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package errors
import (
"net/url"
"github.com/pkg/errors"
)
// New creates a new error based on message. Wrapped so that this package does
// not appear in the stack trace.
var New = errors.New
// Errorf creates an error based on a format string and values. Wrapped so that
// this package does not appear in the stack trace.
var Errorf = errors.Errorf
// Wrap wraps an error retrieved from outside of restic. Wrapped so that this
// package does not appear in the stack trace.
var Wrap = errors.Wrap
// Wrapf returns an error annotating err with the format specifier. If err is
// nil, Wrapf returns nil.
var Wrapf = errors.Wrapf
// WithMessage annotates err with a new message. If err is nil, WithMessage
// returns nil.
var WithMessage = errors.WithMessage
// Cause returns the cause of an error. It will also unwrap certain errors,
// e.g. *url.Error returned by the net/http client.
func Cause(err error) error {
type Causer interface {
Cause() error
}
for {
// unwrap *url.Error
if urlErr, ok := err.(*url.Error); ok {
err = urlErr.Err
continue
}
// if err is a Causer, return the cause for this error.
if c, ok := err.(Causer); ok {
err = c.Cause()
continue
}
break
}
return err
}
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