Information for: DEVELOPERS   PARTNERS

Contributing to Acquia BLT

Before you create an issue or pull request, Acquia recommends reading and taking the time to understand the following guide. Submitted issues not based on these guidelines may be closed.

Acquia BLT feature requests, bugs, support requests, and milestones are tracked with the BLT GitHub issue queue.

Note the branch statuses documented on the GitHub page:

  • Pull requests for enhancements will be accepted only for the active development branch (11.x and 10.x).
  • Pull requests for bug fixes will be accepted only for supported branches (11.x, 10.x, and 9.2.x).

General guidelines

Note the following guidelines when submitting issues or pull requests:

  • Issues filed directly with the Acquia BLT project aren’t subject to a service-level agreement (SLA).
  • Acquia BLT is distributed under the GPLv2 license; all documentation, code, and guidance is provided without warranty.
  • The project maintainers are under no obligation to respond to support requests, feature requests, or pull requests.
  • If more information is requested and no reply is received within a week, issues may be closed.

Newly filed issues will be reviewed by an Acquia BLT maintainer and added to the backlog milestone if accepted.

BLT doesn’t publish timelines or road maps to reflect when individual issues will be addressed. If you would like to request prioritization of a specific ticket, complete the following tasks:

  • Submit product feedback through your Technical Account Manager or submit a support ticket on your Cloud subscription.
  • Vote for the relevant issue by adding a +1 reaction.
  • Submit a pull request, which will receive priority review.

Submitting issues

Before submitting an issue, be sure to search for existing issues (including closed issues) matching your issue. Duplicate issues will be closed.

Use caution when selecting your issue type, and if you aren’t sure of the issue type, consider submitting a support request.

  • Feature request: A request for a specific enhancement for Acquia BLT. A feature request is distinct from a bug report because it indicates a missing feature for Acquia BLT instead of a literal error with Acquia BLT. Feature requests are distinct from support requests because they’re specific and atomic requests for new Acquia BLT features, instead of a general request for help or guidance.

  • Bug report: A defined instance of Acquia BLT not behaving as expected. A bug report is distinct from a feature request because it represents a mismatch between what Acquia BLT does and what Acquia BLT claims to do. A bug report is distinct from a support request by including specific steps to reproduce the problem (ideally starting from a fresh installation of Acquia BLT) and justifying why the instance is a problem with Acquia BLT rather than with an underlying tool, such as Composer or Drush.

  • Support request: A request for help or guidance. Use the issue type if you aren’t sure how to do something or can’t find a solution to a problem that may or may not be a bug. Before filing a support request, review BLT support for solutions to common problems and general troubleshooting techniques.

    If you have an Acquia subscription, consider filing a support ticket instead of an Acquia BLT issue to receive support subject to your SLA.

After selecting your issue type, be sure to complete the entire issue template.

Submitting pull requests

Note the branch statuses documented on the GitHub page:

  • Pull requests for enhancements will only be accepted for the active development branch (11.x or 10.x).
  • Pull requests for bug fixes will only be accepted for supported branches (11.x, 10.x, or 9.2.x).
  • When submitting a pull request for a bug fix or enhancement applying to several branches, submit only a single pull request to the latest development branch for review. A maintainer will backport the fix if appropriate.

Pull requests must also adhere to the following guidelines:

  • Pull requests must be atomic and targeted at a single issue rather than broad scope.
  • Pull requests must contain clear testing steps and justification, and all other information required by the pull request template.
  • Pull requests must pass automated tests before they will be reviewed. Acquia recommends running the tests locally before submitting.
  • Pull requests must meet Drupal coding standards and best practices as defined by the project maintainers.

Developing Acquia BLT locally

If you want to contribute to developing Acquia BLT, Acquia recommends cloning Acquia BLT and linking it to a BLT-based project (referred to here as blted) through Composer’s path repository feature. BLT provides a command blt:dev:link-composer that does this for you and configures Vagrant to use your development version of BLT.

Due to Vagrant restrictions for handling symlinks, Vagrant supports two types of directory structures:

The first is to place BLT directly next to the project you are testing. For instance:

  • BLT is located at ~/blt

  • Your BLT test project is located at ~/blted

  • From your project (~/blted), run the following command:

    blt blt:dev:link-composer --blt-path=../blt

The second supported structure is to have BLT as a sibling once removed from your test project, for example:

  • BLT is located at ~/packages/blt

  • Your BLT test project is located at ~/sites/blted

  • From your project (~/blted), run the following command with no arguments (this is the default structure):

    blt blt:dev:link-composer

Your blted project will now have a Composer dependency on your local clone of Acquia BLT through a symlink. You can make changes to files in blt and see them instantly reflected in blted/vendor/acquia/blt.


To complete the same release testing performed during continuous integration (CI) execution, run the following command:

./vendor/bin/robo release:test

Acquia BLT version 10.x requires the following to run the same release testing performed during CI execution:

  • Four local MySQL databases available, with drupal, drupal2, drupal3, and drupal4 as the db names.

  • A MySQL user with access to the four local MySQL databases with drupal as the username and password which may be sensitive to the MySQL version. In newer versions of MySQL (8+), you may want to set the user password as follows:

    alter user 'drupal'@'localhost' identified with mysql_native_password by 'drupal';
  • Enabling the PHP MySQL extension.

  • Chromedriver, sqlite, and the php-sqlite3 extension to run @group drupal tests.

  • (Optional) Exclude @group requires-vm.