deploy-terraform.yml

name: "Deploy terraform"
on:
  push:
    paths:
      - 'terraform**'
    branches:
      - main
  pull_request:
permissions:
      id-token: write # This is required for aws oidc connection
      contents: read # This is required for actions/checkout
      pull-requests: write # This is required for gh bot to comment PR
env:
  TF_LOG: INFO
  AWS_REGION: ${{ secrets.AWS_REGION }}

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  deploy:
    runs-on: ubuntu-latest
    defaults:
      run:
        shell: bash
        working-directory: .
    steps:
      - name: Git checkout
        uses: actions/checkout@v3

      - name: Configure AWS credentials from AWS account
        uses: aws-actions/configure-aws-credentials@v1
        with:
          role-to-assume: ${{ secrets.AWS_ROLE }}
          aws-region: ${{ secrets.AWS_REGION }}
          role-session-name: GitHub-OIDC-TERRAFORM

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v2
        with:
          terraform_version: 1.2.5

      - name: Terraform fmt
        id: fmt
        working-directory: terraform
        run: terraform fmt -check
        continue-on-error: true

      - name: Terraform Init
        id: init
        working-directory: terraform
        env:
          AWS_BUCKET_NAME: ${{ secrets.AWS_BUCKET_NAME }}
          AWS_BUCKET_KEY_NAME: ${{ secrets.AWS_BUCKET_KEY_NAME }}
        run: terraform init -backend-config="bucket=${AWS_BUCKET_NAME}" -backend-config="key=${AWS_BUCKET_KEY_NAME}" -backend-config="region=${AWS_REGION}"

      - name: Terraform Validate
        id: validate
        working-directory: terraform
        run: terraform validate -no-color

      - name: Terraform Plan
        id: plan
        working-directory: terraform
        run: terraform plan -no-color
        if: github.event_name == 'pull_request'
        continue-on-error: true

      - uses: actions/github-script@v6
        if: github.event_name == 'pull_request'
        env:
          PLAN: "terraform\n${{ steps.plan.outputs.stdout }}"
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const output = `#### Terraform Format and Style 🖌\`${{ steps.fmt.outcome }}\`
            #### Terraform Initialization ⚙️\`${{ steps.init.outcome }}\`
            #### Terraform Validation 🤖\`${{ steps.validate.outcome }}\`
            <details><summary>Validation Output</summary>

            \`\`\`\n
            ${{ steps.validate.outputs.stdout }}
            \`\`\`

            </details>

            #### Terraform Plan 📖\`${{ steps.plan.outcome }}\`

            <details><summary>Show Plan</summary>

            \`\`\`\n
            ${process.env.PLAN}
            \`\`\`

            </details>

            *Pushed by: @${{ github.actor }}, Action: \`${{ github.event_name }}\`*`;

            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: output
            })

      - name: Terraform Plan Status
        if: steps.plan.outcome == 'failure'
        working-directory: terraform
        run: exit 1

      - name: Terraform Apply
        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
        working-directory: terraform
        run: terraform apply -auto-approve -input=false