Replace flake8-bugbear with Ruff

.flake8

@@ -2,6 +2,7 @@
 # Since typeshed stubs them, they can still be expected to be found in a
 # developer's venv for intellisense and reference reasons
 #     A      flake8-builtins
+#     B      flake8-bugbear
 #     D      flake8-docstrings
 #     N8     pep8-naming
 #     SIM    flake8-simplify
@@ -17,7 +18,6 @@
 #     E701   Multiple statements on one line (colon) -- disallows "..." on the same line
 
 # Some rules are considered irrelevant to stub files:
-#     B      All flake8-bugbear rules are .py-specific
 #     F401   imported but unused -- does not recognize re-exports
 #            https://github.com/PyCQA/pyflakes/issues/474
 
@@ -27,18 +27,18 @@
 #     F405   defined from star imports
 
 [flake8]
-extend-ignore = A, D, N8, SIM, RST, TYP, E301, E302, E305, E501, E701
+extend-ignore = A, B, D, N8, SIM, RST, TYP, E301, E302, E305, E501, E701
 per-file-ignores =
   *.py: E203
-  *.pyi: B, E741, F401, F403, F405
+  *.pyi: E741, F401, F403, F405
   # Since typing.pyi defines "overload" this is not recognized by Flake8 as typing.overload.
   # Unfortunately, Flake8 does not allow to "noqa" just a specific error inside the file itself.
   # https://github.com/PyCQA/flake8/issues/1079
   #     F811 redefinition of unused '...'
-  stdlib/typing.pyi: B, E741, F401, F403, F405, F811
+  stdlib/typing.pyi: E741, F401, F403, F405, F811
   # Generated protobuf files include docstrings,
   # and import some things from typing_extensions that could be imported from typing
-  *_pb2.pyi: B, E741, F401, F403, F405, Y021, Y023, Y026, Y053, Y054
+  *_pb2.pyi: E741, F401, F403, F405, Y021, Y023, Y026, Y053, Y054
 
 exclude = .venv*,.git
 noqa_require_code = true

.pre-commit-config.yaml

@@ -24,7 +24,6 @@ repos:
     hooks:
       - id: flake8
         additional_dependencies:
-          - "flake8-bugbear==24.1.17" # must match requirements-tests.txt
           - "flake8-noqa==1.4.0" # must match requirements-tests.txt
           - "flake8-pyi==24.1.0" # must match requirements-tests.txt
         types: [file]

CONTRIBUTING.md

@@ -108,7 +108,6 @@ you're free to do so. Either run the following manually...
 
 Our code is also linted using [`Flake8`](https://github.com/pycqa/flake8),
 with plugins [`flake8-pyi`](https://github.com/pycqa/flake8-pyi),
-[`flake8-bugbear`](https://github.com/PyCQA/flake8-bugbear),
 and [`flake8-noqa`](https://github.com/plinss/flake8-noqa).
 As with our other checks, running
 Flake8 before filing a PR is not required. However, if you wish to run Flake8

pyproject.toml

@@ -25,6 +25,7 @@ exclude = [
 
 [tool.ruff.lint]
 select = [
+    "B", # flake8-bugbear
     "FA", # flake8-future-annotations
     "I", # isort
     # Only enable rules that have safe autofixes:
@@ -49,6 +50,13 @@ select = [
     "UP039", # don't use parens after a class definition with no bases
 ]
 
+[tool.ruff.lint.per-file-ignores]
+"*.pyi" = [
+    # Most flake8-bugbear rules don't apply for third-party stubs like typeshed,
+    # B033 could be slightly useful but Ruff doesn't have per-file select
+    "B", # flake8-bugbear
+]
+
 [tool.ruff.lint.isort]
 split-on-trailing-comma = false
 combine-as-imports = true

pyrightconfig.testcases.json

@@ -15,7 +15,7 @@
     // See https://github.com/python/typeshed/pull/8083
     "enableTypeIgnoreComments": true,
     // If a test case uses this anti-pattern, there's likely a reason and annoying to `type: ignore`.
-    // Let flake8-bugbear flag it (B006)
+    // Let Ruff flag it (B006)
     "reportCallInDefaultInitializer": "none",
     // Too strict and not needed for type testing
     "reportMissingSuperCall": "none",

requirements-tests.txt

@@ -3,7 +3,6 @@
 # "tool.typeshed" section in pyproject.toml for additional type checkers.
 black==24.1.1            # must match .pre-commit-config.yaml
 flake8==7.0.0            # must match .pre-commit-config.yaml
-flake8-bugbear==24.1.17  # must match .pre-commit-config.yaml
 flake8-noqa==1.4.0       # must match .pre-commit-config.yaml
 flake8-pyi==24.1.0       # must match .pre-commit-config.yaml
 mypy==1.8.0

scripts/stubsabot.py

@@ -48,7 +48,7 @@ def from_cmd_arg(cls, cmd_arg: str) -> ActionLevel:
         try:
             return cls[cmd_arg]
         except KeyError:
-            raise argparse.ArgumentTypeError(f'Argument must be one of "{list(cls.__members__)}"')
+            raise argparse.ArgumentTypeError(f'Argument must be one of "{list(cls.__members__)}"') from None
 
     nothing = 0, "make no changes"
     local = 1, "make changes that affect local repo"

tests/check_consistent.py

@@ -23,7 +23,7 @@
 
 # These type checkers and linters must have exact versions in the requirements file to ensure
 # consistent CI runs.
-linters = {"black", "flake8", "flake8-bugbear", "flake8-noqa", "flake8-pyi", "ruff", "mypy", "pytype"}
+linters = {"black", "flake8", "flake8-noqa", "flake8-pyi", "ruff", "mypy", "pytype"}
 
 
 def assert_consistent_filetypes(