.POSIX:
.SUFFIXES:
.DEFAULT_GOAL := all

include config.mk

# flags for compiling
DWLCPPFLAGS = -I$(INCLUDE) -DWLR_USE_UNSTABLE -D_POSIX_C_SOURCE=200809L \
	-DVERSION=\"$(VERSION)\" $(XWAYLAND)
DWLDEVCFLAGS = -g -Wpedantic -Wall -Wextra -Wdeclaration-after-statement \
	-Wno-unused-parameter -Wshadow -Wunused-macros -Werror=strict-prototypes \
	-Werror=implicit -Werror=return-type -Werror=incompatible-pointer-types \
	-Wfloat-conversion

# CFLAGS / LDFLAGS
PKGS      = wayland-server xkbcommon libinput $(XLIBS)
DWLCFLAGS = `$(PKG_CONFIG) --cflags $(PKGS)` $(WLR_INCS) $(DWLCPPFLAGS) $(DWLDEVCFLAGS) $(CFLAGS)
LDLIBS    = `$(PKG_CONFIG) --libs $(PKGS)` $(WLR_LIBS) -lm $(LIBS)

# macros to relevant path definitions
define mkbin
$(addprefix $(BIN)/,$1)
endef
define mkobj
$(addprefix $(OBJ)/,$1)
endef
define mkinclude
$(addprefix $(INCLUDE)/,$1)
endef
define mksrc
$(addprefix $(SRC)/,$1)
endef

.PHONY: setup
setup:
	mkdir -p $(BIN) $(BUILD) $(INCLUDE) $(OBJ)

all: setup $(BIN)/$(BINARY) $(BUILD)/$(BINARY).desktop
$(BIN)/$(BINARY): $(call mkobj,main.o util.o)
	$(CC) $^ $(DWLCFLAGS) $(LDFLAGS) $(LDLIBS) -o $@
$(OBJ)/main.o: $(call mksrc,main.c client.h) config.mk $(call mkinclude,config.h cursor-shape-v1-protocol.h \
	pointer-constraints-unstable-v1-protocol.h wlr-layer-shell-unstable-v1-protocol.h \
	wlr-output-power-management-unstable-v1-protocol.h xdg-shell-protocol.h)
$(OBJ)/util.o: $(call mksrc,util.c util.h)

# wayland-scanner is a tool which generates C headers and rigging for Wayland
# protocols, which are specified in XML. wlroots requires you to rig these up
# to your build system yourself and provide them in the include path.
WAYLAND_SCANNER   = `$(PKG_CONFIG) --variable=wayland_scanner wayland-scanner`
WAYLAND_PROTOCOLS = `$(PKG_CONFIG) --variable=pkgdatadir wayland-protocols`

$(INCLUDE)/cursor-shape-v1-protocol.h:
	$(WAYLAND_SCANNER) enum-header \
		$(WAYLAND_PROTOCOLS)/staging/cursor-shape/cursor-shape-v1.xml $@
$(INCLUDE)/pointer-constraints-unstable-v1-protocol.h:
	$(WAYLAND_SCANNER) enum-header \
		$(WAYLAND_PROTOCOLS)/unstable/pointer-constraints/pointer-constraints-unstable-v1.xml $@
$(INCLUDE)/wlr-layer-shell-unstable-v1-protocol.h:
	$(WAYLAND_SCANNER) enum-header \
		protocols/wlr-layer-shell-unstable-v1.xml $@
$(INCLUDE)/wlr-output-power-management-unstable-v1-protocol.h:
	$(WAYLAND_SCANNER) server-header \
		protocols/wlr-output-power-management-unstable-v1.xml $@
$(INCLUDE)/xdg-shell-protocol.h:
	$(WAYLAND_SCANNER) server-header \
		$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@

$(INCLUDE)/config.h:
	cp $(SRC)/config.def.h $@

$(BUILD)/$(BINARY).desktop:
	mkdir -p $(BUILD)
	echo -e "[Desktop Entry]\nName=$(BINARY)\nComment=$(DESCRIPTION)\nExec=$(BINARY)\nType=Application" > $@
	
clean:
	rm -rf $(INCLUDE) $(OBJ) $(BUILD) $(BIN) 

dist: clean $(BUILD)/$(BINARY).desktop
	mkdir -p $(BINARY)-$(VERSION)
	cp -R LICENSE Makefile CHANGELOG.md README.md src \
		config.mk protocols dwl.1 $(BUILD)/$(BINARY).desktop \
		$(BINARY)-$(VERSION)
	tar -caf $(BINARY)-$(VERSION).tar.gz $(BINARY)-$(VERSION)
	rm -rf $(BINARY)-$(VERSION) $(BUILD)

install: $(BIN)/$(BINARY) $(BUILD)/$(BINARY).desktop
	mkdir -p $(DESTDIR)$(PREFIX)/bin
	rm -f $(DESTDIR)$(PREFIX)/bin/$(BINARY)
	cp -f $(BIN)/$(BINARY) $(DESTDIR)$(PREFIX)/bin
	chmod 755 $(DESTDIR)$(PREFIX)/bin/$(BINARY)
	mkdir -p $(DESTDIR)$(MANDIR)/man1
	cp -f dwl.1 $(DESTDIR)$(MANDIR)/man1
	chmod 644 $(DESTDIR)$(MANDIR)/man1/dwl.1
	mkdir -p $(DESTDIR)$(DATADIR)/wayland-sessions
	cp -f $(BUILD)/$(BINARY).desktop $(DESTDIR)$(DATADIR)/wayland-sessions/$(BINARY).desktop
	chmod 644 $(DESTDIR)$(DATADIR)/wayland-sessions/$(BINARY).desktop
uninstall:
	rm -f $(DESTDIR)$(PREFIX)/bin/$(BINARY) $(DESTDIR)$(MANDIR)/man1/dwl.1 \
		$(DESTDIR)$(DATADIR)/wayland-sessions/$(BINARY).desktop

%.c %.o:
	$(CC) $(CPPFLAGS) $(DWLCFLAGS) -o $@ -c $<