plan.yml

name: plan
on:
  pull_request:

env:
  GCP_PROJECT_ID: ian-harris-test01
  GCP_STATE_BUCKET: ian-harris-test01-terraform-state
  GCP_STATE_PREFIX: default

jobs:
  plan:
    name: Terraform plan
    runs-on: ubuntu-latest
    environment: feature

    steps:

    - name: Checkout
      uses: actions/checkout@v2

    - name: Set up Cloud SDK - R/O account
      uses: google-github-actions/setup-gcloud@master
      with:
        project_id: ${{ env.GCP_PROJECT_ID }}
        service_account_key: ${{ secrets.RO_KEY }}
        export_default_credentials: true

    - name: Setup Terraform
      uses: hashicorp/setup-terraform@v1
      with:
        terraform_version: 1.0.5

    - name: Terraform Format
      id: fmt
      run: terraform -chdir=terraform fmt -list=true -write=false -diff=true -check=true
      continue-on-error: true

    - name: Terraform Init
      id: init
      run: terraform -chdir=terraform init -backend-config="bucket=${{ env.GCP_STATE_BUCKET }}" -backend-config="prefix=${{ env.GCP_STATE_PREFIX }}"

    - name: Terraform Validate
      id: validate
      run: terraform -chdir=terraform validate -no-color

    - name: Terraform Plan
      id: plan
      run: terraform -chdir=terraform plan -no-color -lock=false

    - name: Update Pull Request
      uses: actions/github-script@0.9.0
      if: always() && 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 }}\`
          #### Terraform Validation 🤖\`${{ steps.validate.outcome }}\`

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

          \`\`\`\n
          ${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
          })