silverstripe / deploynaut

		$environment = $dataTransfer->Environment();

		$backupDataTransfer = null;

		if(

			!empty($this->args['backupBeforePush'])

			&& $this->args['backupBeforePush'] !== 'false'

			&& $dataTransfer->Direction == 'push'

		) {

			$backupDataTransfer = DNDataTransfer::create();

			$backupDataTransfer->EnvironmentID = $environment->ID;

			$backupDataTransfer->Direction = 'get';

			$backupDataTransfer->Mode = $dataTransfer->Mode;

			$backupDataTransfer->ResqueToken = $dataTransfer->ResqueToken;

			$backupDataTransfer->AuthorID = $dataTransfer->AuthorID;

			$backupDataTransfer->write();

			$dataTransfer->BackupDataTransferID = $backupDataTransfer->ID;

			$dataTransfer->write();

		}

		try {

			// Disallow concurrent jobs (don't rely on queuing implementation to restrict this)

		// deploy onto a clean environment will not be performing any backup regardless of

		// whether the predeploy_backup option was passed or not.

		// Sometimes predeploy_backup comes through as string false from the frontend.

		if(

			!empty($this->args['predeploy_backup'])

			&& $this->args['predeploy_backup'] !== 'false'

			&& !empty($currentBuild)

		) {

			$backupDataTransfer = DNDataTransfer::create();

			$backupDataTransfer->EnvironmentID = $environment->ID;

			$backupDataTransfer->Direction = 'get';

			$backupDataTransfer->Mode = $backupMode;

			$backupDataTransfer->ResqueToken = $deployment->ResqueToken;

			$backupDataTransfer->AuthorID = $deployment->DeployerID;

			$backupDataTransfer->write();

			$deployment->BackupDataTransferID = $backupDataTransfer->ID;

			$deployment->write();

		}

		try {

			// Disallow concurrent deployments (don't rely on queuing implementation to restrict this)