brew/Library/.rubocop.yml

AllCops:
  TargetRubyVersion: 2.3
  Exclude:
    - '**/Casks/**/*'
    - '**/vendor/**/*'
  DisplayCopNames: false

require: ./Homebrew/rubocops.rb

# enable all formulae audits
FormulaAudit:
  Enabled: true

# enable all formulae strict audits
FormulaAuditStrict:
  Enabled: true

# disable all formulae strict audits by default
NewFormulaAudit:
  Enabled: false

# `system` is a special case and aligns on second argument
Layout/AlignParameters:
  Enabled: false

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

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

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

# enforce use of <<~EOS
Layout/IndentHeredoc:
  EnforcedStyle: squiggly

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

# use spaces for indentation; detect tabs
Layout/Tab:
  Enabled: true

# Auto-correct is broken (https://github.com/rubocop-hq/rubocop/issues/6300).
Layout/EmptyLineAfterGuardClause:
  Enabled: false

# Auto-correct is broken (https://github.com/rubocop-hq/rubocop/issues/6258)
# and 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

# so many of these in formulae and can't be autocorrected
# TODO: fix these as `ruby -w` complains about them.
Lint/AmbiguousRegexpLiteral:
  Enabled: false

# assignment in conditions are useful sometimes
# TODO: add parentheses for these and remove
Lint/AssignmentInCondition:
  Enabled: false

# we output how to use interpolated strings too often
Lint/InterpolationCheck:
  Enabled: false

# so many of these in formulae and can't be autocorrected
Lint/ParenthesesAsGroupedExpression:
  Enabled: false

# most metrics don't make sense to apply for formulae/taps
Metrics/AbcSize:
  Enabled: false
Metrics/BlockLength:
  Enabled: false
Metrics/ClassLength:
  Enabled: false
Metrics/CyclomaticComplexity:
  Enabled: false
Metrics/MethodLength:
  Enabled: false
# Metrics/ModuleLength:
#   Enabled: false
Metrics/PerceivedComplexity:
  Enabled: false

# keyword arguments don't have the same readability problems
Metrics/ParameterLists:
  CountKeywordArgs: false

# GitHub diff UI wraps beyond 118 characters (so that's the goal)
Metrics/LineLength:
  Max: 189
  # ignore manpage comments and long single-line strings
  IgnoredPatterns: ['#: ', ' url "', ' mirror "', ' plist_options :']

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

# implicitly allow EOS as we use it everywhere
Naming/HeredocDelimiterNaming:
  Blacklist:
    - END, EOD, EOF

# we have too many variables like sha256 where this harms readability
Naming/VariableNumber:
  Enabled: false

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

# we're doing this already so why not
Performance/CaseWhenSplat:
  Enabled: true

# enable to avoid leaking resources
Style/AutoResourceCleanup:
  Enabled: true

# this is a little more obvious what's going on
Style/BarePercentLiterals:
  EnforcedStyle: percent_q

# consistency helps readability and helps people who don't know Ruby
Style/CollectionMethods:
  Enabled: true

# our current conditional style is established
# TODO: enable this when possible
Style/ConditionalAssignment:
  Enabled: false

# most of our APIs are internal so don't require docs
Style/Documentation:
 Enabled: false

# we don't need UTF-8 encoding comments
Style/Encoding:
  Enabled: true

# falsely flags e.g. curl formatting arguments as format strings
Style/FormatStringToken:
  EnforcedStyle: template

# we want to add this slowly and manually
# TODO: add to more files
Style/FrozenStringLiteralComment:
  Enabled: false

# so many of these in formulae and can't be autocorrected
Style/GuardClause:
  Enabled: false

# depends_on a: :b looks weird in formulae.
Style/HashSyntax:
  EnforcedStyle: hash_rockets
  Exclude:
    - '**/bin/**/*'
    - '**/cmd/**/*'
    - '**/lib/**/*'
    - '**/spec/**/*'

# this doesn't make sense for wide lines below maximum line length
# https://github.com/rubocop-hq/rubocop/issues/6149
Style/IfUnlessModifier:
  Enabled: false

# only for numbers >= 1_000_000
Style/NumericLiterals:
  MinDigits: 7

# zero-prefixed octal literals are just too widely used (and understood)
Style/NumericLiteralPrefix:
  EnforcedOctalStyle: zero_only

# rescuing StandardError is an understood default
Style/RescueStandardError:
  EnforcedStyle: implicit

# return nil is unnecessary and a common mistake believing it's required
Style/ReturnNil:
  Enabled: true

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

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

# consistency with above
Style/StringLiteralsInInterpolation:
  EnforcedStyle: double_quotes

# consistency helps readability and helps people who don't know Ruby
Style/StringMethods:
  Enabled: true

# less confusing to non-Rubyists
Style/SymbolArray:
  EnforcedStyle: brackets

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

# messes with existing plist/caveats style
Style/TrailingBodyOnMethodDefinition:
  Enabled: false

# all trailing commas make diffs nicer
Style/TrailingCommaInArguments:
  EnforcedStyleForMultiline: comma
Style/TrailingCommaInArrayLiteral:
  EnforcedStyleForMultiline: comma
Style/TrailingCommaInHashLiteral:
  EnforcedStyleForMultiline: comma

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