publish.yml

name: Publish to gh-pages

on:
  push:
    branches:
      - main

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
        with:
          node-version: "14"
      - run: npm install
      - run: npm run build
      - name: Publish
        run: |
          # Create a temporary directory
          export temp_dir=`mktemp -d -p ~`

          (
          # Preserve .git
          mkdir $temp_dir/temp
          mv .git $temp_dir/temp
          cd $temp_dir/temp

          # Switch branch
          git fetch
          git checkout gh-pages
          git reset --hard gh-pages
          )

          (
          # Move .git
          mv $temp_dir/temp/.git $temp_dir
          rm -rf $temp_dir/temp
          mv public/* $temp_dir
          mv LICENSE $temp_dir

          # Go to the temporary directory
          cd $temp_dir

          # Set commit identity
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git config user.name "github-actions[bot]"

          # Publish
          git add .
          if [ -n "$(git status --porcelain)" ]; then
            git commit -m "Publish `TZ='Asia/Hong_Kong' date`"
            git push -f origin gh-pages
          fi
          )