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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.
// getbests downloads every 'best' file from a set of OCRed books
// stored on cloud infrastructure
package main
import (
"flag"
"fmt"
"log"
"strings"
"rescribe.xyz/bookpipeline"
)
const usage = `Usage: getbests
Downloads every 'best' file from a set of OCRed books. This is
useful for statistics.
`
// 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 Pipeliner interface {
Init() error
ListObjects(bucket string, prefix string) ([]string, error)
Download(bucket string, key string, fn string) error
WIPStorageId() string
}
func main() {
flag.Usage = func() {
fmt.Fprintf(flag.CommandLine.Output(), usage)
flag.PrintDefaults()
}
flag.Parse()
var n NullWriter
verboselog := log.New(n, "", log.LstdFlags)
var conn Pipeliner
conn = &bookpipeline.AwsConn{Region: "eu-west-2", Logger: verboselog}
err := conn.Init()
if err != nil {
log.Fatalln("Error setting up cloud connection:", err)
}
log.Println("Getting list of all available objects to filter through")
objs, err := conn.ListObjects(conn.WIPStorageId(), "")
if err != nil {
log.Fatalln("Failed to get list of files", err)
}
log.Println("Downloading all best files found")
for _, i := range objs {
parts := strings.Split(i, "/")
if parts[len(parts)-1] == "best" {
err = conn.Download(conn.WIPStorageId(), i, parts[0]+"-best")
if err != nil {
log.Fatalln("Failed to download file", i, err)
}
}
}
}
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