1# Writer Hooks for Logrus
2
3Send logs of given levels to any object with `io.Writer` interface.
4
5## Usage
6
7If you want for example send high level logs to `Stderr` and
8logs of normal execution to `Stdout`, you could do it like this:
9
10```go
11package main
12
13import (
14 "io/ioutil"
15 "os"
16
17 log "github.com/sirupsen/logrus"
18 "github.com/sirupsen/logrus/hooks/writer"
19)
20
21func main() {
22 log.SetOutput(ioutil.Discard) // Send all logs to nowhere by default
23
24 log.AddHook(&writer.Hook{ // Send logs with level higher than warning to stderr
25 Writer: os.Stderr,
26 LogLevels: []log.Level{
27 log.PanicLevel,
28 log.FatalLevel,
29 log.ErrorLevel,
30 log.WarnLevel,
31 },
32 })
33 log.AddHook(&writer.Hook{ // Send info and debug logs to stdout
34 Writer: os.Stdout,
35 LogLevels: []log.Level{
36 log.InfoLevel,
37 log.DebugLevel,
38 },
39 })
40 log.Info("This will go to stdout")
41 log.Warn("This will go to stderr")
42}
43```
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