updates to backups directory (#1099)

* read BackupDirectory from command line flag

* Change the default backup directory

* mkdir BackupDirectory

* use config for backup file path

* migrateDatabase to the backup directory

* use DoesFileExists

change permission on the directory to 0700

* declare err

* generate backupFile  where needed

* style fix

* more style fixes

* more style fixes

utils/backup.go

@@ -10,6 +10,7 @@ import (
 	"io"
 	"io/ioutil"
 	"os"
+	"path/filepath"
 
 	_ "github.com/mattn/go-sqlite3"
 	"github.com/schollz/sqlite3dump"
@@ -59,6 +60,15 @@ func Restore(backupFile string, databaseFile string) error {
 func Backup(db *sql.DB, backupFile string) {
 	log.Traceln("Backing up database to", backupFile)
 
+	BackupDirectory := filepath.Dir(backupFile)
+
+	if !DoesFileExists(BackupDirectory) {
+		err := os.MkdirAll(BackupDirectory, 0700)
+		if err != nil {
+			log.Fatalln(err)
+		}
+	}
+
 	// Dump the entire database as plain text sql
 	var b bytes.Buffer
 	out := bufio.NewWriter(&b)