Composer - A Terminus plugin for running Composer commands on a Pantheon site

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1.1.0 2019-02-22 16:36 UTC


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Terminus Plugin to run Composer commands on Pantheon sites.

Adds a command 'composer' to Terminus 1.x, 2.x or 3.x which you can use just like 'drush' or 'wp'.

This project is a simplified version of the original Terminus Composer Plugin by Brian Thompson.


This plugin should only be used with sites that are managed by Composer. The recommended upstreams are:

This plugin may also be used with "Build Tools" and "No CI Workflow" sites that were started with one of the following template projects:

Using Composer to manage standard sites on Pantheon not started with these upstreams (or a similar variant thereof) is not recommended. Using with Drupal 8.8 on the drops-8 will produce a working site, but will make future dashboard updates difficult. Using with sites based on the Standard non-Composer Pantheon WordPress upstream, or Drupal versions prior to 8.8 is likely to break the site.


  • terminus composer my-script
  • terminus composer -- config repositories.drupal composer
  • terminus composer -- require drupal/media
  • terminus composer -- update


Installing via Terminus 3

terminus self:plugin:install pantheon-systems/terminus-composer-plugin

On older versions of Terminus:

mkdir -p ~/.terminus/plugins
composer create-project --no-dev -d ~/.terminus/plugins pantheon-systems/terminus-composer-plugin:~1


Run terminus help composer for help.