terraform-github.yml

---
name: Terraform GitHub
"on":
  push:
    branches: [main]
    paths:
      - ".github/workflows/terraform-github.yml"
      - "terraform/github/**"
  pull_request:
    branches: [main]
    paths:
      - ".github/workflows/terraform-github.yml"
      - "terraform/github/**"
  workflow_dispatch:
env:
  TF_VAR_GITHUB_APP_PEM_FILE: ${{ secrets.TF_VAR_GITHUB_APP_PEM_FILE }}
  AWS_ACCESS_KEY_ID: ${{ secrets.TF_S3_ACCESS_KEY_ID }}
  AWS_SECRET_ACCESS_KEY: ${{ secrets.TF_S3_SECRET_ACCESS_KEY }}
jobs:
  terraform:
    name: Terraform
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: "./terraform/github/"
    steps:
      - name: Checkout Repository
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@5e8dbf3c6d9deaf4193ca7a8fb23f2ac83bb6c85 # v4.0.0

      - name: Terraform fmt
        id: fmt
        run: terraform fmt -check
        continue-on-error: true

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

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

      - name: Terraform Plan
        id: plan
        run: |
          terraform plan -out=plan.tmp
          terraform show -no-color plan.tmp >${GITHUB_WORKSPACE}/plan.out
        continue-on-error: true

      - name: Install fs module
        run: npm install fs

      - uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8
        if: github.event_name == 'pull_request'
        with:
          github-token: ${{ secrets.repository_configuration_token }}
          script: |
            const { readFile } = require("fs/promises")
            const data = await readFile('plan.out')

            const plan = "terraform\n" + data.length > 65000 ? `${data.substring(0, 65000)}...` : data

            // 1. Retrieve existing bot comments for the PR
            const { data: comments } = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
            })
            const botComment = comments.find(comment => {
              return comment.user.login === 'stackhpc-ci' && comment.body.includes('Terraform Format and Style')
            })

            // 2. Prepare format of the comment
            const output = `#### Terraform Format and Style 🖌\`${{ steps.fmt.outcome }}\`
            #### Terraform Initialization ⚙️\`${{ steps.init.outcome }}\`
            #### Terraform Validation 🤖\`${{ steps.validate.outcome }}\`
            <details><summary>Validation Output</summary>

            \`\`\`\n
            ${{ steps.validate.outputs.stdout }}
            \`\`\`

            </details>

            #### Terraform Plan 📖\`${{ steps.plan.outcome }}\`

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

            \`\`\`\n
            ${process.env.PLAN}
            \`\`\`

            </details>

            *Pusher: @${{ github.actor }}, Action: \`${{ github.event_name }}\`, Working Directory: \`${{ env.tf_actions_working_dir }}\`, Workflow: \`${{ github.workflow }}\`*`;

            // 3. If we have a comment, update it, otherwise create a new one
            if (botComment) {
              github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: botComment.id,
                body: output
              })
            } else {
              github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: output
              })
            }

      - name: Terraform Format Status
        if: steps.fmt.outcome == 'failure'
        run: exit 1

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

      - name: Terraform Apply
        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
        run: terraform apply -auto-approve -input=false

      - name: Send message to Slack via Workflow Builder
        uses: ./.github/actions/slack-alert
        with:
          slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL }}
          slack-channel-id: ${{ vars.SLACK_CHANNEL_ID }}
        if: failure() && github.ref == 'refs/heads/main' && github.event_name == 'push'