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hook.go
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hook.go
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// Copyright 2017 VMware, Inc. All Rights Reserved.
//
// 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 main
import (
"fmt"
"io"
"github.com/Sirupsen/logrus"
)
// ErrorHook is a simple logrus hook to duplicate Fatalf leveled error messages to stderr
type ErrorHook struct {
w io.Writer
}
// NewErrorHook returns an empty ErrorHook struct
func NewErrorHook(w io.Writer) *ErrorHook {
return &ErrorHook{w: w}
}
// Fire dumps the entry.Message to Stderr
func (hook *ErrorHook) Fire(entry *logrus.Entry) error {
err := fmt.Errorf("%s", entry.Message)
fmt.Fprintf(hook.w, string(sf.FormatError(err)))
return nil
}
// Levels returns the logging level that we want to subscribe
func (hook *ErrorHook) Levels() []logrus.Level {
return []logrus.Level{
logrus.FatalLevel,
}
}