name: Deploy static site to pages

on:
  push:
    branches: ["main"]

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Deploy to shared pages volume
        run: |
          set -euo pipefail

          # Gitea/Actions exposes GitHub-compatible env var:
          #   GITHUB_REPOSITORY = "Owner/Repo"
          OWNER="$(echo "${GITHUB_REPOSITORY}" | cut -d/ -f1)"
          REPO="$(echo "${GITHUB_REPOSITORY}" | cut -d/ -f2)"

          TARGET="/target/${OWNER}/${REPO}"

          echo "Deploying ${GITHUB_REPOSITORY} -> ${TARGET}"
          echo "Using docker volume: gitea_pages_root"

          docker run --rm \
            -v gitea_pages_root:/target \
            -v "$PWD":/src \
            alpine:3.20 sh -lc '
              apk add --no-cache rsync >/dev/null
              mkdir -p "'"$TARGET"'"
              rsync -av --delete /src/ "'"$TARGET"'"/ \
                --exclude ".git" \
                --exclude ".gitea"
            '