name: GitHub Pages

on:
  push:
    branches:
      - master

jobs:
  deploy:
    runs-on: ubuntu-20.04
    concurrency:
      group: ${{ github.workflow }}-${{ github.ref }}
    steps:
      - uses: actions/checkout@v2

      - name: Setup mdBook
        uses: peaceiris/actions-mdbook@v1
        with:
          mdbook-version: '0.4.8'
          # mdbook-version: 'latest'

      - run: mdbook build ./docs

      - name: Set up JDK 8
        uses: actions/setup-java@v2
        with:
          java-version: '8'
          distribution: 'adopt'

      - name: Maven site
        run: mvn clean compile site && mv ./target/site ./docs/book/site

      - name: Deploy
        uses: peaceiris/actions-gh-pages@v3
        if: ${{ github.ref == 'refs/heads/master' }}
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./docs/book