大型app一般都施行业务分离，使用几个子工程构建各个业务线，但是这些子工程，都不会标注使用了那些Pod库，也没有PodFile，使用的Pod库都放在总的工程workspace里，所以如果想提取子工程里使用了哪些Pod库，是比较费劲的。

于是利用ruby脚本，遍历所有的.m，.h，.pch文件，找到所有的import引用，再解析出来是系统头文件的引用，还是Pod库的引用，最后打印所有去重结果即可

require 'fileutils'
require 'pathname'
require 'Find'

Encoding.default_external = Encoding.find('utf-8');
$realpath = Pathname.new(File.dirname(__FILE__)).realpath

$podArr = []
$sysFWArr = []
$nonFWList = [
    "Foundation",
    "UIKit",
    "objc",
    "sys",
    ]
$systemFWList = [
    "CoreLocation",
    "CoreMedia",
    "CoreGraphics",
    "CoreBluetooth",
    "CoreMotion",
    "PassKit",
    "QuartzCore",
    "WebKit",
    "MessageUI",
    "AddressBook",
    "AddressBookUI",
    "SafariServices",
    "AudioToolbox",
    "AssetsLibrary",
    "Accelerate",
    "AdSupport",
    "AVFoundation",
    "UserNotifications"
]

class PodTool

    def isNonImport(name)
        $nonFWList.each do |item|
            if item == name
                return true
            end
        end

        if name.include? "Business"
            return true
        end
        if name.include? "Platform"
            return true
        end
        return false
    end

    def isSystemImport(name)
        $systemFWList.each do |item|
            if item == name
                return true
            end
        end
        return false
    end

    def putArr(arr,podName)
        arr.each do |item|
            if item == podName
                return
            end
        end
        arr.push(podName)
    end

    def findPods(line)
        if ( line =~ /#import <(.*)\/.*>/ )
            name = $1
            if isNonImport(name)
                return
            end
            if isSystemImport(name)
                putArr($sysFWArr,name)
            else
                putArr($podArr,name)
            end
            
        end
    end

    def readFiles(path)

        Find.find(path) do |filename|

          if filename.include?(".h") or filename.include?(".m") or filename.include?(".pch")
            File.open(filename, "r") do |file|
                    file.each_line do|line| 
                        # puts line
                        if line.include? "#import <"
                            findPods(line)
                        elsif (line.include? "@interface") or (line.include? "@implementation")
                            break

                        end

                    end
            end
            
            # break
          end
          
        end

    end
  
end


PodTool.new.readFiles("#{$realpath}/FolderToFind")
puts "////////system framework////////////"
puts $sysFWArr
puts "////////3rd party pods////////////"
puts $podArr