PKG := github.com/lightningnetwork/lnd
ESCPKG := github.com\/lightningnetwork\/lnd

BTCD_PKG := github.com/btcsuite/btcd
GOVERALLS_PKG := github.com/mattn/goveralls
LINT_PKG := gopkg.in/alecthomas/gometalinter.v2
GOACC_PKG := github.com/ory/go-acc

GO_BIN := ${GOPATH}/bin
BTCD_BIN := $(GO_BIN)/btcd
GOVERALLS_BIN := $(GO_BIN)/goveralls
LINT_BIN := $(GO_BIN)/gometalinter.v2
GOACC_BIN := $(GO_BIN)/go-acc

BTCD_DIR :=${GOPATH}/src/$(BTCD_PKG)

COMMIT := $(shell git describe --abbrev=40 --dirty)
LDFLAGS := -ldflags "-X $(PKG)/build.Commit=$(COMMIT)"

BTCD_COMMIT := $(shell cat go.mod | \
		grep $(BTCD_PKG) | \
		tail -n1 | \
		awk -F " " '{ print $$2 }' | \
		awk -F "/" '{ print $$1 }')

GOACC_COMMIT := ddc355013f90fea78d83d3a6c71f1d37ac07ecd5

GOBUILD := GO111MODULE=on go build -v
GOINSTALL := GO111MODULE=on go install -v
GOTEST := GO111MODULE=on go test -v

GOFILES_NOVENDOR = $(shell find . -type f -name '*.go' -not -path "./vendor/*")
GOLIST := go list $(PKG)/... | grep -v '/vendor/'
GOLISTCOVER := $(shell go list -f '{{.ImportPath}}' ./... | sed -e 's/^$(ESCPKG)/./')
GOLISTLINT := $(shell go list -f '{{.Dir}}' ./... | grep -v 'lnrpc')

RM := rm -f
CP := cp
MAKE := make
XARGS := xargs -L 1

include make/testing_flags.mk

DEV_TAGS := $(if ${tags},$(DEV_TAGS) ${tags},$(DEV_TAGS))

LINT = $(LINT_BIN) \
	--disable-all \
	--enable=gofmt \
	--enable=vet \
	--enable=golint \
	--line-length=72 \
	--deadline=4m $(GOLISTLINT) 2>&1 | \
	grep -v 'ALL_CAPS\|OP_' 2>&1 | \
	tee /dev/stderr

GREEN := "\\033[0;32m"
NC := "\\033[0m"
define print
	echo $(GREEN)$1$(NC)
endef

default: scratch

all: scratch check install

# ============
# DEPENDENCIES
# ============

$(GOVERALLS_BIN):
	@$(call print, "Fetching goveralls.")
	go get -u $(GOVERALLS_PKG)

$(LINT_BIN):
	@$(call print, "Fetching gometalinter.v2")
	GO111MODULE=off go get -u $(LINT_PKG)

$(GOACC_BIN):
	@$(call print, "Fetching go-acc")
	go get -u -v $(GOACC_PKG)@$(GOACC_COMMIT)
	$(GOINSTALL) $(GOACC_PKG)

btcd:
	@$(call print, "Installing btcd.")
	GO111MODULE=on go get -v $(BTCD_PKG)@$(BTCD_COMMIT)
	$(GOINSTALL) $(BTCD_PKG)
	$(GOINSTALL) $(BTCD_PKG)/cmd/btcctl

# ============
# INSTALLATION
# ============

build:
	@$(call print, "Building debug lnd and lncli.")
	$(GOBUILD) -tags="$(DEV_TAGS)" -o lnd-debug $(LDFLAGS) $(PKG)
	$(GOBUILD) -tags="$(DEV_TAGS)" -o lncli-debug $(LDFLAGS) $(PKG)/cmd/lncli

build-itest:
	@$(call print, "Building itest lnd and lncli.")
	$(GOBUILD) -tags="$(ITEST_TAGS)" -o lnd-itest $(LDFLAGS) $(PKG)
	$(GOBUILD) -tags="$(ITEST_TAGS)" -o lncli-itest $(LDFLAGS) $(PKG)/cmd/lncli

install:
	@$(call print, "Installing lnd and lncli.")
	$(GOINSTALL) -tags="${tags}" $(LDFLAGS) $(PKG)
	$(GOINSTALL) -tags="${tags}" $(LDFLAGS) $(PKG)/cmd/lncli

scratch: build


# =======
# TESTING
# =======

check: unit itest

itest-only:
	@$(call print, "Running integration tests.")
	$(ITEST)

itest: btcd build-itest itest-only

unit: btcd
	@$(call print, "Running unit tests.")
	$(UNIT)

unit-cover: $(GOACC_BIN)
	@$(call print, "Running unit coverage tests.")
	$(GOACC_BIN) $$(go list ./... | grep -v lnrpc) -- -test.tags="$(DEV_TAGS) $(LOG_TAGS)"

unit-race:
	@$(call print, "Running unit race tests.")
	env CGO_ENABLED=1 GORACE="history_size=7 halt_on_errors=1" $(UNIT_RACE)

goveralls: $(GOVERALLS_BIN)
	@$(call print, "Sending coverage report.")
	$(GOVERALLS_BIN) -coverprofile=coverage.txt -service=travis-ci


travis-race: lint btcd unit-race

travis-cover: lint btcd unit-cover goveralls

travis-itest: lint itest

# =============
# FLAKE HUNTING
# =============

flakehunter: build-itest
	@$(call print, "Flake hunting integration tests.")
	while [ $$? -eq 0 ]; do $(ITEST); done

flake-unit:
	@$(call print, "Flake hunting unit tests.")
	while [ $$? -eq 0 ]; do GOTRACEBACK=all $(UNIT) -count=1; done

# =========
# UTILITIES
# =========

fmt:
	@$(call print, "Formatting source.")
	gofmt -l -w -s $(GOFILES_NOVENDOR)

lint: $(LINT_BIN)
	@$(call print, "Linting source.")
	GO111MODULE=off $(LINT_BIN) --install 1> /dev/null
	test -z "$$($(LINT))"

list:
	@$(call print, "Listing commands.")
	@$(MAKE) -qp | \
		awk -F':' '/^[a-zA-Z0-9][^$$#\/\t=]*:([^=]|$$)/ {split($$1,A,/ /);for(i in A)print A[i]}' | \
		grep -v Makefile | \
		sort

rpc:
	@$(call print, "Compiling protos.")
	cd ./lnrpc; ./gen_protos.sh

clean:
	@$(call print, "Cleaning source.$(NC)")
	$(RM) ./lnd-debug ./lncli-debug
	$(RM) ./lnd-itest ./lncli-itest
	$(RM) -r ./vendor .vendor-new


.PHONY: all \
	btcd \
	default \
	build \
	install \
	scratch \
	check \
	itest-only \
	itest \
	unit \
	unit-cover \
	unit-race \
	goveralls \
	travis-race \
	travis-cover \
	travis-itest \
	flakehunter \
	flake-unit \
	fmt \
	lint \
	list \
	rpc \
	clean