Bumped terraform versions preclude opentofu?

[lyricnz]

Affected components

• Fabric modules
• FAST
• Blueprints
• Other

The problem

PR #2768 changes the terraform requirement from terraform_version: 1.7.4 to terraform_version: 1.10.2. What was the reason for this? It precludes using opentofu which has otherwise been perfectly acceptable

Release version

HEAD

Terraform version

OpenTofu v1.8.7

Steps to reproduce

Upgrade to head, attempt to terraform/tofu init

Expected behavior

Should work ;)

Actual behavior

Error: Unsupported OpenTofu Core version
│
│ on ../../../modules/pubsub/versions.tf line 18, in terraform:
│ 18: required_version = ">= 1.10.2"

Additional context

No response

[ludoo]

Reason is to use the new templatestring function. TBH OpenTofu should leverage a different version from Terraform, but while they share the same configuration I guess the only way is for you to replace version files.

We use a one-liner to do it when updating, you might want to do the same:

• edit default-versions.tf
• find . -name versions.tf -exec cp default-versions.tf {} \;

I am closing this as our main target is Terraform, and tofu works (we test changes against both). This is just a problem in the way tofu leverages the same version configuration as Terraform (which again it shouldn't).

[ludoo]

Reopening as I just opened a feature request for OpenTofu (linked above).

[juliocc]

As per the issue opened by @ludoo:

Simply create your version constraints in Terraform in a file called providers.tf and the ones for OpenTofu in a file called providers.tofu. The contents of providers.tofu will override providers.tf in OpenTofu only.

[ludoo]

Yep, we will send a PR shortly to add tofu-specific versions. This also simplifies our testing.

[ludoo]

@lyricnz thanks a lot for raising this, as it allowed us to improve the way we support and test tofu. :)

[lyricnz]

Thank you very much!