From 50e7b594428714f14761590c04b7e86612d3580a Mon Sep 17 00:00:00 2001
From: Rob Watson <rob@netflux.io>
Date: Fri, 12 Nov 2021 03:18:15 +0100
Subject: [PATCH] Add s3-delete-all command

---
 backend/cmd/s3-delete-all/main.go | 86 +++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 backend/cmd/s3-delete-all/main.go

diff --git a/backend/cmd/s3-delete-all/main.go b/backend/cmd/s3-delete-all/main.go
new file mode 100644
index 0000000..31104b3
--- /dev/null
+++ b/backend/cmd/s3-delete-all/main.go
@@ -0,0 +1,86 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"log"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/config"
+	"github.com/aws/aws-sdk-go-v2/service/s3"
+	"github.com/aws/smithy-go"
+)
+
+const cmdName = "s3-delete-all"
+
+func main() {
+	var err error
+	ctx := context.Background()
+
+	cfg, err := config.LoadDefaultConfig(ctx)
+	if err != nil {
+		log.Fatal(err)
+	}
+	s3Client := s3.NewFromConfig(cfg)
+
+	var bucket string
+	flag.StringVar(&bucket, "bucket", "", "name of S3 bucket")
+	flag.Parse()
+	if bucket == "" {
+		log.Fatalf("usage: %s -bucket bucket", cmdName)
+	}
+
+	// Delete S3 objects
+
+	listObjectsInput := s3.ListObjectsV2Input{Bucket: aws.String(bucket), MaxKeys: 10_000}
+	listObjectsOutput, err := s3Client.ListObjectsV2(ctx, &listObjectsInput)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for _, object := range listObjectsOutput.Contents {
+		deleteObjectInput := s3.DeleteObjectInput{Bucket: aws.String(bucket), Key: object.Key}
+		_, err = s3Client.DeleteObject(ctx, &deleteObjectInput)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		log.Printf("Deleted object %s", *object.Key)
+	}
+
+	// Delete S3 uploads and parts
+
+	listUploadsInput := s3.ListMultipartUploadsInput{Bucket: aws.String(bucket)}
+	listUploadsOutput, err := s3Client.ListMultipartUploads(ctx, &listUploadsInput)
+	if err != nil {
+		log.Fatal(err)
+	}
+	if listObjectsOutput.IsTruncated {
+		log.Fatal("TODO: handle IsTruncated")
+	}
+
+	for _, upload := range listUploadsOutput.Uploads {
+		abortUploadInput := s3.AbortMultipartUploadInput{Bucket: aws.String(bucket), Key: upload.Key, UploadId: upload.UploadId}
+		_, err := s3Client.AbortMultipartUpload(ctx, &abortUploadInput)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		listPartsInput := s3.ListPartsInput{Bucket: aws.String(bucket), Key: upload.Key, UploadId: upload.UploadId}
+		listPartsOutput, err := s3Client.ListParts(ctx, &listPartsInput)
+		if err != nil {
+			var ae smithy.APIError
+			if errors.As(err, &ae) && ae.ErrorCode() == "NoSuchUpload" {
+				log.Printf("Ignoring upload not found (id = %s)", *upload.UploadId)
+				continue
+			}
+			log.Fatal(err)
+		}
+		if len(listPartsOutput.Parts) > 0 {
+			log.Fatalf("some parts remain for key %s, upload %s (count = %d)", *upload.UploadId, *upload.Key, len(listPartsOutput.Parts))
+		}
+
+		log.Printf("Aborted upload %s", *upload.UploadId)
+	}
+}