Extending / Overriding BLT

To add or override a Phing target, you may create a custom build file. You must specify the location of your custom build file using the import key to your project.yml file, e.g.:

import: '${repo.root}/custom.xml'

Adding a custom target

  <project name="custom" default="build">
    <!-- Add custom targets. -->

Overriding an existing target

To override an existing target, just give it the same name as the default target provided by BLT. E.g.,

  <project name="custom" default="build">
    <target name="local:update" description="Update current database to reflect the state of the Drupal file system; uses local drush alias.">
      <phingcall target="setup:update">
        <property name="drush.alias" value="${drush.aliases.local}"/>

Overriding a variable value:

You can override the value of any Phing variable used by BLT by either:

  1. Adding the variable to your project.yml file:

    behat.tags: @mytags
  2. Specifying the variable value in your blt command using Phing argument syntax -D[key]=[value], e.g.,

    blt tests:behat -Dbehat.tags='@mytags'
  3. Using a custom build properties file rather than project.yml:

    blt tests:behat -propertyfile mycustomfile.yml -propertyfileoverride

Disabling a target

You may disable any BLT target. This will cause the target to be skipped during the normal build process. To disable a target, add a disable-targets key to your project.yml file:

      phpcs: true

This snippet would cause the validate:phpcs target to be skipped during BLT builds.

Modifying BLT Configuration

BLT configuration can be customized by overriding the value of default variable values. You can find the default value of any BLT variable in build.yml.

Listed below are some of the more commonly customized BLT targets.



To modify the behavior of the deploy:build target, you may override BLT's deploy configuration:

     build-dependencies: true
     dir: ${repo.root}/deploy
     exclude_file: ${blt.root}/phing/files/deploy-exclude.txt
     gitignore_file: ${blt.root}/phing/files/.gitignore

More specifically, you can modify the build artifact in the following key ways:

  1. Change which files are rsynced to the artifact by providing your own deploy.exclude_file value in project.yml. See upstream deploy-exclude.txt for example contents. E.g.,

        exclude_file: ${repo.root}/blt/deploy/rsync-exclude.txt
  2. Change which files are gitignored in the artifact by providing your own deploy.gitignore_file value in project.yml. See upstream .gitignore for example contents. E.g.,

        gitignore_file: ${repo.root}/blt/deploy/.gitignore
  3. Execute a custom command after the artifact by providing your own target-hooks.post-deploy-build.dir and target-hooks.post-deploy-build.command values in project.yml. E.g.,

      # Executed after deployment artifact is created.
        dir: ${deploy.dir}/docroot/profiles/contrib/lightning
        command: npm run install-libraries



You may disable a git hook by setting its value under git.hooks to false:

        pre-commit: false

You may use a custom git hook in place of BLT's default git hooks by setting its value under git.hooks to the directory path containing of the hook. The directory must contain an executable file named after the git hook:

        pre-commit: ${repo.root}/my-custom-git-hooks

In this example, an executable file named pre-commit should exist in ${repo.root}/my-custom-git-hooks.



To modify the behavior of the tests:behat target, you may override BLT's behat configuration:

      config: ${repo.root}/tests/behat/local.yml
      profile: local
      # If true, `drush runserver` will be used for executing tests.
      run-server: false
      # This is used for ad-hoc creation of a server via `drush runserver`.
      # If true, PhantomJS GhostDriver will be launched with Behat.
      launch-phantom: true
      # An array of paths with behat tests that should be executed.
        - ${docroot}/modules
        - ${docroot}/profiles
        - ${repo.root}/tests/behat
      tags: '~ajax'



To modify the behavior of the validate:phpcs target, you may override BLT's phpcs configuration:

        - files.php.custom.modules
        - files.php.tests
        - files.frontend.custom.themes

The phpcs.filesets array contains references to Phing <fileset>s. You can remove or add your own custom filesets to the phpcs.filesets array.

The default filesets are defined in filesets.xml.