Update packaging to 21.2. Ref #2497.debt/update-packaging

32 files changed, 2118 insertions, 2026 deletions

diff --git a/changelog.d/2497.change.rst b/changelog.d/2497.change.rst
new file mode 100644
index 00000000..cd38938f
--- /dev/null
+++ b/changelog.d/2497.change.rst
@@ -0,0 +1 @@
+Update packaging to 21.2.
diff --git a/pkg_resources/_vendor/packaging/__about__.py b/pkg_resources/_vendor/packaging/__about__.py
index 4d998578..c359122f 100644
--- a/pkg_resources/_vendor/packaging/__about__.py
+++ b/pkg_resources/_vendor/packaging/__about__.py
@@ -1,7 +1,6 @@
 # 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
 
 __all__ = [
     "__title__",
@@ -18,10 +17,10 @@ __title__ = "packaging"
 __summary__ = "Core utilities for Python packages"
 __uri__ = "https://github.com/pypa/packaging"
 
-__version__ = "20.4"
+__version__ = "21.2"
 
 __author__ = "Donald Stufft and individual contributors"
 __email__ = "donald@stufft.io"
 
 __license__ = "BSD-2-Clause or Apache-2.0"
-__copyright__ = "Copyright 2014-2019 %s" % __author__
+__copyright__ = "2014-2019 %s" % __author__
diff --git a/pkg_resources/_vendor/packaging/__init__.py b/pkg_resources/_vendor/packaging/__init__.py
index a0cf67df..3c50c5dc 100644
--- a/pkg_resources/_vendor/packaging/__init__.py
+++ b/pkg_resources/_vendor/packaging/__init__.py
@@ -1,7 +1,6 @@
 # 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
 
 from .__about__ import (
     __author__,
diff --git a/pkg_resources/_vendor/packaging/_compat.py b/pkg_resources/_vendor/packaging/_compat.py
deleted file mode 100644
index e54bd4ed..00000000
--- a/pkg_resources/_vendor/packaging/_compat.py
+++ /dev/null
@@ -1,38 +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 sys
-
-from ._typing import TYPE_CHECKING
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import Any, Dict, Tuple, Type
-
-
-PY2 = sys.version_info[0] == 2
-PY3 = sys.version_info[0] == 3
-
-# flake8: noqa
-
-if PY3:
-    string_types = (str,)
-else:
-    string_types = (basestring,)
-
-
-def with_metaclass(meta, *bases):
-    # type: (Type[Any], Tuple[Type[Any], ...]) -> Any
-    """
-    Create a base class with a metaclass.
-    """
-    # This requires a bit of explanation: the basic idea is to make a dummy
-    # metaclass for one level of class instantiation that replaces itself with
-    # the actual metaclass.
-    class metaclass(meta):  # type: ignore
-        def __new__(cls, name, this_bases, d):
-            # type: (Type[Any], str, Tuple[Any], Dict[Any, Any]) -> Any
-            return meta(name, bases, d)
-
-    return type.__new__(metaclass, "temporary_class", (), {})
diff --git a/pkg_resources/_vendor/packaging/_manylinux.py b/pkg_resources/_vendor/packaging/_manylinux.py
new file mode 100644
index 00000000..4c379aa6
--- /dev/null
+++ b/pkg_resources/_vendor/packaging/_manylinux.py
@@ -0,0 +1,301 @@
+import collections
+import functools
+import os
+import re
+import struct
+import sys
+import warnings
+from typing import IO, Dict, Iterator, NamedTuple, Optional, Tuple
+
+
+# Python does not provide platform information at sufficient granularity to
+# identify the architecture of the running executable in some cases, so we
+# determine it dynamically by reading the information from the running
+# process. This only applies on Linux, which uses the ELF format.
+class _ELFFileHeader:
+    # https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
+    class _InvalidELFFileHeader(ValueError):
+        """
+        An invalid ELF file header was found.
+        """
+
+    ELF_MAGIC_NUMBER = 0x7F454C46
+    ELFCLASS32 = 1
+    ELFCLASS64 = 2
+    ELFDATA2LSB = 1
+    ELFDATA2MSB = 2
+    EM_386 = 3
+    EM_S390 = 22
+    EM_ARM = 40
+    EM_X86_64 = 62
+    EF_ARM_ABIMASK = 0xFF000000
+    EF_ARM_ABI_VER5 = 0x05000000
+    EF_ARM_ABI_FLOAT_HARD = 0x00000400
+
+    def __init__(self, file: IO[bytes]) -> None:
+        def unpack(fmt: str) -> int:
+            try:
+                data = file.read(struct.calcsize(fmt))
+                result: Tuple[int, ...] = struct.unpack(fmt, data)
+            except struct.error:
+                raise _ELFFileHeader._InvalidELFFileHeader()
+            return result[0]
+
+        self.e_ident_magic = unpack(">I")
+        if self.e_ident_magic != self.ELF_MAGIC_NUMBER:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_class = unpack("B")
+        if self.e_ident_class not in {self.ELFCLASS32, self.ELFCLASS64}:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_data = unpack("B")
+        if self.e_ident_data not in {self.ELFDATA2LSB, self.ELFDATA2MSB}:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_version = unpack("B")
+        self.e_ident_osabi = unpack("B")
+        self.e_ident_abiversion = unpack("B")
+        self.e_ident_pad = file.read(7)
+        format_h = "<H" if self.e_ident_data == self.ELFDATA2LSB else ">H"
+        format_i = "<I" if self.e_ident_data == self.ELFDATA2LSB else ">I"
+        format_q = "<Q" if self.e_ident_data == self.ELFDATA2LSB else ">Q"
+        format_p = format_i if self.e_ident_class == self.ELFCLASS32 else format_q
+        self.e_type = unpack(format_h)
+        self.e_machine = unpack(format_h)
+        self.e_version = unpack(format_i)
+        self.e_entry = unpack(format_p)
+        self.e_phoff = unpack(format_p)
+        self.e_shoff = unpack(format_p)
+        self.e_flags = unpack(format_i)
+        self.e_ehsize = unpack(format_h)
+        self.e_phentsize = unpack(format_h)
+        self.e_phnum = unpack(format_h)
+        self.e_shentsize = unpack(format_h)
+        self.e_shnum = unpack(format_h)
+        self.e_shstrndx = unpack(format_h)
+
+
+def _get_elf_header() -> Optional[_ELFFileHeader]:
+    try:
+        with open(sys.executable, "rb") as f:
+            elf_header = _ELFFileHeader(f)
+    except (OSError, TypeError, _ELFFileHeader._InvalidELFFileHeader):
+        return None
+    return elf_header
+
+
+def _is_linux_armhf() -> bool:
+    # hard-float ABI can be detected from the ELF header of the running
+    # process
+    # https://static.docs.arm.com/ihi0044/g/aaelf32.pdf
+    elf_header = _get_elf_header()
+    if elf_header is None:
+        return False
+    result = elf_header.e_ident_class == elf_header.ELFCLASS32
+    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
+    result &= elf_header.e_machine == elf_header.EM_ARM
+    result &= (
+        elf_header.e_flags & elf_header.EF_ARM_ABIMASK
+    ) == elf_header.EF_ARM_ABI_VER5
+    result &= (
+        elf_header.e_flags & elf_header.EF_ARM_ABI_FLOAT_HARD
+    ) == elf_header.EF_ARM_ABI_FLOAT_HARD
+    return result
+
+
+def _is_linux_i686() -> bool:
+    elf_header = _get_elf_header()
+    if elf_header is None:
+        return False
+    result = elf_header.e_ident_class == elf_header.ELFCLASS32
+    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
+    result &= elf_header.e_machine == elf_header.EM_386
+    return result
+
+
+def _have_compatible_abi(arch: str) -> bool:
+    if arch == "armv7l":
+        return _is_linux_armhf()
+    if arch == "i686":
+        return _is_linux_i686()
+    return arch in {"x86_64", "aarch64", "ppc64", "ppc64le", "s390x"}
+
+
+# If glibc ever changes its major version, we need to know what the last
+# minor version was, so we can build the complete list of all versions.
+# For now, guess what the highest minor version might be, assume it will
+# be 50 for testing. Once this actually happens, update the dictionary
+# with the actual value.
+_LAST_GLIBC_MINOR: Dict[int, int] = collections.defaultdict(lambda: 50)
+
+
+class _GLibCVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+def _glibc_version_string_confstr() -> Optional[str]:
+    """
+    Primary implementation of glibc_version_string using os.confstr.
+    """
+    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
+    # to be broken or missing. This strategy is used in the standard library
+    # platform module.
+    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c/Lib/platform.py#L175-L183
+    try:
+        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17".
+        version_string = os.confstr("CS_GNU_LIBC_VERSION")
+        assert version_string is not None
+        _, version = version_string.split()
+    except (AssertionError, AttributeError, OSError, ValueError):
+        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
+        return None
+    return version
+
+
+def _glibc_version_string_ctypes() -> Optional[str]:
+    """
+    Fallback implementation of glibc_version_string using ctypes.
+    """
+    try:
+        import ctypes
+    except ImportError:
+        return None
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    #
+    # We must also handle the special case where the executable is not a
+    # dynamically linked executable. This can occur when using musl libc,
+    # for example. In this situation, dlopen() will error, leading to an
+    # OSError. Interestingly, at least in the case of musl, there is no
+    # errno set on the OSError. The single string argument used to construct
+    # OSError comes from libc itself and is therefore not portable to
+    # hard code here. In any case, failure to call dlopen() means we
+    # can proceed, so we bail on our attempt.
+    try:
+        process_namespace = ctypes.CDLL(None)
+    except OSError:
+        return None
+
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str: str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+def _glibc_version_string() -> Optional[str]:
+    """Returns glibc version string, or None if not using glibc."""
+    return _glibc_version_string_confstr() or _glibc_version_string_ctypes()
+
+
+def _parse_glibc_version(version_str: str) -> Tuple[int, int]:
+    """Parse glibc version.
+
+    We use a regexp instead of str.split because we want to discard any
+    random junk that might come after the minor version -- this might happen
+    in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    uses version strings like "2.20-2014.11"). See gh-3588.
+    """
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn(
+            "Expected glibc version with 2 components major.minor,"
+            " got: %s" % version_str,
+            RuntimeWarning,
+        )
+        return -1, -1
+    return int(m.group("major")), int(m.group("minor"))
+
+
+@functools.lru_cache()
+def _get_glibc_version() -> Tuple[int, int]:
+    version_str = _glibc_version_string()
+    if version_str is None:
+        return (-1, -1)
+    return _parse_glibc_version(version_str)
+
+
+# From PEP 513, PEP 600
+def _is_compatible(name: str, arch: str, version: _GLibCVersion) -> bool:
+    sys_glibc = _get_glibc_version()
+    if sys_glibc < version:
+        return False
+    # Check for presence of _manylinux module.
+    try:
+        import _manylinux  # noqa
+    except ImportError:
+        return True
+    if hasattr(_manylinux, "manylinux_compatible"):
+        result = _manylinux.manylinux_compatible(version[0], version[1], arch)
+        if result is not None:
+            return bool(result)
+        return True
+    if version == _GLibCVersion(2, 5):
+        if hasattr(_manylinux, "manylinux1_compatible"):
+            return bool(_manylinux.manylinux1_compatible)
+    if version == _GLibCVersion(2, 12):
+        if hasattr(_manylinux, "manylinux2010_compatible"):
+            return bool(_manylinux.manylinux2010_compatible)
+    if version == _GLibCVersion(2, 17):
+        if hasattr(_manylinux, "manylinux2014_compatible"):
+            return bool(_manylinux.manylinux2014_compatible)
+    return True
+
+
+_LEGACY_MANYLINUX_MAP = {
+    # CentOS 7 w/ glibc 2.17 (PEP 599)
+    (2, 17): "manylinux2014",
+    # CentOS 6 w/ glibc 2.12 (PEP 571)
+    (2, 12): "manylinux2010",
+    # CentOS 5 w/ glibc 2.5 (PEP 513)
+    (2, 5): "manylinux1",
+}
+
+
+def platform_tags(linux: str, arch: str) -> Iterator[str]:
+    if not _have_compatible_abi(arch):
+        return
+    # Oldest glibc to be supported regardless of architecture is (2, 17).
+    too_old_glibc2 = _GLibCVersion(2, 16)
+    if arch in {"x86_64", "i686"}:
+        # On x86/i686 also oldest glibc to be supported is (2, 5).
+        too_old_glibc2 = _GLibCVersion(2, 4)
+    current_glibc = _GLibCVersion(*_get_glibc_version())
+    glibc_max_list = [current_glibc]
+    # We can assume compatibility across glibc major versions.
+    # https://sourceware.org/bugzilla/show_bug.cgi?id=24636
+    #
+    # Build a list of maximum glibc versions so that we can
+    # output the canonical list of all glibc from current_glibc
+    # down to too_old_glibc2, including all intermediary versions.
+    for glibc_major in range(current_glibc.major - 1, 1, -1):
+        glibc_minor = _LAST_GLIBC_MINOR[glibc_major]
+        glibc_max_list.append(_GLibCVersion(glibc_major, glibc_minor))
+    for glibc_max in glibc_max_list:
+        if glibc_max.major == too_old_glibc2.major:
+            min_minor = too_old_glibc2.minor
+        else:
+            # For other glibc major versions oldest supported is (x, 0).
+            min_minor = -1
+        for glibc_minor in range(glibc_max.minor, min_minor, -1):
+            glibc_version = _GLibCVersion(glibc_max.major, glibc_minor)
+            tag = "manylinux_{}_{}".format(*glibc_version)
+            if _is_compatible(tag, arch, glibc_version):
+                yield linux.replace("linux", tag)
+            # Handle the legacy manylinux1, manylinux2010, manylinux2014 tags.
+            if glibc_version in _LEGACY_MANYLINUX_MAP:
+                legacy_tag = _LEGACY_MANYLINUX_MAP[glibc_version]
+                if _is_compatible(legacy_tag, arch, glibc_version):
+                    yield linux.replace("linux", legacy_tag)
diff --git a/pkg_resources/_vendor/packaging/_musllinux.py b/pkg_resources/_vendor/packaging/_musllinux.py
new file mode 100644
index 00000000..85450faf
--- /dev/null
+++ b/pkg_resources/_vendor/packaging/_musllinux.py
@@ -0,0 +1,136 @@
+"""PEP 656 support.
+
+This module implements logic to detect if the currently running Python is
+linked against musl, and what musl version is used.
+"""
+
+import contextlib
+import functools
+import operator
+import os
+import re
+import struct
+import subprocess
+import sys
+from typing import IO, Iterator, NamedTuple, Optional, Tuple
+
+
+def _read_unpacked(f: IO[bytes], fmt: str) -> Tuple[int, ...]:
+    return struct.unpack(fmt, f.read(struct.calcsize(fmt)))
+
+
+def _parse_ld_musl_from_elf(f: IO[bytes]) -> Optional[str]:
+    """Detect musl libc location by parsing the Python executable.
+
+    Based on: https://gist.github.com/lyssdod/f51579ae8d93c8657a5564aefc2ffbca
+    ELF header: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.eheader.html
+    """
+    f.seek(0)
+    try:
+        ident = _read_unpacked(f, "16B")
+    except struct.error:
+        return None
+    if ident[:4] != tuple(b"\x7fELF"):  # Invalid magic, not ELF.
+        return None
+    f.seek(struct.calcsize("HHI"), 1)  # Skip file type, machine, and version.
+
+    try:
+        # e_fmt: Format for program header.
+        # p_fmt: Format for section header.
+        # p_idx: Indexes to find p_type, p_offset, and p_filesz.
+        e_fmt, p_fmt, p_idx = {
+            1: ("IIIIHHH", "IIIIIIII", (0, 1, 4)),  # 32-bit.
+            2: ("QQQIHHH", "IIQQQQQQ", (0, 2, 5)),  # 64-bit.
+        }[ident[4]]
+    except KeyError:
+        return None
+    else:
+        p_get = operator.itemgetter(*p_idx)
+
+    # Find the interpreter section and return its content.
+    try:
+        _, e_phoff, _, _, _, e_phentsize, e_phnum = _read_unpacked(f, e_fmt)
+    except struct.error:
+        return None
+    for i in range(e_phnum + 1):
+        f.seek(e_phoff + e_phentsize * i)
+        try:
+            p_type, p_offset, p_filesz = p_get(_read_unpacked(f, p_fmt))
+        except struct.error:
+            return None
+        if p_type != 3:  # Not PT_INTERP.
+            continue
+        f.seek(p_offset)
+        interpreter = os.fsdecode(f.read(p_filesz)).strip("\0")
+        if "musl" not in interpreter:
+            return None
+        return interpreter
+    return None
+
+
+class _MuslVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+def _parse_musl_version(output: str) -> Optional[_MuslVersion]:
+    lines = [n for n in (n.strip() for n in output.splitlines()) if n]
+    if len(lines) < 2 or lines[0][:4] != "musl":
+        return None
+    m = re.match(r"Version (\d+)\.(\d+)", lines[1])
+    if not m:
+        return None
+    return _MuslVersion(major=int(m.group(1)), minor=int(m.group(2)))
+
+
+@functools.lru_cache()
+def _get_musl_version(executable: str) -> Optional[_MuslVersion]:
+    """Detect currently-running musl runtime version.
+
+    This is done by checking the specified executable's dynamic linking
+    information, and invoking the loader to parse its output for a version
+    string. If the loader is musl, the output would be something like::
+
+        musl libc (x86_64)
+        Version 1.2.2
+        Dynamic Program Loader
+    """
+    with contextlib.ExitStack() as stack:
+        try:
+            f = stack.enter_context(open(executable, "rb"))
+        except IOError:
+            return None
+        ld = _parse_ld_musl_from_elf(f)
+    if not ld:
+        return None
+    proc = subprocess.run([ld], stderr=subprocess.PIPE, universal_newlines=True)
+    return _parse_musl_version(proc.stderr)
+
+
+def platform_tags(arch: str) -> Iterator[str]:
+    """Generate musllinux tags compatible to the current platform.
+
+    :param arch: Should be the part of platform tag after the ``linux_``
+        prefix, e.g. ``x86_64``. The ``linux_`` prefix is assumed as a
+        prerequisite for the current platform to be musllinux-compatible.
+
+    :returns: An iterator of compatible musllinux tags.
+    """
+    sys_musl = _get_musl_version(sys.executable)
+    if sys_musl is None:  # Python not dynamically linked against musl.
+        return
+    for minor in range(sys_musl.minor, -1, -1):
+        yield f"musllinux_{sys_musl.major}_{minor}_{arch}"
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import sysconfig
+
+    plat = sysconfig.get_platform()
+    assert plat.startswith("linux-"), "not linux"
+
+    print("plat:", plat)
+    print("musl:", _get_musl_version(sys.executable))
+    print("tags:", end=" ")
+    for t in platform_tags(re.sub(r"[.-]", "_", plat.split("-", 1)[-1])):
+        print(t, end="\n      ")
diff --git a/pkg_resources/_vendor/packaging/_structures.py b/pkg_resources/_vendor/packaging/_structures.py
index 800d5c55..95154975 100644
--- a/pkg_resources/_vendor/packaging/_structures.py
+++ b/pkg_resources/_vendor/packaging/_structures.py
@@ -1,85 +1,66 @@
 # 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
 
 
-class InfinityType(object):
-    def __repr__(self):
-        # type: () -> str
+class InfinityType:
+    def __repr__(self) -> str:
         return "Infinity"
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(repr(self))
 
-    def __lt__(self, other):
-        # type: (object) -> bool
+    def __lt__(self, other: object) -> bool:
         return False
 
-    def __le__(self, other):
-        # type: (object) -> bool
+    def __le__(self, other: object) -> bool:
         return False
 
-    def __eq__(self, other):
-        # type: (object) -> bool
+    def __eq__(self, other: object) -> bool:
         return isinstance(other, self.__class__)
 
-    def __ne__(self, other):
-        # type: (object) -> bool
+    def __ne__(self, other: object) -> bool:
         return not isinstance(other, self.__class__)
 
-    def __gt__(self, other):
-        # type: (object) -> bool
+    def __gt__(self, other: object) -> bool:
         return True
 
-    def __ge__(self, other):
-        # type: (object) -> bool
+    def __ge__(self, other: object) -> bool:
         return True
 
-    def __neg__(self):
-        # type: (object) -> NegativeInfinityType
+    def __neg__(self: object) -> "NegativeInfinityType":
         return NegativeInfinity
 
 
 Infinity = InfinityType()
 
 
-class NegativeInfinityType(object):
-    def __repr__(self):
-        # type: () -> str
+class NegativeInfinityType:
+    def __repr__(self) -> str:
         return "-Infinity"
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(repr(self))
 
-    def __lt__(self, other):
-        # type: (object) -> bool
+    def __lt__(self, other: object) -> bool:
         return True
 
-    def __le__(self, other):
-        # type: (object) -> bool
+    def __le__(self, other: object) -> bool:
         return True
 
-    def __eq__(self, other):
-        # type: (object) -> bool
+    def __eq__(self, other: object) -> bool:
         return isinstance(other, self.__class__)
 
-    def __ne__(self, other):
-        # type: (object) -> bool
+    def __ne__(self, other: object) -> bool:
         return not isinstance(other, self.__class__)
 
-    def __gt__(self, other):
-        # type: (object) -> bool
+    def __gt__(self, other: object) -> bool:
         return False
 
-    def __ge__(self, other):
-        # type: (object) -> bool
+    def __ge__(self, other: object) -> bool:
         return False
 
-    def __neg__(self):
-        # type: (object) -> InfinityType
+    def __neg__(self: object) -> InfinityType:
         return Infinity
 
 
diff --git a/pkg_resources/_vendor/packaging/_typing.py b/pkg_resources/_vendor/packaging/_typing.py
deleted file mode 100644
index 77a8b918..00000000
--- a/pkg_resources/_vendor/packaging/_typing.py
+++ /dev/null
@@ -1,48 +0,0 @@
-"""For neatly implementing static typing in packaging.
-
-`mypy` - the static type analysis tool we use - uses the `typing` module, which
-provides core functionality fundamental to mypy's functioning.
-
-Generally, `typing` would be imported at runtime and used in that fashion -
-it acts as a no-op at runtime and does not have any run-time overhead by
-design.
-
-As it turns out, `typing` is not vendorable - it uses separate sources for
-Python 2/Python 3. Thus, this codebase can not expect it to be present.
-To work around this, mypy allows the typing import to be behind a False-y
-optional to prevent it from running at runtime and type-comments can be used
-to remove the need for the types to be accessible directly during runtime.
-
-This module provides the False-y guard in a nicely named fashion so that a
-curious maintainer can reach here to read this.
-
-In packaging, all static-typing related imports should be guarded as follows:
-
-    from packaging._typing import TYPE_CHECKING
-
-    if TYPE_CHECKING:
-        from typing import ...
-
-Ref: https://github.com/python/mypy/issues/3216
-"""
-
-__all__ = ["TYPE_CHECKING", "cast"]
-
-# The TYPE_CHECKING constant defined by the typing module is False at runtime
-# but True while type checking.
-if False:  # pragma: no cover
-    from typing import TYPE_CHECKING
-else:
-    TYPE_CHECKING = False
-
-# typing's cast syntax requires calling typing.cast at runtime, but we don't
-# want to import typing at runtime. Here, we inform the type checkers that
-# we're importing `typing.cast` as `cast` and re-implement typing.cast's
-# runtime behavior in a block that is ignored by type checkers.
-if TYPE_CHECKING:  # pragma: no cover
-    # not executed at runtime
-    from typing import cast
-else:
-    # executed at runtime
-    def cast(type_, value):  # noqa
-        return value
diff --git a/pkg_resources/_vendor/packaging/markers.py b/pkg_resources/_vendor/packaging/markers.py
index fd1559c1..18769b09 100644
--- a/pkg_resources/_vendor/packaging/markers.py
+++ b/pkg_resources/_vendor/packaging/markers.py
@@ -1,26 +1,26 @@
 # 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 typing import Any, Callable, Dict, List, Optional, Tuple, Union
+
+from pkg_resources.extern.pyparsing import (  # noqa: N817
+    Forward,
+    Group,
+    Literal as L,
+    ParseException,
+    ParseResults,
+    QuotedString,
+    ZeroOrMore,
+    stringEnd,
+    stringStart,
+)
 
-from pkg_resources.extern.pyparsing import ParseException, ParseResults, stringStart, stringEnd
-from pkg_resources.extern.pyparsing import ZeroOrMore, Group, Forward, QuotedString
-from pkg_resources.extern.pyparsing import Literal as L  # noqa
-
-from ._compat import string_types
-from ._typing import TYPE_CHECKING
-from .specifiers import Specifier, InvalidSpecifier
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import Any, Callable, Dict, List, Optional, Tuple, Union
-
-    Operator = Callable[[str, str], bool]
-
+from .specifiers import InvalidSpecifier, Specifier
 
 __all__ = [
     "InvalidMarker",
@@ -30,6 +30,8 @@ __all__ = [
     "default_environment",
 ]
 
+Operator = Callable[[str, str], bool]
+
 
 class InvalidMarker(ValueError):
     """
@@ -50,39 +52,32 @@ class UndefinedEnvironmentName(ValueError):
     """
 
 
-class Node(object):
-    def __init__(self, value):
-        # type: (Any) -> None
+class Node:
+    def __init__(self, value: Any) -> None:
         self.value = value
 
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         return str(self.value)
 
-    def __repr__(self):
-        # type: () -> str
-        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__}('{self}')>"
 
-    def serialize(self):
-        # type: () -> str
+    def serialize(self) -> str:
         raise NotImplementedError
 
 
 class Variable(Node):
-    def serialize(self):
-        # type: () -> str
+    def serialize(self) -> str:
         return str(self)
 
 
 class Value(Node):
-    def serialize(self):
-        # type: () -> str
-        return '"{0}"'.format(self)
+    def serialize(self) -> str:
+        return f'"{self}"'
 
 
 class Op(Node):
-    def serialize(self):
-        # type: () -> str
+    def serialize(self) -> str:
         return str(self)
 
 
@@ -143,18 +138,18 @@ 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]
+def _coerce_parse_result(results: 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
+def _format_marker(
+    marker: Union[List[str], Tuple[Node, ...], str], first: Optional[bool] = True
+) -> str:
 
-    assert isinstance(marker, (list, tuple, string_types))
+    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
@@ -179,7 +174,7 @@ def _format_marker(marker, first=True):
         return marker
 
 
-_operators = {
+_operators: Dict[str, Operator] = {
     "in": lambda lhs, rhs: lhs in rhs,
     "not in": lambda lhs, rhs: lhs not in rhs,
     "<": operator.lt,
@@ -188,11 +183,10 @@ _operators = {
     "!=": operator.ne,
     ">=": operator.ge,
     ">": operator.gt,
-}  # type: Dict[str, Operator]
+}
 
 
-def _eval_op(lhs, op, rhs):
-    # type: (str, Op, str) -> bool
+def _eval_op(lhs: str, op: Op, rhs: str) -> bool:
     try:
         spec = Specifier("".join([op.serialize(), rhs]))
     except InvalidSpecifier:
@@ -200,40 +194,36 @@ def _eval_op(lhs, op, rhs):
     else:
         return spec.contains(lhs)
 
-    oper = _operators.get(op.serialize())  # type: Optional[Operator]
+    oper: Optional[Operator] = _operators.get(op.serialize())
     if oper is None:
-        raise UndefinedComparison(
-            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
-        )
+        raise UndefinedComparison(f"Undefined {op!r} on {lhs!r} and {rhs!r}.")
 
     return oper(lhs, rhs)
 
 
-class Undefined(object):
+class Undefined:
     pass
 
 
 _undefined = Undefined()
 
 
-def _get_env(environment, name):
-    # type: (Dict[str, str], str) -> str
-    value = environment.get(name, _undefined)  # type: Union[str, Undefined]
+def _get_env(environment: Dict[str, str], name: str) -> str:
+    value: Union[str, Undefined] = environment.get(name, _undefined)
 
     if isinstance(value, Undefined):
         raise UndefinedEnvironmentName(
-            "{0!r} does not exist in evaluation environment.".format(name)
+            f"{name!r} does not exist in evaluation environment."
         )
 
     return value
 
 
-def _evaluate_markers(markers, environment):
-    # type: (List[Any], Dict[str, str]) -> bool
-    groups = [[]]  # type: List[List[bool]]
+def _evaluate_markers(markers: List[Any], environment: Dict[str, str]) -> bool:
+    groups: List[List[bool]] = [[]]
 
     for marker in markers:
-        assert isinstance(marker, (list, tuple, string_types))
+        assert isinstance(marker, (list, tuple, str))
 
         if isinstance(marker, list):
             groups[-1].append(_evaluate_markers(marker, environment))
@@ -256,8 +246,7 @@ def _evaluate_markers(markers, environment):
     return any(all(item) for item in groups)
 
 
-def format_full_version(info):
-    # type: (sys._version_info) -> str
+def format_full_version(info: "sys._version_info") -> str:
     version = "{0.major}.{0.minor}.{0.micro}".format(info)
     kind = info.releaselevel
     if kind != "final":
@@ -265,18 +254,9 @@ def format_full_version(info):
     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 = ""
-
+def default_environment() -> Dict[str, str]:
+    iver = format_full_version(sys.implementation.version)
+    implementation_name = sys.implementation.name
     return {
         "implementation_name": implementation_name,
         "implementation_version": iver,
@@ -292,27 +272,23 @@ def default_environment():
     }
 
 
-class Marker(object):
-    def __init__(self, marker):
-        # type: (str) -> None
+class Marker:
+    def __init__(self, marker: 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(
+                f"Invalid marker: {marker!r}, parse error at "
+                f"{marker[e.loc : e.loc + 8]!r}"
             )
-            raise InvalidMarker(err_str)
 
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         return _format_marker(self._markers)
 
-    def __repr__(self):
-        # type: () -> str
-        return "<Marker({0!r})>".format(str(self))
+    def __repr__(self) -> str:
+        return f"<Marker('{self}')>"
 
-    def evaluate(self, environment=None):
-        # type: (Optional[Dict[str, str]]) -> bool
+    def evaluate(self, environment: Optional[Dict[str, str]] = None) -> bool:
         """Evaluate a marker.
 
         Return the boolean from evaluating the given marker against the
diff --git a/pkg_resources/_vendor/packaging/requirements.py b/pkg_resources/_vendor/packaging/requirements.py
index 9495a1df..6af14ec4 100644
--- a/pkg_resources/_vendor/packaging/requirements.py
+++ b/pkg_resources/_vendor/packaging/requirements.py
@@ -1,23 +1,28 @@
 # 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 string
 import re
+import string
+import urllib.parse
+from typing import List, Optional as TOptional, Set
+
+from pkg_resources.extern.pyparsing import (  # noqa
+    Combine,
+    Literal as L,
+    Optional,
+    ParseException,
+    Regex,
+    Word,
+    ZeroOrMore,
+    originalTextFor,
+    stringEnd,
+    stringStart,
+)
 
-from pkg_resources.extern.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
-from pkg_resources.extern.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
-from pkg_resources.extern.pyparsing import Literal as L  # noqa
-from urllib import parse as urlparse
-
-from ._typing import TYPE_CHECKING
 from .markers import MARKER_EXPR, Marker
 from .specifiers import LegacySpecifier, Specifier, SpecifierSet
 
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import List
-
 
 class InvalidRequirement(ValueError):
     """
@@ -55,7 +60,7 @@ VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
 VERSION_MANY = Combine(
     VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE), joinString=",", adjacent=False
 )("_raw_spec")
-_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC = Optional((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY)
 _VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or "")
 
 VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
@@ -79,7 +84,7 @@ REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
 REQUIREMENT.parseString("x[]")
 
 
-class Requirement(object):
+class Requirement:
     """Parse a requirement.
 
     Parse a given requirement string into its parts, such as name, specifier,
@@ -92,54 +97,50 @@ class Requirement(object):
     #       the thing as well as the version? What about the markers?
     # TODO: Can we normalize the name and extra name?
 
-    def __init__(self, requirement_string):
-        # type: (str) -> None
+    def __init__(self, requirement_string: str) -> None:
         try:
             req = REQUIREMENT.parseString(requirement_string)
         except ParseException as e:
             raise InvalidRequirement(
-                'Parse error at "{0!r}": {1}'.format(
-                    requirement_string[e.loc : e.loc + 8], e.msg
-                )
+                f'Parse error at "{ requirement_string[e.loc : e.loc + 8]!r}": {e.msg}'
             )
 
-        self.name = req.name
+        self.name: str = req.name
         if req.url:
-            parsed_url = urlparse.urlparse(req.url)
+            parsed_url = urllib.parse.urlparse(req.url)
             if parsed_url.scheme == "file":
-                if urlparse.urlunparse(parsed_url) != req.url:
+                if urllib.parse.urlunparse(parsed_url) != req.url:
                     raise InvalidRequirement("Invalid URL given")
             elif not (parsed_url.scheme and parsed_url.netloc) or (
                 not parsed_url.scheme and not parsed_url.netloc
             ):
-                raise InvalidRequirement("Invalid URL: {0}".format(req.url))
-            self.url = req.url
+                raise InvalidRequirement(f"Invalid URL: {req.url}")
+            self.url: TOptional[str] = req.url
         else:
             self.url = None
-        self.extras = set(req.extras.asList() if req.extras else [])
-        self.specifier = SpecifierSet(req.specifier)
-        self.marker = req.marker if req.marker else None
+        self.extras: Set[str] = set(req.extras.asList() if req.extras else [])
+        self.specifier: SpecifierSet = SpecifierSet(req.specifier)
+        self.marker: TOptional[Marker] = req.marker if req.marker else None
 
-    def __str__(self):
-        # type: () -> str
-        parts = [self.name]  # type: List[str]
+    def __str__(self) -> str:
+        parts: List[str] = [self.name]
 
         if self.extras:
-            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+            formatted_extras = ",".join(sorted(self.extras))
+            parts.append(f"[{formatted_extras}]")
 
         if self.specifier:
             parts.append(str(self.specifier))
 
         if self.url:
-            parts.append("@ {0}".format(self.url))
+            parts.append(f"@ {self.url}")
             if self.marker:
                 parts.append(" ")
 
         if self.marker:
-            parts.append("; {0}".format(self.marker))
+            parts.append(f"; {self.marker}")
 
         return "".join(parts)
 
-    def __repr__(self):
-        # type: () -> str
-        return "<Requirement({0!r})>".format(str(self))
+    def __repr__(self) -> str:
+        return f"<Requirement('{self}')>"
diff --git a/pkg_resources/_vendor/packaging/specifiers.py b/pkg_resources/_vendor/packaging/specifiers.py
index fe09bb1d..ce66bd4a 100644
--- a/pkg_resources/_vendor/packaging/specifiers.py
+++ b/pkg_resources/_vendor/packaging/specifiers.py
@@ -1,34 +1,33 @@
 # 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 abc
 import functools
 import itertools
 import re
+import warnings
+from typing import (
+    Callable,
+    Dict,
+    Iterable,
+    Iterator,
+    List,
+    Optional,
+    Pattern,
+    Set,
+    Tuple,
+    TypeVar,
+    Union,
+)
 
-from ._compat import string_types, with_metaclass
-from ._typing import TYPE_CHECKING
 from .utils import canonicalize_version
-from .version import Version, LegacyVersion, parse
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import (
-        List,
-        Dict,
-        Union,
-        Iterable,
-        Iterator,
-        Optional,
-        Callable,
-        Tuple,
-        FrozenSet,
-    )
+from .version import LegacyVersion, Version, parse
 
-    ParsedVersion = Union[Version, LegacyVersion]
-    UnparsedVersion = Union[Version, LegacyVersion, str]
-    CallableOperator = Callable[[ParsedVersion, str], bool]
+ParsedVersion = Union[Version, LegacyVersion]
+UnparsedVersion = Union[Version, LegacyVersion, str]
+VersionTypeVar = TypeVar("VersionTypeVar", bound=UnparsedVersion)
+CallableOperator = Callable[[ParsedVersion, str], bool]
 
 
 class InvalidSpecifier(ValueError):
@@ -37,64 +36,58 @@ class InvalidSpecifier(ValueError):
     """
 
 
-class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):  # type: ignore
+class BaseSpecifier(metaclass=abc.ABCMeta):
     @abc.abstractmethod
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         """
         Returns the str representation of this Specifier like object. This
         should be representative of the Specifier itself.
         """
 
     @abc.abstractmethod
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         """
         Returns a hash value for this Specifier like object.
         """
 
     @abc.abstractmethod
-    def __eq__(self, other):
-        # type: (object) -> bool
+    def __eq__(self, other: object) -> bool:
         """
         Returns a boolean representing whether or not the two Specifier like
         objects are equal.
         """
 
     @abc.abstractmethod
-    def __ne__(self, other):
-        # type: (object) -> bool
+    def __ne__(self, other: object) -> bool:
         """
         Returns a boolean representing whether or not the two Specifier like
         objects are not equal.
         """
 
     @abc.abstractproperty
-    def prereleases(self):
-        # type: () -> Optional[bool]
+    def prereleases(self) -> Optional[bool]:
         """
         Returns whether or not pre-releases as a whole are allowed by this
         specifier.
         """
 
     @prereleases.setter
-    def prereleases(self, value):
-        # type: (bool) -> None
+    def prereleases(self, value: bool) -> None:
         """
         Sets whether or not pre-releases as a whole are allowed by this
         specifier.
         """
 
     @abc.abstractmethod
-    def contains(self, item, prereleases=None):
-        # type: (str, Optional[bool]) -> bool
+    def contains(self, item: str, prereleases: Optional[bool] = None) -> bool:
         """
         Determines if the given item is contained within this specifier.
         """
 
     @abc.abstractmethod
-    def filter(self, iterable, prereleases=None):
-        # type: (Iterable[UnparsedVersion], Optional[bool]) -> Iterable[UnparsedVersion]
+    def filter(
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
         """
         Takes an iterable of items and filters them so that only items which
         are contained within this specifier are allowed in it.
@@ -103,48 +96,43 @@ class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):  # type: ignore
 
 class _IndividualSpecifier(BaseSpecifier):
 
-    _operators = {}  # type: Dict[str, str]
+    _operators: Dict[str, str] = {}
+    _regex: Pattern[str]
 
-    def __init__(self, spec="", prereleases=None):
-        # type: (str, Optional[bool]) -> None
+    def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
         match = self._regex.search(spec)
         if not match:
-            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+            raise InvalidSpecifier(f"Invalid specifier: '{spec}'")
 
-        self._spec = (
+        self._spec: Tuple[str, str] = (
             match.group("operator").strip(),
             match.group("version").strip(),
-        )  # type: Tuple[str, str]
+        )
 
         # Store whether or not this Specifier should accept prereleases
         self._prereleases = prereleases
 
-    def __repr__(self):
-        # type: () -> str
+    def __repr__(self) -> str:
         pre = (
-            ", prereleases={0!r}".format(self.prereleases)
+            f", prereleases={self.prereleases!r}"
             if self._prereleases is not None
             else ""
         )
 
-        return "<{0}({1!r}{2})>".format(self.__class__.__name__, str(self), pre)
+        return "<{}({!r}{})>".format(self.__class__.__name__, str(self), pre)
 
-    def __str__(self):
-        # type: () -> str
-        return "{0}{1}".format(*self._spec)
+    def __str__(self) -> str:
+        return "{}{}".format(*self._spec)
 
     @property
-    def _canonical_spec(self):
-        # type: () -> Tuple[str, Union[Version, str]]
+    def _canonical_spec(self) -> Tuple[str, str]:
         return self._spec[0], canonicalize_version(self._spec[1])
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(self._canonical_spec)
 
-    def __eq__(self, other):
-        # type: (object) -> bool
-        if isinstance(other, string_types):
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, str):
             try:
                 other = self.__class__(str(other))
             except InvalidSpecifier:
@@ -154,9 +142,8 @@ class _IndividualSpecifier(BaseSpecifier):
 
         return self._canonical_spec == other._canonical_spec
 
-    def __ne__(self, other):
-        # type: (object) -> bool
-        if isinstance(other, string_types):
+    def __ne__(self, other: object) -> bool:
+        if isinstance(other, str):
             try:
                 other = self.__class__(str(other))
             except InvalidSpecifier:
@@ -166,45 +153,39 @@ class _IndividualSpecifier(BaseSpecifier):
 
         return self._spec != other._spec
 
-    def _get_operator(self, op):
-        # type: (str) -> CallableOperator
-        operator_callable = getattr(
-            self, "_compare_{0}".format(self._operators[op])
-        )  # type: CallableOperator
+    def _get_operator(self, op: str) -> CallableOperator:
+        operator_callable: CallableOperator = getattr(
+            self, f"_compare_{self._operators[op]}"
+        )
         return operator_callable
 
-    def _coerce_version(self, version):
-        # type: (UnparsedVersion) -> ParsedVersion
+    def _coerce_version(self, version: UnparsedVersion) -> ParsedVersion:
         if not isinstance(version, (LegacyVersion, Version)):
             version = parse(version)
         return version
 
     @property
-    def operator(self):
-        # type: () -> str
+    def operator(self) -> str:
         return self._spec[0]
 
     @property
-    def version(self):
-        # type: () -> str
+    def version(self) -> str:
         return self._spec[1]
 
     @property
-    def prereleases(self):
-        # type: () -> Optional[bool]
+    def prereleases(self) -> Optional[bool]:
         return self._prereleases
 
     @prereleases.setter
-    def prereleases(self, value):
-        # type: (bool) -> None
+    def prereleases(self, value: bool) -> None:
         self._prereleases = value
 
-    def __contains__(self, item):
-        # type: (str) -> bool
+    def __contains__(self, item: str) -> bool:
         return self.contains(item)
 
-    def contains(self, item, prereleases=None):
-        # type: (UnparsedVersion, Optional[bool]) -> bool
+    def contains(
+        self, item: UnparsedVersion, prereleases: Optional[bool] = None
+    ) -> bool:
 
         # Determine if prereleases are to be allowed or not.
         if prereleases is None:
@@ -222,11 +203,12 @@ class _IndividualSpecifier(BaseSpecifier):
 
         # Actually do the comparison to determine if this item is contained
         # within this Specifier or not.
-        operator_callable = self._get_operator(self.operator)  # type: CallableOperator
+        operator_callable: CallableOperator = self._get_operator(self.operator)
         return operator_callable(normalized_item, self.version)
 
-    def filter(self, iterable, prereleases=None):
-        # type: (Iterable[UnparsedVersion], Optional[bool]) -> Iterable[UnparsedVersion]
+    def filter(
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
 
         yielded = False
         found_prereleases = []
@@ -240,7 +222,7 @@ class _IndividualSpecifier(BaseSpecifier):
 
             if self.contains(parsed_version, **kw):
                 # If our version is a prerelease, and we were not set to allow
-                # prereleases, then we'll store it for later incase nothing
+                # prereleases, then we'll store it for later in case nothing
                 # else matches this specifier.
                 if parsed_version.is_prerelease and not (
                     prereleases or self.prereleases
@@ -285,44 +267,46 @@ class LegacySpecifier(_IndividualSpecifier):
         ">": "greater_than",
     }
 
-    def _coerce_version(self, version):
-        # type: (Union[ParsedVersion, str]) -> LegacyVersion
+    def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
+        super().__init__(spec, prereleases)
+
+        warnings.warn(
+            "Creating a LegacyVersion has been deprecated and will be "
+            "removed in the next major release",
+            DeprecationWarning,
+        )
+
+    def _coerce_version(self, version: UnparsedVersion) -> LegacyVersion:
         if not isinstance(version, LegacyVersion):
             version = LegacyVersion(str(version))
         return version
 
-    def _compare_equal(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_equal(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective == self._coerce_version(spec)
 
-    def _compare_not_equal(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_not_equal(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective != self._coerce_version(spec)
 
-    def _compare_less_than_equal(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_less_than_equal(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective <= self._coerce_version(spec)
 
-    def _compare_greater_than_equal(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_greater_than_equal(
+        self, prospective: LegacyVersion, spec: str
+    ) -> bool:
         return prospective >= self._coerce_version(spec)
 
-    def _compare_less_than(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_less_than(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective < self._coerce_version(spec)
 
-    def _compare_greater_than(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_greater_than(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective > self._coerce_version(spec)
 
 
 def _require_version_compare(
-    fn  # type: (Callable[[Specifier, ParsedVersion, str], bool])
-):
-    # type: (...) -> Callable[[Specifier, ParsedVersion, str], bool]
+    fn: Callable[["Specifier", ParsedVersion, str], bool]
+) -> Callable[["Specifier", ParsedVersion, str], bool]:
     @functools.wraps(fn)
-    def wrapped(self, prospective, spec):
-        # type: (Specifier, ParsedVersion, str) -> bool
+    def wrapped(self: "Specifier", prospective: ParsedVersion, spec: str) -> bool:
         if not isinstance(prospective, Version):
             return False
         return fn(self, prospective, spec)
@@ -439,8 +423,7 @@ class Specifier(_IndividualSpecifier):
     }
 
     @_require_version_compare
-    def _compare_compatible(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_compatible(self, prospective: ParsedVersion, spec: str) -> bool:
 
         # Compatible releases have an equivalent combination of >= and ==. That
         # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
@@ -449,15 +432,9 @@ class Specifier(_IndividualSpecifier):
         # the other specifiers.
 
         # We want everything but the last item in the version, but we want to
-        # ignore post and dev releases and we want to treat the pre-release as
-        # it's own separate segment.
+        # ignore suffix segments.
         prefix = ".".join(
-            list(
-                itertools.takewhile(
-                    lambda x: (not x.startswith("post") and not x.startswith("dev")),
-                    _version_split(spec),
-                )
-            )[:-1]
+            list(itertools.takewhile(_is_not_suffix, _version_split(spec)))[:-1]
         )
 
         # Add the prefix notation to the end of our string
@@ -468,8 +445,7 @@ class Specifier(_IndividualSpecifier):
         )
 
     @_require_version_compare
-    def _compare_equal(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_equal(self, prospective: ParsedVersion, spec: str) -> bool:
 
         # We need special logic to handle prefix matching
         if spec.endswith(".*"):
@@ -509,13 +485,11 @@ class Specifier(_IndividualSpecifier):
             return prospective == spec_version
 
     @_require_version_compare
-    def _compare_not_equal(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_not_equal(self, prospective: ParsedVersion, spec: str) -> bool:
         return not self._compare_equal(prospective, spec)
 
     @_require_version_compare
-    def _compare_less_than_equal(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_less_than_equal(self, prospective: ParsedVersion, spec: str) -> bool:
 
         # NB: Local version identifiers are NOT permitted in the version
         # specifier, so local version labels can be universally removed from
@@ -523,8 +497,9 @@ class Specifier(_IndividualSpecifier):
         return Version(prospective.public) <= Version(spec)
 
     @_require_version_compare
-    def _compare_greater_than_equal(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_greater_than_equal(
+        self, prospective: ParsedVersion, spec: str
+    ) -> bool:
 
         # NB: Local version identifiers are NOT permitted in the version
         # specifier, so local version labels can be universally removed from
@@ -532,8 +507,7 @@ class Specifier(_IndividualSpecifier):
         return Version(prospective.public) >= Version(spec)
 
     @_require_version_compare
-    def _compare_less_than(self, prospective, spec_str):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_less_than(self, prospective: ParsedVersion, spec_str: str) -> bool:
 
         # Convert our spec to a Version instance, since we'll want to work with
         # it as a version.
@@ -559,8 +533,7 @@ class Specifier(_IndividualSpecifier):
         return True
 
     @_require_version_compare
-    def _compare_greater_than(self, prospective, spec_str):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_greater_than(self, prospective: ParsedVersion, spec_str: str) -> bool:
 
         # Convert our spec to a Version instance, since we'll want to work with
         # it as a version.
@@ -591,13 +564,11 @@ class Specifier(_IndividualSpecifier):
         # same version in the spec.
         return True
 
-    def _compare_arbitrary(self, prospective, spec):
-        # type: (Version, str) -> bool
+    def _compare_arbitrary(self, prospective: Version, spec: str) -> bool:
         return str(prospective).lower() == str(spec).lower()
 
     @property
-    def prereleases(self):
-        # type: () -> bool
+    def prereleases(self) -> bool:
 
         # If there is an explicit prereleases set for this, then we'll just
         # blindly use that.
@@ -622,17 +593,15 @@ class Specifier(_IndividualSpecifier):
         return False
 
     @prereleases.setter
-    def prereleases(self, value):
-        # type: (bool) -> None
+    def prereleases(self, value: bool) -> None:
         self._prereleases = value
 
 
 _prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
 
 
-def _version_split(version):
-    # type: (str) -> List[str]
-    result = []  # type: List[str]
+def _version_split(version: str) -> List[str]:
+    result: List[str] = []
     for item in version.split("."):
         match = _prefix_regex.search(item)
         if match:
@@ -642,8 +611,13 @@ def _version_split(version):
     return result
 
 
-def _pad_version(left, right):
-    # type: (List[str], List[str]) -> Tuple[List[str], List[str]]
+def _is_not_suffix(segment: str) -> bool:
+    return not any(
+        segment.startswith(prefix) for prefix in ("dev", "a", "b", "rc", "post")
+    )
+
+
+def _pad_version(left: List[str], right: List[str]) -> Tuple[List[str], List[str]]:
     left_split, right_split = [], []
 
     # Get the release segment of our versions
@@ -662,8 +636,9 @@ def _pad_version(left, right):
 
 
 class SpecifierSet(BaseSpecifier):
-    def __init__(self, specifiers="", prereleases=None):
-        # type: (str, Optional[bool]) -> None
+    def __init__(
+        self, specifiers: str = "", prereleases: Optional[bool] = None
+    ) -> None:
 
         # Split on , to break each individual specifier into it's own item, and
         # strip each item to remove leading/trailing whitespace.
@@ -671,7 +646,7 @@ class SpecifierSet(BaseSpecifier):
 
         # Parsed each individual specifier, attempting first to make it a
         # Specifier and falling back to a LegacySpecifier.
-        parsed = set()
+        parsed: Set[_IndividualSpecifier] = set()
         for specifier in split_specifiers:
             try:
                 parsed.add(Specifier(specifier))
@@ -685,27 +660,23 @@ class SpecifierSet(BaseSpecifier):
         # we accept prereleases or not.
         self._prereleases = prereleases
 
-    def __repr__(self):
-        # type: () -> str
+    def __repr__(self) -> str:
         pre = (
-            ", prereleases={0!r}".format(self.prereleases)
+            f", prereleases={self.prereleases!r}"
             if self._prereleases is not None
             else ""
         )
 
-        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+        return "<SpecifierSet({!r}{})>".format(str(self), pre)
 
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         return ",".join(sorted(str(s) for s in self._specs))
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(self._specs)
 
-    def __and__(self, other):
-        # type: (Union[SpecifierSet, str]) -> SpecifierSet
-        if isinstance(other, string_types):
+    def __and__(self, other: Union["SpecifierSet", str]) -> "SpecifierSet":
+        if isinstance(other, str):
             other = SpecifierSet(other)
         elif not isinstance(other, SpecifierSet):
             return NotImplemented
@@ -727,35 +698,30 @@ class SpecifierSet(BaseSpecifier):
 
         return specifier
 
-    def __eq__(self, other):
-        # type: (object) -> bool
-        if isinstance(other, (string_types, _IndividualSpecifier)):
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, (str, _IndividualSpecifier)):
             other = SpecifierSet(str(other))
         elif not isinstance(other, SpecifierSet):
             return NotImplemented
 
         return self._specs == other._specs
 
-    def __ne__(self, other):
-        # type: (object) -> bool
-        if isinstance(other, (string_types, _IndividualSpecifier)):
+    def __ne__(self, other: object) -> bool:
+        if isinstance(other, (str, _IndividualSpecifier)):
             other = SpecifierSet(str(other))
         elif not isinstance(other, SpecifierSet):
             return NotImplemented
 
         return self._specs != other._specs
 
-    def __len__(self):
-        # type: () -> int
+    def __len__(self) -> int:
         return len(self._specs)
 
-    def __iter__(self):
-        # type: () -> Iterator[FrozenSet[_IndividualSpecifier]]
+    def __iter__(self) -> Iterator[_IndividualSpecifier]:
         return iter(self._specs)
 
     @property
-    def prereleases(self):
-        # type: () -> Optional[bool]
+    def prereleases(self) -> Optional[bool]:
 
         # If we have been given an explicit prerelease modifier, then we'll
         # pass that through here.
@@ -773,16 +739,15 @@ class SpecifierSet(BaseSpecifier):
         return any(s.prereleases for s in self._specs)
 
     @prereleases.setter
-    def prereleases(self, value):
-        # type: (bool) -> None
+    def prereleases(self, value: bool) -> None:
         self._prereleases = value
 
-    def __contains__(self, item):
-        # type: (Union[ParsedVersion, str]) -> bool
+    def __contains__(self, item: UnparsedVersion) -> bool:
         return self.contains(item)
 
-    def contains(self, item, prereleases=None):
-        # type: (Union[ParsedVersion, str], Optional[bool]) -> bool
+    def contains(
+        self, item: UnparsedVersion, prereleases: Optional[bool] = None
+    ) -> bool:
 
         # Ensure that our item is a Version or LegacyVersion instance.
         if not isinstance(item, (LegacyVersion, Version)):
@@ -810,11 +775,8 @@ class SpecifierSet(BaseSpecifier):
         return all(s.contains(item, prereleases=prereleases) for s in self._specs)
 
     def filter(
-        self,
-        iterable,  # type: Iterable[Union[ParsedVersion, str]]
-        prereleases=None,  # type: Optional[bool]
-    ):
-        # type: (...) -> Iterable[Union[ParsedVersion, str]]
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
 
         # Determine if we're forcing a prerelease or not, if we're not forcing
         # one for this particular filter call, then we'll use whatever the
@@ -833,8 +795,11 @@ class SpecifierSet(BaseSpecifier):
         # which will filter out any pre-releases, unless there are no final
         # releases, and which will filter out LegacyVersion in general.
         else:
-            filtered = []  # type: List[Union[ParsedVersion, str]]
-            found_prereleases = []  # type: List[Union[ParsedVersion, str]]
+            filtered: List[VersionTypeVar] = []
+            found_prereleases: List[VersionTypeVar] = []
+
+            item: UnparsedVersion
+            parsed_version: Union[Version, LegacyVersion]
 
             for item in iterable:
                 # Ensure that we some kind of Version class for this item.
diff --git a/pkg_resources/_vendor/packaging/tags.py b/pkg_resources/_vendor/packaging/tags.py
index 9064910b..e65890a9 100644
--- a/pkg_resources/_vendor/packaging/tags.py
+++ b/pkg_resources/_vendor/packaging/tags.py
@@ -2,62 +2,44 @@
 # 2.0, and the BSD License. See the LICENSE file in the root of this repository
 # for complete details.
 
-from __future__ import absolute_import
-
-import distutils.util
-
-try:
-    from importlib.machinery import EXTENSION_SUFFIXES
-except ImportError:  # pragma: no cover
-    import imp
-
-    EXTENSION_SUFFIXES = [x[0] for x in imp.get_suffixes()]
-    del imp
 import logging
-import os
 import platform
-import re
-import struct
 import sys
 import sysconfig
-import warnings
-
-from ._typing import TYPE_CHECKING, cast
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import (
-        Dict,
-        FrozenSet,
-        IO,
-        Iterable,
-        Iterator,
-        List,
-        Optional,
-        Sequence,
-        Tuple,
-        Union,
-    )
-
-    PythonVersion = Sequence[int]
-    MacVersion = Tuple[int, int]
-    GlibcVersion = Tuple[int, int]
-
+from importlib.machinery import EXTENSION_SUFFIXES
+from typing import (
+    Dict,
+    FrozenSet,
+    Iterable,
+    Iterator,
+    List,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+    cast,
+)
+
+from . import _manylinux, _musllinux
 
 logger = logging.getLogger(__name__)
 
-INTERPRETER_SHORT_NAMES = {
+PythonVersion = Sequence[int]
+MacVersion = Tuple[int, int]
+
+INTERPRETER_SHORT_NAMES: Dict[str, str] = {
     "python": "py",  # Generic.
     "cpython": "cp",
     "pypy": "pp",
     "ironpython": "ip",
     "jython": "jy",
-}  # type: Dict[str, str]
+}
 
 
 _32_BIT_INTERPRETER = sys.maxsize <= 2 ** 32
 
 
-class Tag(object):
+class Tag:
     """
     A representation of the tag triple for a wheel.
 
@@ -65,55 +47,53 @@ class Tag(object):
     is also supported.
     """
 
-    __slots__ = ["_interpreter", "_abi", "_platform"]
+    __slots__ = ["_interpreter", "_abi", "_platform", "_hash"]
 
-    def __init__(self, interpreter, abi, platform):
-        # type: (str, str, str) -> None
+    def __init__(self, interpreter: str, abi: str, platform: str) -> None:
         self._interpreter = interpreter.lower()
         self._abi = abi.lower()
         self._platform = platform.lower()
+        # The __hash__ of every single element in a Set[Tag] will be evaluated each time
+        # that a set calls its `.disjoint()` method, which may be called hundreds of
+        # times when scanning a page of links for packages with tags matching that
+        # Set[Tag]. Pre-computing the value here produces significant speedups for
+        # downstream consumers.
+        self._hash = hash((self._interpreter, self._abi, self._platform))
 
     @property
-    def interpreter(self):
-        # type: () -> str
+    def interpreter(self) -> str:
         return self._interpreter
 
     @property
-    def abi(self):
-        # type: () -> str
+    def abi(self) -> str:
         return self._abi
 
     @property
-    def platform(self):
-        # type: () -> str
+    def platform(self) -> str:
         return self._platform
 
-    def __eq__(self, other):
-        # type: (object) -> bool
+    def __eq__(self, other: object) -> bool:
         if not isinstance(other, Tag):
             return NotImplemented
 
         return (
-            (self.platform == other.platform)
-            and (self.abi == other.abi)
-            and (self.interpreter == other.interpreter)
+            (self._hash == other._hash)  # Short-circuit ASAP for perf reasons.
+            and (self._platform == other._platform)
+            and (self._abi == other._abi)
+            and (self._interpreter == other._interpreter)
         )
 
-    def __hash__(self):
-        # type: () -> int
-        return hash((self._interpreter, self._abi, self._platform))
+    def __hash__(self) -> int:
+        return self._hash
 
-    def __str__(self):
-        # type: () -> str
-        return "{}-{}-{}".format(self._interpreter, self._abi, self._platform)
+    def __str__(self) -> str:
+        return f"{self._interpreter}-{self._abi}-{self._platform}"
 
-    def __repr__(self):
-        # type: () -> str
+    def __repr__(self) -> str:
         return "<{self} @ {self_id}>".format(self=self, self_id=id(self))
 
 
-def parse_tag(tag):
-    # type: (str) -> FrozenSet[Tag]
+def parse_tag(tag: str) -> FrozenSet[Tag]:
     """
     Parses the provided tag (e.g. `py3-none-any`) into a frozenset of Tag instances.
 
@@ -129,24 +109,7 @@ def parse_tag(tag):
     return frozenset(tags)
 
 
-def _warn_keyword_parameter(func_name, kwargs):
-    # type: (str, Dict[str, bool]) -> bool
-    """
-    Backwards-compatibility with Python 2.7 to allow treating 'warn' as keyword-only.
-    """
-    if not kwargs:
-        return False
-    elif len(kwargs) > 1 or "warn" not in kwargs:
-        kwargs.pop("warn", None)
-        arg = next(iter(kwargs.keys()))
-        raise TypeError(
-            "{}() got an unexpected keyword argument {!r}".format(func_name, arg)
-        )
-    return kwargs["warn"]
-
-
-def _get_config_var(name, warn=False):
-    # type: (str, bool) -> Union[int, str, None]
+def _get_config_var(name: str, warn: bool = False) -> Union[int, str, None]:
     value = sysconfig.get_config_var(name)
     if value is None and warn:
         logger.debug(
@@ -155,13 +118,11 @@ def _get_config_var(name, warn=False):
     return value
 
 
-def _normalize_string(string):
-    # type: (str) -> str
+def _normalize_string(string: str) -> str:
     return string.replace(".", "_").replace("-", "_")
 
 
-def _abi3_applies(python_version):
-    # type: (PythonVersion) -> bool
+def _abi3_applies(python_version: PythonVersion) -> bool:
     """
     Determine if the Python version supports abi3.
 
@@ -170,8 +131,7 @@ def _abi3_applies(python_version):
     return len(python_version) > 1 and tuple(python_version) >= (3, 2)
 
 
-def _cpython_abis(py_version, warn=False):
-    # type: (PythonVersion, bool) -> List[str]
+def _cpython_abis(py_version: PythonVersion, warn: bool = False) -> List[str]:
     py_version = tuple(py_version)  # To allow for version comparison.
     abis = []
     version = _version_nodot(py_version[:2])
@@ -197,7 +157,7 @@ def _cpython_abis(py_version, warn=False):
     elif debug:
         # Debug builds can also load "normal" extension modules.
         # We can also assume no UCS-4 or pymalloc requirement.
-        abis.append("cp{version}".format(version=version))
+        abis.append(f"cp{version}")
     abis.insert(
         0,
         "cp{version}{debug}{pymalloc}{ucs4}".format(
@@ -208,12 +168,12 @@ def _cpython_abis(py_version, warn=False):
 
 
 def cpython_tags(
-    python_version=None,  # type: Optional[PythonVersion]
-    abis=None,  # type: Optional[Iterable[str]]
-    platforms=None,  # type: Optional[Iterable[str]]
-    **kwargs  # type: bool
-):
-    # type: (...) -> Iterator[Tag]
+    python_version: Optional[PythonVersion] = None,
+    abis: Optional[Iterable[str]] = None,
+    platforms: Optional[Iterable[str]] = None,
+    *,
+    warn: bool = False,
+) -> Iterator[Tag]:
     """
     Yields the tags for a CPython interpreter.
 
@@ -229,7 +189,6 @@ def cpython_tags(
     If 'abi3' or 'none' are specified in 'abis' then they will be yielded at
     their normal position and not at the beginning.
     """
-    warn = _warn_keyword_parameter("cpython_tags", kwargs)
     if not python_version:
         python_version = sys.version_info[:2]
 
@@ -248,15 +207,13 @@ def cpython_tags(
         except ValueError:
             pass
 
-    platforms = list(platforms or _platform_tags())
+    platforms = list(platforms or platform_tags())
     for abi in abis:
         for platform_ in platforms:
             yield Tag(interpreter, abi, platform_)
     if _abi3_applies(python_version):
-        for tag in (Tag(interpreter, "abi3", platform_) for platform_ in platforms):
-            yield tag
-    for tag in (Tag(interpreter, "none", platform_) for platform_ in platforms):
-        yield tag
+        yield from (Tag(interpreter, "abi3", platform_) for platform_ in platforms)
+    yield from (Tag(interpreter, "none", platform_) for platform_ in platforms)
 
     if _abi3_applies(python_version):
         for minor_version in range(python_version[1] - 1, 1, -1):
@@ -267,20 +224,19 @@ def cpython_tags(
                 yield Tag(interpreter, "abi3", platform_)
 
 
-def _generic_abi():
-    # type: () -> Iterator[str]
+def _generic_abi() -> Iterator[str]:
     abi = sysconfig.get_config_var("SOABI")
     if abi:
         yield _normalize_string(abi)
 
 
 def generic_tags(
-    interpreter=None,  # type: Optional[str]
-    abis=None,  # type: Optional[Iterable[str]]
-    platforms=None,  # type: Optional[Iterable[str]]
-    **kwargs  # type: bool
-):
-    # type: (...) -> Iterator[Tag]
+    interpreter: Optional[str] = None,
+    abis: Optional[Iterable[str]] = None,
+    platforms: Optional[Iterable[str]] = None,
+    *,
+    warn: bool = False,
+) -> Iterator[Tag]:
     """
     Yields the tags for a generic interpreter.
 
@@ -289,14 +245,13 @@ def generic_tags(
 
     The "none" ABI will be added if it was not explicitly provided.
     """
-    warn = _warn_keyword_parameter("generic_tags", kwargs)
     if not interpreter:
         interp_name = interpreter_name()
         interp_version = interpreter_version(warn=warn)
         interpreter = "".join([interp_name, interp_version])
     if abis is None:
         abis = _generic_abi()
-    platforms = list(platforms or _platform_tags())
+    platforms = list(platforms or platform_tags())
     abis = list(abis)
     if "none" not in abis:
         abis.append("none")
@@ -305,8 +260,7 @@ def generic_tags(
             yield Tag(interpreter, abi, platform_)
 
 
-def _py_interpreter_range(py_version):
-    # type: (PythonVersion) -> Iterator[str]
+def _py_interpreter_range(py_version: PythonVersion) -> Iterator[str]:
     """
     Yields Python versions in descending order.
 
@@ -322,11 +276,10 @@ def _py_interpreter_range(py_version):
 
 
 def compatible_tags(
-    python_version=None,  # type: Optional[PythonVersion]
-    interpreter=None,  # type: Optional[str]
-    platforms=None,  # type: Optional[Iterable[str]]
-):
-    # type: (...) -> Iterator[Tag]
+    python_version: Optional[PythonVersion] = None,
+    interpreter: Optional[str] = None,
+    platforms: Optional[Iterable[str]] = None,
+) -> Iterator[Tag]:
     """
     Yields the sequence of tags that are compatible with a specific version of Python.
 
@@ -337,7 +290,7 @@ def compatible_tags(
     """
     if not python_version:
         python_version = sys.version_info[:2]
-    platforms = list(platforms or _platform_tags())
+    platforms = list(platforms or platform_tags())
     for version in _py_interpreter_range(python_version):
         for platform_ in platforms:
             yield Tag(version, "none", platform_)
@@ -347,8 +300,7 @@ def compatible_tags(
         yield Tag(version, "none", "any")
 
 
-def _mac_arch(arch, is_32bit=_32_BIT_INTERPRETER):
-    # type: (str, bool) -> str
+def _mac_arch(arch: str, is_32bit: bool = _32_BIT_INTERPRETER) -> str:
     if not is_32bit:
         return arch
 
@@ -358,8 +310,7 @@ def _mac_arch(arch, is_32bit=_32_BIT_INTERPRETER):
     return "i386"
 
 
-def _mac_binary_formats(version, cpu_arch):
-    # type: (MacVersion, str) -> List[str]
+def _mac_binary_formats(version: MacVersion, cpu_arch: str) -> List[str]:
     formats = [cpu_arch]
     if cpu_arch == "x86_64":
         if version < (10, 4):
@@ -382,12 +333,18 @@ def _mac_binary_formats(version, cpu_arch):
             return []
         formats.extend(["fat32", "fat"])
 
-    formats.append("universal")
+    if cpu_arch in {"arm64", "x86_64"}:
+        formats.append("universal2")
+
+    if cpu_arch in {"x86_64", "i386", "ppc64", "ppc", "intel"}:
+        formats.append("universal")
+
     return formats
 
 
-def mac_platforms(version=None, arch=None):
-    # type: (Optional[MacVersion], Optional[str]) -> Iterator[str]
+def mac_platforms(
+    version: Optional[MacVersion] = None, arch: Optional[str] = None
+) -> Iterator[str]:
     """
     Yields the platform tags for a macOS system.
 
@@ -396,7 +353,7 @@ def mac_platforms(version=None, arch=None):
     generate platform tags for. Both parameters default to the appropriate value
     for the current system.
     """
-    version_str, _, cpu_arch = platform.mac_ver()  # type: ignore
+    version_str, _, cpu_arch = platform.mac_ver()
     if version is None:
         version = cast("MacVersion", tuple(map(int, version_str.split(".")[:2])))
     else:
@@ -405,283 +362,76 @@ def mac_platforms(version=None, arch=None):
         arch = _mac_arch(cpu_arch)
     else:
         arch = arch
-    for minor_version in range(version[1], -1, -1):
-        compat_version = version[0], minor_version
-        binary_formats = _mac_binary_formats(compat_version, arch)
-        for binary_format in binary_formats:
-            yield "macosx_{major}_{minor}_{binary_format}".format(
-                major=compat_version[0],
-                minor=compat_version[1],
-                binary_format=binary_format,
-            )
-
-
-# From PEP 513.
-def _is_manylinux_compatible(name, glibc_version):
-    # type: (str, GlibcVersion) -> bool
-    # Check for presence of _manylinux module.
-    try:
-        import _manylinux  # noqa
-
-        return bool(getattr(_manylinux, name + "_compatible"))
-    except (ImportError, AttributeError):
-        # Fall through to heuristic check below.
-        pass
 
-    return _have_compatible_glibc(*glibc_version)
-
-
-def _glibc_version_string():
-    # type: () -> Optional[str]
-    # Returns glibc version string, or None if not using glibc.
-    return _glibc_version_string_confstr() or _glibc_version_string_ctypes()
-
-
-def _glibc_version_string_confstr():
-    # type: () -> Optional[str]
-    """
-    Primary implementation of glibc_version_string using os.confstr.
-    """
-    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
-    # to be broken or missing. This strategy is used in the standard library
-    # platform module.
-    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c9d0921ff3d70e1127ca1b71/Lib/platform.py#L175-L183
-    try:
-        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17".
-        version_string = os.confstr(  # type: ignore[attr-defined] # noqa: F821
-            "CS_GNU_LIBC_VERSION"
-        )
-        assert version_string is not None
-        _, version = version_string.split()  # type: Tuple[str, str]
-    except (AssertionError, AttributeError, OSError, ValueError):
-        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
-        return None
-    return version
+    if (10, 0) <= version and version < (11, 0):
+        # Prior to Mac OS 11, each yearly release of Mac OS bumped the
+        # "minor" version number.  The major version was always 10.
+        for minor_version in range(version[1], -1, -1):
+            compat_version = 10, minor_version
+            binary_formats = _mac_binary_formats(compat_version, arch)
+            for binary_format in binary_formats:
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=10, minor=minor_version, binary_format=binary_format
+                )
 
+    if version >= (11, 0):
+        # Starting with Mac OS 11, each yearly release bumps the major version
+        # number.   The minor versions are now the midyear updates.
+        for major_version in range(version[0], 10, -1):
+            compat_version = major_version, 0
+            binary_formats = _mac_binary_formats(compat_version, arch)
+            for binary_format in binary_formats:
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=major_version, minor=0, binary_format=binary_format
+                )
 
-def _glibc_version_string_ctypes():
-    # type: () -> Optional[str]
-    """
-    Fallback implementation of glibc_version_string using ctypes.
-    """
-    try:
-        import ctypes
-    except ImportError:
-        return None
-
-    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
-    # manpage says, "If filename is NULL, then the returned handle is for the
-    # main program". This way we can let the linker do the work to figure out
-    # which libc our process is actually using.
-    #
-    # Note: typeshed is wrong here so we are ignoring this line.
-    process_namespace = ctypes.CDLL(None)  # type: ignore
-    try:
-        gnu_get_libc_version = process_namespace.gnu_get_libc_version
-    except AttributeError:
-        # Symbol doesn't exist -> therefore, we are not linked to
-        # glibc.
-        return None
-
-    # Call gnu_get_libc_version, which returns a string like "2.5"
-    gnu_get_libc_version.restype = ctypes.c_char_p
-    version_str = gnu_get_libc_version()  # type: str
-    # py2 / py3 compatibility:
-    if not isinstance(version_str, str):
-        version_str = version_str.decode("ascii")
-
-    return version_str
-
-
-# Separated out from have_compatible_glibc for easier unit testing.
-def _check_glibc_version(version_str, required_major, minimum_minor):
-    # type: (str, int, int) -> bool
-    # Parse string and check against requested version.
-    #
-    # We use a regexp instead of str.split because we want to discard any
-    # random junk that might come after the minor version -- this might happen
-    # in patched/forked versions of glibc (e.g. Linaro's version of glibc
-    # uses version strings like "2.20-2014.11"). See gh-3588.
-    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
-    if not m:
-        warnings.warn(
-            "Expected glibc version with 2 components major.minor,"
-            " got: %s" % version_str,
-            RuntimeWarning,
-        )
-        return False
-    return (
-        int(m.group("major")) == required_major
-        and int(m.group("minor")) >= minimum_minor
-    )
+    if version >= (11, 0):
+        # Mac OS 11 on x86_64 is compatible with binaries from previous releases.
+        # Arm64 support was introduced in 11.0, so no Arm binaries from previous
+        # releases exist.
+        #
+        # However, the "universal2" binary format can have a
+        # macOS version earlier than 11.0 when the x86_64 part of the binary supports
+        # that version of macOS.
+        if arch == "x86_64":
+            for minor_version in range(16, 3, -1):
+                compat_version = 10, minor_version
+                binary_formats = _mac_binary_formats(compat_version, arch)
+                for binary_format in binary_formats:
+                    yield "macosx_{major}_{minor}_{binary_format}".format(
+                        major=compat_version[0],
+                        minor=compat_version[1],
+                        binary_format=binary_format,
+                    )
+        else:
+            for minor_version in range(16, 3, -1):
+                compat_version = 10, minor_version
+                binary_format = "universal2"
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=compat_version[0],
+                    minor=compat_version[1],
+                    binary_format=binary_format,
+                )
 
 
-def _have_compatible_glibc(required_major, minimum_minor):
-    # type: (int, int) -> bool
-    version_str = _glibc_version_string()
-    if version_str is None:
-        return False
-    return _check_glibc_version(version_str, required_major, minimum_minor)
-
-
-# Python does not provide platform information at sufficient granularity to
-# identify the architecture of the running executable in some cases, so we
-# determine it dynamically by reading the information from the running
-# process. This only applies on Linux, which uses the ELF format.
-class _ELFFileHeader(object):
-    # https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
-    class _InvalidELFFileHeader(ValueError):
-        """
-        An invalid ELF file header was found.
-        """
-
-    ELF_MAGIC_NUMBER = 0x7F454C46
-    ELFCLASS32 = 1
-    ELFCLASS64 = 2
-    ELFDATA2LSB = 1
-    ELFDATA2MSB = 2
-    EM_386 = 3
-    EM_S390 = 22
-    EM_ARM = 40
-    EM_X86_64 = 62
-    EF_ARM_ABIMASK = 0xFF000000
-    EF_ARM_ABI_VER5 = 0x05000000
-    EF_ARM_ABI_FLOAT_HARD = 0x00000400
-
-    def __init__(self, file):
-        # type: (IO[bytes]) -> None
-        def unpack(fmt):
-            # type: (str) -> int
-            try:
-                (result,) = struct.unpack(
-                    fmt, file.read(struct.calcsize(fmt))
-                )  # type: (int, )
-            except struct.error:
-                raise _ELFFileHeader._InvalidELFFileHeader()
-            return result
-
-        self.e_ident_magic = unpack(">I")
-        if self.e_ident_magic != self.ELF_MAGIC_NUMBER:
-            raise _ELFFileHeader._InvalidELFFileHeader()
-        self.e_ident_class = unpack("B")
-        if self.e_ident_class not in {self.ELFCLASS32, self.ELFCLASS64}:
-            raise _ELFFileHeader._InvalidELFFileHeader()
-        self.e_ident_data = unpack("B")
-        if self.e_ident_data not in {self.ELFDATA2LSB, self.ELFDATA2MSB}:
-            raise _ELFFileHeader._InvalidELFFileHeader()
-        self.e_ident_version = unpack("B")
-        self.e_ident_osabi = unpack("B")
-        self.e_ident_abiversion = unpack("B")
-        self.e_ident_pad = file.read(7)
-        format_h = "<H" if self.e_ident_data == self.ELFDATA2LSB else ">H"
-        format_i = "<I" if self.e_ident_data == self.ELFDATA2LSB else ">I"
-        format_q = "<Q" if self.e_ident_data == self.ELFDATA2LSB else ">Q"
-        format_p = format_i if self.e_ident_class == self.ELFCLASS32 else format_q
-        self.e_type = unpack(format_h)
-        self.e_machine = unpack(format_h)
-        self.e_version = unpack(format_i)
-        self.e_entry = unpack(format_p)
-        self.e_phoff = unpack(format_p)
-        self.e_shoff = unpack(format_p)
-        self.e_flags = unpack(format_i)
-        self.e_ehsize = unpack(format_h)
-        self.e_phentsize = unpack(format_h)
-        self.e_phnum = unpack(format_h)
-        self.e_shentsize = unpack(format_h)
-        self.e_shnum = unpack(format_h)
-        self.e_shstrndx = unpack(format_h)
-
-
-def _get_elf_header():
-    # type: () -> Optional[_ELFFileHeader]
-    try:
-        with open(sys.executable, "rb") as f:
-            elf_header = _ELFFileHeader(f)
-    except (IOError, OSError, TypeError, _ELFFileHeader._InvalidELFFileHeader):
-        return None
-    return elf_header
-
-
-def _is_linux_armhf():
-    # type: () -> bool
-    # hard-float ABI can be detected from the ELF header of the running
-    # process
-    # https://static.docs.arm.com/ihi0044/g/aaelf32.pdf
-    elf_header = _get_elf_header()
-    if elf_header is None:
-        return False
-    result = elf_header.e_ident_class == elf_header.ELFCLASS32
-    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
-    result &= elf_header.e_machine == elf_header.EM_ARM
-    result &= (
-        elf_header.e_flags & elf_header.EF_ARM_ABIMASK
-    ) == elf_header.EF_ARM_ABI_VER5
-    result &= (
-        elf_header.e_flags & elf_header.EF_ARM_ABI_FLOAT_HARD
-    ) == elf_header.EF_ARM_ABI_FLOAT_HARD
-    return result
-
-
-def _is_linux_i686():
-    # type: () -> bool
-    elf_header = _get_elf_header()
-    if elf_header is None:
-        return False
-    result = elf_header.e_ident_class == elf_header.ELFCLASS32
-    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
-    result &= elf_header.e_machine == elf_header.EM_386
-    return result
-
-
-def _have_compatible_manylinux_abi(arch):
-    # type: (str) -> bool
-    if arch == "armv7l":
-        return _is_linux_armhf()
-    if arch == "i686":
-        return _is_linux_i686()
-    return True
-
-
-def _linux_platforms(is_32bit=_32_BIT_INTERPRETER):
-    # type: (bool) -> Iterator[str]
-    linux = _normalize_string(distutils.util.get_platform())
+def _linux_platforms(is_32bit: bool = _32_BIT_INTERPRETER) -> Iterator[str]:
+    linux = _normalize_string(sysconfig.get_platform())
     if is_32bit:
         if linux == "linux_x86_64":
             linux = "linux_i686"
         elif linux == "linux_aarch64":
             linux = "linux_armv7l"
-    manylinux_support = []
     _, arch = linux.split("_", 1)
-    if _have_compatible_manylinux_abi(arch):
-        if arch in {"x86_64", "i686", "aarch64", "armv7l", "ppc64", "ppc64le", "s390x"}:
-            manylinux_support.append(
-                ("manylinux2014", (2, 17))
-            )  # CentOS 7 w/ glibc 2.17 (PEP 599)
-        if arch in {"x86_64", "i686"}:
-            manylinux_support.append(
-                ("manylinux2010", (2, 12))
-            )  # CentOS 6 w/ glibc 2.12 (PEP 571)
-            manylinux_support.append(
-                ("manylinux1", (2, 5))
-            )  # CentOS 5 w/ glibc 2.5 (PEP 513)
-    manylinux_support_iter = iter(manylinux_support)
-    for name, glibc_version in manylinux_support_iter:
-        if _is_manylinux_compatible(name, glibc_version):
-            yield linux.replace("linux", name)
-            break
-    # Support for a later manylinux implies support for an earlier version.
-    for name, _ in manylinux_support_iter:
-        yield linux.replace("linux", name)
+    yield from _manylinux.platform_tags(linux, arch)
+    yield from _musllinux.platform_tags(arch)
     yield linux
 
 
-def _generic_platforms():
-    # type: () -> Iterator[str]
-    yield _normalize_string(distutils.util.get_platform())
+def _generic_platforms() -> Iterator[str]:
+    yield _normalize_string(sysconfig.get_platform())
 
 
-def _platform_tags():
-    # type: () -> Iterator[str]
+def platform_tags() -> Iterator[str]:
     """
     Provides the platform tags for this installation.
     """
@@ -693,25 +443,18 @@ def _platform_tags():
         return _generic_platforms()
 
 
-def interpreter_name():
-    # type: () -> str
+def interpreter_name() -> str:
     """
     Returns the name of the running interpreter.
     """
-    try:
-        name = sys.implementation.name  # type: ignore
-    except AttributeError:  # pragma: no cover
-        # Python 2.7 compatibility.
-        name = platform.python_implementation().lower()
+    name = sys.implementation.name
     return INTERPRETER_SHORT_NAMES.get(name) or name
 
 
-def interpreter_version(**kwargs):
-    # type: (bool) -> str
+def interpreter_version(*, warn: bool = False) -> str:
     """
     Returns the version of the running interpreter.
     """
-    warn = _warn_keyword_parameter("interpreter_version", kwargs)
     version = _get_config_var("py_version_nodot", warn=warn)
     if version:
         version = str(version)
@@ -720,32 +463,22 @@ def interpreter_version(**kwargs):
     return version
 
 
-def _version_nodot(version):
-    # type: (PythonVersion) -> str
-    if any(v >= 10 for v in version):
-        sep = "_"
-    else:
-        sep = ""
-    return sep.join(map(str, version))
+def _version_nodot(version: PythonVersion) -> str:
+    return "".join(map(str, version))
 
 
-def sys_tags(**kwargs):
-    # type: (bool) -> Iterator[Tag]
+def sys_tags(*, warn: bool = False) -> Iterator[Tag]:
     """
     Returns the sequence of tag triples for the running interpreter.
 
     The order of the sequence corresponds to priority order for the
     interpreter, from most to least important.
     """
-    warn = _warn_keyword_parameter("sys_tags", kwargs)
 
     interp_name = interpreter_name()
     if interp_name == "cp":
-        for tag in cpython_tags(warn=warn):
-            yield tag
+        yield from cpython_tags(warn=warn)
     else:
-        for tag in generic_tags():
-            yield tag
+        yield from generic_tags()
 
-    for tag in compatible_tags():
-        yield tag
+    yield from compatible_tags()
diff --git a/pkg_resources/_vendor/packaging/utils.py b/pkg_resources/_vendor/packaging/utils.py
index 19579c1a..bab11b80 100644
--- a/pkg_resources/_vendor/packaging/utils.py
+++ b/pkg_resources/_vendor/packaging/utils.py
@@ -1,65 +1,136 @@
 # 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 re
+from typing import FrozenSet, NewType, Tuple, Union, cast
 
-from ._typing import TYPE_CHECKING, cast
+from .tags import Tag, parse_tag
 from .version import InvalidVersion, Version
 
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import NewType, Union
+BuildTag = Union[Tuple[()], Tuple[int, str]]
+NormalizedName = NewType("NormalizedName", str)
+
+
+class InvalidWheelFilename(ValueError):
+    """
+    An invalid wheel filename was found, users should refer to PEP 427.
+    """
+
+
+class InvalidSdistFilename(ValueError):
+    """
+    An invalid sdist filename was found, users should refer to the packaging user guide.
+    """
 
-    NormalizedName = NewType("NormalizedName", str)
 
 _canonicalize_regex = re.compile(r"[-_.]+")
+# PEP 427: The build number must start with a digit.
+_build_tag_regex = re.compile(r"(\d+)(.*)")
 
 
-def canonicalize_name(name):
-    # type: (str) -> NormalizedName
+def canonicalize_name(name: str) -> NormalizedName:
     # This is taken from PEP 503.
     value = _canonicalize_regex.sub("-", name).lower()
-    return cast("NormalizedName", value)
+    return cast(NormalizedName, value)
 
 
-def canonicalize_version(_version):
-    # type: (str) -> Union[Version, str]
+def canonicalize_version(version: Union[Version, str]) -> str:
     """
     This is very similar to Version.__str__, but has one subtle difference
     with the way it handles the release segment.
     """
-
-    try:
-        version = Version(_version)
-    except InvalidVersion:
-        # Legacy versions cannot be normalized
-        return _version
+    if isinstance(version, str):
+        try:
+            parsed = Version(version)
+        except InvalidVersion:
+            # Legacy versions cannot be normalized
+            return version
+    else:
+        parsed = version
 
     parts = []
 
     # Epoch
-    if version.epoch != 0:
-        parts.append("{0}!".format(version.epoch))
+    if parsed.epoch != 0:
+        parts.append(f"{parsed.epoch}!")
 
     # Release segment
     # NB: This strips trailing '.0's to normalize
-    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
+    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in parsed.release)))
 
     # Pre-release
-    if version.pre is not None:
-        parts.append("".join(str(x) for x in version.pre))
+    if parsed.pre is not None:
+        parts.append("".join(str(x) for x in parsed.pre))
 
     # Post-release
-    if version.post is not None:
-        parts.append(".post{0}".format(version.post))
+    if parsed.post is not None:
+        parts.append(f".post{parsed.post}")
 
     # Development release
-    if version.dev is not None:
-        parts.append(".dev{0}".format(version.dev))
+    if parsed.dev is not None:
+        parts.append(f".dev{parsed.dev}")
 
     # Local version segment
-    if version.local is not None:
-        parts.append("+{0}".format(version.local))
+    if parsed.local is not None:
+        parts.append(f"+{parsed.local}")
 
     return "".join(parts)
+
+
+def parse_wheel_filename(
+    filename: str,
+) -> Tuple[NormalizedName, Version, BuildTag, FrozenSet[Tag]]:
+    if not filename.endswith(".whl"):
+        raise InvalidWheelFilename(
+            f"Invalid wheel filename (extension must be '.whl'): {filename}"
+        )
+
+    filename = filename[:-4]
+    dashes = filename.count("-")
+    if dashes not in (4, 5):
+        raise InvalidWheelFilename(
+            f"Invalid wheel filename (wrong number of parts): {filename}"
+        )
+
+    parts = filename.split("-", dashes - 2)
+    name_part = parts[0]
+    # See PEP 427 for the rules on escaping the project name
+    if "__" in name_part or re.match(r"^[\w\d._]*$", name_part, re.UNICODE) is None:
+        raise InvalidWheelFilename(f"Invalid project name: {filename}")
+    name = canonicalize_name(name_part)
+    version = Version(parts[1])
+    if dashes == 5:
+        build_part = parts[2]
+        build_match = _build_tag_regex.match(build_part)
+        if build_match is None:
+            raise InvalidWheelFilename(
+                f"Invalid build number: {build_part} in '{filename}'"
+            )
+        build = cast(BuildTag, (int(build_match.group(1)), build_match.group(2)))
+    else:
+        build = ()
+    tags = parse_tag(parts[-1])
+    return (name, version, build, tags)
+
+
+def parse_sdist_filename(filename: str) -> Tuple[NormalizedName, Version]:
+    if filename.endswith(".tar.gz"):
+        file_stem = filename[: -len(".tar.gz")]
+    elif filename.endswith(".zip"):
+        file_stem = filename[: -len(".zip")]
+    else:
+        raise InvalidSdistFilename(
+            f"Invalid sdist filename (extension must be '.tar.gz' or '.zip'):"
+            f" {filename}"
+        )
+
+    # We are requiring a PEP 440 version, which cannot contain dashes,
+    # so we split on the last dash.
+    name_part, sep, version_part = file_stem.rpartition("-")
+    if not sep:
+        raise InvalidSdistFilename(f"Invalid sdist filename: {filename}")
+
+    name = canonicalize_name(name_part)
+    version = Version(version_part)
+    return (name, version)
diff --git a/pkg_resources/_vendor/packaging/version.py b/pkg_resources/_vendor/packaging/version.py
index 00371e86..de9a09a4 100644
--- a/pkg_resources/_vendor/packaging/version.py
+++ b/pkg_resources/_vendor/packaging/version.py
@@ -1,52 +1,45 @@
 # 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 collections
 import itertools
 import re
+import warnings
+from typing import Callable, Iterator, List, Optional, SupportsInt, Tuple, Union
 
-from ._structures import Infinity, NegativeInfinity
-from ._typing import TYPE_CHECKING
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import Callable, Iterator, List, Optional, SupportsInt, Tuple, Union
-
-    from ._structures import InfinityType, NegativeInfinityType
-
-    InfiniteTypes = Union[InfinityType, NegativeInfinityType]
-    PrePostDevType = Union[InfiniteTypes, Tuple[str, int]]
-    SubLocalType = Union[InfiniteTypes, int, str]
-    LocalType = Union[
-        NegativeInfinityType,
-        Tuple[
-            Union[
-                SubLocalType,
-                Tuple[SubLocalType, str],
-                Tuple[NegativeInfinityType, SubLocalType],
-            ],
-            ...,
-        ],
-    ]
-    CmpKey = Tuple[
-        int, Tuple[int, ...], PrePostDevType, PrePostDevType, PrePostDevType, LocalType
-    ]
-    LegacyCmpKey = Tuple[int, Tuple[str, ...]]
-    VersionComparisonMethod = Callable[
-        [Union[CmpKey, LegacyCmpKey], Union[CmpKey, LegacyCmpKey]], bool
-    ]
+from ._structures import Infinity, InfinityType, NegativeInfinity, NegativeInfinityType
 
 __all__ = ["parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"]
 
+InfiniteTypes = Union[InfinityType, NegativeInfinityType]
+PrePostDevType = Union[InfiniteTypes, Tuple[str, int]]
+SubLocalType = Union[InfiniteTypes, int, str]
+LocalType = Union[
+    NegativeInfinityType,
+    Tuple[
+        Union[
+            SubLocalType,
+            Tuple[SubLocalType, str],
+            Tuple[NegativeInfinityType, SubLocalType],
+        ],
+        ...,
+    ],
+]
+CmpKey = Tuple[
+    int, Tuple[int, ...], PrePostDevType, PrePostDevType, PrePostDevType, LocalType
+]
+LegacyCmpKey = Tuple[int, Tuple[str, ...]]
+VersionComparisonMethod = Callable[
+    [Union[CmpKey, LegacyCmpKey], Union[CmpKey, LegacyCmpKey]], bool
+]
 
 _Version = collections.namedtuple(
     "_Version", ["epoch", "release", "dev", "pre", "post", "local"]
 )
 
 
-def parse(version):
-    # type: (str) -> Union[LegacyVersion, Version]
+def parse(version: str) -> Union["LegacyVersion", "Version"]:
     """
     Parse the given version string and return either a :class:`Version` object
     or a :class:`LegacyVersion` object depending on if the given version is
@@ -64,112 +57,111 @@ class InvalidVersion(ValueError):
     """
 
 
-class _BaseVersion(object):
-    _key = None  # type: Union[CmpKey, LegacyCmpKey]
+class _BaseVersion:
+    _key: Union[CmpKey, LegacyCmpKey]
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(self._key)
 
-    def __lt__(self, other):
-        # type: (_BaseVersion) -> bool
-        return self._compare(other, lambda s, o: s < o)
+    # Please keep the duplicated `isinstance` check
+    # in the six comparisons hereunder
+    # unless you find a way to avoid adding overhead function calls.
+    def __lt__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key < other._key
+
+    def __le__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key <= other._key
 
-    def __le__(self, other):
-        # type: (_BaseVersion) -> bool
-        return self._compare(other, lambda s, o: s <= o)
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
 
-    def __eq__(self, other):
-        # type: (object) -> bool
-        return self._compare(other, lambda s, o: s == o)
+        return self._key == other._key
 
-    def __ge__(self, other):
-        # type: (_BaseVersion) -> bool
-        return self._compare(other, lambda s, o: s >= o)
+    def __ge__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
 
-    def __gt__(self, other):
-        # type: (_BaseVersion) -> bool
-        return self._compare(other, lambda s, o: s > o)
+        return self._key >= other._key
 
-    def __ne__(self, other):
-        # type: (object) -> bool
-        return self._compare(other, lambda s, o: s != o)
+    def __gt__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key > other._key
 
-    def _compare(self, other, method):
-        # type: (object, VersionComparisonMethod) -> Union[bool, NotImplemented]
+    def __ne__(self, other: object) -> bool:
         if not isinstance(other, _BaseVersion):
             return NotImplemented
 
-        return method(self._key, other._key)
+        return self._key != other._key
 
 
 class LegacyVersion(_BaseVersion):
-    def __init__(self, version):
-        # type: (str) -> None
+    def __init__(self, version: str) -> None:
         self._version = str(version)
         self._key = _legacy_cmpkey(self._version)
 
-    def __str__(self):
-        # type: () -> str
+        warnings.warn(
+            "Creating a LegacyVersion has been deprecated and will be "
+            "removed in the next major release",
+            DeprecationWarning,
+        )
+
+    def __str__(self) -> str:
         return self._version
 
-    def __repr__(self):
-        # type: () -> str
-        return "<LegacyVersion({0})>".format(repr(str(self)))
+    def __repr__(self) -> str:
+        return f"<LegacyVersion('{self}')>"
 
     @property
-    def public(self):
-        # type: () -> str
+    def public(self) -> str:
         return self._version
 
     @property
-    def base_version(self):
-        # type: () -> str
+    def base_version(self) -> str:
         return self._version
 
     @property
-    def epoch(self):
-        # type: () -> int
+    def epoch(self) -> int:
         return -1
 
     @property
-    def release(self):
-        # type: () -> None
+    def release(self) -> None:
         return None
 
     @property
-    def pre(self):
-        # type: () -> None
+    def pre(self) -> None:
         return None
 
     @property
-    def post(self):
-        # type: () -> None
+    def post(self) -> None:
         return None
 
     @property
-    def dev(self):
-        # type: () -> None
+    def dev(self) -> None:
         return None
 
     @property
-    def local(self):
-        # type: () -> None
+    def local(self) -> None:
         return None
 
     @property
-    def is_prerelease(self):
-        # type: () -> bool
+    def is_prerelease(self) -> bool:
         return False
 
     @property
-    def is_postrelease(self):
-        # type: () -> bool
+    def is_postrelease(self) -> bool:
         return False
 
     @property
-    def is_devrelease(self):
-        # type: () -> bool
+    def is_devrelease(self) -> bool:
         return False
 
 
@@ -184,8 +176,7 @@ _legacy_version_replacement_map = {
 }
 
 
-def _parse_version_parts(s):
-    # type: (str) -> Iterator[str]
+def _parse_version_parts(s: str) -> Iterator[str]:
     for part in _legacy_version_component_re.split(s):
         part = _legacy_version_replacement_map.get(part, part)
 
@@ -202,8 +193,7 @@ def _parse_version_parts(s):
     yield "*final"
 
 
-def _legacy_cmpkey(version):
-    # type: (str) -> LegacyCmpKey
+def _legacy_cmpkey(version: str) -> LegacyCmpKey:
 
     # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
     # greater than or equal to 0. This will effectively put the LegacyVersion,
@@ -213,7 +203,7 @@ def _legacy_cmpkey(version):
 
     # This scheme is taken from pkg_resources.parse_version setuptools prior to
     # it's adoption of the packaging library.
-    parts = []  # type: List[str]
+    parts: List[str] = []
     for part in _parse_version_parts(version.lower()):
         if part.startswith("*"):
             # remove "-" before a prerelease tag
@@ -268,13 +258,12 @@ class Version(_BaseVersion):
 
     _regex = re.compile(r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE)
 
-    def __init__(self, version):
-        # type: (str) -> None
+    def __init__(self, version: str) -> None:
 
         # Validate the version and parse it into pieces
         match = self._regex.search(version)
         if not match:
-            raise InvalidVersion("Invalid version: '{0}'".format(version))
+            raise InvalidVersion(f"Invalid version: '{version}'")
 
         # Store the parsed out pieces of the version
         self._version = _Version(
@@ -298,17 +287,15 @@ class Version(_BaseVersion):
             self._version.local,
         )
 
-    def __repr__(self):
-        # type: () -> str
-        return "<Version({0})>".format(repr(str(self)))
+    def __repr__(self) -> str:
+        return f"<Version('{self}')>"
 
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         parts = []
 
         # Epoch
         if self.epoch != 0:
-            parts.append("{0}!".format(self.epoch))
+            parts.append(f"{self.epoch}!")
 
         # Release segment
         parts.append(".".join(str(x) for x in self.release))
@@ -319,67 +306,59 @@ class Version(_BaseVersion):
 
         # Post-release
         if self.post is not None:
-            parts.append(".post{0}".format(self.post))
+            parts.append(f".post{self.post}")
 
         # Development release
         if self.dev is not None:
-            parts.append(".dev{0}".format(self.dev))
+            parts.append(f".dev{self.dev}")
 
         # Local version segment
         if self.local is not None:
-            parts.append("+{0}".format(self.local))
+            parts.append(f"+{self.local}")
 
         return "".join(parts)
 
     @property
-    def epoch(self):
-        # type: () -> int
-        _epoch = self._version.epoch  # type: int
+    def epoch(self) -> int:
+        _epoch: int = self._version.epoch
         return _epoch
 
     @property
-    def release(self):
-        # type: () -> Tuple[int, ...]
-        _release = self._version.release  # type: Tuple[int, ...]
+    def release(self) -> Tuple[int, ...]:
+        _release: Tuple[int, ...] = self._version.release
         return _release
 
     @property
-    def pre(self):
-        # type: () -> Optional[Tuple[str, int]]
-        _pre = self._version.pre  # type: Optional[Tuple[str, int]]
+    def pre(self) -> Optional[Tuple[str, int]]:
+        _pre: Optional[Tuple[str, int]] = self._version.pre
         return _pre
 
     @property
-    def post(self):
-        # type: () -> Optional[Tuple[str, int]]
+    def post(self) -> Optional[int]:
         return self._version.post[1] if self._version.post else None
 
     @property
-    def dev(self):
-        # type: () -> Optional[Tuple[str, int]]
+    def dev(self) -> Optional[int]:
         return self._version.dev[1] if self._version.dev else None
 
     @property
-    def local(self):
-        # type: () -> Optional[str]
+    def local(self) -> Optional[str]:
         if self._version.local:
             return ".".join(str(x) for x in self._version.local)
         else:
             return None
 
     @property
-    def public(self):
-        # type: () -> str
+    def public(self) -> str:
         return str(self).split("+", 1)[0]
 
     @property
-    def base_version(self):
-        # type: () -> str
+    def base_version(self) -> str:
         parts = []
 
         # Epoch
         if self.epoch != 0:
-            parts.append("{0}!".format(self.epoch))
+            parts.append(f"{self.epoch}!")
 
         # Release segment
         parts.append(".".join(str(x) for x in self.release))
@@ -387,41 +366,33 @@ class Version(_BaseVersion):
         return "".join(parts)
 
     @property
-    def is_prerelease(self):
-        # type: () -> bool
+    def is_prerelease(self) -> bool:
         return self.dev is not None or self.pre is not None
 
     @property
-    def is_postrelease(self):
-        # type: () -> bool
+    def is_postrelease(self) -> bool:
         return self.post is not None
 
     @property
-    def is_devrelease(self):
-        # type: () -> bool
+    def is_devrelease(self) -> bool:
         return self.dev is not None
 
     @property
-    def major(self):
-        # type: () -> int
+    def major(self) -> int:
         return self.release[0] if len(self.release) >= 1 else 0
 
     @property
-    def minor(self):
-        # type: () -> int
+    def minor(self) -> int:
         return self.release[1] if len(self.release) >= 2 else 0
 
     @property
-    def micro(self):
-        # type: () -> int
+    def micro(self) -> int:
         return self.release[2] if len(self.release) >= 3 else 0
 
 
 def _parse_letter_version(
-    letter,  # type: str
-    number,  # type: Union[str, bytes, SupportsInt]
-):
-    # type: (...) -> Optional[Tuple[str, int]]
+    letter: str, number: Union[str, bytes, SupportsInt]
+) -> Optional[Tuple[str, int]]:
 
     if letter:
         # We consider there to be an implicit 0 in a pre-release if there is
@@ -458,8 +429,7 @@ def _parse_letter_version(
 _local_version_separators = re.compile(r"[\._-]")
 
 
-def _parse_local_version(local):
-    # type: (str) -> Optional[LocalType]
+def _parse_local_version(local: str) -> Optional[LocalType]:
     """
     Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
     """
@@ -472,14 +442,13 @@ def _parse_local_version(local):
 
 
 def _cmpkey(
-    epoch,  # type: int
-    release,  # type: Tuple[int, ...]
-    pre,  # type: Optional[Tuple[str, int]]
-    post,  # type: Optional[Tuple[str, int]]
-    dev,  # type: Optional[Tuple[str, int]]
-    local,  # type: Optional[Tuple[SubLocalType]]
-):
-    # type: (...) -> CmpKey
+    epoch: int,
+    release: Tuple[int, ...],
+    pre: Optional[Tuple[str, int]],
+    post: Optional[Tuple[str, int]],
+    dev: Optional[Tuple[str, int]],
+    local: Optional[Tuple[SubLocalType]],
+) -> CmpKey:
 
     # When we compare a release version, we want to compare it with all of the
     # trailing zeros removed. So we'll use a reverse the list, drop all the now
@@ -495,7 +464,7 @@ def _cmpkey(
     # if there is not a pre or a post segment. If we have one of those then
     # the normal sorting rules will handle this case correctly.
     if pre is None and post is None and dev is not None:
-        _pre = NegativeInfinity  # type: PrePostDevType
+        _pre: PrePostDevType = NegativeInfinity
     # Versions without a pre-release (except as noted above) should sort after
     # those with one.
     elif pre is None:
@@ -505,21 +474,21 @@ def _cmpkey(
 
     # Versions without a post segment should sort before those with one.
     if post is None:
-        _post = NegativeInfinity  # type: PrePostDevType
+        _post: PrePostDevType = NegativeInfinity
 
     else:
         _post = post
 
     # Versions without a development segment should sort after those with one.
     if dev is None:
-        _dev = Infinity  # type: PrePostDevType
+        _dev: PrePostDevType = Infinity
 
     else:
         _dev = dev
 
     if local is None:
         # Versions without a local segment should sort before those with one.
-        _local = NegativeInfinity  # type: LocalType
+        _local: LocalType = NegativeInfinity
     else:
         # Versions with a local segment need that segment parsed to implement
         # the sorting rules in PEP440.
diff --git a/pkg_resources/_vendor/pyparsing.py b/pkg_resources/_vendor/pyparsing.py
index 4cae7883..cf75e1e5 100644
--- a/pkg_resources/_vendor/pyparsing.py
+++ b/pkg_resources/_vendor/pyparsing.py
@@ -1625,7 +1625,7 @@ class ParserElement(object):
            (see L{I{parseWithTabs}<parseWithTabs>})

          - define your parse action using the full C{(s,loc,toks)} signature, and

            reference the input string using the parse action's C{s} argument

-         - explicitly expand the tabs in your input string before calling

+         - explictly expand the tabs in your input string before calling

            C{parseString}

         

         Example::

diff --git a/pkg_resources/_vendor/vendored.txt b/pkg_resources/_vendor/vendored.txt
index da7a1981..444ed25b 100644
--- a/pkg_resources/_vendor/vendored.txt
+++ b/pkg_resources/_vendor/vendored.txt
@@ -1,3 +1,3 @@
-packaging==20.4
+packaging==21.2
 pyparsing==2.2.1
 appdirs==1.4.3
diff --git a/pytest.ini b/pytest.ini
index df1c2af9..395418db 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -34,6 +34,7 @@ filterwarnings=
 
 	# https://github.com/pypa/setuptools/issues/2497
 	ignore:.* is an invalid version and will not be supported::pkg_resources
+	ignore:Creating a LegacyVersion has been deprecated
 
 	# https://github.com/pypa/setuptools/pull/2865#issuecomment-965700112
 	# ideally would apply to Python 3.10+ when
diff --git a/setuptools/_vendor/packaging/__about__.py b/setuptools/_vendor/packaging/__about__.py
index 4d998578..c359122f 100644
--- a/setuptools/_vendor/packaging/__about__.py
+++ b/setuptools/_vendor/packaging/__about__.py
@@ -1,7 +1,6 @@
 # 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
 
 __all__ = [
     "__title__",
@@ -18,10 +17,10 @@ __title__ = "packaging"
 __summary__ = "Core utilities for Python packages"
 __uri__ = "https://github.com/pypa/packaging"
 
-__version__ = "20.4"
+__version__ = "21.2"
 
 __author__ = "Donald Stufft and individual contributors"
 __email__ = "donald@stufft.io"
 
 __license__ = "BSD-2-Clause or Apache-2.0"
-__copyright__ = "Copyright 2014-2019 %s" % __author__
+__copyright__ = "2014-2019 %s" % __author__
diff --git a/setuptools/_vendor/packaging/__init__.py b/setuptools/_vendor/packaging/__init__.py
index a0cf67df..3c50c5dc 100644
--- a/setuptools/_vendor/packaging/__init__.py
+++ b/setuptools/_vendor/packaging/__init__.py
@@ -1,7 +1,6 @@
 # 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
 
 from .__about__ import (
     __author__,
diff --git a/setuptools/_vendor/packaging/_compat.py b/setuptools/_vendor/packaging/_compat.py
deleted file mode 100644
index e54bd4ed..00000000
--- a/setuptools/_vendor/packaging/_compat.py
+++ /dev/null
@@ -1,38 +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 sys
-
-from ._typing import TYPE_CHECKING
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import Any, Dict, Tuple, Type
-
-
-PY2 = sys.version_info[0] == 2
-PY3 = sys.version_info[0] == 3
-
-# flake8: noqa
-
-if PY3:
-    string_types = (str,)
-else:
-    string_types = (basestring,)
-
-
-def with_metaclass(meta, *bases):
-    # type: (Type[Any], Tuple[Type[Any], ...]) -> Any
-    """
-    Create a base class with a metaclass.
-    """
-    # This requires a bit of explanation: the basic idea is to make a dummy
-    # metaclass for one level of class instantiation that replaces itself with
-    # the actual metaclass.
-    class metaclass(meta):  # type: ignore
-        def __new__(cls, name, this_bases, d):
-            # type: (Type[Any], str, Tuple[Any], Dict[Any, Any]) -> Any
-            return meta(name, bases, d)
-
-    return type.__new__(metaclass, "temporary_class", (), {})
diff --git a/setuptools/_vendor/packaging/_manylinux.py b/setuptools/_vendor/packaging/_manylinux.py
new file mode 100644
index 00000000..4c379aa6
--- /dev/null
+++ b/setuptools/_vendor/packaging/_manylinux.py
@@ -0,0 +1,301 @@
+import collections
+import functools
+import os
+import re
+import struct
+import sys
+import warnings
+from typing import IO, Dict, Iterator, NamedTuple, Optional, Tuple
+
+
+# Python does not provide platform information at sufficient granularity to
+# identify the architecture of the running executable in some cases, so we
+# determine it dynamically by reading the information from the running
+# process. This only applies on Linux, which uses the ELF format.
+class _ELFFileHeader:
+    # https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
+    class _InvalidELFFileHeader(ValueError):
+        """
+        An invalid ELF file header was found.
+        """
+
+    ELF_MAGIC_NUMBER = 0x7F454C46
+    ELFCLASS32 = 1
+    ELFCLASS64 = 2
+    ELFDATA2LSB = 1
+    ELFDATA2MSB = 2
+    EM_386 = 3
+    EM_S390 = 22
+    EM_ARM = 40
+    EM_X86_64 = 62
+    EF_ARM_ABIMASK = 0xFF000000
+    EF_ARM_ABI_VER5 = 0x05000000
+    EF_ARM_ABI_FLOAT_HARD = 0x00000400
+
+    def __init__(self, file: IO[bytes]) -> None:
+        def unpack(fmt: str) -> int:
+            try:
+                data = file.read(struct.calcsize(fmt))
+                result: Tuple[int, ...] = struct.unpack(fmt, data)
+            except struct.error:
+                raise _ELFFileHeader._InvalidELFFileHeader()
+            return result[0]
+
+        self.e_ident_magic = unpack(">I")
+        if self.e_ident_magic != self.ELF_MAGIC_NUMBER:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_class = unpack("B")
+        if self.e_ident_class not in {self.ELFCLASS32, self.ELFCLASS64}:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_data = unpack("B")
+        if self.e_ident_data not in {self.ELFDATA2LSB, self.ELFDATA2MSB}:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_version = unpack("B")
+        self.e_ident_osabi = unpack("B")
+        self.e_ident_abiversion = unpack("B")
+        self.e_ident_pad = file.read(7)
+        format_h = "<H" if self.e_ident_data == self.ELFDATA2LSB else ">H"
+        format_i = "<I" if self.e_ident_data == self.ELFDATA2LSB else ">I"
+        format_q = "<Q" if self.e_ident_data == self.ELFDATA2LSB else ">Q"
+        format_p = format_i if self.e_ident_class == self.ELFCLASS32 else format_q
+        self.e_type = unpack(format_h)
+        self.e_machine = unpack(format_h)
+        self.e_version = unpack(format_i)
+        self.e_entry = unpack(format_p)
+        self.e_phoff = unpack(format_p)
+        self.e_shoff = unpack(format_p)
+        self.e_flags = unpack(format_i)
+        self.e_ehsize = unpack(format_h)
+        self.e_phentsize = unpack(format_h)
+        self.e_phnum = unpack(format_h)
+        self.e_shentsize = unpack(format_h)
+        self.e_shnum = unpack(format_h)
+        self.e_shstrndx = unpack(format_h)
+
+
+def _get_elf_header() -> Optional[_ELFFileHeader]:
+    try:
+        with open(sys.executable, "rb") as f:
+            elf_header = _ELFFileHeader(f)
+    except (OSError, TypeError, _ELFFileHeader._InvalidELFFileHeader):
+        return None
+    return elf_header
+
+
+def _is_linux_armhf() -> bool:
+    # hard-float ABI can be detected from the ELF header of the running
+    # process
+    # https://static.docs.arm.com/ihi0044/g/aaelf32.pdf
+    elf_header = _get_elf_header()
+    if elf_header is None:
+        return False
+    result = elf_header.e_ident_class == elf_header.ELFCLASS32
+    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
+    result &= elf_header.e_machine == elf_header.EM_ARM
+    result &= (
+        elf_header.e_flags & elf_header.EF_ARM_ABIMASK
+    ) == elf_header.EF_ARM_ABI_VER5
+    result &= (
+        elf_header.e_flags & elf_header.EF_ARM_ABI_FLOAT_HARD
+    ) == elf_header.EF_ARM_ABI_FLOAT_HARD
+    return result
+
+
+def _is_linux_i686() -> bool:
+    elf_header = _get_elf_header()
+    if elf_header is None:
+        return False
+    result = elf_header.e_ident_class == elf_header.ELFCLASS32
+    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
+    result &= elf_header.e_machine == elf_header.EM_386
+    return result
+
+
+def _have_compatible_abi(arch: str) -> bool:
+    if arch == "armv7l":
+        return _is_linux_armhf()
+    if arch == "i686":
+        return _is_linux_i686()
+    return arch in {"x86_64", "aarch64", "ppc64", "ppc64le", "s390x"}
+
+
+# If glibc ever changes its major version, we need to know what the last
+# minor version was, so we can build the complete list of all versions.
+# For now, guess what the highest minor version might be, assume it will
+# be 50 for testing. Once this actually happens, update the dictionary
+# with the actual value.
+_LAST_GLIBC_MINOR: Dict[int, int] = collections.defaultdict(lambda: 50)
+
+
+class _GLibCVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+def _glibc_version_string_confstr() -> Optional[str]:
+    """
+    Primary implementation of glibc_version_string using os.confstr.
+    """
+    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
+    # to be broken or missing. This strategy is used in the standard library
+    # platform module.
+    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c/Lib/platform.py#L175-L183
+    try:
+        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17".
+        version_string = os.confstr("CS_GNU_LIBC_VERSION")
+        assert version_string is not None
+        _, version = version_string.split()
+    except (AssertionError, AttributeError, OSError, ValueError):
+        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
+        return None
+    return version
+
+
+def _glibc_version_string_ctypes() -> Optional[str]:
+    """
+    Fallback implementation of glibc_version_string using ctypes.
+    """
+    try:
+        import ctypes
+    except ImportError:
+        return None
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    #
+    # We must also handle the special case where the executable is not a
+    # dynamically linked executable. This can occur when using musl libc,
+    # for example. In this situation, dlopen() will error, leading to an
+    # OSError. Interestingly, at least in the case of musl, there is no
+    # errno set on the OSError. The single string argument used to construct
+    # OSError comes from libc itself and is therefore not portable to
+    # hard code here. In any case, failure to call dlopen() means we
+    # can proceed, so we bail on our attempt.
+    try:
+        process_namespace = ctypes.CDLL(None)
+    except OSError:
+        return None
+
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str: str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+def _glibc_version_string() -> Optional[str]:
+    """Returns glibc version string, or None if not using glibc."""
+    return _glibc_version_string_confstr() or _glibc_version_string_ctypes()
+
+
+def _parse_glibc_version(version_str: str) -> Tuple[int, int]:
+    """Parse glibc version.
+
+    We use a regexp instead of str.split because we want to discard any
+    random junk that might come after the minor version -- this might happen
+    in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    uses version strings like "2.20-2014.11"). See gh-3588.
+    """
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn(
+            "Expected glibc version with 2 components major.minor,"
+            " got: %s" % version_str,
+            RuntimeWarning,
+        )
+        return -1, -1
+    return int(m.group("major")), int(m.group("minor"))
+
+
+@functools.lru_cache()
+def _get_glibc_version() -> Tuple[int, int]:
+    version_str = _glibc_version_string()
+    if version_str is None:
+        return (-1, -1)
+    return _parse_glibc_version(version_str)
+
+
+# From PEP 513, PEP 600
+def _is_compatible(name: str, arch: str, version: _GLibCVersion) -> bool:
+    sys_glibc = _get_glibc_version()
+    if sys_glibc < version:
+        return False
+    # Check for presence of _manylinux module.
+    try:
+        import _manylinux  # noqa
+    except ImportError:
+        return True
+    if hasattr(_manylinux, "manylinux_compatible"):
+        result = _manylinux.manylinux_compatible(version[0], version[1], arch)
+        if result is not None:
+            return bool(result)
+        return True
+    if version == _GLibCVersion(2, 5):
+        if hasattr(_manylinux, "manylinux1_compatible"):
+            return bool(_manylinux.manylinux1_compatible)
+    if version == _GLibCVersion(2, 12):
+        if hasattr(_manylinux, "manylinux2010_compatible"):
+            return bool(_manylinux.manylinux2010_compatible)
+    if version == _GLibCVersion(2, 17):
+        if hasattr(_manylinux, "manylinux2014_compatible"):
+            return bool(_manylinux.manylinux2014_compatible)
+    return True
+
+
+_LEGACY_MANYLINUX_MAP = {
+    # CentOS 7 w/ glibc 2.17 (PEP 599)
+    (2, 17): "manylinux2014",
+    # CentOS 6 w/ glibc 2.12 (PEP 571)
+    (2, 12): "manylinux2010",
+    # CentOS 5 w/ glibc 2.5 (PEP 513)
+    (2, 5): "manylinux1",
+}
+
+
+def platform_tags(linux: str, arch: str) -> Iterator[str]:
+    if not _have_compatible_abi(arch):
+        return
+    # Oldest glibc to be supported regardless of architecture is (2, 17).
+    too_old_glibc2 = _GLibCVersion(2, 16)
+    if arch in {"x86_64", "i686"}:
+        # On x86/i686 also oldest glibc to be supported is (2, 5).
+        too_old_glibc2 = _GLibCVersion(2, 4)
+    current_glibc = _GLibCVersion(*_get_glibc_version())
+    glibc_max_list = [current_glibc]
+    # We can assume compatibility across glibc major versions.
+    # https://sourceware.org/bugzilla/show_bug.cgi?id=24636
+    #
+    # Build a list of maximum glibc versions so that we can
+    # output the canonical list of all glibc from current_glibc
+    # down to too_old_glibc2, including all intermediary versions.
+    for glibc_major in range(current_glibc.major - 1, 1, -1):
+        glibc_minor = _LAST_GLIBC_MINOR[glibc_major]
+        glibc_max_list.append(_GLibCVersion(glibc_major, glibc_minor))
+    for glibc_max in glibc_max_list:
+        if glibc_max.major == too_old_glibc2.major:
+            min_minor = too_old_glibc2.minor
+        else:
+            # For other glibc major versions oldest supported is (x, 0).
+            min_minor = -1
+        for glibc_minor in range(glibc_max.minor, min_minor, -1):
+            glibc_version = _GLibCVersion(glibc_max.major, glibc_minor)
+            tag = "manylinux_{}_{}".format(*glibc_version)
+            if _is_compatible(tag, arch, glibc_version):
+                yield linux.replace("linux", tag)
+            # Handle the legacy manylinux1, manylinux2010, manylinux2014 tags.
+            if glibc_version in _LEGACY_MANYLINUX_MAP:
+                legacy_tag = _LEGACY_MANYLINUX_MAP[glibc_version]
+                if _is_compatible(legacy_tag, arch, glibc_version):
+                    yield linux.replace("linux", legacy_tag)
diff --git a/setuptools/_vendor/packaging/_musllinux.py b/setuptools/_vendor/packaging/_musllinux.py
new file mode 100644
index 00000000..85450faf
--- /dev/null
+++ b/setuptools/_vendor/packaging/_musllinux.py
@@ -0,0 +1,136 @@
+"""PEP 656 support.
+
+This module implements logic to detect if the currently running Python is
+linked against musl, and what musl version is used.
+"""
+
+import contextlib
+import functools
+import operator
+import os
+import re
+import struct
+import subprocess
+import sys
+from typing import IO, Iterator, NamedTuple, Optional, Tuple
+
+
+def _read_unpacked(f: IO[bytes], fmt: str) -> Tuple[int, ...]:
+    return struct.unpack(fmt, f.read(struct.calcsize(fmt)))
+
+
+def _parse_ld_musl_from_elf(f: IO[bytes]) -> Optional[str]:
+    """Detect musl libc location by parsing the Python executable.
+
+    Based on: https://gist.github.com/lyssdod/f51579ae8d93c8657a5564aefc2ffbca
+    ELF header: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.eheader.html
+    """
+    f.seek(0)
+    try:
+        ident = _read_unpacked(f, "16B")
+    except struct.error:
+        return None
+    if ident[:4] != tuple(b"\x7fELF"):  # Invalid magic, not ELF.
+        return None
+    f.seek(struct.calcsize("HHI"), 1)  # Skip file type, machine, and version.
+
+    try:
+        # e_fmt: Format for program header.
+        # p_fmt: Format for section header.
+        # p_idx: Indexes to find p_type, p_offset, and p_filesz.
+        e_fmt, p_fmt, p_idx = {
+            1: ("IIIIHHH", "IIIIIIII", (0, 1, 4)),  # 32-bit.
+            2: ("QQQIHHH", "IIQQQQQQ", (0, 2, 5)),  # 64-bit.
+        }[ident[4]]
+    except KeyError:
+        return None
+    else:
+        p_get = operator.itemgetter(*p_idx)
+
+    # Find the interpreter section and return its content.
+    try:
+        _, e_phoff, _, _, _, e_phentsize, e_phnum = _read_unpacked(f, e_fmt)
+    except struct.error:
+        return None
+    for i in range(e_phnum + 1):
+        f.seek(e_phoff + e_phentsize * i)
+        try:
+            p_type, p_offset, p_filesz = p_get(_read_unpacked(f, p_fmt))
+        except struct.error:
+            return None
+        if p_type != 3:  # Not PT_INTERP.
+            continue
+        f.seek(p_offset)
+        interpreter = os.fsdecode(f.read(p_filesz)).strip("\0")
+        if "musl" not in interpreter:
+            return None
+        return interpreter
+    return None
+
+
+class _MuslVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+def _parse_musl_version(output: str) -> Optional[_MuslVersion]:
+    lines = [n for n in (n.strip() for n in output.splitlines()) if n]
+    if len(lines) < 2 or lines[0][:4] != "musl":
+        return None
+    m = re.match(r"Version (\d+)\.(\d+)", lines[1])
+    if not m:
+        return None
+    return _MuslVersion(major=int(m.group(1)), minor=int(m.group(2)))
+
+
+@functools.lru_cache()
+def _get_musl_version(executable: str) -> Optional[_MuslVersion]:
+    """Detect currently-running musl runtime version.
+
+    This is done by checking the specified executable's dynamic linking
+    information, and invoking the loader to parse its output for a version
+    string. If the loader is musl, the output would be something like::
+
+        musl libc (x86_64)
+        Version 1.2.2
+        Dynamic Program Loader
+    """
+    with contextlib.ExitStack() as stack:
+        try:
+            f = stack.enter_context(open(executable, "rb"))
+        except IOError:
+            return None
+        ld = _parse_ld_musl_from_elf(f)
+    if not ld:
+        return None
+    proc = subprocess.run([ld], stderr=subprocess.PIPE, universal_newlines=True)
+    return _parse_musl_version(proc.stderr)
+
+
+def platform_tags(arch: str) -> Iterator[str]:
+    """Generate musllinux tags compatible to the current platform.
+
+    :param arch: Should be the part of platform tag after the ``linux_``
+        prefix, e.g. ``x86_64``. The ``linux_`` prefix is assumed as a
+        prerequisite for the current platform to be musllinux-compatible.
+
+    :returns: An iterator of compatible musllinux tags.
+    """
+    sys_musl = _get_musl_version(sys.executable)
+    if sys_musl is None:  # Python not dynamically linked against musl.
+        return
+    for minor in range(sys_musl.minor, -1, -1):
+        yield f"musllinux_{sys_musl.major}_{minor}_{arch}"
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import sysconfig
+
+    plat = sysconfig.get_platform()
+    assert plat.startswith("linux-"), "not linux"
+
+    print("plat:", plat)
+    print("musl:", _get_musl_version(sys.executable))
+    print("tags:", end=" ")
+    for t in platform_tags(re.sub(r"[.-]", "_", plat.split("-", 1)[-1])):
+        print(t, end="\n      ")
diff --git a/setuptools/_vendor/packaging/_structures.py b/setuptools/_vendor/packaging/_structures.py
index 800d5c55..95154975 100644
--- a/setuptools/_vendor/packaging/_structures.py
+++ b/setuptools/_vendor/packaging/_structures.py
@@ -1,85 +1,66 @@
 # 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
 
 
-class InfinityType(object):
-    def __repr__(self):
-        # type: () -> str
+class InfinityType:
+    def __repr__(self) -> str:
         return "Infinity"
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(repr(self))
 
-    def __lt__(self, other):
-        # type: (object) -> bool
+    def __lt__(self, other: object) -> bool:
         return False
 
-    def __le__(self, other):
-        # type: (object) -> bool
+    def __le__(self, other: object) -> bool:
         return False
 
-    def __eq__(self, other):
-        # type: (object) -> bool
+    def __eq__(self, other: object) -> bool:
         return isinstance(other, self.__class__)
 
-    def __ne__(self, other):
-        # type: (object) -> bool
+    def __ne__(self, other: object) -> bool:
         return not isinstance(other, self.__class__)
 
-    def __gt__(self, other):
-        # type: (object) -> bool
+    def __gt__(self, other: object) -> bool:
         return True
 
-    def __ge__(self, other):
-        # type: (object) -> bool
+    def __ge__(self, other: object) -> bool:
         return True
 
-    def __neg__(self):
-        # type: (object) -> NegativeInfinityType
+    def __neg__(self: object) -> "NegativeInfinityType":
         return NegativeInfinity
 
 
 Infinity = InfinityType()
 
 
-class NegativeInfinityType(object):
-    def __repr__(self):
-        # type: () -> str
+class NegativeInfinityType:
+    def __repr__(self) -> str:
         return "-Infinity"
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(repr(self))
 
-    def __lt__(self, other):
-        # type: (object) -> bool
+    def __lt__(self, other: object) -> bool:
         return True
 
-    def __le__(self, other):
-        # type: (object) -> bool
+    def __le__(self, other: object) -> bool:
         return True
 
-    def __eq__(self, other):
-        # type: (object) -> bool
+    def __eq__(self, other: object) -> bool:
         return isinstance(other, self.__class__)
 
-    def __ne__(self, other):
-        # type: (object) -> bool
+    def __ne__(self, other: object) -> bool:
         return not isinstance(other, self.__class__)
 
-    def __gt__(self, other):
-        # type: (object) -> bool
+    def __gt__(self, other: object) -> bool:
         return False
 
-    def __ge__(self, other):
-        # type: (object) -> bool
+    def __ge__(self, other: object) -> bool:
         return False
 
-    def __neg__(self):
-        # type: (object) -> InfinityType
+    def __neg__(self: object) -> InfinityType:
         return Infinity
 
 
diff --git a/setuptools/_vendor/packaging/_typing.py b/setuptools/_vendor/packaging/_typing.py
deleted file mode 100644
index 77a8b918..00000000
--- a/setuptools/_vendor/packaging/_typing.py
+++ /dev/null
@@ -1,48 +0,0 @@
-"""For neatly implementing static typing in packaging.
-
-`mypy` - the static type analysis tool we use - uses the `typing` module, which
-provides core functionality fundamental to mypy's functioning.
-
-Generally, `typing` would be imported at runtime and used in that fashion -
-it acts as a no-op at runtime and does not have any run-time overhead by
-design.
-
-As it turns out, `typing` is not vendorable - it uses separate sources for
-Python 2/Python 3. Thus, this codebase can not expect it to be present.
-To work around this, mypy allows the typing import to be behind a False-y
-optional to prevent it from running at runtime and type-comments can be used
-to remove the need for the types to be accessible directly during runtime.
-
-This module provides the False-y guard in a nicely named fashion so that a
-curious maintainer can reach here to read this.
-
-In packaging, all static-typing related imports should be guarded as follows:
-
-    from packaging._typing import TYPE_CHECKING
-
-    if TYPE_CHECKING:
-        from typing import ...
-
-Ref: https://github.com/python/mypy/issues/3216
-"""
-
-__all__ = ["TYPE_CHECKING", "cast"]
-
-# The TYPE_CHECKING constant defined by the typing module is False at runtime
-# but True while type checking.
-if False:  # pragma: no cover
-    from typing import TYPE_CHECKING
-else:
-    TYPE_CHECKING = False
-
-# typing's cast syntax requires calling typing.cast at runtime, but we don't
-# want to import typing at runtime. Here, we inform the type checkers that
-# we're importing `typing.cast` as `cast` and re-implement typing.cast's
-# runtime behavior in a block that is ignored by type checkers.
-if TYPE_CHECKING:  # pragma: no cover
-    # not executed at runtime
-    from typing import cast
-else:
-    # executed at runtime
-    def cast(type_, value):  # noqa
-        return value
diff --git a/setuptools/_vendor/packaging/markers.py b/setuptools/_vendor/packaging/markers.py
index 03fbdfcc..eb0541b8 100644
--- a/setuptools/_vendor/packaging/markers.py
+++ b/setuptools/_vendor/packaging/markers.py
@@ -1,26 +1,26 @@
 # 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 typing import Any, Callable, Dict, List, Optional, Tuple, Union
+
+from setuptools.extern.pyparsing import (  # noqa: N817
+    Forward,
+    Group,
+    Literal as L,
+    ParseException,
+    ParseResults,
+    QuotedString,
+    ZeroOrMore,
+    stringEnd,
+    stringStart,
+)
 
-from setuptools.extern.pyparsing import ParseException, ParseResults, stringStart, stringEnd
-from setuptools.extern.pyparsing import ZeroOrMore, Group, Forward, QuotedString
-from setuptools.extern.pyparsing import Literal as L  # noqa
-
-from ._compat import string_types
-from ._typing import TYPE_CHECKING
-from .specifiers import Specifier, InvalidSpecifier
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import Any, Callable, Dict, List, Optional, Tuple, Union
-
-    Operator = Callable[[str, str], bool]
-
+from .specifiers import InvalidSpecifier, Specifier
 
 __all__ = [
     "InvalidMarker",
@@ -30,6 +30,8 @@ __all__ = [
     "default_environment",
 ]
 
+Operator = Callable[[str, str], bool]
+
 
 class InvalidMarker(ValueError):
     """
@@ -50,39 +52,32 @@ class UndefinedEnvironmentName(ValueError):
     """
 
 
-class Node(object):
-    def __init__(self, value):
-        # type: (Any) -> None
+class Node:
+    def __init__(self, value: Any) -> None:
         self.value = value
 
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         return str(self.value)
 
-    def __repr__(self):
-        # type: () -> str
-        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__}('{self}')>"
 
-    def serialize(self):
-        # type: () -> str
+    def serialize(self) -> str:
         raise NotImplementedError
 
 
 class Variable(Node):
-    def serialize(self):
-        # type: () -> str
+    def serialize(self) -> str:
         return str(self)
 
 
 class Value(Node):
-    def serialize(self):
-        # type: () -> str
-        return '"{0}"'.format(self)
+    def serialize(self) -> str:
+        return f'"{self}"'
 
 
 class Op(Node):
-    def serialize(self):
-        # type: () -> str
+    def serialize(self) -> str:
         return str(self)
 
 
@@ -143,18 +138,18 @@ 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]
+def _coerce_parse_result(results: 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
+def _format_marker(
+    marker: Union[List[str], Tuple[Node, ...], str], first: Optional[bool] = True
+) -> str:
 
-    assert isinstance(marker, (list, tuple, string_types))
+    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
@@ -179,7 +174,7 @@ def _format_marker(marker, first=True):
         return marker
 
 
-_operators = {
+_operators: Dict[str, Operator] = {
     "in": lambda lhs, rhs: lhs in rhs,
     "not in": lambda lhs, rhs: lhs not in rhs,
     "<": operator.lt,
@@ -188,11 +183,10 @@ _operators = {
     "!=": operator.ne,
     ">=": operator.ge,
     ">": operator.gt,
-}  # type: Dict[str, Operator]
+}
 
 
-def _eval_op(lhs, op, rhs):
-    # type: (str, Op, str) -> bool
+def _eval_op(lhs: str, op: Op, rhs: str) -> bool:
     try:
         spec = Specifier("".join([op.serialize(), rhs]))
     except InvalidSpecifier:
@@ -200,40 +194,36 @@ def _eval_op(lhs, op, rhs):
     else:
         return spec.contains(lhs)
 
-    oper = _operators.get(op.serialize())  # type: Optional[Operator]
+    oper: Optional[Operator] = _operators.get(op.serialize())
     if oper is None:
-        raise UndefinedComparison(
-            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
-        )
+        raise UndefinedComparison(f"Undefined {op!r} on {lhs!r} and {rhs!r}.")
 
     return oper(lhs, rhs)
 
 
-class Undefined(object):
+class Undefined:
     pass
 
 
 _undefined = Undefined()
 
 
-def _get_env(environment, name):
-    # type: (Dict[str, str], str) -> str
-    value = environment.get(name, _undefined)  # type: Union[str, Undefined]
+def _get_env(environment: Dict[str, str], name: str) -> str:
+    value: Union[str, Undefined] = environment.get(name, _undefined)
 
     if isinstance(value, Undefined):
         raise UndefinedEnvironmentName(
-            "{0!r} does not exist in evaluation environment.".format(name)
+            f"{name!r} does not exist in evaluation environment."
         )
 
     return value
 
 
-def _evaluate_markers(markers, environment):
-    # type: (List[Any], Dict[str, str]) -> bool
-    groups = [[]]  # type: List[List[bool]]
+def _evaluate_markers(markers: List[Any], environment: Dict[str, str]) -> bool:
+    groups: List[List[bool]] = [[]]
 
     for marker in markers:
-        assert isinstance(marker, (list, tuple, string_types))
+        assert isinstance(marker, (list, tuple, str))
 
         if isinstance(marker, list):
             groups[-1].append(_evaluate_markers(marker, environment))
@@ -256,8 +246,7 @@ def _evaluate_markers(markers, environment):
     return any(all(item) for item in groups)
 
 
-def format_full_version(info):
-    # type: (sys._version_info) -> str
+def format_full_version(info: "sys._version_info") -> str:
     version = "{0.major}.{0.minor}.{0.micro}".format(info)
     kind = info.releaselevel
     if kind != "final":
@@ -265,18 +254,9 @@ def format_full_version(info):
     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 = ""
-
+def default_environment() -> Dict[str, str]:
+    iver = format_full_version(sys.implementation.version)
+    implementation_name = sys.implementation.name
     return {
         "implementation_name": implementation_name,
         "implementation_version": iver,
@@ -292,27 +272,23 @@ def default_environment():
     }
 
 
-class Marker(object):
-    def __init__(self, marker):
-        # type: (str) -> None
+class Marker:
+    def __init__(self, marker: 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(
+                f"Invalid marker: {marker!r}, parse error at "
+                f"{marker[e.loc : e.loc + 8]!r}"
             )
-            raise InvalidMarker(err_str)
 
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         return _format_marker(self._markers)
 
-    def __repr__(self):
-        # type: () -> str
-        return "<Marker({0!r})>".format(str(self))
+    def __repr__(self) -> str:
+        return f"<Marker('{self}')>"
 
-    def evaluate(self, environment=None):
-        # type: (Optional[Dict[str, str]]) -> bool
+    def evaluate(self, environment: Optional[Dict[str, str]] = None) -> bool:
         """Evaluate a marker.
 
         Return the boolean from evaluating the given marker against the
diff --git a/setuptools/_vendor/packaging/requirements.py b/setuptools/_vendor/packaging/requirements.py
index 5d50c7d7..0d93231b 100644
--- a/setuptools/_vendor/packaging/requirements.py
+++ b/setuptools/_vendor/packaging/requirements.py
@@ -1,23 +1,28 @@
 # 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 string
 import re
+import string
+import urllib.parse
+from typing import List, Optional as TOptional, Set
+
+from setuptools.extern.pyparsing import (  # noqa
+    Combine,
+    Literal as L,
+    Optional,
+    ParseException,
+    Regex,
+    Word,
+    ZeroOrMore,
+    originalTextFor,
+    stringEnd,
+    stringStart,
+)
 
-from setuptools.extern.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
-from setuptools.extern.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
-from setuptools.extern.pyparsing import Literal as L  # noqa
-from urllib import parse as urlparse
-
-from ._typing import TYPE_CHECKING
 from .markers import MARKER_EXPR, Marker
 from .specifiers import LegacySpecifier, Specifier, SpecifierSet
 
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import List
-
 
 class InvalidRequirement(ValueError):
     """
@@ -55,7 +60,7 @@ VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
 VERSION_MANY = Combine(
     VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE), joinString=",", adjacent=False
 )("_raw_spec")
-_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC = Optional((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY)
 _VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or "")
 
 VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
@@ -79,7 +84,7 @@ REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
 REQUIREMENT.parseString("x[]")
 
 
-class Requirement(object):
+class Requirement:
     """Parse a requirement.
 
     Parse a given requirement string into its parts, such as name, specifier,
@@ -92,54 +97,50 @@ class Requirement(object):
     #       the thing as well as the version? What about the markers?
     # TODO: Can we normalize the name and extra name?
 
-    def __init__(self, requirement_string):
-        # type: (str) -> None
+    def __init__(self, requirement_string: str) -> None:
         try:
             req = REQUIREMENT.parseString(requirement_string)
         except ParseException as e:
             raise InvalidRequirement(
-                'Parse error at "{0!r}": {1}'.format(
-                    requirement_string[e.loc : e.loc + 8], e.msg
-                )
+                f'Parse error at "{ requirement_string[e.loc : e.loc + 8]!r}": {e.msg}'
             )
 
-        self.name = req.name
+        self.name: str = req.name
         if req.url:
-            parsed_url = urlparse.urlparse(req.url)
+            parsed_url = urllib.parse.urlparse(req.url)
             if parsed_url.scheme == "file":
-                if urlparse.urlunparse(parsed_url) != req.url:
+                if urllib.parse.urlunparse(parsed_url) != req.url:
                     raise InvalidRequirement("Invalid URL given")
             elif not (parsed_url.scheme and parsed_url.netloc) or (
                 not parsed_url.scheme and not parsed_url.netloc
             ):
-                raise InvalidRequirement("Invalid URL: {0}".format(req.url))
-            self.url = req.url
+                raise InvalidRequirement(f"Invalid URL: {req.url}")
+            self.url: TOptional[str] = req.url
         else:
             self.url = None
-        self.extras = set(req.extras.asList() if req.extras else [])
-        self.specifier = SpecifierSet(req.specifier)
-        self.marker = req.marker if req.marker else None
+        self.extras: Set[str] = set(req.extras.asList() if req.extras else [])
+        self.specifier: SpecifierSet = SpecifierSet(req.specifier)
+        self.marker: TOptional[Marker] = req.marker if req.marker else None
 
-    def __str__(self):
-        # type: () -> str
-        parts = [self.name]  # type: List[str]
+    def __str__(self) -> str:
+        parts: List[str] = [self.name]
 
         if self.extras:
-            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+            formatted_extras = ",".join(sorted(self.extras))
+            parts.append(f"[{formatted_extras}]")
 
         if self.specifier:
             parts.append(str(self.specifier))
 
         if self.url:
-            parts.append("@ {0}".format(self.url))
+            parts.append(f"@ {self.url}")
             if self.marker:
                 parts.append(" ")
 
         if self.marker:
-            parts.append("; {0}".format(self.marker))
+            parts.append(f"; {self.marker}")
 
         return "".join(parts)
 
-    def __repr__(self):
-        # type: () -> str
-        return "<Requirement({0!r})>".format(str(self))
+    def __repr__(self) -> str:
+        return f"<Requirement('{self}')>"
diff --git a/setuptools/_vendor/packaging/specifiers.py b/setuptools/_vendor/packaging/specifiers.py
index fe09bb1d..ce66bd4a 100644
--- a/setuptools/_vendor/packaging/specifiers.py
+++ b/setuptools/_vendor/packaging/specifiers.py
@@ -1,34 +1,33 @@
 # 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 abc
 import functools
 import itertools
 import re
+import warnings
+from typing import (
+    Callable,
+    Dict,
+    Iterable,
+    Iterator,
+    List,
+    Optional,
+    Pattern,
+    Set,
+    Tuple,
+    TypeVar,
+    Union,
+)
 
-from ._compat import string_types, with_metaclass
-from ._typing import TYPE_CHECKING
 from .utils import canonicalize_version
-from .version import Version, LegacyVersion, parse
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import (
-        List,
-        Dict,
-        Union,
-        Iterable,
-        Iterator,
-        Optional,
-        Callable,
-        Tuple,
-        FrozenSet,
-    )
+from .version import LegacyVersion, Version, parse
 
-    ParsedVersion = Union[Version, LegacyVersion]
-    UnparsedVersion = Union[Version, LegacyVersion, str]
-    CallableOperator = Callable[[ParsedVersion, str], bool]
+ParsedVersion = Union[Version, LegacyVersion]
+UnparsedVersion = Union[Version, LegacyVersion, str]
+VersionTypeVar = TypeVar("VersionTypeVar", bound=UnparsedVersion)
+CallableOperator = Callable[[ParsedVersion, str], bool]
 
 
 class InvalidSpecifier(ValueError):
@@ -37,64 +36,58 @@ class InvalidSpecifier(ValueError):
     """
 
 
-class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):  # type: ignore
+class BaseSpecifier(metaclass=abc.ABCMeta):
     @abc.abstractmethod
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         """
         Returns the str representation of this Specifier like object. This
         should be representative of the Specifier itself.
         """
 
     @abc.abstractmethod
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         """
         Returns a hash value for this Specifier like object.
         """
 
     @abc.abstractmethod
-    def __eq__(self, other):
-        # type: (object) -> bool
+    def __eq__(self, other: object) -> bool:
         """
         Returns a boolean representing whether or not the two Specifier like
         objects are equal.
         """
 
     @abc.abstractmethod
-    def __ne__(self, other):
-        # type: (object) -> bool
+    def __ne__(self, other: object) -> bool:
         """
         Returns a boolean representing whether or not the two Specifier like
         objects are not equal.
         """
 
     @abc.abstractproperty
-    def prereleases(self):
-        # type: () -> Optional[bool]
+    def prereleases(self) -> Optional[bool]:
         """
         Returns whether or not pre-releases as a whole are allowed by this
         specifier.
         """
 
     @prereleases.setter
-    def prereleases(self, value):
-        # type: (bool) -> None
+    def prereleases(self, value: bool) -> None:
         """
         Sets whether or not pre-releases as a whole are allowed by this
         specifier.
         """
 
     @abc.abstractmethod
-    def contains(self, item, prereleases=None):
-        # type: (str, Optional[bool]) -> bool
+    def contains(self, item: str, prereleases: Optional[bool] = None) -> bool:
         """
         Determines if the given item is contained within this specifier.
         """
 
     @abc.abstractmethod
-    def filter(self, iterable, prereleases=None):
-        # type: (Iterable[UnparsedVersion], Optional[bool]) -> Iterable[UnparsedVersion]
+    def filter(
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
         """
         Takes an iterable of items and filters them so that only items which
         are contained within this specifier are allowed in it.
@@ -103,48 +96,43 @@ class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):  # type: ignore
 
 class _IndividualSpecifier(BaseSpecifier):
 
-    _operators = {}  # type: Dict[str, str]
+    _operators: Dict[str, str] = {}
+    _regex: Pattern[str]
 
-    def __init__(self, spec="", prereleases=None):
-        # type: (str, Optional[bool]) -> None
+    def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
         match = self._regex.search(spec)
         if not match:
-            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+            raise InvalidSpecifier(f"Invalid specifier: '{spec}'")
 
-        self._spec = (
+        self._spec: Tuple[str, str] = (
             match.group("operator").strip(),
             match.group("version").strip(),
-        )  # type: Tuple[str, str]
+        )
 
         # Store whether or not this Specifier should accept prereleases
         self._prereleases = prereleases
 
-    def __repr__(self):
-        # type: () -> str
+    def __repr__(self) -> str:
         pre = (
-            ", prereleases={0!r}".format(self.prereleases)
+            f", prereleases={self.prereleases!r}"
             if self._prereleases is not None
             else ""
         )
 
-        return "<{0}({1!r}{2})>".format(self.__class__.__name__, str(self), pre)
+        return "<{}({!r}{})>".format(self.__class__.__name__, str(self), pre)
 
-    def __str__(self):
-        # type: () -> str
-        return "{0}{1}".format(*self._spec)
+    def __str__(self) -> str:
+        return "{}{}".format(*self._spec)
 
     @property
-    def _canonical_spec(self):
-        # type: () -> Tuple[str, Union[Version, str]]
+    def _canonical_spec(self) -> Tuple[str, str]:
         return self._spec[0], canonicalize_version(self._spec[1])
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(self._canonical_spec)
 
-    def __eq__(self, other):
-        # type: (object) -> bool
-        if isinstance(other, string_types):
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, str):
             try:
                 other = self.__class__(str(other))
             except InvalidSpecifier:
@@ -154,9 +142,8 @@ class _IndividualSpecifier(BaseSpecifier):
 
         return self._canonical_spec == other._canonical_spec
 
-    def __ne__(self, other):
-        # type: (object) -> bool
-        if isinstance(other, string_types):
+    def __ne__(self, other: object) -> bool:
+        if isinstance(other, str):
             try:
                 other = self.__class__(str(other))
             except InvalidSpecifier:
@@ -166,45 +153,39 @@ class _IndividualSpecifier(BaseSpecifier):
 
         return self._spec != other._spec
 
-    def _get_operator(self, op):
-        # type: (str) -> CallableOperator
-        operator_callable = getattr(
-            self, "_compare_{0}".format(self._operators[op])
-        )  # type: CallableOperator
+    def _get_operator(self, op: str) -> CallableOperator:
+        operator_callable: CallableOperator = getattr(
+            self, f"_compare_{self._operators[op]}"
+        )
         return operator_callable
 
-    def _coerce_version(self, version):
-        # type: (UnparsedVersion) -> ParsedVersion
+    def _coerce_version(self, version: UnparsedVersion) -> ParsedVersion:
         if not isinstance(version, (LegacyVersion, Version)):
             version = parse(version)
         return version
 
     @property
-    def operator(self):
-        # type: () -> str
+    def operator(self) -> str:
         return self._spec[0]
 
     @property
-    def version(self):
-        # type: () -> str
+    def version(self) -> str:
         return self._spec[1]
 
     @property
-    def prereleases(self):
-        # type: () -> Optional[bool]
+    def prereleases(self) -> Optional[bool]:
         return self._prereleases
 
     @prereleases.setter
-    def prereleases(self, value):
-        # type: (bool) -> None
+    def prereleases(self, value: bool) -> None:
         self._prereleases = value
 
-    def __contains__(self, item):
-        # type: (str) -> bool
+    def __contains__(self, item: str) -> bool:
         return self.contains(item)
 
-    def contains(self, item, prereleases=None):
-        # type: (UnparsedVersion, Optional[bool]) -> bool
+    def contains(
+        self, item: UnparsedVersion, prereleases: Optional[bool] = None
+    ) -> bool:
 
         # Determine if prereleases are to be allowed or not.
         if prereleases is None:
@@ -222,11 +203,12 @@ class _IndividualSpecifier(BaseSpecifier):
 
         # Actually do the comparison to determine if this item is contained
         # within this Specifier or not.
-        operator_callable = self._get_operator(self.operator)  # type: CallableOperator
+        operator_callable: CallableOperator = self._get_operator(self.operator)
         return operator_callable(normalized_item, self.version)
 
-    def filter(self, iterable, prereleases=None):
-        # type: (Iterable[UnparsedVersion], Optional[bool]) -> Iterable[UnparsedVersion]
+    def filter(
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
 
         yielded = False
         found_prereleases = []
@@ -240,7 +222,7 @@ class _IndividualSpecifier(BaseSpecifier):
 
             if self.contains(parsed_version, **kw):
                 # If our version is a prerelease, and we were not set to allow
-                # prereleases, then we'll store it for later incase nothing
+                # prereleases, then we'll store it for later in case nothing
                 # else matches this specifier.
                 if parsed_version.is_prerelease and not (
                     prereleases or self.prereleases
@@ -285,44 +267,46 @@ class LegacySpecifier(_IndividualSpecifier):
         ">": "greater_than",
     }
 
-    def _coerce_version(self, version):
-        # type: (Union[ParsedVersion, str]) -> LegacyVersion
+    def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
+        super().__init__(spec, prereleases)
+
+        warnings.warn(
+            "Creating a LegacyVersion has been deprecated and will be "
+            "removed in the next major release",
+            DeprecationWarning,
+        )
+
+    def _coerce_version(self, version: UnparsedVersion) -> LegacyVersion:
         if not isinstance(version, LegacyVersion):
             version = LegacyVersion(str(version))
         return version
 
-    def _compare_equal(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_equal(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective == self._coerce_version(spec)
 
-    def _compare_not_equal(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_not_equal(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective != self._coerce_version(spec)
 
-    def _compare_less_than_equal(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_less_than_equal(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective <= self._coerce_version(spec)
 
-    def _compare_greater_than_equal(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_greater_than_equal(
+        self, prospective: LegacyVersion, spec: str
+    ) -> bool:
         return prospective >= self._coerce_version(spec)
 
-    def _compare_less_than(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_less_than(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective < self._coerce_version(spec)
 
-    def _compare_greater_than(self, prospective, spec):
-        # type: (LegacyVersion, str) -> bool
+    def _compare_greater_than(self, prospective: LegacyVersion, spec: str) -> bool:
         return prospective > self._coerce_version(spec)
 
 
 def _require_version_compare(
-    fn  # type: (Callable[[Specifier, ParsedVersion, str], bool])
-):
-    # type: (...) -> Callable[[Specifier, ParsedVersion, str], bool]
+    fn: Callable[["Specifier", ParsedVersion, str], bool]
+) -> Callable[["Specifier", ParsedVersion, str], bool]:
     @functools.wraps(fn)
-    def wrapped(self, prospective, spec):
-        # type: (Specifier, ParsedVersion, str) -> bool
+    def wrapped(self: "Specifier", prospective: ParsedVersion, spec: str) -> bool:
         if not isinstance(prospective, Version):
             return False
         return fn(self, prospective, spec)
@@ -439,8 +423,7 @@ class Specifier(_IndividualSpecifier):
     }
 
     @_require_version_compare
-    def _compare_compatible(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_compatible(self, prospective: ParsedVersion, spec: str) -> bool:
 
         # Compatible releases have an equivalent combination of >= and ==. That
         # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
@@ -449,15 +432,9 @@ class Specifier(_IndividualSpecifier):
         # the other specifiers.
 
         # We want everything but the last item in the version, but we want to
-        # ignore post and dev releases and we want to treat the pre-release as
-        # it's own separate segment.
+        # ignore suffix segments.
         prefix = ".".join(
-            list(
-                itertools.takewhile(
-                    lambda x: (not x.startswith("post") and not x.startswith("dev")),
-                    _version_split(spec),
-                )
-            )[:-1]
+            list(itertools.takewhile(_is_not_suffix, _version_split(spec)))[:-1]
         )
 
         # Add the prefix notation to the end of our string
@@ -468,8 +445,7 @@ class Specifier(_IndividualSpecifier):
         )
 
     @_require_version_compare
-    def _compare_equal(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_equal(self, prospective: ParsedVersion, spec: str) -> bool:
 
         # We need special logic to handle prefix matching
         if spec.endswith(".*"):
@@ -509,13 +485,11 @@ class Specifier(_IndividualSpecifier):
             return prospective == spec_version
 
     @_require_version_compare
-    def _compare_not_equal(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_not_equal(self, prospective: ParsedVersion, spec: str) -> bool:
         return not self._compare_equal(prospective, spec)
 
     @_require_version_compare
-    def _compare_less_than_equal(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_less_than_equal(self, prospective: ParsedVersion, spec: str) -> bool:
 
         # NB: Local version identifiers are NOT permitted in the version
         # specifier, so local version labels can be universally removed from
@@ -523,8 +497,9 @@ class Specifier(_IndividualSpecifier):
         return Version(prospective.public) <= Version(spec)
 
     @_require_version_compare
-    def _compare_greater_than_equal(self, prospective, spec):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_greater_than_equal(
+        self, prospective: ParsedVersion, spec: str
+    ) -> bool:
 
         # NB: Local version identifiers are NOT permitted in the version
         # specifier, so local version labels can be universally removed from
@@ -532,8 +507,7 @@ class Specifier(_IndividualSpecifier):
         return Version(prospective.public) >= Version(spec)
 
     @_require_version_compare
-    def _compare_less_than(self, prospective, spec_str):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_less_than(self, prospective: ParsedVersion, spec_str: str) -> bool:
 
         # Convert our spec to a Version instance, since we'll want to work with
         # it as a version.
@@ -559,8 +533,7 @@ class Specifier(_IndividualSpecifier):
         return True
 
     @_require_version_compare
-    def _compare_greater_than(self, prospective, spec_str):
-        # type: (ParsedVersion, str) -> bool
+    def _compare_greater_than(self, prospective: ParsedVersion, spec_str: str) -> bool:
 
         # Convert our spec to a Version instance, since we'll want to work with
         # it as a version.
@@ -591,13 +564,11 @@ class Specifier(_IndividualSpecifier):
         # same version in the spec.
         return True
 
-    def _compare_arbitrary(self, prospective, spec):
-        # type: (Version, str) -> bool
+    def _compare_arbitrary(self, prospective: Version, spec: str) -> bool:
         return str(prospective).lower() == str(spec).lower()
 
     @property
-    def prereleases(self):
-        # type: () -> bool
+    def prereleases(self) -> bool:
 
         # If there is an explicit prereleases set for this, then we'll just
         # blindly use that.
@@ -622,17 +593,15 @@ class Specifier(_IndividualSpecifier):
         return False
 
     @prereleases.setter
-    def prereleases(self, value):
-        # type: (bool) -> None
+    def prereleases(self, value: bool) -> None:
         self._prereleases = value
 
 
 _prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
 
 
-def _version_split(version):
-    # type: (str) -> List[str]
-    result = []  # type: List[str]
+def _version_split(version: str) -> List[str]:
+    result: List[str] = []
     for item in version.split("."):
         match = _prefix_regex.search(item)
         if match:
@@ -642,8 +611,13 @@ def _version_split(version):
     return result
 
 
-def _pad_version(left, right):
-    # type: (List[str], List[str]) -> Tuple[List[str], List[str]]
+def _is_not_suffix(segment: str) -> bool:
+    return not any(
+        segment.startswith(prefix) for prefix in ("dev", "a", "b", "rc", "post")
+    )
+
+
+def _pad_version(left: List[str], right: List[str]) -> Tuple[List[str], List[str]]:
     left_split, right_split = [], []
 
     # Get the release segment of our versions
@@ -662,8 +636,9 @@ def _pad_version(left, right):
 
 
 class SpecifierSet(BaseSpecifier):
-    def __init__(self, specifiers="", prereleases=None):
-        # type: (str, Optional[bool]) -> None
+    def __init__(
+        self, specifiers: str = "", prereleases: Optional[bool] = None
+    ) -> None:
 
         # Split on , to break each individual specifier into it's own item, and
         # strip each item to remove leading/trailing whitespace.
@@ -671,7 +646,7 @@ class SpecifierSet(BaseSpecifier):
 
         # Parsed each individual specifier, attempting first to make it a
         # Specifier and falling back to a LegacySpecifier.
-        parsed = set()
+        parsed: Set[_IndividualSpecifier] = set()
         for specifier in split_specifiers:
             try:
                 parsed.add(Specifier(specifier))
@@ -685,27 +660,23 @@ class SpecifierSet(BaseSpecifier):
         # we accept prereleases or not.
         self._prereleases = prereleases
 
-    def __repr__(self):
-        # type: () -> str
+    def __repr__(self) -> str:
         pre = (
-            ", prereleases={0!r}".format(self.prereleases)
+            f", prereleases={self.prereleases!r}"
             if self._prereleases is not None
             else ""
         )
 
-        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+        return "<SpecifierSet({!r}{})>".format(str(self), pre)
 
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         return ",".join(sorted(str(s) for s in self._specs))
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(self._specs)
 
-    def __and__(self, other):
-        # type: (Union[SpecifierSet, str]) -> SpecifierSet
-        if isinstance(other, string_types):
+    def __and__(self, other: Union["SpecifierSet", str]) -> "SpecifierSet":
+        if isinstance(other, str):
             other = SpecifierSet(other)
         elif not isinstance(other, SpecifierSet):
             return NotImplemented
@@ -727,35 +698,30 @@ class SpecifierSet(BaseSpecifier):
 
         return specifier
 
-    def __eq__(self, other):
-        # type: (object) -> bool
-        if isinstance(other, (string_types, _IndividualSpecifier)):
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, (str, _IndividualSpecifier)):
             other = SpecifierSet(str(other))
         elif not isinstance(other, SpecifierSet):
             return NotImplemented
 
         return self._specs == other._specs
 
-    def __ne__(self, other):
-        # type: (object) -> bool
-        if isinstance(other, (string_types, _IndividualSpecifier)):
+    def __ne__(self, other: object) -> bool:
+        if isinstance(other, (str, _IndividualSpecifier)):
             other = SpecifierSet(str(other))
         elif not isinstance(other, SpecifierSet):
             return NotImplemented
 
         return self._specs != other._specs
 
-    def __len__(self):
-        # type: () -> int
+    def __len__(self) -> int:
         return len(self._specs)
 
-    def __iter__(self):
-        # type: () -> Iterator[FrozenSet[_IndividualSpecifier]]
+    def __iter__(self) -> Iterator[_IndividualSpecifier]:
         return iter(self._specs)
 
     @property
-    def prereleases(self):
-        # type: () -> Optional[bool]
+    def prereleases(self) -> Optional[bool]:
 
         # If we have been given an explicit prerelease modifier, then we'll
         # pass that through here.
@@ -773,16 +739,15 @@ class SpecifierSet(BaseSpecifier):
         return any(s.prereleases for s in self._specs)
 
     @prereleases.setter
-    def prereleases(self, value):
-        # type: (bool) -> None
+    def prereleases(self, value: bool) -> None:
         self._prereleases = value
 
-    def __contains__(self, item):
-        # type: (Union[ParsedVersion, str]) -> bool
+    def __contains__(self, item: UnparsedVersion) -> bool:
         return self.contains(item)
 
-    def contains(self, item, prereleases=None):
-        # type: (Union[ParsedVersion, str], Optional[bool]) -> bool
+    def contains(
+        self, item: UnparsedVersion, prereleases: Optional[bool] = None
+    ) -> bool:
 
         # Ensure that our item is a Version or LegacyVersion instance.
         if not isinstance(item, (LegacyVersion, Version)):
@@ -810,11 +775,8 @@ class SpecifierSet(BaseSpecifier):
         return all(s.contains(item, prereleases=prereleases) for s in self._specs)
 
     def filter(
-        self,
-        iterable,  # type: Iterable[Union[ParsedVersion, str]]
-        prereleases=None,  # type: Optional[bool]
-    ):
-        # type: (...) -> Iterable[Union[ParsedVersion, str]]
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
 
         # Determine if we're forcing a prerelease or not, if we're not forcing
         # one for this particular filter call, then we'll use whatever the
@@ -833,8 +795,11 @@ class SpecifierSet(BaseSpecifier):
         # which will filter out any pre-releases, unless there are no final
         # releases, and which will filter out LegacyVersion in general.
         else:
-            filtered = []  # type: List[Union[ParsedVersion, str]]
-            found_prereleases = []  # type: List[Union[ParsedVersion, str]]
+            filtered: List[VersionTypeVar] = []
+            found_prereleases: List[VersionTypeVar] = []
+
+            item: UnparsedVersion
+            parsed_version: Union[Version, LegacyVersion]
 
             for item in iterable:
                 # Ensure that we some kind of Version class for this item.
diff --git a/setuptools/_vendor/packaging/tags.py b/setuptools/_vendor/packaging/tags.py
index 9064910b..e65890a9 100644
--- a/setuptools/_vendor/packaging/tags.py
+++ b/setuptools/_vendor/packaging/tags.py
@@ -2,62 +2,44 @@
 # 2.0, and the BSD License. See the LICENSE file in the root of this repository
 # for complete details.
 
-from __future__ import absolute_import
-
-import distutils.util
-
-try:
-    from importlib.machinery import EXTENSION_SUFFIXES
-except ImportError:  # pragma: no cover
-    import imp
-
-    EXTENSION_SUFFIXES = [x[0] for x in imp.get_suffixes()]
-    del imp
 import logging
-import os
 import platform
-import re
-import struct
 import sys
 import sysconfig
-import warnings
-
-from ._typing import TYPE_CHECKING, cast
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import (
-        Dict,
-        FrozenSet,
-        IO,
-        Iterable,
-        Iterator,
-        List,
-        Optional,
-        Sequence,
-        Tuple,
-        Union,
-    )
-
-    PythonVersion = Sequence[int]
-    MacVersion = Tuple[int, int]
-    GlibcVersion = Tuple[int, int]
-
+from importlib.machinery import EXTENSION_SUFFIXES
+from typing import (
+    Dict,
+    FrozenSet,
+    Iterable,
+    Iterator,
+    List,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+    cast,
+)
+
+from . import _manylinux, _musllinux
 
 logger = logging.getLogger(__name__)
 
-INTERPRETER_SHORT_NAMES = {
+PythonVersion = Sequence[int]
+MacVersion = Tuple[int, int]
+
+INTERPRETER_SHORT_NAMES: Dict[str, str] = {
     "python": "py",  # Generic.
     "cpython": "cp",
     "pypy": "pp",
     "ironpython": "ip",
     "jython": "jy",
-}  # type: Dict[str, str]
+}
 
 
 _32_BIT_INTERPRETER = sys.maxsize <= 2 ** 32
 
 
-class Tag(object):
+class Tag:
     """
     A representation of the tag triple for a wheel.
 
@@ -65,55 +47,53 @@ class Tag(object):
     is also supported.
     """
 
-    __slots__ = ["_interpreter", "_abi", "_platform"]
+    __slots__ = ["_interpreter", "_abi", "_platform", "_hash"]
 
-    def __init__(self, interpreter, abi, platform):
-        # type: (str, str, str) -> None
+    def __init__(self, interpreter: str, abi: str, platform: str) -> None:
         self._interpreter = interpreter.lower()
         self._abi = abi.lower()
         self._platform = platform.lower()
+        # The __hash__ of every single element in a Set[Tag] will be evaluated each time
+        # that a set calls its `.disjoint()` method, which may be called hundreds of
+        # times when scanning a page of links for packages with tags matching that
+        # Set[Tag]. Pre-computing the value here produces significant speedups for
+        # downstream consumers.
+        self._hash = hash((self._interpreter, self._abi, self._platform))
 
     @property
-    def interpreter(self):
-        # type: () -> str
+    def interpreter(self) -> str:
         return self._interpreter
 
     @property
-    def abi(self):
-        # type: () -> str
+    def abi(self) -> str:
         return self._abi
 
     @property
-    def platform(self):
-        # type: () -> str
+    def platform(self) -> str:
         return self._platform
 
-    def __eq__(self, other):
-        # type: (object) -> bool
+    def __eq__(self, other: object) -> bool:
         if not isinstance(other, Tag):
             return NotImplemented
 
         return (
-            (self.platform == other.platform)
-            and (self.abi == other.abi)
-            and (self.interpreter == other.interpreter)
+            (self._hash == other._hash)  # Short-circuit ASAP for perf reasons.
+            and (self._platform == other._platform)
+            and (self._abi == other._abi)
+            and (self._interpreter == other._interpreter)
         )
 
-    def __hash__(self):
-        # type: () -> int
-        return hash((self._interpreter, self._abi, self._platform))
+    def __hash__(self) -> int:
+        return self._hash
 
-    def __str__(self):
-        # type: () -> str
-        return "{}-{}-{}".format(self._interpreter, self._abi, self._platform)
+    def __str__(self) -> str:
+        return f"{self._interpreter}-{self._abi}-{self._platform}"
 
-    def __repr__(self):
-        # type: () -> str
+    def __repr__(self) -> str:
         return "<{self} @ {self_id}>".format(self=self, self_id=id(self))
 
 
-def parse_tag(tag):
-    # type: (str) -> FrozenSet[Tag]
+def parse_tag(tag: str) -> FrozenSet[Tag]:
     """
     Parses the provided tag (e.g. `py3-none-any`) into a frozenset of Tag instances.
 
@@ -129,24 +109,7 @@ def parse_tag(tag):
     return frozenset(tags)
 
 
-def _warn_keyword_parameter(func_name, kwargs):
-    # type: (str, Dict[str, bool]) -> bool
-    """
-    Backwards-compatibility with Python 2.7 to allow treating 'warn' as keyword-only.
-    """
-    if not kwargs:
-        return False
-    elif len(kwargs) > 1 or "warn" not in kwargs:
-        kwargs.pop("warn", None)
-        arg = next(iter(kwargs.keys()))
-        raise TypeError(
-            "{}() got an unexpected keyword argument {!r}".format(func_name, arg)
-        )
-    return kwargs["warn"]
-
-
-def _get_config_var(name, warn=False):
-    # type: (str, bool) -> Union[int, str, None]
+def _get_config_var(name: str, warn: bool = False) -> Union[int, str, None]:
     value = sysconfig.get_config_var(name)
     if value is None and warn:
         logger.debug(
@@ -155,13 +118,11 @@ def _get_config_var(name, warn=False):
     return value
 
 
-def _normalize_string(string):
-    # type: (str) -> str
+def _normalize_string(string: str) -> str:
     return string.replace(".", "_").replace("-", "_")
 
 
-def _abi3_applies(python_version):
-    # type: (PythonVersion) -> bool
+def _abi3_applies(python_version: PythonVersion) -> bool:
     """
     Determine if the Python version supports abi3.
 
@@ -170,8 +131,7 @@ def _abi3_applies(python_version):
     return len(python_version) > 1 and tuple(python_version) >= (3, 2)
 
 
-def _cpython_abis(py_version, warn=False):
-    # type: (PythonVersion, bool) -> List[str]
+def _cpython_abis(py_version: PythonVersion, warn: bool = False) -> List[str]:
     py_version = tuple(py_version)  # To allow for version comparison.
     abis = []
     version = _version_nodot(py_version[:2])
@@ -197,7 +157,7 @@ def _cpython_abis(py_version, warn=False):
     elif debug:
         # Debug builds can also load "normal" extension modules.
         # We can also assume no UCS-4 or pymalloc requirement.
-        abis.append("cp{version}".format(version=version))
+        abis.append(f"cp{version}")
     abis.insert(
         0,
         "cp{version}{debug}{pymalloc}{ucs4}".format(
@@ -208,12 +168,12 @@ def _cpython_abis(py_version, warn=False):
 
 
 def cpython_tags(
-    python_version=None,  # type: Optional[PythonVersion]
-    abis=None,  # type: Optional[Iterable[str]]
-    platforms=None,  # type: Optional[Iterable[str]]
-    **kwargs  # type: bool
-):
-    # type: (...) -> Iterator[Tag]
+    python_version: Optional[PythonVersion] = None,
+    abis: Optional[Iterable[str]] = None,
+    platforms: Optional[Iterable[str]] = None,
+    *,
+    warn: bool = False,
+) -> Iterator[Tag]:
     """
     Yields the tags for a CPython interpreter.
 
@@ -229,7 +189,6 @@ def cpython_tags(
     If 'abi3' or 'none' are specified in 'abis' then they will be yielded at
     their normal position and not at the beginning.
     """
-    warn = _warn_keyword_parameter("cpython_tags", kwargs)
     if not python_version:
         python_version = sys.version_info[:2]
 
@@ -248,15 +207,13 @@ def cpython_tags(
         except ValueError:
             pass
 
-    platforms = list(platforms or _platform_tags())
+    platforms = list(platforms or platform_tags())
     for abi in abis:
         for platform_ in platforms:
             yield Tag(interpreter, abi, platform_)
     if _abi3_applies(python_version):
-        for tag in (Tag(interpreter, "abi3", platform_) for platform_ in platforms):
-            yield tag
-    for tag in (Tag(interpreter, "none", platform_) for platform_ in platforms):
-        yield tag
+        yield from (Tag(interpreter, "abi3", platform_) for platform_ in platforms)
+    yield from (Tag(interpreter, "none", platform_) for platform_ in platforms)
 
     if _abi3_applies(python_version):
         for minor_version in range(python_version[1] - 1, 1, -1):
@@ -267,20 +224,19 @@ def cpython_tags(
                 yield Tag(interpreter, "abi3", platform_)
 
 
-def _generic_abi():
-    # type: () -> Iterator[str]
+def _generic_abi() -> Iterator[str]:
     abi = sysconfig.get_config_var("SOABI")
     if abi:
         yield _normalize_string(abi)
 
 
 def generic_tags(
-    interpreter=None,  # type: Optional[str]
-    abis=None,  # type: Optional[Iterable[str]]
-    platforms=None,  # type: Optional[Iterable[str]]
-    **kwargs  # type: bool
-):
-    # type: (...) -> Iterator[Tag]
+    interpreter: Optional[str] = None,
+    abis: Optional[Iterable[str]] = None,
+    platforms: Optional[Iterable[str]] = None,
+    *,
+    warn: bool = False,
+) -> Iterator[Tag]:
     """
     Yields the tags for a generic interpreter.
 
@@ -289,14 +245,13 @@ def generic_tags(
 
     The "none" ABI will be added if it was not explicitly provided.
     """
-    warn = _warn_keyword_parameter("generic_tags", kwargs)
     if not interpreter:
         interp_name = interpreter_name()
         interp_version = interpreter_version(warn=warn)
         interpreter = "".join([interp_name, interp_version])
     if abis is None:
         abis = _generic_abi()
-    platforms = list(platforms or _platform_tags())
+    platforms = list(platforms or platform_tags())
     abis = list(abis)
     if "none" not in abis:
         abis.append("none")
@@ -305,8 +260,7 @@ def generic_tags(
             yield Tag(interpreter, abi, platform_)
 
 
-def _py_interpreter_range(py_version):
-    # type: (PythonVersion) -> Iterator[str]
+def _py_interpreter_range(py_version: PythonVersion) -> Iterator[str]:
     """
     Yields Python versions in descending order.
 
@@ -322,11 +276,10 @@ def _py_interpreter_range(py_version):
 
 
 def compatible_tags(
-    python_version=None,  # type: Optional[PythonVersion]
-    interpreter=None,  # type: Optional[str]
-    platforms=None,  # type: Optional[Iterable[str]]
-):
-    # type: (...) -> Iterator[Tag]
+    python_version: Optional[PythonVersion] = None,
+    interpreter: Optional[str] = None,
+    platforms: Optional[Iterable[str]] = None,
+) -> Iterator[Tag]:
     """
     Yields the sequence of tags that are compatible with a specific version of Python.
 
@@ -337,7 +290,7 @@ def compatible_tags(
     """
     if not python_version:
         python_version = sys.version_info[:2]
-    platforms = list(platforms or _platform_tags())
+    platforms = list(platforms or platform_tags())
     for version in _py_interpreter_range(python_version):
         for platform_ in platforms:
             yield Tag(version, "none", platform_)
@@ -347,8 +300,7 @@ def compatible_tags(
         yield Tag(version, "none", "any")
 
 
-def _mac_arch(arch, is_32bit=_32_BIT_INTERPRETER):
-    # type: (str, bool) -> str
+def _mac_arch(arch: str, is_32bit: bool = _32_BIT_INTERPRETER) -> str:
     if not is_32bit:
         return arch
 
@@ -358,8 +310,7 @@ def _mac_arch(arch, is_32bit=_32_BIT_INTERPRETER):
     return "i386"
 
 
-def _mac_binary_formats(version, cpu_arch):
-    # type: (MacVersion, str) -> List[str]
+def _mac_binary_formats(version: MacVersion, cpu_arch: str) -> List[str]:
     formats = [cpu_arch]
     if cpu_arch == "x86_64":
         if version < (10, 4):
@@ -382,12 +333,18 @@ def _mac_binary_formats(version, cpu_arch):
             return []
         formats.extend(["fat32", "fat"])
 
-    formats.append("universal")
+    if cpu_arch in {"arm64", "x86_64"}:
+        formats.append("universal2")
+
+    if cpu_arch in {"x86_64", "i386", "ppc64", "ppc", "intel"}:
+        formats.append("universal")
+
     return formats
 
 
-def mac_platforms(version=None, arch=None):
-    # type: (Optional[MacVersion], Optional[str]) -> Iterator[str]
+def mac_platforms(
+    version: Optional[MacVersion] = None, arch: Optional[str] = None
+) -> Iterator[str]:
     """
     Yields the platform tags for a macOS system.
 
@@ -396,7 +353,7 @@ def mac_platforms(version=None, arch=None):
     generate platform tags for. Both parameters default to the appropriate value
     for the current system.
     """
-    version_str, _, cpu_arch = platform.mac_ver()  # type: ignore
+    version_str, _, cpu_arch = platform.mac_ver()
     if version is None:
         version = cast("MacVersion", tuple(map(int, version_str.split(".")[:2])))
     else:
@@ -405,283 +362,76 @@ def mac_platforms(version=None, arch=None):
         arch = _mac_arch(cpu_arch)
     else:
         arch = arch
-    for minor_version in range(version[1], -1, -1):
-        compat_version = version[0], minor_version
-        binary_formats = _mac_binary_formats(compat_version, arch)
-        for binary_format in binary_formats:
-            yield "macosx_{major}_{minor}_{binary_format}".format(
-                major=compat_version[0],
-                minor=compat_version[1],
-                binary_format=binary_format,
-            )
-
-
-# From PEP 513.
-def _is_manylinux_compatible(name, glibc_version):
-    # type: (str, GlibcVersion) -> bool
-    # Check for presence of _manylinux module.
-    try:
-        import _manylinux  # noqa
-
-        return bool(getattr(_manylinux, name + "_compatible"))
-    except (ImportError, AttributeError):
-        # Fall through to heuristic check below.
-        pass
 
-    return _have_compatible_glibc(*glibc_version)
-
-
-def _glibc_version_string():
-    # type: () -> Optional[str]
-    # Returns glibc version string, or None if not using glibc.
-    return _glibc_version_string_confstr() or _glibc_version_string_ctypes()
-
-
-def _glibc_version_string_confstr():
-    # type: () -> Optional[str]
-    """
-    Primary implementation of glibc_version_string using os.confstr.
-    """
-    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
-    # to be broken or missing. This strategy is used in the standard library
-    # platform module.
-    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c9d0921ff3d70e1127ca1b71/Lib/platform.py#L175-L183
-    try:
-        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17".
-        version_string = os.confstr(  # type: ignore[attr-defined] # noqa: F821
-            "CS_GNU_LIBC_VERSION"
-        )
-        assert version_string is not None
-        _, version = version_string.split()  # type: Tuple[str, str]
-    except (AssertionError, AttributeError, OSError, ValueError):
-        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
-        return None
-    return version
+    if (10, 0) <= version and version < (11, 0):
+        # Prior to Mac OS 11, each yearly release of Mac OS bumped the
+        # "minor" version number.  The major version was always 10.
+        for minor_version in range(version[1], -1, -1):
+            compat_version = 10, minor_version
+            binary_formats = _mac_binary_formats(compat_version, arch)
+            for binary_format in binary_formats:
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=10, minor=minor_version, binary_format=binary_format
+                )
 
+    if version >= (11, 0):
+        # Starting with Mac OS 11, each yearly release bumps the major version
+        # number.   The minor versions are now the midyear updates.
+        for major_version in range(version[0], 10, -1):
+            compat_version = major_version, 0
+            binary_formats = _mac_binary_formats(compat_version, arch)
+            for binary_format in binary_formats:
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=major_version, minor=0, binary_format=binary_format
+                )
 
-def _glibc_version_string_ctypes():
-    # type: () -> Optional[str]
-    """
-    Fallback implementation of glibc_version_string using ctypes.
-    """
-    try:
-        import ctypes
-    except ImportError:
-        return None
-
-    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
-    # manpage says, "If filename is NULL, then the returned handle is for the
-    # main program". This way we can let the linker do the work to figure out
-    # which libc our process is actually using.
-    #
-    # Note: typeshed is wrong here so we are ignoring this line.
-    process_namespace = ctypes.CDLL(None)  # type: ignore
-    try:
-        gnu_get_libc_version = process_namespace.gnu_get_libc_version
-    except AttributeError:
-        # Symbol doesn't exist -> therefore, we are not linked to
-        # glibc.
-        return None
-
-    # Call gnu_get_libc_version, which returns a string like "2.5"
-    gnu_get_libc_version.restype = ctypes.c_char_p
-    version_str = gnu_get_libc_version()  # type: str
-    # py2 / py3 compatibility:
-    if not isinstance(version_str, str):
-        version_str = version_str.decode("ascii")
-
-    return version_str
-
-
-# Separated out from have_compatible_glibc for easier unit testing.
-def _check_glibc_version(version_str, required_major, minimum_minor):
-    # type: (str, int, int) -> bool
-    # Parse string and check against requested version.
-    #
-    # We use a regexp instead of str.split because we want to discard any
-    # random junk that might come after the minor version -- this might happen
-    # in patched/forked versions of glibc (e.g. Linaro's version of glibc
-    # uses version strings like "2.20-2014.11"). See gh-3588.
-    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
-    if not m:
-        warnings.warn(
-            "Expected glibc version with 2 components major.minor,"
-            " got: %s" % version_str,
-            RuntimeWarning,
-        )
-        return False
-    return (
-        int(m.group("major")) == required_major
-        and int(m.group("minor")) >= minimum_minor
-    )
+    if version >= (11, 0):
+        # Mac OS 11 on x86_64 is compatible with binaries from previous releases.
+        # Arm64 support was introduced in 11.0, so no Arm binaries from previous
+        # releases exist.
+        #
+        # However, the "universal2" binary format can have a
+        # macOS version earlier than 11.0 when the x86_64 part of the binary supports
+        # that version of macOS.
+        if arch == "x86_64":
+            for minor_version in range(16, 3, -1):
+                compat_version = 10, minor_version
+                binary_formats = _mac_binary_formats(compat_version, arch)
+                for binary_format in binary_formats:
+                    yield "macosx_{major}_{minor}_{binary_format}".format(
+                        major=compat_version[0],
+                        minor=compat_version[1],
+                        binary_format=binary_format,
+                    )
+        else:
+            for minor_version in range(16, 3, -1):
+                compat_version = 10, minor_version
+                binary_format = "universal2"
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=compat_version[0],
+                    minor=compat_version[1],
+                    binary_format=binary_format,
+                )
 
 
-def _have_compatible_glibc(required_major, minimum_minor):
-    # type: (int, int) -> bool
-    version_str = _glibc_version_string()
-    if version_str is None:
-        return False
-    return _check_glibc_version(version_str, required_major, minimum_minor)
-
-
-# Python does not provide platform information at sufficient granularity to
-# identify the architecture of the running executable in some cases, so we
-# determine it dynamically by reading the information from the running
-# process. This only applies on Linux, which uses the ELF format.
-class _ELFFileHeader(object):
-    # https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
-    class _InvalidELFFileHeader(ValueError):
-        """
-        An invalid ELF file header was found.
-        """
-
-    ELF_MAGIC_NUMBER = 0x7F454C46
-    ELFCLASS32 = 1
-    ELFCLASS64 = 2
-    ELFDATA2LSB = 1
-    ELFDATA2MSB = 2
-    EM_386 = 3
-    EM_S390 = 22
-    EM_ARM = 40
-    EM_X86_64 = 62
-    EF_ARM_ABIMASK = 0xFF000000
-    EF_ARM_ABI_VER5 = 0x05000000
-    EF_ARM_ABI_FLOAT_HARD = 0x00000400
-
-    def __init__(self, file):
-        # type: (IO[bytes]) -> None
-        def unpack(fmt):
-            # type: (str) -> int
-            try:
-                (result,) = struct.unpack(
-                    fmt, file.read(struct.calcsize(fmt))
-                )  # type: (int, )
-            except struct.error:
-                raise _ELFFileHeader._InvalidELFFileHeader()
-            return result
-
-        self.e_ident_magic = unpack(">I")
-        if self.e_ident_magic != self.ELF_MAGIC_NUMBER:
-            raise _ELFFileHeader._InvalidELFFileHeader()
-        self.e_ident_class = unpack("B")
-        if self.e_ident_class not in {self.ELFCLASS32, self.ELFCLASS64}:
-            raise _ELFFileHeader._InvalidELFFileHeader()
-        self.e_ident_data = unpack("B")
-        if self.e_ident_data not in {self.ELFDATA2LSB, self.ELFDATA2MSB}:
-            raise _ELFFileHeader._InvalidELFFileHeader()
-        self.e_ident_version = unpack("B")
-        self.e_ident_osabi = unpack("B")
-        self.e_ident_abiversion = unpack("B")
-        self.e_ident_pad = file.read(7)
-        format_h = "<H" if self.e_ident_data == self.ELFDATA2LSB else ">H"
-        format_i = "<I" if self.e_ident_data == self.ELFDATA2LSB else ">I"
-        format_q = "<Q" if self.e_ident_data == self.ELFDATA2LSB else ">Q"
-        format_p = format_i if self.e_ident_class == self.ELFCLASS32 else format_q
-        self.e_type = unpack(format_h)
-        self.e_machine = unpack(format_h)
-        self.e_version = unpack(format_i)
-        self.e_entry = unpack(format_p)
-        self.e_phoff = unpack(format_p)
-        self.e_shoff = unpack(format_p)
-        self.e_flags = unpack(format_i)
-        self.e_ehsize = unpack(format_h)
-        self.e_phentsize = unpack(format_h)
-        self.e_phnum = unpack(format_h)
-        self.e_shentsize = unpack(format_h)
-        self.e_shnum = unpack(format_h)
-        self.e_shstrndx = unpack(format_h)
-
-
-def _get_elf_header():
-    # type: () -> Optional[_ELFFileHeader]
-    try:
-        with open(sys.executable, "rb") as f:
-            elf_header = _ELFFileHeader(f)
-    except (IOError, OSError, TypeError, _ELFFileHeader._InvalidELFFileHeader):
-        return None
-    return elf_header
-
-
-def _is_linux_armhf():
-    # type: () -> bool
-    # hard-float ABI can be detected from the ELF header of the running
-    # process
-    # https://static.docs.arm.com/ihi0044/g/aaelf32.pdf
-    elf_header = _get_elf_header()
-    if elf_header is None:
-        return False
-    result = elf_header.e_ident_class == elf_header.ELFCLASS32
-    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
-    result &= elf_header.e_machine == elf_header.EM_ARM
-    result &= (
-        elf_header.e_flags & elf_header.EF_ARM_ABIMASK
-    ) == elf_header.EF_ARM_ABI_VER5
-    result &= (
-        elf_header.e_flags & elf_header.EF_ARM_ABI_FLOAT_HARD
-    ) == elf_header.EF_ARM_ABI_FLOAT_HARD
-    return result
-
-
-def _is_linux_i686():
-    # type: () -> bool
-    elf_header = _get_elf_header()
-    if elf_header is None:
-        return False
-    result = elf_header.e_ident_class == elf_header.ELFCLASS32
-    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
-    result &= elf_header.e_machine == elf_header.EM_386
-    return result
-
-
-def _have_compatible_manylinux_abi(arch):
-    # type: (str) -> bool
-    if arch == "armv7l":
-        return _is_linux_armhf()
-    if arch == "i686":
-        return _is_linux_i686()
-    return True
-
-
-def _linux_platforms(is_32bit=_32_BIT_INTERPRETER):
-    # type: (bool) -> Iterator[str]
-    linux = _normalize_string(distutils.util.get_platform())
+def _linux_platforms(is_32bit: bool = _32_BIT_INTERPRETER) -> Iterator[str]:
+    linux = _normalize_string(sysconfig.get_platform())
     if is_32bit:
         if linux == "linux_x86_64":
             linux = "linux_i686"
         elif linux == "linux_aarch64":
             linux = "linux_armv7l"
-    manylinux_support = []
     _, arch = linux.split("_", 1)
-    if _have_compatible_manylinux_abi(arch):
-        if arch in {"x86_64", "i686", "aarch64", "armv7l", "ppc64", "ppc64le", "s390x"}:
-            manylinux_support.append(
-                ("manylinux2014", (2, 17))
-            )  # CentOS 7 w/ glibc 2.17 (PEP 599)
-        if arch in {"x86_64", "i686"}:
-            manylinux_support.append(
-                ("manylinux2010", (2, 12))
-            )  # CentOS 6 w/ glibc 2.12 (PEP 571)
-            manylinux_support.append(
-                ("manylinux1", (2, 5))
-            )  # CentOS 5 w/ glibc 2.5 (PEP 513)
-    manylinux_support_iter = iter(manylinux_support)
-    for name, glibc_version in manylinux_support_iter:
-        if _is_manylinux_compatible(name, glibc_version):
-            yield linux.replace("linux", name)
-            break
-    # Support for a later manylinux implies support for an earlier version.
-    for name, _ in manylinux_support_iter:
-        yield linux.replace("linux", name)
+    yield from _manylinux.platform_tags(linux, arch)
+    yield from _musllinux.platform_tags(arch)
     yield linux
 
 
-def _generic_platforms():
-    # type: () -> Iterator[str]
-    yield _normalize_string(distutils.util.get_platform())
+def _generic_platforms() -> Iterator[str]:
+    yield _normalize_string(sysconfig.get_platform())
 
 
-def _platform_tags():
-    # type: () -> Iterator[str]
+def platform_tags() -> Iterator[str]:
     """
     Provides the platform tags for this installation.
     """
@@ -693,25 +443,18 @@ def _platform_tags():
         return _generic_platforms()
 
 
-def interpreter_name():
-    # type: () -> str
+def interpreter_name() -> str:
     """
     Returns the name of the running interpreter.
     """
-    try:
-        name = sys.implementation.name  # type: ignore
-    except AttributeError:  # pragma: no cover
-        # Python 2.7 compatibility.
-        name = platform.python_implementation().lower()
+    name = sys.implementation.name
     return INTERPRETER_SHORT_NAMES.get(name) or name
 
 
-def interpreter_version(**kwargs):
-    # type: (bool) -> str
+def interpreter_version(*, warn: bool = False) -> str:
     """
     Returns the version of the running interpreter.
     """
-    warn = _warn_keyword_parameter("interpreter_version", kwargs)
     version = _get_config_var("py_version_nodot", warn=warn)
     if version:
         version = str(version)
@@ -720,32 +463,22 @@ def interpreter_version(**kwargs):
     return version
 
 
-def _version_nodot(version):
-    # type: (PythonVersion) -> str
-    if any(v >= 10 for v in version):
-        sep = "_"
-    else:
-        sep = ""
-    return sep.join(map(str, version))
+def _version_nodot(version: PythonVersion) -> str:
+    return "".join(map(str, version))
 
 
-def sys_tags(**kwargs):
-    # type: (bool) -> Iterator[Tag]
+def sys_tags(*, warn: bool = False) -> Iterator[Tag]:
     """
     Returns the sequence of tag triples for the running interpreter.
 
     The order of the sequence corresponds to priority order for the
     interpreter, from most to least important.
     """
-    warn = _warn_keyword_parameter("sys_tags", kwargs)
 
     interp_name = interpreter_name()
     if interp_name == "cp":
-        for tag in cpython_tags(warn=warn):
-            yield tag
+        yield from cpython_tags(warn=warn)
     else:
-        for tag in generic_tags():
-            yield tag
+        yield from generic_tags()
 
-    for tag in compatible_tags():
-        yield tag
+    yield from compatible_tags()
diff --git a/setuptools/_vendor/packaging/utils.py b/setuptools/_vendor/packaging/utils.py
index 19579c1a..bab11b80 100644
--- a/setuptools/_vendor/packaging/utils.py
+++ b/setuptools/_vendor/packaging/utils.py
@@ -1,65 +1,136 @@
 # 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 re
+from typing import FrozenSet, NewType, Tuple, Union, cast
 
-from ._typing import TYPE_CHECKING, cast
+from .tags import Tag, parse_tag
 from .version import InvalidVersion, Version
 
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import NewType, Union
+BuildTag = Union[Tuple[()], Tuple[int, str]]
+NormalizedName = NewType("NormalizedName", str)
+
+
+class InvalidWheelFilename(ValueError):
+    """
+    An invalid wheel filename was found, users should refer to PEP 427.
+    """
+
+
+class InvalidSdistFilename(ValueError):
+    """
+    An invalid sdist filename was found, users should refer to the packaging user guide.
+    """
 
-    NormalizedName = NewType("NormalizedName", str)
 
 _canonicalize_regex = re.compile(r"[-_.]+")
+# PEP 427: The build number must start with a digit.
+_build_tag_regex = re.compile(r"(\d+)(.*)")
 
 
-def canonicalize_name(name):
-    # type: (str) -> NormalizedName
+def canonicalize_name(name: str) -> NormalizedName:
     # This is taken from PEP 503.
     value = _canonicalize_regex.sub("-", name).lower()
-    return cast("NormalizedName", value)
+    return cast(NormalizedName, value)
 
 
-def canonicalize_version(_version):
-    # type: (str) -> Union[Version, str]
+def canonicalize_version(version: Union[Version, str]) -> str:
     """
     This is very similar to Version.__str__, but has one subtle difference
     with the way it handles the release segment.
     """
-
-    try:
-        version = Version(_version)
-    except InvalidVersion:
-        # Legacy versions cannot be normalized
-        return _version
+    if isinstance(version, str):
+        try:
+            parsed = Version(version)
+        except InvalidVersion:
+            # Legacy versions cannot be normalized
+            return version
+    else:
+        parsed = version
 
     parts = []
 
     # Epoch
-    if version.epoch != 0:
-        parts.append("{0}!".format(version.epoch))
+    if parsed.epoch != 0:
+        parts.append(f"{parsed.epoch}!")
 
     # Release segment
     # NB: This strips trailing '.0's to normalize
-    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
+    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in parsed.release)))
 
     # Pre-release
-    if version.pre is not None:
-        parts.append("".join(str(x) for x in version.pre))
+    if parsed.pre is not None:
+        parts.append("".join(str(x) for x in parsed.pre))
 
     # Post-release
-    if version.post is not None:
-        parts.append(".post{0}".format(version.post))
+    if parsed.post is not None:
+        parts.append(f".post{parsed.post}")
 
     # Development release
-    if version.dev is not None:
-        parts.append(".dev{0}".format(version.dev))
+    if parsed.dev is not None:
+        parts.append(f".dev{parsed.dev}")
 
     # Local version segment
-    if version.local is not None:
-        parts.append("+{0}".format(version.local))
+    if parsed.local is not None:
+        parts.append(f"+{parsed.local}")
 
     return "".join(parts)
+
+
+def parse_wheel_filename(
+    filename: str,
+) -> Tuple[NormalizedName, Version, BuildTag, FrozenSet[Tag]]:
+    if not filename.endswith(".whl"):
+        raise InvalidWheelFilename(
+            f"Invalid wheel filename (extension must be '.whl'): {filename}"
+        )
+
+    filename = filename[:-4]
+    dashes = filename.count("-")
+    if dashes not in (4, 5):
+        raise InvalidWheelFilename(
+            f"Invalid wheel filename (wrong number of parts): {filename}"
+        )
+
+    parts = filename.split("-", dashes - 2)
+    name_part = parts[0]
+    # See PEP 427 for the rules on escaping the project name
+    if "__" in name_part or re.match(r"^[\w\d._]*$", name_part, re.UNICODE) is None:
+        raise InvalidWheelFilename(f"Invalid project name: {filename}")
+    name = canonicalize_name(name_part)
+    version = Version(parts[1])
+    if dashes == 5:
+        build_part = parts[2]
+        build_match = _build_tag_regex.match(build_part)
+        if build_match is None:
+            raise InvalidWheelFilename(
+                f"Invalid build number: {build_part} in '{filename}'"
+            )
+        build = cast(BuildTag, (int(build_match.group(1)), build_match.group(2)))
+    else:
+        build = ()
+    tags = parse_tag(parts[-1])
+    return (name, version, build, tags)
+
+
+def parse_sdist_filename(filename: str) -> Tuple[NormalizedName, Version]:
+    if filename.endswith(".tar.gz"):
+        file_stem = filename[: -len(".tar.gz")]
+    elif filename.endswith(".zip"):
+        file_stem = filename[: -len(".zip")]
+    else:
+        raise InvalidSdistFilename(
+            f"Invalid sdist filename (extension must be '.tar.gz' or '.zip'):"
+            f" {filename}"
+        )
+
+    # We are requiring a PEP 440 version, which cannot contain dashes,
+    # so we split on the last dash.
+    name_part, sep, version_part = file_stem.rpartition("-")
+    if not sep:
+        raise InvalidSdistFilename(f"Invalid sdist filename: {filename}")
+
+    name = canonicalize_name(name_part)
+    version = Version(version_part)
+    return (name, version)
diff --git a/setuptools/_vendor/packaging/version.py b/setuptools/_vendor/packaging/version.py
index 00371e86..de9a09a4 100644
--- a/setuptools/_vendor/packaging/version.py
+++ b/setuptools/_vendor/packaging/version.py
@@ -1,52 +1,45 @@
 # 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 collections
 import itertools
 import re
+import warnings
+from typing import Callable, Iterator, List, Optional, SupportsInt, Tuple, Union
 
-from ._structures import Infinity, NegativeInfinity
-from ._typing import TYPE_CHECKING
-
-if TYPE_CHECKING:  # pragma: no cover
-    from typing import Callable, Iterator, List, Optional, SupportsInt, Tuple, Union
-
-    from ._structures import InfinityType, NegativeInfinityType
-
-    InfiniteTypes = Union[InfinityType, NegativeInfinityType]
-    PrePostDevType = Union[InfiniteTypes, Tuple[str, int]]
-    SubLocalType = Union[InfiniteTypes, int, str]
-    LocalType = Union[
-        NegativeInfinityType,
-        Tuple[
-            Union[
-                SubLocalType,
-                Tuple[SubLocalType, str],
-                Tuple[NegativeInfinityType, SubLocalType],
-            ],
-            ...,
-        ],
-    ]
-    CmpKey = Tuple[
-        int, Tuple[int, ...], PrePostDevType, PrePostDevType, PrePostDevType, LocalType
-    ]
-    LegacyCmpKey = Tuple[int, Tuple[str, ...]]
-    VersionComparisonMethod = Callable[
-        [Union[CmpKey, LegacyCmpKey], Union[CmpKey, LegacyCmpKey]], bool
-    ]
+from ._structures import Infinity, InfinityType, NegativeInfinity, NegativeInfinityType
 
 __all__ = ["parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"]
 
+InfiniteTypes = Union[InfinityType, NegativeInfinityType]
+PrePostDevType = Union[InfiniteTypes, Tuple[str, int]]
+SubLocalType = Union[InfiniteTypes, int, str]
+LocalType = Union[
+    NegativeInfinityType,
+    Tuple[
+        Union[
+            SubLocalType,
+            Tuple[SubLocalType, str],
+            Tuple[NegativeInfinityType, SubLocalType],
+        ],
+        ...,
+    ],
+]
+CmpKey = Tuple[
+    int, Tuple[int, ...], PrePostDevType, PrePostDevType, PrePostDevType, LocalType
+]
+LegacyCmpKey = Tuple[int, Tuple[str, ...]]
+VersionComparisonMethod = Callable[
+    [Union[CmpKey, LegacyCmpKey], Union[CmpKey, LegacyCmpKey]], bool
+]
 
 _Version = collections.namedtuple(
     "_Version", ["epoch", "release", "dev", "pre", "post", "local"]
 )
 
 
-def parse(version):
-    # type: (str) -> Union[LegacyVersion, Version]
+def parse(version: str) -> Union["LegacyVersion", "Version"]:
     """
     Parse the given version string and return either a :class:`Version` object
     or a :class:`LegacyVersion` object depending on if the given version is
@@ -64,112 +57,111 @@ class InvalidVersion(ValueError):
     """
 
 
-class _BaseVersion(object):
-    _key = None  # type: Union[CmpKey, LegacyCmpKey]
+class _BaseVersion:
+    _key: Union[CmpKey, LegacyCmpKey]
 
-    def __hash__(self):
-        # type: () -> int
+    def __hash__(self) -> int:
         return hash(self._key)
 
-    def __lt__(self, other):
-        # type: (_BaseVersion) -> bool
-        return self._compare(other, lambda s, o: s < o)
+    # Please keep the duplicated `isinstance` check
+    # in the six comparisons hereunder
+    # unless you find a way to avoid adding overhead function calls.
+    def __lt__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key < other._key
+
+    def __le__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key <= other._key
 
-    def __le__(self, other):
-        # type: (_BaseVersion) -> bool
-        return self._compare(other, lambda s, o: s <= o)
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
 
-    def __eq__(self, other):
-        # type: (object) -> bool
-        return self._compare(other, lambda s, o: s == o)
+        return self._key == other._key
 
-    def __ge__(self, other):
-        # type: (_BaseVersion) -> bool
-        return self._compare(other, lambda s, o: s >= o)
+    def __ge__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
 
-    def __gt__(self, other):
-        # type: (_BaseVersion) -> bool
-        return self._compare(other, lambda s, o: s > o)
+        return self._key >= other._key
 
-    def __ne__(self, other):
-        # type: (object) -> bool
-        return self._compare(other, lambda s, o: s != o)
+    def __gt__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key > other._key
 
-    def _compare(self, other, method):
-        # type: (object, VersionComparisonMethod) -> Union[bool, NotImplemented]
+    def __ne__(self, other: object) -> bool:
         if not isinstance(other, _BaseVersion):
             return NotImplemented
 
-        return method(self._key, other._key)
+        return self._key != other._key
 
 
 class LegacyVersion(_BaseVersion):
-    def __init__(self, version):
-        # type: (str) -> None
+    def __init__(self, version: str) -> None:
         self._version = str(version)
         self._key = _legacy_cmpkey(self._version)
 
-    def __str__(self):
-        # type: () -> str
+        warnings.warn(
+            "Creating a LegacyVersion has been deprecated and will be "
+            "removed in the next major release",
+            DeprecationWarning,
+        )
+
+    def __str__(self) -> str:
         return self._version
 
-    def __repr__(self):
-        # type: () -> str
-        return "<LegacyVersion({0})>".format(repr(str(self)))
+    def __repr__(self) -> str:
+        return f"<LegacyVersion('{self}')>"
 
     @property
-    def public(self):
-        # type: () -> str
+    def public(self) -> str:
         return self._version
 
     @property
-    def base_version(self):
-        # type: () -> str
+    def base_version(self) -> str:
         return self._version
 
     @property
-    def epoch(self):
-        # type: () -> int
+    def epoch(self) -> int:
         return -1
 
     @property
-    def release(self):
-        # type: () -> None
+    def release(self) -> None:
         return None
 
     @property
-    def pre(self):
-        # type: () -> None
+    def pre(self) -> None:
         return None
 
     @property
-    def post(self):
-        # type: () -> None
+    def post(self) -> None:
         return None
 
     @property
-    def dev(self):
-        # type: () -> None
+    def dev(self) -> None:
         return None
 
     @property
-    def local(self):
-        # type: () -> None
+    def local(self) -> None:
         return None
 
     @property
-    def is_prerelease(self):
-        # type: () -> bool
+    def is_prerelease(self) -> bool:
         return False
 
     @property
-    def is_postrelease(self):
-        # type: () -> bool
+    def is_postrelease(self) -> bool:
         return False
 
     @property
-    def is_devrelease(self):
-        # type: () -> bool
+    def is_devrelease(self) -> bool:
         return False
 
 
@@ -184,8 +176,7 @@ _legacy_version_replacement_map = {
 }
 
 
-def _parse_version_parts(s):
-    # type: (str) -> Iterator[str]
+def _parse_version_parts(s: str) -> Iterator[str]:
     for part in _legacy_version_component_re.split(s):
         part = _legacy_version_replacement_map.get(part, part)
 
@@ -202,8 +193,7 @@ def _parse_version_parts(s):
     yield "*final"
 
 
-def _legacy_cmpkey(version):
-    # type: (str) -> LegacyCmpKey
+def _legacy_cmpkey(version: str) -> LegacyCmpKey:
 
     # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
     # greater than or equal to 0. This will effectively put the LegacyVersion,
@@ -213,7 +203,7 @@ def _legacy_cmpkey(version):
 
     # This scheme is taken from pkg_resources.parse_version setuptools prior to
     # it's adoption of the packaging library.
-    parts = []  # type: List[str]
+    parts: List[str] = []
     for part in _parse_version_parts(version.lower()):
         if part.startswith("*"):
             # remove "-" before a prerelease tag
@@ -268,13 +258,12 @@ class Version(_BaseVersion):
 
     _regex = re.compile(r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE)
 
-    def __init__(self, version):
-        # type: (str) -> None
+    def __init__(self, version: str) -> None:
 
         # Validate the version and parse it into pieces
         match = self._regex.search(version)
         if not match:
-            raise InvalidVersion("Invalid version: '{0}'".format(version))
+            raise InvalidVersion(f"Invalid version: '{version}'")
 
         # Store the parsed out pieces of the version
         self._version = _Version(
@@ -298,17 +287,15 @@ class Version(_BaseVersion):
             self._version.local,
         )
 
-    def __repr__(self):
-        # type: () -> str
-        return "<Version({0})>".format(repr(str(self)))
+    def __repr__(self) -> str:
+        return f"<Version('{self}')>"
 
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
         parts = []
 
         # Epoch
         if self.epoch != 0:
-            parts.append("{0}!".format(self.epoch))
+            parts.append(f"{self.epoch}!")
 
         # Release segment
         parts.append(".".join(str(x) for x in self.release))
@@ -319,67 +306,59 @@ class Version(_BaseVersion):
 
         # Post-release
         if self.post is not None:
-            parts.append(".post{0}".format(self.post))
+            parts.append(f".post{self.post}")
 
         # Development release
         if self.dev is not None:
-            parts.append(".dev{0}".format(self.dev))
+            parts.append(f".dev{self.dev}")
 
         # Local version segment
         if self.local is not None:
-            parts.append("+{0}".format(self.local))
+            parts.append(f"+{self.local}")
 
         return "".join(parts)
 
     @property
-    def epoch(self):
-        # type: () -> int
-        _epoch = self._version.epoch  # type: int
+    def epoch(self) -> int:
+        _epoch: int = self._version.epoch
         return _epoch
 
     @property
-    def release(self):
-        # type: () -> Tuple[int, ...]
-        _release = self._version.release  # type: Tuple[int, ...]
+    def release(self) -> Tuple[int, ...]:
+        _release: Tuple[int, ...] = self._version.release
         return _release
 
     @property
-    def pre(self):
-        # type: () -> Optional[Tuple[str, int]]
-        _pre = self._version.pre  # type: Optional[Tuple[str, int]]
+    def pre(self) -> Optional[Tuple[str, int]]:
+        _pre: Optional[Tuple[str, int]] = self._version.pre
         return _pre
 
     @property
-    def post(self):
-        # type: () -> Optional[Tuple[str, int]]
+    def post(self) -> Optional[int]:
         return self._version.post[1] if self._version.post else None
 
     @property
-    def dev(self):
-        # type: () -> Optional[Tuple[str, int]]
+    def dev(self) -> Optional[int]:
         return self._version.dev[1] if self._version.dev else None
 
     @property
-    def local(self):
-        # type: () -> Optional[str]
+    def local(self) -> Optional[str]:
         if self._version.local:
             return ".".join(str(x) for x in self._version.local)
         else:
             return None
 
     @property
-    def public(self):
-        # type: () -> str
+    def public(self) -> str:
         return str(self).split("+", 1)[0]
 
     @property
-    def base_version(self):
-        # type: () -> str
+    def base_version(self) -> str:
         parts = []
 
         # Epoch
         if self.epoch != 0:
-            parts.append("{0}!".format(self.epoch))
+            parts.append(f"{self.epoch}!")
 
         # Release segment
         parts.append(".".join(str(x) for x in self.release))
@@ -387,41 +366,33 @@ class Version(_BaseVersion):
         return "".join(parts)
 
     @property
-    def is_prerelease(self):
-        # type: () -> bool
+    def is_prerelease(self) -> bool:
         return self.dev is not None or self.pre is not None
 
     @property
-    def is_postrelease(self):
-        # type: () -> bool
+    def is_postrelease(self) -> bool:
         return self.post is not None
 
     @property
-    def is_devrelease(self):
-        # type: () -> bool
+    def is_devrelease(self) -> bool:
         return self.dev is not None
 
     @property
-    def major(self):
-        # type: () -> int
+    def major(self) -> int:
         return self.release[0] if len(self.release) >= 1 else 0
 
     @property
-    def minor(self):
-        # type: () -> int
+    def minor(self) -> int:
         return self.release[1] if len(self.release) >= 2 else 0
 
     @property
-    def micro(self):
-        # type: () -> int
+    def micro(self) -> int:
         return self.release[2] if len(self.release) >= 3 else 0
 
 
 def _parse_letter_version(
-    letter,  # type: str
-    number,  # type: Union[str, bytes, SupportsInt]
-):
-    # type: (...) -> Optional[Tuple[str, int]]
+    letter: str, number: Union[str, bytes, SupportsInt]
+) -> Optional[Tuple[str, int]]:
 
     if letter:
         # We consider there to be an implicit 0 in a pre-release if there is
@@ -458,8 +429,7 @@ def _parse_letter_version(
 _local_version_separators = re.compile(r"[\._-]")
 
 
-def _parse_local_version(local):
-    # type: (str) -> Optional[LocalType]
+def _parse_local_version(local: str) -> Optional[LocalType]:
     """
     Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
     """
@@ -472,14 +442,13 @@ def _parse_local_version(local):
 
 
 def _cmpkey(
-    epoch,  # type: int
-    release,  # type: Tuple[int, ...]
-    pre,  # type: Optional[Tuple[str, int]]
-    post,  # type: Optional[Tuple[str, int]]
-    dev,  # type: Optional[Tuple[str, int]]
-    local,  # type: Optional[Tuple[SubLocalType]]
-):
-    # type: (...) -> CmpKey
+    epoch: int,
+    release: Tuple[int, ...],
+    pre: Optional[Tuple[str, int]],
+    post: Optional[Tuple[str, int]],
+    dev: Optional[Tuple[str, int]],
+    local: Optional[Tuple[SubLocalType]],
+) -> CmpKey:
 
     # When we compare a release version, we want to compare it with all of the
     # trailing zeros removed. So we'll use a reverse the list, drop all the now
@@ -495,7 +464,7 @@ def _cmpkey(
     # if there is not a pre or a post segment. If we have one of those then
     # the normal sorting rules will handle this case correctly.
     if pre is None and post is None and dev is not None:
-        _pre = NegativeInfinity  # type: PrePostDevType
+        _pre: PrePostDevType = NegativeInfinity
     # Versions without a pre-release (except as noted above) should sort after
     # those with one.
     elif pre is None:
@@ -505,21 +474,21 @@ def _cmpkey(
 
     # Versions without a post segment should sort before those with one.
     if post is None:
-        _post = NegativeInfinity  # type: PrePostDevType
+        _post: PrePostDevType = NegativeInfinity
 
     else:
         _post = post
 
     # Versions without a development segment should sort after those with one.
     if dev is None:
-        _dev = Infinity  # type: PrePostDevType
+        _dev: PrePostDevType = Infinity
 
     else:
         _dev = dev
 
     if local is None:
         # Versions without a local segment should sort before those with one.
-        _local = NegativeInfinity  # type: LocalType
+        _local: LocalType = NegativeInfinity
     else:
         # Versions with a local segment need that segment parsed to implement
         # the sorting rules in PEP440.
diff --git a/setuptools/_vendor/pyparsing.py b/setuptools/_vendor/pyparsing.py
index 4cae7883..cf75e1e5 100644
--- a/setuptools/_vendor/pyparsing.py
+++ b/setuptools/_vendor/pyparsing.py
@@ -1625,7 +1625,7 @@ class ParserElement(object):
            (see L{I{parseWithTabs}<parseWithTabs>})

          - define your parse action using the full C{(s,loc,toks)} signature, and

            reference the input string using the parse action's C{s} argument

-         - explicitly expand the tabs in your input string before calling

+         - explictly expand the tabs in your input string before calling

            C{parseString}

         

         Example::

diff --git a/setuptools/_vendor/vendored.txt b/setuptools/_vendor/vendored.txt
index d9804741..8216ec99 100644
--- a/setuptools/_vendor/vendored.txt
+++ b/setuptools/_vendor/vendored.txt
@@ -1,4 +1,4 @@
-packaging==20.4
+packaging==21.2
 pyparsing==2.2.1
 ordered-set==3.1.1
 more_itertools==8.8.0