GNUmakefile.in

#  GNUMakefile.in: gwm's global makefile.
#  Copyright (C) 2023 streaksu
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Nuke built-in rules and variables
override MAKEFLAGS += -rR

# Misc autoconf variable imports.
override SRCDIR := @SRCDIR@
override BUILDDIR := @BUILDDIR@
override PACKAGE_VERSION := @PACKAGE_VERSION@
override PACKAGE_TARNAME := @PACKAGE_TARNAME@
override OUTPUT := bin/$(PACKAGE_TARNAME)
override WERROR_FLAG := @WERROR_FLAG@

# Autoconf dir variables.
override prefix := @prefix@
override exec_prefix := @exec_prefix@
override bindir := @bindir@
override sysconfdir := @sysconfdir@

# Macros to make our build system still work from within paths with spaces
# or other special characters.
override SPACE := $(subst ,, )
MKESCAPE = $(subst $(SPACE),\ ,$(1))
SHESCAPE = $(subst ','\'',$(1))
OBJESCAPE = $(subst .a ,.a' ',$(subst .o ,.o' ',$(call SHESCAPE,$(1))))

# File lists.
override CXXFILES := $(shell cd '$(call SHESCAPE,$(SRCDIR))' && find . -type f -name '*.cpp')
override OBJ := $(addprefix $(call MKESCAPE,$(BUILDDIR))/,$(CXXFILES:.cpp=.o))
override HEADER_DEPS := $(CXXFILES:.cpp=.d)

# DEFAULT_VAR definition.
define DEFAULT_VAR =
    ifeq ($(origin $1),default)
        override $(1) := $(2)
    endif
    ifeq ($(origin $1),undefined)
        override $(1) := $(2)
    endif
endef

# Overridable generator executables.
$(eval $(call DEFAULT_VAR,CXX,@CXX@))

# Non-overridable generator executables.
override NATIVE_STRIP := @NATIVE_STRIP@
override MKDIR_P := @MKDIR_P@
override INSTALL := @INSTALL@
override INSTALL_PROGRAM := @INSTALL_PROGRAM@
override INSTALL_DATA    := @INSTALL_DATA@

# User command flags.
$(eval $(call DEFAULT_VAR,CXXFLAGS,@CXXFLAGS@))
$(eval $(call DEFAULT_VAR,CPPFLAGS,@CPPFLAGS@))
$(eval $(call DEFAULT_VAR,LDFLAGS,@LDFLAGS@))
$(eval $(call DEFAULT_VAR,LIBS,@LIBS@))

# Needed command flags.
override CXXFLAGS += \
    -Wall \
    -Wextra \
    $(WERROR_FLAG) \
    -std=gnu++20

override CPPFLAGS := \
	-I'$(call SHESCAPE,$(SRCDIR))/source' \
	$(CPPFLAGS) \
	-DPACKAGE_VERSION=\"$(PACKAGE_VERSION)\" \
	-MMD \
	-MP

# Default target.
.PHONY: all
all: $(OUTPUT)

# Link rules for the final executable.
$(OUTPUT): $(OBJ)
	$(MKDIR_P) bin
	$(CXX) $(CXXFLAGS) $(LDFLAGS) '$(call OBJESCAPE,$^)' $(LIBS) -o $@

# Include header dependencies.
-include $(HEADER_DEPS)

# Compilation rules for *.cpp files.
$(call MKESCAPE,$(BUILDDIR))/%.o: $(call MKESCAPE,$(SRCDIR))/%.cpp
	$(MKDIR_P) "$$(dirname '$(call SHESCAPE,$@)')"
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -c '$(call SHESCAPE,$<)' -o '$(call SHESCAPE,$@)'

# Remove object files and the final executable.
.PHONY: clean
clean:
	rm -rf bin $(OBJ) $(HEADER_DEPS)

# Remove files generated by configure.
.PHONY: distclean
distclean: clean
	rm -rf config.log config.status GNUmakefile

# Create a release tarball.
.PHONY: dist
dist:
	rm -rf "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"
	$(MKDIR_P) "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"
	cp -rp '$(call SHESCAPE,$(SRCDIR))'/.git "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"/
	cd "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)" && git checkout .
	cd "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)" && ./bootstrap
	rm -rf "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"/.git
	rm -rf "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"/.gitignore
	rm -rf "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"/.github
	rm -rf "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"/autom4te.cache
	echo "$(PACKAGE_VERSION)" >"$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"/version
	tar -Jcf "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)".tar.xz "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"
	tar -zcf "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)".tar.gz "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"
	rm -rf "$(PACKAGE_TARNAME)-$(PACKAGE_VERSION)"

# Remove ALL generated files.
.PHONY: maintainer-clean
maintainer-clean: distclean
	cd '$(call SHESCAPE,$(SRCDIR))' && rm -rf configure build-aux *'~' autom4te.cache

# Install files and executables to the final locations.
.PHONY: install
install: all
	$(INSTALL) -d '$(call SHESCAPE,$(DESTDIR)$(bindir))'
	$(INSTALL) -d '$(call SHESCAPE,$(DESTDIR)$(sysconfdir))'
	$(INSTALL_PROGRAM) $(OUTPUT) '$(call SHESCAPE,$(DESTDIR)$(bindir))/'
	$(INSTALL_DATA) '$(call SHESCAPE,$(SRCDIR))/assets'/* '$(call SHESCAPE,$(DESTDIR)$(sysconfdir))/'

# Install and strip executables.
.PHONY: install-strip
install-strip: install
	$(NATIVE_STRIP) '$(call SHESCAPE,$(DESTDIR)$(bindir))'/"$$(basename '$(OUTPUT)')"

# Uninstall previously installed files and executables.
.PHONY: uninstall
uninstall:
	rm -f '$(call SHESCAPE,$(DESTDIR)$(bindir))'/"$$(basename '$(OUTPUT)')"