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package multierr
import (
"fmt"
)
// code copy from github.com/hashicorp/go-multierror
// Error is an error type to track multiple errors. This is used to
// accumulate errors in cases and return them as a single "error".
type Error struct {
Errors []error
ErrorFormat ErrorFormatFunc
}
func (e *Error) Error() string {
fn := e.ErrorFormat
if fn == nil {
fn = ListFormatFunc
}
return fn(e.Errors)
}
// ErrorOrNil returns an error interface if this Error represents
// a list of errors, or returns nil if the list of errors is empty. This
// function is useful at the end of accumulation to make sure that the value
// returned represents the existence of errors.
func (e *Error) ErrorOrNil() error {
if e == nil {
return nil
}
if len(e.Errors) == 0 {
return nil
}
return e
}
func (e *Error) GoString() string {
return fmt.Sprintf("*%#v", *e)
}
// WrappedErrors returns the list of errors that this Error is wrapping.
// It is an implementation of the errwrap.Wrapper interface so that
// multierror.Error can be used with that library.
//
// This method is not safe to be called concurrently and is no different
// than accessing the Errors field directly. It is implemented only to
// satisfy the errwrap.Wrapper interface.
func (e *Error) WrappedErrors() []error {
return e.Errors
}
func New() *Error {
return &Error{}
}
func (e *Error) Append(errs ...error) {
// Go through each error and flatten
for _, item := range errs {
switch item := item.(type) {
case *Error:
if item != nil {
e.Errors = append(e.Errors, item.Errors...)
}
default:
if item != nil {
e.Errors = append(e.Errors, item)
}
}
}
}
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