Update actions/checkout action to v4.1.5 #224

	name: mdbook

	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	mdbook:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
	with:
	fetch-depth: 0

	- name: setup mdbook
	uses: peaceiris/[email protected]
	with:
	mdbook-version: 'latest'

	- name: preprocess
	shell: bash
	run: ./prepro.sh

	- name: build
	run: mdbook build

	- name: prepare deploy
	run: \|
	git config --local user.name "github-actions[bot]"
	git config --local user.email "github-actions[bot]@users.noreply.github.com"
	git worktree add gh-pages gh-pages
	cd gh-pages
	# Delete the ref to avoid keeping history.
	git update-ref -d refs/heads/gh-pages
	rm -rf ./*
	mv ../book/* .
	git add .
	git commit -m "Deploy $GITHUB_SHA to gh-pages"

	- name: deploy
	if: ${{ github.ref == 'refs/heads/main' }}
	working-directory: ./gh-pages
	run: \|
	git push -f origin gh-pages

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