Add rmbook tool

2 files changed, 95 insertions, 0 deletions

diff --git a/aws.go b/aws.go
index 6b707fe..40c452d 100644
--- a/aws.go
+++ b/aws.go
@@ -379,6 +379,23 @@ func (a *AwsConn) ListObjectPrefixes(bucket string) ([]string, error) {
 	return prefixes, err
 }
 
+// Deletes a list of objects
+func (a *AwsConn) DeleteObjects(bucket string, keys []string) error {
+	objs := []*s3.ObjectIdentifier{}
+	for _, v := range keys {
+		o := s3.ObjectIdentifier{Key: aws.String(v)}
+		objs = append(objs, &o)
+	}
+	_, err := a.s3svc.DeleteObjects(&s3.DeleteObjectsInput{
+		Bucket: aws.String(bucket),
+		Delete: &s3.Delete{
+			Objects: objs,
+			Quiet: aws.Bool(true),
+		},
+	})
+	return err
+}
+
 // CreateBucket creates a new S3 bucket
 func (a *AwsConn) CreateBucket(name string) error {
 	_, err := a.s3svc.CreateBucket(&s3.CreateBucketInput{
diff --git a/cmd/rmbook/main.go b/cmd/rmbook/main.go
new file mode 100644
index 0000000..8d434a9
--- /dev/null
+++ b/cmd/rmbook/main.go
@@ -0,0 +1,78 @@
+// Copyright 2020 Nick White.
+// Use of this source code is governed by the GPLv3
+// license that can be found in the LICENSE file.
+
+// rmbook removes a book from cloud storage.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+
+	"rescribe.xyz/bookpipeline"
+)
+
+const usage = `Usage: rmbook bookname
+
+Removes a book from cloud storage.
+`
+
+// null writer to enable non-verbose logging to be discarded
+type NullWriter bool
+
+func (w NullWriter) Write(p []byte) (n int, err error) {
+	return len(p), nil
+}
+
+type RmPipeliner interface {
+        MinimalInit() error
+        WIPStorageId() string
+	DeleteObjects(bucket string, keys []string) error
+	ListObjects(bucket string, prefix string) ([]string, error)
+}
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprintf(flag.CommandLine.Output(), usage)
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	if flag.NArg() < 1 {
+		flag.Usage()
+		return
+	}
+
+	var n NullWriter
+	verboselog := log.New(n, "", log.LstdFlags)
+
+	var conn RmPipeliner
+	conn = &bookpipeline.AwsConn{Region: "eu-west-2", Logger: verboselog}
+
+	fmt.Println("Setting up cloud connection")
+	err := conn.MinimalInit()
+	if err != nil {
+		log.Fatalln("Error setting up cloud connection:", err)
+	}
+
+	bookname := flag.Arg(0)
+
+	fmt.Println("Getting list of files for book")
+	objs, err := conn.ListObjects(conn.WIPStorageId(), bookname)
+	if err != nil {
+		log.Fatalln("Error in listing book items:", err)
+	}
+
+	if len(objs) == 0 {
+		log.Fatalln("No files found for book:", bookname)
+	}
+
+	fmt.Println("Deleting all files for book")
+	err = conn.DeleteObjects(conn.WIPStorageId(), objs)
+	if err != nil {
+		log.Fatalln("Error deleting book files:", err)
+	}
+
+	fmt.Println("Finished deleting files")
+}