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Editing: Makefile.common

# Copyright 2018 The Prometheus Authors
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# A common Makefile that includes rules to be reused in different prometheus projects.
# !!! Open PRs only against the prometheus/prometheus/Makefile.common repository!

# Example usage :
# Create the main Makefile in the root project directory.
# include Makefile.common
# customTarget:
# 	@echo ">> Running customTarget"
#

# Ensure GOBIN is not set during build so that promu is installed to the correct path
unexport GOBIN

GO           ?= go
GOFMT        ?= $(GO)fmt
FIRST_GOPATH := $(firstword $(subst :, ,$(shell $(GO) env GOPATH)))
GOOPTS       ?=
GOHOSTOS     ?= $(shell $(GO) env GOHOSTOS)
GOHOSTARCH   ?= $(shell $(GO) env GOHOSTARCH)

GO_VERSION        ?= $(shell $(GO) version)
GO_VERSION_NUMBER ?= $(word 3, $(GO_VERSION))
PRE_GO_111        ?= $(shell echo $(GO_VERSION_NUMBER) | grep -E 'go1\.(10|[0-9])\.')

PROMU        := $(FIRST_GOPATH)/bin/promu
pkgs          = ./...

ifeq (arm, $(GOHOSTARCH))
	GOHOSTARM ?= $(shell GOARM= $(GO) env GOARM)
	GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH)v$(GOHOSTARM)
else
	GO_BUILD_PLATFORM ?= $(GOHOSTOS)-$(GOHOSTARCH)
endif

GOTEST := $(GO) test
GOTEST_DIR :=
ifneq ($(CIRCLE_JOB),)
ifneq ($(shell which gotestsum),)
	GOTEST_DIR := test-results
	GOTEST := gotestsum --junitfile $(GOTEST_DIR)/unit-tests.xml --
endif
endif

PROMU_VERSION ?= 0.14.0
PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz

SKIP_GOLANGCI_LINT :=
GOLANGCI_LINT :=
GOLANGCI_LINT_OPTS ?=
GOLANGCI_LINT_VERSION ?= v1.51.2
# golangci-lint only supports linux, darwin and windows platforms on i386/amd64.
# windows isn't included here because of the path separator being different.
ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux darwin))
	ifeq ($(GOHOSTARCH),$(filter $(GOHOSTARCH),amd64 i386))
		# If we're in CI and there is an Actions file, that means the linter
		# is being run in Actions, so we don't need to run it here.
		ifneq (,$(SKIP_GOLANGCI_LINT))
			GOLANGCI_LINT :=
		else ifeq (,$(CIRCLE_JOB))
			GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint
		else ifeq (,$(wildcard .github/workflows/golangci-lint.yml))
			GOLANGCI_LINT := $(FIRST_GOPATH)/bin/golangci-lint
		endif
	endif
endif

PREFIX                  ?= $(shell pwd)
BIN_DIR                 ?= $(shell pwd)
DOCKER_IMAGE_TAG        ?= $(subst /,-,$(shell git rev-parse --abbrev-ref HEAD))
DOCKERFILE_PATH         ?= ./Dockerfile
DOCKERBUILD_CONTEXT     ?= ./
DOCKER_REPO             ?= prom

DOCKER_ARCHS            ?= amd64

BUILD_DOCKER_ARCHS = $(addprefix common-docker-,$(DOCKER_ARCHS))
PUBLISH_DOCKER_ARCHS = $(addprefix common-docker-publish-,$(DOCKER_ARCHS))
TAG_DOCKER_ARCHS = $(addprefix common-docker-tag-latest-,$(DOCKER_ARCHS))

SANITIZED_DOCKER_IMAGE_TAG := $(subst +,-,$(DOCKER_IMAGE_TAG))

ifeq ($(GOHOSTARCH),amd64)
        ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux freebsd darwin windows))
                # Only supported on amd64
                test-flags := -race
        endif
endif

# This rule is used to forward a target like "build" to "common-build".  This
# allows a new "build" target to be defined in a Makefile which includes this
# one and override "common-build" without override warnings.
%: common-% ;

.PHONY: common-all
common-all: precheck style check_license lint yamllint unused build test

.PHONY: common-style
common-style:
	@echo ">> checking code style"
	@fmtRes=$$($(GOFMT) -d $$(find . -path ./vendor -prune -o -name '*.go' -print)); \
	if [ -n "$${fmtRes}" ]; then \
		echo "gofmt checking failed!"; echo "$${fmtRes}"; echo; \
		echo "Please ensure you are using $$($(GO) version) for formatting code."; \
		exit 1; \
	fi

.PHONY: common-check_license
common-check_license:
	@echo ">> checking license header"
	@licRes=$$(for file in $$(find . -type f -iname '*.go' ! -path './vendor/*') ; do \
               awk 'NR<=3' $$file | grep -Eq "(Copyright|generated|GENERATED)" || echo $$file; \
       done); \
       if [ -n "$${licRes}" ]; then \
               echo "license header checking failed:"; echo "$${licRes}"; \
               exit 1; \
       fi

.PHONY: common-deps
common-deps:
	@echo ">> getting dependencies"
	$(GO) mod download

.PHONY: update-go-deps
update-go-deps:
	@echo ">> updating Go dependencies"
	@for m in $$($(GO) list -mod=readonly -m -f '{{ if and (not .Indirect) (not .Main)}}{{.Path}}{{end}}' all); do \
		$(GO) get -d $$m; \
	done
	$(GO) mod tidy

.PHONY: common-test-short
common-test-short: $(GOTEST_DIR)
	@echo ">> running short tests"
	$(GOTEST) -short $(GOOPTS) $(pkgs)

.PHONY: common-test
common-test: $(GOTEST_DIR)
	@echo ">> running all tests"
	$(GOTEST) $(test-flags) $(GOOPTS) $(pkgs)

$(GOTEST_DIR):
	@mkdir -p $@

.PHONY: common-format
common-format:
	@echo ">> formatting code"
	$(GO) fmt $(pkgs)

.PHONY: common-vet
common-vet:
	@echo ">> vetting code"
	$(GO) vet $(GOOPTS) $(pkgs)

.PHONY: common-lint
common-lint: $(GOLANGCI_LINT)
ifdef GOLANGCI_LINT
	@echo ">> running golangci-lint"
# 'go list' needs to be executed before staticcheck to prepopulate the modules cache.
# Otherwise staticcheck might fail randomly for some reason not yet explained.
	$(GO) list -e -compiled -test=true -export=false -deps=true -find=false -tags= -- ./... > /dev/null
	$(GOLANGCI_LINT) run $(GOLANGCI_LINT_OPTS) $(pkgs)
endif

.PHONY: common-yamllint
common-yamllint:
	@echo ">> running yamllint on all YAML files in the repository"
ifeq (, $(shell which yamllint))
	@echo "yamllint not installed so skipping"
else
	yamllint .
endif

# For backward-compatibility.
.PHONY: common-staticcheck
common-staticcheck: lint

.PHONY: common-unused
common-unused:
	@echo ">> running check for unused/missing packages in go.mod"
	$(GO) mod tidy
	@git diff --exit-code -- go.sum go.mod

.PHONY: common-build
common-build: promu
	@echo ">> building binaries"
	$(PROMU) build --prefix $(PREFIX) $(PROMU_BINARIES)

.PHONY: common-tarball
common-tarball: promu
	@echo ">> building release tarball"
	$(PROMU) tarball --prefix $(PREFIX) $(BIN_DIR)

.PHONY: common-docker $(BUILD_DOCKER_ARCHS)
common-docker: $(BUILD_DOCKER_ARCHS)
$(BUILD_DOCKER_ARCHS): common-docker-%:
	docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" \
		-f $(DOCKERFILE_PATH) \
		--build-arg ARCH="$*" \
		--build-arg OS="linux" \
		$(DOCKERBUILD_CONTEXT)

.PHONY: common-docker-publish $(PUBLISH_DOCKER_ARCHS)
common-docker-publish: $(PUBLISH_DOCKER_ARCHS)
$(PUBLISH_DOCKER_ARCHS): common-docker-publish-%:
	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)"

DOCKER_MAJOR_VERSION_TAG = $(firstword $(subst ., ,$(shell cat VERSION)))
.PHONY: common-docker-tag-latest $(TAG_DOCKER_ARCHS)
common-docker-tag-latest: $(TAG_DOCKER_ARCHS)
$(TAG_DOCKER_ARCHS): common-docker-tag-latest-%:
	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest"
	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)"

.PHONY: common-docker-manifest
common-docker-manifest:
	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(SANITIZED_DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(SANITIZED_DOCKER_IMAGE_TAG))
	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(SANITIZED_DOCKER_IMAGE_TAG)"

.PHONY: promu
promu: $(PROMU)

$(PROMU):
	$(eval PROMU_TMP := $(shell mktemp -d))
	curl -s -L $(PROMU_URL) | tar -xvzf - -C $(PROMU_TMP)
	mkdir -p $(FIRST_GOPATH)/bin
	cp $(PROMU_TMP)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM)/promu $(FIRST_GOPATH)/bin/promu
	rm -r $(PROMU_TMP)

.PHONY: proto
proto:
	@echo ">> generating code from proto files"
	@./scripts/genproto.sh

ifdef GOLANGCI_LINT
$(GOLANGCI_LINT):
	mkdir -p $(FIRST_GOPATH)/bin
	curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/$(GOLANGCI_LINT_VERSION)/install.sh \
		| sed -e '/install -d/d' \
		| sh -s -- -b $(FIRST_GOPATH)/bin $(GOLANGCI_LINT_VERSION)
endif

.PHONY: precheck
precheck::

define PRECHECK_COMMAND_template =
precheck:: $(1)_precheck

PRECHECK_COMMAND_$(1) ?= $(1) $$(strip $$(PRECHECK_OPTIONS_$(1)))
.PHONY: $(1)_precheck
$(1)_precheck:
	@if ! $$(PRECHECK_COMMAND_$(1)) 1>/dev/null 2>&1; then \
		echo "Execution of '$$(PRECHECK_COMMAND_$(1))' command failed. Is $(1) installed?"; \
		exit 1; \
	fi
endef

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