.github/workflows/terraform-plan.yml

gistfile1.txt

name: Terraform Plan Commenter

on:
  pull_request:
    branches: [ "main" ]

jobs:
  terraform-plan:
    name: 'Terraform Plan'
    runs-on: ubuntu-latest
    env:
      # You need to add this to your GitHub repository secrets
      TF_API_TOKEN: ${{ secrets.TF_API_TOKEN }} 

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

    - name: Setup Terraform
      uses: hashicorp/setup-terraform@v3
      with:
        cli_config_credentials_token: ${{ secrets.TF_API_TOKEN }}

    - name: Terraform Init
      id: init
      run: terraform init

    - name: Terraform Plan
      id: plan
      run: terraform plan -no-color
      continue-on-error: true

    - name: Post Plan to PR Comment
      uses: actions/github-script@v7
      if: github.event_name == 'pull_request'
      env:
        PLAN: "terraform\n${{ steps.plan.outputs.stdout }}"
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}
        script: |
          const output = `#### Terraform Initialization ⚙️\`${{ steps.init.outcome }}\`
          #### Terraform Plan 📖\`${{ steps.plan.outcome }}\`
          
          <details><summary>Show Plan</summary>
          
          \`\`\`\n
          ${process.env.PLAN}
          \`\`\`
          
          </details>`;
            
          github.rest.issues.createComment({
            issue_number: context.issue.number,
            owner: context.repo.owner,
            repo: context.repo.repo,
            body: output
          })