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package errz
import "fmt"
// UserError is an error that happened because the user messed something up:
// - invalid syntax
// - invalid configuration
type UserError struct {
// Message is a textual description of what's wrong.
// Must be suitable to show to the user.
Message string
// Cause optionally holds an underlying error.
Cause error
}
func NewUserError(msg string) error {
return UserError{
Message: msg,
}
}
func NewUserErrorf(format string, args ...interface{}) error {
return NewUserError(fmt.Sprintf(format, args...))
}
func NewUserErrorWithCause(cause error, msg string) error {
return UserError{
Message: msg,
Cause: cause,
}
}
func NewUserErrorWithCausef(cause error, format string, args ...interface{}) error {
return NewUserErrorWithCause(cause, fmt.Sprintf(format, args...))
}
func (e UserError) Error() string {
if e.Cause == nil {
return e.Message
}
if e.Message == "" {
return e.Cause.Error()
}
return fmt.Sprintf("%s: %v", e.Message, e.Cause)
}
func (e UserError) Unwrap() error {
return e.Cause
}
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