SHELL=/bin/bash -o pipefail

REPO?=quay.io/coreos/prometheus-operator
TAG?=$(shell git rev-parse --short HEAD)

PO_CRDGEN_BINARY:=$(GOPATH)/bin/po-crdgen
OPENAPI_GEN_BINARY:=$(GOPATH)/bin/openapi-gen
DEEPCOPY_GEN_BINARY:=$(GOPATH)/bin/deepcopy-gen
GOJSONTOYAML_BINARY:=$(GOPATH)/bin/gojsontoyaml
JB_BINARY:=$(GOPATH)/bin/jb
PO_DOCGEN_BINARY:=$(GOPATH)/bin/po-docgen
EMBEDMD_BINARY:=$(GOPATH)/bin/embedmd

GOLANG_FILES:=$(shell find . -name \*.go -print)
pkgs = $(shell go list ./... | grep -v /vendor/ | grep -v /test/)


.PHONY: all
all: format generate build test


############
# Building #
############

.PHONY: build
build: operator prometheus-config-reloader

operator: $(GOLANG_FILES)
	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o $@ cmd/operator/main.go

prometheus-config-reloader:
	GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o $@ cmd/$@/main.go

pkg/client/monitoring/v1/zz_generated.deepcopy.go: $(DEEPCOPY_GEN_BINARY)
	$(DEEPCOPY_GEN_BINARY) \
	-i github.com/coreos/prometheus-operator/pkg/client/monitoring/v1 \
	--go-header-file="$(GOPATH)/src/github.com/coreos/prometheus-operator/.header" \
	-v=4 \
	--logtostderr \
	--bounding-dirs "github.com/coreos/prometheus-operator/pkg/client" \
	--output-file-base zz_generated.deepcopy

pkg/client/monitoring/v1alpha1/zz_generated.deepcopy.go: $(DEEPCOPY_GEN_BINARY)
	$(DEEPCOPY_GEN_BINARY) \
	-i github.com/coreos/prometheus-operator/pkg/client/monitoring/v1alpha1 \
	--go-header-file="$(GOPATH)/src/github.com/coreos/prometheus-operator/.header" \
	-v=4 \
	--logtostderr \
	--bounding-dirs "github.com/coreos/prometheus-operator/pkg/client" \
	--output-file-base zz_generated.deepcopy

.PHONY: image
image: hack/operator-image hack/prometheus-config-reloader-image

hack/operator-image: Dockerfile operator
# Create empty target file, for the sole purpose of recording when this target
# was last executed via the last-modification timestamp on the file. See
# https://www.gnu.org/software/make/manual/make.html#Empty-Targets
	docker build -t $(REPO):$(TAG) .
	touch $@

hack/prometheus-config-reloader-image: cmd/prometheus-config-reloader/Dockerfile prometheus-config-reloader
# Create empty target file, for the sole purpose of recording when this target
# was last executed via the last-modification timestamp on the file. See
# https://www.gnu.org/software/make/manual/make.html#Empty-Targets
	docker build -t quay.io/coreos/prometheus-config-reloader:$(TAG) -f cmd/prometheus-config-reloader/Dockerfile .
	touch $@


##############
# Generating #
##############

.PHONY: generate
generate: Documentation/*

.PHONY: generate-in-docker
generate-in-docker: hack/jsonnet-docker-image
	docker run \
	--rm \
	-u=$(shell id -u $(USER)):$(shell id -g $(USER)) \
	-v `pwd`:/go/src/github.com/coreos/prometheus-operator \
	po-jsonnet make generate

.PHONY: kube-prometheus
kube-prometheus:
	cd contrib/kube-prometheus; $(MAKE) generate

example/prometheus-operator-crd/**.crd.yaml: pkg/client/monitoring/v1/openapi_generated.go $(PO_CRDGEN_BINARY)
	po-crdgen prometheus > example/prometheus-operator-crd/prometheus.crd.yaml
	po-crdgen alertmanager > example/prometheus-operator-crd/alertmanager.crd.yaml
	po-crdgen servicemonitor > example/prometheus-operator-crd/servicemonitor.crd.yaml
	po-crdgen prometheusrule > example/prometheus-operator-crd/prometheusrule.crd.yaml

jsonnet/prometheus-operator/**-crd.libsonnet: example/prometheus-operator-crd/**.crd.yaml $(GOJSONTOYAML_BINARY)
	cat example/prometheus-operator-crd/alertmanager.crd.yaml   | gojsontoyaml -yamltojson > jsonnet/prometheus-operator/alertmanager-crd.libsonnet
	cat example/prometheus-operator-crd/prometheus.crd.yaml     | gojsontoyaml -yamltojson > jsonnet/prometheus-operator/prometheus-crd.libsonnet
	cat example/prometheus-operator-crd/servicemonitor.crd.yaml | gojsontoyaml -yamltojson > jsonnet/prometheus-operator/servicemonitor-crd.libsonnet
	cat example/prometheus-operator-crd/prometheusrule.crd.yaml | gojsontoyaml -yamltojson > jsonnet/prometheus-operator/prometheusrule-crd.libsonnet

pkg/client/monitoring/v1/openapi_generated.go: $(OPENAPI_GEN_BINARY)
	$(OPENAPI_GEN_BINARY) \
	-i github.com/coreos/prometheus-operator/pkg/client/monitoring/v1,k8s.io/apimachinery/pkg/apis/meta/v1,k8s.io/api/core/v1 \
	-p github.com/coreos/prometheus-operator/pkg/client/monitoring/v1 \
	--go-header-file="$(GOPATH)/src/github.com/coreos/prometheus-operator/.header"

bundle.yaml: example/rbac/prometheus-operator/*.yaml
	hack/generate-bundle.sh

hack/generate/vendor: $(JB_BINARY) jsonnet/prometheus-operator/**
	cd hack/generate; $(JB_BINARY) install;

example/non-rbac/prometheus-operator.yaml: hack/generate/vendor hack/generate/prometheus-operator-non-rbac.jsonnet
	hack/generate/build-non-rbac-prometheus-operator.sh

example/rbac/prometheus-operator/*.yaml: hack/generate/vendor hack/generate/prometheus-operator-rbac.jsonnet
	hack/generate/build-rbac-prometheus-operator.sh

jsonnet/prometheus-operator/prometheus-operator.libsonnet: VERSION
	sed -i                                                            \
		"s/prometheusOperator: 'v.*',/prometheusOperator: 'v$(shell cat VERSION)',/" \
		jsonnet/prometheus-operator/prometheus-operator.libsonnet;

FULLY_GENERATED_DOCS = Documentation/api.md Documentation/compatibility.md
TO_BE_EXTENDED_DOCS = $(filter-out $(FULLY_GENERATED_DOCS), $(wildcard Documentation/*.md))

Documentation/api.md: $(PO_DOCGEN_BINARY) pkg/client/monitoring/v1/types.go
	$(PO_DOCGEN_BINARY) api pkg/client/monitoring/v1/types.go > $@

Documentation/compatibility.md: $(PO_DOCGEN_BINARY) pkg/prometheus/statefulset.go
	$(PO_DOCGEN_BINARY) compatibility > $@

$(TO_BE_EXTENDED_DOCS): $(EMBEDMD_BINARY) $(shell find example) kube-prometheus
	$(EMBEDMD_BINARY) -w `find Documentation -name "*.md" | grep -v vendor`


##############
# Formatting #
##############

.PHONY: format
format: go-fmt check-license

.PHONY: go-fmt
go-fmt:
	go fmt $(pkgs)

.PHONY: check-license
check-license:
	./scripts/check_license.sh


###########
# Testing #
###########

.PHONY: test
test: test-unit test-e2e

.PHONY: test-unit
test-unit:
	@go test $(TEST_RUN_ARGS) -short $(pkgs)

.PHONY: test-e2e
test-e2e: NAMESPACE?=po-e2e-$(shell LC_ALL=C tr -dc a-z0-9 < /dev/urandom | head -c 13 ; echo '')
test-e2e: KUBECONFIG?=$(HOME)/.kube/config
test-e2e:
	go test -timeout 55m -v ./test/e2e/ $(TEST_RUN_ARGS) --kubeconfig=$(KUBECONFIG) --operator-image=$(REPO):$(TAG) --namespace=$(NAMESPACE)

.PHONY: test-e2e-helm
test-e2e-helm:
	./helm/hack/e2e-test.sh
	# package the chart and verify if they have the version bumped
	helm/hack/helm-package.sh "alertmanager grafana prometheus prometheus-operator exporter-kube-dns exporter-kube-scheduler exporter-kubelets exporter-node exporter-kube-controller-manager exporter-kube-etcd exporter-kube-state exporter-kubernetes exporter-coredns"
	helm/hack/sync-repo.sh false


########
# Misc #
########

hack/jsonnet-docker-image: scripts/jsonnet/Dockerfile
	docker build -f scripts/jsonnet/Dockerfile -t po-jsonnet .
	touch $@

.PHONY: helm-sync-s3
helm-sync-s3:
	helm/hack/helm-package.sh "alertmanager grafana prometheus prometheus-operator exporter-kube-dns exporter-kube-scheduler exporter-kubelets exporter-node exporter-kube-controller-manager exporter-kube-etcd exporter-kube-state exporter-kubernetes exporter-coredns"
	helm/hack/sync-repo.sh true
	helm/hack/helm-package.sh kube-prometheus
	helm/hack/sync-repo.sh true


############
# Binaries #
############

$(EMBEDMD_BINARY):
	@go get github.com/campoy/embedmd

$(JB_BINARY):
	go get -u github.com/jsonnet-bundler/jsonnet-bundler/cmd/jb

$(PO_CRDGEN_BINARY): cmd/po-crdgen/**.go
	go install github.com/coreos/prometheus-operator/cmd/po-crdgen

$(PO_DOCGEN_BINARY): cmd/po-docgen/**.go
	go install github.com/coreos/prometheus-operator/cmd/po-docgen

$(OPENAPI_GEN_BINARY):
	go get -u -v -d k8s.io/code-generator/cmd/openapi-gen
	cd $(GOPATH)/src/k8s.io/code-generator; git checkout release-1.10
	go install k8s.io/code-generator/cmd/openapi-gen

$(DEEPCOPY_GEN_BINARY):
	go get -u -v -d k8s.io/code-generator/cmd/deepcopy-gen
	cd $(GOPATH)/src/k8s.io/code-generator; git checkout release-1.10
	go install k8s.io/code-generator/cmd/deepcopy-gen

$(GOJSONTOYAML_BINARY):
	go get -u github.com/brancz/gojsontoyaml