| # Specify analysis options. |
| # |
| # For a list of lints, see: https://dart.dev/tools/linter-rules |
| # For guidelines on configuring static analysis, see: |
| # https://dart.dev/tools/analysis |
| # |
| # There are other similar analysis options files in the flutter repos, |
| # which should be kept in sync with this file: |
| # |
| # - analysis_options.yaml (this file) |
| # - https://github.com/flutter/engine/blob/main/analysis_options.yaml |
| # - https://github.com/flutter/packages/blob/main/analysis_options.yaml |
| # |
| # This file contains the analysis options used for code in the flutter/flutter |
| # repository. |
| |
| analyzer: |
| language: |
| strict-casts: true |
| strict-inference: true |
| strict-raw-types: true |
| errors: |
| # allow deprecated members (we do this because otherwise we have to annotate |
| # every member in every test, assert, etc, when we or the Dart SDK deprecates |
| # something (https://github.com/flutter/flutter/issues/143312) |
| deprecated_member_use: ignore |
| deprecated_member_use_from_same_package: ignore |
| exclude: |
| - "bin/cache/**" |
| # Ignore protoc generated files |
| - "dev/conductor/lib/proto/*" |
| - "engine/**" |
| |
| formatter: |
| page_width: 100 |
| |
| linter: |
| rules: |
| # This list is derived from the list of all available lints located at |
| # https://github.com/dart-lang/sdk/blob/main/pkg/linter/example/all.yaml |
| - always_declare_return_types |
| - always_put_control_body_on_new_line |
| # - always_put_required_named_parameters_first # we prefer having parameters in the same order as fields https://github.com/flutter/flutter/issues/10219 |
| - always_specify_types |
| # - always_use_package_imports # we do this commonly |
| - annotate_overrides |
| - annotate_redeclares |
| # - avoid_annotating_with_dynamic # conflicts with always_specify_types |
| - avoid_bool_literals_in_conditional_expressions |
| # - avoid_catches_without_on_clauses # blocked on https://github.com/dart-lang/linter/issues/3023 |
| # - avoid_catching_errors # blocked on https://github.com/dart-lang/linter/issues/4998 |
| # - avoid_classes_with_only_static_members # we do this commonly for `abstract final class`es |
| - avoid_double_and_int_checks |
| - avoid_dynamic_calls |
| - avoid_empty_else |
| - avoid_equals_and_hash_code_on_mutable_classes |
| - avoid_escaping_inner_quotes |
| - avoid_field_initializers_in_const_classes |
| # - avoid_final_parameters # incompatible with prefer_final_parameters |
| - avoid_function_literals_in_foreach_calls |
| # - avoid_implementing_value_types # see https://github.com/dart-lang/linter/issues/4558 |
| - avoid_init_to_null |
| - avoid_js_rounded_ints |
| # - avoid_multiple_declarations_per_line # seems to be a stylistic choice we don't subscribe to |
| - avoid_null_checks_in_equality_operators |
| # - avoid_positional_boolean_parameters # would have been nice to enable this but by now there's too many places that break it |
| - avoid_print |
| # - avoid_private_typedef_functions # we prefer having typedef (discussion in https://github.com/flutter/flutter/pull/16356) |
| - avoid_redundant_argument_values |
| - avoid_relative_lib_imports |
| - avoid_renaming_method_parameters |
| - avoid_return_types_on_setters |
| - avoid_returning_null_for_void |
| # - avoid_returning_this # there are enough valid reasons to return `this` that this lint ends up with too many false positives |
| - avoid_setters_without_getters |
| - avoid_shadowing_type_parameters |
| - avoid_single_cascade_in_expression_statements |
| - avoid_slow_async_io |
| - avoid_type_to_string |
| - avoid_types_as_parameter_names |
| # - avoid_types_on_closure_parameters # conflicts with always_specify_types |
| - avoid_unnecessary_containers |
| - avoid_unused_constructor_parameters |
| - avoid_void_async |
| # - avoid_web_libraries_in_flutter # we use web libraries in web-specific code, and our tests prevent us from using them elsewhere |
| - await_only_futures |
| - camel_case_extensions |
| - camel_case_types |
| - cancel_subscriptions |
| # - cascade_invocations # doesn't match the typical style of this repo |
| - cast_nullable_to_non_nullable |
| # - close_sinks # not reliable enough |
| - collection_methods_unrelated_type |
| - combinators_ordering |
| # - comment_references # blocked on https://github.com/dart-lang/linter/issues/1142 |
| - conditional_uri_does_not_exist |
| # - constant_identifier_names # needs an opt-out https://github.com/dart-lang/linter/issues/204 |
| - control_flow_in_finally |
| - curly_braces_in_flow_control_structures |
| - dangling_library_doc_comments |
| - depend_on_referenced_packages |
| - deprecated_consistency |
| # - deprecated_member_use_from_same_package # we allow self-references to deprecated members |
| # - diagnostic_describe_all_properties # enabled only at the framework level (packages/flutter/lib) |
| - directives_ordering |
| # - discarded_futures # too many false positives, similar to unawaited_futures |
| # - do_not_use_environment # there are appropriate times to use the environment, especially in our tests and build logic |
| # - document_ignores # not yet tested |
| - empty_catches |
| - empty_constructor_bodies |
| - empty_statements |
| - eol_at_end_of_file |
| - exhaustive_cases |
| - file_names |
| - flutter_style_todos |
| - hash_and_equals |
| - implementation_imports |
| - implicit_call_tearoffs |
| - implicit_reopen |
| - invalid_case_patterns |
| - invalid_runtime_check_with_js_interop_types |
| # - join_return_with_assignment # not required by flutter style |
| - leading_newlines_in_multiline_strings |
| - library_annotations |
| - library_names |
| - library_prefixes |
| - library_private_types_in_public_api |
| # - lines_longer_than_80_chars # not required by flutter style |
| - literal_only_boolean_expressions |
| # - matching_super_parameters # blocked on https://github.com/dart-lang/language/issues/2509 |
| - missing_code_block_language_in_doc_comment |
| - missing_whitespace_between_adjacent_strings |
| - no_adjacent_strings_in_list |
| - no_default_cases |
| - no_duplicate_case_values |
| - no_leading_underscores_for_library_prefixes |
| - no_leading_underscores_for_local_identifiers |
| - no_literal_bool_comparisons |
| - no_logic_in_create_state |
| # - no_runtimeType_toString # ok in tests; we enable this only in packages/ |
| - no_self_assignments |
| - no_wildcard_variable_uses |
| - non_constant_identifier_names |
| - noop_primitive_operations |
| - null_check_on_nullable_type_parameter |
| - null_closures |
| # - omit_local_variable_types # opposite of always_specify_types |
| # - omit_obvious_local_variable_types # not yet tested |
| # - one_member_abstracts # too many false positives |
| - only_throw_errors # this does get disabled in a few places where we have legacy code that uses strings et al |
| - overridden_fields |
| # - package_api_docs # Deprecated (https://github.com/dart-lang/linter/issues/5107) |
| - package_names |
| - package_prefixed_library_names |
| # - parameter_assignments # we do this commonly |
| - prefer_adjacent_string_concatenation |
| - prefer_asserts_in_initializer_lists |
| # - prefer_asserts_with_message # not required by flutter style |
| - prefer_collection_literals |
| - prefer_conditional_assignment |
| - prefer_const_constructors |
| - prefer_const_constructors_in_immutables |
| - prefer_const_declarations |
| - prefer_const_literals_to_create_immutables |
| # - prefer_constructors_over_static_methods # far too many false positives |
| - prefer_contains |
| # - prefer_double_quotes # opposite of prefer_single_quotes |
| # - prefer_expression_function_bodies # conflicts with ./docs/contributing/Style-guide-for-Flutter-repo.md#consider-using--for-short-functions-and-methods |
| - prefer_final_fields |
| - prefer_final_in_for_each |
| - prefer_final_locals |
| # - prefer_final_parameters # adds too much verbosity |
| - prefer_for_elements_to_map_fromIterable |
| - prefer_foreach |
| - prefer_function_declarations_over_variables |
| - prefer_generic_function_type_aliases |
| - prefer_if_elements_to_conditional_expressions |
| - prefer_if_null_operators |
| - prefer_initializing_formals |
| - prefer_inlined_adds |
| # - prefer_int_literals # conflicts with ./docs/contributing/Style-guide-for-Flutter-repo.md#use-double-literals-for-double-constants |
| - prefer_interpolation_to_compose_strings |
| - prefer_is_empty |
| - prefer_is_not_empty |
| - prefer_is_not_operator |
| - prefer_iterable_whereType |
| - prefer_mixin |
| # - prefer_null_aware_method_calls # "call()" is confusing to people new to the language since it's not documented anywhere |
| - prefer_null_aware_operators |
| - prefer_relative_imports |
| - prefer_single_quotes |
| - prefer_spread_collections |
| - prefer_typing_uninitialized_variables |
| - prefer_void_to_null |
| - provide_deprecation_message |
| # - public_member_api_docs # enabled on a case-by-case basis; see e.g. packages/analysis_options.yaml |
| - recursive_getters |
| # - require_trailing_commas # would be nice, but requires a lot of manual work: 10,000+ code locations would need to be reformatted by hand after bulk fix is applied |
| - secure_pubspec_urls |
| - sized_box_for_whitespace |
| - sized_box_shrink_expand |
| - slash_for_doc_comments |
| - sort_child_properties_last |
| - sort_constructors_first |
| # - sort_pub_dependencies # prevents separating pinned transitive dependencies |
| - sort_unnamed_constructors_first |
| # - specify_nonobvious_local_variable_types # not yet tested |
| - test_types_in_equals |
| - throw_in_finally |
| - tighten_type_of_initializing_formals |
| # - type_annotate_public_apis # subset of always_specify_types |
| - type_init_formals |
| - type_literal_in_constant_pattern |
| # - unawaited_futures # too many false positives, especially with the way AnimationController works |
| # - unintended_html_in_doc_comment # blocked on https://github.com/dart-lang/linter/issues/5065 |
| - unnecessary_await_in_return |
| - unnecessary_brace_in_string_interps |
| - unnecessary_breaks |
| - unnecessary_const |
| - unnecessary_constructor_name |
| # - unnecessary_final # conflicts with prefer_final_locals |
| - unnecessary_getters_setters |
| # - unnecessary_lambdas # has false positives: https://github.com/dart-lang/linter/issues/498 |
| - unnecessary_late |
| - unnecessary_library_directive |
| # - unnecessary_library_name # blocked on https://github.com/dart-lang/dartdoc/issues/3882 |
| - unnecessary_new |
| - unnecessary_null_aware_assignments |
| - unnecessary_null_aware_operator_on_extension_on_nullable |
| - unnecessary_null_checks |
| - unnecessary_null_in_if_null_operators |
| - unnecessary_nullable_for_final_variable_declarations |
| - unnecessary_overrides |
| - unnecessary_parenthesis |
| # - unnecessary_raw_strings # what's "necessary" is a matter of opinion; consistency across strings can help readability more than this lint |
| - unnecessary_statements |
| - unnecessary_string_escapes |
| - unnecessary_string_interpolations |
| - unnecessary_this |
| - unnecessary_to_list_in_spreads |
| - unreachable_from_main |
| - unrelated_type_equality_checks |
| - use_build_context_synchronously |
| - use_colored_box |
| # - use_decorated_box # leads to bugs: DecoratedBox and Container are not equivalent (Container inserts extra padding) |
| - use_enums |
| - use_full_hex_values_for_flutter_colors |
| - use_function_type_syntax_for_parameters |
| - use_if_null_to_convert_nulls_to_bools |
| - use_is_even_rather_than_modulo |
| - use_key_in_widget_constructors |
| - use_late_for_private_fields_and_variables |
| - use_named_constants |
| - use_raw_strings |
| - use_rethrow_when_possible |
| - use_setters_to_change_properties |
| # - use_string_buffers # has false positives: https://github.com/dart-lang/sdk/issues/34182 |
| - use_string_in_part_of_directives |
| - use_super_parameters |
| - use_test_throws_matchers |
| # - use_to_and_as_if_applicable # has false positives, so we prefer to catch this by code-review |
| - use_truncating_division |
| - valid_regexps |
| - void_checks |
