Add rmbook tool

1 files changed, 78 insertions, 0 deletions

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")
+}