terraform.yml

name: "Terraform"
on:
  push:
    branches:
      - main
    paths:
      - terraform/**
  pull_request:
    branches:
      - main
    paths:
      - terraform/**
jobs:
  terraform:
    name: "Terraform"
    runs-on: ubuntu-latest
    env:
      tf_actions_working_dir: './terraform'
    defaults:
      run:
        working-directory: ${{ env.tf_actions_working_dir }}
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set Workspace
        id: set_workspace
        run: |
          prod="${{ github.event.pull_request.base.ref == 'tf_prod' || github.ref == 'refs/head/tf_prod' }}"
          if [ "$prod" = true ]; then
            echo "::set-output name=environment::prod"
          else
            echo "::set-output name=environment::dev"
          fi
      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v1
        with:
          # terraform_version: 0.13.0:
          cli_config_credentials_token: ${{ secrets.TF_API_TOKEN }}

      - name: Terraform Format
        id: fmt
        run: terraform fmt -check

      - name: Terraform Init
        id: init
        run: terraform init
        env:
          TF_WORKSPACE: ${{ steps.set_workspace.outputs.environment }}
      - name: Terraform Plan
        id: plan
        if: github.event_name == 'pull_request'
        run: terraform plan -no-color
        continue-on-error: true
        env:
          TF_WORKSPACE: ${{ steps.set_workspace.outputs.environment }}
      - uses: actions/github-script@0.9.0
        if: github.event_name == 'pull_request'
        env:
          PLAN: "terraform\n${{ steps.plan.outputs.stdout }}"
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const output = `#### Terraform Format and Style 🖌\`${{ steps.fmt.outcome }}\`
            #### Terraform Initialization ⚙️\`${{ steps.init.outcome }}\`
            #### Terraform Plan 📖\`${{ steps.plan.outcome }}\`

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

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

            </details>

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


            github.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'
        run: exit 1

      - name: Terraform Apply
        if: (github.ref == 'refs/heads/main' || github.ref == 'refs/head/tf_prod') && github.event_name == 'push'
        run: terraform apply -auto-approve
        env:
          TF_WORKSPACE: ${{ steps.set_workspace.outputs.environment }}