Update Makefile

Signed-off-by: Yi Chen <[email protected]>

Makefile

@@ -16,6 +16,17 @@ endif
 SHELL = /usr/bin/env bash -o pipefail
 .SHELLFLAGS = -ec
 
+## Location to install binaries
+LOCALBIN ?= $(shell pwd)/bin
+
+## Versions
+HELM_VERSION ?= v3.15.3
+HELM_DOCS_VERSION ?= v1.14.2
+
+## Binaries
+HELM ?= $(LOCALBIN)/helm-$(HELM_VERSION)
+HELM_DOCS ?= $(LOCALBIN)/helm-docs-$(HELM_DOCS_VERSION)
+
 all: build
 
 ##@ General
@@ -99,6 +110,12 @@ docker-build: test ## Build docker image with the manager.
 docker-push: ## Push docker image with the manager.
  docker push ${IMG}
 
+##@ Helm
+
+.PHONY: helm-docs
+helm-docs: helm-docs-plugin ## Generates markdown documentation for helm charts from requirements and values files.
+ $(HELM_DOCS) --sort-values-order=file
+
 ##@ Deployment
 
 install: manifests kustomize ## Install CRDs into the K8s cluster specified in ~/.kube/config.
@@ -114,12 +131,41 @@ deploy: manifests kustomize ## Deploy controller to the K8s cluster specified in
 undeploy: ## Undeploy controller from the K8s cluster specified in ~/.kube/config.
  $(KUSTOMIZE) build manifests/overlays/standalone | kubectl delete -f -
 
+##@ Dependencies
+
 PROJECT_DIR := $(shell dirname $(abspath $(lastword $(MAKEFILE_LIST))))
 
+$(LOCALBIN):
+ mkdir -p $(LOCALBIN)
+
 CONTROLLER_GEN = $(shell pwd)/bin/controller-gen
 controller-gen: ## Download controller-gen locally if necessary.
  GOBIN=$(PROJECT_DIR)/bin go install sigs.k8s.io/controller-tools/cmd/[email protected]
 
 KUSTOMIZE = $(shell pwd)/bin/kustomize
 kustomize: ## Download kustomize locally if necessary.
  GOBIN=$(PROJECT_DIR)/bin go install sigs.k8s.io/kustomize/kustomize/[email protected]
+
+.PHONY: helm
+helm: $(HELM) ## Download helm locally if necessary.
+$(HELM): $(LOCALBIN)
+ $(call go-install-tool,$(HELM),helm.sh/helm/v3/cmd/helm,$(HELM_VERSION))
+
+.PHONY: helm-docs-plugin
+helm-docs-plugin: $(HELM_DOCS) ## Download helm-docs plugin locally if necessary.
+$(HELM_DOCS): $(LOCALBIN)
+ $(call go-install-tool,$(HELM_DOCS),github.com/norwoodj/helm-docs/cmd/helm-docs,$(HELM_DOCS_VERSION))
+
+# go-install-tool will 'go install' any package with custom target and name of binary, if it doesn't exist
+# $1 - target path with name of binary (ideally with version)
+# $2 - package url which can be installed
+# $3 - specific version of package
+define go-install-tool
+@[ -f $(1) ] || { \
+set -e; \
+package=$(2)@$(3) ;\
+echo "Downloading $${package}" ;\
+GOBIN=$(LOCALBIN) go install $${package} ;\
+mv "$$(echo "$(1)" | sed "s/-$(3)$$//")" $(1) ;\
+}
+endef