makefile: revamp prepare/install

Instead of changing the script in place, store them as .in files, which
are passed through sed prior to install.

Steal some automake magic to pretty up the output
Signed-off-by: Dave Reisner <dreisner@archlinux.org>

.gitignore

+/abs
+/makeworld
+/scripts/svn2abs

Makefile

@@ -5,6 +5,13 @@ CONFDIR = /etc/
 PROTOTYPEDIR = /usr/share/pacman/
 BUILDDIR = build/
 
+scripts = \
+	abs \
+	makeworld \
+	scripts/svn2abs
+
+all: $(scripts)
+
 #### Output formatting ####
 SPC  = \x20
 RST  = \e[0m
@@ -16,22 +23,28 @@ IND2 = $(YLW)$(SPC)=>$(SPC)$(RST)
 MSG1 = $(IND1)$(BOLD)$(1)$(SPC)$(IND1)
 MSG2 = $(IND2)$(BOLD)$(1)$(RST)
 
-.PHONY: prepare
-prepare:
-	@echo -e "$(call MSG1,Prepare abs for install)"
-	@echo -e "$(call MSG2,Setting version)"
-	@echo -e "$(call MSG2,Setting configuration directory )"
-	@sed -i -e 's#%%ABS_VERSION%%#$(ABS_VERSION)#g' \
-		-e 's#%%CONF_DIR%%#$(CONFDIR)#g' \
-		abs makeworld scripts/svn2abs
+V_GEN = $(_v_GEN_$(V))
+_v_GEN_ = $(_v_GEN_0)
+_v_GEN_0 = @echo "  GEN     " $@;
+_v_GEN_1 =
+
+%: %.in
+	$(edit) $<
+	@chmod 755 $@
+
+edit = \
+	$(V_GEN) sed \
+	-e 's,%%CONF_DIR%%,$(CONFDIR),g' \
+	-e 's,%%ABS_VERSION%%,$(ABS_VERSION),g' \
+	< $< > $@ || rm $@
 
 .PHONY: install
-install:
+install: $(scripts)
 	@echo -e "$(call MSG1,abs install)"
 	@echo -e "$(call MSG2,Installing scripts into $(DESTDIR)$(BINDIR))"
 	@mkdir -p $(DESTDIR)$(BINDIR)
-	@install -m 755 abs $(DESTDIR)$(BINDIR)
-	@install -m 755 makeworld $(DESTDIR)$(BINDIR)
+	@install -m755 abs $(DESTDIR)$(BINDIR)
+	@install -m755 makeworld $(DESTDIR)$(BINDIR)
 	@echo -e "$(call MSG2,Installing abs configuration file into $(DESTDIR)$(CONFDIR))"
 	@mkdir -p $(DESTDIR)$(CONFDIR)
 	@install -m 644 conf/abs.conf $(DESTDIR)$(CONFDIR)
@@ -97,3 +110,6 @@ dist:
 	@tar czf abs-$(ABS_VERSION).tar.gz $(BUILDDIR) --transform="s#^$(BUILDDIR)*#abs/#"
 	@echo -e "$(call MSG2,Removing build directory)"
 	@rm -rf $(BUILDDIR)
+
+clean:
+	$(RM) $(scripts)