Fix multi-digit version in entry point replacement

Previously, the special case to generate 'pip' and 'easy_install' entry
points with the correct Python version (e.g. 'pip3.9' on Python 3.9)
only accounted for single-digit version segments, and did not work
correctly on Python 3.10 and up. This was missed when Python 3.10 was
released because we (accidentally) generated wheels that did not need
any such replacements, but was exposed in CPython 3.11.0 since it
bundled pip 22.3 generated against Python 3.10.

news/11547.bugfix.rst

@@ -0,0 +1,3 @@
+Fix entry point generation of ``pip.X``, ``pipX.Y``, and ``easy_install-X.Y``
+to correctly account for multi-digit Python version segments (e.g. the "11"
+part 3.11).

src/pip/_internal/operations/install/wheel.py

@@ -325,7 +325,7 @@ def get_console_script_specs(console: Dict[str, str]) -> List[str]:
 
         scripts_to_generate.append(f"pip{get_major_minor_version()} = {pip_script}")
         # Delete any other versioned pip entry points
-        pip_ep = [k for k in console if re.match(r"pip(\d(\.\d)?)?$", k)]
+        pip_ep = [k for k in console if re.match(r"pip(\d+(\.\d+)?)?$", k)]
         for k in pip_ep:
             del console[k]
     easy_install_script = console.pop("easy_install", None)
@@ -340,7 +340,7 @@ def get_console_script_specs(console: Dict[str, str]) -> List[str]:
         )
         # Delete any other versioned easy_install entry points
         easy_install_ep = [
-            k for k in console if re.match(r"easy_install(-\d\.\d)?$", k)
+            k for k in console if re.match(r"easy_install(-\d+\.\d+)?$", k)
         ]
         for k in easy_install_ep:
             del console[k]

tests/unit/test_wheel.py

@@ -3,6 +3,7 @@
 import logging
 import os
 import pathlib
+import sys
 import textwrap
 from email import message_from_string
 from pathlib import Path
@@ -22,7 +23,11 @@
 from pip._internal.models.scheme import Scheme
 from pip._internal.operations.build.wheel_legacy import get_legacy_build_wheel_path
 from pip._internal.operations.install import wheel
-from pip._internal.operations.install.wheel import InstalledCSVRow, RecordPath
+from pip._internal.operations.install.wheel import (
+    InstalledCSVRow,
+    RecordPath,
+    get_console_script_specs,
+)
 from pip._internal.utils.compat import WINDOWS
 from pip._internal.utils.misc import hash_file
 from pip._internal.utils.unpacking import unpack_file
@@ -681,3 +686,31 @@ def test_rehash(self, tmpdir: Path) -> None:
         h, length = wheel.rehash(os.fspath(self.test_file))
         assert length == str(self.test_file_len)
         assert h == self.test_file_hash_encoded
+
+
+def test_get_console_script_specs_replaces_python_version(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    # Fake Python version.
+    monkeypatch.setattr(sys, "version_info", (10, 11))
+
+    entry_points = {
+        "pip": "real_pip",
+        "pip99": "whatever",
+        "pip99.88": "whatever",
+        "easy_install": "real_easy_install",
+        "easy_install-99.88": "whatever",
+        # The followings shouldn't be replaced.
+        "not_pip_or_easy_install-99": "whatever",
+        "not_pip_or_easy_install-99.88": "whatever",
+    }
+    specs = get_console_script_specs(entry_points)
+    assert specs == [
+        "pip = real_pip",
+        "pip10 = real_pip",
+        "pip10.11 = real_pip",
+        "easy_install = real_easy_install",
+        "easy_install-10.11 = real_easy_install",
+        "not_pip_or_easy_install-99 = whatever",
+        "not_pip_or_easy_install-99.88 = whatever",
+    ]