expo-preview.yml

name: Expo Preview
on:
  pull_request:

jobs:
  publish:
    name: Install and publish
    runs-on: ubuntu-latest
    if: github.event.pull_request.head.repo.owner.login == 'react-navigation'
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Setup
        uses: ./.github/actions/setup

      - name: Setup Expo
        uses: expo/expo-github-action@v7
        with:
          eas-version: latest
          token: ${{ secrets.EXPO_TOKEN }}

      - name: Publish Expo app
        working-directory: ./example
        run: CI=1 eas update --branch=pr-${{ github.event.number }} --message="$(git log -1 --pretty=%B)"
        env:
          EXPO_USE_DEV_SERVER: true

      - name: Get expo config
        working-directory: ./example
        id: expo
        run: echo "EXPO_CONFIG=$(npx expo config --json)" >> $GITHUB_OUTPUT

      - name: Comment on PR
        uses: actions/github-script@v3
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            const config = JSON.parse('${{ steps.expo.outputs.EXPO_CONFIG }}');

            const { sdkVersion } = config;
            const { projectId } = config.extra.eas;
            const channel = 'pr-${{ github.event.number }}';

            const url = `https://expo.dev/@react-navigation/react-navigation-example?serviceType=eas&distribution=expo-go&scheme=exp+react-navigation-example&channel=${channel}&sdkVersion=${sdkVersion}`;

            const body = `The Expo app for the example from this branch is ready!

            [${url}](${url})

            <a href="${url}"><img src="https://qr.expo.dev/eas-update?appScheme=exp&projectId=${projectId}&channel=${channel}&runtimeVersion=exposdk:${sdkVersion}&host=u.expo.dev" height="200px" width="200px"></a>
            `;

            const comments = await github.issues.listComments({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
            });

            if (comments.data.some(comment => comment.body === body)) {
              return;
            }

            github.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body
            })