Ruby在复制文件时显示进度

require 'fileutils'

def copy_with_progress(src, dest)
  File.open(src, 'rb') do |input|
    File.open(dest, 'wb') do |output|
      buffer = ''
      input_size = input.size
      total_bytes_copied = 0

      while input.read(1024, buffer)
        output.write(buffer)
        total_bytes_copied += buffer.size
        progress = (total_bytes_copied.to_f / input_size.to_f) * 100
        print "\r复制进度: #{progress.round(2)}%"
      end
    end
  end
  puts "\n复制完成"
end

src = 'source_file.txt'
dest = 'destination_file.txt'

copy_with_progress(src, dest)