rubocop_installer.rb

_xxx_rubocop_installer.rb

require 'bundler'

gems = Bundler::LockfileParser.new(Bundler.read_file("Gemfile.lock"))
rubocop_dependencies = gems.specs.map{|e| [e.name,e.version.to_s]}.select{|e| e.first.include?('rubocop') }

rubocop_dependencies.each do |gem|
  gem_ver = "#{gem[0]} -v #{gem[1]}"
  puts "executing: #{gem_ver}"
  abort("Failed to install: #{gem_ver}") unless system("gem install #{gem_ver}")
end