Upgrade RuboCop to v1.30

.github/workflows/rubocop.yml

@@ -9,10 +9,10 @@ jobs:
       BUNDLE_WITHOUT: development
     steps:
     - uses: actions/checkout@v3
-    - name: Set up Ruby 2.4
+    - name: Set up Ruby 2.6
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.4
+        ruby-version: 2.6
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
     - name: Run RuboCop
       run: bundle exec rubocop

.rubocop.yml

@@ -2,6 +2,8 @@ inherit_from: .rubocop_todo.yml
 
 AllCops:
   TargetRubyVersion: 2.0
+  SuggestExtensions: false
+  NewCops: disable
 
   DisplayCopNames: true
   Exclude:
@@ -12,16 +14,22 @@ AllCops:
 Layout/CaseIndentation:
   EnforcedStyle: end
 
-Layout/IndentHash:
+Layout/FirstHashElementIndentation:
   EnforcedStyle: consistent
 
-Lint/EndAlignment:
+Layout/EndAlignment:
   EnforcedStyleAlignWith: variable
 
+Layout/HashAlignment:
+  EnforcedHashRocketStyle: table
+
 Style/TrailingCommaInArguments:
   EnforcedStyleForMultiline: consistent_comma
 
-Style/TrailingCommaInLiteral:
+Style/TrailingCommaInArrayLiteral:
+  EnforcedStyleForMultiline: consistent_comma
+
+Style/TrailingCommaInHashLiteral:
   EnforcedStyleForMultiline: consistent_comma
 
 Style/TrivialAccessors:

.rubocop_todo.yml

@@ -1,95 +1,176 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2017-11-25 19:54:28 -0500 using RuboCop version 0.50.0.
+# on 2022-05-30 13:48:55 UTC using RuboCop version 1.30.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
 # Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: auto_detection, squiggly, active_support, powerpack, unindent
-Layout/IndentHeredoc:
+# This cop supports safe autocorrection (--autocorrect).
+Layout/HeredocIndentation:
   Exclude:
     - 'support/ruby_enc_to_mysql.rb'
     - 'tasks/compile.rake'
 
 # Offense count: 2
+# Configuration parameters: AllowedMethods.
+# AllowedMethods: enums
+Lint/ConstantDefinitionInBlock:
+  Exclude:
+    - 'spec/mysql2/client_spec.rb'
+    - 'tasks/rspec.rake'
+
+# Offense count: 1
+Lint/MissingSuper:
+  Exclude:
+    - 'lib/mysql2/em.rb'
+
+# Offense count: 2
+# Configuration parameters: IgnoredMethods, CountRepeatedAttributes.
 Metrics/AbcSize:
-  Max: 91
+  Max: 94
 
-# Offense count: 31
-# Configuration parameters: CountComments, ExcludedMethods.
+# Offense count: 34
+# Configuration parameters: CountComments, CountAsOne, ExcludedMethods, IgnoredMethods.
+# IgnoredMethods: refine
 Metrics/BlockLength:
-  Max: 860
+  Max: 592
 
 # Offense count: 1
 # Configuration parameters: CountBlocks.
 Metrics/BlockNesting:
   Max: 5
 
 # Offense count: 1
-# Configuration parameters: CountComments.
+# Configuration parameters: CountComments, CountAsOne.
 Metrics/ClassLength:
   Max: 135
 
 # Offense count: 3
+# Configuration parameters: IgnoredMethods.
 Metrics/CyclomaticComplexity:
-  Max: 32
-
-# Offense count: 313
-# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
-# URISchemes: http, https
-Metrics/LineLength:
-  Max: 232
+  Max: 34
 
 # Offense count: 6
-# Configuration parameters: CountComments.
+# Configuration parameters: CountComments, CountAsOne, ExcludedMethods, IgnoredMethods.
 Metrics/MethodLength:
   Max: 57
 
 # Offense count: 2
+# Configuration parameters: IgnoredMethods.
 Metrics/PerceivedComplexity:
-  Max: 29
+  Max: 32
 
-# Offense count: 3
-# Configuration parameters: Blacklist.
-# Blacklist: END, (?-mix:EO[A-Z]{1})
+# Offense count: 2
+# Configuration parameters: ForbiddenDelimiters.
+# ForbiddenDelimiters: (?-mix:(^|\s)(EO[A-Z]{1}|END)(\s|$))
 Naming/HeredocDelimiterNaming:
   Exclude:
     - 'tasks/compile.rake'
 
-# Offense count: 10
+# Offense count: 1
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Style/CaseLikeIf:
+  Exclude:
+    - 'ext/mysql2/extconf.rb'
+
+# Offense count: 8
+# Configuration parameters: AllowedConstants.
 Style/Documentation:
   Exclude:
     - 'spec/**/*'
     - 'test/**/*'
     - 'benchmark/active_record.rb'
     - 'benchmark/allocations.rb'
-    - 'benchmark/query_with_mysql_casting.rb'
     - 'lib/mysql2.rb'
     - 'lib/mysql2/client.rb'
     - 'lib/mysql2/em.rb'
     - 'lib/mysql2/error.rb'
-    - 'lib/mysql2/result.rb'
     - 'lib/mysql2/statement.rb'
 
-# Offense count: 14
+# Offense count: 6
+# This cop supports safe autocorrection (--autocorrect).
+Style/ExpandPathArguments:
+  Exclude:
+    - 'ext/mysql2/extconf.rb'
+    - 'mysql2.gemspec'
+    - 'spec/mysql2/client_spec.rb'
+    - 'support/mysql_enc_to_ruby.rb'
+    - 'tasks/compile.rake'
+
+# Offense count: 15
 # Configuration parameters: AllowedVariables.
 Style/GlobalVars:
   Exclude:
     - 'ext/mysql2/extconf.rb'
 
-# Offense count: 17
-# Cop supports --auto-correct.
-# Configuration parameters: Strict.
+# Offense count: 8
+# This cop supports safe autocorrection (--autocorrect).
+Style/IfUnlessModifier:
+  Exclude:
+    - 'lib/mysql2.rb'
+    - 'lib/mysql2/client.rb'
+    - 'spec/mysql2/client_spec.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowMethodComparison.
+Style/MultipleComparison:
+  Exclude:
+    - 'lib/mysql2/client.rb'
+
+# Offense count: 18
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: Strict, AllowedNumbers.
 Style/NumericLiterals:
   MinDigits: 20
 
-# Offense count: 726
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, ConsistentQuotesInMultiline.
+# Offense count: 4
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: ConvertCodeThatCanStartToReturnNil, AllowedMethods, MaxChainLength.
+# AllowedMethods: present?, blank?, presence, try, try!
+Style/SafeNavigation:
+  Exclude:
+    - 'benchmark/setup_db.rb'
+    - 'ext/mysql2/extconf.rb'
+    - 'lib/mysql2/em.rb'
+
+# Offense count: 14
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: Mode.
+Style/StringConcatenation:
+  Exclude:
+    - 'benchmark/active_record.rb'
+    - 'benchmark/active_record_threaded.rb'
+    - 'benchmark/allocations.rb'
+    - 'benchmark/escape.rb'
+    - 'benchmark/query_with_mysql_casting.rb'
+    - 'benchmark/query_without_mysql_casting.rb'
+    - 'benchmark/sequel.rb'
+    - 'benchmark/setup_db.rb'
+    - 'ext/mysql2/extconf.rb'
+    - 'lib/mysql2/client.rb'
+    - 'tasks/compile.rake'
+
+# Offense count: 782
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
 # SupportedStyles: single_quotes, double_quotes
 Style/StringLiterals:
   Enabled: false
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: WordRegex.
+# SupportedStyles: percent, brackets
+Style/WordArray:
+  EnforcedStyle: percent
+  MinSize: 4
+
+# Offense count: 32
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, AllowedPatterns, IgnoredPatterns.
+# URISchemes: http, https
+Layout/LineLength:
+  Max: 232

Gemfile

@@ -2,11 +2,11 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'rake', if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("2.2")
-              '~> 13.0.1'
-            else
-              '< 13'
-            end
+if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("2.2")
+  gem 'rake', '~> 13.0.1'
+else
+  gem 'rake', '< 13'
+end
 gem 'rake-compiler', '~> 1.1.0'
 
 # For local debugging, irb is Gemified since Ruby 2.6
@@ -19,7 +19,7 @@ group :test do
   # Downgrade psych because old RuboCop can't use new Psych
   gem 'psych', '< 4.0.0'
   # https://github.com/bbatsov/rubocop/pull/4789
-  gem 'rubocop', '~> 0.50.0'
+  gem 'rubocop', '~> 1.30' if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('2.6')
 end
 
 group :benchmarks, optional: true do

benchmark/allocations.rb

@@ -16,7 +16,7 @@ def bench_allocations(feature, iterations = 10, batch_size = 1000)
   GC::Profiler.clear
   GC::Profiler.enable
   iterations.times { yield batch_size }
-  GC::Profiler.report(STDOUT)
+  GC::Profiler.report($stdout)
   GC::Profiler.disable
 end
 

ext/mysql2/extconf.rb

@@ -181,7 +181,7 @@ def add_ssl_defines(header)
   end
 end
 
-unless disabled_sanitizers.empty?
+unless disabled_sanitizers.empty? # rubocop:disable Style/IfUnlessModifier
   abort "-----\nCould not enable requested sanitizers: #{disabled_sanitizers.join(',')}\n-----"
 end
 

lib/mysql2.rb

@@ -65,6 +65,7 @@ module Util
     #
     def self.key_hash_as_symbols(hash)
       return nil unless hash
+
       Hash[hash.map { |k, v| [k.to_sym, v] }]
     end
 

lib/mysql2/client.rb

@@ -20,6 +20,7 @@ def self.default_query_options
 
     def initialize(opts = {})
       raise Mysql2::Error, "Options parameter must be a Hash" unless opts.is_a? Hash
+
       opts = Mysql2::Util.key_hash_as_symbols(opts)
       @read_timeout = nil
       @query_options = self.class.default_query_options.dup
@@ -33,6 +34,7 @@ def initialize(opts = {})
       # TODO: stricter validation rather than silent massaging
       %i[reconnect connect_timeout local_infile read_timeout write_timeout default_file default_group secure_auth init_command automatic_close enable_cleartext_plugin default_auth].each do |key|
         next unless opts.key?(key)
+
         case key
         when :reconnect, :local_infile, :secure_auth, :automatic_close, :enable_cleartext_plugin
           send(:"#{key}=", !!opts[key]) # rubocop:disable Style/DoubleNegation
@@ -136,6 +138,7 @@ def find_default_ca_path
     # and performance_schema.session_account_connect_attrs
     def parse_connect_attrs(conn_attrs)
       return {} if Mysql2::Client::CONNECT_ATTRS.zero?
+
       conn_attrs ||= {}
       conn_attrs[:program_name] ||= $PROGRAM_NAME
       conn_attrs.each_with_object({}) do |(key, value), hash|
@@ -152,6 +155,7 @@ def query(sql, options = {})
     def query_info
       info = query_info_string
       return {} unless info
+
       info_hash = {}
       info.split.each_slice(2) { |s| info_hash[s[0].downcase.delete(':').to_sym] = s[1].to_i }
       info_hash

spec/mysql2/client_spec.rb

@@ -54,6 +54,7 @@
 
   Klient = Class.new(Mysql2::Client) do
     attr_reader :connect_args
+
     def connect(*args)
       @connect_args ||= []
       @connect_args << args
@@ -212,6 +213,7 @@ def run_gc
       10.times do
         closed = @client.query("SHOW PROCESSLIST").none? { |row| row['Id'] == connection_id }
         break if closed
+
         sleep(0.1)
       end
       expect(closed).to eq(true)

spec/mysql2/result_spec.rb

@@ -497,17 +497,17 @@
     end
 
     {
-      'char_test' => 'CHAR',
-      'varchar_test' => 'VARCHAR',
-      'varbinary_test' => 'VARBINARY',
-      'tiny_blob_test' => 'TINYBLOB',
-      'tiny_text_test' => 'TINYTEXT',
-      'blob_test' => 'BLOB',
-      'text_test' => 'TEXT',
+      'char_test'        => 'CHAR',
+      'varchar_test'     => 'VARCHAR',
+      'varbinary_test'   => 'VARBINARY',
+      'tiny_blob_test'   => 'TINYBLOB',
+      'tiny_text_test'   => 'TINYTEXT',
+      'blob_test'        => 'BLOB',
+      'text_test'        => 'TEXT',
       'medium_blob_test' => 'MEDIUMBLOB',
       'medium_text_test' => 'MEDIUMTEXT',
-      'long_blob_test' => 'LONGBLOB',
-      'long_text_test' => 'LONGTEXT',
+      'long_blob_test'   => 'LONGBLOB',
+      'long_text_test'   => 'LONGTEXT',
     }.each do |field, type|
       it "should return a String for #{type}" do
         expect(test_result[field]).to be_an_instance_of(String)