Feature Request: extending trellis check command

Terms

• I have read the guidelines for Contributing to Roots Projects
• This request is not a duplicate of an existing issue
• This is not a personal support request that should be posted on the Roots Discourse community

Summary

Extend the dependency checks the trellis check command carries out to include required provisioning/deployment checks like SSH agent, keys, Ansible.

Motivation

Why are we doing this?

Right now, trellis check looks for Python, Vagrant and Virtualbox compatibility related to local development, but some important checks would be:

• system Ansible version and its compatibility
• SSH agent being enabled
• SSH agent keys being loaded

What use cases does it support?

Would be nice to support checks of any known dependencies of the deploy/provision processes.

What is the expected outcome?

An output like:

Checking Trellis requirements...

Required:
[✓] Ansible [>= 2.9.7]: 2.10.0
[✓] Python [>= 3.8.0]: 3.11.2
[✓] SSH Agent [On]: Yes
[✓] SSH Agent [Loaded]: Yes

Optional:

[✓] Vagrant [>= 2.1.0]: 2.3.4
[✓] VirtualBox [>= 4.3.10]: 6.1.36r152435
...

Potential conflicts / foreseeable issues

May conflict with Ansible version in virtual environment

Additional Context

No response

Start at the trellis check command and its existing Python, Vagrant, and VirtualBox checks. Review how dependency checks are represented before scoping Ansible compatibility and SSH-agent and key checks, including the possible conflict with a virtual environment. Done means the command reports the required and optional checks in the proposed format.