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Exempt contextlib.ExitStack() for SIM115 rules #1946

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Jan 18, 2023
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Since our binding tracking is somewhat limited, I opted to favor false negatives over false positives. So, e.g., this won't trigger SIM115:

with contextlib.ExitStack():
    f = exit_stack.enter_context(open("filename"))

(Notice that exit_stack is unbound.)

The alternative strategy required us to incorrectly trigger SIM115 on this:

with contextlib.ExitStack() as exit_stack:
    exit_stack_ = exit_stack
    f = exit_stack_.enter_context(open("filename"))

Closes #1945.

@charliermarsh charliermarsh merged commit 51b917c into main Jan 18, 2023
@charliermarsh charliermarsh deleted the charlie/sim115 branch January 18, 2023 03:39
bruxisma pushed a commit to ixm-one/pytest-cmake-presets that referenced this pull request Jan 18, 2023
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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [ruff](https://togithub.com/charliermarsh/ruff) | `^0.0.224` ->
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### Release Notes

<details>
<summary>charliermarsh/ruff</summary>

###
[`v0.0.225`](https://togithub.com/charliermarsh/ruff/releases/tag/v0.0.225)

[Compare
Source](https://togithub.com/charliermarsh/ruff/compare/v0.0.224...v0.0.225)

#### What's Changed

- Define origin names & URLs within doc comments by
[@&#8203;not-my-profile](https://togithub.com/not-my-profile) in
[astral-sh/ruff#1929
- Refactor settings by
[@&#8203;not-my-profile](https://togithub.com/not-my-profile) in
[astral-sh/ruff#1930
- Allow duplicate enum values for enum.auto() by
[@&#8203;charliermarsh](https://togithub.com/charliermarsh) in
[astral-sh/ruff#1933
- Move `@functools.cache` rewrites to their own rule by
[@&#8203;charliermarsh](https://togithub.com/charliermarsh) in
[astral-sh/ruff#1938
- cli: Catch panics to tell the user to report them by
[@&#8203;not-my-profile](https://togithub.com/not-my-profile) in
[astral-sh/ruff#1928
- Avoid autofixing comma rules when --fix is not set by
[@&#8203;charliermarsh](https://togithub.com/charliermarsh) in
[astral-sh/ruff#1940
- Avoid broken autofix for `SIM103` with `elif` by
[@&#8203;charliermarsh](https://togithub.com/charliermarsh) in
[astral-sh/ruff#1944
- Implement `flake8-no-pep420` by
[@&#8203;edgarrmondragon](https://togithub.com/edgarrmondragon) in
[astral-sh/ruff#1942
- Exempt `contextlib.ExitStack()` for SIM115 rules by
[@&#8203;charliermarsh](https://togithub.com/charliermarsh) in
[astral-sh/ruff#1946
- Restrict SIM105 to try blocks with a body of one simple statement by
[@&#8203;andersk](https://togithub.com/andersk) in
[astral-sh/ruff#1948

**Full Changelog**:
astral-sh/ruff@v0.0.224...v0.0.225

</details>

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SIM115 should exempt exit_stack.enter_context(open(…))
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