minify.yml

# This workflow is triggered by a push to the `main` branch
# which it checks out, minimises the appropriate html/css/js
# in-place, and pushes the changes to the `gh-pages` branch

name: minify
run-name: Minify JS/CSS/HTML [gh-pages branch]

# Run on pushes to `main` branch
on:
  push:
    branches:
      - 'main'

jobs:
  checkout-minify-push:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      # Install NodeJS and CLI tools
      - uses: actions/setup-node@v3
        with:
          node-version: '16'
      - run: npm install -g terser
      - run: npm install -g csso-cli
      - run: npm install -g html-minifier

      # Perform minification, overwriting original files
      - run: terser ./script.js --compress --mangle -o ./script.js
      - run: terser ./sw.js --compress --mangle -o ./sw.js
      - run: csso ./css/style.css -o ./css/style.css
      - run: html-minifier --collapse-boolean-attributes --collapse-whitespace --minify-css --minify-js --minify-urls --remove-attribute-quotes --remove-comments --remove-empty-attributes --remove-optional-tags --remove-redundant-attributes --remove-script-type-attributes --remove-style-link-type-attributes --remove-tag-whitespace --use-short-doctype -o ./index.html ./index.html

      # (Force) push changes to `gh-pages` branch
      - run: |
          git config user.name aricooperdavis
          git config user.email aricooperdavis@user.noreply.github.com
          git commit -am 'Automated minify of ${{ github.sha }}'
          git push --force -u origin main:gh-pages