azurerm-service-principal-terraform-plan.yml

name: "Terraform Plan"
on: pull_request
jobs:
  terraform:
    name: "Run Terraform Plan"
    runs-on: ubuntu-latest
    # Add env variables for service principal
    env:
      ARM_CLIENT_ID: ${{ secrets.TF_VAR_ARM_CLIENT_ID }}
      ARM_CLIENT_SECRET: ${{ secrets.TF_VAR_ARM_CLIENT_SECRET }}
      ARM_SUBSCRIPTION_ID: ${{ secrets.TF_VAR_ARM_SUBSCRIPTION_ID }}
      ARM_TENANT_ID: ${{ secrets.TF_VAR_ARM_TENANT_ID }}    
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v1
        with:
          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
     
      - name: Terraform Plan
        id: plan
        run: terraform plan