chore: pin CI black to the pre-commit rev and stop Dependabot bumping it by hampsterx · Pull Request #21 · hampsterx/snowflake-sql-api

hampsterx · 2026-10-19T00:49:08Z

Summary

Keeps CI's black --check and the pre-commit hook on the same black, so a file the hook
formats passes CI.

The [dev] black bound is meant to match the hook's pinned rev (25.9.0). Dependabot walked
it from <25.10 to <26.11 over three PRs, and the py3.12 lint job has run black 26.x since.
The two disagree on one call in tests/test_import_footprint.py: it was committed in 25.9
style through the hook, failed CI under 26.x, and was reformatted to 26 style, which the hook
now rewrites back.

[dev] black back to >=24.0,<25.10, matching the hook rev
tests/test_import_footprint.py takes 25.9's formatting of that call (no AST change)
Dependabot ignores black (name-only: an update-types ignore is computed from the first
X.Y.Z in the requirement, and >=24.0,<25.10 has none, so it would match nothing); the cap
and the hook rev move together by hand. A name-only ignore does not block security updates.
Black's security fixes since 25.9.0 (CVE-2026-31900, CVE-2026-32274) need Python 3.10+, so
taking one is a decision about the 3.9 floor. Neither is reachable here: no workflow uses
the black action and nothing passes --python-cell-magics
Comments corrected: 25.11.0 is the last black on Python 3.9, so the cap stays at or below
25.12 while 3.9 is supported; the pre-commit header no longer says every hook rev tracks a
[dev] floor

Review

External (Codex, gpt-6.1-sol) on 1aa4509, then each fix commit re-reviewed on its own
delta (0ea6c30, d700811, fabc92c): 1 applied (the update-types ignore matched nothing
on the range cap, reverted to name-only in d700811), last two rounds clean.
Analysis pass on 0ea6c30: APPROVE, 2 applied (d700811); re-run on d700811: APPROVE,
1 applied (fabc92c).
Analysis pass: not run on the pushed tree (fabc92c, a three-line comment reword in
.github/dependabot.yml landed after the re-run; Codex reviewed it, parsed YAML unchanged).
Deferred from the analysis pass:
- mention .pre-commit-config.yaml:8: ruff has the same hook/CI split (hook v0.15.17,
  ruff>=0.4 resolves 0.17.x in CI); both pass on this tree today (mention)
- mention: nothing tests that the hook's black rev satisfies the [dev] black specifier
  (mention)
- minor pyproject.toml:49: pin black==25.9.0 instead of the <25.10 cap (declined:
  keeps the cap this change set out to restore)

Changes

 .github/dependabot.yml         | 11 +++++++++++
 .pre-commit-config.yaml        | 10 ++++++----
 pyproject.toml                 |  9 ++++++---
 tests/test_import_footprint.py |  4 +++-
 4 files changed, 26 insertions(+), 8 deletions(-)

Test plan

Fresh pip install -e '.[dev]' resolves black 25.9.0 (py3.12; uv pip compile gives
25.9.0 on 3.9, 3.10 and 3.13)
pre-commit run --all-files clean
coverage run -m pytest: 191 passed, 5 skipped, 94% coverage
black 26.10.1 --check fails only on tests/test_import_footprint.py (the split this fixes)
CI green on this PR

Summary by CodeRabbit

Chores
- Capped the development version of Black to maintain compatibility with Python 3.9 and keep formatting checks consistent.
- Updated dependency update settings so routine updates skip Black while security updates remain available.
- Clarified the version constraints for Black and other pre-commit hooks.

The [dev] black bound is meant to match the black rev the pre-commit hook pins (25.9.0), so CI's `black --check` and the local hook format the same way. Three Dependabot bumps walked it from <25.10 to <26.11, and CI (py3.12) has been running black 26.x since. The two disagree: test_import_footprint.py was committed in 25.9 style through the hook, failed CI under 26.x, and was reformatted to 26 style, which the hook now rewrites back. Restore the bound to <25.10, take the 25.9 formatting of that one call, and add a Dependabot ignore for black so the cap moves only with the hook rev, by hand. The comments now say why the cap is where it is: 25.11.0 is the last black that runs on Python 3.9, so 25.12 is the ceiling while 3.9 is supported.

Scope the black ignore to semver version updates, so routine bumps stay off while a security update can still open a PR.

An update-types ignore needs the dependency's current version, and the [dev] cap is a range with none, so the scoped ignore matched nothing and cap bumps would have kept coming. A name-only ignore blocks every version update and leaves security updates alone, so return to it and say why. Also correct the pre-commit header, which said every hook rev tracks a [dev] floor: black tracks the cap, and ruff tracks nothing.

An update-types ignore is computed from the first X.Y.Z version in the requirement string. The cap has none, which is why the typed form matched nothing; a range written with a three-part floor would not have that problem, so the comment should not blame ranges in general.

coderabbitai · 2026-10-19T00:49:25Z

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.github/dependabot.yml

📝 Walkthrough

The Black development dependency cap changes, and related comments and Dependabot configuration describe its version handling. The import-footprint test’s .format() call is reformatted without changing its behavior.

Changes: Black version coordination

Layer / File(s)	Summary
Black version handling `.github/dependabot.yml`, `.pre-commit-config.yaml`, `pyproject.toml`	The Black development dependency cap changes from `<26.11` to `<25.10`. Comments describe its relationship to the pre-commit revision and Dependabot ignore.
Import-footprint test formatting `tests/test_import_footprint.py`	The `_LEAK_SCRIPT` `.format()` call is reformatted. It still supplies `FORBIDDEN_ON_BARE_IMPORT` as `forbidden`.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: 🔵 Low · up to fabc9

The Black ignore may prevent automatic security-update pull requests, although this repository’s update settings and exposure to an applicable vulnerability are not established. This is a bounded monitoring risk; the supplied context does not establish a reason to block the PR.

Pre-merge checks: 5

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main changes: aligning the CI Black version with the pre-commit revision and preventing Dependabot from updating it.
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1 files. (3 skipped: 3 unsupported.)

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Actionable comments posted: 1

🪄 Fix comments: Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @.github/dependabot.yml:
- Line 21: Update the Dependabot ignore rule for dependency-name "black": remove
it if Black security updates must remain automatic, or document the manual
process for monitoring and applying Black security fixes if the ignore is
retained.

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.github/dependabot.yml
.pre-commit-config.yaml
pyproject.toml
tests/test_import_footprint.py

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…ate behaviour Point the comment at the code that decides it, IgnoreCondition#ignored_versions, which returns only an ignore's explicit versions for a security-update job, so a reader can check the claim where it is made.

hampsterx added 4 commits October 19, 2026 10:46

chore: keep black security updates open past the Dependabot ignore

0ea6c30

Scope the black ignore to semver version updates, so routine bumps stay off while a security update can still open a PR.

coderabbitai Bot reviewed Oct 19, 2026

View reviewed changes

Comment thread .github/dependabot.yml Resolved

hampsterx merged commit daf95ba into master Oct 19, 2026
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chore: pin CI black to the pre-commit rev and stop Dependabot bumping it - #21

chore: pin CI black to the pre-commit rev and stop Dependabot bumping it#21
hampsterx merged 5 commits into
masterfrom
chore/black-cap-dependabot-ignore

hampsterx commented Oct 19, 2026 •

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