terragrunt catalog - hosting: "self-hosted.gitlab.com" is not supported yet

[j2udev]

Describe the bug

I'll open by saying this may not be a bug as the error message clearly states it's not supported yet... but opening on the off chance it's just being overlooked. When trying to plug our private, self-hosted gitlab registry into the catalog command (and likely the scaffold command, but I haven't tested). I get an error like this:

terragrunt catalog --root-file-name=root.hcl
15:35:32.429 INFO   Terragrunt Cache server is listening on 127.0.0.1:58105
15:35:32.430 INFO   Start Terragrunt Cache server
15:35:32.435 INFO   Cloning repository "git::https://my-self-hosted.gitlab.com/my-group/terraform/meta?ref=main" to temporary directory "/tmp/catalog4d474a6d6732674d7a5a4e565f7658416230364d36756f44367a45/meta"
15:36:05.673 INFO   Shutting down Terragrunt Cache server...
15:36:05.673 INFO   Terragrunt Cache server stopped
15:36:05.674 ERROR  hosting: "my-self-hosted.gitlab.com" is not supported yet
15:36:05.674 ERROR  Unable to determine underlying exit code, so Terragrunt will exit with error code 1

Our private repo, meta, is a meta repo of terraform modules that exist under a modules directory as git submodules. I'm not sure that's affecting anything, but it's worth calling out.

Steps To Reproduce

It's a little hard to reproduce I'd say... you'd need to self host a private gitlab registry and if the error couldn't be recreated that way... you'd maybe need to also create a meta repo of your terraform modules.

Expected behavior

I expect that I can use terragrunt catalog/scaffold using our private, self-hosted gitlab instance.

Versions

• Terragrunt version: 0.72.3
• OpenTofu/Terraform version: tofu: 1.7.0
• Environment details (Ubuntu 20.04, Windows 10, etc.): Ubuntu Noble in a devcontainer running on an arm64 M1 Mac

[yhakbar]

I would classify this as an enhancement, rather than a bug.

I've marked it as preserved and requesting community contributions, as it's not complicated, but not a high priority to tackle right now.

You can see an example of how we handled this for Enterprise GitHub here:
https://github.com/gruntwork-io/terragrunt/blob/main/cli/commands/catalog/module/repo.go#L140-L155

I don't have a self hosted server of GitLab to test this against, so I would ask for good faith confirmation from anyone that does pick this up that they'll do adequate testing, and document in the codebase that this is maintained on a best effort basis by the community.