Bump peaceiris/actions-gh-pages from 3.9.3 to 4.0.0 #84

	name: build-book
	on:
	pull_request:

	env:
	CACHE_NUMBER: 0 # increase to reset cache manually

	jobs:
	build-and-upload:
	runs-on: ubuntu-latest
	defaults:
	run:
	shell: bash -l {0}
	steps:
	- uses: actions/checkout@v4

	- name: Setup Mambaforge
	uses: conda-incubator/setup-miniconda@v3
	with:
	miniforge-variant: Mambaforge
	miniforge-version: latest
	activate-environment: book-render
	use-mamba: true

	- name: Set cache date
	run: echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV

	- uses: actions/cache@v4
	with:
	path: /usr/share/miniconda3/envs/book-render
	key: linux-64-conda-${{ hashFiles('render-environment.yml') }}-${{ env.DATE }}-${{ env.CACHE_NUMBER }}
	id: cache

	- name: Update environment
	if: steps.cache.outputs.cache-hit != 'true'
	run: mamba env update -n book-render -f render-environment.yml

	- name: Build the book
	run: \|
	jupyter-book build .

	- name: Zip the book
	run: \|
	set -x
	set -e
	if [ -f book.zip ]; then
	rm -rf book.zip
	fi
	zip -r book.zip _build/html

	- name: Upload zipped book artifact
	uses: actions/upload-artifact@v4
	with:
	name: book-zip-${{github.event.number}}
	path: ./book.zip

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