cocoapods 二

CocoaPods github地址
CocoaPods 官网地址

执行pod命令以后，调用了/usr/local/bin/pod文件，然后/usr/local/bin/pod又跳到了
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/bin/pod，看看这个文件。

  $ vi /Library/Ruby/Gems/2.0.0/gems/cocoapods-1.1.1/bin/pod 

  1 #!/usr/bin/env ruby
  2 
  3 if Encoding.default_external != Encoding::UTF_8
  4 
  5   if ARGV.include? '--no-ansi'
  6     STDERR.puts <<-DOC
  7     WARNING: CocoaPods requires your terminal to be using UTF-8 encoding.
  8     Consider adding the following to ~/.profile:
  9 
 10     export LANG=en_US.UTF-8
 11     DOC
 12   else
 13     STDERR.puts <<-DOC
 14     \e[33mWARNING: CocoaPods requires your terminal to be using UTF-8 encoding.
 15     Consider adding the following to ~/.profile:
 16 
 17     export LANG=en_US.UTF-8
 18     \e[0m
 19     DOC
 20   end
 21 
 22 end
 23 
 24 if $PROGRAM_NAME == __FILE__ && !ENV['COCOAPODS_NO_BUNDLER']
 25   ENV['BUNDLE_GEMFILE'] = File.expand_path('../../Gemfile', __FILE__)
 26   require 'rubygems'
 27   require 'bundler/setup'
 28   $LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
 29   puts "line 29"
 30 elsif ENV['COCOAPODS_NO_BUNDLER']
 31   require 'rubygems'
 32   gem 'cocoapods'
 33   puts "line 33"
 34 end
 35 
 36 STDOUT.sync = true if ENV['CP_STDOUT_SYNC'] == 'TRUE'
 37 
 38 require 'cocoapods'
 39 
 40 if profile_filename = ENV['PROFILE']
 41   puts "line 41"
 42   require 'ruby-prof'
 43   reporter =
 44     case (profile_extname = File.extname(profile_filename))
 45     when '.txt'
 46       RubyProf::FlatPrinterWithLineNumbers
 47     when '.html'
 48       RubyProf::GraphHtmlPrinter
 49     when '.callgrind'
 50       RubyProf::CallTreePrinter
 51     else
 52       raise "Unknown profiler format indicated by extension: #{profile_extname}"
 53     end
 54   File.open(profile_filename, 'w') do |io|
 55     reporter.new(RubyProf.profile { Pod::Command.run(ARGV) }).print(io)
 56   end
 57 else
 58   puts "line 58"
 59   Pod::Command.run(ARGV)
 60 end

因为有些地方不是太清楚，所以在这个文件里加入了一些输出语句，如puts "line 58"，看看最后那些分支被执行了。我的环境，输入只有 line 58，也就是最终执行了

Pod::Command.run(ARGV)

Pod是一个module，类似于命名空间吧，Command是一个类，run是方法名，ARGV是参数。也就是pod命令最终交给Podx下面的Command类的run方法去处理了，先看看Pod::Command这个类。

参考文章 CocoaPods 都做了什么？