fix: improve golangci-lint caching (#66) #97

	---
	name: Validate Go code formatting

	on: # yamllint disable-line rule:truthy
	push:
	branches: [main, master]
	paths:
	- "**.go"
	- ".github/workflows/format-go.yaml"
	pull_request:
	branches: [main, master]
	paths:
	- "**.go"
	- ".github/workflows/format-go.yaml"


	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:

	validateCodeFormatGo:
	runs-on: ubuntu-latest
	timeout-minutes: 15

	strategy:
	matrix:
	# Without quotes, 1.20 becomes 1.2!
	go-version: ["1.20"]
	steps:
	- name: checkout
	uses: actions/checkout@v4

	- name: Set up Go ${{ matrix.go-version }}
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go-version }}

	# Ref: https://github.com/actions/cache/blob/main/examples.md#go---modules
	# Warning: This is Linux specific
	- uses: actions/cache@v3
	with:
	path: \|
	~/.cache/go-build
	~/go/pkg/mod
	key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
	restore-keys: \|
	${{ runner.os }}-go-

	- name: Validate code formatting
	run: \|
	gofmt -l .
	test -z $(gofmt -l .)

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