From 80b2c82d0c472deb40b09da5b045786c85b9a159 Mon Sep 17 00:00:00 2001
From: Chris Hunt <chrahunt@gmail.com>
Date: Sat, 23 Nov 2019 18:02:25 -0500
Subject: [PATCH 1/2] Use packaging.tags.Tag in place of Tuple

This is the standard type used by packaging.tags. Making this change
throughout the code lets us start switching over to using its
tag-generating functions in get_supported().

We also get rid of a test, since it was superseded by `__str__` in
packaging.tags.Tag.
---
 src/pip/_internal/cache.py                | 10 +++---
 src/pip/_internal/commands/debug.py       |  3 +-
 src/pip/_internal/index/package_finder.py |  6 ++--
 src/pip/_internal/models/target_python.py |  7 +++--
 src/pip/_internal/models/wheel.py         | 13 ++++----
 src/pip/_internal/pep425tags.py           | 12 ++++---
 tests/unit/test_cache.py                  |  8 +++--
 tests/unit/test_finder.py                 |  7 +++--
 tests/unit/test_models_wheel.py           | 13 ++++----
 tests/unit/test_pep425tags.py             | 38 ++++++++++++++---------
 10 files changed, 68 insertions(+), 49 deletions(-)

diff --git a/src/pip/_internal/cache.py b/src/pip/_internal/cache.py
index 3f5a78299fa..c0e002c414e 100644
--- a/src/pip/_internal/cache.py
+++ b/src/pip/_internal/cache.py
@@ -22,8 +22,10 @@
 
 if MYPY_CHECK_RUNNING:
     from typing import Optional, Set, List, Any, Dict
+
+    from pip._vendor.packaging.tags import Tag
+
     from pip._internal.models.format_control import FormatControl
-    from pip._internal.pep425tags import Pep425Tag
 
 logger = logging.getLogger(__name__)
 
@@ -161,7 +163,7 @@ def get(
         self,
         link,            # type: Link
         package_name,    # type: Optional[str]
-        supported_tags,  # type: List[Pep425Tag]
+        supported_tags,  # type: List[Tag]
     ):
         # type: (...) -> Link
         """Returns a link to a cached item if it exists, otherwise returns the
@@ -214,7 +216,7 @@ def get(
         self,
         link,            # type: Link
         package_name,    # type: Optional[str]
-        supported_tags,  # type: List[Pep425Tag]
+        supported_tags,  # type: List[Tag]
     ):
         # type: (...) -> Link
         candidates = []
@@ -304,7 +306,7 @@ def get(
         self,
         link,            # type: Link
         package_name,    # type: Optional[str]
-        supported_tags,  # type: List[Pep425Tag]
+        supported_tags,  # type: List[Tag]
     ):
         # type: (...) -> Link
         retval = self._wheel_cache.get(
diff --git a/src/pip/_internal/commands/debug.py b/src/pip/_internal/commands/debug.py
index 2a262e759eb..fe93b3a3926 100644
--- a/src/pip/_internal/commands/debug.py
+++ b/src/pip/_internal/commands/debug.py
@@ -14,7 +14,6 @@
 from pip._internal.cli.base_command import Command
 from pip._internal.cli.cmdoptions import make_target_python
 from pip._internal.cli.status_codes import SUCCESS
-from pip._internal.pep425tags import format_tag
 from pip._internal.utils.logging import indent_log
 from pip._internal.utils.misc import get_pip_version
 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
@@ -68,7 +67,7 @@ def show_tags(options):
 
     with indent_log():
         for tag in tags:
-            logger.info(format_tag(tag))
+            logger.info(str(tag))
 
         if tags_limited:
             msg = (
diff --git a/src/pip/_internal/index/package_finder.py b/src/pip/_internal/index/package_finder.py
index d9ee8b5a877..a74d78db5a6 100644
--- a/src/pip/_internal/index/package_finder.py
+++ b/src/pip/_internal/index/package_finder.py
@@ -37,11 +37,13 @@
     from typing import (
         FrozenSet, Iterable, List, Optional, Set, Text, Tuple, Union,
     )
+
+    from pip._vendor.packaging.tags import Tag
     from pip._vendor.packaging.version import _BaseVersion
+
     from pip._internal.index.collector import LinkCollector
     from pip._internal.models.search_scope import SearchScope
     from pip._internal.req import InstallRequirement
-    from pip._internal.pep425tags import Pep425Tag
     from pip._internal.utils.hashes import Hashes
 
     BuildTag = Union[Tuple[()], Tuple[int, str]]
@@ -425,7 +427,7 @@ def create(
     def __init__(
         self,
         project_name,         # type: str
-        supported_tags,       # type: List[Pep425Tag]
+        supported_tags,       # type: List[Tag]
         specifier,            # type: specifiers.BaseSpecifier
         prefer_binary=False,  # type: bool
         allow_all_prereleases=False,  # type: bool
diff --git a/src/pip/_internal/models/target_python.py b/src/pip/_internal/models/target_python.py
index cd08c917899..97ae85a0945 100644
--- a/src/pip/_internal/models/target_python.py
+++ b/src/pip/_internal/models/target_python.py
@@ -6,7 +6,8 @@
 
 if MYPY_CHECK_RUNNING:
     from typing import List, Optional, Tuple
-    from pip._internal.pep425tags import Pep425Tag
+
+    from pip._vendor.packaging.tags import Tag
 
 
 class TargetPython(object):
@@ -55,7 +56,7 @@ def __init__(
         self.py_version_info = py_version_info
 
         # This is used to cache the return value of get_tags().
-        self._valid_tags = None  # type: Optional[List[Pep425Tag]]
+        self._valid_tags = None  # type: Optional[List[Tag]]
 
     def format_given(self):
         # type: () -> str
@@ -80,7 +81,7 @@ def format_given(self):
         )
 
     def get_tags(self):
-        # type: () -> List[Pep425Tag]
+        # type: () -> List[Tag]
         """
         Return the supported PEP 425 tags to check wheel candidates against.
 
diff --git a/src/pip/_internal/models/wheel.py b/src/pip/_internal/models/wheel.py
index 4c7a8af78fa..f1e3f44c598 100644
--- a/src/pip/_internal/models/wheel.py
+++ b/src/pip/_internal/models/wheel.py
@@ -3,15 +3,14 @@
 """
 import re
 
+from pip._vendor.packaging.tags import Tag
+
 from pip._internal.exceptions import InvalidWheelFilename
-from pip._internal.pep425tags import format_tag
 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
 
 if MYPY_CHECK_RUNNING:
     from typing import List
 
-    from pip._internal.pep425tags import Pep425Tag
-
 
 class Wheel(object):
     """A wheel file"""
@@ -45,17 +44,17 @@ def __init__(self, filename):
 
         # All the tag combinations from this file
         self.file_tags = {
-            (x, y, z) for x in self.pyversions
+            Tag(x, y, z) for x in self.pyversions
             for y in self.abis for z in self.plats
         }
 
     def get_formatted_file_tags(self):
         # type: () -> List[str]
         """Return the wheel's tags as a sorted list of strings."""
-        return sorted(format_tag(tag) for tag in self.file_tags)
+        return sorted(str(tag) for tag in self.file_tags)
 
     def support_index_min(self, tags):
-        # type: (List[Pep425Tag]) -> int
+        # type: (List[Tag]) -> int
         """Return the lowest index that one of the wheel's file_tag combinations
         achieves in the given list of supported tags.
 
@@ -71,7 +70,7 @@ def support_index_min(self, tags):
         return min(tags.index(tag) for tag in self.file_tags if tag in tags)
 
     def supported(self, tags):
-        # type: (List[Pep425Tag]) -> bool
+        # type: (List[Tag]) -> bool
         """Return whether the wheel is compatible with one of the given tags.
 
         :param tags: the PEP 425 tags to check the wheel against.
diff --git a/src/pip/_internal/pep425tags.py b/src/pip/_internal/pep425tags.py
index 841597596b2..f2e62c93896 100644
--- a/src/pip/_internal/pep425tags.py
+++ b/src/pip/_internal/pep425tags.py
@@ -9,7 +9,11 @@
 import sysconfig
 from collections import OrderedDict
 
-from pip._vendor.packaging.tags import interpreter_name, interpreter_version
+from pip._vendor.packaging.tags import (
+    Tag,
+    interpreter_name,
+    interpreter_version,
+)
 from pip._vendor.six import PY2
 
 import pip._internal.utils.glibc
@@ -20,8 +24,6 @@
         Tuple, Callable, List, Optional, Union, Dict
     )
 
-    Pep425Tag = Tuple[str, str, str]
-
 logger = logging.getLogger(__name__)
 
 _osx_arch_pat = re.compile(r'(.+)_(\d+)_(\d+)_(.+)')
@@ -365,7 +367,7 @@ def get_supported(
     impl=None,  # type: Optional[str]
     abi=None  # type: Optional[str]
 ):
-    # type: (...) -> List[Pep425Tag]
+    # type: (...) -> List[Tag]
     """Return a list of supported tags for each version specified in
     `versions`.
 
@@ -433,4 +435,4 @@ def get_supported(
     for version in other_versions:
         supported.append(('py%s' % (version,), 'none', 'any'))
 
-    return supported
+    return [Tag(*parts) for parts in supported]
diff --git a/tests/unit/test_cache.py b/tests/unit/test_cache.py
index 5d81fc01d14..1a4f98b28bd 100644
--- a/tests/unit/test_cache.py
+++ b/tests/unit/test_cache.py
@@ -1,5 +1,7 @@
 import os
 
+from pip._vendor.packaging.tags import Tag
+
 from pip._internal.cache import WheelCache, _hash_dict
 from pip._internal.models.format_control import FormatControl
 from pip._internal.models.link import Link
@@ -39,11 +41,11 @@ def test_wheel_name_filter(tmpdir):
     with open(os.path.join(cache_path, "package-1.0-py3-none-any.whl"), "w"):
         pass
     # package matches wheel name
-    cached_link = wc.get(link, "package", [("py3", "none", "any")])
+    cached_link = wc.get(link, "package", [Tag("py3", "none", "any")])
     assert cached_link is not link
     assert os.path.exists(cached_link.file_path)
     # package2 does not match wheel name
-    assert wc.get(link, "package2", [("py3", "none", "any")]) is link
+    assert wc.get(link, "package2", [Tag("py3", "none", "any")]) is link
 
 
 def test_cache_hash():
@@ -89,7 +91,7 @@ def test_get_with_legacy_entry_only(tmpdir):
     ensure_dir(legacy_path)
     with open(os.path.join(legacy_path, "test-1.0.0-py3-none-any.whl"), "w"):
         pass
-    cached_link = wc.get(link, "test", [("py3", "none", "any")])
+    cached_link = wc.get(link, "test", [Tag("py3", "none", "any")])
     assert (
         os.path.normcase(os.path.dirname(cached_link.file_path)) ==
         os.path.normcase(legacy_path)
diff --git a/tests/unit/test_finder.py b/tests/unit/test_finder.py
index b8e179c115e..fb2326c82d5 100644
--- a/tests/unit/test_finder.py
+++ b/tests/unit/test_finder.py
@@ -4,6 +4,7 @@
 import pytest
 from mock import Mock, patch
 from pip._vendor.packaging.specifiers import SpecifierSet
+from pip._vendor.packaging.tags import Tag
 from pkg_resources import parse_version
 
 import pip._internal.pep425tags
@@ -238,9 +239,9 @@ def test_link_sorting(self):
             ),
         ]
         valid_tags = [
-            ('pyT', 'none', 'TEST'),
-            ('pyT', 'TEST', 'any'),
-            ('pyT', 'none', 'any'),
+            Tag('pyT', 'none', 'TEST'),
+            Tag('pyT', 'TEST', 'any'),
+            Tag('pyT', 'none', 'any'),
         ]
         specifier = SpecifierSet()
         evaluator = CandidateEvaluator(
diff --git a/tests/unit/test_models_wheel.py b/tests/unit/test_models_wheel.py
index 8b351356d83..f74dd367954 100644
--- a/tests/unit/test_models_wheel.py
+++ b/tests/unit/test_models_wheel.py
@@ -1,4 +1,5 @@
 import pytest
+from pip._vendor.packaging.tags import Tag
 
 from pip._internal import pep425tags
 from pip._internal.exceptions import InvalidWheelFilename
@@ -54,21 +55,21 @@ def test_supported_single_version(self):
         Test single-version wheel is known to be supported
         """
         w = Wheel('simple-0.1-py2-none-any.whl')
-        assert w.supported(tags=[('py2', 'none', 'any')])
+        assert w.supported(tags=[Tag('py2', 'none', 'any')])
 
     def test_supported_multi_version(self):
         """
         Test multi-version wheel is known to be supported
         """
         w = Wheel('simple-0.1-py2.py3-none-any.whl')
-        assert w.supported(tags=[('py3', 'none', 'any')])
+        assert w.supported(tags=[Tag('py3', 'none', 'any')])
 
     def test_not_supported_version(self):
         """
         Test unsupported wheel is known to be unsupported
         """
         w = Wheel('simple-0.1-py2-none-any.whl')
-        assert not w.supported(tags=[('py1', 'none', 'any')])
+        assert not w.supported(tags=[Tag('py1', 'none', 'any')])
 
     def test_supported_osx_version(self):
         """
@@ -153,9 +154,9 @@ def test_support_index_min(self):
         Test results from `support_index_min`
         """
         tags = [
-            ('py2', 'none', 'TEST'),
-            ('py2', 'TEST', 'any'),
-            ('py2', 'none', 'any'),
+            Tag('py2', 'none', 'TEST'),
+            Tag('py2', 'TEST', 'any'),
+            Tag('py2', 'none', 'any'),
         ]
         w = Wheel('simple-0.1-py2-none-any.whl')
         assert w.support_index_min(tags=tags) == 2
diff --git a/tests/unit/test_pep425tags.py b/tests/unit/test_pep425tags.py
index b41edcc7bf5..14ea5f0ac96 100644
--- a/tests/unit/test_pep425tags.py
+++ b/tests/unit/test_pep425tags.py
@@ -98,10 +98,10 @@ def test_no_hyphen_tag(self):
                    mock_gcf):
             supported = pip._internal.pep425tags.get_supported()
 
-        for (py, abi, plat) in supported:
-            assert '-' not in py
-            assert '-' not in abi
-            assert '-' not in plat
+        for tag in supported:
+            assert '-' not in tag.interpreter
+            assert '-' not in tag.abi
+            assert '-' not in tag.platform
 
     def test_manual_abi_noflags(self):
         """
@@ -192,8 +192,10 @@ def test_manylinux1_tag_is_first(self):
         Test that the more specific tag manylinux1 comes first.
         """
         groups = {}
-        for pyimpl, abi, arch in pep425tags.get_supported():
-            groups.setdefault((pyimpl, abi), []).append(arch)
+        for tag in pep425tags.get_supported():
+            groups.setdefault(
+                (tag.interpreter, tag.abi), []
+            ).append(tag.platform)
 
         for arches in groups.values():
             if arches == ['any']:
@@ -218,8 +220,10 @@ def test_manylinux2010_tag_is_first(self):
         Test that the more specific tag manylinux2010 comes first.
         """
         groups = {}
-        for pyimpl, abi, arch in pep425tags.get_supported():
-            groups.setdefault((pyimpl, abi), []).append(arch)
+        for tag in pep425tags.get_supported():
+            groups.setdefault(
+                (tag.interpreter, tag.abi), []
+            ).append(tag.platform)
 
         for arches in groups.values():
             if arches == ['any']:
@@ -245,8 +249,10 @@ def test_manylinux2010_implies_manylinux1(self, manylinux2010, manylinux1):
         """
         groups = {}
         supported = pep425tags.get_supported(platform=manylinux2010)
-        for pyimpl, abi, arch in supported:
-            groups.setdefault((pyimpl, abi), []).append(arch)
+        for tag in supported:
+            groups.setdefault(
+                (tag.interpreter, tag.abi), []
+            ).append(tag.platform)
 
         for arches in groups.values():
             if arches == ['any']:
@@ -265,8 +271,10 @@ def test_manylinux2014_tag_is_first(self):
         Test that the more specific tag manylinux2014 comes first.
         """
         groups = {}
-        for pyimpl, abi, arch in pep425tags.get_supported():
-            groups.setdefault((pyimpl, abi), []).append(arch)
+        for tag in pep425tags.get_supported():
+            groups.setdefault(
+                (tag.interpreter, tag.abi), []
+            ).append(tag.platform)
 
         for arches in groups.values():
             if arches == ['any']:
@@ -295,8 +303,10 @@ def test_manylinuxA_implies_manylinuxB(self, manylinuxA, manylinuxB):
         """
         groups = {}
         supported = pep425tags.get_supported(platform=manylinuxA)
-        for pyimpl, abi, arch in supported:
-            groups.setdefault((pyimpl, abi), []).append(arch)
+        for tag in supported:
+            groups.setdefault(
+                (tag.interpreter, tag.abi), []
+            ).append(tag.platform)
 
         expected_arches = [manylinuxA]
         expected_arches.extend(manylinuxB)

From 58f175fdf2505d119467c78222d9736cf54dc968 Mon Sep 17 00:00:00 2001
From: Chris Hunt <chrahunt@gmail.com>
Date: Sat, 23 Nov 2019 18:02:26 -0500
Subject: [PATCH 2/2] Remove unused format_tag

Since we delegate tag formatting to packaging.tags.Tag, we don't need
this function or its tests.
---
 src/pip/_internal/pep425tags.py | 9 ---------
 tests/unit/test_pep425tags.py   | 9 ---------
 2 files changed, 18 deletions(-)

diff --git a/src/pip/_internal/pep425tags.py b/src/pip/_internal/pep425tags.py
index f2e62c93896..25c0cedd681 100644
--- a/src/pip/_internal/pep425tags.py
+++ b/src/pip/_internal/pep425tags.py
@@ -29,15 +29,6 @@
 _osx_arch_pat = re.compile(r'(.+)_(\d+)_(\d+)_(.+)')
 
 
-def format_tag(file_tag):
-    # type: (Tuple[str, ...]) -> str
-    """Format three tags in the form "<python_tag>-<abi_tag>-<platform_tag>".
-
-    :param file_tag: A 3-tuple of tags (python_tag, abi_tag, platform_tag).
-    """
-    return '-'.join(file_tag)
-
-
 def get_config_var(var):
     # type: (str) -> Optional[str]
     return sysconfig.get_config_var(var)
diff --git a/tests/unit/test_pep425tags.py b/tests/unit/test_pep425tags.py
index 14ea5f0ac96..eaa88888fb0 100644
--- a/tests/unit/test_pep425tags.py
+++ b/tests/unit/test_pep425tags.py
@@ -7,15 +7,6 @@
 from pip._internal import pep425tags
 
 
-@pytest.mark.parametrize('file_tag, expected', [
-    (('py27', 'none', 'any'), 'py27-none-any'),
-    (('cp33', 'cp32dmu', 'linux_x86_64'), 'cp33-cp32dmu-linux_x86_64'),
-])
-def test_format_tag(file_tag, expected):
-    actual = pep425tags.format_tag(file_tag)
-    assert actual == expected
-
-
 @pytest.mark.parametrize('version_info, expected', [
     ((2,), '2'),
     ((2, 8), '28'),