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restic/internal/errors/errors.go
greatroar e5f0f67ba0 Modernize error handling in local backend
* Stop prepending the operation name: it's already part of os.PathError,
  leading to repetitive errors like "Chmod: chmod /foo/bar: operation not
  permitted".

* Use errors.Is to check for specific errors.
2021-06-18 11:13:27 +02:00

55 lines
1.3 KiB
Go

package errors
import (
"net/url"
"github.com/cenkalti/backoff/v4"
"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
var WithStack = errors.WithStack
// 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 {
switch e := err.(type) {
case Causer: // github.com/pkg/errors
err = e.Cause()
case *backoff.PermanentError:
err = e.Err
case *url.Error:
err = e.Err
default:
return err
}
}
}
// Go 1.13-style error handling.
func Is(x, y error) bool { return errors.Is(x, y) }