# Image URL to use all building/pushing image targets
IMG ?= fluxcd/source-controller
TAG ?= latest

# Base image used to build the Go binary
LIBGIT2_IMG ?= ghcr.io/fluxcd/golang-with-libgit2
LIBGIT2_TAG ?= libgit2-1.1.1-1

# Allows for defining additional Docker buildx arguments,
# e.g. '--push'.
BUILD_ARGS ?=
# Architectures to build images for
BUILD_PLATFORMS ?= linux/amd64,linux/arm64,linux/arm/v7

# Produce CRDs that work back to Kubernetes 1.16
CRD_OPTIONS ?= crd:crdVersions=v1

# Repository root based on Git metadata
REPOSITORY_ROOT := $(shell git rev-parse --show-toplevel)

# Libgit2 version
LIBGIT2_VERSION ?= 1.1.1

# Other dependency versions
ENVTEST_BIN_VERSION ?= 1.19.2
KUBEBUILDER_ASSETS ?= $(shell $(SETUP_ENVTEST) use -i $(ENVTEST_BIN_VERSION) -p path)

# libgit2 related magical paths
# These are used to determine if the target libgit2 version is already available on
# the system, or where they should be installed to
SYSTEM_LIBGIT2_VERSION := $(shell pkg-config --modversion libgit2 2>/dev/null)
LIBGIT2_PATH := $(REPOSITORY_ROOT)/hack/libgit2
LIBGIT2_LIB_PATH := $(LIBGIT2_PATH)/lib
LIBGIT2 := $(LIBGIT2_LIB_PATH)/libgit2.so.$(LIBGIT2_VERSION)

ifneq ($(LIBGIT2_VERSION),$(SYSTEM_LIBGIT2_VERSION))
	LIBGIT2_FORCE ?= 1
endif

ifeq ($(shell uname -s),Darwin)
	LIBGIT2 := $(LIBGIT2_LIB_PATH)/libgit2.$(LIBGIT2_VERSION).dylib
endif

# API (doc) generation utilities
CONTROLLER_GEN_VERSION ?= v0.5.0
GEN_API_REF_DOCS_VERSION ?= v0.3.0

# 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

all: build

build: $(LIBGIT2) ## Build manager binary
	PKG_CONFIG_PATH=$(LIBGIT2_LIB_PATH)/pkgconfig/ \
	go build -o bin/manager main.go

test: $(LIBGIT2) test-api  ## Run tests
	LD_LIBRARY_PATH=$(LIBGIT2_LIB_PATH) \
	PKG_CONFIG_PATH=$(LIBGIT2_LIB_PATH)/pkgconfig/ \
	go test ./... -coverprofile cover.out

test-api: ## Run api tests
	cd api; go test ./... -coverprofile cover.out

run: $(LIBGIT2) generate fmt vet manifests  ## Run against the configured Kubernetes cluster in ~/.kube/config
	LD_LIBRARY_PATH=$(LIBGIT2_LIB_PATH) \
	go run ./main.go

install: manifests  ## Install CRDs into a cluster
	kustomize build config/crd | kubectl apply -f -

uninstall: manifests  ## Uninstall CRDs from a cluster
	kustomize build config/crd | kubectl delete -f -

deploy: manifests  ## Deploy controller in the configured Kubernetes cluster in ~/.kube/config
	cd config/manager && kustomize edit set image fluxcd/source-controller=$(IMG):$(TAG)
	kustomize build config/default | kubectl apply -f -

dev-deploy:  ## Deploy controller dev image in the configured Kubernetes cluster in ~/.kube/config
	mkdir -p config/dev && cp config/default/* config/dev
	cd config/dev && kustomize edit set image fluxcd/source-controller=$(IMG):$(TAG)
	kustomize build config/dev | kubectl apply -f -
	rm -rf config/dev

manifests: controller-gen  ## Generate manifests, e.g. CRD, RBAC, etc.
	$(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role paths="./..." output:crd:artifacts:config="config/crd/bases"
	cd api; $(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role paths="./..." output:crd:artifacts:config="../config/crd/bases"

api-docs: gen-crd-api-reference-docs  ## Generate API reference documentation
	$(API_REF_GEN) -api-dir=./api/v1beta1 -config=./hack/api-docs/config.json -template-dir=./hack/api-docs/template -out-file=./docs/api/source.md

tidy:  ## Run go mod tidy
	go mod tidy
	cd api; go mod tidy

fmt:  ## Run go fmt against code
	go fmt ./...
	cd api; go fmt ./...

vet: $(LIBGIT2)	## Run go vet against code
	PKG_CONFIG_PATH=$(LIBGIT2_LIB_PATH)/pkgconfig \
	go vet ./...
	cd api; go vet ./...

generate: controller-gen  ## Generate API code
	cd api; $(CONTROLLER_GEN) object:headerFile="../hack/boilerplate.go.txt" paths="./..."

docker-build:  ## Build the Docker image
	docker buildx build \
		--build-arg LIBGIT2_IMG=$(LIBGIT2_IMG) \
		--build-arg LIBGIT2_TAG=$(LIBGIT2_TAG) \
		--platform=$(BUILD_PLATFORMS) \
		-t $(IMG):$(TAG) \
		$(BUILD_ARGS) .

docker-push:  ## Push Docker image
	docker push $(IMG):$(TAG)

controller-gen: ## Find or download controller-gen
ifeq (, $(shell which controller-gen))
	@{ \
	set -e; \
	CONTROLLER_GEN_TMP_DIR=$$(mktemp -d); \
	cd $$CONTROLLER_GEN_TMP_DIR; \
	go mod init tmp; \
	go get sigs.k8s.io/controller-tools/cmd/controller-gen@$(CONTROLLER_GEN_VERSION); \
	rm -rf $$CONTROLLER_GEN_TMP_DIR; \
	}
CONTROLLER_GEN=$(GOBIN)/controller-gen
else
CONTROLLER_GEN=$(shell which controller-gen)
endif

gen-crd-api-reference-docs:  ## Find or download gen-crd-api-reference-docs
ifeq (, $(shell which gen-crd-api-reference-docs))
	@{ \
	set -e; \
	API_REF_GEN_TMP_DIR=$$(mktemp -d); \
	cd $$API_REF_GEN_TMP_DIR; \
	go mod init tmp; \
	go get github.com/ahmetb/gen-crd-api-reference-docs@$(GEN_API_REF_DOCS_VERSION); \
	rm -rf $$API_REF_GEN_TMP_DIR; \
	}
API_REF_GEN=$(GOBIN)/gen-crd-api-reference-docs
else
API_REF_GEN=$(shell which gen-crd-api-reference-docs)
endif

setup-envtest:  ## Find or download setup-envtest
ifeq (, $(shell which setup-envtest))
	@{ \
	set -e; \
	SETUP_ENVTEST_TMP_DIR=$$(mktemp -d); \
	cd $$SETUP_ENVTEST_TMP_DIR; \
	go mod init tmp; \
	go get sigs.k8s.io/controller-runtime/tools/setup-envtest@latest; \
	rm -rf $$SETUP_ENVTEST_TMP_DIR; \
	}
SETUP_ENVTEST=$(GOBIN)/setup-envtest
else
SETUP_ENVTEST=$(shell which setup-envtest)
endif

libgit2: $(LIBGIT2)  ## Detect or download libgit2 library

$(LIBGIT2):
ifeq (1, $(LIBGIT2_FORCE))
	@{ \
	set -e; \
	mkdir -p $(LIBGIT2_PATH); \
	curl -sL https://raw.githubusercontent.com/fluxcd/golang-with-libgit2/$(LIBGIT2_TAG)/hack/Makefile -o $(LIBGIT2_PATH)/Makefile; \
	INSTALL_PREFIX=$(LIBGIT2_PATH) make -C $(LIBGIT2_PATH) libgit2; \
	}
endif

.PHONY: help
help:  ## Display this help menu
	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-20s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)