inherit_from:

- .rubocop_todo.yml

- .rubocop/todo.yml

require: rubocop-performance

AllCops:

TargetRubyVersion: 3.0

NewCops: disable

SuggestExtensions: false

Exclude:

- CHANGELOG.md

- CONDUCT.md

- CONTRIBUTING.md

- Gemfile/**/*

- Gemfile.lock

- Guardfile/**/*

- HACKING.md

- LICENSE/**/*

- README.md

- Rakefile/**/*

- '*'

- __*

- __*/**/*

- appveyor.yml

- benchmark/**/*

- benchmark-ips/**/*

- bin/**/*

- build/**/*

- config.ru

- coverage/**/*

- docs/**/*

- examples/**/*

- exe/**/*

# - lib/**/*

- lib/opal/source_map/vlq.rb

- node_modules/**/*

# - opal/**/*

- opal.gemspec

- pkg/**/*

- spec/**/*

# - stdlib/**/*

- tasks/**/*

- test/**/*

- tmp/**/*

- vendored-minitest/**/*

- vendor/**/* # present in travis

# Files thate were copied from MRI as is

- 'stdlib/benchmark.rb'

- 'stdlib/observer.rb'

- 'stdlib/open-uri.rb'

- 'stdlib/stringio.rb'

- 'stdlib/source_map/*.rb'

- 'stdlib/racc/parser.rb'

- 'stdlib/e2mmap.rb'

- 'stdlib/matrix.rb'

- 'stdlib/matrix/*.rb'

- 'stdlib/pp.rb'

- 'stdlib/prettyprint.rb'

- 'stdlib/optparse.rb'

- 'stdlib/optparse/*.rb'

- 'stdlib/tmpdir.rb'

- 'stdlib/tempfile.rb'

inherit_mode:

merge:

- Exclude

Naming/MethodName:

Exclude:

# Ruby has methods like Integer/Float/Array

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Layout/ClosingParenthesisIndentation:

Enabled: false

Layout/CommentIndentation:

# The following files use comments to show generated ruby code

Exclude:

- 'lib/opal/rewriters/binary_operator_assignment.rb'

- 'lib/opal/rewriters/logical_operator_assignment.rb'

- 'lib/opal/source_map/file.rb'

# We need to support older rubies

Layout/HeredocIndentation:

Enabled: false

Style/FrozenStringLiteralComment:

Exclude:

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Layout/EmptyLineAfterMagicComment:

Exclude:

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Style/GlobalVars:

Exclude:

- 'opal/corelib/kernel.rb'

- 'stdlib/nodejs/irb.rb'

- 'stdlib/console.rb'

- 'stdlib/native.rb'

- 'stdlib/await.rb'

Layout/ExtraSpacing:

Exclude:

# This files uses extra spaces to show an inheritance tree of error classes

- 'opal/corelib/error.rb'

Layout/FirstArrayElementIndentation:

EnforcedStyle: consistent

Layout/SpaceAroundOperators:

Exclude:

- 'opal/corelib/error.rb'

Lint/BooleanSymbol:

Exclude:

# There are AST nodes and rewriters with types :true and :false

- 'lib/opal/nodes/**/*.rb'

- 'lib/opal/rewriters/**/*.rb'

Lint/InheritException:

Exclude:

- 'lib/opal/builder.rb'

- 'lib/opal/errors.rb'

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Lint/LiteralAsCondition:

Exclude:

# Opal supports if `...js...`

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Lint/Loop:

Exclude:

# This is for optimization purposes mostly

- 'opal/corelib/io.rb'

# Allow the use of if/unless inside blocks

Style/Next:

Enabled: false

Lint/RescueException:

Exclude:

# That's what MRI does

- 'opal/corelib/enumerator.rb'

# Promises must care about all exceptions

- 'stdlib/promise.rb'

- 'opal/corelib/binding.rb'

Lint/RedundantStringCoercion:

Exclude:

# That's what MRI does

- 'opal/corelib/error.rb'

Lint/UnusedBlockArgument:

Exclude:

# Variable from Ruby can be accessed in JS, rubocop can't catch it (but JSHint can)

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Lint/UnusedMethodArgument:

Exclude:

# Variable from Ruby can be accessed in JS, rubocop can't catch it (but JSHint can)

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Lint/UselessAssignment:

Exclude:

# Variable from Ruby can be accessed in JS, rubocop can't catch it (but JSHint can)

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Metrics/AbcSize:

Enabled: false

Metrics/BlockLength:

Enabled: false

Metrics/BlockNesting:

Enabled: false

Metrics/ClassLength:

Enabled: false

Metrics/CyclomaticComplexity:

Enabled: false

Metrics/MethodLength:

Enabled: false

Metrics/ModuleLength:

Enabled: false

Metrics/PerceivedComplexity:

Enabled: false

Metrics/ParameterLists:

Exclude:

# Some Ruby methods take 10 arguments

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Naming/BinaryOperatorParameterName:

Exclude:

# Opal follows MRI argument namings

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Naming/PredicateName:

# Ruby has "has_key?" method

ForbiddenPrefixes:

- is_

- have_

Performance/FlatMap:

Exclude:

# That's actually a definition of Enumerable#flat_map

- 'opal/corelib/enumerable.rb'

Performance/RegexpMatch:

# This cop converts =~ to match?

# But this method was introduced only in 2.4

Enabled: false

Performance/UnfreezeString:

Enabled: false

Style/AsciiComments:

Enabled: false

Style/CaseEquality:

Exclude:

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

- 'lib/opal/config.rb'

Style/ClassAndModuleChildren:

Enabled: false

Style/ClassVars:

Exclude:

# These classes use class variables on purpose

- 'lib/opal/rewriters/binary_operator_assignment.rb'

- 'lib/opal/rewriters/logical_operator_assignment.rb'

Style/CommandLiteral:

# This cop converts `` to %x{}

Enabled: false

Style/Documentation:

Enabled: false

Style/EmptyMethod:

# There are a lot of empty methods that are required to make MSpec working

Exclude:

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Style/IfUnlessModifier:

Enabled: false

Style/InfiniteLoop:

# while true is faster than loop

Enabled: false

Style/InverseMethods:

# That's what MRI does

Exclude:

- 'opal/corelib/basic_object.rb'

- 'opal/corelib/kernel.rb'

Lint/MissingSuper:

# Base Opal classes simply can't or shouldn't call super for #method_missing

Exclude:

- 'opal/corelib/basic_object.rb'

- 'opal/corelib/kernel.rb'

- 'opal/corelib/string/inheritance.rb'

- 'stdlib/native.rb'

- 'stdlib/delegate.rb'

- 'stdlib/ostruct.rb'

Style/MissingRespondToMissing:

Enabled: true

Style/NumericPredicate:

Enabled: false

Style/ParallelAssignment:

Enabled: false

Style/PercentLiteralDelimiters:

PreferredDelimiters:

default: '{}'

Exclude:

# Opal has a convention of %x{}

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Style/SafeNavigation:

# Opal supports old versions of Ruby that don't have safe navigator

Enabled: false

Style/SpecialGlobalVars:

Enabled: false

Style/StderrPuts:

Enabled: false

Style/YodaCondition:

Exclude:

# In Opal there are lot of cases like

# if `..js..` == object

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Layout/MultilineAssignmentLayout:

EnforcedStyle: same_line

Style/TrailingCommaInArguments:

# Any style is allowed

Enabled: false

Layout/ParameterAlignment:

EnforcedStyle: with_fixed_indentation

Layout/MultilineMethodCallBraceLayout:

EnforcedStyle: new_line

Style/Lambda:

EnforcedStyle: literal

Layout/EmptyLines:

# Empty lines can be used to separate interface and implementation

Enabled: false

Style/EmptyElse:

# Empty 'else' can be used to indicate a potential empty branch condition

EnforcedStyle: nil

Lint/EmptyWhen:

# Empty 'when' can be used to indicate a potential empty branch condition

Enabled: false

Style/StringLiterals:

Exclude:

# Nodes are more like DSL, so they are allowed to have any internal rules

# that make the code more readable

- 'lib/opal/nodes/**/*.rb'

Style/TrailingUnderscoreVariable:

# We treat a, = *b construction as a potential source of bugs

Enabled: false

Style/WhileUntilModifier:

Enabled: false

Style/RegexpLiteral:

# Use the style that you like more, but if there are slashes or backslashe

# prefer %r{} syntax.

# Rubocop doesn't check for backslashes, so this rule is disabled.

Enabled: false

Naming/FileName:

Exclude:

- 'stdlib/opal-builder.rb'

- 'stdlib/nodejs/open-uri.rb'

- 'stdlib/opal-parser.rb'

- 'stdlib/opal-platform.rb'

- 'stdlib/opal-source-maps.rb'

- 'stdlib/opal-replutils.rb'

Naming/ConstantName:

Exclude:

# MRI has a constant BigDecimal::SIGN_NaN

- 'stdlib/bigdecimal.rb'

- 'stdlib/opal-platform.rb'

Security/Eval:

Exclude:

# That's what parser does

- 'stdlib/opal-parser.rb'

Naming/AccessorMethodName:

Exclude:

# StringScanner has method 'get_byte'

- 'stdlib/strscan.rb'

# Exception has method 'set_backtrace'

- 'opal/corelib/error.rb'

Style/RescueStandardError:

Enabled: false

Style/TrailingCommaInArrayLiteral:

# Any style is allowed

Enabled: false

Style/TrailingCommaInHashLiteral:

# Any style is allowed

Enabled: false

Style/VariableInterpolation:

# `#@native.abc` makes sense for Opal

Enabled: false

Naming/MethodParameterName:

Exclude:

# This file uses parser's code that doesn't match our styling requirements

- 'lib/opal/parser/patch.rb'

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Lint/BigDecimalNew:

Exclude:

# That's the implementation of the Kernel#BigDecimal

- 'stdlib/bigdecimal/kernel.rb'

Style/MutableConstant:

Exclude:

- 'opal/**/*.rb'

- 'stdlib/**/*.rb'

Style/EmptyCaseCondition:

Enabled: false

# Use whatever suites the situation, sometimes assign_inside_condition is

# more readable over assign_to_condition despite the risk of repeating the

# variable name.

Style/ConditionalAssignment:

Enabled: false

Naming/MemoizedInstanceVariableName:

Exclude:

- lib/opal/parser/patch.rb # it's a monkey-patch on the parser gem

- lib/opal/nodes/rescue.rb # we know what we are doing here and no, it's not memoization

Style/AccessModifierDeclarations:

Enabled: false

Style/MultipleComparison:

Enabled: false

Layout/EmptyLineAfterGuardClause:

Enabled: false

Layout/HashAlignment:

Enabled: false

# No way to set multiple preferred names

Naming/RescuedExceptionsVariableName:

Enabled: false

Style/Semicolon:

AllowAsExpressionSeparator: true

Layout/EmptyLinesAroundExceptionHandlingKeywords:

Enabled: false