Update RuboCop to 0.50.x

.rubocop.yml

@@ -1,31 +1,35 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
+  TargetRubyVersion: 1.9
+
   DisplayCopNames: true
   Exclude:
     - 'pkg/**/*'
     - 'tmp/**/*'
     - 'vendor/**/*'
 
+Layout/CaseIndentation:
+  EnforcedStyle: end
+
+Layout/IndentHash:
+  EnforcedStyle: consistent
+
+Layout/IndentHeredoc:
+  EnforcedStyle: powerpack
+
 Lint/EndAlignment:
-  AlignWith: variable
+  EnforcedStyleAlignWith: variable
 
-Style/CaseIndentation:
-  IndentWhenRelativeTo: end
+Style/Encoding:
+  AutoCorrectEncodingComment: '# encoding: UTF-8'
+  EnforcedStyle: always
 
-Style/IndentHash:
-  EnforcedStyle: consistent
+Style/TrailingCommaInArguments:
+  EnforcedStyleForMultiline: consistent_comma
 
-Style/TrailingComma:
+Style/TrailingCommaInLiteral:
   EnforcedStyleForMultiline: consistent_comma
 
 Style/TrivialAccessors:
   AllowPredicates: true
-
-# TODO: remove when we end support for < 1.9.3
-
-Style/HashSyntax:
-  EnforcedStyle: hash_rockets
-
-Style/Lambda:
-  Enabled: false

.rubocop_todo.yml

@@ -1,75 +1,86 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2015-09-06 13:16:09 -0400 using RuboCop version 0.34.0.
+# on 2017-11-25 19:54:28 -0500 using RuboCop version 0.50.0.
 # 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: 2
 Metrics/AbcSize:
-  Max: 93
+  Max: 90
+
+# Offense count: 31
+# Configuration parameters: CountComments, ExcludedMethods.
+Metrics/BlockLength:
+  Max: 825
 
 # Offense count: 1
+# Configuration parameters: CountBlocks.
 Metrics/BlockNesting:
   Max: 5
 
 # Offense count: 1
+# Configuration parameters: CountComments.
 Metrics/ClassLength:
   Max: 125
 
-# Offense count: 2
+# Offense count: 3
 Metrics/CyclomaticComplexity:
   Max: 30
 
-# Offense count: 290
-# Configuration parameters: AllowURI, URISchemes.
+# Offense count: 313
+# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# URISchemes: http, https
 Metrics/LineLength:
   Max: 232
 
-# Offense count: 5
+# Offense count: 6
 # Configuration parameters: CountComments.
 Metrics/MethodLength:
-  Max: 60
+  Max: 57
 
-# Offense count: 1
+# Offense count: 2
 Metrics/PerceivedComplexity:
   Max: 27
 
-# Offense count: 40
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, ProceduralMethods, FunctionalMethods, IgnoredMethods.
-Style/BlockDelimiters:
-  Enabled: false
+# Offense count: 3
+# Configuration parameters: Blacklist.
+# Blacklist: END, (?-mix:EO[A-Z]{1})
+Naming/HeredocDelimiterNaming:
+  Exclude:
+    - 'tasks/compile.rake'
 
-# Offense count: 12
+# Offense count: 10
 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/field.rb'
     - 'lib/mysql2/result.rb'
     - 'lib/mysql2/statement.rb'
-    - 'lib/mysql2/version.rb'
 
-# Offense count: 9
+# Offense count: 14
 # Configuration parameters: AllowedVariables.
 Style/GlobalVars:
   Exclude:
     - 'ext/mysql2/extconf.rb'
 
-# Offense count: 14
+# Offense count: 17
 # Cop supports --auto-correct.
+# Configuration parameters: Strict.
 Style/NumericLiterals:
   MinDigits: 20
 
-# Offense count: 680
+# Offense count: 726
 # Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
+# Configuration parameters: EnforcedStyle, SupportedStyles, ConsistentQuotesInMultiline.
+# SupportedStyles: single_quotes, double_quotes
 Style/StringLiterals:
   Enabled: false

Gemfile

@@ -1,3 +1,5 @@
+# encoding: UTF-8
+
 source 'https://rubygems.org'
 
 gemspec
@@ -8,7 +10,9 @@ gem 'rake-compiler', '~> 1.0'
 group :test do
   gem 'eventmachine' unless RUBY_PLATFORM =~ /mswin|mingw/
   gem 'rspec', '~> 3.2'
-  gem 'rubocop', '~> 0.34.0'
+  # https://github.com/bbatsov/rubocop/pull/3328
+  # https://github.com/bbatsov/rubocop/pull/4789
+  gem 'rubocop', '~> 0.50.0' unless RUBY_VERSION =~ /1.9/
 end
 
 group :benchmarks do

Rakefile

@@ -1,4 +1,5 @@
 # encoding: UTF-8
+
 require 'rake'
 
 # Load custom tasks (careful attention to define tasks before prerequisites)
@@ -8,17 +9,11 @@ load 'tasks/compile.rake'
 load 'tasks/generate.rake'
 load 'tasks/benchmarks.rake'
 
-# TODO: remove engine check when rubinius stops crashing on RuboCop
-has_rubocop = if defined?(RUBY_ENGINE) && RUBY_ENGINE == 'ruby'
-  begin
-    require 'rubocop/rake_task'
-    RuboCop::RakeTask.new
-    task :default => [:spec, :rubocop]
-  rescue LoadError # rubocop:disable Lint/HandleExceptions
-  end
-end
-
-unless has_rubocop
+begin
+  require 'rubocop/rake_task'
+  RuboCop::RakeTask.new
+  task default: [:spec, :rubocop]
+rescue LoadError
   warn 'RuboCop is not available'
-  task :default => :spec
+  task default: :spec
 end

benchmark/active_record.rb

@@ -1,4 +1,5 @@
 # encoding: UTF-8
+
 $LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')
 
 require 'rubygems'
@@ -8,7 +9,7 @@
 ActiveRecord::Base.default_timezone = :local
 ActiveRecord::Base.time_zone_aware_attributes = true
 
-opts = { :database => 'test' }
+opts = { database: 'test' }
 
 class TestModel < ActiveRecord::Base
   self.table_name = 'mysql2_test'
@@ -17,12 +18,12 @@ class TestModel < ActiveRecord::Base
 batch_size = 1000
 
 Benchmark.ips do |x|
-  %w(mysql mysql2).each do |adapter|
-    TestModel.establish_connection(opts.merge(:adapter => adapter))
+  %w[mysql mysql2].each do |adapter|
+    TestModel.establish_connection(opts.merge(adapter: adapter))
 
     x.report(adapter) do
       TestModel.limit(batch_size).to_a.each do |r|
-        r.attributes.keys.each do |k|
+        r.attributes.each_key do |k|
           r.send(k.to_sym)
         end
       end

benchmark/active_record_threaded.rb

@@ -1,19 +1,20 @@
 # encoding: UTF-8
+
 $LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')
 
 require 'rubygems'
 require 'benchmark/ips'
 require 'active_record'
 
 number_of_threads = 25
-opts = { :database => 'test', :pool => number_of_threads }
+opts = { database: 'test', pool: number_of_threads }
 
 Benchmark.ips do |x|
-  %w(mysql mysql2).each do |adapter|
-    ActiveRecord::Base.establish_connection(opts.merge(:adapter => adapter))
+  %w[mysql mysql2].each do |adapter|
+    ActiveRecord::Base.establish_connection(opts.merge(adapter: adapter))
 
     x.report(adapter) do
-      number_of_threads.times.map do
+      Array.new(number_of_threads) do
         Thread.new { ActiveRecord::Base.connection.execute('SELECT SLEEP(1)') }
       end.each(&:join)
     end

benchmark/allocations.rb

@@ -1,4 +1,5 @@
 # encoding: UTF-8
+
 $LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')
 
 require 'rubygems'
@@ -13,7 +14,7 @@ class TestModel < ActiveRecord::Base
 
 def bench_allocations(feature, iterations = 10, batch_size = 1000)
   puts "GC overhead for #{feature}"
-  TestModel.establish_connection(:adapter => 'mysql2', :database => 'test')
+  TestModel.establish_connection(adapter: 'mysql2', database: 'test')
   GC::Profiler.clear
   GC::Profiler.enable
   iterations.times { yield batch_size }
@@ -23,7 +24,7 @@ def bench_allocations(feature, iterations = 10, batch_size = 1000)
 
 bench_allocations('coercion') do |batch_size|
   TestModel.limit(batch_size).to_a.each do |r|
-    r.attributes.keys.each do |k|
+    r.attributes.each_key do |k|
       r.send(k.to_sym)
     end
   end

benchmark/escape.rb

@@ -1,4 +1,5 @@
 # encoding: UTF-8
+
 $LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')
 
 require 'rubygems'
@@ -15,7 +16,7 @@ def run_escape_benchmarks(str)
       mysql.quote str
     end
 
-    mysql2 = Mysql2::Client.new(:host => "localhost", :username => "root")
+    mysql2 = Mysql2::Client.new(host: "localhost", username: "root")
     x.report "Mysql2 #{str.inspect}" do
       mysql2.escape str
     end

benchmark/query_with_mysql_casting.rb

@@ -1,4 +1,5 @@
 # encoding: UTF-8
+
 $LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')
 
 require 'rubygems'
@@ -41,10 +42,10 @@ def mysql_cast(type, value)
 debug = ENV['DEBUG']
 
 Benchmark.ips do |x|
-  mysql2 = Mysql2::Client.new(:host => "localhost", :username => "root")
+  mysql2 = Mysql2::Client.new(host: "localhost", username: "root")
   mysql2.query "USE #{database}"
   x.report "Mysql2" do
-    mysql2_result = mysql2.query sql, :symbolize_keys => true
+    mysql2_result = mysql2.query sql, symbolize_keys: true
     mysql2_result.each { |res| puts res.inspect if debug }
   end
 

benchmark/query_without_mysql_casting.rb

@@ -1,4 +1,5 @@
 # encoding: UTF-8
+
 $LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')
 
 require 'rubygems'
@@ -13,15 +14,15 @@
 debug = ENV['DEBUG']
 
 Benchmark.ips do |x|
-  mysql2 = Mysql2::Client.new(:host => "localhost", :username => "root")
+  mysql2 = Mysql2::Client.new(host: "localhost", username: "root")
   mysql2.query "USE #{database}"
   x.report "Mysql2 (cast: true)" do
-    mysql2_result = mysql2.query sql, :symbolize_keys => true, :cast => true
+    mysql2_result = mysql2.query sql, symbolize_keys: true, cast: true
     mysql2_result.each { |res| puts res.inspect if debug }
   end
 
   x.report "Mysql2 (cast: false)" do
-    mysql2_result = mysql2.query sql, :symbolize_keys => true, :cast => false
+    mysql2_result = mysql2.query sql, symbolize_keys: true, cast: false
     mysql2_result.each { |res| puts res.inspect if debug }
   end
 

benchmark/sequel.rb

@@ -1,4 +1,5 @@
 # encoding: UTF-8
+
 $LOAD_PATH.unshift File.expand_path(File.dirname(__FILE__) + '/../lib')
 
 require 'rubygems'