Makefile

# Setting SHELL to bash allows bash commands to be executed by recipes.
# This is a requirement for 'setup-envtest.sh' in the test target.
# Options are set to exit when a recipe line exits non-zero or a piped command fails.
SHELL = /usr/bin/env bash -o pipefail
.SHELLFLAGS = -ec

# 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

# Tools for deploy
KUBECTL?=kubectl
PWD=$(shell pwd)
KUSTOMIZE?=$(PWD)/$(PERMANENT_TMP_GOPATH)/bin/kustomize
KUSTOMIZE_VERSION?=v3.5.4
KUSTOMIZE_ARCHIVE_NAME?=kustomize_$(KUSTOMIZE_VERSION)_$(GOHOSTOS)_$(GOHOSTARCH).tar.gz
kustomize_dir:=$(dir $(KUSTOMIZE))

IMAGE = quay.io/morvencao/sidecar-injector:latest

all: build
.PHONY: all

##@ General

# The help target prints out all targets with their descriptions organized
# beneath their categories. The categories are represented by '##@' and the
# target descriptions by '##'. The awk commands is responsible for reading the
# entire set of makefiles included in this invocation, looking for lines of the
# file as xyz: ## something, and then pretty-format the target and help. Then,
# if there's a line with ##@ something, that gets pretty-printed as a category.
# More info on the usage of ANSI control characters for terminal formatting:
# https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_parameters
# More info on the awk command:
# http://linuxcommand.org/lc3_adv_awk.php

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

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

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

##@ Build

.PHONY: build
build: fmt vet ## Build binary.
	go build -o bin/sidecar-injector ./cmd/

.PHONY: docker-build
docker-build: test ## Build docker image.
	docker build -t ${IMAGE} .

.PHONY: docker-push
docker-push: ## Push docker image.
	docker push ${IMAGE}

##@ Deployment

deploy: kustomize
	cp deploy/kustomization.yaml deploy/kustomization.yaml.tmp
	cd deploy && $(KUSTOMIZE) edit set image sidecar-injector=$(IMAGE)
	$(KUSTOMIZE) build deploy | $(KUBECTL) apply -f -
	mv deploy/kustomization.yaml.tmp deploy/kustomization.yaml

undeploy: kustomize
	$(KUSTOMIZE) build deploy | $(KUBECTL) delete --ignore-not-found -f -

KUSTOMIZE = $(shell pwd)/bin/kustomize
.PHONY: kustomize
kustomize: ## Download kustomize locally if necessary.
	$(call go-get-tool,$(KUSTOMIZE),sigs.k8s.io/kustomize/kustomize/v3@v3.8.7)

# go-get-tool will 'go get' any package $2 and install it to $1.
PROJECT_DIR := $(shell dirname $(abspath $(lastword $(MAKEFILE_LIST))))
define go-get-tool
@[ -f $(1) ] || { \
set -e ;\
TMP_DIR=$$(mktemp -d) ;\
cd $$TMP_DIR ;\
go mod init tmp ;\
echo "Downloading $(2)" ;\
GOBIN=$(PROJECT_DIR)/bin go get $(2) ;\
rm -rf $$TMP_DIR ;\
}
endef