How to Execute Bash Scripts from Go Effectively?

Executing Bash Scripts from Go

The Challenge

To execute a bash script from Go, you've attempted using the os/exec package but encountered challenges with inputting the script path or its content as arguments. This script sets variables and performs specific tasks.

The Solution

To successfully execute a bash script from Go, consider the following steps:

Prerequisites

• Ensure the bash script starts with #!/bin/sh or #!/bin/bash.
• Make the script executable by running chmod x .

Using the os/exec Package

If you prefer using os/exec, modify your code as follows:

cmd := exec.Command("/bin/sh", mongoToCsvSH)
out, err := cmd.Output()

Here, "/bin/sh" indicates the interpreter to execute the script, followed by the path to your bash script, mongoToCsvSH.

Alternative Approach

Instead of using os/exec, you can leverage the following code to execute the script:

import (
    "io/ioutil"
    "os"
)

func main() {
    content, err := ioutil.ReadFile("mongoToCsvSH.sh")
    if err != nil {
        log.Fatal(err)
    }

    err = os.WriteFile("run.sh", content, 0755)
    if err != nil {
        log.Fatal(err)
    }

    cmd := exec.Command("./run.sh")
    cmd.Run()
}

This approach reads the bash script content, writes it to a temporary "run.sh" file with executable permission (chmod 0755), and then executes it.

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