.POSIX:
.SUFFIXES:

VERSION = `git describe --tags --dirty 2>/dev/null || echo 0.2`
PREFIX  = /usr/local
PKG_CONFIG = pkg-config

# Auto-detect compiler: TCC > Clang > GCC (only if CC not set)
ifeq ($(origin CC),default)
  ifeq ($(shell which tcc 2>/dev/null),)
    ifeq ($(shell which clang 2>/dev/null),)
      CC = gcc
    else
      CC = clang
    endif
  else
    CC = tcc
  endif
endif

# Uncomment to build without XWayland support
#XWAYLAND =
#XLIBS =
XWAYLAND = -DXWAYLAND
XLIBS = xcb xcb-icccm

LUA_PKG = lua5.4
PKGS    = wayland-server xkbcommon libinput $(LUA_PKG) $(XLIBS)

CFLAGS   = `$(PKG_CONFIG) --cflags $(PKGS) wlroots-0.20` \
	-I. -Iinclude -Isrc -Iparser -Iprotocols \
	-DWLR_USE_UNSTABLE -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" \
	$(XWAYLAND) -g -Wall -Wextra -Wno-unused-parameter -O2 -std=c11
LDLIBS   = `$(PKG_CONFIG) --libs $(PKGS) wlroots-0.20` -lm $(LIBS)

SMSG_CFLAGS = `$(PKG_CONFIG) --cflags wayland-client` -Wall -Wextra -Wno-unused-parameter
SMSG_LDLIBS = `$(PKG_CONFIG) --libs wayland-client`

SCANNER   = $(shell $(PKG_CONFIG) --variable=wayland_scanner wayland-scanner)
WLPROTO   = $(shell $(PKG_CONFIG) --variable=pkgdatadir wayland-protocols)

PROTO_OBJS = protocols/peachwm-ipc-unstable-v2-protocol.o \
	protocols/ext-workspace-v1-protocol.o

all: peachwm smsg/smsg

release: CC = clang
release: CFLAGS += -Werror -Wpedantic -Wmissing-prototypes -Wstrict-prototypes \
	-Wold-style-definition -Wmissing-declarations -Wimplicit-fallthrough \
	-march=native
release: peachwm smsg/smsg

debug: CC = clang
debug: CFLAGS += -Werror -Weverything \
	-Wno-padded -Wno-unsafe-buffer-usage \
	-Wno-c++-keyword -Wno-reserved-macro-identifier -Wno-reserved-identifier \
	-Wno-pre-c11-compat -Wno-implicit-void-ptr-cast -Wno-switch-default \
	-Wno-sign-conversion -Wno-used-but-marked-unused \
	-Wno-cast-align -Wno-disabled-macro-expansion \
	-Wno-double-promotion -Wno-bad-function-cast \
	-Wno-implicit-int-conversion -Wno-shadow \
	-Wno-declaration-after-statement \
	-Wno-switch-enum -Wno-implicit-int-enum-cast \
	-Wno-format-signedness -Wno-cast-qual \
	-Wno-implicit-int-float-conversion -Wno-unused-macros \
	-Wno-unreachable-code-break -Wno-missing-format-attribute \
	-Wno-format-nonliteral -Wno-float-conversion \
	-Wno-tentative-definition-compat -Wno-missing-variable-declarations \
	-g3 -fno-omit-frame-pointer -fsanitize=address,undefined,leak \
	-fsanitize-trap=all
debug: LDLIBS += -fsanitize=address,undefined,leak
debug: peachwm smsg/smsg

# Compositor

peachwm: src/peachwm.o src/util.o parser/parser.o \
	src/wlr_ext_workspace_v1.o $(PROTO_OBJS)
	$(CC) $^ $(LDFLAGS) $(LDLIBS) -o $@

src/peachwm.o: src/peachwm.c include/client.h include/ipc.h \
	include/ext-workspace.h src/wlr_ext_workspace_v1.h parser/parser.h \
	protocols/peachwm-ipc-unstable-v2-protocol.h \
	protocols/ext-workspace-v1-protocol.h \
	protocols/cursor-shape-v1-protocol.h \
	protocols/pointer-constraints-unstable-v1-protocol.h \
	protocols/wlr-layer-shell-unstable-v1-protocol.h \
	protocols/wlr-output-power-management-unstable-v1-protocol.h \
	protocols/xdg-shell-protocol.h
	$(CC) $(CFLAGS) -o $@ -c $<

src/util.o: src/util.c src/util.h
	$(CC) $(CFLAGS) -o $@ -c $<

src/wlr_ext_workspace_v1.o: src/wlr_ext_workspace_v1.c \
	src/wlr_ext_workspace_v1.h protocols/ext-workspace-v1-protocol.h
	$(CC) $(CFLAGS) -o $@ -c $<

parser/parser.o: parser/parser.c parser/parser.h
	$(CC) $(CFLAGS) -o $@ -c $<

$(PROTO_OBJS): protocols/%-protocol.o: protocols/%-protocol.c protocols/%-protocol.h
	$(CC) $(CFLAGS) -o $@ -c $<

# Protocol headers and glue code

CURSOR_SHAPE_XML = $(WLPROTO)/staging/cursor-shape/cursor-shape-v1.xml
POINTER_CONSTRAINTS_XML = $(WLPROTO)/unstable/pointer-constraints/pointer-constraints-unstable-v1.xml
XDG_SHELL_XML = $(WLPROTO)/stable/xdg-shell/xdg-shell.xml

protocols/cursor-shape-v1-protocol.h: $(CURSOR_SHAPE_XML)
	$(SCANNER) server-header $< $@

protocols/pointer-constraints-unstable-v1-protocol.h: $(POINTER_CONSTRAINTS_XML)
	$(SCANNER) server-header $< $@

protocols/wlr-layer-shell-unstable-v1-protocol.h: protocols/wlr-layer-shell-unstable-v1.xml
	$(SCANNER) server-header $< $@

protocols/wlr-output-power-management-unstable-v1-protocol.h: protocols/wlr-output-power-management-unstable-v1.xml
	$(SCANNER) server-header $< $@

protocols/xdg-shell-protocol.h: $(XDG_SHELL_XML)
	$(SCANNER) server-header $< $@

protocols/peachwm-ipc-unstable-v2-protocol.h: protocols/peachwm-ipc-unstable-v2.xml
	$(SCANNER) server-header $< $@

protocols/peachwm-ipc-unstable-v2-protocol.c: protocols/peachwm-ipc-unstable-v2.xml
	$(SCANNER) private-code $< $@

protocols/ext-workspace-v1-protocol.h: protocols/ext-workspace-v1.xml
	$(SCANNER) server-header $< $@

protocols/ext-workspace-v1-protocol.c: protocols/ext-workspace-v1.xml
	$(SCANNER) private-code $< $@

# smsg IPC client

smsg/peachwm-ipc-unstable-v2-protocol.h: protocols/peachwm-ipc-unstable-v2.xml
	$(SCANNER) client-header $< $@

smsg/peachwm-ipc-unstable-v2-protocol.c: protocols/peachwm-ipc-unstable-v2.xml
	$(SCANNER) private-code $< $@

smsg/peachwm-ipc-unstable-v2-protocol.o: smsg/peachwm-ipc-unstable-v2-protocol.c smsg/peachwm-ipc-unstable-v2-protocol.h
	$(CC) $(SMSG_CFLAGS) -o $@ -c $<

smsg/smsg.o: smsg/smsg.c smsg/peachwm-ipc-unstable-v2-protocol.h
	$(CC) $(SMSG_CFLAGS) -o $@ -c $<

smsg/smsg: smsg/smsg.o smsg/peachwm-ipc-unstable-v2-protocol.o
	$(CC) $^ $(SMSG_CFLAGS) $(SMSG_LDLIBS) -o $@

clean:
	rm -f peachwm smsg/smsg src/*.o parser/*.o smsg/*.o \
		protocols/*.o protocols/*-protocol.h protocols/*-protocol.c \
		smsg/*-protocol.h smsg/*-protocol.c

install: peachwm smsg/smsg
	mkdir -p $(DESTDIR)$(PREFIX)/bin
	cp -f peachwm $(DESTDIR)$(PREFIX)/bin
	chmod 755 $(DESTDIR)$(PREFIX)/bin/peachwm
	cp -f smsg/smsg $(DESTDIR)$(PREFIX)/bin
	chmod 755 $(DESTDIR)$(PREFIX)/bin/smsg
	mkdir -p $(DESTDIR)/etc/peachwm
	cp -r example/* $(DESTDIR)/etc/peachwm

uninstall:
	rm -f $(DESTDIR)$(PREFIX)/bin/peachwm
	rm -f $(DESTDIR)$(PREFIX)/bin/smsg
	rm -rf $(DESTDIR)/etc/peachwm