/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package util

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

func Exec(arg, dir string) (string, error) {
	osEnv := runtime.GOOS
	var cmd *exec.Cmd
	switch osEnv {
	case "darwin", "linux":
		cmd = exec.Command("sh", "-c", arg)
	case "windows":
		cmd = exec.Command("cmd.exe", "/c", arg)
	default:
		return "", fmt.Errorf("unexpected os: %v", osEnv)
	}
	if len(dir) > 0 {
		cmd.Dir = dir
	}
	output, err := cmd.CombinedOutput()
	return string(output), err
}