Rakefile in ohai-13.10.0 vs Rakefile in ohai-13.12.4

@@ -1,35 +1,42 @@
 require "bundler/gem_tasks"
-require "date"
-require "ohai/version"
 
 begin
   require "rspec/core/rake_task"
 
   RSpec::Core::RakeTask.new do |t|
     t.pattern = "spec/**/*_spec.rb"
   end
 rescue LoadError
   desc "rspec is not installed, this task is disabled"
   task :spec do
-    abort "rspec is not installed. `(sudo) gem install rspec` to run unit tests"
+    abort "rspec is not installed. bundle install first to make sure all dependencies are installed."
   end
 end
 
-task :default => :spec
-
-require "chefstyle"
-require "rubocop/rake_task"
-RuboCop::RakeTask.new(:style) do |task|
-  task.options += ["--display-cop-names", "--no-color"]
+begin
+  require "chefstyle"
+  require "rubocop/rake_task"
+  desc "Run Chefstyle tests"
+  RuboCop::RakeTask.new(:style) do |task|
+    task.options += ["--display-cop-names", "--no-color"]
+  end
+rescue LoadError
+  puts "chefstyle gem is not installed. bundle install first to make sure all dependencies are installed."
 end
 
 begin
-  require "github_changelog_generator/task"
-
-  GitHubChangelogGenerator::RakeTask.new :changelog do |config|
-    config.future_release = Ohai::VERSION
-    config.max_issues = 0
-    config.add_issues_wo_labels = false
-  end
+  require "yard"
+  YARD::Rake::YardocTask.new(:docs)
 rescue LoadError
+  puts "yard is not available. bundle install first to make sure all dependencies are installed."
 end
+
+task :console do
+  require "irb"
+  require "irb/completion"
+  require "ohai"
+  ARGV.clear
+  IRB.start
+end
+
+task default: [:style, :spec]