go - 如何将 tar 文件放入 golang 的 tar 文件中

Question

我想创建一个 tar 文件，我想在该 tar 文件中放入其他 tar 文件。层次结构类似于

TopLevelTar.tar.gz
    |-->primary/primary.tar
    |-->secondary/secondaty.tar
    |-->tertiary/tertiary.tar

我怎样才能在 golag 中做到这一点？

Answer 1

我想这可能对您有所帮助。基本上，这个解决方案是从多个文件创建一个 tarball。您只需提供文件路径即可代替 a.go 和 b.go 等

package main

import (
    "archive/tar"
    "compress/gzip"
    "io"
    "log"
    "os"
)

func addFile(tw *tar.Writer, path string) error {
    file, err := os.Open(path)
    if err != nil {
        return err
    }
    defer file.Close()
    if stat, err := file.Stat(); err == nil {
        // now lets create the header as needed for this file within the tarball
        header := new(tar.Header)
        header.Name = path
        header.Size = stat.Size()
        header.Mode = int64(stat.Mode())
        header.ModTime = stat.ModTime()
        // write the header to the tarball archive
        if err := tw.WriteHeader(header); err != nil {
            return err
        }
        // copy the file data to the tarball
        if _, err := io.Copy(tw, file); err != nil {
            return err
        }
    }
    return nil
}

func main() {
    // set up the output file
    file, err := os.Create("output.tar.gz")
    if err != nil {
        log.Fatalln(err)
    }
    defer file.Close()
    // set up the gzip writer
    gw := gzip.NewWriter(file)
    defer gw.Close()
    tw := tar.NewWriter(gw)
    defer tw.Close()
    // grab the paths that need to be added in
    paths := []string{
        "a.go",
        "b.go",
    }
    // add each file as needed into the current tar archive
    for i := range paths {
        if err := addFile(tw, paths[i]); err != nil {
            log.Fatalln(err)
        }
    }
}