Can we allow members to add their own Terraform providers?

[dms1981]

User Story

As a Modernisation Platform Customer
I need to add providers to my terraform { required_providers { ... } }
So that I can supply providers that my code requires

Value / Purpose

Modernisation Platform customers have an ongoing need to manage their own terraform code, including specifying their own providers and versions. At present the only location that they can specify the relevant providers is in the platform_versions.tf file which is created from a standard template.

There is a risk that this file can be overwritten by a script in the Modernisation Platform repository - replace-platform-files-with-templates.sh.

We should find a way to allow customers to specify their own providers as they require.

Useful Contacts

No response

Additional Information

No response

Definition of Done

• Assess possible options
  • Should we refactor platform_versions.tf to versions.tf and update our templates?
  • Should we just remove platform_versions.tf from the overwrite script?
  • Would we need to update the CODEOWNERS file to allow customer management without our oversight?
• Chosen option implemented

[dms1981]

I think it's worth pointing out here that customers can define providers separately in modules, so keeping this gated doesn't give us the control that we might think it does. Personally I think this should be open to customers to adjust as their infrastructure requires.

[dms1981]

@davidkelliott has previously solved the potential for platform_versions.tf to be overwritten in this PR. Once I've refactored the templates and the existing platform_versions.tf I'll remove this clause from the script.

[mikereiddigital]

I've reviewed this issue & moving to done.