minify assets #21

	# 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

	# Inspired by: https://stackoverflow.com/a/73882805/11035513

	name: minify-assets
	run-name: minify assets

	# Run on pushes to `release` branch
	on:
	push:
	branches:
	- release

	jobs:
	checkout-minify-push:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	# Install NodeJS and CLI tools
	- uses: actions/setup-node@v4
	with:
	node-version: 20
	- run: npm install -g terser
	- run: npm install -g csso-cli
	- run: npm install -g html-minifier
	- run: npm install -g svgo

	# Perform minification, overwriting original files
	- run: terser ./scripts/timeline.js --compress --mangle --output ./scripts/timeline.js
	- run: \|
	css_font_files=$(ls ./styles/*.css)
	echo "$css_font_files" \| while IFS= read -r file; do
	echo "Minifying $file"
	csso --force-media-merge $file --output $file
	done
	- run: html-minifier --case-sensitive --collapse-inline-tag-whitespace --collapse-whitespace --minify-css --minify-js --minify-urls --quote-character='"' --remove-comments index.html --output index.html
	- run: svgo -f ./images -o ./images

	# (Force) push changes to `gh-pages` branch
	- run: \|
	git config user.name stepanjakl
	git config user.email [email protected]
	git commit -am "Automated minify of ${{ github.sha }}"
	git push --force -u origin release:gh-pages

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