chore: add Mac and homebrew to CI #72

	on:
	push:
	pull_request:

	name: CI

	jobs:
	build:
	strategy:
	matrix:
	toolchain:
	- "4.3.0"
	- "4.4.0"
	- "4.5.0"
	- "4.6.0"
	- "4.7.0"
	- "nightly-2024-04-07"
	platform:
	- os: ubuntu-latest
	installer: \|
	curl https://raw.githubusercontent.com/leanprover/elan/master/elan-init.sh -sSf \| sh -s -- -y --default-toolchain none
	- os: macos-latest
	installer: \|
	curl https://raw.githubusercontent.com/leanprover/elan/master/elan-init.sh -sSf \| sh -s -- -y --default-toolchain none
	- os: macos-latest
	installer: \|
	brew install elan-init
	name: Build and test (${{ matrix.platform.os }}, ${{ matrix.platform.installer}}, ${{ matrix.toolchain}})
	runs-on: ${{ matrix.platform.os }}
	steps:
	- name: Install elan
	run: \|
	set -o pipefail
	${{ matrix.platform.installer }}
	echo "$HOME/.elan/bin" >> $GITHUB_PATH

	- name: Which lake?
	run: \|
	which lake

	- uses: actions/checkout@v3

	- name: List all files
	run: \|
	find . -name "*.lean" -type f

	- name: Select Lean version
	run: \|
	echo "leanprover/lean4:${{ matrix.toolchain }}" > lean-toolchain

	- name: Lean version
	run: \|
	lean --version

	- name: Cache .lake
	uses: actions/cache@v3
	with:
	path: .lake
	key: ${{ runner.os }}-${{ hashFiles('lake-manifest.json') }}-${{ hashFiles('lean-toolchain') }}

	- name: Build the project
	run: \|
	lake build

	- name: Configure demo/test subproject
	run: \|
	pushd demo
	lake update
	lake build :examples
	popd

	- name: Run tests
	run: \|
	lake exe subverso-tests

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