terraform-prod.yml

name: "[PROD] - Terraform Deployment"

on:
  push:
    branches:
      - main

permissions:
  id-token: write
  contents: read

jobs:
  terraform:
    runs-on: ubuntu-latest

    defaults:
      run:
        shell: bash

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

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v3
        with:
          terraform_version: 1.8.3

      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v4
        with:
          role-to-assume: arn:aws:iam::179916804929:role/BuildRun-GithubActions-Role #change to reflect your IAM role’s ARN
          role-session-name: GitHub_to_AWS_via_FederatedOIDC
          aws-region: ${{ vars.AWS_REGION }}

      - name: Read destroy configuration
        id: read-destroy-config
        run: |
          DESTROY_DEV="$(jq -r '.dev' ./infra/destroy_config.json)"
          DESTROY_PROD="$(jq -r '.prod' ./infra/destroy_config.json)"
          echo "destroy_dev=$(echo $DESTROY_DEV)" >> $GITHUB_OUTPUT
          echo "destroy_prod=$(echo $DESTROY_PROD)" >> $GITHUB_OUTPUT

      - name: Terraform Init
        run: |
          cd infra && terraform init \
            -backend-config="bucket=${{ vars.TERRAFORM_S3_STATEFILE_BUCKET }}" \
            -backend-config="key=${{ github.event.repository.name }}" \
            -backend-config="region=${{ env.AWS_REGION }}" \
            -backend-config="dynamodb_table=${{ vars.TERRAFORM_DYNAMODB_LOCK_TABLE }}"

      - name: Terraform Validate
        run: terraform validate

      - name: Terraform Destroy for Prod
        if: steps.read-destroy-config.outputs.destroy_prod == 'true' && github.ref == 'refs/heads/main' && github.event_name == 'push'
        id: terraform-destroy-prod
        run: cd infra &&
          terraform workspace select prod || terraform workspace new prod &&
          terraform destroy -var-file="./envs/prod/terraform.tfvars" -auto-approve

      - name: Terraform Plan for Prod
        if: steps.read-destroy-config.outputs.destroy_prod != 'true' && github.ref == 'refs/heads/main' && github.event_name == 'push'
        id: terraform-plan-prod
        run: cd infra &&
          terraform workspace select prod || terraform workspace new prod &&
          terraform plan -var-file="./envs/prod/terraform.tfvars" -out=prod.plan

      - name: Terraform Apply for Prod
        if: steps.read-destroy-config.outputs.destroy_prod != 'true' && github.ref == 'refs/heads/main' && github.event_name == 'push'
        id: terraform-apply-prod
        run: cd infra &&
          terraform workspace select prod || terraform workspace new prod &&
          terraform apply "prod.plan"