Do not require customer to use standard output for backup script

Author: jianghao0718

share/github-backup-utils/ghe-backup-mysql

@@ -18,7 +18,7 @@ ghe_remote_version_required "$GHE_HOSTNAME"
 if is_service_external 'mysql'; then
   echo "Backing up external MySQL database using customer-provided script..."
   if [ -n "$EXTERNAL_DATABASE_BACKUP_SCRIPT" ]; then
-    $EXTERNAL_DATABASE_BACKUP_SCRIPT > "$GHE_SNAPSHOT_DIR/mysql.sql.gz"
+    $EXTERNAL_DATABASE_BACKUP_SCRIPT
   else
     echo "Error: EXTERNAL_DATABASE_BACKUP_SCRIPT is not configured. Please configure in backup.config."
     exit 1

share/github-backup-utils/ghe-restore-mysql

@@ -30,8 +30,12 @@ snapshot_dir="$GHE_DATA_DIR/$GHE_RESTORE_SNAPSHOT"
 
 # When customer uses external database, we rely on customer to implement the restore process
 if is_service_external 'mysql' "$snapshot_dir/settings.json"; then
-  echo "Restore external MySQL database using customer-provided script ..."
-  $EXTERNAL_DATABASE_RESTORE_SCRIPT
+  if [ -n "$EXTERNAL_DATABASE_RESTORE_SCRIPT" ]; then
+    $EXTERNAL_DATABASE_RESTORE_SCRIPT
+  else
+    echo "Error: EXTERNAL_DATABASE_RESTORE_SCRIPT is not configured. Please configure in backup.config."
+    exit 1
+  fi
 else
   ssh_config_file_opt=
   if is_binary_backup_feature_on; then