Release v2025.12.1

Author: sco1

.bumper.toml

@@ -1,5 +1,5 @@
 [tool.bumper]
-current_version = "2025.12.0"
+current_version = "2025.12.1"
 versioning_type = "calver"
 
 [[tool.bumper.files]]

.pre-commit-config.yaml

@@ -3,7 +3,7 @@ ci:
 
 repos:
   - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: 25.11.0
+    rev: 25.12.0
     hooks:
       - id: black
   - repo: https://github.com/pycqa/isort

.pre-commit-hooks.yaml

@@ -4,3 +4,10 @@
   language: python
   files: '^pyproject.toml$'
   types: [toml]
+
+- id: check-eol-cached
+  name: Check supported Python EOL (cache only)
+  entry: checkeol --cache_only
+  language: python
+  files: '^pyproject.toml$'
+  types: [toml]

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Changelog
 Versions follow [Calendar Versioning](https://calver.org/) (`<YYYY>`.`<MM>`.`<MICRO>`)
 
+## [v2025.12.1]
+### Added
+* #8 Add the `check-eol-cached` hook, which utilizies only the cached EOL information and does not incorporate a date-based check
+
 ## [v2025.12.0]
 ### Fixed
 * #6 Fix EOL cache file not being included in source distribution

README.md

@@ -11,16 +11,25 @@ Add this to your `.pre-commit-config.yaml`
 
 ```yaml
 -   repo: https://github.com/sco1/pre-commit-python-eol
-    rev: v2025.12.0
+    rev: v2025.12.1
     hooks:
     - id: check-eol
+    - id: check-eol-cached
 ```
 
+While both hooks are technically compatible with each other, it's advised to choose a single hook behavior that best fits your needs.
+
+### EOL Status Cache
+To avoid requiring network connectivity at runtime, EOL status is cached to [a local JSON file](./pre_commit_python_eol/cached_release_cycle.json) distributed alongside this hook. The cache is updated quarterly & a changed cache will result in a version bump for this hook.
+
 ## Hooks
-**NOTE:** Only pyproject.toml is currently inspected. It is assumed that project metadata is specified per [PyPA Guidance](https://packaging.python.org/en/latest/guides/writing-pyproject-toml/)
+Only `pyproject.toml` is currently inspected. It is assumed that project metadata is specified per [PyPA Guidance](https://packaging.python.org/en/latest/guides/writing-pyproject-toml/)
 
 ### `check-eol`
-Check `requires-python` against the current Python lifecycle & fail if an EOL version is included.
+Check `requires-python` against the current Python lifecycle & fail if an EOL version is included; this includes a date-based check using the system's time for versions that have not yet explicitly been declared EOL.
+
+### `check-eol-cached`
+Check `requires-python` against the current Python lifecycle & fail if an EOL version is included; this hook utilizes only the cached release cycle information.
 
 ## Python Version Support
 Starting with Python 3.11, a best attempt is made to support Python versions until they reach EOL, after which support will be formally dropped by the next minor or major release of this package, whichever arrives first. The status of Python versions can be found [here](https://devguide.python.org/versions/).

pre_commit_python_eol/__init__.py

@@ -1,2 +1,2 @@
-__version__ = "2025.12.0"
+__version__ = "2025.12.1"
 __url__ = "https://github.com/sco1/pre-commit-check-eol"

pre_commit_python_eol/check_eol.py

@@ -81,6 +81,23 @@ def from_json(cls, ver: str, metadata: dict[str, t.Any]) -> PythonRelease:
             end_of_life=_parse_eol_date(metadata["end_of_life"]),
         )
 
+    def is_eol(self, use_system_date: bool) -> bool:
+        """
+        Check if this version is end-of-life.
+
+        If `use_system_date` is `True`, an additional date-based check is performed for versions
+        that are not explicitly EOL.
+        """
+        if self.status == ReleasePhase.EOL:
+            return True
+
+        if use_system_date:
+            utc_today = dt.datetime.now(dt.timezone.utc).date()
+            if self.end_of_life <= utc_today:
+                return True
+
+        return False
+
 
 def _get_cached_release_cycle(cache_json: Path) -> list[PythonRelease]:
     """
@@ -100,12 +117,17 @@ def _get_cached_release_cycle(cache_json: Path) -> list[PythonRelease]:
     )
 
 
-def check_python_support(toml_file: Path, cache_json: Path = CACHED_RELEASE_CYCLE) -> None:
+def check_python_support(
+    toml_file: Path, cache_json: Path = CACHED_RELEASE_CYCLE, use_system_date: bool = True
+) -> None:
     """
     Check the input TOML's `requires-python` for overlap with EOL Python version(s).
 
     If overlap(s) are present, an exception is raised whose message enumerates all EOL Python
     versions supported by the TOML file.
+
+    If `use_system_date` is `True`, an additional date-based check is performed for versions that
+    are not explicitly EOL.
     """
     with toml_file.open("rb") as f:
         contents = tomllib.load(f)
@@ -116,18 +138,10 @@ def check_python_support(toml_file: Path, cache_json: Path = CACHED_RELEASE_CYCL
 
     package_spec = specifiers.SpecifierSet(requires_python)
     release_cycle = _get_cached_release_cycle(cache_json)
-    utc_today = dt.datetime.now(dt.timezone.utc).date()
-
-    eol_supported = []
-    for r in release_cycle:
-        if r.python_ver in package_spec:
-            if r.status == ReleasePhase.EOL:
-                eol_supported.append(r)
-                continue
 
-            if r.end_of_life <= utc_today:
-                eol_supported.append(r)
-                continue
+    eol_supported = [
+        r for r in release_cycle if ((r.python_ver in package_spec) and r.is_eol(use_system_date))
+    ]
 
     if eol_supported:
         eol_supported.sort(key=attrgetter("python_ver"))  # Sort ascending for error msg generation
@@ -138,12 +152,13 @@ def check_python_support(toml_file: Path, cache_json: Path = CACHED_RELEASE_CYCL
 def main(argv: abc.Sequence[str] | None = None) -> int:  # noqa: D103
     parser = argparse.ArgumentParser()
     parser.add_argument("filenames", nargs="*", type=Path)
+    parser.add_argument("--cache_only", action="store_true")
     args = parser.parse_args(argv)
 
     ec = 0
     for file in args.filenames:
         try:
-            check_python_support(file)
+            check_python_support(file, use_system_date=(not args.cache_only))
         except EOLPythonError as e:
             print(f"{file}: {e}")
             ec = 1

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "pre-commit-python-eol"
-version = "2025.12.0"
+version = "2025.12.1"
 description = "A pre-commit hook for enforcing supported Python EOL"
 license = "MIT"
 license-files = ["LICENSE"]

tests/test_check_eol.py

@@ -213,3 +213,45 @@ def test_check_python_support_multi_eol_raises(path_with_cache: tuple[Path, Path
             check_python_support(pyproject, cache_json=cache_path)
 
     assert str(e.value).endswith("3.7, 3.8")
+
+
+def test_check_cached_python_support_single_eol_no_raises_by_date(
+    path_with_cache: tuple[Path, Path],
+) -> None:
+    base_path, cache_path = path_with_cache
+    pyproject = base_path / "pyproject.toml"
+    pyproject.write_text(SAMPLE_PYPROJECT_SINGLE_EOL_BY_DATE)
+
+    with time_machine.travel(dt.date(year=2031, month=11, day=1)):
+        check_python_support(
+            pyproject,
+            cache_json=cache_path,
+            use_system_date=False,
+        )
+
+
+def test_check_cached_python_support_no_eol(path_with_cache: tuple[Path, Path]) -> None:
+    base_path, cache_path = path_with_cache
+    pyproject = base_path / "pyproject.toml"
+    pyproject.write_text(SAMPLE_PYPROJECT_NO_EOL)
+
+    check_python_support(
+        pyproject,
+        cache_json=cache_path,
+        use_system_date=False,
+    )
+
+
+def test_check_cached_python_support_single_eol_raises(path_with_cache: tuple[Path, Path]) -> None:
+    base_path, cache_path = path_with_cache
+    pyproject = base_path / "pyproject.toml"
+    pyproject.write_text(SAMPLE_PYPROJECT_SINGLE_EOL)
+
+    with pytest.raises(EOLPythonError) as e:
+        check_python_support(
+            pyproject,
+            cache_json=cache_path,
+            use_system_date=False,
+        )
+
+    assert str(e.value).endswith("3.8")