Use config.def.h instead of config.h

Since config.h is destined to be modified by the end-user, I think it
is better to adopt what suckless usually does and move config.h to
config.def.h. This file is sort of a template from which the end-user
can build their own config.h that won’t be tracked by git.

If config.h doesn’t exist at compile-time, the makefile will
automatically copy it from the template.

.gitignore

@@ -0,0 +1 @@
+/config.h

makefile

@@ -1,3 +1,4 @@
+# -*- indent-tabs-mode: t -*-
 CC       = cc
 CFLAGS   = `pkg-config --cflags gtk4 webkit2gtk-5.0 x11`
 LIBS     = `pkg-config --libs gtk4 webkit2gtk-5.0 x11`
@@ -18,10 +19,15 @@ OPTIONS  = -Dgtk_doc=false -Dintrospection=false \
 
 PREFIX=/usr/local
 
-all:
+all: config.h rose
+
+rose:
 	$(CC) -fPIC -O3 -o rose *.c $(CFLAGS) $(LIBS) $(OPTIONS)
 	strip ./rose
 
+config.h:
+	[ -f "$@" ] || cp config.def.h $@
+
 install: all
 	cp -f ./rose $(PREFIX)/bin/rose
 	cp -f ./scripts/dmenu_rose.sh $(PREFIX)/bin/dmenu_rose
@@ -32,8 +38,11 @@ uninstall:
 clean:
 	rm -f rose compile_flags.txt
 
+clean-all: clean
+	rm -f config.h
+
 flags:
 	echo $(CFLAGS) | sed 's/ /\n/g' > compile_flags.txt
 
-.PHONY: all clean install uninstall flags
+.PHONY: all clean clean-all install uninstall flags config.h
-.SILENT: all clean install uninstall flags
+.SILENT: all clean clean-all install uninstall flags config.h