Clear Rail log in development env only cp it to Rails.root/config/initializers/

clear_log.rb

if Rails.env.development?
  MAX_LOG_SIZE = 10.megabytes

  logs = [File.join(Rails.root, 'log', 'development.log'), File.join(Rails.root, 'log', 'test.log')]
  logs.each do |log|
    if File.size?(log).to_i > MAX_LOG_SIZE
      $stdout.puts "Remove Log: #{log}"
      `rm #{log}`
    end
  end
end