Add rubocop and fix some offences

But mostly just tune .rubocop.yml LOL

.inch.yml

@@ -1,4 +1,4 @@
 files:
-  excluded: 
+  excluded:
     - lib/dry/core.rb
     - lib/dry/core/version.rb

.rubocop.yml

@@ -0,0 +1,27 @@
+AllCops:
+  TargetRubyVersion: 2.1
+  Exclude:
+    - 'dry-core.gemspec'
+    - 'spec/spec_helper.rb'
+
+Style/SignalException:
+  Exclude:
+    - 'spec/**/*'
+
+Style/RedundantSelf:
+  Exclude:
+    - 'lib/dry/core/deprecations.rb'
+
+Metrics/LineLength:
+  Max: 110
+
+Metrics/MethodLength:
+  Enabled: false
+
+Style/FileName:
+  Exclude:
+    - 'lib/dry-core.rb'
+
+Lint/AmbiguousRegexpLiteral:
+  Exclude:
+    - 'spec/**/*'

Gemfile

@@ -4,4 +4,5 @@ gemspec
 
 group :tools do
   gem 'byebug', platform: :mri
+  gem 'rubocop'
 end

dry-core.gemspec

@@ -8,7 +8,7 @@ Gem::Specification.new do |spec|
   spec.authors       = ['Nikita Shilnikov']
   spec.email         = ['fg@flashgordon.ru']
 
-  spec.summary       = %q{A toolset of small support modules used throughout the dry-rb ecosystem.}
+  spec.summary       = 'A toolset of small support modules used throughout the dry-rb ecosystem.'
   spec.description   = spec.summary
   spec.homepage      = 'https://github.com/dry-rb/dry-code'
   spec.license       = 'MIT'

lib/dry-core.rb

@@ -0,0 +1 @@
+require 'dry-core'

lib/dry/core.rb

@@ -1,6 +1,8 @@
-require "dry/core/version"
+require 'dry/core/version'
 
+# :nodoc:
 module Dry
+  # :nodoc:
   module Core
   end
 end

lib/dry/core/class_builder.rb

@@ -5,7 +5,7 @@ module Dry
       attr_reader :name
       attr_reader :parent
 
-      def initialize(name: , parent: Object)
+      def initialize(name:, parent: Object)
         @name = name
         @parent = parent
       end

lib/dry/core/deprecations.rb

@@ -65,7 +65,7 @@ module Dry
         def message(msg)
           <<-MSG
             #{msg}
-            #{caller.detect { |l| l !~ /(lib\/dry\/core)|(gems)/ }}
+            #{caller.detect { |l| l !~ %r{(lib/dry/core)|(gems)} }}
           MSG
         end
 

lib/dry/core/version.rb

@@ -1,5 +1,5 @@
 module Dry
   module Core
-    VERSION = '0.1.0'
+    VERSION = '0.1.0'.freeze
   end
 end

spec/dry/core/class_builder_spec.rb

@@ -30,11 +30,11 @@ RSpec.describe Dry::Core::ClassBuilder do
     end
 
     it 'yields created class' do
-      klass = builder.call { |yielded_class|
+      klass = builder.call do |yielded_class|
         yielded_class.class_eval do
           def self.testing; end
         end
-      }
+      end
 
       expect(klass).to respond_to(:testing)
     end

spec/dry/core/deprecations_spec.rb

@@ -32,10 +32,10 @@ RSpec.describe Dry::Core::Deprecations do
 
   shared_examples_for 'an entity with deprecated methods' do
     it 'deprecates method that is to be removed' do
-      res = subject.hello("world")
+      res = subject.hello('world')
 
-      expect(res).to eql("hello world")
-      expect(output).to match %r{\[spec\] Test(\.|#)hello is deprecated and will be removed}
+      expect(res).to eql('hello world')
+      expect(output).to match /\[spec\] Test(\.|#)hello is deprecated and will be removed/
       expect(output).to include('is no more')
     end
 
@@ -43,7 +43,7 @@ RSpec.describe Dry::Core::Deprecations do
       res = subject.logging('foo')
 
       expect(res).to eql('log: foo')
-      expect(output).to match %r{\[spec\] Test(\.|#)logging is deprecated and will be removed}
+      expect(output).to match /\[spec\] Test(\.|#)logging is deprecated and will be removed/
     end
   end
 
@@ -53,7 +53,7 @@ RSpec.describe Dry::Core::Deprecations do
         extend Dry::Core::Deprecations
 
         def self.name
-          "Test"
+          'Test'
         end
 
         def self.log(msg)
@@ -63,7 +63,7 @@ RSpec.describe Dry::Core::Deprecations do
         def self.hello(word)
           "hello #{word}"
         end
-        deprecate_class_method :hello, message: "is no more"
+        deprecate_class_method :hello, message: 'is no more'
 
         def self.logging(msg)
           "logging: #{msg}"
@@ -83,7 +83,7 @@ RSpec.describe Dry::Core::Deprecations do
         extend Dry::Core::Deprecations
 
         def self.name
-          "Test"
+          'Test'
         end
 
         def log(msg)
@@ -93,7 +93,7 @@ RSpec.describe Dry::Core::Deprecations do
         def hello(word)
           "hello #{word}"
         end
-        deprecate :hello, message: "is no more"
+        deprecate :hello, message: 'is no more'
 
         def logging(msg)
           "logging: #{msg}"