Go语言中如何处理并发文件的文件系统文件切割和文件合并问题？

package main

import (
    "os"
    "fmt"
    "io"
)

// 切割文件
func splitFile(filename string, chunkSize int64) ([]string, error) {
    file, err := os.Open(filename)
    if err != nil {
        return nil, err
    }
    defer file.Close()

    // 创建保存切割后文件的文件夹
    err = os.MkdirAll("chunks", os.ModePerm)
    if err != nil {
        return nil, err
    }
    
    var chunks []string

    buffer := make([]byte, chunkSize)
    for i := 0; ; i++ {
        n, err := file.Read(buffer)
        if err == io.EOF {
            break
        }
        if err != nil {
            return nil, err
        }

        chunkFilename := fmt.Sprintf("chunks/chunk%d", i)
        chunkFile, err := os.Create(chunkFilename)
        if err != nil {
            return nil, err
        }
        _, err = chunkFile.Write(buffer[:n])
        if err != nil {
            return nil, err
        }
        chunkFile.Close()

        chunks = append(chunks, chunkFilename)
    }

    return chunks, nil
}

package main

import (
    "os"
    "fmt"
    "sync"
)

// 并发处理文件
func processChunks(chunks []string) {
    var wg sync.WaitGroup
    wg.Add(len(chunks))

    for _, chunk := range chunks {
        go func(chunk string) {
            // 处理小块文件，这里省略具体处理逻辑
            fmt.Println("Processing: ", chunk)
            // ......

            // 处理完成后删除小块文件
            err := os.Remove(chunk)
            if err != nil {
                fmt.Println("Failed to remove chunk: ", err)
            }

            wg.Done()
        }(chunk)
    }

    wg.Wait()
}

package main

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

// 合并文件
func mergeFiles(chunks []string, filename string) error {
    file, err := os.Create(filename)
    if err != nil {
        return err
    }
    defer file.Close()

    for _, chunk := range chunks {
        chunkFile, err := os.Open(chunk)
        if err != nil {
            return err
        }

        _, err = io.Copy(file, chunkFile)
        if err != nil {
            return err
        }

        chunkFile.Close()

        // 删除小块文件
        err = os.Remove(chunk)
        if err != nil {
            fmt.Println("Failed to remove chunk: ", err)
        }
    }

    return nil
}