ChristianLempa_Boilerplates/actions/gitlab/terraform/apply.yml

---
spec:
  inputs:
    as:
      default: apply-terraform
    stage:
      default: terraform

    root_dir:
      default: ${CI_PROJECT_DIR}/terraform
      description: 'Root directory for the OpenTofu project.'
    state_name:
      default: default
      description: 'Remote OpenTofu state name.'

---
variables:
  TF_ROOT: "$[[ inputs.root_dir ]]"
  TF_ADDRESS: ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/terraform/state/$[[ inputs.state_name ]]
  TF_USERNAME: gitlab-ci-token
  TF_PASSWORD: ${CI_JOB_TOKEN}

'$[[ inputs.as ]]':
  stage: '$[[ inputs.stage ]]'
  image:
    name: ghcr.io/opentofu/opentofu:latest
    entrypoint: [""]
  before_script: |
    echo "Before → Executing..."
    echo "Before → Enter TF root directory"
    cd ${TF_ROOT}
  script: |
    echo "Script → Executing..."
    echo "Script → Initialize Terraform backend"
    tofu init \
     -backend-config=address=${TF_ADDRESS} \
     -backend-config=lock_address=${TF_ADDRESS}/lock \
     -backend-config=unlock_address=${TF_ADDRESS}/lock \
     -backend-config=username=${TF_USERNAME} \
     -backend-config=password=${TF_PASSWORD} \
     -backend-config=lock_method=POST \
     -backend-config=unlock_method=DELETE \
     -backend-config=retry_wait_min=5
    echo "Script → Validate Terraform"
    tofu validate
    echo "Script → Plan Terraform"
    tofu plan -lock=false -out=tfplan
    echo "Script → Apply Terraform"
    tofu apply -lock=false -auto-approve tfplan
  rules:
    - if: $CI_COMMIT_BRANCH == "main"
      changes:
        - '$[[ inputs.root_dir ]]/**'