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main.go
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main.go
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package main
import (
"bufio"
"fmt"
"os"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/endpoints"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
)
type s3APIClient interface {
DeleteBucket(input *s3.DeleteBucketInput) (*s3.DeleteBucketOutput, error)
DeleteObject(input *s3.DeleteObjectInput) (*s3.DeleteObjectOutput, error)
ListObjectVersionsPages(input *s3.ListObjectVersionsInput, fn func(p *s3.ListObjectVersionsOutput, lastPage bool) bool) error
ListObjectsPages(input *s3.ListObjectsInput, fn func(p *s3.ListObjectsOutput, lastPage bool) bool) error
PutBucketPolicy(input *s3.PutBucketPolicyInput) (*s3.PutBucketPolicyOutput, error)
WaitUntilBucketNotExists(input *s3.HeadBucketInput) error
}
type app struct {
s3Client s3APIClient
bucketName string
}
func denyAllBucketPolicy(bucketName string) string {
policy := `{
"Version": "2012-10-17",
"Id": "S3DenyAllPutObjectPolicy",
"Statement": [
{
"Effect": "Deny",
"Principal": "*",
"Action": "s3:PutObject",
"Resource": [
"arn:aws:s3:::%[1]s",
"arn:aws:s3:::%[1]s/*"
]
}
]
}`
return fmt.Sprintf(policy, bucketName)
}
func (a *app) run() error {
// apply a deny all bucket policy to prevent further writes
_, err := a.s3Client.PutBucketPolicy(&s3.PutBucketPolicyInput{
Bucket: aws.String(a.bucketName),
Policy: aws.String(denyAllBucketPolicy(a.bucketName)),
})
if err != nil {
return err
}
// List all objects in the bucket
bucketContents := []*s3.Object{}
err = a.s3Client.ListObjectsPages(&s3.ListObjectsInput{
Bucket: aws.String(a.bucketName),
},
func(page *s3.ListObjectsOutput, lastPage bool) bool {
bucketContents = append(bucketContents, page.Contents...)
return !lastPage
})
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
// If the bucket doesn't exist, consider it a success and return
if aerr.Code() == s3.ErrCodeNoSuchBucket {
return nil
}
}
return fmt.Errorf("failed to list objects in bucket %s: err: %v", a.bucketName, err)
}
// Get every version of each object
objectVersions := []*s3.ObjectVersion{}
for _, object := range bucketContents {
err = a.s3Client.ListObjectVersionsPages(&s3.ListObjectVersionsInput{
Bucket: aws.String(a.bucketName),
Prefix: object.Key,
},
func(page *s3.ListObjectVersionsOutput, lastPage bool) bool {
objectVersions = append(objectVersions, page.Versions...)
return !lastPage
})
if err != nil {
return fmt.Errorf("failed to list object versions: %v. err: %v", object, err)
}
}
// for every object version, delete it
for _, version := range objectVersions {
_, err := a.s3Client.DeleteObject(&s3.DeleteObjectInput{
Bucket: aws.String(a.bucketName),
Key: version.Key,
VersionId: version.VersionId,
})
if err != nil {
return fmt.Errorf("failed to delete object: %v. err: %v", version, err)
}
}
_, err = a.s3Client.DeleteBucket(&s3.DeleteBucketInput{
Bucket: aws.String(a.bucketName),
})
if err != nil {
return err
}
err = a.s3Client.WaitUntilBucketNotExists(&s3.HeadBucketInput{
Bucket: aws.String(a.bucketName),
})
if err != nil {
return err
}
return nil
}
func main() {
if len(os.Args) < 3 {
fmt.Printf("Usage: %s BUCKETNAME REGION <really>\n\n", os.Args[0])
return
}
bucket := os.Args[1]
region := os.Args[2]
if !(len(os.Args) == 4 && os.Args[3] == "really") {
fmt.Printf("Confirm you want to delete bucket \"%s\"?\nType yes to continue: ", bucket)
input := bufio.NewScanner(os.Stdin)
input.Scan()
if input.Text() != "yes" {
fmt.Println("aborting")
return
}
}
sess := session.Must(session.NewSession(&aws.Config{
Region: aws.String(region),
STSRegionalEndpoint: endpoints.RegionalSTSEndpoint,
}))
s3Svc := s3.New(sess)
app := &app{
s3Client: s3Svc,
bucketName: bucket,
}
if err := app.run(); err != nil {
fmt.Println(err)
os.Exit(1)
}
os.Exit(0)
}