.PHONY: help

TMUX_VERSION     := 3.1b
NCURSES_VERSION  := 6.2
LIBEVENT_VERSION := 2.1.10-stable
UTF8PROC_VERSION := 2.4.0

BUILD_DIR           = $(CURDIR)
BUILD_PREBUILT_DEP  = $(BUILD_DIR)/prebuilt/dep
BUILD_PREBUILT_TMUX = $(BUILD_DIR)/prebuilt/tmux

LIBEVENT          = libevent-$(LIBEVENT_VERSION)
LIBEVENT_TGZ      = $(LIBEVENT).tar.gz
LIBEVENT_URL      = https://github.com/libevent/libevent/releases/download/release-$(LIBEVENT_VERSION)/$(LIBEVENT_TGZ)

NCURSES_URL       =


TMUX             := tmux-$(TMUX_VERSION).musl-bin.tar.gz

help: ## Display this help message
	@echo "Tmux: v$(TMUX_VERSION)"
	@echo "NCurses: v$(NCURSES_VERSION)"
	@echo "LibEvent: v$(LIBEVENT_VERSION)"
	@echo "UTF8Proc: v$(UTF8PROC_VERSION)"
	@echo ""
	@echo "Usage:"
	@sed -nE "s/^([^:]+):\\s+##\\s+(.+)$$/\tmake \\1\t- \\2/p" \
		$(lastword $(MAKEFILE_LIST))

clean: ## Remove all build and dist directories
	-rm -rf prebuilt $(LIBEVENT)

tmux: ## Build static tmux archive
	$(MAKE) $(TMUX)

####
#### Libevent
####

####
#### Libevent
####
libevent: ## Download and build libevent library
	$(MAKE) $(BUILD_PREBUILT_DEP)/lib/libevent.a

$(BUILD_PREBUILT_DEP)/lib/libevent.a: $(LIBEVENT)/.libs/libevent.a
	$(MAKE) -C $(LIBEVENT) install

$(LIBEVENT)/.libs/libevent.a: $(LIBEVENT)/Makefile
	$(MAKE) -C $(LIBEVENT) -j4 all

$(LIBEVENT)/Makefile: $(LIBEVENT)
	cd $(LIBEVENT) \
		&& ./configure \
				--prefix="$(BUILD_PREBUILT_DEP)" \
				--disable-openssl \
				--enable-shared=no \
				--enable-static=yes \
				--with-pic

$(LIBEVENT): $(LIBEVENT_TGZ)
	tar xzf $<

$(LIBEVENT_TGZ):
	curl -Lk $(LIBEVENT_URL) -o $@

$(BUILD_PREBUILT_DEP): $(BUILD_DIR)
	mkdir -pv $@

$(BUILD_PREBUILT_TMUX): $(BUILD_DIR)
	mkdir -pv $@