diff env/lib/python3.7/site-packages/packaging/markers.py @ 5:9b1c78e6ba9c draft default tip

"planemo upload commit 6c0a8142489327ece472c84e558c47da711a9142"

--- a/env/lib/python3.7/site-packages/packaging/markers.py	Thu May 14 16:47:39 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,328 +0,0 @@
-# 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 absolute_import, division, print_function
-
-import operator
-import os
-import platform
-import sys
-
-from pyparsing import ParseException, ParseResults, stringStart, stringEnd
-from pyparsing import ZeroOrMore, Group, Forward, QuotedString
-from pyparsing import Literal as L  # noqa
-
-from ._compat import string_types
-from ._typing import MYPY_CHECK_RUNNING
-from .specifiers import Specifier, InvalidSpecifier
-
-if MYPY_CHECK_RUNNING:  # pragma: no cover
-    from typing import Any, Callable, Dict, List, Optional, Tuple, Union
-
-    Operator = Callable[[str, str], bool]
-
-
-__all__ = [
-    "InvalidMarker",
-    "UndefinedComparison",
-    "UndefinedEnvironmentName",
-    "Marker",
-    "default_environment",
-]
-
-
-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 Node(object):
-    def __init__(self, value):
-        # type: (Any) -> None
-        self.value = value
-
-    def __str__(self):
-        # type: () -> str
-        return str(self.value)
-
-    def __repr__(self):
-        # type: () -> str
-        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
-
-    def serialize(self):
-        # type: () -> str
-        raise NotImplementedError
-
-
-class Variable(Node):
-    def serialize(self):
-        # type: () -> str
-        return str(self)
-
-
-class Value(Node):
-    def serialize(self):
-        # type: () -> str
-        return '"{0}"'.format(self)
-
-
-class Op(Node):
-    def serialize(self):
-        # type: () -> str
-        return str(self)
-
-
-VARIABLE = (
-    L("implementation_version")
-    | L("platform_python_implementation")
-    | L("implementation_name")
-    | L("python_full_version")
-    | L("platform_release")
-    | L("platform_version")
-    | L("platform_machine")
-    | L("platform_system")
-    | L("python_version")
-    | L("sys_platform")
-    | L("os_name")
-    | L("os.name")  # PEP-345
-    | L("sys.platform")  # PEP-345
-    | L("platform.version")  # PEP-345
-    | L("platform.machine")  # PEP-345
-    | L("platform.python_implementation")  # PEP-345
-    | L("python_implementation")  # undocumented setuptools legacy
-    | L("extra")  # PEP-508
-)
-ALIASES = {
-    "os.name": "os_name",
-    "sys.platform": "sys_platform",
-    "platform.version": "platform_version",
-    "platform.machine": "platform_machine",
-    "platform.python_implementation": "platform_python_implementation",
-    "python_implementation": "platform_python_implementation",
-}
-VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
-
-VERSION_CMP = (
-    L("===") | L("==") | L(">=") | L("<=") | L("!=") | L("~=") | L(">") | L("<")
-)
-
-MARKER_OP = VERSION_CMP | L("not in") | L("in")
-MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
-
-MARKER_VALUE = QuotedString("'") | QuotedString('"')
-MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
-
-BOOLOP = L("and") | L("or")
-
-MARKER_VAR = VARIABLE | MARKER_VALUE
-
-MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
-MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
-
-LPAREN = L("(").suppress()
-RPAREN = L(")").suppress()
-
-MARKER_EXPR = Forward()
-MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
-MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
-
-MARKER = stringStart + MARKER_EXPR + stringEnd
-
-
-def _coerce_parse_result(results):
-    # type: (Union[ParseResults, List[Any]]) -> List[Any]
-    if isinstance(results, ParseResults):
-        return [_coerce_parse_result(i) for i in results]
-    else:
-        return results
-
-
-def _format_marker(marker, first=True):
-    # type: (Union[List[str], Tuple[Node, ...], str], Optional[bool]) -> str
-
-    assert isinstance(marker, (list, tuple, string_types))
-
-    # 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 = {
-    "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,
-}  # type: Dict[str, Operator]
-
-
-def _eval_op(lhs, op, rhs):
-    # type: (str, Op, str) -> bool
-    try:
-        spec = Specifier("".join([op.serialize(), rhs]))
-    except InvalidSpecifier:
-        pass
-    else:
-        return spec.contains(lhs)
-
-    oper = _operators.get(op.serialize())  # type: Optional[Operator]
-    if oper is None:
-        raise UndefinedComparison(
-            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
-        )
-
-    return oper(lhs, rhs)
-
-
-class Undefined(object):
-    pass
-
-
-_undefined = Undefined()
-
-
-def _get_env(environment, name):
-    # type: (Dict[str, str], str) -> str
-    value = environment.get(name, _undefined)  # type: Union[str, Undefined]
-
-    if isinstance(value, Undefined):
-        raise UndefinedEnvironmentName(
-            "{0!r} does not exist in evaluation environment.".format(name)
-        )
-
-    return value
-
-
-def _evaluate_markers(markers, environment):
-    # type: (List[Any], Dict[str, str]) -> bool
-    groups = [[]]  # type: List[List[bool]]
-
-    for marker in markers:
-        assert isinstance(marker, (list, tuple, string_types))
-
-        if isinstance(marker, list):
-            groups[-1].append(_evaluate_markers(marker, environment))
-        elif isinstance(marker, tuple):
-            lhs, op, rhs = marker
-
-            if isinstance(lhs, Variable):
-                lhs_value = _get_env(environment, lhs.value)
-                rhs_value = rhs.value
-            else:
-                lhs_value = lhs.value
-                rhs_value = _get_env(environment, rhs.value)
-
-            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):
-    # type: (sys._version_info) -> str
-    version = "{0.major}.{0.minor}.{0.micro}".format(info)
-    kind = info.releaselevel
-    if kind != "final":
-        version += kind[0] + str(info.serial)
-    return version
-
-
-def default_environment():
-    # type: () -> Dict[str, str]
-    if hasattr(sys, "implementation"):
-        # Ignoring the `sys.implementation` reference for type checking due to
-        # mypy not liking that the attribute doesn't exist in Python 2.7 when
-        # run with the `--py27` flag.
-        iver = format_full_version(sys.implementation.version)  # type: ignore
-        implementation_name = sys.implementation.name  # type: ignore
-    else:
-        iver = "0"
-        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(object):
-    def __init__(self, marker):
-        # type: (str) -> None
-        try:
-            self._markers = _coerce_parse_result(MARKER.parseString(marker))
-        except ParseException as e:
-            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
-                marker, marker[e.loc : e.loc + 8]
-            )
-            raise InvalidMarker(err_str)
-
-    def __str__(self):
-        # type: () -> str
-        return _format_marker(self._markers)
-
-    def __repr__(self):
-        # type: () -> str
-        return "<Marker({0!r})>".format(str(self))
-
-    def evaluate(self, environment=None):
-        # type: (Optional[Dict[str, str]]) -> 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 environment is determined from the current Python process.
-        """
-        current_environment = default_environment()
-        if environment is not None:
-            current_environment.update(environment)
-
-        return _evaluate_markers(self._markers, current_environment)