Golang Run Command Line

The Go/Golang codes below executed successfully in Ubuntu.

package main

import (
  "fmt"
  "os/exec"
  "strings"
)

func main() {
  app := "date"

  arg0 := "-d"
  arg1 := "3 Jan 2009 12:34:56 AM"
  arg2 := "+%Y-%m-%d %H:%M:%S"

  cmd := exec.Command(app, arg0, arg1, arg2)
  stdout, err := cmd.Output()

  if err != nil {
    panic(err)
  }

  fmt.Print(strings.TrimSpace(string(stdout)))
}

If the commands involves pipe ( | ), I prefer to have it written in bash script and have Golang just execute the bash script.

func Bash(cmd string) string{
  strUUID := uuid.New().String()
  strPath := fmt.Sprintf("/tmp/%s.sh", strUUID)
  ioutil.WriteFile(strPath, []byte(cmd), 0744)
  out,err := exec.Command("/bin/bash", strPath).CombinedOutput()
  check(err)
  os.Remove(strPath)
  return string(out[:])
}

uuid is available at github.com/google/uuid

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