⬆️ Bump actions/checkout from 2 to 4 (#311) #160

	name: Build Cache
	on:
	push:
	branches:
	- main
	schedule:
	# Run monthly to avoid stale cache
	- cron: '0 0 1 * *'
	jobs:
	cache:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: 3.11
	- name: Install Python Dependencies
	run: \|
	pip install -r requirements.txt
	- name: Install LaTeX dependencies
	run: \|
	sudo apt-get -qq update
	sudo apt-get install -y \
	texlive-latex-recommended \
	texlive-latex-extra \
	texlive-fonts-recommended \
	texlive-fonts-extra \
	texlive-xetex \
	latexmk \
	xindy \
	texlive-luatex \
	dvipng \
	ghostscript \
	cm-super
	- name: Set up Julia
	uses: julia-actions/setup-julia@v2
	with:
	version: 1.11.1
	- name: Install IJulia and Setup Project
	shell: bash
	run: \|
	julia -e 'using Pkg; Pkg.add("IJulia");'
	julia --project=lectures --threads auto -e 'using Pkg; Pkg.instantiate();'
	- name: Build HTML
	shell: bash -l {0}
	run: \|
	jb build lectures --path-output ./
	- name: Upload the "_build" folder (cache)
	uses: actions/upload-artifact@v4
	with:
	name: build-cache
	path: _build
	include-hidden-files: true

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