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analysis_options.yaml

-# 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/*"
-
-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
-    # - 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/3023
-    # - 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
-    - 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
-    # - 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_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
-    # - 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
-    - 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 https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#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 https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#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
-    - 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
-    - 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_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
-    - unsafe_html
-    - 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
-    - valid_regexps
-    - void_checks