patch and restore system

.gitignore

@@ -0,0 +1,11 @@
+# dist
+dwm
+*.tar*
+
+# generated files
+config.h
+
+# patch
+*.unpatched
+*.orig
+*.rej

Makefile

@@ -20,14 +20,14 @@ options:
 
 ${OBJ}: config.h config.mk
 
-config.h:
+config.h: patch
 	cp config.def.h $@
 
-dwm: ${OBJ} patch
+dwm: ${OBJ}
 	${CC} -o $@ ${OBJ} ${LDFLAGS}
 
-clean:
-	rm -f dwm ${OBJ} dwm-${VERSION}.tar.gz
+clean: restore
+	rm -f dwm ${OBJ} dwm-${VERSION}.tar.gz *.rej $.orig
 
 dist: clean
 	mkdir -p dwm-${VERSION}
@@ -49,7 +49,14 @@ uninstall:
 	rm -f ${DESTDIR}${PREFIX}/bin/dwm\
 		${DESTDIR}${MANPREFIX}/man1/dwm.1
 
-patch: patches/*.diff
+orig:
+	find . -iname '*.[ch]' -exec sh -c 'cp $$0 $$0.unpatched' {} \;
+
+restore:
+	find . -iname '*.unpatched'  \
+		-exec sh -c 'mv $$0 "$${0%.unpatched}"' {} \;
+
+patch: orig
 	find ${PATCHESDIR} -iname '*.diff' -exec sh -c 'patch < $$0' {} \;
 
-.PHONY: all options clean dist install uninstall
+.PHONY: all options clean dist install uninstall orig patch restore