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10.0.0-beta3 2019-03-15 23:38 UTC


BLT logo of stylized sandwich

Build Status Documentation Status Packagist Stories in Ready

BLT (Build and Launch Tool) provides an automation layer for testing, building, and launching Drupal 8 applications.

You can find all BLT documentation on Read the Docs:

Getting started

See for a list of prequisites and links to instructions for creating new projects, adding BLT to existing projects, and updating BLT.


Releases and versioning

BLT generally has an LTS release, supported stable release, and unstable (HEAD) release at any given time, each corresponding to a major semantic version. The newest supported major version will receive both bug fixes and new features, while the penultimate ("LTS") major version will receive bug fixes for at least two months (or longer if necessary in order to match pinned versions of Drupal or Drush).

Release support status

Major Version Support Status Drupal Drush Dev Status
10.x Unsupported (Beta) >=8.6 >=9.5.0 *active dev
9.2.x Supported 8.6 >=9.4.0 *active dev
9.x LTS, EOL May 2019 8.5 >=9.1.0 *bug fixes
<=8.9.x Unsupported, EOL <=8.5 ~8

Branch details

The 10.x branch is considered a major release because it requires PHP 7+ and removes the Composer merge plugin that BLT previously used to manage dependencies.

The 9.x branch will be supported until Drupal 8.5.x is EOL (May 2019).

Philosophy and Purpose

BLT is designed to improve efficiency and collaboration across Drupal projects by providing a common set of tools and standardized structure. It was born out of the need to reduce re-work, project set up time, and developer onboarding time.

Its explicit goals are to:

  • Provide a standard project template for Drupal based projects
  • Provide tools that automate the setup, testing, launching, and maintenance work for projects
  • Document and enforce Drupal standards and best practices via default configuration, automated testing, and continuous integration

Its scope is discretely defined. It is not intended to provide:

  • Drupal application features (e.g., workflow, media, layout, pre-fabbed content types, etc.)
  • A local hosting environment
  • A replacement for good judgement (as with Drupal, it leaves you the freedom to make mistakes)


Support and contribution

BLT is provided as an open source tool in the hope that it will enable developers to easily generate new Drupal projects that conform to Acquia Professional Services' best practices.

Please feel free to contribute to the project or file issues via the GitHub issue queue. See for contribution guidelines and instructions.

We also provide a limited FAQ for common issues.


Copyright (C) 2016 Acquia, Inc.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.