ci: Refactor CI workflow with build matrix #389

	name: CI

	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	jekyll-build:
	runs-on: ubuntu-latest
	name: Jekyll Build (YJIT_ENABLED ${{ matrix.yjit-enabled }})
	strategy:
	matrix:
	yjit-enabled: [0, 1]
	env:
	RUBY_YJIT_ENABLE: ${{ matrix.yjit-enabled }}
	steps:
	- uses: actions/checkout@v4
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.3
	bundler-cache: true
	- name: Jekyll Build
	run: bundle exec jekyll build

	doc-build-latest:
	runs-on: ubuntu-latest
	name: Rails Doc Build (latest, YJIT_ENABLED ${{ matrix.yjit-enabled }})
	strategy:
	matrix:
	yjit-enabled: [0, 1]
	env:
	RUBY_YJIT_ENABLE: ${{ matrix.yjit-enabled }}
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true
	- name: fetch Rails tags
	run: cd rails && git fetch --depth=1 origin refs/tags/v7:refs/tags/v7
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.3
	bundler-cache: true
	- name: Doc Build
	run: rake build

	doc-build-others:
	runs-on: ubuntu-latest
	name: Rails Doc Build (older versions)
	strategy:
	matrix:
	include:
	- ruby-version: 2.7
	build-rails-versions: "5.2,6.0,6.1"
	- ruby-version: 3.3
	build-rails-versions: "7.0,7.1,7.2"
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true
	- name: fetch Rails tags
	working-directory: rails
	run: \|
	for version in $(echo "${{ matrix.build-rails-versions }}" \| tr ',' ' '); do
	git fetch --depth=1 origin refs/tags/v${version}:refs/tags/v${version}
	done
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby-version }}
	bundler-cache: true
	- name: Doc Build
	run: rake 'build_multi[${{ matrix.build-rails-versions }}]'

Provide feedback