.PHONY: validate verify test test_fancy coverage setup make_necessary_dirs build compile check clean install lint

FIPS_MODE ?= 0
OS := $(shell uname | tr A-Z a-z)
GO_SOURCES := $(shell git ls-files \*.go)
VERSION_STRING := $(shell git describe --match v* 2>/dev/null || awk '$$0="v"$$0' VERSION 2>/dev/null || echo unknown)
DATE_FMT = +%Y%m%d.%H%M%S
ifdef SOURCE_DATE_EPOCH
	BUILD_TIME := $(shell date -u -d "@$(SOURCE_DATE_EPOCH)" "$(DATE_FMT)" 2>/dev/null || date -u -r "$(SOURCE_DATE_EPOCH)" "$(DATE_FMT)" 2>/dev/null || date -u "$(DATE_FMT)")
else
	BUILD_TIME := $(shell date -u "$(DATE_FMT)")
endif
GO_TAGS := tracer_static tracer_static_jaeger continuous_profiler_stackdriver

ARCH ?= $(shell uname -m | sed -e 's/x86_64/amd64/' | sed -e 's/aarch64/arm64/')

GOTESTSUM_VERSION := 1.12.0
GOTESTSUM_FILE := support/bin/gotestsum-${GOTESTSUM_VERSION}

GOLANGCI_LINT_VERSION := 1.64.5
GOLANGCI_LINT_FILE := support/bin/golangci-lint-${GOLANGCI_LINT_VERSION}

export GOFLAGS := -mod=readonly

ifeq (${FIPS_MODE}, 1)
    GO_TAGS += fips

    # If the golang-fips compiler is built with CGO_ENABLED=0, this needs to be
    # explicitly switched on.
    export CGO_ENABLED=1

    # Go 1.19 now requires GOEXPERIMENT=boringcrypto for FIPS compilation.
    # See https://github.com/golang/go/issues/51940 for more details.
    BORINGCRYPTO_SUPPORT := $(shell GOEXPERIMENT=boringcrypto go version > /dev/null 2>&1; echo $$?)
    ifeq ($(BORINGCRYPTO_SUPPORT), 0)
        export GOEXPERIMENT=boringcrypto
    endif
endif

ifneq (${CGO_ENABLED}, 0)
	GO_TAGS += gssapi
endif

ifeq (${OS}, darwin) # Mac OS
    BREW_PREFIX := $(shell brew --prefix 2>/dev/null || echo "/opt/homebrew")

    # To be able to compile gssapi library
    export CGO_CFLAGS="-I$(BREW_PREFIX)/opt/heimdal/include"
endif

GOBUILD_FLAGS := -ldflags "-X main.Version=$(VERSION_STRING) -X main.BuildTime=$(BUILD_TIME)" -tags "$(GO_TAGS)" -mod=mod

PREFIX ?= /usr/local

build: compile

validate: verify test

verify: 
	gofmt -s -l $(GO_SOURCES) | awk '{ print } END { if (NR > 0) { print "Please run make fmt"; exit 1 } }'

fmt:
	gofmt -w -s $(GO_SOURCES)

test: 
	go test -cover -coverprofile=cover.out -count 1 -tags "$(GO_TAGS)" ./...

test_fancy: ${GOTESTSUM_FILE}
	@${GOTESTSUM_FILE} --version
	@${GOTESTSUM_FILE} --junitfile ./cover.xml --format pkgname -- -coverprofile=./cover.out -covermode=atomic -timeout 1m -count 1 -tags "$(GO_TAGS)" ./...

${GOTESTSUM_FILE}:
	mkdir -p $(shell dirname ${GOTESTSUM_FILE})
	curl -L https://github.com/gotestyourself/gotestsum/releases/download/v${GOTESTSUM_VERSION}/gotestsum_${GOTESTSUM_VERSION}_${OS}_${ARCH}.tar.gz | tar -zOxf - gotestsum > ${GOTESTSUM_FILE} && chmod +x ${GOTESTSUM_FILE}

test_race:
	go test -race -timeout 1m -count 1 ./... -v

coverage: 
	[ -f cover.out ] && go tool cover -func cover.out

lint:
	@support/lint.sh ./...

golangci: ${GOLANGCI_LINT_FILE}
	@${GOLANGCI_LINT_FILE} run --issues-exit-code 0 --print-issued-lines=false ${GOLANGCI_LINT_ARGS}

${GOLANGCI_LINT_FILE}:
	@mkdir -p $(shell dirname ${GOLANGCI_LINT_FILE})
	@curl -L https://github.com/golangci/golangci-lint/releases/download/v${GOLANGCI_LINT_VERSION}/golangci-lint-${GOLANGCI_LINT_VERSION}-${OS}-${ARCH}.tar.gz | tar --strip-components 1 -zOxf - golangci-lint-${GOLANGCI_LINT_VERSION}-${OS}-${ARCH}/golangci-lint > ${GOLANGCI_LINT_FILE} && chmod +x ${GOLANGCI_LINT_FILE}

setup: make_necessary_dirs bin/gitlab-shell

make_necessary_dirs:
	support/make_necessary_dirs

compile: bin/gitlab-shell bin/gitlab-sshd

bin:
	mkdir -p bin

bin/gitlab-shell: bin $(GO_SOURCES)
	go build $(GOBUILD_FLAGS) -o $(CURDIR)/bin ./cmd/...

bin/gitlab-sshd: bin $(GO_SOURCES)
	go build $(GOBUILD_FLAGS) -o $(CURDIR)/bin/gitlab-sshd ./cmd/gitlab-sshd

check:
	bin/gitlab-shell-check

clean:
	rm -f bin/*

install: compile
	mkdir -p $(DESTDIR)$(PREFIX)/bin/
	install -m755 bin/gitlab-shell-check $(DESTDIR)$(PREFIX)/bin/
	install -m755 bin/gitlab-shell $(DESTDIR)$(PREFIX)/bin/
	install -m755 bin/gitlab-shell-authorized-keys-check $(DESTDIR)$(PREFIX)/bin/
	install -m755 bin/gitlab-shell-authorized-principals-check $(DESTDIR)$(PREFIX)/bin/
	install -m755 bin/gitlab-sshd $(DESTDIR)$(PREFIX)/bin/