build_book.yaml

on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master

name: build-book

env:
  isExtPR: ${{ github.event.pull_request.head.repo.fork == true }}

jobs:
  build:
    env:
      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
    runs-on: macOS-latest
    steps:
      - name: Checkout repo
        uses: actions/checkout@master

      - name: Setup R
        uses: r-lib/actions/setup-r@master

      - name: Setup pandoc
        uses: r-lib/actions/setup-pandoc@master

      - name: Cache R packages
        uses: actions/cache@v1
        with:
          path: ${{ env.R_LIBS_USER }}
          key: r-6-${{ hashFiles('DESCRIPTION') }}
          restore-keys: r-6-

      - name: Install pak
        run: |
          install.packages("pak", repos = "https://r-lib.github.io/p/pak/dev/")
        shell: Rscript {0}

      - name: Install dependencies
        run: |
          pak::local_install_dev_deps(upgrade = TRUE)
        shell: Rscript {0}

      - name: Cache bookdown results
        uses: actions/cache@v1
        with:
          path: _bookdown_files
          key: bookdown-2-${{ hashFiles('**/*Rmd') }}
          restore-keys: bookdown-2-

      - name: Build book
        run: Rscript -e 'bookdown::render_book("index.Rmd", quiet = TRUE)'

      - name: Deploy to GitHub Pages
        if: github.ref == 'refs/heads/master'
        uses: crazy-max/ghaction-github-pages@v2.2.0
        with:
          target_branch: gh-pages
          build_dir: _book
          jekyll: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}