update_book.yml

name: Rebuild and deploy book to gh-pages branch
on:
  push:
    branches:
      - production
    paths:
      - 'index.Rmd'
      - '_bookdown.yml'
      - '_output.yml'
      - 'source/*.Rmd'
      - 'source/*.bib'
      - 'source/*.css'
      - 'data/**'
      - 'img/**'
      - 'build_html.sh'
      
jobs:
  deploy-book:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      packages: write

    steps:
      - name: checkout gh-pages
        uses: actions/checkout@v2
        with:
          ref: 'gh-pages'

      - name: Copy contents of dev/ to home folder
        run: |
          yes | cp -rf dev $HOME

      # Push update website to dev/ and clean out old commits
      - name: Update website to contents of dev, remove all old commits and subpages
        uses: peaceiris/actions-gh-pages@v3.8.0
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: dev/
          force_orphan: true # this will clean up all previous PR previews / main branch preview
          cname: datasciencebook.ca

      - name: checkout gh-pages again (to grab new orphaned upstream branch)
        uses: actions/checkout@v2
        with:
          ref: 'gh-pages'

      - name: copy dev/ website back in
        run: |
          yes | cp -rf $HOME/dev dev

      - name: push the result to gh-pages
        uses: stefanzweifel/git-auto-commit-action@v5