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rule.py highlighter.py status_codes.py manifest.py

.venv/Lib/site-packages/pip/_vendor/rich/rule.py

from typing import Union

from .align import AlignMethod
from .cells import cell_len, set_cell_size
from .console import Console, ConsoleOptions, RenderResult
from .jupyter import JupyterMixin
from .measure import Measurement
from .style import Style
from .text import Text


class Rule(JupyterMixin):
    """A console renderable to draw a horizontal rule (line).

    Args:
        title (Union[str, Text], optional): Text to render in the rule. Defaults to "".
        characters (str, optional): Character(s) used to draw the line. Defaults to "─".
        style (StyleType, optional): Style of Rule. Defaults to "rule.line".
        end (str, optional): Character at end of Rule. defaults to "\\\\n"
        align (str, optional): How to align the title, one of "left", "center", or "right". Defaults to "center".
    """

    def __init__(
        self,
        title: Union[str, Text] = "",
        *,
        characters: str = "─",
        style: Union[str, Style] = "rule.line",
        end: str = "\n",
        align: AlignMethod = "center",
    ) -> None:
        if cell_len(characters) < 1:
            raise ValueError(
                "'characters' argument must have a cell width of at least 1"
            )
        if align not in ("left", "center", "right"):
            raise ValueError(
                f'invalid value for align, expected "left", "center", "right" (not {align!r})'
            )
        self.title = title
        self.characters = characters
        self.style = style
        self.end = end
        self.align = align

    def __repr__(self) -> str:
        return f"Rule({self.title!r}, {self.characters!r})"

    def __rich_console__(
        self, console: Console, options: ConsoleOptions
    ) -> RenderResult:
        width = options.max_width

        characters = (
            "-"
            if (options.ascii_only and not self.characters.isascii())
            else self.characters
        )

        chars_len = cell_len(characters)
        if not self.title:
            yield self._rule_line(chars_len, width)
            return

        if isinstance(self.title, Text):
            title_text = self.title
        else:
            title_text = console.render_str(self.title, style="rule.text")

        title_text.plain = title_text.plain.replace("\n", " ")
        title_text.expand_tabs()

        required_space = 4 if self.align == "center" else 2
        truncate_width = max(0, width - required_space)
        if not truncate_width:
            yield self._rule_line(chars_len, width)
            return

        rule_text = Text(end=self.end)
        if self.align == "center":
            title_text.truncate(truncate_width, overflow="ellipsis")
            side_width = (width - cell_len(title_text.plain)) // 2
            left = Text(characters * (side_width // chars_len + 1))
            left.truncate(side_width - 1)
            right_length = width - cell_len(left.plain) - cell_len(title_text.plain)
            right = Text(characters * (side_width // chars_len + 1))
            right.truncate(right_length)
            rule_text.append(left.plain + " ", self.style)
            rule_text.append(title_text)
            rule_text.append(" " + right.plain, self.style)
        elif self.align == "left":
            title_text.truncate(truncate_width, overflow="ellipsis")
            rule_text.append(title_text)
            rule_text.append(" ")
            rule_text.append(characters * (width - rule_text.cell_len), self.style)
        elif self.align == "right":
            title_text.truncate(truncate_width, overflow="ellipsis")
            rule_text.append(characters * (width - title_text.cell_len - 1), self.style)
            rule_text.append(" ")
            rule_text.append(title_text)

        rule_text.plain = set_cell_size(rule_text.plain, width)
        yield rule_text

    def _rule_line(self, chars_len: int, width: int) -> Text:
        rule_text = Text(self.characters * ((width // chars_len) + 1), self.style)
        rule_text.truncate(width)
        rule_text.plain = set_cell_size(rule_text.plain, width)
        return rule_text

    def __rich_measure__(
        self, console: Console, options: ConsoleOptions
    ) -> Measurement:
        return Measurement(1, 1)


if __name__ == "__main__":  # pragma: no cover
    import sys

    from pip._vendor.rich.console import Console

    try:
        text = sys.argv[1]
    except IndexError:
        text = "Hello, World"
    console = Console()
    console.print(Rule(title=text))

    console = Console()
    console.print(Rule("foo"), width=4)

131 lines•4.5 KB

python

.venv/Lib/site-packages/pip/_vendor/rich/highlighter.py

Raw Download

import re
from abc import ABC, abstractmethod
from typing import List, Union

from .text import Span, Text


def _combine_regex(*regexes: str) -> str:
    """Combine a number of regexes in to a single regex.

    Returns:
        str: New regex with all regexes ORed together.
    """
    return "|".join(regexes)


class Highlighter(ABC):
    """Abstract base class for highlighters."""

    def __call__(self, text: Union[str, Text]) -> Text:
        """Highlight a str or Text instance.

        Args:
            text (Union[str, ~Text]): Text to highlight.

        Raises:
            TypeError: If not called with text or str.

        Returns:
            Text: A test instance with highlighting applied.
        """
        if isinstance(text, str):
            highlight_text = Text(text)
        elif isinstance(text, Text):
            highlight_text = text.copy()
        else:
            raise TypeError(f"str or Text instance required, not {text!r}")
        self.highlight(highlight_text)
        return highlight_text

    @abstractmethod
    def highlight(self, text: Text) -> None:
        """Apply highlighting in place to text.

        Args:
            text (~Text): A text object highlight.
        """


class NullHighlighter(Highlighter):
    """A highlighter object that doesn't highlight.

    May be used to disable highlighting entirely.

    """

    def highlight(self, text: Text) -> None:
        """Nothing to do"""


class RegexHighlighter(Highlighter):
    """Applies highlighting from a list of regular expressions."""

    highlights: List[str] = []
    base_style: str = ""

    def highlight(self, text: Text) -> None:
        """Highlight :class:`rich.text.Text` using regular expressions.

        Args:
            text (~Text): Text to highlighted.

        """

        highlight_regex = text.highlight_regex
        for re_highlight in self.highlights:
            highlight_regex(re_highlight, style_prefix=self.base_style)


class ReprHighlighter(RegexHighlighter):
    """Highlights the text typically produced from ``__repr__`` methods."""

    base_style = "repr."
    highlights = [
        r"(?P<tag_start><)(?P<tag_name>[-\w.:|]*)(?P<tag_contents>[\w\W]*)(?P<tag_end>>)",
        r'(?P<attrib_name>[\w_]{1,50})=(?P<attrib_value>"?[\w_]+"?)?',
        r"(?P<brace>[][{}()])",
        _combine_regex(
            r"(?P<ipv4>[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})",
            r"(?P<ipv6>([A-Fa-f0-9]{1,4}::?){1,7}[A-Fa-f0-9]{1,4})",
            r"(?P<eui64>(?:[0-9A-Fa-f]{1,2}-){7}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{1,2}:){7}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{4}\.){3}[0-9A-Fa-f]{4})",
            r"(?P<eui48>(?:[0-9A-Fa-f]{1,2}-){5}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{1,2}:){5}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{4}\.){2}[0-9A-Fa-f]{4})",
            r"(?P<uuid>[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12})",
            r"(?P<call>[\w.]*?)\(",
            r"\b(?P<bool_true>True)\b|\b(?P<bool_false>False)\b|\b(?P<none>None)\b",
            r"(?P<ellipsis>\.\.\.)",
            r"(?P<number_complex>(?<!\w)(?:\-?[0-9]+\.?[0-9]*(?:e[-+]?\d+?)?)(?:[-+](?:[0-9]+\.?[0-9]*(?:e[-+]?\d+)?))?j)",
            r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[-+]?\d+?)?\b|0x[0-9a-fA-F]*)",
            r"(?P<path>\B(/[-\w._+]+)*\/)(?P<filename>[-\w._+]*)?",
            r"(?<![\\\w])(?P<str>b?'''.*?(?<!\\)'''|b?'.*?(?<!\\)'|b?\"\"\".*?(?<!\\)\"\"\"|b?\".*?(?<!\\)\")",
            r"(?P<url>(file|https|http|ws|wss)://[-0-9a-zA-Z$_+!`(),.?/;:&=%#~]*)",
        ),
    ]


class JSONHighlighter(RegexHighlighter):
    """Highlights JSON"""

    # Captures the start and end of JSON strings, handling escaped quotes
    JSON_STR = r"(?<![\\\w])(?P<str>b?\".*?(?<!\\)\")"
    JSON_WHITESPACE = {" ", "\n", "\r", "\t"}

    base_style = "json."
    highlights = [
        _combine_regex(
            r"(?P<brace>[\{\[\(\)\]\}])",
            r"\b(?P<bool_true>true)\b|\b(?P<bool_false>false)\b|\b(?P<null>null)\b",
            r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[\-\+]?\d+?)?\b|0x[0-9a-fA-F]*)",
            JSON_STR,
        ),
    ]

    def highlight(self, text: Text) -> None:
        super().highlight(text)

        # Additional work to handle highlighting JSON keys
        plain = text.plain
        append = text.spans.append
        whitespace = self.JSON_WHITESPACE
        for match in re.finditer(self.JSON_STR, plain):
            start, end = match.span()
            cursor = end
            while cursor < len(plain):
                char = plain[cursor]
                cursor += 1
                if char == ":":
                    append(Span(start, end, "json.key"))
                elif char in whitespace:
                    continue
                break


class ISO8601Highlighter(RegexHighlighter):
    """Highlights the ISO8601 date time strings.
    Regex reference: https://www.oreilly.com/library/view/regular-expressions-cookbook/9781449327453/ch04s07.html
    """

    base_style = "iso8601."
    highlights = [
        #
        # Dates
        #
        # Calendar month (e.g. 2008-08). The hyphen is required
        r"^(?P<year>[0-9]{4})-(?P<month>1[0-2]|0[1-9])$",
        # Calendar date w/o hyphens (e.g. 20080830)
        r"^(?P<date>(?P<year>[0-9]{4})(?P<month>1[0-2]|0[1-9])(?P<day>3[01]|0[1-9]|[12][0-9]))$",
        # Ordinal date (e.g. 2008-243). The hyphen is optional
        r"^(?P<date>(?P<year>[0-9]{4})-?(?P<day>36[0-6]|3[0-5][0-9]|[12][0-9]{2}|0[1-9][0-9]|00[1-9]))$",
        #
        # Weeks
        #
        # Week of the year (e.g., 2008-W35). The hyphen is optional
        r"^(?P<date>(?P<year>[0-9]{4})-?W(?P<week>5[0-3]|[1-4][0-9]|0[1-9]))$",
        # Week date (e.g., 2008-W35-6). The hyphens are optional
        r"^(?P<date>(?P<year>[0-9]{4})-?W(?P<week>5[0-3]|[1-4][0-9]|0[1-9])-?(?P<day>[1-7]))$",
        #
        # Times
        #
        # Hours and minutes (e.g., 17:21). The colon is optional
        r"^(?P<time>(?P<hour>2[0-3]|[01][0-9]):?(?P<minute>[0-5][0-9]))$",
        # Hours, minutes, and seconds w/o colons (e.g., 172159)
        r"^(?P<time>(?P<hour>2[0-3]|[01][0-9])(?P<minute>[0-5][0-9])(?P<second>[0-5][0-9]))$",
        # Time zone designator (e.g., Z, +07 or +07:00). The colons and the minutes are optional
        r"^(?P<timezone>(Z|[+-](?:2[0-3]|[01][0-9])(?::?(?:[0-5][0-9]))?))$",
        # Hours, minutes, and seconds with time zone designator (e.g., 17:21:59+07:00).
        # All the colons are optional. The minutes in the time zone designator are also optional
        r"^(?P<time>(?P<hour>2[0-3]|[01][0-9])(?P<minute>[0-5][0-9])(?P<second>[0-5][0-9]))(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9])(?::?(?:[0-5][0-9]))?)$",
        #
        # Date and Time
        #
        # Calendar date with hours, minutes, and seconds (e.g., 2008-08-30 17:21:59 or 20080830 172159).
        # A space is required between the date and the time. The hyphens and colons are optional.
        # This regex matches dates and times that specify some hyphens or colons but omit others.
        # This does not follow ISO 8601
        r"^(?P<date>(?P<year>[0-9]{4})(?P<hyphen>-)?(?P<month>1[0-2]|0[1-9])(?(hyphen)-)(?P<day>3[01]|0[1-9]|[12][0-9])) (?P<time>(?P<hour>2[0-3]|[01][0-9])(?(hyphen):)(?P<minute>[0-5][0-9])(?(hyphen):)(?P<second>[0-5][0-9]))$",
        #
        # XML Schema dates and times
        #
        # Date, with optional time zone (e.g., 2008-08-30 or 2008-08-30+07:00).
        # Hyphens are required. This is the XML Schema 'date' type
        r"^(?P<date>(?P<year>-?(?:[1-9][0-9]*)?[0-9]{4})-(?P<month>1[0-2]|0[1-9])-(?P<day>3[01]|0[1-9]|[12][0-9]))(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
        # Time, with optional fractional seconds and time zone (e.g., 01:45:36 or 01:45:36.123+07:00).
        # There is no limit on the number of digits for the fractional seconds. This is the XML Schema 'time' type
        r"^(?P<time>(?P<hour>2[0-3]|[01][0-9]):(?P<minute>[0-5][0-9]):(?P<second>[0-5][0-9])(?P<frac>\.[0-9]+)?)(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
        # Date and time, with optional fractional seconds and time zone (e.g., 2008-08-30T01:45:36 or 2008-08-30T01:45:36.123Z).
        # This is the XML Schema 'dateTime' type
        r"^(?P<date>(?P<year>-?(?:[1-9][0-9]*)?[0-9]{4})-(?P<month>1[0-2]|0[1-9])-(?P<day>3[01]|0[1-9]|[12][0-9]))T(?P<time>(?P<hour>2[0-3]|[01][0-9]):(?P<minute>[0-5][0-9]):(?P<second>[0-5][0-9])(?P<ms>\.[0-9]+)?)(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
    ]


if __name__ == "__main__":  # pragma: no cover
    from .console import Console

    console = Console()
    console.print("[bold green]hello world![/bold green]")
    console.print("'[bold green]hello world![/bold green]'")

    console.print(" /foo")
    console.print("/foo/")
    console.print("/foo/bar")
    console.print("foo/bar/baz")

    console.print("/foo/bar/baz?foo=bar+egg&egg=baz")
    console.print("/foo/bar/baz/")
    console.print("/foo/bar/baz/egg")
    console.print("/foo/bar/baz/egg.py")
    console.print("/foo/bar/baz/egg.py word")
    console.print(" /foo/bar/baz/egg.py word")
    console.print("foo /foo/bar/baz/egg.py word")
    console.print("foo /foo/bar/ba._++z/egg+.py word")
    console.print("https://example.org?foo=bar#header")

    console.print(1234567.34)
    console.print(1 / 2)
    console.print(-1 / 123123123123)

    console.print(
        "127.0.1.1 bar 192.168.1.4 2001:0db8:85a3:0000:0000:8a2e:0370:7334 foo"
    )
    import json

    console.print_json(json.dumps(obj={"name": "apple", "count": 1}), indent=None)

233 lines•9.4 KB

python

.venv/Lib/site-packages/pip/_vendor/requests/status_codes.py

Raw Download

r"""
The ``codes`` object defines a mapping from common names for HTTP statuses
to their numerical codes, accessible either as attributes or as dictionary
items.

Example::

    >>> import requests
    >>> requests.codes['temporary_redirect']
    307
    >>> requests.codes.teapot
    418
    >>> requests.codes['\o/']
    200

Some codes have multiple names, and both upper- and lower-case versions of
the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
``codes.okay`` all correspond to the HTTP status code 200.
"""

from .structures import LookupDict

_codes = {
    # Informational.
    100: ("continue",),
    101: ("switching_protocols",),
    102: ("processing", "early-hints"),
    103: ("checkpoint",),
    122: ("uri_too_long", "request_uri_too_long"),
    200: ("ok", "okay", "all_ok", "all_okay", "all_good", "\\o/", "✓"),
    201: ("created",),
    202: ("accepted",),
    203: ("non_authoritative_info", "non_authoritative_information"),
    204: ("no_content",),
    205: ("reset_content", "reset"),
    206: ("partial_content", "partial"),
    207: ("multi_status", "multiple_status", "multi_stati", "multiple_stati"),
    208: ("already_reported",),
    226: ("im_used",),
    # Redirection.
    300: ("multiple_choices",),
    301: ("moved_permanently", "moved", "\\o-"),
    302: ("found",),
    303: ("see_other", "other"),
    304: ("not_modified",),
    305: ("use_proxy",),
    306: ("switch_proxy",),
    307: ("temporary_redirect", "temporary_moved", "temporary"),
    308: (
        "permanent_redirect",
        "resume_incomplete",
        "resume",
    ),  # "resume" and "resume_incomplete" to be removed in 3.0
    # Client Error.
    400: ("bad_request", "bad"),
    401: ("unauthorized",),
    402: ("payment_required", "payment"),
    403: ("forbidden",),
    404: ("not_found", "-o-"),
    405: ("method_not_allowed", "not_allowed"),
    406: ("not_acceptable",),
    407: ("proxy_authentication_required", "proxy_auth", "proxy_authentication"),
    408: ("request_timeout", "timeout"),
    409: ("conflict",),
    410: ("gone",),
    411: ("length_required",),
    412: ("precondition_failed", "precondition"),
    413: ("request_entity_too_large", "content_too_large"),
    414: ("request_uri_too_large", "uri_too_long"),
    415: ("unsupported_media_type", "unsupported_media", "media_type"),
    416: (
        "requested_range_not_satisfiable",
        "requested_range",
        "range_not_satisfiable",
    ),
    417: ("expectation_failed",),
    418: ("im_a_teapot", "teapot", "i_am_a_teapot"),
    421: ("misdirected_request",),
    422: ("unprocessable_entity", "unprocessable", "unprocessable_content"),
    423: ("locked",),
    424: ("failed_dependency", "dependency"),
    425: ("unordered_collection", "unordered", "too_early"),
    426: ("upgrade_required", "upgrade"),
    428: ("precondition_required", "precondition"),
    429: ("too_many_requests", "too_many"),
    431: ("header_fields_too_large", "fields_too_large"),
    444: ("no_response", "none"),
    449: ("retry_with", "retry"),
    450: ("blocked_by_windows_parental_controls", "parental_controls"),
    451: ("unavailable_for_legal_reasons", "legal_reasons"),
    499: ("client_closed_request",),
    # Server Error.
    500: ("internal_server_error", "server_error", "/o\\", "✗"),
    501: ("not_implemented",),
    502: ("bad_gateway",),
    503: ("service_unavailable", "unavailable"),
    504: ("gateway_timeout",),
    505: ("http_version_not_supported", "http_version"),
    506: ("variant_also_negotiates",),
    507: ("insufficient_storage",),
    509: ("bandwidth_limit_exceeded", "bandwidth"),
    510: ("not_extended",),
    511: ("network_authentication_required", "network_auth", "network_authentication"),
}

codes = LookupDict(name="status_codes")


def _init():
    for code, titles in _codes.items():
        for title in titles:
            setattr(codes, title, code)
            if not title.startswith(("\\", "/")):
                setattr(codes, title.upper(), code)

    def doc(code):
        names = ", ".join(f"``{n}``" for n in _codes[code])
        return "* %d: %s" % (code, names)

    global __doc__
    __doc__ = (
        __doc__ + "\n" + "\n".join(doc(code) for code in sorted(_codes))
        if __doc__ is not None
        else None
    )


_init()

129 lines•4.2 KB

python

.venv/Lib/site-packages/pip/_vendor/distlib/manifest.py

Raw Download

# -*- coding: utf-8 -*-
#
# Copyright (C) 2012-2023 Python Software Foundation.
# See LICENSE.txt and CONTRIBUTORS.txt.
#
"""
Class representing the list of files in a distribution.

Equivalent to distutils.filelist, but fixes some problems.
"""
import fnmatch
import logging
import os
import re
import sys

from . import DistlibException
from .compat import fsdecode
from .util import convert_path


__all__ = ['Manifest']

logger = logging.getLogger(__name__)

# a \ followed by some spaces + EOL
_COLLAPSE_PATTERN = re.compile('\\\\w*\n', re.M)
_COMMENTED_LINE = re.compile('#.*?(?=\n)|\n(?=$)', re.M | re.S)

#
# Due to the different results returned by fnmatch.translate, we need
# to do slightly different processing for Python 2.7 and 3.2 ... this needed
# to be brought in for Python 3.6 onwards.
#
_PYTHON_VERSION = sys.version_info[:2]


class Manifest(object):
    """
    A list of files built by exploring the filesystem and filtered by applying various
    patterns to what we find there.
    """

    def __init__(self, base=None):
        """
        Initialise an instance.

        :param base: The base directory to explore under.
        """
        self.base = os.path.abspath(os.path.normpath(base or os.getcwd()))
        self.prefix = self.base + os.sep
        self.allfiles = None
        self.files = set()

    #
    # Public API
    #

    def findall(self):
        """Find all files under the base and set ``allfiles`` to the absolute
        pathnames of files found.
        """
        from stat import S_ISREG, S_ISDIR, S_ISLNK

        self.allfiles = allfiles = []
        root = self.base
        stack = [root]
        pop = stack.pop
        push = stack.append

        while stack:
            root = pop()
            names = os.listdir(root)

            for name in names:
                fullname = os.path.join(root, name)

                # Avoid excess stat calls -- just one will do, thank you!
                stat = os.stat(fullname)
                mode = stat.st_mode
                if S_ISREG(mode):
                    allfiles.append(fsdecode(fullname))
                elif S_ISDIR(mode) and not S_ISLNK(mode):
                    push(fullname)

    def add(self, item):
        """
        Add a file to the manifest.

        :param item: The pathname to add. This can be relative to the base.
        """
        if not item.startswith(self.prefix):
            item = os.path.join(self.base, item)
        self.files.add(os.path.normpath(item))

    def add_many(self, items):
        """
        Add a list of files to the manifest.

        :param items: The pathnames to add. These can be relative to the base.
        """
        for item in items:
            self.add(item)

    def sorted(self, wantdirs=False):
        """
        Return sorted files in directory order
        """

        def add_dir(dirs, d):
            dirs.add(d)
            logger.debug('add_dir added %s', d)
            if d != self.base:
                parent, _ = os.path.split(d)
                assert parent not in ('', '/')
                add_dir(dirs, parent)

        result = set(self.files)    # make a copy!
        if wantdirs:
            dirs = set()
            for f in result:
                add_dir(dirs, os.path.dirname(f))
            result |= dirs
        return [os.path.join(*path_tuple) for path_tuple in
                sorted(os.path.split(path) for path in result)]

    def clear(self):
        """Clear all collected files."""
        self.files = set()
        self.allfiles = []

    def process_directive(self, directive):
        """
        Process a directive which either adds some files from ``allfiles`` to
        ``files``, or removes some files from ``files``.

        :param directive: The directive to process. This should be in a format
                     compatible with distutils ``MANIFEST.in`` files:

                     http://docs.python.org/distutils/sourcedist.html#commands
        """
        # Parse the line: split it up, make sure the right number of words
        # is there, and return the relevant words.  'action' is always
        # defined: it's the first word of the line.  Which of the other
        # three are defined depends on the action; it'll be either
        # patterns, (dir and patterns), or (dirpattern).
        action, patterns, thedir, dirpattern = self._parse_directive(directive)

        # OK, now we know that the action is valid and we have the
        # right number of words on the line for that action -- so we
        # can proceed with minimal error-checking.
        if action == 'include':
            for pattern in patterns:
                if not self._include_pattern(pattern, anchor=True):
                    logger.warning('no files found matching %r', pattern)

        elif action == 'exclude':
            for pattern in patterns:
                self._exclude_pattern(pattern, anchor=True)

        elif action == 'global-include':
            for pattern in patterns:
                if not self._include_pattern(pattern, anchor=False):
                    logger.warning('no files found matching %r '
                                   'anywhere in distribution', pattern)

        elif action == 'global-exclude':
            for pattern in patterns:
                self._exclude_pattern(pattern, anchor=False)

        elif action == 'recursive-include':
            for pattern in patterns:
                if not self._include_pattern(pattern, prefix=thedir):
                    logger.warning('no files found matching %r '
                                   'under directory %r', pattern, thedir)

        elif action == 'recursive-exclude':
            for pattern in patterns:
                self._exclude_pattern(pattern, prefix=thedir)

        elif action == 'graft':
            if not self._include_pattern(None, prefix=dirpattern):
                logger.warning('no directories found matching %r',
                               dirpattern)

        elif action == 'prune':
            if not self._exclude_pattern(None, prefix=dirpattern):
                logger.warning('no previously-included directories found '
                               'matching %r', dirpattern)
        else:   # pragma: no cover
            # This should never happen, as it should be caught in
            # _parse_template_line
            raise DistlibException(
                'invalid action %r' % action)

    #
    # Private API
    #

    def _parse_directive(self, directive):
        """
        Validate a directive.
        :param directive: The directive to validate.
        :return: A tuple of action, patterns, thedir, dir_patterns
        """
        words = directive.split()
        if len(words) == 1 and words[0] not in ('include', 'exclude',
                                                'global-include',
                                                'global-exclude',
                                                'recursive-include',
                                                'recursive-exclude',
                                                'graft', 'prune'):
            # no action given, let's use the default 'include'
            words.insert(0, 'include')

        action = words[0]
        patterns = thedir = dir_pattern = None

        if action in ('include', 'exclude',
                      'global-include', 'global-exclude'):
            if len(words) < 2:
                raise DistlibException(
                    '%r expects <pattern1> <pattern2> ...' % action)

            patterns = [convert_path(word) for word in words[1:]]

        elif action in ('recursive-include', 'recursive-exclude'):
            if len(words) < 3:
                raise DistlibException(
                    '%r expects <dir> <pattern1> <pattern2> ...' % action)

            thedir = convert_path(words[1])
            patterns = [convert_path(word) for word in words[2:]]

        elif action in ('graft', 'prune'):
            if len(words) != 2:
                raise DistlibException(
                    '%r expects a single <dir_pattern>' % action)

            dir_pattern = convert_path(words[1])

        else:
            raise DistlibException('unknown action %r' % action)

        return action, patterns, thedir, dir_pattern

    def _include_pattern(self, pattern, anchor=True, prefix=None,
                         is_regex=False):
        """Select strings (presumably filenames) from 'self.files' that
        match 'pattern', a Unix-style wildcard (glob) pattern.

        Patterns are not quite the same as implemented by the 'fnmatch'
        module: '*' and '?'  match non-special characters, where "special"
        is platform-dependent: slash on Unix; colon, slash, and backslash on
        DOS/Windows; and colon on Mac OS.

        If 'anchor' is true (the default), then the pattern match is more
        stringent: "*.py" will match "foo.py" but not "foo/bar.py".  If
        'anchor' is false, both of these will match.

        If 'prefix' is supplied, then only filenames starting with 'prefix'
        (itself a pattern) and ending with 'pattern', with anything in between
        them, will match.  'anchor' is ignored in this case.

        If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
        'pattern' is assumed to be either a string containing a regex or a
        regex object -- no translation is done, the regex is just compiled
        and used as-is.

        Selected strings will be added to self.files.

        Return True if files are found.
        """
        # XXX docstring lying about what the special chars are?
        found = False
        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)

        # delayed loading of allfiles list
        if self.allfiles is None:
            self.findall()

        for name in self.allfiles:
            if pattern_re.search(name):
                self.files.add(name)
                found = True
        return found

    def _exclude_pattern(self, pattern, anchor=True, prefix=None,
                         is_regex=False):
        """Remove strings (presumably filenames) from 'files' that match
        'pattern'.

        Other parameters are the same as for 'include_pattern()', above.
        The list 'self.files' is modified in place. Return True if files are
        found.

        This API is public to allow e.g. exclusion of SCM subdirs, e.g. when
        packaging source distributions
        """
        found = False
        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
        for f in list(self.files):
            if pattern_re.search(f):
                self.files.remove(f)
                found = True
        return found

    def _translate_pattern(self, pattern, anchor=True, prefix=None,
                           is_regex=False):
        """Translate a shell-like wildcard pattern to a compiled regular
        expression.

        Return the compiled regex.  If 'is_regex' true,
        then 'pattern' is directly compiled to a regex (if it's a string)
        or just returned as-is (assumes it's a regex object).
        """
        if is_regex:
            if isinstance(pattern, str):
                return re.compile(pattern)
            else:
                return pattern

        if _PYTHON_VERSION > (3, 2):
            # ditch start and end characters
            start, _, end = self._glob_to_re('_').partition('_')

        if pattern:
            pattern_re = self._glob_to_re(pattern)
            if _PYTHON_VERSION > (3, 2):
                assert pattern_re.startswith(start) and pattern_re.endswith(end)
        else:
            pattern_re = ''

        base = re.escape(os.path.join(self.base, ''))
        if prefix is not None:
            # ditch end of pattern character
            if _PYTHON_VERSION <= (3, 2):
                empty_pattern = self._glob_to_re('')
                prefix_re = self._glob_to_re(prefix)[:-len(empty_pattern)]
            else:
                prefix_re = self._glob_to_re(prefix)
                assert prefix_re.startswith(start) and prefix_re.endswith(end)
                prefix_re = prefix_re[len(start): len(prefix_re) - len(end)]
            sep = os.sep
            if os.sep == '\\':
                sep = r'\\'
            if _PYTHON_VERSION <= (3, 2):
                pattern_re = '^' + base + sep.join((prefix_re,
                                                    '.*' + pattern_re))
            else:
                pattern_re = pattern_re[len(start): len(pattern_re) - len(end)]
                pattern_re = r'%s%s%s%s.*%s%s' % (start, base, prefix_re, sep,
                                                  pattern_re, end)
        else:  # no prefix -- respect anchor flag
            if anchor:
                if _PYTHON_VERSION <= (3, 2):
                    pattern_re = '^' + base + pattern_re
                else:
                    pattern_re = r'%s%s%s' % (start, base, pattern_re[len(start):])

        return re.compile(pattern_re)

    def _glob_to_re(self, pattern):
        """Translate a shell-like glob pattern to a regular expression.

        Return a string containing the regex.  Differs from
        'fnmatch.translate()' in that '*' does not match "special characters"
        (which are platform-specific).
        """
        pattern_re = fnmatch.translate(pattern)

        # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
        # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
        # and by extension they shouldn't match such "special characters" under
        # any OS.  So change all non-escaped dots in the RE to match any
        # character except the special characters (currently: just os.sep).
        sep = os.sep
        if os.sep == '\\':
            # we're using a regex to manipulate a regex, so we need
            # to escape the backslash twice
            sep = r'\\\\'
        escaped = r'\1[^%s]' % sep
        pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, pattern_re)
        return pattern_re

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