To execute extended build:generate scenario run next command from your Magento Cloud project:
php ./vendor/bin/ece-tools run scenario/build/generate.xml ./vendor/exequiellares/adobe-cloud-ece-tools-extend/scenario/build/extend-build-generate.xml
To execute extended deploy scenario run next command from your Magento Cloud project:
php ./vendor/bin/ece-tools run scenario/deploy.xml ./vendor/exequiellares/adobe-cloud-ece-tools-extend/scenario/extend-deploy.xml
You can extend base scenario with different custom scenarios.
php vendor/bin/ece-tools run "path/to/base/scenarion" "path/to/extended/scenarion" "path/to/extended/scenarion2" "path/to/extended/scenarion3"
Keep in mind that scenarios will be merged in provided order.
Into Magento Cloud project configuration variables add
CONFIG_INDEXER_USE_APPLICATION_LOCK = 1 // TRUE
If not set default value is FALSE