namespace :log do desc "Truncates all *.log files in log/ to zero bytes (specify which logs with LOGS=test,development)" task :clear do log_files.each do |file| clear_log_file(file) end end def log_files if ENV['LOGS'] ENV['LOGS'].split(',') .map { |file| "log/#{file.strip}.log" } .select { |file| File.exist?(file) } else FileList["log/*.log"] end end def clear_log_file(file) f = File.open(file, "w") f.close end end