Issue with Detecting Modified .hcl Files in Pre-Workflow Hook

[nattvasan]

Description:

I'm encountering an issue when trying to detect modified .hcl files using a pre-workflow hook in Atlantis, particularly when leveraging the terragrunt-atlantis-config tool.

Problem:

I have a scenario where I need to list only the .hcl files that were modified in the most recent commit to ensure that Atlantis plans and applies the correct infrastructure changes. However, when I use the git show --name-only --pretty="" $HEAD_COMMIT | grep '\.hcl$' command in the pre-workflow hook, it lists all .hcl files in the commit, not just those that were modified.

terragrunt-atlantis-config generate --ignore-dependency-blocks --ignore-parent-terragrunt true --filter terragrunt/ --workflow terragrunt --output atlantis.yaml

Eventhough, there is modification to *.hcl file, terragrunt plan is not executing as per repos.yaml

atlantis.yaml generated:

• autoplan:
  enabled: true
  when_modified:

  • '*.hcl'
  • '.tf'
  • ../../../../provider_config.hcl
  • ../../../../../terraform/modules/argocd-module/.tf
  • ../../../../../terraform/sub-modules/argocd/.tf
    dir: regions/westeurope/demo/argocd
    workflow: terragrunt

  My directory structure:

  infra/terragrunt/regions/westeurope/demo/argocd/terragrunt.hcl

  terraform {
  source = "${get_repo_root()}/terraform//modules/argocd-module/"
  }

infra/terraform/modules/argocd-module/main.tf

module "argocd" {
source = "../../sub-modules/argocd"
}

Expected Behavior:

• If I change any *.tf files, I want atlantis to plan only *.hcl files but not *.tf

Error:
msg=open /atlantis-data/repos/devops1/infra/353/default/terraform/sub-modules/argocd/terragrunt.hcl: no such file or directory

but actually, the *.hcl is not under sub-modules/argocd/

• The hook should only list .hcl files that were modified in the latest commit.

Actual Behavior:

All .hcl files in the commit are listed, regardless of whether they were modified.

Environment:

Atlantis App version: v0.28.3
Atlantis Helm chart version: atlantis-5.3.0
terragrunt-atlantis-config version: 1.18.0
Terraform version: v1.5.7
Terragrunt version: v0.57.1