use `#check_failure` command to erase errors #12

	name: Deploy to github pages

	on:
	pull_request:
	push:
	branches:
	- master
	workflow_dispatch:

	# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
	permissions:
	contents: read
	pages: write
	id-token: write

	# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
	# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
	concurrency:
	group: "pages"
	cancel-in-progress: false

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: checkout
	uses: actions/checkout@v4

	- name: install elan
	run: \|
	curl https://raw.githubusercontent.com/leanprover/elan/master/elan-init.sh -sSf \| sh -s -- -y --default-toolchain $(cat lean-toolchain)
	echo "$HOME/.elan/bin" >> $GITHUB_PATH

	# note: `lake run build` raise an error in GitHub Action
	- name: build markdown files by mdgen
	run: lake exe mdgen lean md

	- name: setup mdBook
	uses: peaceiris/actions-mdbook@v1
	with:
	mdbook-version: '0.4.32'

	- name: build html from markdown
	run: mdbook build

	- name: upload artifact
	uses: actions/upload-pages-artifact@v2
	with:
	path: ./book

	deploy:
	if: github.ref == 'refs/heads/master'
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	needs: build
	steps:
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v3

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