Document Python 3.15 support and 0.13.21 vendorized upgrades - #98
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Adds the 0.13.21 release notes covering Python 3.15 support, the PEP 451 loader fix, the `packaging` 26.3 `Requirement.__slots__` fix, the removal of pre-3.10 compatibility workarounds and the vendorized dependency bumps. Bumps the supported version range on the front page to 3.10 through 3.15.
Cloudflare-style bot protection now answers htmlproofer's requests to both hosts with 403, failing every build regardless of the change under test. Scoped to those two hosts via --ignore-urls rather than adding 403 to --ignore-status-codes, so a genuinely forbidden link anywhere else still fails the build. The patterns require a path separator after the host so that lookalike domains are not silently skipped.
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… dependencies [release] (#948) Releases 0.13.21. ## Python 3.15 support Python 3.15 removed the legacy `load_module()` fallback from the import machinery, so meta path loaders must implement the PEP 451 `create_module()`/`exec_module()` protocol. Both `VendorImporter` and `CoverageImporter` failed at import time without it: ``` AttributeError: 'VendorImporter' object has no attribute 'exec_module' ``` There is a subtlety beyond simply adding the two methods. `module_from_spec()` unconditionally overwrites `__spec__` on whatever `create_module()` returns, so returning the vendored module directly replaces its real spec with the alias spec — which has no origin and a loader unable to locate resources. That surfaced as a second failure: ``` FileNotFoundError: Can't open orphan path (importlib/resources/_adapters.py:139) ``` when virtualenv looked up its own embedded payload. Both loaders now stash the real spec in `create_module()` and restore it in `exec_module()`, preserving the pre-3.15 behaviour exactly. New regression tests (`extern_tests.py`, `coverage_shim_tests.py`) cover the alias import, submodule import, spec preservation and resource lookup. They fail without the fix on 3.10, 3.14 and 3.15. ## Pre-3.10 workaround removal * `collections.abc` fallback in `utils` * `types.WrapperDescriptorType` et al. fallback in `remote` * `multiprocessing.semaphore_tracker` fallback in `remote` * `importlib_metadata` backport fallback in `pip_common` * 3.8-only `find_distributions` wrapper in `extern` * hand-rolled `NodeVisitor` computing `end_lineno` in `vendorize` * `pybuilder_venv.version >= (3, 3)` gate in `sphinx` * `py2`/`py3` branching in the scaffolded `setup.py` * `from __future__ import unicode_literals` in `pep517` * Python 2 residue in `python_utils` * version guards in the unit and integration tests The `datetime.UTC` and `unittest.case._addError` fallbacks are retained — both landed in 3.11, so 3.10 still needs them. ## Vendorized dependencies Vendorized at Python 3.10, the minimum supported version, and verified at 3.15. * virtualenv 20.36.1 to 21.7.4, which moves interpreter discovery into a separate `python-discovery` package and drops the `click` dependency * importlib-metadata 8.7.1 to 9.0.0 * packaging 26.0 to 26.3 * importlib-resources 6.5.2 to 7.1.0 * rich 14.3.2 to 15.0.0 * wheel 0.46.3 to 0.48.0 * setuptools to 84.0.0 * virtualenv's embedded seed wheels: pip 25.0.1/25.3 to 26.0.1/26.2.1 and setuptools 75.3.2/80.9.0 to 82.0.1/84.0.0 Two changes were required to accommodate the new versions: * `python_discovery` reads its own version from package metadata at import time, so its dist-info has to survive the vendorize cleanup. Added to `vendorize_preserve_metadata`. * `packaging` 26.3 gave `Requirement` a `__slots__` layout, so the pkg_resources-style `project_name` attribute PyBuilder attached to requirements can no longer be set. Requirement names now come from `Requirement.name`. ## CI `3.15-dev` on the primary and secondary matrices, `3.15t-dev` on the experimental one. Homebrew builds now skip `-dev` versions, which have no Homebrew formula yet. ## Verification Full build green locally at 3.15 (687 unit tests, 56 integration tests) both before and after the vendorize bump. The rest of the range is exercised by this PR's matrix. Documentation accompanies this in pybuilder/pybuilder.github.io#98.
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Accompanies pybuilder/pybuilder#948.
Release notes — adds the 0.13.21 section covering:
coverageon 3.15packaging26.3Requirement.__slots__fixFront page — bumps the supported range to Python 3.10 through 3.15 and adds 3.15 to the tested-versions list.
No announcement post yet, since 0.13.21 has not been cut.