/*
Copyright 2016 The Rook Authors. All rights reserved.

Licensed 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 exec

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

type CommandError struct {
	ActionName string
	Err        error
}

func (e *CommandError) Error() string {
	var exitErrMsg string
	if exitErr, ok := e.Err.(*exec.ExitError); ok {
		// the error is an ExitError, include the stderr output in the final error output
		exitErrMsg = string(exitErr.Stderr)
	}

	return fmt.Sprintf("Failed to complete '%s': %+v. %s", e.ActionName, e.Err, exitErrMsg)
}

func (e *CommandError) ExitStatus() int {
	exitStatus := -1
	exitErr, ok := e.Err.(*exec.ExitError)
	if ok {
		waitStatus, ok := exitErr.ProcessState.Sys().(syscall.WaitStatus)
		if ok {
			exitStatus = waitStatus.ExitStatus()
		}
	}
	return exitStatus
}

func createCommandError(err error, actionName string) error {
	return &CommandError{ActionName: actionName, Err: err}
}