/
logwriter.go
63 lines (53 loc) · 1.05 KB
/
logwriter.go
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
package crun
import (
"bytes"
"io"
"strconv"
"strings"
"sync"
"time"
)
type logWriter struct {
writer io.Writer
c *Crun
midOfLine bool
m *sync.Mutex
}
func newLogWriter(w io.Writer, c *Crun) *logWriter {
return &logWriter{
writer: w,
c: c,
m: &sync.Mutex{},
}
}
func (w *logWriter) Write(buf []byte) (int, error) {
w.m.Lock()
defer w.m.Unlock()
if w.c.Config.LogPrefix == "" {
return w.writer.Write(buf)
}
var bb bytes.Buffer
for i, chr := range buf {
if !w.midOfLine {
bb.Write(w.prefixBytes())
w.midOfLine = true
}
if chr == '\n' {
w.midOfLine = false
}
bb.Write(buf[i : i+1])
}
w.writer.Write(bb.Bytes())
return len(buf), nil
}
const ts = "2006-01-02T15:04:05.000Z07:00"
func (w *logWriter) prefixBytes() []byte {
c := w.c
str := w.c.Config.LogPrefix
t := time.Now()
tsstr := t.Format(ts)
str = strings.Replace(str, "%time", tsstr, -1)
str = strings.Replace(str, "%tag", c.Config.Tag, -1)
str = strings.Replace(str, "%pid", strconv.Itoa(c.Report.Pid), -1)
return []byte(str)
}