terragrunt catalog support for module monorepo

[tinder-tder]

Describe the solution you'd like Support module monorepos when using catalog command (example: https://github.com/gruntwork-io/terragrunt-infrastructure-modules-example/tree/master)

Currently only polyrepos are supported or if the repo root has a modules subdir in it.

running a catalog command against a mono repo without a path will fail because it it has no .tf files in the root

% tg catalog https://github.com/gruntwork-io/terragrunt-infrastructure-modules-example/                      
DEBU[0000] Terragrunt Version: 0.54.1                   
INFO[0000] Cloning repository "https://github.com/gruntwork-io/terragrunt-infrastructure-modules-example/" to temprory directory "/var/folders/74/0smsj_5x54d36ybdpbf_xm0w0000gn/T/catalog-2858041464" 
DEBU[0001] Parsing git config "/var/folders/74/0smsj_5x54d36ybdpbf_xm0w0000gn/T/catalog-2858041464/.git/config" 
DEBU[0001] Remote url: "https://github.com/gruntwork-io/terragrunt-infrastructure-modules-example.git" for repo: "/var/folders/74/0smsj_5x54d36ybdpbf_xm0w0000gn/T/catalog-2858041464" 
ERRO[0001] specified repository "https://github.com/gruntwork-io/terragrunt-infrastructure-modules-example/" does not contain modules 
ERRO[0001] Unable to determine underlying exit code, so Terragrunt will exit with error code 1 

adding a full path to a module subdir will fail because its not a "git repo"

% tg catalog https://github.com/gruntwork-io/terragrunt-infrastructure-modules-example/mysql
DEBU[0000] Terragrunt Version: 0.54.1                   
INFO[0000] Cloning repository "https://github.com/gruntwork-io/terragrunt-infrastructure-modules-example/mysql" to temprory directory "/var/folders/74/0smsj_5x54d36ybdpbf_xm0w0000gn/T/catalog-571873603" 
ERRO[0001] the specified path "/var/folders/74/0smsj_5x54d36ybdpbf_xm0w0000gn/T/catalog-571873603" is not a git repository 
ERRO[0001] Unable to determine underlying exit code, so Terragrunt will exit with error code 1 

There should be a way to specify a repo root and automatically parse all subdirectories in the same way a modules dir would be processed.

Describe alternatives you've considered reorganizing our current IAC module repo is doable but would involve updating all references elsewhere to match the new module path

[Dudesons]

I just discover this command and want to try it in my mono repo but I discover this issue. I would like to add another thing in this kind of setup, it would be nice if we can specify a path to our modules without the need to have a git repository because in some cases the git repo contain more than iac code or we are mounting the code in a container with a docker compose/dagger/...

Is it something possible in the future or the git repository is mandatory ?

[liukch]

Yes, why there must be a modules subfolder in git repo?

[arichtman-srt]

Similar issue - relative paths within the same repo fail saying "not a git repository". We would like to keep our modules in the same repository, just under terraform/modules, not the root + modules

[github-actions[bot]]

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