SHELL := /usr/bin/env bash

GO ?= go
GOFMT ?= gofmt
INSTALL ?= install
PREFIX ?= $(HOME)/.local
BINDIR ?= $(PREFIX)/bin
DESTDIR ?=
BINARIES := banger bangerd
GO_SOURCES := $(shell find cmd internal -type f -name '*.go' | sort)

.DEFAULT_GOAL := help

.PHONY: help build banger bangerd test fmt tidy clean rootfs install

help:
	@printf '%s\n' \
	  'Targets:' \
	  '  make build   Build ./banger and ./bangerd' \
	  '  make install Build and install binaries into $(DESTDIR)$(BINDIR)' \
	  '  make test    Run go test ./...' \
	  '  make fmt     Format Go sources under cmd/ and internal/' \
	  '  make tidy    Run go mod tidy' \
	  '  make clean   Remove built Go binaries' \
	  '  make rootfs  Run ./make-rootfs.sh'

build: $(BINARIES)

banger: $(GO_SOURCES) go.mod go.sum
	$(GO) build -o ./banger ./cmd/banger

bangerd: $(GO_SOURCES) go.mod go.sum
	$(GO) build -o ./bangerd ./cmd/bangerd

test:
	$(GO) test ./...

fmt:
	$(GOFMT) -w $(GO_SOURCES)

tidy:
	$(GO) mod tidy

clean:
	rm -f ./banger ./bangerd

install: build
	mkdir -p "$(DESTDIR)$(BINDIR)"
	$(INSTALL) -m 0755 ./banger "$(DESTDIR)$(BINDIR)/banger"
	$(INSTALL) -m 0755 ./bangerd "$(DESTDIR)$(BINDIR)/bangerd"

rootfs:
	./make-rootfs.sh