deploy-app.yml

name: Deploy App

on:
  push:
    branches:
      - main
    paths:
      - 'app/**'
  pull_request:
    paths:
      - 'app/**'
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
  cancel-in-progress: true

env:
  NIX_VERSION: nix-2.13.2
  NIXPKGS_CHANNEL: nixos-22.11
  NODE_OPTIONS: '--no-warnings'
  ACTIONS_RUNNER_DEBUG: true
  ASTRO_TELEMETRY_DISABLED: true

jobs:
  deploy:
    runs-on: ubuntu-latest
    permissions: write-all
    env:
      npm_config_yes: true
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          lfs: true

      - name: Install Nix
        uses: cachix/install-nix-action@v25
        with:
          nix_path: nixpkgs=channel:${{ env.NIXPKGS_CHANNEL }}
          github_access_token: ${{ github.token }}
      - run: |
          nix-channel --add https://nixos.org/channels/${{ env.NIXPKGS_CHANNEL }} nixpkgs
          nix-channel --update

      - name: Build App
        run: nix build .#app

        # deploy to `https://union.build` when branch is main AND trigger is push OR workflow_dispatch
      - name: '[production] 🔶 Publish to Cloudflare Pages'
        if: github.ref == 'refs/heads/main' && (github.event_name == 'push' || github.event_name == 'workflow_dispatch')
        env:
          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_WORKERS_API_TOKEN }}
        run: npx --yes wrangler@latest pages --project-name="app" --branch="main" deploy result

        # create preview deployment when trigger is workflow_dispatch && branch is not main
      - name: '[workflow-dispatch] 🔶 Publish to Cloudflare Pages'
        if: github.event_name == 'workflow_dispatch' && github.ref != '/refs/heads/main' 
        env:
          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_WORKERS_API_TOKEN }}
        run: npx --yes wrangler@latest pages --project-name="app" deploy result

        # create preview deployment when trigger is pull_request, then post preview deployment url as a pr comment
      - name: '[preview] 🔶 Publish to Cloudflare Pages'
        if: github.event_name == 'pull_request'
        env:
          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_WORKERS_API_TOKEN }}
        run: npx --yes wrangler@latest pages --project-name="app" deploy result >> /tmp/app_deploy.txt

      - name: Set Deploy Output
        if: github.event_name == 'pull_request'
        run: |
          {
            echo 'DEPLOY_OUTPUT<<EOF'
            tail -n 2 /tmp/app_deploy.txt
            echo 'EOF'
          } >> $GITHUB_ENV

      - name: Comment on Pull Request
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v7
        env:
          LAST_UPDATED_AT: ${{ github.event.repository.updated_at }}
        with:
          debug: true
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const commentBody = `
              <h1>App 🤌</h1>
              ${process.env.DEPLOY_OUTPUT}

              **${process.env.LAST_UPDATED_AT}**
            `
            const prComments = await github.rest.issues.listComments({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo
            })
            const [botDeploymentComment] = prComments.data.filter(comment => comment.user?.login === 'github-actions[bot]')
            if (!botDeploymentComment) {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: commentBody
              })
            } else {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: botDeploymentComment.id,
                body: commentBody
              })
            }