on:
  push:
    branches: master

name: bookdown

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

jobs:
  build:
    runs-on: ubuntu-16.04
    env:
      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
      RSPM: https://packagemanager.rstudio.com/cran/__linux__/xenial/latest
    steps:
      - name: Checkout repo
        uses: actions/checkout@v2

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

      - name: Get R version
        id: get-r-version
        run: |
          echo "::set-output name=version::$(Rscript -e 'cat(as.character(getRversion()))')"
        shell: bash

      - name: Cache R packages
        uses: actions/cache@v2
        with:
          path: ${{ env.R_LIBS_USER }}
          key: ${{ runner.os }}-${{ steps.get-r-version.outputs.version }}-2-

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

      - name: Install system dependencies
        if: runner.os == 'Linux'
        run: |
          while read -r cmd
          do
            eval sudo $cmd
          done < <(Rscript -e 'writeLines(pak::local_system_requirements("ubuntu", "16.04"))')

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

      - name: Install pandoc and pandoc citeproc
        run: |
          brew install pandoc
          brew install pandoc-citeproc

      - name: Cache bookdown results
        uses: actions/cache@v2
        with:
          path: _bookdown_files
          key: bookdown-${{ hashFiles('**/*Rmd') }}
          restore-keys: bookdown-

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

      - name: Deploy to Netlify
        if: contains(env.isExtPR, 'false')
        id: netlify-deploy
        uses: nwtgck/actions-netlify@v1.1
        with:
          publish-dir: './_book'
          production-branch: master
          github-token: ${{ secrets.GITHUB_TOKEN }}
          deploy-message:
            'Deploy from GHA: ${{ github.event.pull_request.title || github.event.head_commit.message }} (${{ github.sha }})'
          enable-pull-request-comment: false
          enable-commit-comment: false
        env:
          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
          NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
        timeout-minutes: 1