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// 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 [-dryrun] 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() {
dryrun := flag.Bool("dryrun", false, "print which files would be deleted but don't delete")
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)
}
if *dryrun {
fmt.Printf("I would delete these files:\n")
for _, v := range objs {
fmt.Println(v)
}
return
}
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")
}
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