GistPin/infrastructure/ci/cost-estimation.yml at main · ghzhost/GistPin · GitHub

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name: Terraform Cost Estimation

on:
  pull_request:
    paths:
      - 'infrastructure/terraform/**'
  workflow_dispatch:

permissions:
  contents: read
  pull-requests: write

env:
  INFRACOST_API_KEY: ${{ secrets.INFRACOST_API_KEY }}
  AWS_REGION: us-east-1

jobs:
  estimate-costs:
    name: Estimate Infrastructure Costs
    runs-on: ubuntu-latest

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

      - name: Setup Infracost
        uses: infracost/actions/setup@v3
        with:
          api-key: ${{ secrets.INFRACOST_API_KEY }}

      - name: Generate Infracost cost estimate
        id: infracost
        run: |
          infracost breakdown \
            --path infrastructure/terraform \
            --format json \
            --out-file /tmp/infracost.json

          # Generate human-readable summary
          infracost breakdown \
            --path infrastructure/terraform \
            --format table \
            --out-file /tmp/infracost-table.txt

      - name: Post cost diff as PR comment
        if: github.event_name == 'pull_request'
        uses: infracost/actions/comment@v3
        with:
          path: /tmp/infracost.json
          behavior: update
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Check budget thresholds
        run: |
          bash infrastructure/scripts/estimate-costs.sh \
            --infracost-json /tmp/infracost.json \
            --thresholds infrastructure/terraform/infracost.yml \
            --github-token ${{ secrets.GITHUB_TOKEN }} \
            --repo ${{ github.repository }} \
            --pr ${{ github.event.pull_request.number }}

      - name: Upload cost report artifact
        uses: actions/upload-artifact@v4
        with:
          name: cost-estimate
          path: |
            /tmp/infracost.json
            /tmp/infracost-table.txt
          retention-days: 30

      - name: Archive historical cost data
        if: success()
        run: |
          mkdir -p /tmp/cost-history
          TIMESTAMP=$(date -u +%Y%m%d-%H%M%S)
          cp /tmp/infracost.json "/tmp/cost-history/cost-${TIMESTAMP}.json"
          echo "Cost data archived for historical tracking"

      - name: Upload historical archive
        if: success()
        uses: actions/upload-artifact@v4
        with:
          name: cost-history
          path: /tmp/cost-history/