contrib: use a separate build rule for bash scripts

Treat bash scripts separately from the others to allow for a different
build rule, which is reused from the scripts/ subdir.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>

contrib/Makefile.am

@@ -4,16 +4,22 @@ AUTOMAKE_OPTIONS = std-options
 bin_SCRIPTS = \
   $(OURSCRIPTS)
 
-OURSCRIPTS = \
+BASHSCRIPTS = \
 	bacman \
 	paccache \
 	pacdiff \
 	paclist \
 	paclog-pkglist \
 	pacscripts \
-	pacsearch \
 	pacsysclean
 
+OTHERSCRIPTS = \
+	pacsearch
+
+OURSCRIPTS = \
+	$(BASHSCRIPTS) \
+	$(OTHERSCRIPTS)
+
 OURFILES = \
 	bash_completion \
 	zsh_completion
@@ -50,12 +56,17 @@ edit = sed \
 	-e 's|@SIZECMD[@]|$(SIZECMD)|g' \
 	-e '1s|!/bin/bash|!$(BASH_SHELL)|g'
 
-$(OURSCRIPTS): Makefile
+$(OTHERSCRIPTS): Makefile
 	$(AM_V_at)$(RM) $@ $@.tmp
 	$(AM_V_GEN)$(edit) $(srcdir)/$@.in >$@.tmp
 	$(AM_V_at)chmod +x,a-w $@.tmp
 	$(AM_V_at)mv $@.tmp $@
 
+$(BASHSCRIPTS): Makefile
+	$(AM_V_at)$(RM) $@
+	$(AM_V_GEN)test -f $(srcdir)/$@.in && m4 -P -I $(srcdir) $(srcdir)/$@.in | $(edit) >$@
+	$(AM_V_at)chmod +x,a-w $@
+
 $(OURFILES): Makefile
 	$(AM_V_at)$(RM) $@ $@.tmp
 	$(AM_V_GEN)$(edit) $(srcdir)/$@.in >$@.tmp