.github: update to Go 1.21 #157

	name: Test & Build
	on:
	push:
	branches:
	- master

	pull_request:

	jobs:
	install-go-modules:
	strategy:
	matrix:
	go: ["1.21.x", "1.20.x", "1.19.x"]

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

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

	- name: Test install Go modules for v${{ matrix.go }}
	run: go install -v . && chamber version

	test:
	strategy:
	matrix:
	go: ["1.21.x", "1.20.x", "1.19.x"]
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

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

	- name: Test
	run: make test

	- name: Check modules are tidy and checked in
	run: \|
	export GO111MODULE=on
	go mod tidy
	if [ "$(git status --porcelain)" != "" ]; then
	echo "git tree is dirty after tidying modules"
	echo "ensure go.mod and go.sum are tidy"
	git status
	exit 1
	fi

	dist:
	strategy:
	matrix:
	go: ["1.21.x", "1.20.x", "1.19.x"]
	runs-on: ubuntu-latest
	needs: test

	steps:
	- uses: actions/checkout@v4

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

	- name: Install nfpm, rpmbuild
	run: sudo make -f Makefile.tools nfpm-debian rpmbuild-debian

	- name: Make distributables
	run: make -f Makefile.release dist
	- uses: actions/upload-artifact@v3
	with:
	name: dist
	path: "dist/*"

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