Merge from dev, add function to delete old file from backup dir

README.md

@@ -23,7 +23,7 @@ other way is download binary for your system, in the release page
 
 Copy binary for `/usr/local/bin/` then create cron
 
-`00 2 * * *   root  simple-backup --endpoint=localhost:9000 --ak=accesskey --sk=secretkey --secureendpoint=(true|false) --bucket=system-backup --bucketlocation=us-east-1 --backudir=/srv/backup/mysql`
+`00 2 * * *   root  simple-backup --endpoint=localhost:9000 --ak=accesskey --sk=secretkey --secureendpoint=(true|false) --bucket=system-backup --bucketlocation=us-east-1 --backudir=/srv/backup/mysql/ --daytodelete=7`
 
 You can run ``simple-backup -h`` to see help, simple-backup delete all backup from storage server older than 7 days
 

core/core.go

@@ -2,8 +2,11 @@ package core
 
 import (
 	"fmt"
+	"io/ioutil"
 	_ "log"
+	"os"
 	"path/filepath"
+	"time"
 )
 
 func FindFile(targetDir string, pattern []string) ([]string, error) {
@@ -18,3 +21,33 @@ func FindFile(targetDir string, pattern []string) ([]string, error) {
 
 	return matches, err
 }
+
+func RemoveOldFile(dir string, days float64) {
+	/*
+		Function to remove all file in dir older than *days
+	*/
+
+	//Read dir to search old files
+	files, _ := ioutil.ReadDir(dir)
+
+	for _, f := range files {
+		fi, err := os.Stat(dir + f.Name())
+		if err != nil {
+			fmt.Println(err)
+		}
+
+		// Calculate the difference between now and ModTime
+		now := time.Now()
+		currTime := fi.ModTime()
+		diff := now.Sub(currTime)
+
+		//if the file ModTime is larger than days*24 then delete file
+		if days*24 < diff.Hours() {
+			err := os.RemoveAll(dir + f.Name())
+			if err != nil {
+				fmt.Println(err)
+			}
+
+		}
+	}
+}

main.go

@@ -31,9 +31,19 @@ func main() {
 	bucket := flag.String("bucket", "alamesa-db", "Buket Name")
 	bucketLocation := flag.String("bucketlocation", "us-east-1", "Bucket Zone")
 	backupDir := flag.String("backupdir", "backup", "Backup directory location")
+	dayToDelete := flag.Float64("daytodelete", 7, "Days to delete old files from (backup dir)")
 	flag.Parse()
 	//
 
+	/*
+		I could create a subroutine to do this but then,
+		if there are many files to be deleted,
+		things that should be deleted would be uploaded to the backup,
+		so it is not put as a subroutine, it is expected that everything will be
+		erased and then the backup will be made
+	*/
+	core.RemoveOldFile(*backupDir, *dayToDelete)
+
 	// Create a new client for the storage server
 	s3Client, err := minio.New(*endPoint, *ak, *sk, *secureEndPoint)
 	if err != nil {
@@ -60,7 +70,7 @@ func main() {
 		// for all file in listFile we send to storage server
 		for _, file := range listFile {
 			fileName := filepath.Base(file)
-			//log.Printf(file_name)
+			// We save the file inside a folder with a name that is today's date
 			n, err := s3Client.FPutObject(*bucket, jodaTime.Format("YYYYMMdd", time.Now())+"/"+fileName, file, minio.PutObjectOptions{ContentType: ""})
 			if err != nil {
 				log.Fatalln(err)