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