Add support for --pip-version 25.0. (#2652)

.github/workflows/ci.yml

@@ -74,8 +74,8 @@ jobs:
           - tox-env: py27-pip20
           - tox-env: py38-pip22_3_1
           - tox-env: py311-pip23_3_2
-          - tox-env: py313-pip24_3_1
-          - tox-env: py314-pip24_3_1
+          - tox-env: py313-pip25_0
+          - tox-env: py314-pip25_0
           - tox-env: pypy310-pip24_3_1
 
           # Integration tests, split most into two shards:
@@ -94,14 +94,14 @@ jobs:
           - tox-env: py311-pip23_3_2-integration
             pex-test-pos-args: --shard 2/2
 
-          - tox-env: py313-pip24_3_1-integration
+          - tox-env: py313-pip25_0-integration
             pex-test-pos-args: --shard 1/2
-          - tox-env: py313-pip24_3_1-integration
+          - tox-env: py313-pip25_0-integration
             pex-test-pos-args: --shard 2/2
 
-          - tox-env: py314-pip24_3_1-integration
+          - tox-env: py314-pip25_0-integration
             pex-test-pos-args: --shard 1/2
-          - tox-env: py314-pip24_3_1-integration
+          - tox-env: py314-pip25_0-integration
             pex-test-pos-args: --shard 2/2
 
           - tox-env: pypy310-pip24_3_1-integration
@@ -149,14 +149,14 @@ jobs:
       matrix:
         include:
           - python-version: [ 3, 13 ]
-            tox-env: py313-pip24_3_1
+            tox-env: py313-pip25_0
             tox-env-python: python3.11
           - python-version: [ 3, 13 ]
-            tox-env: py313-pip24_3_1-integration
+            tox-env: py313-pip25_0-integration
             tox-env-python: python3.11
             pex-test-pos-args: --shard 1/2
           - python-version: [ 3, 13 ]
-            tox-env: py313-pip24_3_1-integration
+            tox-env: py313-pip25_0-integration
             tox-env-python: python3.11
             pex-test-pos-args: --shard 2/2
     steps:

CHANGES.md

@@ -1,5 +1,11 @@
 # Release Notes
 
+## 2.32.0
+
+This release adds support for Pip 25.0.
+
+* Add support for `--pip-version 25.0`. (#2652)
+
 ## 2.31.0
 
 This release adds `pex3 lock subset <reqs...> --lock existing.lock` for

pex/pip/dependencies/requires.py

@@ -4,6 +4,7 @@
 from __future__ import absolute_import, print_function
 
 import logging
+import sys
 
 logger = logging.getLogger(__name__)
 
@@ -78,10 +79,14 @@ def patch_requires_dists(dist_type, requires_dists_function_name):
     # `pkg_resources.Distribution` objects to a `pip._internal.metadata` interface. The
     # `pip._internal.metadata.pkg_resources.Distribution` type delegates to
     # `pip._vendor.pkg_resources.Distribution`, which we've patched above, but the
-    # `pip._internal.metadata.importlib.Distribution` type needs its own patching.
-    try:
-        from pip._internal.metadata.importlib import Distribution  # type: ignore[import]
+    # `pip._internal.metadata.importlib.Distribution` type needs its own patching. N.B.: Pip only
+    # uses the pip._internal.metadata.importlib package for Python >=3.11 and code in that package
+    # relies on that fact, using some syntax not supported in earlier Python versions; so we guard
+    # this patch. See discussion here: https://github.com/pypa/pip/pull/11685/files#r1929802395
+    if sys.version_info[:2] >= (3, 11):
+        try:
+            from pip._internal.metadata.importlib import Distribution  # type: ignore[import]
 
-        patch_requires_dists(Distribution, "iter_dependencies")
-    except ImportError:
-        pass
+            patch_requires_dists(Distribution, "iter_dependencies")
+        except ImportError:
+            pass

pex/pip/foreign_platform/requires_python.py

@@ -9,8 +9,8 @@
 # N.B.: The following environment variable is used by the Pex runtime to control Pip and must be
 # kept in-sync with `__init__.py`.
 with open(os.environ.pop("_PEX_PYTHON_VERSIONS_FILE")) as fp:
-    PYTHON_FULL_VERSIONS = json.load(fp)
-PYTHON_VERSIONS = sorted(set((version[0], version[1]) for version in PYTHON_FULL_VERSIONS))
+    PYTHON_FULL_VERSIONS = sorted(tuple(version) for version in json.load(fp))
+PYTHON_VERSIONS = sorted(set(version[:2] for version in PYTHON_FULL_VERSIONS))
 
 
 def patch():

pex/pip/tool.py

@@ -374,8 +374,6 @@ def _spawn_pip_isolated(
         pip_args = [
             # We vendor the version of pip we want so pip should never check for updates.
             "--disable-pip-version-check",
-            # If we want to warn about a version of python we support, we should do it, not pip.
-            "--no-python-version-warning",
             # If pip encounters a duplicate file path during its operations we don't want it to
             # prompt and we'd also like to know about this since it should never occur. We leverage
             # the pip global option:
@@ -387,6 +385,12 @@ def _spawn_pip_isolated(
             # We are not interactive.
             "--no-input",
         ]
+        if self.version < PipVersion.v25_0:
+            # If we want to warn about a version of python we support, we should do it, not pip.
+            # That said, the option does nothing in Pip 25.0 and is deprecated and slated for
+            # removal.
+            pip_args.append("--no-python-version-warning")
+
         python_interpreter = interpreter or PythonInterpreter.get()
         pip_args.extend(
             self._calculate_resolver_version_args(

pex/pip/version.py

@@ -317,6 +317,15 @@ def values(cls):
         requires_python=">=3.8,<3.15",
     )
 
+    v25_0 = PipVersionValue(
+        version="25.0",
+        # N.B.: The setuptools 75.8.0 release was available on 1/026/2025 (the Pip 25.0 release
+        # date) but 75.3.0 is the last setuptools version to support 3.8.
+        setuptools_version="75.3.0",
+        wheel_version="0.45.1",
+        requires_python=">=3.8,<3.15",
+    )
+
     VENDORED = v20_3_4_patched
     LATEST = LatestPipVersion()
     DEFAULT = DefaultPipVersion(preferred=(VENDORED, v23_2, v24_1))

pex/version.py

@@ -1,4 +1,4 @@
 # Copyright 2015 Pex project contributors.
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
-__version__ = "2.31.0"
+__version__ = "2.32.0"

tests/integration/test_issue_1560.py

@@ -51,8 +51,12 @@ def test_build_isolation(
     touch(os.path.join(project_dir, "foo.py"))
 
     python, pip = venv_factory.create_venv()
+    # N.B.: Pip 25.0 introduces a new message to check for here.
     run_pex_command(args=[project_dir, "--no-build-isolation"], python=python).assert_failure(
-        expected_error_re=r".*ModuleNotFoundError: No module named 'flit_core'.*",
+        expected_error_re=r".*(?:{old_message}|{new_message}).*".format(
+            old_message=re.escape("ModuleNotFoundError: No module named 'flit_core'"),
+            new_message=re.escape("BackendUnavailable: Cannot import 'flit_core.buildapi'"),
+        ),
         re_flags=re.DOTALL,
     )
 

tox.ini

@@ -81,6 +81,7 @@ setenv =
     pip24_2: _PEX_PIP_VERSION=24.2
     pip24_3: _PEX_PIP_VERSION=24.3
     pip24_3_1: _PEX_PIP_VERSION=24.3.1
+    pip25_0: _PEX_PIP_VERSION=25.0
     py314: _PEX_REQUIRES_PYTHON=>=2.7,<3.15,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*
 
     # Python 3 (until a fix here in 3.9: https://bugs.python.org/issue13601) switched from stderr