include premake.make

LIBNAME := $(shell basename $$(pwd))
UNAME_S := $(shell uname -s)

PREFIX ?= /usr/local
CONFIGDIR ?= $(PREFIX)/etc
INCLUDEDIR ?= $(PREFIX)/include
LIBDIR ?= $(PREFIX)/lib
DATADIR ?= $(PREFIX)/share
DOCDIR ?= $(DATADIR)/$(LIBNAME)/doc
MANDIR ?= $(PREFIX)/man

ifeq ($(UNAME_S),Darwin)
	LINKERNAME := $(LIBNAME).dylib
	SONAME := $(LIBNAME).$(MAJOR).dylib
	REALNAME := $(LINKERNAME)
endif
ifeq ($(UNAME_S),OpenBSD)
	REALNAME := $(LIBNAME).so.$(MAJOR).$(MINOR)
endif
ifeq ($(UNAME_S),Linux)
	LINKERNAME := $(LIBNAME).so
	SONAME := $(LINKERNAME).$(MAJOR)
	REALNAME := $(SONAME).$(MINOR).$(PATCH)
endif
STATICLIB := $(LIBNAME).a

CXX ?= g++

CXXFLAGS += -Wshadow -Wall -Wpedantic -Wextra -Wno-unused-parameter
CXXFLAGS += -g3 -std=c++20 -fPIC
ifeq ($(DEBUG),1)
	CXXFLAGS += -D DEBUG -O0
	CONFIG := debug
else
	CXXFLAGS += -D NDEBUG -O3
	CONFIG := release
endif

OUTDIR := build/$(CONFIG)
BUILDDIR := build/obj

SRCS := $(notdir $(wildcard src/*.cpp))
OBJS := $(addprefix $(BUILDDIR)/, $(SRCS:.cpp=.o))
DEPS := $(addprefix $(BUILDDIR)/, $(SRCS:.cpp=.dep))
HDRS ?= $(wildcard src/*.hpp)
MANS := $(addprefix $(PREFIX)/, $(wildcard man/man*/*))

$(BUILDDIR)/%.o: src/%.cpp
	$(CXX) $(CXXFLAGS) -o $@ -MMD -MP -MT $@ -MF $(BUILDDIR)/$*.dep -c $<

%.dep: ;

$(MANDIR)/man1/%: man/man1/%
	install -m 0644 $< $@

$(MANDIR)/man3/%: man/man3/%
	install -m 0644 $< $@

$(MANDIR)/man5/%: man/man5/%
	install -m 0644 $< $@

.PHONY: all test clean install

all: $(BUILDDIR) $(OUTDIR) $(OUTDIR)/$(REALNAME) $(OUTDIR)/$(STATICLIB)

$(BUILDDIR):
	mkdir -p $@

$(OUTDIR):
	mkdir -p $@

$(OUTDIR)/$(REALNAME): $(OBJS)
ifeq ($(UNAME_S),Darwin)
	$(CXX) -dynamiclib -o $(OUTDIR)/$(REALNAME) -current_version $(MAJOR) -compatibility_version $(MINOR) $(LDFLAGS) $(OBJS) $(LDLIBS)
endif
ifeq ($(UNAME_S),OpenBSD)
	$(CXX) -g -shared -Wl,-soname,$(REALNAME) -o $(OUTDIR)/$(REALNAME) $(LDFLAGS) $(OBJS) $(LDLIBS)
endif
ifeq ($(UNAME_S),Linux)
	$(CXX) -g -shared -Wl,-soname,$(SONAME) -o $(OUTDIR)/$(REALNAME) $(LDFLAGS) $(OBJS) $(LDLIBS)
endif

-include $(DEPS)

$(OUTDIR)/$(STATICLIB): $(OBJS)
	ar r $(OUTDIR)/$(STATICLIB) $(OBJS)

ifeq ($(GENERATELIBHEADER),1)
$(OUTDIR)/$(LIBNAME).hpp: $(HDRS)
	@echo updating $(OUTDIR)/$(LIBNAME).hpp
	@cp /dev/null $(OUTDIR)/$(LIBNAME).hpp
	@for h in $(HDRS); \
	do \
		sed '/@exclude/d' $$h >> $(OUTDIR)/$(LIBNAME).hpp; \
	done
endif

test:
	$(MAKE) -C tests && tests/tests

clean:
	rm -rf build
	$(MAKE) -C tests clean

$(MANDIR)/man1:
	install -m 0755 -d $@

$(MANDIR)/man3:
	install -m 0755 -d $@

$(MANDIR)/man5:
	install -m 0755 -d $@

$(LIBDIR):
	install -m 0755 -d $@

$(INCLUDEDIR):
	install -m 0755 -d $@

ifeq ($(GENERATELIBHEADER),1)
install: $(MANDIR)/man1 $(MANDIR)/man3 $(MANDIR)/man5 $(LIBDIR) $(INCLUDEDIR) $(MANS) $(OUTDIR)/$(LIBNAME).hpp
	install -m 0644 $(OUTDIR)/$(LIBNAME).hpp $(INCLUDEDIR)
else
install: $(MANDIR)/man1 $(MANDIR)/man3 $(MANDIR)/man5 $(LIBDIR) $(INCLUDEDIR) $(MANS)
	install -m 0644 $(HDRS) $(INCLUDEDIR)/$(LIBNAME)
endif
	install -m 0644 $(OUTDIR)/$(REALNAME) $(LIBDIR)
	install -m 0644 $(OUTDIR)/$(STATICLIB) $(LIBDIR)
ifeq ($(UNAME_S),Darwin)
	cd $(LIBDIR) && ln -sf $(REALNAME) $(SONAME)
endif
ifeq ($(UNAME_S),Linux)
ifeq ($(USER), root)
	ldconfig
else
	cd $(LIBDIR) && ln -sf $(REALNAME) $(SONAME)
endif
	cd $(LIBDIR) && ln -sf $(SONAME) $(LINKERNAME)
endif
ifeq ($(UNAME_S),OpenBSD)
	ldconfig -R
endif

-include postmake.make