Golang run command.go

package main

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

func runProgram1(program string, args ...string) (string, error) {
	outStrings, err := runProgram(program, args...)
	if err != nil {
		return "", err
	}
	if len(outStrings) == 0 {
		return "", nil
	}

	return outStrings[0], nil
}

func runProgram(program string, args ...string) ([]string, error) {

	//dlog("Running %v", cmdString(program, args))

	cmd := exec.Command(program, args...)

	out, err := cmd.Output()
	if err != nil {
		return nil, err
	}

	outString := string(out)
	if len(outString) == 0 {
		return nil, nil
	}

	outStrings := strings.Split(outString, "\n")
	return outStrings, nil
}

// Utils

func cmdString(program string, args []string) string {
	comps := make([]string, 0)

	comps = append(comps, program)

	for _, arg := range args {
		if strings.Contains(arg, " ") {
			comps = append(comps, fmt.Sprintf("'%v'", arg))
		} else {
			comps = append(comps, arg)
		}
	}

	result := strings.Join(comps, " ")
	return result
}