Installing Drush for Drupal 7

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The Probo Drupal plugin requires Drush to install your Drupal site. For Drupal 8 and higher, Drush is installed as a Composer dependency as described in our Using Drush documentation. Drupal 7 applications, however, are typically not managed with Composer, so a different approach is needed.

The last version of Drush to support Drupal 7 is Drush 8. It is distributed as a single self-contained drush.phar file. The process is to download a copy of Drush into your repository and symlink it into the system path during your build so that the drush command runs on the command line without specifying a path.

Drush 8 has several unremediated security issues. These should not negatively impact your Drupal application on Probo but we cannot guarantee it. For more information on Drush 8, see the Drush 8 documentation.

Downloading Drush 8

Download the latest Drush 8 release from the Drush releases page into the root of your Drupal 7 repository and make it executable:

1 2	wget https://github.com/drush-ops/drush/releases/download/8.5.0/drush.phar chmod +x drush.phar

Commit the file to your repository so that Drush is included as part of your application:

1 2	git add drush.phar git commit -m "Add Drush 8 to the repository."

Symlinking Drush in Your Probo Builds

With drush.phar committed to your repository, add a build step to your .probo.yaml file that symlinks it to /usr/local/bin/drush. This makes the drush command available without a path to any subsequent build steps, including the Drupal plugin. This step must come before your Drupal plugin step.

assets:
  - dev.sql.gz
steps:
  - name: Install Drush 8
    plugin: Script
    script: |
      ln -s $SRC_DIR/drush.phar /usr/local/bin/drush

  - name: Provision Drupal 7 Site
    plugin: Drupal
    drupalVersion: 7
    database: dev.sql.gz
    databaseGzipped: true
    clearCaches: true

If you prefer not to commit drush.phar to your repository, you can download it during the build instead. Replace the symlink line in the script above with:

1 2	wget -q -O /usr/local/bin/drush https://github.com/drush-ops/drush/releases/download/8.5.0/drush.phar chmod +x /usr/local/bin/drush

Keep in mind this downloads Drush on every build, so committing it to your repository makes your builds faster and more reliable.

Be sure to set drupalVersion: 7 in your Drupal plugin step so that the correct Drush commands are run for your version of Drupal, such as drush cc all for clearing caches.