Merge pull request #2679 from MikeMcQuaid/parallel-rubocop

Use parallel RuboCop

.travis.yml

@@ -2,9 +2,9 @@ language: ruby
 cache:
   directories:
     - $HOME/.gem/ruby
+    - $HOME/Library/Caches/Homebrew/style
+    - $HOME/Library/Caches/Homebrew/tests
     - Library/Homebrew/vendor/bundle
-    # For parallel_rspec
-    - Library/Homebrew/tmp
 
 matrix:
   include:

Library/.rubocop.yml

@@ -23,23 +23,67 @@ FormulaAuditStrict/ComponentsRedundancy:
 FormulaAudit/Homepage:
   Enabled: true
 
-Metrics/AbcSize:
+# `system` is a special case and aligns on second argument
+Layout/AlignParameters:
   Enabled: false
 
+Layout/CaseIndentation:
+  EnforcedStyle: end
+
+Layout/EmptyLineBetweenDefs:
+  AllowAdjacentOneLineDefs: true
+
+Layout/IndentArray:
+  EnforcedStyle: special_inside_parentheses
+
+Layout/IndentHeredoc:
+  EnforcedStyle: unindent
+
+# conflicts with DSL-style path concatenation with `/`
+Layout/SpaceAroundOperators:
+  Enabled: false
+
+# favor parens-less DSL-style arguments
+Lint/AmbiguousOperator:
+  Enabled: false
+
+# so many of these in formulae and can't be autocorrected
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+
+# favor parens-less DSL-style arguments
+Lint/AmbiguousBlockAssociation:
+  Enabled: false
+
+# assignment in conditions are useful sometimes
+Lint/AssignmentInCondition:
+  Enabled: false
+
+Lint/EndAlignment:
+  EnforcedStyleAlignWith: variable
+
+# so many of these in formulae and can't be autocorrected
+Lint/ParenthesesAsGroupedExpression:
+  Enabled: false
+
+# TODO: try to bring down all metrics maximums
+Metrics/AbcSize:
+  Max: 250
+
 Metrics/BlockLength:
-  Enabled: false
+  Max: 1250
 
 Metrics/ClassLength:
-  Enabled: false
+  Max: 1500
 
 Metrics/CyclomaticComplexity:
-  Enabled: false
+  Max: 75
 
 Metrics/LineLength:
-  Enabled: false
+  Max: 400
 
 Metrics/MethodLength:
-  Enabled: false
+  Max: 250
 
 Metrics/ModuleLength:
   CountComments: false
@@ -47,36 +91,19 @@ Metrics/ModuleLength:
     - '**/bin/**/*'
     - '**/cmd/**/*'
     - '**/lib/**/*'
-    - '**/spec/**/*'
 
 Metrics/PerceivedComplexity:
-  Enabled: false
+  Max: 80
 
-# favor parens-less DSL-style arguments
+# makes code less readable for minor performance increases
-Lint/AmbiguousOperator:
+Performance/Caller:
-  Enabled: false
-
-Lint/AmbiguousRegexpLiteral:
-  Enabled: false
-
-Lint/AssignmentInCondition:
-  Enabled: false
-
-Lint/EndAlignment:
-  EnforcedStyleAlignWith: variable
-
-Lint/ParenthesesAsGroupedExpression:
   Enabled: false
 
 Style/Alias:
   EnforcedStyle: prefer_alias
 
-Style/AlignHash:
+Style/AutoResourceCleanup:
-  Enabled: false
+  Enabled: true
-
-# `system` is a special case and aligns on second argument
-Style/AlignParameters:
-  Enabled: false
 
 Style/BarePercentLiterals:
   EnforcedStyle: percent_q
@@ -84,9 +111,6 @@ Style/BarePercentLiterals:
 Style/BlockDelimiters:
   EnforcedStyle: line_count_based
 
-Style/CaseIndentation:
-  EnforcedStyle: end
-
 Style/ClassAndModuleChildren:
   EnforcedStyle: nested
 
@@ -99,16 +123,22 @@ Style/CommandLiteral:
 Style/ConditionalAssignment:
   Enabled: false
 
+# most of our APIs are internal so don't require docs
 Style/Documentation:
  Enabled: false
 
-Style/EmptyLineBetweenDefs:
+Style/Encoding:
-  AllowAdjacentOneLineDefs: true
+  Enabled: true
 
 # dashes in filenames are typical
 Style/FileName:
   Regex: !ruby/regexp /^[\w\@\-\+\.]+(\.rb)?$/
 
+# falsely flags e.g. curl formatting arguments as format strings
+Style/FormatStringToken:
+  Enabled: false
+
+# so many of these in formulae and can't be autocorrected
 Style/GuardClause:
   Enabled: false
 
@@ -121,13 +151,6 @@ Style/HashSyntax:
     - '**/lib/**/*'
     - '**/spec/**/*'
 
-# disabled until it respects line length
-Style/IfUnlessModifier:
-  Enabled: false
-
-Style/IndentArray:
-  EnforcedStyle: special_inside_parentheses
-
 # only for numbers >= 1_000_000
 Style/NumericLiterals:
   MinDigits: 7
@@ -160,13 +183,6 @@ Style/RaiseArgs:
 Style/RegexpLiteral:
   EnforcedStyle: slashes
 
-# conflicts with DSL-style path concatenation with `/`
-Style/SpaceAroundOperators:
-  Enabled: false
-
-Style/SingleLineBlockParams:
-  Enabled: false
-
 # not a problem for typical shell users
 Style/SpecialGlobalVars:
   Enabled: false
@@ -179,17 +195,22 @@ Style/StringLiterals:
 Style/StringLiteralsInInterpolation:
   EnforcedStyle: double_quotes
 
+Style/SymbolArray:
+  EnforcedStyle: brackets
+
 Style/TernaryParentheses:
-  Enabled: false
+  EnforcedStyle: require_parentheses_when_complex
 
 # makes diffs nicer
 Style/TrailingCommaInLiteral:
   EnforcedStyleForMultiline: comma
+
 Style/TrailingCommaInArguments:
   EnforcedStyleForMultiline: comma
 
+# we have too many variables like sha256 where this harms readability
 Style/VariableNumber:
   Enabled: false
 
 Style/WordArray:
-  Enabled: false
+  MinSize: 4

Library/Homebrew/.rubocop.yml

@@ -9,9 +9,8 @@ AllCops:
     - '**/Casks/**/*'
     - '**/vendor/**/*'
 
-Style/BlockDelimiters:
+Layout/MultilineMethodCallIndentation:
   Exclude:
-    - '**/cask/spec/**/*'
     - '**/*_spec.rb'
 
 # so many of these in formulae but none in here
@@ -27,16 +26,13 @@ Lint/NestedMethodDefinition:
 Lint/ParenthesesAsGroupedExpression:
   Enabled: true
 
-Metrics/ModuleLength:
-  CountComments: false
-  Exclude:
-    - 'cask/lib/hbc/locations.rb'
-    - 'cask/lib/hbc/macos.rb'
-    - 'cask/lib/hbc/utils.rb'
-
 Metrics/ParameterLists:
   CountKeywordArgs: false
 
+Style/BlockDelimiters:
+  Exclude:
+    - '**/*_spec.rb'
+
 # so many of these in formulae but none in here
 Style/GuardClause:
   Enabled: true

Library/Homebrew/brew.rb

@@ -116,7 +116,6 @@ begin
       odie "Unknown command: #{cmd}"
     end
   end
-
 rescue UsageError => e
   require "cmd/help"
   Homebrew.help cmd, usage_error: e.message

Library/Homebrew/cask/lib/hbc/artifact/base.rb

@@ -10,7 +10,7 @@ module Hbc
       end
 
       def self.artifact_english_article
-        @artifact_english_article ||= artifact_english_name =~ /^[aeiou]/i ? "an" : "a"
+        @artifact_english_article ||= (artifact_english_name =~ /^[aeiou]/i) ? "an" : "a"
       end
 
       def self.artifact_dsl_key
@@ -43,7 +43,7 @@ module Hbc
         unless unknown_keys.empty?
           opoo %Q{Unknown arguments to #{description} -- #{unknown_keys.inspect} (ignored). Running "brew update; brew cleanup; brew cask cleanup" will likely fix it.}
         end
-        arguments.reject! { |k| !permitted_keys.include?(k) }
+        arguments.select! { |k| permitted_keys.include?(k) }
 
         # key warnings
         override_keys = override_arguments.keys

Library/Homebrew/cask/lib/hbc/artifact/uninstall_base.rb

@@ -197,9 +197,7 @@ module Hbc
         paths.each do |path|
           resolved_path = Pathname.new(path)
 
-          if path.start_with?("~")
+          resolved_path = resolved_path.expand_path if path.start_with?("~")
-            resolved_path = resolved_path.expand_path
-          end
 
           if resolved_path.relative? || resolved_path.split.any? { |part| part.to_s == ".." }
             opoo "Skipping #{Formatter.identifier(action)} for relative path '#{path}'."

Library/Homebrew/cask/lib/hbc/cask.rb

@@ -66,7 +66,7 @@ module Hbc
       return [] if current == version
 
       # collect all installed versions that are different than tap version and return them
-      installed.select { |v| v != version }
+      installed.reject { |v| v == version }
     end
 
     def to_s

Library/Homebrew/cask/lib/hbc/cask_loader.rb

@@ -54,7 +54,7 @@ module Hbc
 
     class FromURILoader < FromPathLoader
       def self.can_load?(ref)
-        !(ref.to_s !~ ::URI.regexp)
+        ref.to_s =~ ::URI.regexp
       end
 
       def initialize(url)
@@ -80,7 +80,7 @@ module Hbc
 
     class FromTapLoader < FromPathLoader
       def self.can_load?(ref)
-        !(ref.to_s !~ HOMEBREW_TAP_CASK_REGEX)
+        ref.to_s =~ HOMEBREW_TAP_CASK_REGEX
       end
 
       def initialize(tapped_name)

Library/Homebrew/cask/lib/hbc/cli.rb

@@ -140,9 +140,7 @@ module Hbc
       command_name, *args = *@args
       command = help? ? "help" : self.class.lookup_command(command_name)
 
-      unless ENV["MACOS_VERSION"].nil?
+      MacOS.full_version = ENV["MACOS_VERSION"] unless ENV["MACOS_VERSION"].nil?
-        MacOS.full_version = ENV["MACOS_VERSION"]
-      end
 
       Hbc.default_tap.install unless Hbc.default_tap.installed?
       Hbc.init if self.class.should_init?(command)

Library/Homebrew/cask/lib/hbc/cli/abstract_command.rb

@@ -15,7 +15,7 @@ module Hbc
       end
 
       def self.abstract?
-        !(name.split("::").last !~ /^Abstract[^a-z]/)
+        name.split("::").last =~ /^Abstract[^a-z]/
       end
 
       def self.visible

Library/Homebrew/cask/lib/hbc/cli/doctor.rb

@@ -17,17 +17,17 @@ module Hbc
         ohai "Contents of $LOAD_PATH", self.class.render_load_path($LOAD_PATH)
         ohai "Environment Variables"
 
-        environment_variables = [
+        environment_variables = %w[
-          "RUBYLIB",
+          RUBYLIB
-          "RUBYOPT",
+          RUBYOPT
-          "RUBYPATH",
+          RUBYPATH
-          "RBENV_VERSION",
+          RBENV_VERSION
-          "CHRUBY_VERSION",
+          CHRUBY_VERSION
-          "GEM_HOME",
+          GEM_HOME
-          "GEM_PATH",
+          GEM_PATH
-          "BUNDLE_PATH",
+          BUNDLE_PATH
-          "PATH",
+          PATH
-          "SHELL",
+          SHELL
         ]
 
         (self.class.locale_variables + environment_variables).sort.each(&self.class.method(:render_env_var))

Library/Homebrew/cask/lib/hbc/cli/info.rb

@@ -49,7 +49,7 @@ module Hbc
       end
 
       def self.name_info(cask)
-        ohai cask.name.size > 1 ? "Names" : "Name"
+        ohai((cask.name.size > 1) ? "Names" : "Name")
         puts cask.name.empty? ? Formatter.error("None") : cask.name
       end
 
@@ -69,7 +69,7 @@ module Hbc
         DSL::ORDINARY_ARTIFACT_TYPES.each do |type|
           next if cask.artifacts[type].empty?
           cask.artifacts[type].each do |artifact|
-            activatable_item = type == :stage_only ? "<none>" : artifact.first
+            activatable_item = (type == :stage_only) ? "<none>" : artifact.first
             puts "#{activatable_item} (#{type})"
           end
         end

Library/Homebrew/cask/lib/hbc/cli/internal_appcast_checkpoint.rb

@@ -43,7 +43,7 @@ module Hbc
             if checkpoint.nil?
               onoe "Could not retrieve `appcast` checkpoint for cask '#{cask}': #{result[:command_result].stderr}"
             else
-              puts cask_tokens.count > 1 ? "#{checkpoint}  #{cask}": checkpoint
+              puts((cask_tokens.count > 1) ? "#{checkpoint}  #{cask}": checkpoint)
               count += 1
             end
           end

Library/Homebrew/cask/lib/hbc/cli/list.rb

@@ -12,7 +12,7 @@ module Hbc
       def run
         retval = args.any? ? list : list_installed
         # retval is ternary: true/false/nil
-        if retval.nil? && !args.any?
+        if retval.nil? && args.none?
           opoo "nothing to list" # special case: avoid exit code
         elsif retval.nil?
           raise CaskError, "nothing to list"

Library/Homebrew/cask/lib/hbc/cli/style.rb

@@ -11,7 +11,8 @@ module Hbc
 
       def run
         install_rubocop
-        system({ "XDG_CACHE_HOME" => HOMEBREW_CACHE }, "rubocop", *rubocop_args, "--", *cask_paths)
+        cache_env = { "XDG_CACHE_HOME" => "#{HOMEBREW_CACHE}/style" }
+        system(cache_env, "rubocop", *rubocop_args, "--", *cask_paths)
         raise CaskError, "style check failed" unless $CHILD_STATUS.success?
         true
       end

Library/Homebrew/cask/lib/hbc/container/dmg.rb

@@ -86,7 +86,7 @@ module Hbc
         Dir.chdir(mount) do
           Dir.glob("**/*", File::FNM_DOTMATCH).map do |path|
             next if skip_path?(Pathname(path))
-            path == "." ? path : path.prepend("./")
+            (path == ".") ? path : path.prepend("./")
           end.compact.join("\n").concat("\n")
         end
       end

Library/Homebrew/cask/lib/hbc/download_strategy.rb

@@ -212,7 +212,7 @@ module Hbc
   class SubversionDownloadStrategy < HbVCSDownloadStrategy
     def cache_tag
       # TODO: pass versions as symbols, support :head here
-      version == "head" ? "svn-HEAD" : "svn"
+      (version == "head") ? "svn-HEAD" : "svn"
     end
 
     def repo_valid?

Library/Homebrew/cask/lib/hbc/dsl.rb

@@ -119,9 +119,7 @@ module Hbc
     def language_eval
       return @language if instance_variable_defined?(:@language)
 
-      if @language_blocks.nil? || @language_blocks.empty?
+      return @language = nil if @language_blocks.nil? || @language_blocks.empty?
-        return @language = nil
-      end
 
       MacOS.languages.map(&Locale.method(:parse)).each do |locale|
         key = @language_blocks.keys.detect do |strings|

Library/Homebrew/cask/lib/hbc/exceptions.rb

@@ -113,7 +113,7 @@ module Hbc
     end
 
     def to_s
-      "Cask '#{token}' definition is invalid" + (!submsg.empty? ? ": #{submsg}" : "")
+      "Cask '#{token}' definition is invalid#{": #{submsg}" unless submsg.empty?}"
     end
   end
 

Library/Homebrew/cask/lib/hbc/system_command.rb

@@ -94,7 +94,7 @@ module Hbc
       loop do
         readable_sources = IO.select(sources)[0]
         readable_sources.delete_if(&:eof?).first(1).each do |source|
-          type = (source == sources[0] ? :stdout : :stderr)
+          type = ((source == sources[0]) ? :stdout : :stderr)
           begin
             yield(type, source.readline_nonblock || "")
           rescue IO::WaitReadable, EOFError

Library/Homebrew/cmd/deps.rb

@@ -38,6 +38,7 @@
 #:    `--include-optional`, and `--skip-recommended` as documented above.
 
 # encoding: UTF-8
+
 require "formula"
 require "ostruct"
 
@@ -112,10 +113,10 @@ module Homebrew
       end
     else
       deps = f.deps.reject do |dep|
-        ignores.any? { |ignore| dep.send(ignore) } && !includes.any? { |include| dep.send(include) }
+        ignores.any? { |ignore| dep.send(ignore) } && includes.none? { |include| dep.send(include) }
       end
       reqs = f.requirements.reject do |req|
-        ignores.any? { |ignore| req.send(ignore) } && !includes.any? { |include| req.send(include) }
+        ignores.any? { |ignore| req.send(ignore) } && includes.none? { |include| req.send(include) }
       end
     end
 
@@ -160,7 +161,7 @@ module Homebrew
       else
         "├──"
       end
-      prefix_ext = i == max ? "    " : "│   "
+      prefix_ext = (i == max) ? "    " : "│   "
       puts prefix + "#{chr} #{dep_display_name(dep)}"
       recursive_deps_tree(Formulary.factory(dep.name), prefix + prefix_ext)
     end

Library/Homebrew/cmd/help.rb

@@ -1,4 +1,4 @@
-HOMEBREW_HELP = <<-EOS.freeze
+HOMEBREW_HELP = <<-EOS.unindent.freeze
   Example usage:
     brew search [TEXT|/REGEX/]
     brew (info|home|options) [FORMULA...]

Library/Homebrew/cmd/link.rb

@@ -72,9 +72,7 @@ module Homebrew
           puts "#{n} symlinks created"
         end
 
-        if keg_only && !ARGV.homebrew_developer?
+        puts_keg_only_path_message(keg) if keg_only && !ARGV.homebrew_developer?
-          puts_keg_only_path_message(keg)
-        end
       end
     end
   end

Library/Homebrew/cmd/style.rb

@@ -73,7 +73,11 @@ module Homebrew
     args = %w[
       --force-exclusion
     ]
-    args << "--auto-correct" if fix
+    if fix
+      args << "--auto-correct"
+    else
+      args << "--parallel"
+    end
 
     if options[:except_cops]
       options[:except_cops].map! { |cop| RuboCop::Cop::Cop.registry.qualified_cop_name(cop.to_s, "") }
@@ -101,14 +105,16 @@ module Homebrew
       args += files
     end
 
+    cache_env = { "XDG_CACHE_HOME" => "#{HOMEBREW_CACHE}/style" }
+
     case output_type
     when :print
       args << "--display-cop-names" if ARGV.include? "--display-cop-names"
       args << "--format" << "simple" if files
-      system({ "XDG_CACHE_HOME" => HOMEBREW_CACHE }, "rubocop", *args)
+      system(cache_env, "rubocop", *args)
       !$?.success?
     when :json
-      json, _, status = Open3.capture3({ "XDG_CACHE_HOME" => HOMEBREW_CACHE }, "rubocop", "--format", "json", *args)
+      json, _, status = Open3.capture3(cache_env, "rubocop", "--format", "json", *args)
       # exit status of 1 just means violations were found; other numbers mean
       # execution errors.
       # exitstatus can also be nil if RuboCop process crashes, e.g. due to

Library/Homebrew/cmd/uses.rb

@@ -98,10 +98,10 @@ module Homebrew
             reqs = reqs_by_formula.map(&:last)
           else
             deps = f.deps.reject do |dep|
-              ignores.any? { |ignore| dep.send(ignore) } && !includes.any? { |include| dep.send(include) }
+              ignores.any? { |ignore| dep.send(ignore) } && includes.none? { |include| dep.send(include) }
             end
             reqs = f.requirements.reject do |req|
-              ignores.any? { |ignore| req.send(ignore) } && !includes.any? { |include| req.send(include) }
+              ignores.any? { |ignore| req.send(ignore) } && includes.none? { |include| req.send(include) }
             end
           end
           next true if deps.any? do |dep|

Library/Homebrew/compat/utils.rb

@@ -19,5 +19,5 @@ end
 
 def plural(n, s = "s")
   odeprecated "#plural", "Formatter.pluralize"
-  n == 1 ? "" : s
+  (n == 1) ? "" : s
 end

Library/Homebrew/constants.rb

@@ -1,3 +1,3 @@
 # RuboCop version used for `brew style` and `brew cask style`
-HOMEBREW_RUBOCOP_VERSION = "0.47.1".freeze
+HOMEBREW_RUBOCOP_VERSION = "0.49.1".freeze
-HOMEBREW_RUBOCOP_CASK_VERSION = "~> 0.12.0".freeze # has to be updated when RuboCop version changes
+HOMEBREW_RUBOCOP_CASK_VERSION = "~> 0.13.0".freeze # has to be updated when RuboCop version changes

Library/Homebrew/cxxstdlib.rb

@@ -16,7 +16,7 @@ class CxxStdlib
     if type && ![:libstdcxx, :libcxx].include?(type)
       raise ArgumentError, "Invalid C++ stdlib type: #{type}"
     end
-    klass = compiler.to_s =~ GNU_GCC_REGEXP ? GnuStdlib : AppleStdlib
+    klass = (compiler.to_s =~ GNU_GCC_REGEXP) ? GnuStdlib : AppleStdlib
     klass.new(type, compiler)
   end
 

Library/Homebrew/descriptions.rb

@@ -121,7 +121,7 @@ class Descriptions
     blank = Formatter.warning("[no description]")
     @descriptions.keys.sort.each do |full_name|
       short_name = short_names[full_name]
-      printed_name = short_name_counts[short_name] == 1 ? short_name : full_name
+      printed_name = (short_name_counts[short_name] == 1) ? short_name : full_name
       description = @descriptions[full_name] || blank
       puts "#{Tty.bold}#{printed_name}:#{Tty.reset} #{description}"
     end

Library/Homebrew/dev-cmd/audit.rb

@@ -591,9 +591,7 @@ class FormulaAuditor
   def audit_homepage
     homepage = formula.homepage
 
-    if homepage.nil? || homepage.empty?
+    return if homepage.nil? || homepage.empty?
-      return
-    end
 
     return unless @online
 
@@ -988,9 +986,7 @@ class FormulaAuditor
       problem ":apr is deprecated. Usage should be \"apr-util\""
     end
 
-    if line =~ /depends_on :tex/
+    problem ":tex is deprecated" if line =~ /depends_on :tex/
-      problem ":tex is deprecated"
-    end
 
     if line =~ /depends_on\s+['"](.+)['"]\s+=>\s+:(lua|perl|python|ruby)(\d*)/
       problem "#{$2} modules should be vendored rather than use deprecated `depends_on \"#{$1}\" => :#{$2}#{$3}`"

Library/Homebrew/dev-cmd/bottle.rb

@@ -314,8 +314,8 @@ module Homebrew
 
     old_spec = f.bottle_specification
     if ARGV.include?("--keep-old") && !old_spec.checksums.empty?
-      mismatches = [:root_url, :prefix, :cellar, :rebuild].select do |key|
+      mismatches = [:root_url, :prefix, :cellar, :rebuild].reject do |key|
-        old_spec.send(key) != bottle.send(key)
+        old_spec.send(key) == bottle.send(key)
       end
       mismatches.delete(:cellar) if old_spec.cellar == :any && bottle.cellar == :any_skip_relocation
       unless mismatches.empty?
@@ -382,9 +382,7 @@ module Homebrew
       bottle = BottleSpecification.new
       bottle.root_url bottle_hash["bottle"]["root_url"]
       cellar = bottle_hash["bottle"]["cellar"]
-      if cellar == "any" || cellar == "any_skip_relocation"
+      cellar = cellar.to_sym if ["any", "any_skip_relocation"].include?(cellar)
-        cellar = cellar.to_sym
-      end
       bottle.cellar cellar
       bottle.prefix bottle_hash["bottle"]["prefix"]
       bottle.rebuild bottle_hash["bottle"]["rebuild"]

Library/Homebrew/dev-cmd/edit.rb

@@ -21,7 +21,7 @@ module Homebrew
     # If no brews are listed, open the project root in an editor.
     if ARGV.named.empty?
       editor = File.basename which_editor
-      if editor == "mate" || editor == "subl"
+      if ["mate", "subl"].include?(editor)
         # If the user is using TextMate or Sublime Text,
         # give a nice project view instead.
         exec_editor HOMEBREW_REPOSITORY+"bin/brew",

Library/Homebrew/dev-cmd/tests.rb

@@ -60,9 +60,7 @@ module Homebrew
       end
 
       Homebrew.install_gem_setup_path! "bundler"
-      unless quiet_system("bundle", "check")
+      system "bundle", "install" unless quiet_system("bundle", "check")
-        system "bundle", "install"
-      end
 
       parallel = true
 
@@ -91,12 +89,12 @@ module Homebrew
       end
 
       args = ["-I", HOMEBREW_LIBRARY_PATH/"test"]
-      args += %w[
+      args += %W[
         --color
         --require spec_helper
         --format progress
         --format ParallelTests::RSpec::RuntimeLogger
-        --out tmp/parallel_runtime_rspec.log
+        --out #{HOMEBREW_CACHE}/tests/parallel_runtime_rspec.log
       ]
 
       args << "--seed" << ARGV.next if ARGV.include? "--seed"

Library/Homebrew/extend/string.rb

@@ -2,6 +2,7 @@ class String
   def undent
     gsub(/^[ \t]{#{(slice(/^[ \t]+/) || '').length}}/, "")
   end
+  alias unindent undent
 
   # eg:
   #   if foo then <<-EOS.undent_________________________________________________________72

Library/Homebrew/formula_cellar_checks.rb

@@ -61,9 +61,9 @@ module FormulaCellarChecks
 
     valid_extensions = %w[.a .dylib .framework .jnilib .la .o .so
                           .jar .prl .pm .sh]
-    non_libraries = formula.lib.children.select do |g|
+    non_libraries = formula.lib.children.reject do |g|
       next if g.directory?
-      !valid_extensions.include? g.extname
+      valid_extensions.include? g.extname
     end
     return if non_libraries.empty?
 

Library/Homebrew/formula_installer.rb

@@ -472,7 +472,7 @@ class FormulaInstaller
 
   def effective_build_options_for(dependent, inherited_options = [])
     args  = dependent.build.used_options
-    args |= dependent == formula ? options : inherited_options
+    args |= (dependent == formula) ? options : inherited_options
     args |= Tab.for_formula(dependent).used_options
     args &= dependent.options
     BuildOptions.new(args, dependent.options)
@@ -680,7 +680,6 @@ class FormulaInstaller
     if !formula.prefix.directory? || Keg.new(formula.prefix).empty_installation?
       raise "Empty installation"
     end
-
   rescue Exception
     ignore_interrupts do
       # any exceptions must leave us with nothing installed

Library/Homebrew/keg.rb

@@ -367,7 +367,7 @@ class Keg
           dep_formula = Formulary.factory(dep["full_name"])
           dep_formula == to_formula
         rescue FormulaUnavailableError
-          next "#{tap}/#{name}" == dep["full_name"]
+          next dep["full_name"] == "#{tap}/#{name}"
         end
       end
     end

Library/Homebrew/language/haskell.rb

@@ -47,7 +47,7 @@ module Language
       def cabal_install(*args)
         # cabal hardcodes 64 as the maximum number of parallel jobs
         # https://github.com/Homebrew/legacy-homebrew/issues/49509
-        make_jobs = ENV.make_jobs > 64 ? 64 : ENV.make_jobs
+        make_jobs = (ENV.make_jobs > 64) ? 64 : ENV.make_jobs
 
         # cabal-install's dependency-resolution backtracking strategy can easily
         # need more than the default 2,000 maximum number of "backjumps," since

Library/Homebrew/os/mac.rb

@@ -90,7 +90,7 @@ module OS
       @locator ||= SDKLocator.new
       begin
         sdk = if v.nil?
-          Xcode.version.to_i >= 7 ? @locator.latest_sdk : @locator.sdk_for(version)
+          (Xcode.version.to_i >= 7) ? @locator.latest_sdk : @locator.sdk_for(version)
         else
           @locator.sdk_for v
         end

Library/Homebrew/os/mac/linkage_checker.rb

@@ -62,10 +62,10 @@ class LinkageChecker
     declared_deps = formula.deps.reject { |dep| filter_out.call(dep) }.map(&:name)
     declared_requirement_deps = formula.requirements.reject { |req| filter_out.call(req) }.map(&:default_formula).compact
     declared_dep_names = (declared_deps + declared_requirement_deps).map { |dep| dep.split("/").last }
-    undeclared_deps = @brewed_dylibs.keys.select do |full_name|
+    undeclared_deps = @brewed_dylibs.keys.reject do |full_name|
       name = full_name.split("/").last
-      next false if name == formula.name
+      next true if name == formula.name
-      !declared_dep_names.include?(name)
+      declared_dep_names.include?(name)
     end
     undeclared_deps.sort do |a, b|
       if a.include?("/") && !b.include?("/")

Library/Homebrew/rubocops/components_order_cop.rb

@@ -96,7 +96,7 @@ module RuboCop
           else
             indentation = " " * (start_column(node2) - line_start_column(node2))
             # No line breaks upto version_scheme, order_idx == 8
-            line_breaks = order_idx>8 ? "\n\n" : "\n"
+            line_breaks = (order_idx>8) ? "\n\n" : "\n"
             corrector.insert_before(node2.source_range, node1.source+line_breaks+indentation)
           end
           corrector.remove(range_with_surrounding_space(node1.source_range, :left))

Library/Homebrew/sandbox.rb

@@ -176,7 +176,7 @@ class Sandbox
 
     def add_rule(rule)
       s = "("
-      s << (rule[:allow] ? "allow": "deny")
+      s << ((rule[:allow]) ? "allow": "deny")
       s << " #{rule[:operation]}"
       s << " (#{rule[:filter]})" if rule[:filter]
       s << " (with #{rule[:modifier]})" if rule[:modifier]

Library/Homebrew/software_spec.rb

@@ -235,7 +235,7 @@ class Bottle
     end
 
     def suffix
-      s = rebuild > 0 ? ".#{rebuild}" : ""
+      s = (rebuild > 0) ? ".#{rebuild}" : ""
       ".bottle#{s}.tar.gz"
     end
   end

Library/Homebrew/test/Gemfile

@@ -2,11 +2,11 @@ source "https://rubygems.org"
 
 gem "parallel_tests"
 gem "rspec"
-gem "rubocop"
 gem "rspec-its", require: false
 gem "rspec-wait", require: false
+gem "rubocop"
 
 group :coverage do
-  gem "simplecov", require: false
   gem "codecov", require: false
+  gem "simplecov", require: false
 end

Library/Homebrew/test/Gemfile.lock

@@ -36,7 +36,8 @@ GEM
     rspec-support (3.6.0)
     rspec-wait (0.0.9)
       rspec (>= 3, < 4)
-    rubocop (0.48.1)
+    rubocop (0.49.1)
+      parallel (~> 1.10)
       parser (>= 2.3.3.1, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)

Library/Homebrew/test/cask/download_strategy_spec.rb

@@ -1,6 +1,6 @@
 describe "download strategies", :cask do
   let(:url) { "http://example.com/cask.dmg" }
-  let(:url_options) { Hash.new }
+  let(:url_options) { {} }
   let(:cask) {
     instance_double(Hbc::Cask, token:   "some-cask",
                                url:     Hbc::URL.new(url, url_options),

Library/Homebrew/test/formatter_spec.rb

@@ -4,11 +4,11 @@ require "utils/tty"
 describe Formatter do
   describe "::columns" do
     let(:input) {
-      [
+      %w[
-        "aa",
+        aa
-        "bbb",
+        bbb
-        "ccc",
+        ccc
-        "dd",
+        dd
       ]
     }
     subject { described_class.columns(input) }

Library/Homebrew/test/formula_spec.rb

@@ -683,7 +683,7 @@ describe Formula do
     end
 
     expect(f5.deps.map(&:name)).to eq(["f3", "f4"])
-    expect(f5.recursive_dependencies.map(&:name)).to eq(["f1", "f2", "f3", "f4"])
+    expect(f5.recursive_dependencies.map(&:name)).to eq(%w[f1 f2 f3 f4])
     expect(f5.runtime_dependencies.map(&:name)).to eq(["f1", "f4"])
   end
 

Library/Homebrew/test/migrator_spec.rb

@@ -44,9 +44,7 @@ describe Migrator do
   end
 
   after(:each) do
-    if !old_keg_record.parent.symlink? && old_keg_record.directory?
+    keg.unlink if !old_keg_record.parent.symlink? && old_keg_record.directory?
-      keg.unlink
-    end
 
     if new_keg_record.directory?
       new_keg = Keg.new(new_keg_record)

Library/Homebrew/test/pathname_spec.rb

@@ -104,7 +104,7 @@ describe Pathname do
     end
 
     it "preserves permissions" do
-      File.open(file, "w", 0100777).close
+      File.open(file, "w", 0100777) {}
       file.atomic_write("CONTENT")
       expect(file.stat.mode).to eq(0100777 & ~File.umask)
     end

Library/Homebrew/test/string_spec.rb

@@ -3,7 +3,7 @@ require "extend/string"
 describe String do
   describe "#undent" do
     it "removes leading whitespace, taking the first line as reference" do
-      string = <<-EOS.undent
+      string = <<-EOS.unindent
                 hi
                 ........my friend over
                   there
@@ -13,7 +13,7 @@ describe String do
     end
 
     it "removes nothing if the text is not indented" do
-      string = <<-EOS.undent
+      string = <<-EOS.unindent
         hi
         I'm not indented
       EOS

Library/Homebrew/version.rb

@@ -280,7 +280,7 @@ class Version
   private
 
   def max(a, b)
-    a > b ? a : b
+    (a > b) ? a : b
   end
 
   def tokenize