[pylint/ruff] Activate PLR / PLC messages in ruff

Author: Pierre-Sassoulas

pyproject.toml

@@ -102,7 +102,9 @@ lint.select = [
     "I",       # isort
     "PGH004",  # pygrep-hooks - Use specific rule codes when using noqa
     "PIE",     # flake8-pie
+    "PLC",     # pylint convention
     "PLE",     # pylint error
+    "PLR",     # pylint refactor
     "PLR1714", # Consider merging multiple comparisons
     "PLW",     # pylint warning
     "PYI",     # flake8-pyi
@@ -139,6 +141,17 @@ lint.ignore = [
     # what we're doing when we use type(..) is ...
     "E721", # Do not compare types, use `isinstance()`
     # pylint ignore
+    "PLC0105", # `TypeVar` name "E" does not reflect its covariance;
+    "PLC0414", # Import alias does not rename original package
+    "PLR0124", # Name compared with itself
+    "PLR0133", # Two constants compared in a comparison (lots of those in tests)
+    "PLR0402", # Use `from x.y import z` in lieu of alias
+    "PLR0911", # Too many return statements
+    "PLR0912", # Too many branches
+    "PLR0913", # Too many arguments in function definition
+    "PLR0915", # Too many statements
+    "PLR2004", # Magic value used in comparison
+    "PLR2044", # Line with empty comment
     "PLR5501", # Use `elif` instead of `else` then `if`
     "PLW0120", # remove the else and dedent its contents
     "PLW0603", # Using the global statement
@@ -191,24 +204,27 @@ disable = [
     "broad-exception-caught",
     "broad-exception-raised",
     "cell-var-from-loop",                     # B023 from ruff / flake8-bugbear
-    "comparison-of-constants",
+    "comparison-of-constants",                # disabled in ruff (PLR0133)
     "comparison-with-callable",
-    "comparison-with-itself",
+    "comparison-with-itself",                 # PLR0124 from ruff
     "condition-evals-to-constant",
     "consider-using-dict-items",
     "consider-using-from-import",
     "consider-using-f-string",
     "consider-using-in",
     "consider-using-ternary",
     "consider-using-with",
+    "consider-using-from-import",             # not activated by default, PLR0402 disabled in ruff
     "cyclic-import",
     "disallowed-name",                        # foo / bar are used often in tests
     "duplicate-code",
+    "else-if-used",                           # not activated by default, PLR5501 disabled in ruff
+    "empty-comment",                          # not activated by default, PLR2044 disabled in ruff
     "eval-used",
     "exec-used",
     "expression-not-assigned",
     "fixme",
-    "global-statement",
+    "global-statement",                       # PLW0603 disabled in ruff
     "import-error",
     "import-outside-toplevel",
     "inconsistent-return-statements",
@@ -218,6 +234,7 @@ disable = [
     "invalid-str-returned",
     "keyword-arg-before-vararg",
     "line-too-long",
+    "magic-value-comparison",                 # not activated by default, PLR2004 disabled in ruff
     "method-hidden",
     "missing-docstring",
     "missing-timeout",
@@ -232,14 +249,15 @@ disable = [
     "no-self-argument",
     "not-an-iterable",
     "not-callable",
-    "pointless-exception-statement",
-    "pointless-statement",
-    "pointless-string-statement",
+    "pointless-exception-statement",          # https://github.com/pytest-dev/pytest/pull/12379
+    "pointless-statement",                    # https://github.com/pytest-dev/pytest/pull/12379
+    "pointless-string-statement",             # https://github.com/pytest-dev/pytest/pull/12379
     "possibly-used-before-assignment",
     "protected-access",
     "raise-missing-from",
     "redefined-argument-from-local",
     "redefined-builtin",
+    "redefined-loop-name",                    # PLW2901 disabled in ruff
     "redefined-outer-name",
     "reimported",
     "simplifiable-condition",
@@ -249,18 +267,18 @@ disable = [
     "super-init-not-called",
     "too-few-public-methods",
     "too-many-ancestors",
-    "too-many-arguments",
-    "too-many-branches",
+    "too-many-arguments",                     # disabled in ruff
+    "too-many-branches",                      # disabled in ruff
     "too-many-function-args",
     "too-many-instance-attributes",
     "too-many-lines",
     "too-many-locals",
     "too-many-nested-blocks",
     "too-many-public-methods",
-    "too-many-return-statements",
-    "too-many-statements",
+    "too-many-return-statements",             # disabled in ruff
+    "too-many-statements",                    # disabled in ruff
     "try-except-raise",
-    "typevar-name-incorrect-variance",
+    "typevar-name-incorrect-variance",        # PLC0105 disabled in ruff
     "unbalanced-tuple-unpacking",
     "undefined-loop-variable",
     "undefined-variable",
@@ -280,7 +298,7 @@ disable = [
     "use-dict-literal",
     "use-implicit-booleaness-not-comparison",
     "use-implicit-booleaness-not-len",
-    "useless-else-on-loop",
+    "useless-else-on-loop",                   # PLC0414 disabled in ruff
     "useless-import-alias",
     "useless-return",
     "using-constant-test",

src/_pytest/helpconfig.py

@@ -238,7 +238,6 @@ def showhelp(config: Config) -> None:
 
     for warningreport in reporter.stats.get("warnings", []):
         tw.line("warning : " + warningreport.message, red=True)
-    return
 
 
 conftest_options = [("pytest_plugins", "list of plugin names to load")]