terraform.yml

name: 'Terraform Azure Deployment'

on:
  workflow_dispatch:
    inputs:
      action:
        type: choice
        description: Terraform action
        required: true
        options: 
        - plan
        - apply
        - destroy
        default: plan
      directory:
        type: choice
        description: Terraform directory to apply
        required: true
        options: 
        - terraform
        - terraform-init
        default: terraform
      workspace:
        type: choice
        description: Terraform workspace used for staging
        required: true
        options: 
        - dev
        - dev2
        - qa
        - prod
        default: dev
      module:
        type: choice
        description: Terraform module to target
        required: false
        options: 
        - all
        - acr
        - runner
        - network
        - acg
        default: ''


jobs:
  terraform:
    name: 'Terraform Apply'
    runs-on: ubuntu-latest

    steps:
      - name: 'Checkout Repository'
        uses: actions/checkout@v4

      - name: 'Setup Terraform'
        uses: hashicorp/setup-terraform@v3
        with:
          terraform_version: 1.9.5

      - uses: actions/setup-python@v5
        with:
          python-version: '3.12' 
          working-directory: ${{ github.event.inputs.directory }}
      - run: |
          python -m venv venv
          source venv/Scripts/activate
          pip install -r requirements.txt
        working-directory: ${{ github.event.inputs.directory }}

      - name: 'Terraform Init'
        if: github.event.inputs.directory != ''
        working-directory: ${{ github.event.inputs.directory }}
        env: 
          ARM_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
          ARM_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
          ARM_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
          ARM_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
          GITHUB_TOKEN: ${{ secrets.GH_PAT_TOKEN }}
          GITHUB_OWNER: ${{ vars.GH_OWNER }}
        run: |

          az login --service-principal -u $ARM_CLIENT_ID -p $ARM_CLIENT_SECRET --tenant $ARM_TENANT_ID 
          az account set --subscription $ARM_SUBSCRIPTION_ID

          if [[ "$(basename $PWD)" == "terraform" ]]; then
            source scripts/helper.sh
            export RESOURCE_GROUP_NAME=$(extract_value "resource_group_name" config.azurerm.tfbackend)
            export STORAGE_ACCOUNT_NAME=$(extract_value "storage_account_name" config.azurerm.tfbackend)
            export ARM_ACCESS_KEY=$(az storage account keys list --resource-group $RESOURCE_GROUP_NAME --account-name $STORAGE_ACCOUNT_NAME --query '[0].value' -o tsv)
            terraform init --backend-config=config.azurerm.tfbackend
          fi

          terraform workspace list
          terraform workspace select --or-create ${{github.event.inputs.workspace}}
          terraform workspace list

      - name: 'Terraform Plan'
        if: github.event.inputs.directory != ''
        working-directory: ${{ github.event.inputs.directory }}
        env: 
          ARM_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
          ARM_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
          ARM_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
          ARM_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
          GITHUB_TOKEN: ${{ secrets.GH_PAT_TOKEN }}
          GITHUB_OWNER: ${{ vars.GH_OWNER }}
        run: |
          if [[ "${{ github.event.inputs.module }}" == "all" ]]; then
            terraform plan -out main.tfplan
          else
            terraform plan -target=module.${{ github.event.inputs.module }} -out main.tfplan
          fi

      - name: 'Terraform apply'
        if: |
          github.event.inputs.action == 'apply' &&
          github.event.inputs.directory != ''
        working-directory: ${{ github.event.inputs.directory }}
        env: 
          ARM_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
          ARM_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
          ARM_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
          ARM_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
          GITHUB_TOKEN: ${{ secrets.GH_PAT_TOKEN }}
          GITHUB_OWNER: ${{ vars.GH_OWNER }}
        run: |
          terraform apply -auto-approve main.tfplan 

      - name: 'Terraform destroy'
        if: |
          github.event.inputs.action == 'destroy' &&
          github.event.inputs.directory != ''
        working-directory: ${{ github.event.inputs.directory }}
        env: 
          ARM_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
          ARM_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
          ARM_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
          ARM_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
          GITHUB_TOKEN: ${{ secrets.GH_PAT_TOKEN }}
          GITHUB_OWNER: ${{ vars.GH_OWNER }}
        run: |
          terraform destroy -target=module.${{ github.event.inputs.module }} -auto-approve