build: add go matrix, refactor ci #84

	name: CI

	on:
	push:
	branches: ["main"]
	pull_request:
	branches: ["main"]
	schedule:
	# 08:00 UTC on Saturday.
	- cron: "0 8 * * 6"

	jobs:
	go:
	strategy:
	matrix:
	go: ["1.22"]
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Setup
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go }}

	- name: Test
	run: go test -v ./...

	- name: Format
	run: \|
	gofmt -w -s .
	git diff --exit-code

	- name: Vet
	run: go vet ./...

	- name: Lint
	uses: dominikh/staticcheck-action@v1
	with:
	version: "v0.4.7"
	min-go-version: ${{ matrix.go }}
	install-go: false
	cache-key: ${{ matrix.go }}

	python:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Format
	uses: chartboost/ruff-action@v1
	with:
	args: "format --check"

	- name: Lint
	uses: chartboost/ruff-action@v1

	other:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.12"

	- name: Setup Go
	uses: actions/setup-go@v5
	with:
	go-version: "1.22"

	- name: Run extra CI checks
	run: python etc/ci-check.py

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