Support for OpenTofu

[hauleth]

It would be handy to have description how to use it with OpenTofu. Right now with:

terraform = pkgs.opentofu.withPlugins (plugins: [
  plugins.ovh
  providers.Backblaze.b2
]);

I am getting:

╷
│ Error: Required plugins are not installed
│ 
│ The installed provider plugins are not consistent with the packages selected in the dependency lock file:
│   - registry.terraform.io/backblaze/b2: there is no package for registry.terraform.io/backblaze/b2 0.8.1 cached in .terraform/providers
│   - registry.terraform.io/ovh/ovh: there is no package for registry.terraform.io/ovh/ovh 0.26.0 cached in .terraform/providers
│ 
│ OpenTofu uses external plugins to integrate with a variety of different infrastructure services. To download the plugins required for this configuration, run:
│   tofu init
╵

When I try to run it.

[hauleth]

Ok, found workaround (for now) - you can use full name registry.terraform.io/ovh/ovh instead of just ovh/ovh in your provider spec and it will work right now.

[zimbatm]

This is probably a change that OpenTofu had to implement due to HashiCorp's licencing of registry.terraform.io. Legally you're not allowed to use their API unless sanctioned by HashiCorp.

[manveru]

Since I just hit the same issue, I worked around that by directly fetching the provider info from https://github.com/opentofu/registry-stable
Here's my implementation, could be a bit nicer if there was an option of passing the src directly to the original mkTerraformProvider, but it works well enough.
https://gist.github.com/manveru/bcd2b4e0d3a30abbdec19573083b34b7

[zimbatm]

I didn't notice before that https://github.com/opentofu/registry has a full list of providers. Using that as a database might make sense instead of building our own.

[kvendingoldo]

At this moment if you need to have a support of Terraform as well as OpenTofu (and Terragrunt :) ) in one tool you can use https://github.com/tofuutils/tenv which my team wrote some months ago. A lot of users switched to that tool to unify version management in the world of Terraform.

You're welcome to open any issues or contribute to tenv.