Update macOS installation instructions #180

	name: CI

	on:
	push: # Run CI for all branches except GitHub merge queue tmp branches
	branches-ignore:
	- "gh-readonly-queue/**"
	pull_request: # Run CI for PRs on any branch
	merge_group: # Run CI for the GitHub merge queue

	jobs:
	build:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable

	- name: Install Python dependencies
	run: \|
	pip3 install --user python-dateutil linkchecker
	- name: Put pip binary directory into path
	run: echo "~/.local/bin" >> $GITHUB_PATH

	- name: Cache Cargo installed binaries
	uses: actions/cache@v1
	id: cache-cargo
	with:
	path: ~/cargo-bin
	key: cache-cargo
	- name: Install mdbook
	if: steps.cache-cargo.outputs.cache-hit != 'true'
	uses: actions-rs/install@v0.1
	with:
	crate: mdbook
	version: latest
	- name: Copy mdbook to cache directory
	if: steps.cache-cargo.outputs.cache-hit != 'true'
	run: \|
	mkdir ~/cargo-bin
	cp ~/.cargo/bin/mdbook ~/cargo-bin
	- name: Put new cargo binary directory into path
	run: echo "~/cargo-bin" >> $GITHUB_PATH

	- name: Build book
	run: mdbook build
	- name: Test book
	run: mdbook test
	- name: Check links
	run: linkchecker book

	- name: Deploy book
	if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
	uses: peaceiris/actions-gh-pages@v3
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: book
	force_orphan: true

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