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mirror of https://github.com/octoleo/restic.git synced 2024-12-23 03:18:55 +00:00
restic/internal/errors/errors.go
greatroar f92ecf13c9 all: Move away from pkg/errors, easy cases
github.com/pkg/errors is no longer getting updates, because Go 1.13
went with the more flexible errors.{As,Is} function. Use those instead:
errors from pkg/errors already support the Unwrap interface used by 1.13
error handling. Also:

* check for io.EOF with a straight ==. That value should not be wrapped,
  and the chunker (whose error is checked in the cases changed) does not
  wrap it.
* Give custom Error methods pointer receivers, so there's no ambiguity
  when type-switching since the value type will no longer implement error.
* Make restic.ErrAlreadyLocked private, and rename it to
  alreadyLockedError to match the stdlib convention that error type
  names end in Error.
* Same with rest.ErrIsNotExist => rest.notExistError.
* Make s3.Backend.IsAccessDenied a private function.
2022-06-14 08:36:38 +02:00

58 lines
1.4 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 As(err error, tgt interface{}) bool { return errors.As(err, tgt) }
func Is(x, y error) bool { return errors.Is(x, y) }