-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
151 lines (127 loc) · 3.62 KB
/
main.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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
// usage: s3-cp-small-bucket [-d] path/to/config.json
package main
import (
"context"
"encoding/json"
"errors"
"flag"
"fmt"
"log"
"os"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
)
type creds struct {
AccessKeyID string `json:"access_key_id"`
SecretAccessKey string `json:"secret_access_key"`
}
type bucket struct {
Endpoint string `json:"endpoint"`
Region string `json:"region"`
Credentials creds `json:"credentials"`
Name string `json:"name"`
}
type config struct {
Destination bucket `json:"destination"`
Source bucket `json:"source"`
}
func main() {
dryRun := flag.Bool("d", true, "print the object keys it would upload")
flag.Parse()
ctx := context.TODO()
if flag.NArg() != 2 {
log.Fatalln("not enough/too many args")
}
b, err := os.ReadFile(flag.Arg(1))
if err != nil {
log.Panicf("ReadFile: %v", err)
}
var runningConfig config
if err = json.Unmarshal(b, &runningConfig); err != nil {
log.Panicf("Unmarshal: %v", err)
}
dst, err := initClient(runningConfig.Destination)
if err != nil {
log.Panicf("initClient (destination): %v", err)
}
src, err := initClient(runningConfig.Source)
if err != nil {
log.Panicf("initClient (source): %v", err)
}
dstBucket, srcBucket := runningConfig.Destination.Name, runningConfig.Source.Name
paths, err := listPaths(ctx, src, srcBucket)
if err != nil {
log.Panicf("listPaths: %v", err)
}
if err = copyObjects(ctx, dst, src, dstBucket, srcBucket, paths, *dryRun); err != nil {
log.Panicf("copyObjects: %v", err)
}
}
func initClient(b bucket) (*s3.S3, error) {
session, err := session.NewSession(&aws.Config{
Endpoint: aws.String(b.Endpoint),
Region: aws.String(b.Region),
Credentials: credentials.NewCredentials(
&credentials.StaticProvider{
Value: credentials.Value{
AccessKeyID: b.Credentials.AccessKeyID,
SecretAccessKey: b.Credentials.SecretAccessKey,
},
}),
})
if err != nil {
return nil, err
}
return s3.New(session), nil
}
func listPaths(ctx context.Context, client *s3.S3, bucket string) (paths []string, err error) {
err = client.ListObjectsV2PagesWithContext(ctx, &s3.ListObjectsV2Input{
Bucket: aws.String(bucket),
}, func(out *s3.ListObjectsV2Output, b bool) bool {
for _, o := range out.Contents {
paths = append(paths, aws.StringValue(o.Key))
}
return true
})
return paths, err
}
func copyObjects(ctx context.Context, dstClient, srcClient *s3.S3, dstBucket, srcBucket string, paths []string, dryRun bool) error {
for _, p := range paths {
srcOut, err := srcClient.GetObjectWithContext(ctx, &s3.GetObjectInput{
Bucket: aws.String(srcBucket),
Key: aws.String(p),
})
if err != nil {
return fmt.Errorf("failed while getting %s: %w", p, err)
}
release := func() error {
if err = srcOut.Body.Close(); err != nil {
return fmt.Errorf("failed while closing %s: %w", p, err)
}
return nil
}
if dryRun {
log.Printf("Would upload %s (%s)", p, aws.StringValue(srcOut.ETag))
if err = release(); err != nil {
return err
}
continue
}
log.Printf("Uploading %s (%s)", p, aws.StringValue(srcOut.ETag))
dstOut, err := dstClient.PutObjectWithContext(ctx, &s3.PutObjectInput{
Body: aws.ReadSeekCloser(srcOut.Body),
Bucket: aws.String(dstBucket),
Key: aws.String(p),
})
if err != nil {
return fmt.Errorf("falied while putting %s: %w", p, errors.Join(err, release()))
}
if err = release(); err != nil {
return err
}
log.Printf("Successfully uploaded %s (%s)", p, aws.StringValue(dstOut.ETag))
}
return nil
}