GitHub Action to build and push Hugo website to a separate GitHub Pages repo

.github-workflows-release-website.yml

name: Release website

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
    
  workflow_dispatch:
  
jobs:
  build-website:
    runs-on: ubuntu-latest

    steps:
      - name: Check out repo
        uses: actions/checkout@v2
        with:
          lfs: true
        
      - name: Check out target
        uses: actions/checkout@v2
        with:
          repository: ${{ secrets.WEBSITE_REPOSITORY }}
          ref: ${{ secrets.WEBSITE_RELEASE_BRANCH }}
          token: ${{ secrets.WEBSITE_TOKEN }}          
          path: ${{ secrets.WEBSITE_DIR }}
          lfs: false
          
      - name: Setup Go environment
        uses: actions/setup-go@v2

      - name: Build website
        run: make website
        
      - name: Commit changes
        env:
          REMOTE: https://${{ secrets.WEBSITE_ACTOR }}:${{ secrets.WEBSITE_TOKEN }}@github.com/${{ secrets.WEBSITE_REPOSITORY }}.git
        run: |
          cd ${{ secrets.WEBSITE_DIR }}
          git config user.name ${{ secrets.WEBSITE_GIT_USER_NAME }}
          git config user.email ${{ secrets.WEBSITE_GIT_USER_EMAIL }}
          git add --all
          if git commit -m "built from GitHub Action"; then
            git remote add website "${{ env.REMOTE }}"
            git push website ${{ secrets.WEBSITE_RELEASE_BRANCH }}
          else
            echo "Nothing has changed -- not releasing"
          fi
          

The relevant Makefile target looks like this:

hugo := ./tools/bin/$(shell uname -s)/hugo
publish_site_dir := $(publish_repo_dir)/docs

website:
	$(hugo) --destination $(publish_site_dir) --minify --cleanDestinationDir