PNG  IHDRxsBIT|d pHYs+tEXtSoftwarewww.inkscape.org<,tEXtComment File Manager

File Manager

Path: /opt/alt/python311/lib/python3.11/site-packages/packaging/

Viewing File: markers.py

# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.

from __future__ import annotations

import operator
import os
import platform
import sys
from typing import AbstractSet, Any, Callable, Literal, TypedDict, Union, cast

from ._parser import MarkerAtom, MarkerList, Op, Value, Variable
from ._parser import parse_marker as _parse_marker
from ._tokenizer import ParserSyntaxError
from .specifiers import InvalidSpecifier, Specifier
from .utils import canonicalize_name

__all__ = [
    "EvaluateContext",
    "InvalidMarker",
    "Marker",
    "UndefinedComparison",
    "UndefinedEnvironmentName",
    "default_environment",
]

Operator = Callable[[str, Union[str, AbstractSet[str]]], bool]
EvaluateContext = Literal["metadata", "lock_file", "requirement"]
MARKERS_ALLOWING_SET = {"extras", "dependency_groups"}


class InvalidMarker(ValueError):
    """
    An invalid marker was found, users should refer to PEP 508.
    """


class UndefinedComparison(ValueError):
    """
    An invalid operation was attempted on a value that doesn't support it.
    """


class UndefinedEnvironmentName(ValueError):
    """
    A name was attempted to be used that does not exist inside of the
    environment.
    """


class Environment(TypedDict):
    implementation_name: str
    """The implementation's identifier, e.g. ``'cpython'``."""

    implementation_version: str
    """
    The implementation's version, e.g. ``'3.13.0a2'`` for CPython 3.13.0a2, or
    ``'7.3.13'`` for PyPy3.10 v7.3.13.
    """

    os_name: str
    """
    The value of :py:data:`os.name`. The name of the operating system dependent module
    imported, e.g. ``'posix'``.
    """

    platform_machine: str
    """
    Returns the machine type, e.g. ``'i386'``.

    An empty string if the value cannot be determined.
    """

    platform_release: str
    """
    The system's release, e.g. ``'2.2.0'`` or ``'NT'``.

    An empty string if the value cannot be determined.
    """

    platform_system: str
    """
    The system/OS name, e.g. ``'Linux'``, ``'Windows'`` or ``'Java'``.

    An empty string if the value cannot be determined.
    """

    platform_version: str
    """
    The system's release version, e.g. ``'#3 on degas'``.

    An empty string if the value cannot be determined.
    """

    python_full_version: str
    """
    The Python version as string ``'major.minor.patchlevel'``.

    Note that unlike the Python :py:data:`sys.version`, this value will always include
    the patchlevel (it defaults to 0).
    """

    platform_python_implementation: str
    """
    A string identifying the Python implementation, e.g. ``'CPython'``.
    """

    python_version: str
    """The Python version as string ``'major.minor'``."""

    sys_platform: str
    """
    This string contains a platform identifier that can be used to append
    platform-specific components to :py:data:`sys.path`, for instance.

    For Unix systems, except on Linux and AIX, this is the lowercased OS name as
    returned by ``uname -s`` with the first part of the version as returned by
    ``uname -r`` appended, e.g. ``'sunos5'`` or ``'freebsd8'``, at the time when Python
    was built.
    """


def _normalize_extra_values(results: Any) -> Any:
    """
    Normalize extra values.
    """
    if isinstance(results[0], tuple):
        lhs, op, rhs = results[0]
        if isinstance(lhs, Variable) and lhs.value == "extra":
            normalized_extra = canonicalize_name(rhs.value)
            rhs = Value(normalized_extra)
        elif isinstance(rhs, Variable) and rhs.value == "extra":
            normalized_extra = canonicalize_name(lhs.value)
            lhs = Value(normalized_extra)
        results[0] = lhs, op, rhs
    return results


def _format_marker(
    marker: list[str] | MarkerAtom | str, first: bool | None = True
) -> str:
    assert isinstance(marker, (list, tuple, str))

    # Sometimes we have a structure like [[...]] which is a single item list
    # where the single item is itself it's own list. In that case we want skip
    # the rest of this function so that we don't get extraneous () on the
    # outside.
    if (
        isinstance(marker, list)
        and len(marker) == 1
        and isinstance(marker[0], (list, tuple))
    ):
        return _format_marker(marker[0])

    if isinstance(marker, list):
        inner = (_format_marker(m, first=False) for m in marker)
        if first:
            return " ".join(inner)
        else:
            return "(" + " ".join(inner) + ")"
    elif isinstance(marker, tuple):
        return " ".join([m.serialize() for m in marker])
    else:
        return marker


_operators: dict[str, Operator] = {
    "in": lambda lhs, rhs: lhs in rhs,
    "not in": lambda lhs, rhs: lhs not in rhs,
    "<": operator.lt,
    "<=": operator.le,
    "==": operator.eq,
    "!=": operator.ne,
    ">=": operator.ge,
    ">": operator.gt,
}


def _eval_op(lhs: str, op: Op, rhs: str | AbstractSet[str]) -> bool:
    if isinstance(rhs, str):
        try:
            spec = Specifier("".join([op.serialize(), rhs]))
        except InvalidSpecifier:
            pass
        else:
            return spec.contains(lhs, prereleases=True)

    oper: Operator | None = _operators.get(op.serialize())
    if oper is None:
        raise UndefinedComparison(f"Undefined {op!r} on {lhs!r} and {rhs!r}.")

    return oper(lhs, rhs)


def _normalize(
    lhs: str, rhs: str | AbstractSet[str], key: str
) -> tuple[str, str | AbstractSet[str]]:
    # PEP 685 – Comparison of extra names for optional distribution dependencies
    # https://peps.python.org/pep-0685/
    # > When comparing extra names, tools MUST normalize the names being
    # > compared using the semantics outlined in PEP 503 for names
    if key == "extra":
        assert isinstance(rhs, str), "extra value must be a string"
        return (canonicalize_name(lhs), canonicalize_name(rhs))
    if key in MARKERS_ALLOWING_SET:
        if isinstance(rhs, str):  # pragma: no cover
            return (canonicalize_name(lhs), canonicalize_name(rhs))
        else:
            return (canonicalize_name(lhs), {canonicalize_name(v) for v in rhs})

    # other environment markers don't have such standards
    return lhs, rhs


def _evaluate_markers(
    markers: MarkerList, environment: dict[str, str | AbstractSet[str]]
) -> bool:
    groups: list[list[bool]] = [[]]

    for marker in markers:
        assert isinstance(marker, (list, tuple, str))

        if isinstance(marker, list):
            groups[-1].append(_evaluate_markers(marker, environment))
        elif isinstance(marker, tuple):
            lhs, op, rhs = marker

            if isinstance(lhs, Variable):
                environment_key = lhs.value
                lhs_value = environment[environment_key]
                rhs_value = rhs.value
            else:
                lhs_value = lhs.value
                environment_key = rhs.value
                rhs_value = environment[environment_key]
            assert isinstance(lhs_value, str), "lhs must be a string"
            lhs_value, rhs_value = _normalize(lhs_value, rhs_value, key=environment_key)
            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
        else:
            assert marker in ["and", "or"]
            if marker == "or":
                groups.append([])

    return any(all(item) for item in groups)


def format_full_version(info: sys._version_info) -> str:
    version = f"{info.major}.{info.minor}.{info.micro}"
    kind = info.releaselevel
    if kind != "final":
        version += kind[0] + str(info.serial)
    return version


def default_environment() -> Environment:
    iver = format_full_version(sys.implementation.version)
    implementation_name = sys.implementation.name
    return {
        "implementation_name": implementation_name,
        "implementation_version": iver,
        "os_name": os.name,
        "platform_machine": platform.machine(),
        "platform_release": platform.release(),
        "platform_system": platform.system(),
        "platform_version": platform.version(),
        "python_full_version": platform.python_version(),
        "platform_python_implementation": platform.python_implementation(),
        "python_version": ".".join(platform.python_version_tuple()[:2]),
        "sys_platform": sys.platform,
    }


class Marker:
    def __init__(self, marker: str) -> None:
        # Note: We create a Marker object without calling this constructor in
        #       packaging.requirements.Requirement. If any additional logic is
        #       added here, make sure to mirror/adapt Requirement.
        try:
            self._markers = _normalize_extra_values(_parse_marker(marker))
            # The attribute `_markers` can be described in terms of a recursive type:
            # MarkerList = List[Union[Tuple[Node, ...], str, MarkerList]]
            #
            # For example, the following expression:
            # python_version > "3.6" or (python_version == "3.6" and os_name == "unix")
            #
            # is parsed into:
            # [
            #     (<Variable('python_version')>, <Op('>')>, <Value('3.6')>),
            #     'and',
            #     [
            #         (<Variable('python_version')>, <Op('==')>, <Value('3.6')>),
            #         'or',
            #         (<Variable('os_name')>, <Op('==')>, <Value('unix')>)
            #     ]
            # ]
        except ParserSyntaxError as e:
            raise InvalidMarker(str(e)) from e

    def __str__(self) -> str:
        return _format_marker(self._markers)

    def __repr__(self) -> str:
        return f"<Marker('{self}')>"

    def __hash__(self) -> int:
        return hash((self.__class__.__name__, str(self)))

    def __eq__(self, other: Any) -> bool:
        if not isinstance(other, Marker):
            return NotImplemented

        return str(self) == str(other)

    def evaluate(
        self,
        environment: dict[str, str] | None = None,
        context: EvaluateContext = "metadata",
    ) -> bool:
        """Evaluate a marker.

        Return the boolean from evaluating the given marker against the
        environment. environment is an optional argument to override all or
        part of the determined environment. The *context* parameter specifies what
        context the markers are being evaluated for, which influences what markers
        are considered valid. Acceptable values are "metadata" (for core metadata;
        default), "lock_file", and "requirement" (i.e. all other situations).

        The environment is determined from the current Python process.
        """
        current_environment = cast(
            "dict[str, str | AbstractSet[str]]", default_environment()
        )
        if context == "lock_file":
            current_environment.update(
                extras=frozenset(), dependency_groups=frozenset()
            )
        elif context == "metadata":
            current_environment["extra"] = ""
        if environment is not None:
            current_environment.update(environment)
            # The API used to allow setting extra to None. We need to handle this
            # case for backwards compatibility.
            if "extra" in current_environment and current_environment["extra"] is None:
                current_environment["extra"] = ""

        return _evaluate_markers(
            self._markers, _repair_python_full_version(current_environment)
        )


def _repair_python_full_version(
    env: dict[str, str | AbstractSet[str]],
) -> dict[str, str | AbstractSet[str]]:
    """
    Work around platform.python_version() returning something that is not PEP 440
    compliant for non-tagged Python builds.
    """
    python_full_version = cast(str, env["python_full_version"])
    if python_full_version.endswith("+"):
        env["python_full_version"] = f"{python_full_version}local"
    return env
b IDATxytVսϓ22 A@IR :hCiZ[v*E:WũZA ^dQeQ @ !jZ'>gsV仿$|?g)&x-EIENT ;@xT.i%-X}SvS5.r/UHz^_$-W"w)Ɗ/@Z &IoX P$K}JzX:;` &, ŋui,e6mX ԵrKb1ԗ)DADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADA݀!I*]R;I2$eZ#ORZSrr6mteffu*((Pu'v{DIߔ4^pIm'77WEEE;vƎ4-$]'RI{\I&G :IHJ DWBB=\WR޽m o$K(V9ABB.}jѢv`^?IOȅ} ڶmG}T#FJ`56$-ھ}FI&v;0(h;Б38CӧOWf!;A i:F_m9s&|q%=#wZprrrla A &P\\СC[A#! {olF} `E2}MK/vV)i{4BffV\|ۭX`b@kɶ@%i$K z5zhmX[IXZ` 'b%$r5M4º/l ԃߖxhʔ)[@=} K6IM}^5k㏷݆z ΗÿO:gdGBmyT/@+Vɶ纽z񕏵l.y޴it뭷zV0[Y^>Wsqs}\/@$(T7f.InݺiR$푔n.~?H))\ZRW'Mo~v Ov6oԃxz! S,&xm/yɞԟ?'uaSѽb,8GלKboi&3t7Y,)JJ c[nzӳdE&KsZLӄ I?@&%ӟ۶mSMMњ0iؐSZ,|J+N ~,0A0!5%Q-YQQa3}$_vVrf9f?S8`zDADADADADADADADADAdqP,تmMmg1V?rSI꒟]u|l RCyEf٢9 jURbztѰ!m5~tGj2DhG*{H9)꒟ר3:(+3\?/;TUݭʴ~S6lڧUJ*i$d(#=Yݺd{,p|3B))q:vN0Y.jkק6;SɶVzHJJЀ-utѹսk>QUU\޲~]fFnK?&ߡ5b=z9)^|u_k-[y%ZNU6 7Mi:]ۦtk[n X(e6Bb."8cۭ|~teuuw|ήI-5"~Uk;ZicEmN/:]M> cQ^uiƞ??Ңpc#TUU3UakNwA`:Y_V-8.KKfRitv޲* 9S6ֿj,ՃNOMߤ]z^fOh|<>@Å5 _/Iu?{SY4hK/2]4%it5q]GGe2%iR| W&f*^]??vq[LgE_3f}Fxu~}qd-ږFxu~I N>\;͗O֊:̗WJ@BhW=y|GgwܷH_NY?)Tdi'?խwhlmQi !SUUsw4kӺe4rfxu-[nHtMFj}H_u~w>)oV}(T'ebʒv3_[+vn@Ȭ\S}ot}w=kHFnxg S 0eޢm~l}uqZfFoZuuEg `zt~? b;t%>WTkķh[2eG8LIWx,^\thrl^Ϊ{=dž<}qV@ ⠨Wy^LF_>0UkDuʫuCs$)Iv:IK;6ֲ4{^6եm+l3>݆uM 9u?>Zc }g~qhKwڭeFMM~pМuqǿz6Tb@8@Y|jx](^]gf}M"tG -w.@vOqh~/HII`S[l.6nØXL9vUcOoB\xoǤ'T&IǍQw_wpv[kmO{w~>#=P1Pɞa-we:iǏlHo׈꒟f9SzH?+shk%Fs:qVhqY`jvO'ρ?PyX3lх]˾uV{ݞ]1,MzYNW~̈́ joYn}ȚF߾׮mS]F z+EDxm/d{F{-W-4wY듏:??_gPf ^3ecg ҵs8R2מz@TANGj)}CNi/R~}c:5{!ZHӋӾ6}T]G]7W6^n 9*,YqOZj:P?Q DFL|?-^.Ɵ7}fFh׶xe2Pscz1&5\cn[=Vn[ĶE鎀uˌd3GII k;lNmشOuuRVfBE]ۣeӶu :X-[(er4~LHi6:Ѻ@ԅrST0trk%$Č0ez" *z"T/X9|8.C5Feg}CQ%͞ˣJvL/?j^h&9xF`њZ(&yF&Iݻfg#W;3^{Wo^4'vV[[K';+mӍִ]AC@W?1^{එyh +^]fm~iԵ]AB@WTk̏t uR?l.OIHiYyԶ]Aˀ7c:q}ힽaf6Z~қm(+sK4{^6}T*UUu]n.:kx{:2 _m=sAߤU@?Z-Vކеz왍Nэ{|5 pڶn b p-@sPg]0G7fy-M{GCF'%{4`=$-Ge\ eU:m+Zt'WjO!OAF@ik&t݆ϥ_ e}=]"Wz_.͜E3leWFih|t-wZۍ-uw=6YN{6|} |*={Ѽn.S.z1zjۻTH]흾 DuDvmvK.`V]yY~sI@t?/ϓ. m&["+P?MzovVЫG3-GRR[(!!\_,^%?v@ҵő m`Y)tem8GMx.))A]Y i`ViW`?^~!S#^+ѽGZj?Vģ0.))A꨷lzL*]OXrY`DBBLOj{-MH'ii-ϰ ok7^ )쭡b]UXSְmռY|5*cֽk0B7镹%ڽP#8nȎq}mJr23_>lE5$iwui+ H~F`IjƵ@q \ @#qG0".0" l`„.0! ,AQHN6qzkKJ#o;`Xv2>,tێJJ7Z/*A .@fفjMzkg @TvZH3Zxu6Ra'%O?/dQ5xYkU]Rֽkق@DaS^RSּ5|BeHNN͘p HvcYcC5:y #`οb;z2.!kr}gUWkyZn=f Pvsn3p~;4p˚=ē~NmI] ¾ 0lH[_L hsh_ғߤc_њec)g7VIZ5yrgk̞W#IjӪv>՞y睝M8[|]\շ8M6%|@PZڨI-m>=k='aiRo-x?>Q.}`Ȏ:Wsmu u > .@,&;+!!˱tﭧDQwRW\vF\~Q7>spYw$%A~;~}6¾ g&if_=j,v+UL1(tWake:@Ș>j$Gq2t7S?vL|]u/ .(0E6Mk6hiۺzښOrifޱxm/Gx> Lal%%~{lBsR4*}{0Z/tNIɚpV^#Lf:u@k#RSu =S^ZyuR/.@n&΃z~B=0eg뺆#,Þ[B/?H uUf7y Wy}Bwegל`Wh(||`l`.;Ws?V@"c:iɍL֯PGv6zctM̠':wuW;d=;EveD}9J@B(0iհ bvP1{\P&G7D޴Iy_$-Qjm~Yrr&]CDv%bh|Yzni_ˆR;kg}nJOIIwyuL}{ЌNj}:+3Y?:WJ/N+Rzd=hb;dj͒suݔ@NKMԄ jqzC5@y°hL m;*5ezᕏ=ep XL n?מ:r`۵tŤZ|1v`V뽧_csج'ߤ%oTuumk%%%h)uy]Nk[n 'b2 l.=͜E%gf$[c;s:V-͞WߤWh-j7]4=F-X]>ZLSi[Y*We;Zan(ӇW|e(HNNP5[= r4tP &0<pc#`vTNV GFqvTi*Tyam$ߏWyE*VJKMTfFw>'$-ؽ.Ho.8c"@DADADADADADADADADA~j*֘,N;Pi3599h=goضLgiJ5փy~}&Zd9p֚ e:|hL``b/d9p? fgg+%%hMgXosج, ΩOl0Zh=xdjLmhݻoO[g_l,8a]٭+ӧ0$I]c]:粹:Teꢢ"5a^Kgh,&= =՟^߶“ߢE ܹS J}I%:8 IDAT~,9/ʃPW'Mo}zNƍ쨓zPbNZ~^z=4mswg;5 Y~SVMRXUյڱRf?s:w ;6H:ºi5-maM&O3;1IKeamZh͛7+##v+c ~u~ca]GnF'ټL~PPPbn voC4R,ӟgg %hq}@#M4IÇ Oy^xMZx ) yOw@HkN˖-Sǎmb]X@n+i͖!++K3gd\$mt$^YfJ\8PRF)77Wא!Cl$i:@@_oG I{$# 8磌ŋ91A (Im7֭>}ߴJq7ޗt^ -[ԩSj*}%]&' -ɓ'ꫯVzzvB#;a 7@GxI{j޼ƌ.LÇWBB7`O"I$/@R @eee@۷>}0,ɒ2$53Xs|cS~rpTYYY} kHc %&k.], @ADADADADADADADADA@lT<%''*Lo^={رc5h %$+CnܸQ3fҥK}vUVVs9G R,_{xˇ3o߾;TTTd}馛]uuuG~iԩ@4bnvmvfϞ /Peeeq}}za I~,誫{UWW뮻}_~YƍSMMMYχ֝waw\ďcxꩧtEƍկ_?۷5@u?1kNׯWzz/wy>}zj3 k(ٺuq_Zvf̘:~ ABQ&r|!%KҥKgԞ={<_X-z !CyFUUz~ ABQIIIjݺW$UXXDٳZ~ ABQƍecW$<(~<RSSvZujjjԧOZQu@4 8m&&&jԩg$ď1h ͟?_{768@g =@`)))5o6m3)ѣƌJ;wҿUTT /KZR{~a=@0o<*狔iFɶ[ˎ;T]]OX@?K.ۈxN pppppppppppppppppPfl߾] ,{ァk۶mڿo5BTӦMӴiӴ|r DB2e|An!Dy'tkΝ[A $***t5' "!駟oaDnΝ:t֭[gDШQ06qD;@ x M6v(PiizmZ4ew"@̴ixf [~-Fٱc&IZ2|n!?$@{[HTɏ#@hȎI# _m(F /6Z3z'\r,r!;w2Z3j=~GY7"I$iI.p_"?pN`y DD?: _  Gÿab7J !Bx@0 Bo cG@`1C[@0G @`0C_u V1 aCX>W ` | `!<S `"<. `#c`?cAC4 ?c p#~@0?:08&_MQ1J h#?/`7;I  q 7a wQ A 1 Hp !#<8/#@1Ul7=S=K.4Z?E_$i@!1!E4?`P_  @Bă10#: "aU,xbFY1 [n|n #'vEH:`xb #vD4Y hi.i&EΖv#O H4IŶ}:Ikh @tZRF#(tXҙzZ ?I3l7q@õ|ۍ1,GpuY Ꮿ@hJv#xxk$ v#9 5 }_$c S#=+"K{F*m7`#%H:NRSp6I?sIՖ{Ap$I$I:QRv2$Z @UJ*$]<FO4IENDB`