PROJ     := kdnotify
PROJPATH := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
BUILD    ?= $(PROJPATH)build

GO     ?= $(shell command -v go)
GOOS   ?= $(shell go env GOOS)
GOARCH ?= $(shell go env GOARCH)

SRC        := $(shell find . -iname "*.go" -not -iname '*_test.go')
TEST_SRC   := $(shell find . -iname '*_test.go')
CONFIGURE  := $(BUILD)/.B.configure
BUILDFLAGS := $(BUILD)/.B.buildflags
BUILDINFO  := git.st8l.com/luxolus/kdnotify/buildinfo

Version  ?= $(shell git describe --tags --abbrev=0 2>/dev/null)
Commit   ?= $(shell git rev-parse HEAD 2>/dev/null)
Features ?= ""
Prefix   ?= /bin
Systemd  ?= /usr/lib/systemd

$(shell mkdir -p $(BUILD))

.DEFAULT_GOAL := help
.PHONY: help
help:
	@FILE=Makefile ./tool/make2doc.sh

## Build the project
##
## @param GOOS Compile for a different OS than the current
## @param GOARCH Compile for a different architecture than the current
## Also, see T:configure's docs for other compile time configuration
.PHONY: build
build: $(BUILD)/$(PROJ)
	@echo "==> Built $(PROJ) -> $(BUILD)/$(PROJ)"

## Configure the build
##
## You can override the autodetected defaults with the following params
## @param Version=v<X.X.X> Version of this binary [Most recent Git tag]
## @param Commit=<SHA> Commit SHA of this binary [Git HEAD]
## @param Features=<,list> Comma separated list of features to enable [None]
## @param Prefix=/bin Path install binaries in
## @param Systemd=/usr/lib/systemd Path to systemd installation, empty to skip
.PHONY: configure
configure:
	@$(MAKE) --silent -B $(CONFIGURE)

## Install this project
.PHONY: install
install: $(BUILD)/$(PROJ)
	@. $(CONFIGURE) && \
		install -Dm 755 $< $$BIN_PATH/$(PROJ) && \
		install -Dm 644 -t $$SYSTEMD_PATH/system/ \
			./systemd/kdnotify.*

## Clean build artifacts
.PHONY: clean
clean:
	@rm -rvf $(BUILD)

## Format the project
.PHONY: fmt
fmt:
	@$(GO) fmt ./...

## Check for code issues
.PHONY: vet
vet:
	@$(GO) vet -c=8 ./...

## Run project fast checks
.PHONY: check
check: test.fmt vet test.unit

## Run unit tests
.PHONY: test.unit
test.unit:
	@$(GO) test ./...

## Check code formatting
.PHONY: test.fmt
test.fmt:
	@./tool/fmtck.sh $(SRC) $(TEST_SRC)

$(BUILD)/$(PROJ): $(CONFIGURE) $(SRC)
	@. $(CONFIGURE) && $(GO) \
		build \
		-o $@ \
		-buildmode=pie \
		-ldflags "-linkmode=external -extldflags=$$LDFLAGS $$BUILDFLAGS"

$(CONFIGURE): $(BUILDFLAGS)
	@cat $@ >$@
	@echo "BUILDFLAGS='$$(xargs <$(BUILDFLAGS))'" >>$@
	@echo "BIN_PATH=$(Prefix)" >>$@
	@echo "SYSTEMD_PATH=$(Systemd)" >>$@

$(BUILDFLAGS):
	@cat $@ >$@
	@echo '-X $(BUILDINFO).Version=$(Version)' >>$@
	@echo '-X $(BUILDINFO).CommitHash=$(Commit)' >>$@
	@echo '-X $(BUILDINFO).Features=$(Features)' >>$@

# vim: ts=4 sts=4