review_apps_on_pr_close.yml

name: "Review apps: on PR close"
on:
  pull_request:
    # only run when a PR is closed or merged
    types: [closed]
env:
  IMAGE_TAG: "842676007477.dkr.ecr.eu-west-2.amazonaws.com/forms-admin:pr-${{github.event.pull_request.number}}-${{github.event.pull_request.head.ref}}"
jobs:
  delete-review-app:
    # this references a codebuild project configured in forms-deploy
    # see: https://docs.aws.amazon.com/codebuild/latest/userguide/action-runner.html
    runs-on: codebuild-review-forms-admin-gha-runner-${{github.run_id}}-${{github.run_attempt}}

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Determine Terraform version
        id: terraform-version
        run: |
          cat .review_apps/.terraform-version | xargs printf "TF_VERSION=%s" >> "$GITHUB_OUTPUT"

      - uses: hashicorp/setup-terraform@v3
        with:
          terraform_version: ${{steps.terraform-version.outputs.TF_VERSION}}

      - name: Delete review app
        run: |
          cd .review_apps/

          terraform init -backend-config="key=review-apps/forms-admin/pr-${{github.event.pull_request.number}}.tfstate"
          terraform destroy \
            -var "pull_request_number=${{github.event.pull_request.number}}" \
            -var "forms_admin_container_image=${{env.IMAGE_TAG}}" \
            -no-color \
            -auto-approve