions(
                        date_map[format_type][date_key]):
                    date_regex = self.parse_date_expression_to_regex(
                        date_expr)
                    regex_list.append([re.compile(date_regex), date_expr])
            for time_key in time_map[format_type].keys():
                self._time_regex_map[format_type].setdefault(time_key, [])
                regex_list = self._time_regex_map[format_type][time_key]
                for time_expr in self.get_expressions(
                        time_map[format_type][time_key]):
                    time_regex = self.parse_time_expression_to_regex(
                        time_expr)
                    regex_list.append([re.compile(time_regex), time_expr])
            for time_zone_expr in self.get_expressions(
                    time_zone_map[format_type]):
                time_zone_regex = self.parse_time_zone_expression_to_regex(
                    time_zone_expr)
                self._time_zone_regex_map[format_type].append(
                    [re.compile(time_zone_regex), time_zone_expr])

    def get_expressions(self, text):
        """Yield valid expressions from text."""
        for line in text.splitlines():
            line_text = line.strip()
            if not line_text or line_text.startswith("#"):
                continue
            expr_text = line_text.split("#", 1)[0].strip()
            yield expr_text

    def parse_date_expression_to_regex(self, expression):
        """Construct regular expressions for the date."""
        for expr_regex, substitute, format_, name in (
                parser_spec.get_date_translate_info(
                    self.expanded_year_digits)):
            expression = re.sub(expr_regex, substitute, expression)
        expression = "^" + expression + "$"
        return expression

    def parse_time_expression_to_regex(self, expression):
        """Construct regular expressions for the time."""
        for expr_regex, substitute, format_, name in (
                parser_spec.get_time_translate_info()):
            expression = re.sub(expr_regex, substitute, expression)
        expression = "^" + expression + "$"
        return expression

    def parse_time_zone_expression_to_regex(self, expression):
        """Construct regular expressions for the time zone."""
        for expr_regex, substitute, format_, name in (
                parser_spec.get_time_zone_translate_info()):
            expression = re.sub(expr_regex, substitute, expression)
        expression = "^" + expression + "$"
        return expression

    def parse(self, timepoint_string, dump_format=None, dump_as_parsed=False):
        """Parse a user-supplied timepoint string."""
        date_info, time_info, parsed_expr = self.get_info(timepoint_string)
        if dump_as_parsed:
            dump_format = parsed_expr
        return self._create_timepoint_from_info(
            date_info, time_info, dump_format=dump_format,
            truncated_dump_format=dump_format)

    def _create_timepoint_from_info(self, date_info, time_info,
                                    dump_format=None,
                                    truncated_dump_format=None):
        info = {}
        truncated_property = None
        if date_info.get("truncated"):
            if "year_of_decade" in date_info:
                truncated_property = "year_of_decade"
            if "year_of_century" in date_info:
                truncated_property = "year_of_century"
        elif ("century" not in date_info and
              "year_of_century" in date_info):
            truncated_property = "year_of_century"
            date_info["truncated"] = True
        is_year_present = True
        if date_info.get("truncated"):
            is_year_present = False
            for property_ in ["year", "year_of_decade", "century",
                              "year_of_century", "expanded_year",
                              "year_sign"]:
                if date_info.get(property_) is not None:
                    is_year_present = True
        if is_year_present:
            year = int(date_info.get("year", 0))
            if "year_of_decade" in date_info:
                year += int(date_info.pop("year_of_decade"))
                truncated_property = "year_of_decade"
            year += int(date_info.pop("year_of_century", 0))
            year += 100 * int(date_info.pop("century", 0))
            expanded_year = date_info.pop("expanded_year", 0)
            if expanded_year:
                date_info["expanded_year_digits"] = self.expanded_year_digits
            year += 10000 * int(expanded_year)
            if date_info.pop("year_sign", "+") == "-":
                year *= -1
            date_info["year"] = year
        for key, value in date_info.items():
            try:
                date_info[key] = int(value)
            except (TypeError, ValueError):
                pass
        info.update(date_info)
        for key, value in time_info.items():
            if key.endswith("_decimal"):
                value = "0." + value
            try:
                value = float(value)
            except (IOError, TypeError, ValueError):
                pass
            if key == "time_zone_utc" and value == "Z":
                time_info.pop(key)
                time_info.update({"time_zone_hour": 0,
                                  "time_zone_minute": 0})
                continue
            time_info[key] = value
        info.update(time_info)
        if info.pop("truncated", False):
            info["truncated"] = True
        if truncated_property is not None:
            info["truncated_property"] = truncated_property
        if dump_format is None and self.dump_format:
            dump_format = self.dump_format
        if dump_format is not None:
            info.update({"dump_format": dump_format})
        if truncated_dump_format is not None:
            info.update({"truncated_dump_format": truncated_dump_format})
        return data.TimePoint(**info)

    def strptime(self, strptime_data_string, strptime_format_string,
                 dump_format=None):
        """Implement equivalent of Python 2's datetime.datetime.strptime.

        Return an isodatetime.data.TimePoint representing
        strptime_data_string based on the format given in
        strptime_format_string.
        dump_format is a custom dump format string (not in strftime
        format).

        """
        split_format = parser_spec.REC_SPLIT_STRFTIME_DIRECTIVE.split(
            strptime_format_string)
        regex = "^"
        for item in split_format:
            if parser_spec.REC_STRFTIME_DIRECTIVE_TOKEN.search(item):
                item_regex, item_properties = (
                    parser_spec.translate_strptime_token(item))
                regex += item_regex
            else:
                regex += re.escape(item)
        regex += "$"
        return self._parse_from_custom_regex(
            regex, strptime_data_string,
            dump_format=None, source=strptime_format_string)

    def _parse_from_custom_regex(self, regex, data_string, dump_format=None,
                                 source=None):
        """Parse data_string according to the regular expression in regex."""
        try:
            compiled_regex = re.compile(regex)
        except sre_constants.error:
            raise StrptimeConversionError(source, regex)
        result = compiled_regex.match(data_string)
        if not result:
            raise StrptimeConversionError(source, data_string)
        info = result.groupdict()
        for property_, value in info.items():
            if property_ in data.PARSE_PROPERTY_TRANSLATORS:
                info.pop(property_)
                translator = data.PARSE_PROPERTY_TRANSLATORS[property_]
                info.update(translator(value))
        date_info_keys = []
        for expr_regex, substitute, format_, name in (
                parser_spec.get_date_translate_info(
                    self.expanded_year_digits)):
            date_info_keys.append(name)
        time_info_keys = []
        for expr_regex, substitute, format_, name in (
                parser_spec.get_time_translate_info()):
            time_info_keys.append(name)
        date_info = {}
        time_info = {}
        time_zone_info = {}
        for key, value in info.items():
            if key in date_info_keys:
                date_info[key] = value
            elif key in time_info_keys:
                time_info[key] = value
            else:
                time_zone_info[key] = value
        time_zone_info = self.process_time_zone_info(time_zone_info)
        time_info.update(time_zone_info)
        return self._create_timepoint_from_info(
            date_info, time_info, dump_format=dump_format)

    def get_date_info(self, date_string, bad_types=None):
        """Return the format and properties from a date string."""
        type_keys = ["complete", "truncated", "reduced"]
        if bad_types is not None:
            for type_key in bad_types:
                type_keys.remove(type_key)
        if not self.allow_truncated and "truncated" in type_keys:
            type_keys.remove("truncated")
        for format_key, type_regex_map in self._date_regex_map.items():
            for type_key in type_keys:
                regex_list = type_regex_map[type_key]
                for regex, expr in regex_list:
                    result = regex.match(date_string)
                    if result:
                        return ((format_key, type_key, expr),
                                result.groupdict())
        raise ISO8601SyntaxError("date", date_string)

    def get_time_info(self, time_string, bad_formats=None, bad_types=None):
        """Return the properties from a time string."""
        if bad_formats is None:
            bad_formats = []
        if bad_types is None:
            bad_types = []
        for format_key, type_regex_map in self._time_regex_map.items():
            if format_key in bad_formats:
                continue
            for type_key, regex_list in type_regex_map.items():
                if type_key in bad_types:
                    continue
                for regex, expr in regex_list:
                    result = regex.match(time_string)
                    if result:
                        return expr, result.groupdict()
        raise ISO8601SyntaxError("time", time_string)

    def get_time_zone_info(self, time_zone_string, bad_formats=None):
        """Return the properties from a time zone string."""
        if bad_formats is None:
            bad_formats = []
        for format_key, regex_list in self._time_zone_regex_map.items():
            if format_key in bad_formats:
                continue
            for regex, expr in regex_list:
                result = regex.match(time_zone_string)
                if result:
                    return expr, result.groupdict()
        raise ISO8601SyntaxError("time zone", time_zone_string)

    def get_info(self, timepoint_string):
        """Return the date and time properties from a timepoint string."""
        date_time_time_zone = timepoint_string.split(
            parser_spec.TIME_DESIGNATOR)
        parsed_expr = ""
        if len(date_time_time_zone) == 1:
            date = date_time_time_zone[0]
            keys, date_info = self.get_date_info(date)
            format_key, type_key, date_expr = keys
            parsed_expr += date_expr
            time_info = {}
            time_zone_info = (
                self.process_time_zone_info({}))
            time_info.update(time_zone_info)
        else:
            date, time_time_zone = date_time_time_zone
            if not date and self.allow_truncated:
                keys = (None, "truncated", "")
                date_info = {"truncated": True}
            else:
                keys, date_info = self.get_date_info(date,
                                                     bad_types=["reduced"])
            format_key, type_key, date_expr = keys
            parsed_expr += date_expr
            bad_formats = []
            if format_key == "basic":
                bad_formats = ["extended"]
            if format_key == "extended":
                bad_formats = ["basic"]
            if type_key == "truncated":
                # Do not force basic/extended formatting for truncated dates.
                bad_formats = []
            bad_types = ["truncated"]
            if date_info.get("truncated"):
                bad_types = []
            if time_time_zone.endswith("Z"):
                time, time_zone = time_time_zone[:-1], "Z"
            elif "+" in time_time_zone:
                time, time_zone = time_time_zone.split("+")
                time_zone = "+" + time_zone
            elif "-" in time_time_zone:
                time, time_zone = time_time_zone.rsplit("-", 1)
                time_zone = "-" + time_zone
                # Make sure this isn't just a truncated time.
                try:
                    time_expr, time_info = self.get_time_info(
                        time,
                        bad_formats=bad_formats,
                        bad_types=bad_types
                    )
                    time_zone_expr, time_zone_info = self.get_time_zone_info(
                        time_zone,
                        bad_formats=bad_formats
                    )
                except ISO8601SyntaxError:
                    time = time_time_zone
                    time_zone = None
            else:
                time = time_time_zone
                time_zone = None
            if time_zone is None:
                time_zone_info = {}
                time_zone_expr = ""
                time_zone_info = (
                    self.process_time_zone_info(time_zone_info))
            else:
                time_zone_expr, time_zone_info = self.get_time_zone_info(
                    time_zone,
                    bad_formats=bad_formats
                )
                time_zone_info = self.process_time_zone_info(time_zone_info)
            time_expr, time_info = self.get_time_info(
                time, bad_formats=bad_formats, bad_types=bad_types)
            parsed_expr += parser_spec.TIME_DESIGNATOR + (
                time_expr + time_zone_expr)
            time_info.update(time_zone_info)
        return date_info, time_info, parsed_expr

    def process_time_zone_info(self, time_zone_info=None):
        """Rationalise time zone data and set defaults if appropriate."""
        if time_zone_info is None:
            time_zone_info = {}
        if not time_zone_info:
            # There is no time zone information specified.
            if self.assumed_time_zone is None:
                # No given value to assume.
                if self.default_to_unknown_time_zone:
                    # Return no time zone information.
                    return {}
                # Set the time zone to the current local time zone.
                utc_hour_offset, utc_minute_offset = (
                    timezone.get_local_time_zone())
                time_zone_info["time_zone_hour"] = utc_hour_offset
                time_zone_info["time_zone_minute"] = utc_minute_offset
                return time_zone_info
            else:
                # Set the time zone to a given value.
                utc_hour_offset, utc_minute_offset = self.assumed_time_zone
                time_zone_info["time_zone_hour"] = utc_hour_offset
                time_zone_info["time_zone_minute"] = utc_minute_offset
                return time_zone_info
        if time_zone_info.pop("time_zone_sign", "+") == "-":
            time_zone_info["time_zone_hour"] = (
                -int(time_zone_info["time_zone_hour"]))
            if "time_zone_minute" in time_zone_info:
                time_zone_info["time_zone_minute"] = (
                    -int(time_zone_info["time_zone_minute"]))
        return time_zone_info


class DurationParser(object):

    """Parser for ISO 8601 Durations (durations)."""

    DURATION_REGEXES = [
        re.compile(r"""^P(?:(?P<years>\d+)Y)?
                   (?:(?P<months>\d+)M)?
                   (?:(?P<days>\d+)D)?$""", re.X),
        re.compile(r"""^P(?:(?P<years>\d+)Y)?
                   (?:(?P<months>\d+)M)?
                   (?:(?P<days>\d+)D)?
                   T(?:(?P<hours>\d.*)H)?
                   (?:(?P<minutes>\d.*)M)?
                   (?:(?P<seconds>\d.*)S)?$""", re.X),
        re.compile(r"""^P(?P<weeks>\d+)W$""", re.X)
    ]

    def parse(self, expression):
        """Parse an ISO duration expression into a Duration instance."""
        sign_factor = 1
        if expression.startswith("-"):
            sign_factor = -1
            expression = expression[1:]
        for rec_regex in self.DURATION_REGEXES:
            result = rec_regex.search(expression)
            if not result:
                continue
            result_map = result.groupdict()
            for key, value in result_map.items():
                if value is None:
                    result_map.pop(key)
                    continue
                if key in ["years", "months", "days", "weeks"]:
                    value = int(value)
                else:
                    if "," in value:
                        value = value.replace(",", ".")
                    value = float(value)
                result_map[key] = value * sign_factor
            return data.Duration(**result_map)
        if expression.startswith("P") and sign_factor != -1:
            # TimePoint-like duration - don't allow our negative extension.
            try:
                timepoint = parse_timepoint_expression(
                    expression[1:], allow_truncated=False,
                    assumed_time_zone=(0, 0)
                )
            except ISO8601SyntaxError:
                raise ISO8601SyntaxError("duration", expression)
            if timepoint.get_is_week_date():
                raise ISO8601SyntaxError("duration", expression)
            result_map = {}
            result_map["years"] = timepoint.year
            if timepoint.get_is_calendar_date():
                result_map["months"] = timepoint.month_of_year
                result_map["days"] = timepoint.day_of_month
            if timepoint.get_is_ordinal_date():
                result_map["days"] = timepoint.day_of_year
            result_map["hours"] = timepoint.hour_of_day
            if timepoint.minute_of_hour is not None:
                result_map["minutes"] = timepoint.minute_of_hour
            if timepoint.second_of_minute is not None:
                result_map["seconds"] = timepoint.second_of_minute
            return data.Duration(**result_map)
        raise ISO8601SyntaxError("duration", expression)


def parse_timepoint_expression(timepoint_expression, **kwargs):
    """Return a data model that represents timepoint_expression."""
    parser = TimePointParser(**kwargs)
    return parser.parse(timepoint_expression)