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