Makefile

.PHONY: all clean generate fmt tidy
.PHONY: FORCE

GO ?= go
GOFMT ?= gofmt
GOFMT_FLAGS = -w -l -s
GOGENERATE_FLAGS = -v

GOPATH ?= $(shell $(GO) env GOPATH)
GOBIN ?= $(GOPATH)/bin

TOOLSDIR := $(CURDIR)/pkg/tools
TMPDIR ?= $(CURDIR)/.tmp
OUTDIR ?= $(TMPDIR)

REVIVE ?= $(GOBIN)/revive
REVIVE_CONF ?= $(TOOLSDIR)/revive.toml
REVIVE_RUN_ARGS ?= -config $(REVIVE_CONF) -formatter friendly
REVIVE_INSTALL_URL ?= github.com/mgechev/revive

GO_INSTALL_URLS = \
	$(REVIVE_INSTALL_URL) \

V = 0
Q = $(if $(filter 1,$V),,@)
M = $(shell if [ "$$(tput colors 2> /dev/null || echo 0)" -ge 8 ]; then printf "\033[34;1m▶\033[0m"; else printf "▶"; fi)

MODULE = $(shell grep ^module go.mod | cut -d' ' -f2)
CMD_VERSION = $(shell git describe --tags --always --dirty --match=v* 2> /dev/null || \
	      cat .version 2> /dev/null || echo v0)
CMD_COMMIT = $(shell git rev-parse --short HEAD)
CMD_BRANCH = $(shell git branch --show-current)
CMD_BUILDDATE = $(shell date -u +%s)

GO_VERSION_PACKAGE = $(MODULE)/pkg/version
GO_BUILD_CMD_LDFLAGS=-s -w \
      -X $(GO_VERSION_PACKAGE).Version=$(CMD_VERSION) \
      -X $(GO_VERSION_PACKAGE).Branch=$(CMD_BRANCH) \
      -X $(GO_VERSION_PACKAGE).Commit=$(CMD_COMMIT) \
      -X $(GO_VERSION_PACKAGE).BuildDate=$(CMD_BUILDDATE)

GO_BUILD = $(GO) build -v
GO_BUILD_CMD = $(GO_BUILD) -o "$(OUTDIR)" -ldflags "$(GO_BUILD_CMD_LDFLAGS)"

all: get generate tidy build

clean: ; $(info $(M) cleaning…)
	rm -rf $(TMPDIR)

$(TMPDIR)/index: $(TOOLSDIR)/gen_index.sh Makefile FORCE ; $(info $(M) generating index…)
	$Q mkdir -p $(@D)
	$Q $< > $@~
	$Q if cmp $@ $@~ 2> /dev/null >&2; then rm $@~; else mv $@~ $@; fi

$(TMPDIR)/gen.mk: $(TOOLSDIR)/gen_mk.sh $(TMPDIR)/index Makefile ; $(info $(M) generating subproject rules…)
	$Q mkdir -p $(@D)
	$Q $< $(TMPDIR)/index > $@~
	$Q if cmp $@ $@~ 2> /dev/null >&2; then rm $@~; else mv $@~ $@; fi

include $(TMPDIR)/gen.mk

fmt: ; $(info $(M) reformatting sources…)
	$Q find . -name '*.go' | xargs -r $(GOFMT) $(GOFMT_FLAGS)

tidy: fmt

generate: ; $(info $(M) running go:generate…)
	$Q git grep -l '^//go:generate' | sort -uV | xargs -r -n1 $(GO) generate $(GOGENERATE_FLAGS)

$(REVIVE):
	$Q $(GO) install -v $(REVIVE_INSTALL_URL)