Go 언어의 동시 파일에 대한 파일 시스템 파일 콘텐츠 검색 및 정규식 일치 문제를 어떻게 처리합니까?

func searchInFile(filePath string, keyword string, resultChan chan<- string) {
    file, err := os.Open(filePath)
    if err != nil {
        log.Fatal(err)
    }
    defer file.Close()

    scanner := bufio.NewScanner(file)
    for scanner.Scan() {
        line := scanner.Text()
        if strings.Contains(line, keyword) {
            resultChan <- filePath // 将包含关键字的文件路径发送到通道中
            break
        }
    }

    if err := scanner.Err(); err != nil {
        log.Fatal(err)
    }
}

func searchInDirectory(dirPath string, keyword string) []string {
    resultChan := make(chan string)
    var wg sync.WaitGroup

    files, err := ioutil.ReadDir(dirPath)
    if err != nil {
        log.Fatal(err)
    }

    for _, file := range files {
        if !file.IsDir() {
            filePath := filepath.Join(dirPath, file.Name())
            wg.Add(1)
            go func() {
                defer wg.Done()
                searchInFile(filePath, keyword, resultChan)
            }()
        }
    }

    go func() {
        wg.Wait()
        close(resultChan) // 关闭通道
    }()

    var searchResults []string
    for filePath := range resultChan {
        searchResults = append(searchResults, filePath)
    }

    return searchResults
}

results := searchInDirectory("/path/to/directory", "hello")
for _, file := range results {
    fmt.Println(file)
}

func matchRegexInFile(filePath string, regex string, resultChan chan<- string) {
    file, err := os.Open(filePath)
    if err != nil {
        log.Fatal(err)
    }
    defer file.Close()

    scanner := bufio.NewScanner(file)
    for scanner.Scan() {
        line := scanner.Text()
        if ok, _ := regexp.MatchString(regex, line); ok {
            resultChan <- filePath
            break
        }
    }

    if err := scanner.Err(); err != nil {
        log.Fatal(err)
    }
}

func matchRegexInDirectory(dirPath string, regex string) []string {
    resultChan := make(chan string)
    var wg sync.WaitGroup

    files, err := ioutil.ReadDir(dirPath)
    if err != nil {
        log.Fatal(err)
    }

    for _, file := range files {
        if !file.IsDir() {
            filePath := filepath.Join(dirPath, file.Name())
            wg.Add(1)
            go func() {
                defer wg.Done()
                matchRegexInFile(filePath, regex, resultChan)
            }()
        }
    }

    go func() {
        wg.Wait()
        close(resultChan)
    }()

    var matchResults []string
    for filePath := range resultChan {
        matchResults = append(matchResults, filePath)
    }

    return matchResults
}

results := matchRegexInDirectory("/path/to/directory", "^hello")
for _, file := range results {
    fmt.Println(file)
}