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

core/data/data.go

@@ -8,15 +8,16 @@ import (
 	"database/sql"
 	"fmt"
 	"os"
+	"path/filepath"
 	"time"
 
+	"github.com/owncast/owncast/config"
 	"github.com/owncast/owncast/utils"
 	log "github.com/sirupsen/logrus"
 )
 
 const (
 	schemaVersion = 0
-	backupFile    = "backup/owncastdb.bak"
 )
 
 var _db *sql.DB
@@ -95,6 +96,7 @@ func SetupPersistence(file string) error {
 
 	dbBackupTicker := time.NewTicker(1 * time.Hour)
 	go func() {
+		backupFile := filepath.Join(config.BackupDirectory, "owncastdb.bak")
 		for range dbBackupTicker.C {
 			utils.Backup(_db, backupFile)
 		}
@@ -105,7 +107,8 @@ func SetupPersistence(file string) error {
 
 func migrateDatabase(db *sql.DB, from, to int) error {
 	log.Printf("Migrating database from version %d to %d\n", from, to)
-	utils.Backup(db, fmt.Sprintf("backup/owncast-v%d.bak", from))
+	dbBackupFile := filepath.Join(config.BackupDirectory, fmt.Sprintf("owncast-v%d.bak", from))
+	utils.Backup(db, dbBackupFile)
 	for v := from; v < to; v++ {
 		switch v {
 		case 0: