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- package multierror
-
- import (
- "fmt"
-
- "github.com/hashicorp/errwrap"
- )
-
- // Prefix is a helper function that will prefix some text
- // to the given error. If the error is a multierror.Error, then
- // it will be prefixed to each wrapped error.
- //
- // This is useful to use when appending multiple multierrors
- // together in order to give better scoping.
- func Prefix(err error, prefix string) error {
- if err == nil {
- return nil
- }
-
- format := fmt.Sprintf("%s {{err}}", prefix)
- switch err := err.(type) {
- case *Error:
- // Typed nils can reach here, so initialize if we are nil
- if err == nil {
- err = new(Error)
- }
-
- // Wrap each of the errors
- for i, e := range err.Errors {
- err.Errors[i] = errwrap.Wrapf(format, e)
- }
-
- return err
- default:
- return errwrap.Wrapf(format, err)
- }
- }
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