name: Build Eleventy

on:
  push:
    branches:
      - main
    paths-ignore:
      - 'maintenance/**'
      - 'README.md'
  pull_request:
    paths-ignore:
      - 'maintenance/**'
      - 'README.md'
  workflow_dispatch:

jobs:
  build:
    runs-on:
      - arch-linux

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

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "24"

      - name: Install dependencies
        run: npm ci

      - name: Build site
        run: npm run build

      - name: Publish to forgejo-pages
        if: github.ref == 'refs/heads/main'
        env:
          TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO_URL: ${{ github.server_url }}/${{ github.repository }}.git
        run: |
          git config --global user.name "Forgejo Actions"
          git config --global user.email "actions@localhost"

          # Clone repository
          git clone "https://oauth2:${TOKEN}@${REPO_URL#https://}" deploy
          cd deploy

          # Checkout or create forgejo-pages
          git fetch origin forgejo-pages || true
          if git ls-remote --exit-code --heads origin forgejo-pages >/dev/null 2>&1; then
            git checkout -B forgejo-pages origin/forgejo-pages
          else
            git checkout --orphan forgejo-pages
            git rm -rf . || true
          fi

          # Remove old files
          find . -mindepth 1 -maxdepth 1 ! -name .git -exec rm -rf {} +

          # Copy new site
          cp -a ../docs/. .

          # Commit and push if changed
          git add -A
          if ! git diff --cached --quiet; then
            git commit -m "Deploy ${GITHUB_SHA}"
            git push origin forgejo-pages
          fi