brew/Library/.rubocop.yml

# TODO: Try getting more rules in sync.

require:
  - ./Homebrew/rubocops.rb
  - rubocop-performance
  - rubocop-rails

inherit_mode:
  merge:
    - Include
    - Exclude

AllCops:
  TargetRubyVersion: 2.6
  DisplayCopNames: false
  # enable all pending rubocops
  NewCops: enable
  Include:
    - "**/*.rbi"
  Exclude:
    - "Homebrew/sorbet/rbi/gems/**/*.rbi"
    - "Homebrew/sorbet/rbi/hidden-definitions/**/*.rbi"
    - "Homebrew/sorbet/rbi/todo.rbi"
    - "Homebrew/sorbet/rbi/upstream.rbi"
    - "Homebrew/bin/*"
    - "Homebrew/vendor/**/*"
    - "Taps/*/*/vendor/**/*"

Cask/Desc:
  Description: "Ensure that the desc stanza conforms to various content and style checks."
  Enabled: true

Cask/HomepageUrlTrailingSlash:
  Description: "Ensure that the homepage url has a slash after the domain name."
  Enabled: true

Cask/NoDslVersion:
  Description: "Do not use the deprecated DSL version syntax in your cask header."
  Enabled: true

Cask/StanzaGrouping:
  Description: "Ensure that cask stanzas are grouped correctly. More info at https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/readme.md#stanza-order"
  Enabled: true

Cask/StanzaOrder:
  Description: "Ensure that cask stanzas are sorted correctly. More info at https://github.com/Homebrew/homebrew-cask/blob/HEAD/doc/cask_language_reference/readme.md#stanza-order"
  Enabled: true

# enable all formulae audits
FormulaAudit:
  Enabled: true

# enable all formulae strict audits
FormulaAuditStrict:
  Enabled: true

# makes DSL usage ugly.
Layout/SpaceBeforeBrackets:
  Exclude:
    - "**/*_spec.rb"
    - "Taps/*/*/*.rb"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"

# Use `<<~` for heredocs.
Layout/HeredocIndentation:
  Enabled: true

# Keyword arguments don't have the same readability
# problems as normal parameters.
Metrics/ParameterLists:
  CountKeywordArgs: false

# Allow dashes in filenames.
Naming/FileName:
  Regex: !ruby/regexp /^[\w\@\-\+\.]+(\.rb)?$/

# Implicitly allow EOS as we use it everywhere.
Naming/HeredocDelimiterNaming:
  ForbiddenDelimiters:
    - END, EOD, EOF

Naming/MethodName:
  IgnoredPatterns:
    - '\A(fetch_)?HEAD\?\Z'

# Both styles are used depending on context,
# e.g. `sha256` and `something_countable_1`.
Naming/VariableNumber:
  Enabled: false

# Require &&/|| instead of and/or
Style/AndOr:
  Enabled: true
  EnforcedStyle: always

# Avoid leaking resources.
Style/AutoResourceCleanup:
  Enabled: true

# This makes these a little more obvious.
Style/BarePercentLiterals:
  EnforcedStyle: percent_q

# Use consistent style for better readability.
Style/CollectionMethods:
  Enabled: true

# Prefer tokens with type annotations for consistency
# between formatting numbers and strings.
Style/FormatStringToken:
  EnforcedStyle: annotated

# autocorrectable and more readable
Style/HashEachMethods:
  Enabled: true
Style/HashTransformKeys:
  Enabled: true
Style/HashTransformValues:
  Enabled: true

# Allow for license expressions
Style/HashAsLastArrayItem:
  Exclude:
    - "Taps/*/*/*.rb"
    - "/**/Formula/*.rb"
    - "**/Formula/*.rb"

# Enabled now LineLength is lowish.
Style/IfUnlessModifier:
  Enabled: true

# Only use this for numbers >= `1_000_000`.
Style/NumericLiterals:
  MinDigits: 7
  Strict: true
  Exclude:
    - "**/Brewfile"

# Zero-prefixed octal literals are widely used and understood.
Style/NumericLiteralPrefix:
  EnforcedOctalStyle: zero_only

# Rescuing `StandardError` is an understood default.
Style/RescueStandardError:
  EnforcedStyle: implicit

# Returning `nil` is unnecessary.
Style/ReturnNil:
  Enabled: true

# We have no use for using `warn` because we
# are calling Ruby with warnings disabled.
Style/StderrPuts:
  Enabled: false

# Use consistent method names.
Style/StringMethods:
  Enabled: true

# An array of symbols is more readable than a symbol array
# and also allows for easier grepping.
Style/SymbolArray:
  EnforcedStyle: brackets

# Trailing commas make diffs nicer.
Style/TrailingCommaInArguments:
  EnforcedStyleForMultiline: comma
Style/TrailingCommaInArrayLiteral:
  EnforcedStyleForMultiline: comma
Style/TrailingCommaInHashLiteral:
  EnforcedStyleForMultiline: comma

# Does not hinder readability, so might as well enable it.
Performance/CaseWhenSplat:
  Enabled: true

# Makes code less readable for minor performance increases.
Performance/Caller:
  Enabled: false

# Makes code less readable for minor performance increases.
Performance/MethodObjectAsBlock:
  Enabled: false

# Cannot use ActiveSupport in RuboCops.
Rails:
  Exclude:
    - "Homebrew/rubocops/**/*"

# Skip these as they only apply to actual Rails and not our ActiveSupport usage.
Rails/ArelStar:
  Enabled: false
Rails/Date:
  Enabled: false
Rails/Delegate:
  Enabled: false
Rails/SkipsModelValidations:
  Enabled: false
Rails/Pluck:
  Enabled: false
Rails/TimeZone:
  Enabled: false

# Don't allow cops to be disabled in casks and formulae.
Style/DisableCopsWithinSourceCodeDirective:
  Enabled: true
  Include:
    - "Taps/*/*/*.rb"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"

# make our hashes consistent
Layout/HashAlignment:
  EnforcedHashRocketStyle: table
  EnforcedColonStyle: table

# `system` is a special case and aligns on second argument, so allow this for formulae.
Layout/ArgumentAlignment:
  Exclude:
    - "Taps/*/*/*.rb"
    - "/**/Formula/*.rb"
    - "**/Formula/*.rb"

# this is a bit less "floaty"
Layout/CaseIndentation:
  EnforcedStyle: end

# this is a bit less "floaty"
Layout/EndAlignment:
  EnforcedStyleAlignWith: start_of_line

# conflicts with DSL-style path concatenation with `/`
Layout/SpaceAroundOperators:
  Enabled: false

# layout is not configurable (https://github.com/rubocop-hq/rubocop/issues/6254).
Layout/RescueEnsureAlignment:
  Enabled: false

# favour parens-less DSL-style arguments
Lint/AmbiguousBlockAssociation:
  Enabled: false

Lint/DuplicateBranch:
  Exclude:
    - "Taps/*/*/*.rb"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"

# needed for lazy_object magic
Naming/MemoizedInstanceVariableName:
  Exclude:
    - "Homebrew/lazy_object.rb"

# so many of these in formulae and can't be autocorrected
# TODO: fix these as `ruby -w` complains about them.
Lint/AmbiguousRegexpLiteral:
  Exclude:
    - "Taps/*/*/*.rb"
    - "/**/Formula/*.rb"
    - "**/Formula/*.rb"

# useful for metaprogramming in RSpec
Lint/ConstantDefinitionInBlock:
  Exclude:
    - "**/*_spec.rb"

# so many of these in formulae and can't be autocorrected
Lint/ParenthesesAsGroupedExpression:
  Exclude:
    - "Taps/*/*/*.rb"
    - "/**/Formula/*.rb"
    - "**/Formula/*.rb"

# Most metrics don't make sense to apply for casks/formulae/taps.
Metrics/AbcSize:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
Metrics/BlockLength:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
Metrics/ClassLength:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
Metrics/CyclomaticComplexity:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
Metrics/MethodLength:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
Metrics/ModuleLength:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
Metrics/PerceivedComplexity:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"

# allow those that are standard
# TODO: try to remove some of these
Naming/MethodParameterName:
  AllowedNames:
    - "_"
    - "a"
    - "b"
    - "cc"
    - "c1"
    - "c2"
    - "d"
    - "e"
    - "f"
    - "ff"
    - "fn"
    - "id"
    - "io"
    - "o"
    - "p"
    - "pr"
    - "r"
    - "rb"
    - "s"
    - "to"
    - "v"

# GitHub diff UI wraps beyond 118 characters
Layout/LineLength:
  Max: 118
  # ignore manpage comments and long single-line strings
  IgnoredPatterns:
    [
      "#: ",
      ' url "',
      ' mirror "',
      " plist_options ",
      ' appcast "',
      ' executable: "',
      ' font "',
      ' homepage "',
      ' name "',
      ' pkg "',
      ' pkgutil: "',
      '    sha256 "',
      "#{language}",
      "#{version.",
      ' "/Library/Application Support/',
      '"/Library/Caches/',
      '"/Library/PreferencePanes/',
      ' "~/Library/Application Support/',
      '"~/Library/Caches/',
      '"~/Application Support',
      " was verified as official when first introduced to the cask",
    ]

Sorbet/FalseSigil:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
    - "Homebrew/test/**/Casks/**/*.rb"
    - "Homebrew/homebrew_bootsnap.rb"

Sorbet/StrictSigil:
  Enabled: true
  Include:
    - "**/*.rbi"

# Try getting rid of these.
Sorbet/ConstantsFromStrings:
  Enabled: false

# Avoid false positives on modifiers used on symbols of methods
# See https://github.com/rubocop-hq/rubocop/issues/5953
Style/AccessModifierDeclarations:
  Enabled: false

# Conflicts with type signatures on `attr_*`s.
Style/AccessorGrouping:
  Enabled: false

# make rspec formatting more flexible
Style/BlockDelimiters:
  Exclude:
    - "Homebrew/**/*_spec.rb"
    - "Homebrew/**/shared_examples/**/*.rb"

# TODO: remove this when possible.
Style/ClassVars:
  Exclude:
    - "**/developer/bin/*"

# Don't enforce documentation in casks or formulae.
Style/Documentation:
  Exclude:
    - "Taps/**/*"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
    - "**/*.rbi"

Style/DocumentationMethod:
  Include:
    - "Homebrew/formula.rb"

# Not used for casks and formulae.
Style/FrozenStringLiteralComment:
  EnforcedStyle: always
  Exclude:
    - "Taps/*/*/*.rb"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"
    - "Homebrew/test/**/Casks/**/*.rb"
    - "**/*.rbi"
    - "**/Brewfile"

# TODO: remove this when possible.
Style/GlobalVars:
  Exclude:
    - "**/developer/bin/*"

# potential for errors in formulae too high with this
Style/GuardClause:
  Exclude:
    - "Taps/*/*/*.rb"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"

# avoid hash rockets where possible
Style/HashSyntax:
  EnforcedStyle: ruby19

# so many of these in formulae and can't be autocorrected
Style/StringConcatenation:
  Exclude:
    - "Taps/*/*/*.rb"
    - "/**/{Formula,Casks}/*.rb"
    - "**/{Formula,Casks}/*.rb"

# ruby style guide favorite
Style/StringLiterals:
  EnforcedStyle: double_quotes

# consistency with above
Style/StringLiteralsInInterpolation:
  EnforcedStyle: double_quotes

# make things a bit easier to read
Style/TernaryParentheses:
  EnforcedStyle: require_parentheses_when_complex

# a bit confusing to non-Rubyists but useful for longer arrays
Style/WordArray:
  MinSize: 4

# would rather freeze too much than too little
Style/MutableConstant:
  EnforcedStyle: strict

# unused keyword arguments improve APIs
Lint/UnusedMethodArgument:
  AllowUnusedKeywordArguments: true