1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build !disable_events
// Package logrus provides a logrus Formatter for events.
// To use for the global logger:
//
// logrus.SetFormatter(elogrus.NewFormatter(exporter))
// logrus.SetOutput(io.Discard)
//
// and for a Logger instance:
//
// logger.SetFormatter(elogrus.NewFormatter(exporter))
// logger.SetOutput(io.Discard)
//
// If you call elogging.SetExporter, then you can pass nil
// for the exporter above and it will use the global one.
package logrus
import (
"context"
"github.com/sirupsen/logrus"
"golang.org/x/exp/event"
"golang.org/x/exp/event/severity"
)
type formatter struct{}
func NewFormatter() logrus.Formatter {
return &formatter{}
}
var _ logrus.Formatter = (*formatter)(nil)
// Format writes an entry to an event.Exporter. It always returns nil (see below).
// If e.Context is non-nil, Format gets the exporter from the context. Otherwise
// it uses the default exporter.
//
// Logrus first calls the Formatter to get a []byte, then writes that to the
// output. That doesn't work for events, so we subvert it by having the
// Formatter export the event (and thereby write it). That is why the logrus
// Output io.Writer should be set to io.Discard.
func (f *formatter) Format(e *logrus.Entry) ([]byte, error) {
ctx := e.Context
if ctx == nil {
ctx = context.Background()
}
ev := event.New(ctx, event.LogKind)
if ev == nil {
return nil, nil
}
ev.At = e.Time
ev.Labels = append(ev.Labels, convertLevel(e.Level).Label())
for k, v := range e.Data {
ev.Labels = append(ev.Labels, event.Value(k, v))
}
ev.Labels = append(ev.Labels, event.String("msg", e.Message))
ev.Deliver()
return nil, nil
}
func convertLevel(level logrus.Level) severity.Level {
switch level {
case logrus.PanicLevel:
return severity.Fatal + 1
case logrus.FatalLevel:
return severity.Fatal
case logrus.ErrorLevel:
return severity.Error
case logrus.WarnLevel:
return severity.Warning
case logrus.InfoLevel:
return severity.Info
case logrus.DebugLevel:
return severity.Debug
case logrus.TraceLevel:
return severity.Trace
default:
return severity.Trace
}
}
|
