name: Book

on:
  pull_request:
    branches:
      - master
    paths:
      - 'docs/**'
  push:
    branches:
      - master
    paths:
      - 'docs/**'

jobs:
  deploy_en:
    name: Deploy book on gh-pages
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Install mdBook
        uses: peaceiris/actions-mdbook@v1
      - name: Render book
        run: |
          mdbook build -d gh-pages docs/en
          mdbook build -d gh-pages docs/zh-CN
          mkdir gh_pages
          mv docs/en/gh-pages gh_pages/en
          mv docs/zh-CN/gh-pages gh_pages/zh-CN
          mv docs/index.html gh_pages
      - name: Deploy
        uses: peaceiris/actions-gh-pages@v2.5.1
        with:
          emptyCommits: true
          keepFiles: false
        env:
          ACTIONS_DEPLOY_KEY: ${{ secrets.ACTIONS_DEPLOY_KEY }}
          PUBLISH_BRANCH: gh-pages
          PUBLISH_DIR: docs/gh-pages