tf_plan_server.yml

### Reusable workflow to plan terraform deployment, create artifact and upload to workflow artifacts for consumption ###
name: "Build_TF_Plan"
on:
  workflow_call:
    inputs:
      path:
        description: "Specifies the path of the root terraform module."
        required: true
        type: string
      tf_version:
        description: "Specifies version of Terraform to use. e.g: 1.1.0 Default=latest."
        required: false
        type: string
        default: latest
      gh_environment:
        description: "Specifies the GitHub deployment environment."
        required: false
        type: string
        default: null
      tf_vars_file:
        description: "Specifies the Terraform TFVARS file."
        required: true
        type: string
      task_container_version:
        description: "Specifies the version of the container to deploy."
        required: true
        type: string
      task_container_registry:
        description: "Task Container Registry"
        required: true
        type: string
      task_container_name:
        description: "Task Container Name"
        required: true
        type: string
    secrets:
      cli_config_credentials_token:
        description: "CLI configuration credentials token"
        required: true
      azure_acr_username:
        description: "Azure ACR (Azure Container Registry) username"
        required: true
      azure_acr_password:
        description: "Azure ACR (Azure Container Registry) password"
        required: true
      azure_tenant_id:
        description: "Azure Tenant ID for the subscription"
        required: true
      azure_subscription_id:
        description: "Azure subscription ID"
        required: true
      azure_client_id:
        description: "Azure Client ID"
        required: true
      azure_client_secret:
        description: "Azure Client Secret"
        required: true
      github_personal_access_token:
        description: "GitHub Personal Access Token"
        required: true
      github_ssh_private_key:
        description: "GitHub SSH Key"
        required: true
jobs:
  build-plan:
    runs-on: ubuntu-latest
    timeout-minutes: 15
    environment: ${{ inputs.gh_environment }}
    defaults:
      run:
        shell: bash
        working-directory: ${{ inputs.path }}

    steps:
      - name: Checkout
        uses: actions/checkout@v3.1.0

      - name: Download file
        uses: actions/download-artifact@v2
        with:
          name: my-artifact
          path: ${{ github.workspace }}/${{ inputs.path }}

      - name: Display .auto.tfvars file content
        run: |
          cat ${{ github.workspace }}/${{ inputs.path }}/${{ inputs.gh_environment }}.auto.tfvars

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v2.0.2
        with:
          terraform_version: ${{ inputs.tf_version }}
          cli_config_credentials_token: ${{ secrets.cli_config_credentials_token }}

      - name: Terraform Init
        env:
          TF_WORKSPACE: ${{ inputs.gh_environment }}
        run: |
          eval `ssh-agent -s`
          ssh-add - <<< '${{ secrets.github_ssh_private_key }}'
          terraform init

      - name: Terraform Validate
        id: validate
        run: terraform validate

      - name: Terraform Plan
        id: plan
        env:
          TF_VAR_region: "us-west-1" #replace with your variable and value
          TF_VAR_azure_client_id: ${{ secrets.azure_client_id }}
          TF_VAR_azure_client_secret: ${{ secrets.azure_client_secret }}
          TF_VAR_subscription_id: ${{ secrets.azure_subscription_id }}
          TF_VAR_tenant_id: ${{ secrets.azure_tenant_id }}
          TF_VAR_task_container_registry: ${{ inputs.task_container_registry }}
          TF_VAR_task_container_name: ${{ inputs.task_container_name }}
          TF_VAR_task_container_version: ${{ inputs.task_container_version }}
          TF_VAR_azure_acr_username: ${{ secrets.azure_acr_username }}
          TF_VAR_azure_acr_password: ${{ secrets.azure_acr_password }}
          TF_VAR_github_personal_access_token: ${{ secrets.github_personal_access_token }}
          TF_VAR_environment: ${{ inputs.gh_environment }}
          TF_WORKSPACE: ${{ inputs.gh_environment }}
        run: terraform plan
        continue-on-error: true

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