preview.yml

# Preview deploys on every pull request.
#
# This workflow uses the bundled local control plane (no external tokens): it
# starts `deploy server` on the runner, deploys the PR branch to a
# `preview-<branch>` alias, and comments the URL on the PR.
#
# To deploy previews to Netlify/Vercel instead, add secrets (NETLIFY_AUTH_TOKEN
# or VERCEL_TOKEN) and replace the deploy step with:
#   deploy login --provider netlify --token ${{ secrets.NETLIFY_AUTH_TOKEN }}
#   deploy preview --provider netlify --no-build

name: Preview deploy

on:
  pull_request:

permissions:
  contents: read
  pull-requests: write

jobs:
  preview:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: 24

      - name: Install dependencies
        run: npm ci

      - name: Start local control plane
        run: node cli.js server --port 8787 --storage .deploy-storage --token dev-token &

      - name: Wait for server
        run: |
          for i in $(seq 1 15); do
            if curl -sf --max-time 2 http://localhost:8787/ > /dev/null 2>&1; then
              echo "Server ready"
              exit 0
            fi
            sleep 1
          done
          echo "::error::Local control plane failed to start"
          exit 1

      - name: Login
        run: DEPLOY_CONFIG_DIR=$RUNNER_TEMP/dc node cli.js login --server http://localhost:8787

      - name: Preview deploy
        id: deploy
        run: |
          cd examples/sample-site
          DEPLOY_CONFIG_DIR=$RUNNER_TEMP/dc node ../../cli.js preview --json 2>&1 | tee deploy.log
          sed -n '/^{/,$p' deploy.log > preview.json
          echo "Preview deploy output:"
          cat deploy.log
          echo "Parsed JSON:"
          cat preview.json
          URL=$(node -p "JSON.parse(require('fs').readFileSync('preview.json','utf8')).url || ''")
          echo "url=$URL" >> "$GITHUB_OUTPUT"

      - name: Comment URL on the PR
        if: steps.deploy.outputs.url != ''
        uses: actions/github-script@v7
        with:
          script: |
            const url = '${{ steps.deploy.outputs.url }}';
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: `🚀 **Preview deploy ready:** ${url}\n\n_Deployed by deploy-cli on PR #${context.issue.number}._`,
            });