Golang Shell Script

go-shell-script.go

//usr/bin/env test -x $0 && (go build -o "${0}c" "$0" && "${0}c" $@; r=$?; rm -f "${0}c"; exit "$r"); exit "$?"
//
// The top "comment" defines shebang
// More over:
// * https://gist.github.com/posener/73ffd326d88483df6b1cb66e8ed1e0bd
// * https://getstream.io/blog/switched-python-go/

package main

import (
    "bytes"
    "fmt"
    "log"
    "os"
    "os/exec"
)

func main() {

    // List directory
    var cmd = Exec([]string{"ls", "-l"}...)

    // Print stdout
    fmt.Printf("out:\n%s\n", string(cmd.Stdout.(*bytes.Buffer).Bytes()))

    // Print stderr
    fmt.Printf("err:\n%s\n", string(cmd.Stderr.(*bytes.Buffer).Bytes()))

    // Return code.
    os.Exit(0)
}


func Exec(arg ...string) *exec.Cmd {
    
    var stdout, stderr bytes.Buffer
    cmd := exec.Command(arg[0], arg[1:]...)
    cmd.Stdout = &stdout
    cmd.Stderr = &stderr
    err := cmd.Run()

    if err != nil {
        log.Fatalf("cmd.Run() failed with %s\n", err)
    }

    return cmd
}