many_lints 0.4.0

A comprehensive collection of custom lint rules, quick fixes, and code assists for Flutter and Dart projects.

Changelog

0.4.0 - 2026-02-20

Added

Dart & Code Quality Rules

• avoid_constant_conditions rule to warn when both sides of a comparison are constants
• avoid_constant_switches rule to warn when a switch expression is a constant
• avoid_contradictory_expressions rule to detect contradictory comparisons in && chains
• avoid_duplicate_cascades rule to detect duplicate cascade sections with quick fix
• avoid_generics_shadowing rule to warn when a generic type parameter shadows a top-level declaration with quick fix
• avoid_incomplete_copy_with rule to detect copyWith methods missing constructor parameters with quick fix
• avoid_map_keys_contains rule to prefer containsKey() over .keys.contains() with quick fix
• avoid_misused_test_matchers rule to detect incompatible matcher usage
• avoid_only_rethrow rule to flag catch clauses that only rethrow with quick fix
• avoid_single_field_destructuring rule to avoid single-field destructuring with quick fix
• avoid_throw_in_catch_block rule to avoid throw inside catch blocks with quick fix
• avoid_unassigned_stream_subscriptions rule to detect unassigned stream subscriptions
• list_all_equatable_fields rule to detect Equatable subclasses with missing fields in props with quick fix
• prefer_class_destructuring rule to suggest class destructuring for repeated property accesses with quick fix
• prefer_contains rule to prefer .contains() over .indexOf() compared to -1 with quick fix
• prefer_enums_by_name rule to prefer .byName() over .firstWhere() with quick fix
• prefer_equatable_mixin rule to prefer EquatableMixin over extending Equatable with quick fix
• prefer_expect_later rule to prefer expectLater when testing Futures with quick fix
• prefer_overriding_parent_equality rule to detect missing ==/hashCode overrides with quick fix
• prefer_return_await rule to detect missing await in try-catch with quick fix
• prefer_simpler_patterns_null_check rule to prefer simpler null-check patterns in if-case expressions with quick fix
• prefer_single_widget_per_file rule to enforce one public widget per file
• prefer_test_matchers rule to prefer matchers over literals in expect()
• prefer_wildcard_pattern rule to prefer _ over Object() with quick fix
• proper_super_calls rule to enforce correct super call placement with quick fix
• use_closest_build_context rule to use the closest available BuildContext with quick fix
• use_existing_destructuring rule to use existing destructuring instead of direct access with quick fix
• use_existing_variable rule to detect duplicate initializer expressions with quick fix

Flutter Widget Rules

• always_remove_listener rule to detect listeners not removed in dispose() with quick fix
• avoid_border_all rule to prefer Border.fromBorderSide over Border.all with quick fix
• avoid_conditional_hooks rule to detect hooks called inside conditionals or loops
• avoid_expanded_as_spacer rule to prefer Spacer over Expanded with empty child with quick fix
• avoid_flexible_outside_flex rule to flag Flexible/Expanded outside Row/Column/Flex
• avoid_incorrect_image_opacity rule to use Image's opacity parameter with quick fix
• avoid_mounted_in_setstate rule to detect mounted check inside setState
• avoid_returning_widgets rule to avoid returning widgets from functions/methods
• avoid_shrink_wrap_in_lists rule to avoid shrinkWrap in ListView
• avoid_unnecessary_gesture_detector rule to flag GestureDetector with no handlers with quick fix
• avoid_unnecessary_overrides rule to detect overrides that only call super with quick fix
• avoid_unnecessary_overrides_in_state rule to detect State overrides that only call super with quick fix
• avoid_unnecessary_setstate rule to detect unnecessary setState calls with quick fix
• avoid_unnecessary_stateful_widgets rule to detect StatefulWidget with no mutable state with quick fix
• avoid_wrapping_in_padding rule to avoid wrapping in Padding when widget has padding support with quick fix
• dispose_fields rule to detect undisposed fields with quick fix
• prefer_async_callback rule to prefer AsyncCallback over Future<void> Function() with quick fix
• prefer_compute_over_isolate_run rule for web platform compatibility with quick fix
• prefer_const_border_radius rule to prefer BorderRadius.all(Radius.circular()) with quick fix
• prefer_constrained_box_over_container rule to prefer ConstrainedBox over Container with quick fix
• prefer_container rule to merge nested widgets into a single Container with quick fix
• prefer_correct_edge_insets_constructor rule to use simpler EdgeInsets constructors with quick fix
• prefer_for_loop_in_children rule to prefer for-loops over functional list building with quick fix
• prefer_single_setstate rule to merge multiple setState calls with quick fix
• prefer_sized_box_square rule to prefer SizedBox.square with quick fix
• prefer_spacing rule to prefer the spacing argument over SizedBox
• prefer_text_rich rule to prefer Text.rich over RichText with quick fix
• prefer_transform_over_container rule to prefer Transform over Container with quick fix
• prefer_use_callback rule to prefer useCallback over inline closures with quick fix
• prefer_use_prefix rule to prefer use prefix for custom hook functions with quick fix
• prefer_void_callback rule to prefer VoidCallback over void Function() with quick fix
• use_sliver_prefix rule to enforce Sliver prefix for sliver-returning widgets with quick fix

BLoC Rules

• avoid_bloc_public_methods rule to avoid public members in Bloc classes
• avoid_passing_bloc_to_bloc rule to avoid passing Bloc/Cubit to another Bloc/Cubit
• avoid_passing_build_context_to_blocs rule to avoid passing BuildContext to Bloc/Cubit
• prefer_bloc_extensions rule to prefer context.read/context.watch with quick fix
• prefer_immutable_bloc_state rule to annotate Bloc state with @immutable with quick fix
• prefer_multi_bloc_provider rule to prefer MultiBlocProvider with quick fix

Riverpod Rules

• avoid_notifier_constructors rule to avoid constructors with logic in Notifier classes with quick fix
• avoid_public_notifier_properties rule to avoid public non-overridden properties in Notifier classes
• avoid_ref_inside_state_dispose rule to avoid accessing ref inside dispose()
• avoid_ref_read_inside_build rule to avoid ref.read inside build with quick fix
• avoid_state_constructors rule to avoid constructors with logic in State classes with quick fix
• dispose_provided_instances rule to detect instances not disposed via ref.onDispose() with quick fix
• use_ref_and_state_synchronously rule to detect async gaps before ref/state access with quick fix
• use_ref_read_synchronously rule to detect ref.read stored across async gaps with quick fix

Changed

• Extracted shared utility lib/src/constant_expression.dart for constant expression checking
• Updated README and example README to document all 100 rules and 78 quick fixes

0.3.0 - 2026-02-14

Added

• prefer_shorthands_with_enums rule to detect enum values replaceable with shorthand constructors
• prefer_shorthands_with_constructors rule to detect constructors replaceable with shorthand syntax
• prefer_shorthands_with_static_fields rule to detect static fields replaceable with shorthand syntax
• prefer_returning_shorthands rule to detect return statements replaceable with shorthand syntax
• prefer_switch_expression rule to suggest using switch expressions over switch statements
• prefer_explicit_function_type rule to prefer explicit function types over Function
• prefer_type_over_var rule to prefer explicit type annotations over var
• prefer_abstract_final_static_class rule to flag utility classes that should be abstract final
• prefer_iterable_of rule to prefer Iterable.of over Iterable.from for same-type conversions
• avoid_accessing_collections_by_constant_index rule to flag hardcoded index access on collections
• avoid_cascade_after_if_null rule to detect cascades after if-null operators
• avoid_collection_equality_checks rule to flag equality checks on collections
• avoid_collection_methods_with_unrelated_types rule to flag collection method calls with unrelated types
• avoid_commented_out_code rule to detect commented-out code blocks

Changed

• Extracted shared utilities, renamed helpers, and refactored suffix rules

0.2.1 - 2026-02-05

Fixed

• Fix invalid dartdoc reference syntax causing pub.dev scoring issues
• Skip example directory in CI workflow

Added

• README.md for pub.dev Example tab

0.2.0 - 2026-02-05

Added

• use_gap rule to prefer Gap widget over SizedBox or Padding for spacing
• Quick fixes for suffix rules (use_bloc_suffix, use_cubit_suffix, use_notifier_suffix)
• Quick fix for avoid_unnecessary_consumer_widgets rule
• Example project demonstrating all lint rules
• Dartdoc comments to public APIs

Changed

• Renamed test methods to snake_case for consistency
• Applied recommended lints from lints package

0.1.2 - 2026-02-04

Fixed

• Add lib/main.dart re-export for proper analysis_server_plugin discovery
• Replace deprecated analyzer API usages with new equivalents

0.1.1 - 2026-02-04

Fixed

• Allow passing arguments to the format command

0.1.0 - 2026-02-04

Added

• avoid_single_child_in_multi_child_widgets - detect single-child usage in multi-child widgets
• avoid_unnecessary_consumer_widgets - flag unnecessary Riverpod consumer widgets
• avoid_unnecessary_hook_widgets - flag unnecessary hook widgets with quick fix
• prefer_align_over_container - prefer Align over Container for alignment only
• prefer_any_or_every - prefer any/every over manual iteration with quick fix
• prefer_center_over_align - prefer Center over Align for centering with quick fix
• prefer_padding_over_container - prefer Padding over Container for padding only with quick fix
• use_bloc_suffix - enforce Bloc suffix on bloc classes
• use_cubit_suffix - enforce Cubit suffix on cubit classes
• use_dedicated_media_query_methods - prefer dedicated MediaQuery methods with quick fix
• use_notifier_suffix - enforce Notifier suffix on notifier classes
• convert_iterable_map_to_collection_for assist