mirror of https://github.com/k3s-io/k3s
51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
|
/*
|
||
|
|
Copyright 2015 The Kubernetes Authors.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package generator
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ErrorTracker tracks errors to the underlying writer, so that you can ignore
|
||
|
|
// them until you're ready to return.
|
||
|
|
type ErrorTracker struct {
|
||
|
|
io.Writer
|
||
|
|
err error
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewErrorTracker makes a new error tracker; note that it implements io.Writer.
|
||
|
|
func NewErrorTracker(w io.Writer) *ErrorTracker {
|
||
|
|
return &ErrorTracker{Writer: w}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Write intercepts calls to Write.
|
||
|
|
func (et *ErrorTracker) Write(p []byte) (n int, err error) {
|
||
|
|
if et.err != nil {
|
||
|
|
return 0, et.err
|
||
|
|
}
|
||
|
|
n, err = et.Writer.Write(p)
|
||
|
|
if err != nil {
|
||
|
|
et.err = err
|
||
|
|
}
|
||
|
|
return n, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Error returns nil if no error has occurred, otherwise it returns the error.
|
||
|
|
func (et *ErrorTracker) Error() error {
|
||
|
|
return et.err
|
||
|
|
}
|