build.yml

name: Build & Publish

on:
  push:
    branches: [main]
  workflow_dispatch:
  pull_request:

# automatically cancel previous runs on the same PR
# https://stackoverflow.com/questions/66335225/how-to-cancel-previous-runs-in-the-pr-when-you-push-new-commitsupdate-the-curre/67939898#67939898
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-22.04
    steps:
      # inspired by
      # https://github.com/rstudio/ai-blog/blob/c07dff9c18859ba682ee112ed45c7c3115c86e71/.github/workflows/main.yml

      - uses: actions/checkout@v3
        with:
          submodules: recursive 

      - uses: r-lib/actions/setup-r@v2

      - uses: r-lib/actions/setup-pandoc@v2

      - name: Cache R Packages
        uses: actions/cache@v3
        with:
          path: ${{ env.R_LIBS_USER }}
          key: ${{ hashFiles('.github/R-version') }}-${{ hashFiles('.github/pkg-versions.Rds') }}-${{ hashFiles('.github/pkg-deps.Rds') }}
          restore-keys: ${{ hashFiles('.github/R-version') }}-

      - name: Install blogdown
        run: install.packages("blogdown")
        shell: Rscript {0}

      - name: Install hugo
        run: blogdown::install_hugo(extended = TRUE, version = "0.111.3")
        shell: Rscript {0}

      - name: Blogdown build
        run: blogdown::build_site(build_rmd = "newfile")
        shell: Rscript {0}

      - name: Deploy to Github Pages
        if: github.ref == 'refs/heads/main'
        uses: JamesIves/github-pages-deploy-action@v4.2.5
        with:
          branch: gh-pages # The branch the action should deploy to.
          folder: public # The folder the action should deploy.
          clean-exclude: ".nojekyll"