Populate drush URI using environment variable

[paul121]

What in this template can be improved or added as a feature?

The current platformsh_generate_drush_yml.php script populates the drush options.uri to the default route defined for the platformsh project. While the script is fairly simple, requiring that it be run as a deploy hook does add a certain level of complexity to the template, especially when initially trying to understand how the template works.

Thankfully drush has an easier way to set the options.uri config value - using the DRUSH_OPTIONS_URI environment variable! This can be set in the .environment file at the root of this repository. Relevant docs: https://www.drush.org/latest/using-drush-configuration/#environment-variables

An added benefit of this approach is that it becomes much easier to use this template with your own .drush/drush.yml config file. As it stands you would need to update platformsh_generate_drush_yml.php to include additional values or run a subsequent command that amends the existing .drush/drush.yml. It would be much easier if this template didn't create the .drush/drush.yml in the first place.

What exactly should be updated?

Populate DRUSH_OPTIONS_URI in .environment, something like:

# Set the default site URL for drush.
export DRUSH_OPTIONS_URI=$(echo $PLATFORM_ROUTES | base64 --decode | jq -r 'map(select(.primary == true)) | first | .production_url')

Remove platformsh_generate_drush_yml.php

How important is this feature to you?

This does not block my work. I will likely implement this myself for reasons described above and it seemed like it may be worth contributing back to the template.

Additional context

https://www.drush.org/latest/using-drush-configuration/#drush-configuration