在同一shell golang中运行多个Exec命令 [英] Run Multiple Exec Commands in the same shell golang

问题描述

我在弄清楚如何使用os / exec软件包运行多个命令时遇到了麻烦。我已经摸索了净额和stackoverflow，却没有找到适合我的案例。这是我的信息来源：

I'm having trouble figuring out how to run multiple commands using the os/exec package. I've trolled the net and stackoverflow and haven't found anything that works for me case. Here's my source:

package main

import (
    _ "bufio"
    _ "bytes"
    _ "errors"
    "fmt"
    "log"
    "os"
    "os/exec"
    "path/filepath"
)

func main() {
    ffmpegFolderName := "ffmpeg-2.8.4"
    path, err := filepath.Abs("")
    if err != nil {
        fmt.Println("Error locating absulte file paths")
        os.Exit(1)
    }

    folderPath := filepath.Join(path, ffmpegFolderName)

    _, err2 := folderExists(folderPath)
    if err2 != nil {
        fmt.Println("The folder: %s either does not exist or is not in the same directory as make.go", folderPath)
        os.Exit(1)
    }
    cd := exec.Command("cd", folderPath)
    config := exec.Command("./configure", "--disable-yasm")
    build := exec.Command("make")

    cd_err := cd.Start()
    if cd_err != nil {
        log.Fatal(cd_err)
    }
    log.Printf("Waiting for command to finish...")
    cd_err = cd.Wait()
    log.Printf("Command finished with error: %v", cd_err)

    start_err := config.Start()
    if start_err != nil {
        log.Fatal(start_err)
    }
    log.Printf("Waiting for command to finish...")
    start_err = config.Wait()
    log.Printf("Command finished with error: %v", start_err)

    build_err := build.Start()
    if build_err != nil {
        log.Fatal(build_err)
    }
    log.Printf("Waiting for command to finish...")
    build_err = build.Wait()
    log.Printf("Command finished with error: %v", build_err)

}

func folderExists(path string) (bool, error) {
    _, err := os.Stat(path)
    if err == nil {
        return true, nil
    }
    if os.IsNotExist(err) {
        return false, nil
    }
    return true, err
}

我想要从终端执行命令。 cd路径； 。/配置; make
所以我需要按顺序运行每个命令，并等待最后一个命令完成后再继续。在当前版本的代码中，它当前表示 ./ configure：没有这样的文件或目录我认为这是因为cd路径已执行并且在新的shell中执行。 ，而不是与上一个命令位于同一目录中。有任何想法吗？
更新我通过更改工作目录然后执行./configure和make命令来解决了该问题

I want to the command like I would from terminal. cd path; ./configure; make So I need run each command in order and wait for the last command to finish before moving on. With my current version of the code it currently says that ./configure: no such file or directory I assume that is because cd path executes and in a new shell ./configure executes, instead of being in the same directory from the previous command. Any ideas? UPDATE I solved the issue by changing the working directory and then executing the ./configure and make command

err = os.Chdir(folderPath)
    if err != nil {
        fmt.Println("File Path Could not be changed")
        os.Exit(1)
    }

现在我还是很想知道是否有执行命令的方法

Still now i'm curious to know if there is a way to execute commands in the same shell.

推荐答案

如果要在单个shell实例中运行多个命令，则需要调用该shell像这样：

If you want to run multiple commands within a single shell instance, you will need to invoke the shell with something like this:

cmd := exec.Command("/bin/sh", "-c", "command1; command2; command3; ...")
err := cmd.Run()

这将使Shell解释给定的命令。它还将允许您执行诸如 cd 之类的shell内置函数。请注意，以安全的方式将用户数据替换为这些命令并非易事。

This will get the shell to interpret the given commands. It will also let you execute shell builtins like cd. Note that this can be non-trivial to substitute in user data to these commands in a safe way.

如果相反，您只想在特定目录中运行命令，您可以在没有外壳的情况下做到这一点。您可以设置当前工作目录以执行命令，如下所示：

If instead you just want to run a command in a particular directory, you can do that without the shell. You can set the current working directory to execute the command like so:

config := exec.Command("./configure", "--disable-yasm")
config.Dir = folderPath
build := exec.Command("make")
build.Dir = folderPath

...并像以前一样继续操作。

... and continue on like you were before.

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