Makefile

# Image URL to use all building/pushing image targets
IMG ?= budstudio/scaler:latest

# Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
ifeq (,$(shell go env GOBIN))
GOBIN=$(shell go env GOPATH)/bin
else
GOBIN=$(shell go env GOBIN)
endif

# CONTAINER_TOOL defines the container tool to be used for building images.
CONTAINER_TOOL ?= docker

# Setting SHELL to bash allows bash commands to be executed by recipes.
SHELL = /usr/bin/env bash -o pipefail
.SHELLFLAGS = -ec

.PHONY: all
all: build

##@ General

.PHONY: help
help: ## Display this help.
	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)

##@ Development

.PHONY: manifests
manifests: controller-gen ## Generate WebhookConfiguration, ClusterRole and CustomResourceDefinition objects.
	$(CONTROLLER_GEN) rbac:roleName=budaiscaler-role crd webhook paths="./..." output:crd:artifacts:config=config/crd output:rbac:artifacts:config=config/rbac

.PHONY: generate
generate: controller-gen ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
	$(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./..."

.PHONY: fmt
fmt: ## Run go fmt against code.
	go fmt ./...

.PHONY: vet
vet: ## Run go vet against code.
	go vet ./...

.PHONY: test
test: manifests generate fmt vet ## Run tests.
	go test ./... -coverprofile cover.out

.PHONY: lint
lint: golangci-lint ## Run golangci-lint linter
	$(GOLANGCI_LINT) run

##@ Build

.PHONY: build
build: manifests generate fmt vet ## Build manager binary.
	go build -o bin/controller ./cmd/controller

.PHONY: run
run: manifests generate fmt vet ## Run a controller from your host.
	go run ./cmd/controller/main.go

.PHONY: docker-build
docker-build: ## Build docker image with the manager.
	$(CONTAINER_TOOL) build -t ${IMG} .

.PHONY: docker-push
docker-push: ## Push docker image with the manager.
	$(CONTAINER_TOOL) push ${IMG}

##@ Deployment

ifndef ignore-not-found
  ignore-not-found = false
endif

.PHONY: install
install: manifests ## Install CRDs into the K8s cluster specified in ~/.kube/config.
	kubectl apply -f config/crd/

.PHONY: uninstall
uninstall: manifests ## Uninstall CRDs from the K8s cluster specified in ~/.kube/config.
	kubectl delete --ignore-not-found=$(ignore-not-found) -f config/crd/

.PHONY: deploy
deploy: manifests ## Deploy controller to the K8s cluster specified in ~/.kube/config.
	kubectl apply -f config/rbac/
	kubectl apply -f config/manager/

.PHONY: undeploy
undeploy: ## Undeploy controller from the K8s cluster specified in ~/.kube/config.
	kubectl delete --ignore-not-found=$(ignore-not-found) -f config/manager/
	kubectl delete --ignore-not-found=$(ignore-not-found) -f config/rbac/

##@ Dependencies

## Location to install dependencies to
LOCALBIN ?= $(shell pwd)/bin
$(LOCALBIN):
	mkdir -p $(LOCALBIN)

## Tool Binaries
CONTROLLER_GEN ?= $(LOCALBIN)/controller-gen
GOLANGCI_LINT ?= $(LOCALBIN)/golangci-lint

## Tool Versions
CONTROLLER_TOOLS_VERSION ?= v0.16.1
GOLANGCI_LINT_VERSION ?= v1.59.1

.PHONY: controller-gen
controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessary.
$(CONTROLLER_GEN): $(LOCALBIN)
	$(call go-install-tool,$(CONTROLLER_GEN),sigs.k8s.io/controller-tools/cmd/controller-gen,$(CONTROLLER_TOOLS_VERSION))

.PHONY: golangci-lint
golangci-lint: $(GOLANGCI_LINT) ## Download golangci-lint locally if necessary.
$(GOLANGCI_LINT): $(LOCALBIN)
	$(call go-install-tool,$(GOLANGCI_LINT),github.com/golangci/golangci-lint/cmd/golangci-lint,$(GOLANGCI_LINT_VERSION))

# go-install-tool will 'go install' any package with custom target and target-version.
define go-install-tool
@[ -f $(1) ] || { \
set -e; \
package=$(2)@$(3) ;\
echo "Installing $${package}" ;\
GOBIN=$(LOCALBIN) go install $${package} ;\
}
endef