preview-link.yml

name: Vercel deployment preview link generator

on:
  pull_request:
    types: [opened, synchronize]
    paths:
      - 'website/docs/docs/**'
      - 'website/docs/best-practices/**'
      - 'website/docs/guides/**'
      - 'website/docs/faqs/**'
      - 'website/docs/reference/**'

permissions:
  contents: read
  pull-requests: write

jobs:
  comment-deployment-link:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install GitHub CLI and jq
        run: |
          sudo apt-get update
          sudo apt-get install -y jq
          sudo apt-get install -y gh

      - name: Wait for Vercel deployment
        id: vercel_deploy
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          CHECK_RUN_ID=""
          ATTEMPTS=0
          MAX_ATTEMPTS=30  # Adjust as needed
          SLEEP_TIME=10    # Adjust as needed
          while [ $ATTEMPTS -lt $MAX_ATTEMPTS ]; do
            CHECK_RUNS=$(gh api repos/${{ github.repository }}/commits/${{ github.sha }}/check-runs)
            VERCEL_CHECK=$(echo $CHECK_RUNS | jq '.check_runs[] | select(.name=="Vercel")')
            if [ -n "$VERCEL_CHECK" ]; then
              STATUS=$(echo $VERCEL_CHECK | jq -r '.status')
              CONCLUSION=$(echo $VERCEL_CHECK | jq -r '.conclusion')
              if [ "$STATUS" == "completed" ]; then
                if [ "$CONCLUSION" == "success" ]; then
                  echo "Vercel deployment completed successfully."
                  VERCEL_URL=$(echo $VERCEL_CHECK | jq -r '.details_url')
                  echo "deployment_url=$VERCEL_URL" >> $GITHUB_OUTPUT
                  break
                else
                  echo "Vercel deployment failed."
                  exit 1
                fi
              else
                echo "Vercel deployment status: $STATUS. Waiting..."
              fi
            else
              echo "Vercel check not found. Waiting..."
            fi
            ATTEMPTS=$((ATTEMPTS + 1))
            sleep $SLEEP_TIME
          done
          if [ $ATTEMPTS -eq $MAX_ATTEMPTS ]; then
            echo "Vercel deployment did not complete within expected time."
            exit 1
          fi

      - name: Get changed files
        id: files
        run: |
          CHANGED_FILES=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }} | grep 'website/docs/docs/')
          echo "changed_files=$CHANGED_FILES" >> $GITHUB_OUTPUT

      - name: Generate file preview links
        id: links
        run: |
          DEPLOYMENT_URL="${{ steps.vercel_deploy.outputs.deployment_url }}"
          CHANGED_FILES="${{ steps.files.outputs.changed_files }}"
          LINKS=$(echo "$CHANGED_FILES" | sed 's#website/docs/docs/##; s/.md$//' | awk -v url="$DEPLOYMENT_URL" '{print "- [" $0 "](" url "/docs/" $0 ")"}')
          echo "links=$LINKS" >> $GITHUB_OUTPUT

      - name: Post comment with deployment link
        uses: peter-evans/create-or-update-comment@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            🚀 Deployment available: ${{ steps.vercel_deploy.outputs.deployment_url }}
            Here are the direct links to the updated files:

            ${{ steps.links.outputs.links }}