| /* |
| 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 |
| } |