golang 多线程查找文件内容

 package main

 import (
     "fmt"
     "io/ioutil"
     "os"
     "path/filepath"
     "strings"
 )

 var matchCount =
 var ch = make(chan int, )

 func findFile(path string, text string) {
     var pathArray []string
     var count =
     filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
         if err != nil {
         }
         //find text
         if !info.IsDir() {
             if info.Size() < * {
                 pathArray[count] = path
                 count++
                 if count >=  {
                     count =
                     go findText(pathArray[:], text)
                     <-ch
                 }
             }
         }
         return nil
     })
     go findText(pathArray[:count], text)
     <-ch

     fmt.Printf("一共发现了 %d 个匹配的文件", matchCount)

 }

 func findText(paths []string, text string) {
     for _, path := range paths {
         fi, err := os.Open(path)
         if err != nil {
             panic(err)
         }
         defer fi.Close()
         fd, err := ioutil.ReadAll(fi)
         if err != nil {
             panic(err)
         }

         if strings.Index(string(fd), text) > - {
             matchCount++
             fmt.Println(path)
         }
     }
     ch <-
 }

 func main() {
     args := os.Args
     if len(args) <  {
         fmt.Println("需要两个参数 path text")
         return
     }
     path := args[]
     text := args[]

     _, err := os.Stat(path)

     if err != nil {
         fmt.Println("path不存在")
     } else {
         findFile(path, text)
     }
 }

计数器增加的时候应该加锁