Dump error info in Go

gistfile1.go

// imports: strings, reflect, syscall

func dumpError(err error, depth int) {
	indent := strings.Repeat(" ", depth*2)

 	errorType := reflect.TypeOf(err)
	errorValue := reflect.ValueOf(err)

 	if errorType.Kind() == reflect.Ptr {
 		errorType = errorType.Elem()
 		errorValue = errorValue.Elem()
 	}

 	log.Printf("%sGot error: '%s'\n", indent, err.Error())
 	log.Printf("%s==> Error Type: '%v'\n", indent, errorType)

 	var errno syscall.Errno

 	if errorType.Kind() == reflect.Struct {
 		log.Printf("%s==> Error Values:\n", indent)

 		for i := 0; i < errorType.NumField(); i++ {
 			field := errorType.Field(i)
 			value := errorValue.Field(i)
 			log.Printf("%s==> %s: %v", indent, field.Name, value.String())

 			if nestedError, ok := value.Interface().(error); ok {
 				s.dumpError(nestedError, depth+1)
			}
		}
	} else if errorType == reflect.TypeOf(errno) {
 		errno = errorValue.Interface().(syscall.Errno)
		log.Printf("%s==> Errno: %d\n", indent, errno)
		log.Printf("%s==> Message: %s\n", indent, errno)
	} else {
		log.Printf("%s==> Error Value:\n%s%v\n", indent, indent, errorValue.Interface())
	}
}