Bump actions/checkout from 3 to 4 #237

	name: CI

	on: [push, pull_request]

	jobs:
	check:
	name: Check
	runs-on: ubuntu-latest
	# Execute the checks inside the container instead the VM.
	container: golangci/golangci-lint:v1.57.2-alpine
	steps:
	- uses: actions/checkout@v4
	- run: \|
	# We need this go flag because it started to error after golangci-lint is using Go 1.21.
	# TODO(slok): Remove it on next (>1.54.1) golangci-lint upgrade to check if this problem has gone.
	export GOFLAGS="-buildvcs=false"
	./hack/scripts/check.sh

	unit-test:
	name: Unit test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v4
	with:
	go-version-file: go.mod
	- run: make ci-unit-test

	integration-test:
	name: Integration test
	runs-on: ubuntu-latest
	needs: [check, unit-test]
	strategy:
	matrix:
	kubernetes:
	[1.23.17, 1.24.17, 1.25.16, 1.26.14, 1.27.11, 1.28.7, 1.29.2]
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v4
	with:
	go-version-file: go.mod
	- name: Execute tests
	env:
	KIND_VERSION: v0.22.0
	run: \|
	# Get dependencies.
	echo "Getting dependencies..."
	curl -Lo kind https://github.com/kubernetes-sigs/kind/releases/download/${KIND_VERSION}/kind-linux-amd64 && chmod +x kind && sudo mv kind /usr/local/bin/
	curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/v${{ matrix.kubernetes }}/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/

	# Start cluster.
	echo "Executing ${{ matrix.kubernetes }} Kubernetes tests..."
	KUBERNETES_VERSION=${{ matrix.kubernetes }} make ci-integration-test

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