PKG := github.com/btcsuite/btcwallet

GOVERALLS_PKG := github.com/mattn/goveralls
LINT_PKG := github.com/golangci/golangci-lint/cmd/golangci-lint
GOACC_PKG := github.com/ory/go-acc
GOIMPORTS_PKG := golang.org/x/tools/cmd/goimports

GO_BIN := ${GOPATH}/bin
GOVERALLS_BIN := $(GO_BIN)/goveralls
LINT_BIN := $(GO_BIN)/golangci-lint
GOACC_BIN := $(GO_BIN)/go-acc

LINT_COMMIT := v1.18.0
GOACC_COMMIT := ddc355013f90fea78d83d3a6c71f1d37ac07ecd5

DEPGET := cd /tmp && GO111MODULE=on go get -v
GOBUILD := GO111MODULE=on go build -v
GOINSTALL := GO111MODULE=on go install -v
GOTEST := GO111MODULE=on go test 

GOLIST := go list -deps $(PKG)/... | grep '$(PKG)'
GOLIST_COVER := $$(go list -deps $(PKG)/... | grep '$(PKG)')
GOFILES_NOVENDOR = $(shell find . -type f -name '*.go' -not -path "./vendor/*")

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

# Linting uses a lot of memory, so keep it under control by limiting the number
# of workers if requested.
ifneq ($(workers),)
LINT_WORKERS = --concurrency=$(workers)
endif

LINT = $(LINT_BIN) run -v $(LINT_WORKERS)

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

default: build

all: build check

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

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

$(LINT_BIN):
	@$(call print, "Fetching linter")
	$(DEPGET) $(LINT_PKG)@$(LINT_COMMIT)

$(GOACC_BIN):
	@$(call print, "Fetching go-acc")
	$(DEPGET) $(GOACC_PKG)@$(GOACC_COMMIT)

goimports:
	@$(call print, "Installing goimports.")
	$(DEPGET) $(GOIMPORTS_PKG)

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

build:
	@$(call print, "Compiling btcwallet.")
	$(GOBUILD) $(PKG)/...

install:
	@$(call print, "Installing btcwallet.")
	$(GOINSTALL) $(PKG)
	$(GOINSTALL) $(PKG)/cmd/dropwtxmgr
	$(GOINSTALL) $(PKG)/cmd/sweepaccount

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

check: unit

unit:
	@$(call print, "Running unit tests.")
	$(GOLIST) | $(XARGS) env $(GOTEST)

unit-cover: $(GOACC_BIN)
	@$(call print, "Running unit coverage tests.")
	$(GOACC_BIN) $(GOLIST_COVER)

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

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

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

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

lint: $(LINT_BIN)
	@$(call print, "Linting source.")
	$(LINT)

clean:
	@$(call print, "Cleaning source.$(NC)")
	$(RM) coverage.txt

.PHONY: all \
	default \
	build \
	check \
	unit \
	unit-cover \
	unit-race \
	goveralls \
	fmt \
	lint \
	clean