analysis_options.yaml

# analysis_options.yaml docs: https://www.dartlang.org/guides/language/analysis-options 
analyzer:
  language:
    strict-inference: true
    strict-raw-types: true
  # Strong mode is required. Applies to the current project.
  strong-mode:
    # When compiling to JS, both implicit options apply to the current 
    # project and all dependencies. They are useful to find possible 
    # Type fixes or areas for explicit typing.
    implicit-casts: true
    implicit-dynamic: true

# ALL lint rules are included. Unused lints should be commented
# out with a reason. An up to date list of all options is here
# http://dart-lang.github.io/linter/lints/options/options.html
# Descriptions of each rule is here http://dart-lang.github.io/linter/lints/
#
# To ignore a lint rule on a case by case basic in code just add a comment
# above it or at the end of the line like: // ignore: <linter rule>
# example: // ignore: invalid_assignment, const_initialized_with_non_constant_value
#
# More info about configuring analysis_options.yaml files
# https://www.dartlang.org/guides/language/analysis-options#excluding-lines-within-a-file
linter:
  rules:
    # Declare method return types.
    # http://dart-lang.github.io/linter/lints/always_declare_return_types.html
    # recommendation: recommended
    # reason: React component render() method can return either ReactElement or false
    # 0 issues
    - always_declare_return_types

    # Separate the control structure expression from its statement.
    # http://dart-lang.github.io/linter/lints/always_put_control_body_on_new_line.html
    # recommendation: optional
    # 0 issues
    - always_put_control_body_on_new_line

    # Put @required named parameters first.
    # http://dart-lang.github.io/linter/lints/always_put_required_named_parameters_first.html
    # recommendation: recommended
    # 0 issues
    - always_put_required_named_parameters_first

    # Use @required.
    # http://dart-lang.github.io/linter/lints/always_require_non_null_named_parameters.html
    # recommendation: recommended
    # 0 issues
    - always_require_non_null_named_parameters

    # Specify type annotations.
    # http://dart-lang.github.io/linter/lints/always_specify_types.html
    # recommendation: optional
    # FIXME: 214 lint(s)
    # - always_specify_types

    # Annotate overridden members.
    # http://dart-lang.github.io/linter/lints/annotate_overrides.html
    # recommendation: required
    # 0 issues
    - annotate_overrides

    # Avoid annotating with dynamic when not required.
    # http://dart-lang.github.io/linter/lints/avoid_annotating_with_dynamic.html
    # recommendation: optional
    # FIXME: 7 lint(s)
    # - avoid_annotating_with_dynamic

    # Avoid using `as`.
    # http://dart-lang.github.io/linter/lints/avoid_as.html
    # recommendation: optional
    # 0 issues
    - avoid_as

    # Avoid bool literals in conditional expressions.
    # http://dart-lang.github.io/linter/lints/avoid_bool_literals_in_conditional_expressions.html
    # recommendation: optional
    # 0 issues
    - avoid_bool_literals_in_conditional_expressions

    # Avoid catches without on clauses.
    # http://dart-lang.github.io/linter/lints/avoid_catches_without_on_clauses.html
    # recommendation: optional
    # FIXME: 1 lint(s)
    # - avoid_catches_without_on_clauses

    # Don't explicitly catch Error or types that implement it.
    # http://dart-lang.github.io/linter/lints/avoid_catching_errors.html
    # recommendation: optional
    # 0 issues
    - avoid_catching_errors

    # Avoid defining a class that contains only static members.
    # http://dart-lang.github.io/linter/lints/avoid_classes_with_only_static_members.html
    # recommendation: recommended
    # 0 issues
    - avoid_classes_with_only_static_members

    # Avoid double and int checks.
    # http://dart-lang.github.io/linter/lints/avoid_double_and_int_checks.html
    # recommendation: required
    # 0 issues
    - avoid_double_and_int_checks

    # Avoid empty else statements.
    # http://dart-lang.github.io/linter/lints/avoid_empty_else.html
    # recommendation: required
    # 0 issues
    - avoid_empty_else

    # Avoid field initializers in const classes.
    # http://dart-lang.github.io/linter/lints/avoid_field_initializers_in_const_classes.html
    # recommendation: optional
    # 0 issues
    - avoid_field_initializers_in_const_classes

    # Avoid using `forEach` with a function literal.
    # http://dart-lang.github.io/linter/lints/avoid_function_literals_in_foreach_calls.html
    # recommendation: recommended
    # reason: Use for (x in y) or forEach(someFunc) instead
    # 0 issues
    - avoid_function_literals_in_foreach_calls

    # Don't explicitly initialize variables to null.
    # http://dart-lang.github.io/linter/lints/avoid_init_to_null.html
    # recommendation: recommended
    # 0 issues
    - avoid_init_to_null

    # Avoid JavaScript rounded ints.
    # http://dart-lang.github.io/linter/lints/avoid_js_rounded_ints.html
    # recommendation: optional
    # 0 issues
    - avoid_js_rounded_ints

    # Don't check for null in custom == operators.
    # http://dart-lang.github.io/linter/lints/avoid_null_checks_in_equality_operators.html
    # recommendation: recommended
    # 0 issues
    - avoid_null_checks_in_equality_operators

    # Avoid positional boolean parameters.
    # http://dart-lang.github.io/linter/lints/avoid_positional_boolean_parameters.html
    # recommendation: recommended
    # 0 issues
    - avoid_positional_boolean_parameters

    # Avoid private typedef functions.
    # http://dart-lang.github.io/linter/lints/avoid_private_typedef_functions.html
    # recommendation: optional
    # 0 issues
    - avoid_private_typedef_functions

    # Avoid relative imports for files in `lib/`.
    # http://dart-lang.github.io/linter/lints/avoid_relative_lib_imports.html
    # recommendation: recommended
    # reason: JS compilation will be faster without relative imports. Use package imports.
    # 0 issues
    - avoid_relative_lib_imports

    # Don't rename parameters of overridden methods.
    # http://dart-lang.github.io/linter/lints/avoid_renaming_method_parameters.html
    # recommendation: recommended
    # 0 issues
    - avoid_renaming_method_parameters

    # Avoid return types on setters.
    # http://dart-lang.github.io/linter/lints/avoid_return_types_on_setters.html
    # recommendation: required
    # 0 issues
    - avoid_return_types_on_setters

    # Avoid returning null from members whose return type is bool, double, int, or num.
    # http://dart-lang.github.io/linter/lints/avoid_returning_null.html
    # recommendation: recommended
    # 0 issues
    - avoid_returning_null

    # Avoid returning this from methods just to enable a fluent interface.
    # http://dart-lang.github.io/linter/lints/avoid_returning_this.html
    # recommendation: recommended
    # 0 issues
    - avoid_returning_this

    # Avoid setters without getters.
    # http://dart-lang.github.io/linter/lints/avoid_setters_without_getters.html
    # recommendation: recommended
    # 0 issues
    - avoid_setters_without_getters

    # Avoid single cascade in expression statements.
    # http://dart-lang.github.io/linter/lints/avoid_single_cascade_in_expression_statements.html
    # recommendation: optional
    # 0 issues
    - avoid_single_cascade_in_expression_statements

    # Avoid slow async `dart:io` methods.
    # http://dart-lang.github.io/linter/lints/avoid_slow_async_io.html
    # recommendation: recommended
    # 0 issues
    - avoid_slow_async_io

    # Avoid types as parameter names.
    # http://dart-lang.github.io/linter/lints/avoid_types_as_parameter_names.html
    # recommendation: required
    # 0 issues
    - avoid_types_as_parameter_names

    # Avoid annotating types for function expression parameters.
    # http://dart-lang.github.io/linter/lints/avoid_types_on_closure_parameters.html
    # recommendation: optional
    # FIXME: 18 lint(s)
    # - avoid_types_on_closure_parameters

    # Avoid defining unused paramters in constructors.
    # http://dart-lang.github.io/linter/lints/avoid_unused_constructor_parameters.html
    # recommendation: recommended
    # 0 issues
    - avoid_unused_constructor_parameters

    # Await only futures.
    # http://dart-lang.github.io/linter/lints/await_only_futures.html
    # recommendation: required
    # 0 issues
    - await_only_futures

    # Name types using UpperCamelCase.
    # http://dart-lang.github.io/linter/lints/camel_case_types.html
    # recommendation: required
    # 0 issues
    - camel_case_types

    # Cancel instances of dart.async.StreamSubscription.
    # http://dart-lang.github.io/linter/lints/cancel_subscriptions.html
    # recommendation: required
    # 0 issues
    - cancel_subscriptions

    # Cascade consecutive method invocations on the same reference.
    # http://dart-lang.github.io/linter/lints/cascade_invocations.html
    # recommendation: optional
    # FIXME: 23 lint(s)
    # - cascade_invocations

    # Close instances of `dart.core.Sink`.
    # http://dart-lang.github.io/linter/lints/close_sinks.html
    # recommendation: required
    # 0 issues
    - close_sinks

    # Only reference in scope identifiers in doc comments.
    # http://dart-lang.github.io/linter/lints/comment_references.html
    # recommendation: recommended
    # 0 issues
    - comment_references

    # Prefer using lowerCamelCase for constant names.
    # http://dart-lang.github.io/linter/lints/constant_identifier_names.html
    # recommendation: optional
    # 0 issues
    - constant_identifier_names

    # Avoid control flow in finally blocks.
    # http://dart-lang.github.io/linter/lints/control_flow_in_finally.html
    # recommendation: required
    # 0 issues
    - control_flow_in_finally

    # Adhere to Effective Dart Guide directives sorting conventions.
    # http://dart-lang.github.io/linter/lints/directives_ordering.html
    # recommendation: recommended
    # 0 issues
    - directives_ordering

    # Avoid empty catch blocks.
    # http://dart-lang.github.io/linter/lints/empty_catches.html
    # recommendation: required
    # 0 issues
    - empty_catches

    # Use `;` instead of `{}` for empty constructor bodies.
    # http://dart-lang.github.io/linter/lints/empty_constructor_bodies.html
    # recommendation: recommended
    # 0 issues
    - empty_constructor_bodies

    # Avoid empty statements.
    # http://dart-lang.github.io/linter/lints/empty_statements.html
    # recommendation: required
    # 0 issues
    - empty_statements

    # Always override `hashCode` if overriding `==`.
    # http://dart-lang.github.io/linter/lints/hash_and_equals.html
    # recommendation: required
    # 0 issues
    - hash_and_equals

    # Don't import implementation files from another package.
    # http://dart-lang.github.io/linter/lints/implementation_imports.html
    # recommendation: required
    # 0 issues
    - implementation_imports

    # Conditions should not unconditionally evaluate to `true` or to `false`.
    # http://dart-lang.github.io/linter/lints/invariant_booleans.html
    # recommendation: required
    # 0 issues
    - invariant_booleans

    # Invocation of Iterable<E>.contains with references of unrelated types.
    # http://dart-lang.github.io/linter/lints/iterable_contains_unrelated_type.html
    # recommendation: required
    # 0 issues
    - iterable_contains_unrelated_type

    # Join return statement with assignment when possible.
    # http://dart-lang.github.io/linter/lints/join_return_with_assignment.html
    # recommendation: optional
    # 0 issues
    - join_return_with_assignment

    # Name libraries and source files using `lowercase_with_underscores`.
    # http://dart-lang.github.io/linter/lints/library_names.html
    # recommendation: recommended
    # 0 issues
    - library_names

    # Use `lowercase_with_underscores` when specifying a library prefix.
    # http://dart-lang.github.io/linter/lints/library_prefixes.html
    # recommendation: recommended
    # 0 issues
    - library_prefixes

    # Invocation of `remove` with references of unrelated types.
    # http://dart-lang.github.io/linter/lints/list_remove_unrelated_type.html
    # recommendation: required
    # 0 issues
    - list_remove_unrelated_type

    # Boolean expression composed only with literals.
    # http://dart-lang.github.io/linter/lints/literal_only_boolean_expressions.html
    # recommendation: required
    # 0 issues
    - literal_only_boolean_expressions

    # Don't use adjacent strings in list.
    # http://dart-lang.github.io/linter/lints/no_adjacent_strings_in_list.html
    # recommendation: required
    # 0 issues
    - no_adjacent_strings_in_list

    # Don't use more than one case with same value.
    # http://dart-lang.github.io/linter/lints/no_duplicate_case_values.html
    # recommendation: required
    # 0 issues
    - no_duplicate_case_values

    # Name non-constant identifiers using lowerCamelCase.
    # http://dart-lang.github.io/linter/lints/non_constant_identifier_names.html
    # recommendation: recommended
    # 0 issues
    - non_constant_identifier_names

    # Omit type annotations for local variables.
    # http://dart-lang.github.io/linter/lints/omit_local_variable_types.html
    # recommendation: optional
    # reason: Conflicts with always_specify_types. Recommend commenting this one out.
    # FIXME: 7 lint(s)
    # - omit_local_variable_types

    # Avoid defining a one-member abstract class when a simple function will do.
    # http://dart-lang.github.io/linter/lints/one_member_abstracts.html
    # recommendation: optional
    # FIXME: 4 lint(s)
    # - one_member_abstracts

    # Only throw instances of classes extending either Exception or Error.
    # http://dart-lang.github.io/linter/lints/only_throw_errors.html
    # recommendation: required
    # 0 issues
    - only_throw_errors

    # Don't override fields.
    # http://dart-lang.github.io/linter/lints/overridden_fields.html
    # recommendation: optional
    # 0 issues
    - overridden_fields

    # Provide doc comments for all public APIs.
    # http://dart-lang.github.io/linter/lints/package_api_docs.html
    # recommendation: optional
    # 0 issues
    - package_api_docs

    # Use `lowercase_with_underscores` for package names.
    # http://dart-lang.github.io/linter/lints/package_names.html
    # recommendation: recommended
    # 0 issues
    - package_names

    # Prefix library names with the package name and a dot-separated path.
    # http://dart-lang.github.io/linter/lints/package_prefixed_library_names.html
    # recommendation: recommended
    # 0 issues
    - package_prefixed_library_names

    # Don't reassign references to parameters of functions or methods.
    # http://dart-lang.github.io/linter/lints/parameter_assignments.html
    # recommendation: optional
    # FIXME: 2 lint(s)
    # - parameter_assignments

    # Use adjacent strings to concatenate string literals.
    # http://dart-lang.github.io/linter/lints/prefer_adjacent_string_concatenation.html
    # recommendation: optional
    # 0 issues
    - prefer_adjacent_string_concatenation

    # Prefer putting asserts in initializer list.
    # http://dart-lang.github.io/linter/lints/prefer_asserts_in_initializer_lists.html
    # recommendation: optional
    # 0 issues
    - prefer_asserts_in_initializer_lists

    # Use collection literals when possible.
    # http://dart-lang.github.io/linter/lints/prefer_collection_literals.html
    # recommendation: recommended
    # 0 issues
    - prefer_collection_literals

    # Prefer using `??=` over testing for null.
    # http://dart-lang.github.io/linter/lints/prefer_conditional_assignment.html
    # recommendation: optional
    # FIXME: 2 lint(s)
    # - prefer_conditional_assignment

    # Prefer const with constant constructors.
    # http://dart-lang.github.io/linter/lints/prefer_const_constructors.html
    # recommendation: optional
    # FIXME: 8 lint(s)
    # - prefer_const_constructors

    # Prefer declare const constructors on `@immutable` classes.
    # http://dart-lang.github.io/linter/lints/prefer_const_constructors_in_immutables.html
    # recommendation: optional
    # 0 issues
    - prefer_const_constructors_in_immutables

    # Prefer const over final for declarations.
    # http://dart-lang.github.io/linter/lints/prefer_const_declarations.html
    # recommendation: recommended
    # 0 issues
    - prefer_const_declarations

    # Prefer const literals as parameters of constructors on @immutable classes.
    # http://dart-lang.github.io/linter/lints/prefer_const_literals_to_create_immutables.html
    # recommendation: optional
    # 0 issues
    - prefer_const_literals_to_create_immutables

    # Prefer defining constructors instead of static methods to create instances.
    # http://dart-lang.github.io/linter/lints/prefer_constructors_over_static_methods.html
    # recommendation: optional
    # 0 issues
    - prefer_constructors_over_static_methods

    # Use contains for `List` and `String` instances.
    # http://dart-lang.github.io/linter/lints/prefer_contains.html
    # recommendation: recommended
    # 0 issues
    - prefer_contains

    # Prefer equal for default values.
    # http://dart-lang.github.io/linter/lints/prefer_equal_for_default_values.html
    # recommendation: optional
    # FIXME: 3 lint(s)
    # - prefer_equal_for_default_values

    # Use => for short members whose body is a single return statement.
    # http://dart-lang.github.io/linter/lints/prefer_expression_function_bodies.html
    # recommendation: optional
    # FIXME: 10 lint(s)
    # - prefer_expression_function_bodies

    # Private field could be final.
    # http://dart-lang.github.io/linter/lints/prefer_final_fields.html
    # recommendation: optional
    # FIXME: 6 lint(s)
    # - prefer_final_fields

    # Prefer final for variable declaration if reference is not reassigned.
    # http://dart-lang.github.io/linter/lints/prefer_final_locals.html
    # recommendation: optional
    # reason: Generates a lot of lint since people use var a lot for local variables.
    # FIXME: 99 lint(s)
    # - prefer_final_locals

    # Use `forEach` to only apply a function to all the elements.
    # http://dart-lang.github.io/linter/lints/prefer_foreach.html
    # recommendation: optional
    # 0 issues
    - prefer_foreach

    # Use a function declaration to bind a function to a name.
    # http://dart-lang.github.io/linter/lints/prefer_function_declarations_over_variables.html
    # recommendation: recommended
    # 0 issues
    - prefer_function_declarations_over_variables

    # Prefer generic function type aliases.
    # http://dart-lang.github.io/linter/lints/prefer_generic_function_type_aliases.html
    # recommendation: optional
    # FIXME: 6 lint(s)
    # - prefer_generic_function_type_aliases

    # Use initializing formals when possible.
    # http://dart-lang.github.io/linter/lints/prefer_initializing_formals.html
    # recommendation: recommended
    # 0 issues
    - prefer_initializing_formals

    # Use interpolation to compose strings and values.
    # http://dart-lang.github.io/linter/lints/prefer_interpolation_to_compose_strings.html
    # recommendation: optional
    # 0 issues
    - prefer_interpolation_to_compose_strings

    # Use `isEmpty` for Iterables and Maps.
    # http://dart-lang.github.io/linter/lints/prefer_is_empty.html
    # recommendation: required
    # 0 issues
    - prefer_is_empty

    # Use `isNotEmpty` for Iterables and Maps.
    # http://dart-lang.github.io/linter/lints/prefer_is_not_empty.html
    # recommendation: required
    # 0 issues
    - prefer_is_not_empty

    # Prefer to use whereType on iterable.
    # http://dart-lang.github.io/linter/lints/prefer_iterable_whereType.html
    # recommendation: optional
    # reason: Optional for now since it is only available in Dart 2
    # 0 issues
    - prefer_iterable_whereType

    # Prefer single quotes where they won't require escape sequences.
    # http://dart-lang.github.io/linter/lints/prefer_single_quotes.html
    # recommendation: recommended
    # 0 issues
    - prefer_single_quotes

    # Prefer typing uninitialized variables and fields.
    # http://dart-lang.github.io/linter/lints/prefer_typing_uninitialized_variables.html
    # recommendation: required
    # 0 issues
    - prefer_typing_uninitialized_variables

    # Document all public members.
    # http://dart-lang.github.io/linter/lints/public_member_api_docs.html
    # recommendation: optional
    # reason: Can get annoying for React component lifecycle methods, constructors.
    # FIXME: 16 lint(s)
    # - public_member_api_docs

    # Property getter recursively returns itself.
    # http://dart-lang.github.io/linter/lints/recursive_getters.html
    # recommendation: optional
    # 0 issues
    - recursive_getters

    # Prefer using /// for doc comments.
    # http://dart-lang.github.io/linter/lints/slash_for_doc_comments.html
    # recommendation: recommended
    # 0 issues
    - slash_for_doc_comments

    # Sort constructor declarations before method declarations.
    # http://dart-lang.github.io/linter/lints/sort_constructors_first.html
    # recommendation: optional
    # 0 issues
    # - sort_constructors_first

    # Sort unnamed constructor declarations first.
    # http://dart-lang.github.io/linter/lints/sort_unnamed_constructors_first.html
    # recommendation: optional
    # 0 issues
    - sort_unnamed_constructors_first

    # Test type arguments in operator ==(Object other).
    # http://dart-lang.github.io/linter/lints/test_types_in_equals.html
    # recommendation: required
    # 0 issues
    - test_types_in_equals

    # Avoid `throw` in finally block.
    # http://dart-lang.github.io/linter/lints/throw_in_finally.html
    # recommendation: required
    # 0 issues
    - throw_in_finally

    # Type annotate public APIs.
    # http://dart-lang.github.io/linter/lints/type_annotate_public_apis.html
    # recommendation: recommended
    # reason: React component render() method can return either ReactElement or false. Use overrides.
    # 0 issues
    - type_annotate_public_apis

    # Don't type annotate initializing formals.
    # http://dart-lang.github.io/linter/lints/type_init_formals.html
    # recommendation: optional
    # 0 issues
    - type_init_formals

    # Await future-returning functions inside async function bodies.
    # http://dart-lang.github.io/linter/lints/unawaited_futures.html
    # recommendation: recommended
    # 0 issues
    - unawaited_futures

    # Avoid using braces in interpolation when not needed.
    # http://dart-lang.github.io/linter/lints/unnecessary_brace_in_string_interps.html
    # recommendation: optional
    # 0 issues
    - unnecessary_brace_in_string_interps

    # Avoid wrapping fields in getters and setters just to be "safe".
    # http://dart-lang.github.io/linter/lints/unnecessary_getters_setters.html
    # recommendation: optional
    # 0 issues
    - unnecessary_getters_setters

    # Don't create a lambda when a tear-off will do.
    # http://dart-lang.github.io/linter/lints/unnecessary_lambdas.html
    # recommendation: recommended
    # 0 issues
    - unnecessary_lambdas

    # Avoid null in null-aware assignment.
    # http://dart-lang.github.io/linter/lints/unnecessary_null_aware_assignments.html
    # recommendation: required
    # 0 issues
    - unnecessary_null_aware_assignments

    # Avoid using `null` in `if null` operators.
    # http://dart-lang.github.io/linter/lints/unnecessary_null_in_if_null_operators.html
    # recommendation: required
    # 0 issues
    - unnecessary_null_in_if_null_operators

    # Don't override a method to do a super method invocation with the same parameters.
    # http://dart-lang.github.io/linter/lints/unnecessary_overrides.html
    # recommendation: optional
    # 0 issues
    - unnecessary_overrides

    # Unnecessary parenthesis can be removed.
    # http://dart-lang.github.io/linter/lints/unnecessary_parenthesis.html
    # recommendation: optional
    # 0 issues
    - unnecessary_parenthesis

    # Avoid using unnecessary statements.
    # http://dart-lang.github.io/linter/lints/unnecessary_statements.html
    # recommendation: required
    # 0 issues
    - unnecessary_statements

    # Don't access members with `this` unless avoiding shadowing.
    # http://dart-lang.github.io/linter/lints/unnecessary_this.html
    # recommendation: recommended
    # 0 issues
    - unnecessary_this

    # Equality operator `==` invocation with references of unrelated types.
    # http://dart-lang.github.io/linter/lints/unrelated_type_equality_checks.html
    # recommendation: required
    # reason: Comparing references of a type where neither is a subtype of the other most likely will return false and might not reflect programmer's intent.
    # 0 issues
    - unrelated_type_equality_checks

    # Use rethrow to rethrow a caught exception.
    # http://dart-lang.github.io/linter/lints/use_rethrow_when_possible.html
    # recommendation: recommended
    # 0 issues
    - use_rethrow_when_possible

    # Use a setter for operations that conceptually change a property.
    # http://dart-lang.github.io/linter/lints/use_setters_to_change_properties.html
    # recommendation: optional
    # 0 issues
    - use_setters_to_change_properties

    # Use string buffer to compose strings.
    # http://dart-lang.github.io/linter/lints/use_string_buffers.html
    # recommendation: optional
    # 0 issues
    - use_string_buffers

    # Start the name of the method with to/_to or as/_as if applicable.
    # http://dart-lang.github.io/linter/lints/use_to_and_as_if_applicable.html
    # recommendation: optional
    # 0 issues
    - use_to_and_as_if_applicable

    # Use valid regular expression syntax.
    # http://dart-lang.github.io/linter/lints/valid_regexps.html
    # recommendation: required
    # 0 issues
    - valid_regexps

    # Don't assign to void.
    # http://dart-lang.github.io/linter/lints/void_checks.html
    # recommendation: required
    # reason: Trying to assigning a value to void is an error.
    # 0 issues
    - void_checks