name: Book

on:
  push:
    branches:
    - master
    - staging
    - trying
  pull_request:
    paths:
    - 'book/**'
    - '.github/workflows/book.yml'

jobs:
  book:
    name: Book
    runs-on: ubuntu-latest
    env:
      MDBOOK_VERSION: '0.4.12'
      MDBOOK_LINKCHECK_VERSION: '0.7.4'
      MDBOOK_MERMAID_VERSION: '0.8.3'
    steps:
    - uses: actions/checkout@v2
    - name: Install mdbook
      run: |
        curl -L https://github.com/rust-lang/mdBook/releases/download/v$MDBOOK_VERSION/mdbook-v$MDBOOK_VERSION-x86_64-unknown-linux-gnu.tar.gz | tar xz -C ~/.cargo/bin
        curl -L https://github.com/badboy/mdbook-mermaid/releases/download/v$MDBOOK_MERMAID_VERSION/mdbook-mermaid-v$MDBOOK_MERMAID_VERSION-x86_64-unknown-linux-gnu.tar.gz | tar xz -C ~/.cargo/bin
        curl -L https://github.com/Michael-F-Bryan/mdbook-linkcheck/releases/download/v$MDBOOK_LINKCHECK_VERSION/mdbook-linkcheck.v$MDBOOK_LINKCHECK_VERSION.x86_64-unknown-linux-gnu.zip -O
        unzip mdbook-linkcheck.v$MDBOOK_LINKCHECK_VERSION.x86_64-unknown-linux-gnu.zip -d ~/.cargo/bin
        chmod +x ~/.cargo/bin/mdbook-linkcheck
    - name: Build
      run: mdbook build
      working-directory: book
    - uses: actions/upload-artifact@v2
      with:
        name: book
        path: book/book/html

  deploy:
    name: Deploy
    runs-on: ubuntu-latest
    needs: book
    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
    steps:
    - uses: actions/download-artifact@v2
      with:
        name: book
    - uses: peaceiris/actions-gh-pages@v3
      with:
        github_token: ${{ secrets.GITHUB_TOKEN }}
        publish_dir: .