Makefile

MODULE   = $(shell env GO111MODULE=on $(GO) list -m)
DATE    ?= $(shell date +%FT%T%z)
VERSION ?= $(shell git describe --tags --always --dirty --match="v*" 2> /dev/null || \
			cat $(CURDIR)/.version 2> /dev/null || echo v0)
PKGS     = $(or $(PKG),$(shell env GO111MODULE=on $(GO) list ./...))

BIN      = $(CURDIR)/.bin
GOLANGCI_LINT_CONFIG = $(CURDIR)/.golangci.yaml
GO      = go
GOLANGCI_LINT = golangci-lint
TIMEOUT = 15
V = 0
Q = $(if $(filter 1,$V),,@)
M = $(shell printf "\033[34;1m▶\033[0m")

export GO111MODULE=on
export CGO_ENABLED=0
export GOPROXY=https://proxy.golang.org

.PHONY: all
all: fmt lint | $(BIN) ; $(info $(M) building executable…) @ ## Build program binary
	$Q $(GO) build \
		-tags release \
		-ldflags '-X main.Version=$(VERSION) -X main.BuildDate=$(DATE)' \
		-o $(BIN)/$(basename $(MODULE)) main.go

# Tools
$(BIN):
	@mkdir -p $@
$(BIN)/%: | $(BIN) ; $(info $(M) building $(PACKAGE)…)
	$Q tmp=$$(mktemp -d); \
	   env GO111MODULE=off GOPATH=$$tmp GOBIN=$(BIN) $(GO) get $(PACKAGE) \
		|| ret=$$?; \
	   rm -rf $$tmp ; exit $$ret

.PHONY: lint
lint: | $(info $(M) running golangci-lint…) ## Run golangci-lint
	$Q $(GOLANGCI_LINT) run -v -c $(GOLANGCI_LINT_CONFIG) .

.PHONY: fmt
fmt: ; $(info $(M) running gofmt…) @ ## Run gofmt on all source files
	$Q $(GO) fmt $(PKGS)

# Misc

.PHONY: clean
clean: ; $(info $(M) cleaning…)	@ ## Cleanup everything
	@rm -rf $(BIN)
	@rm -rf test/tests.* test/coverage.*

.PHONY: help
help:
	@grep -E '^[ a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | \
		awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-15s\033[0m %s\n", $$1, $$2}'

.PHONY: version
version:
	@echo $(VERSION)

.PHONY: update
update:
	$(GO) get -u -v ./
	$(GO) mod verify
	$(GO) mod tidy