[ruff] Support Unicode dummy variable names

Author: MichaReiser

README.md

@@ -266,7 +266,7 @@ fixable = ["ALL"]
 unfixable = []
 
 # Allow unused variables when underscore-prefixed.
-dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+dummy-variable-rgx = '^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$'
 
 [format]
 # Like Black, use double quotes for strings.

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_extend_from_shared_config.snap

@@ -87,7 +87,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_no_tool.snap

@@ -89,7 +89,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_no_tool_preview_enabled.snap

@@ -91,7 +91,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_no_tool_target_version_override.snap

@@ -91,7 +91,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_pyproject_toml_above.snap

@@ -88,7 +88,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_pyproject_toml_above_with_tool.snap

@@ -89,7 +89,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_ruff_toml_above-2.snap

@@ -87,7 +87,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_ruff_toml_above.snap

@@ -87,7 +87,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_ruff_toml_no_target_fallback.snap

@@ -87,7 +87,7 @@ linter.explicit_preview_rules = false
 linter.extension = ExtensionMapping({})
 linter.allowed_confusables = []
 linter.builtins = []
-linter.dummy_variable_rgx = ^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$
+linter.dummy_variable_rgx = ^(?:_+|_\p{XID_Continue}*[\p{XID_Continue}--_])$
 linter.external = []
 linter.ignore_init_module_imports = true
 linter.logger_objects = []