五一放假無(wú)聊，想把死神來(lái)了翻出來(lái)再看一遍，本來(lái)想在百度網(wǎng)盤(pán)上離線下載后在線看，結(jié)果百度表示種子文件有違禁文字不讓離線下載（莫非是死神二字?），突然想起之前寫(xiě)的一個(gè)改編種子文件名稱(chēng)的一個(gè)gem，就完善了一下。

• 首先創(chuàng)建一個(gè).gemspec文件，包含名稱(chēng)、版本等信息

Gem::Specification.new do |s|
  s.name        = 'torrent-rename'
  s.version     = '0.1.2'
  s.date        = '2016-05-02'
  s.summary     = "rename torrent file"
  s.description = "rename torrent file"
  s.authors     = ["secondrocker"]
  s.email       = 'secondrocker@gmail.com'
  s.files       = Dir['lib/**/*','bin/*']
  s.homepage    =
    'http://secondrocker.github.com'
  s.license     = 'MIT'
  s.executables = ['torrent-rename']
end

• 寫(xiě)測(cè)試用例,主要測(cè)試torrent格式的編碼

require "rspec"
require "torrent-rename"

describe "encode" do
  describe "int encode" do
    it " should equals the encode string" do
      expect(12.bencode).to eq("i12e")
    end
  end

  describe "string encode" do
    it "should equals the encode string" do
      expect("what".bencode).to eq("4:what")
    end
  end

  describe "hash encode" do
    it "should equals the encode string" do
      expect({"author"=>"wangdong","city"=>"beijing"}.bencode).to eq("d6:author8:wangdong4:city7:beijinge")
    end
  end

  describe "array encode" do
    it "should equals the encode array" do
      expect([1,2,3].bencode).to eq("li1ei2ei3ee")
    end
  end

  describe "bencode string decode" do
    it " should equals the obj" do
      expect("d4:name9:sishen3:agei12e5:filmsli1ei2ei3eee".bdecode).to eq({"name"=>"sishen","age"=>12,"films"=>[1,2,3]})
    end
  end
end

• 再創(chuàng)建lib文件夾，在目錄下創(chuàng)建用于替換文件名的torrent-rename.rb文件和對(duì)torrent文件進(jìn)行編碼、解碼、讀取的becoding.rb文件,代碼較長(zhǎng)、較爛，不再列出.
• 創(chuàng)建bin目錄添加torrent-rename文件，使安裝gem后可用 torrent-rename對(duì)種子文件進(jìn)行改編

#!/usr/bin/env ruby
$LOAD_PATH.unshift File.dirname(__FILE__) + '/../lib'

require 'torrent-rename.rb'
require 'pathname'
if ARGV.empty?
  puts "參數(shù)錯(cuò)誤"
else
  if ARGV[0] =~ /\.torrent$/
    if File.exists? ARGV[0]
      begin
        tf = TorrentRename.new ARGV[0]
        tf.replace_file
      rescue
        puts '種子文件不合法'
      end
    else
      puts ARGV[0].to_s +  "doesn't exist"
    end
  else
    puts "非種子文件!"
  end
end

• 執(zhí)行測(cè)試

Paste_Image.png

• 生成 gem

gem build torrent-rename.gemspec

• 發(fā)布到rubygem上

gem push torrent-rename-0.1.2.gem  

安裝gem后 執(zhí)行 torrent-rename 種子文件的絕對(duì)路徑，即可在其所在的目錄下生成一個(gè)改編過(guò)的新種子文件

完整代碼:https://github.com/secondrocker/torrent-rename