-
Notifications
You must be signed in to change notification settings - Fork 1
/
logTailer.go
69 lines (58 loc) · 1.11 KB
/
logTailer.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
64
65
66
67
68
69
package cloudbuild
import (
"context"
"fmt"
"io/ioutil"
"strings"
"github.com/urvil38/kubepaas/banner"
)
type logTailer struct {
logBucket string
logObject string
cursor int
}
func NewLogTailer(logBucket, logObject string) *logTailer {
return &logTailer{
logBucket: logBucket,
logObject: logObject,
cursor: 0,
}
}
func (l *logTailer) Poll(isLast bool) {
client, err := getCloudBuildLogStorageClient()
if err != nil {
fmt.Print(err)
}
res, err := client.Bucket(l.logBucket).Object(l.logObject).NewRangeReader(context.Background(), int64(l.cursor), -1)
if err != nil {
if isLast {
printLastLine()
}
return
}
if res != nil {
b, err := ioutil.ReadAll(res)
defer res.Close()
if err != nil {
fmt.Print(err)
}
if l.cursor == 0 && !isLast && len(b) > 0 {
printFirstLine()
}
l.cursor += len(b)
fmt.Println(strings.TrimRight(string(b), "\n"))
if isLast && len(b) > 0 {
printLastLine()
return
}
}
if isLast {
printLastLine()
}
}
func printFirstLine() {
fmt.Println(banner.StartCloudBuildLog())
}
func printLastLine() {
fmt.Println(banner.EndCloudBuildLog())
}