packages: distribute mroonga source under packages.groonga.org

GitHub plans to stop downloadable source code archives.
See https://github.com/blog/1302-goodbye-uploads about details.

configure.ac

@@ -366,6 +366,7 @@ AC_CONFIG_FILES([
   packages/rpm/fedora/Makefile
   packages/yum/Makefile
   packages/apt/Makefile
+  packages/source/Makefile
   tools/Makefile
   doc/Makefile
   doc/locale/Makefile

packages/Makefile.am

@@ -1,4 +1,5 @@
 SUBDIRS =					\
 	apt					\
 	rpm					\
+	source					\
 	yum

packages/source/Makefile.am

@@ -0,0 +1,19 @@
+all:
+
+release: upload
+
+ensure-rsync-path:
+	@if test -z "$(RSYNC_PATH)"; then				\
+	  echo "--with-rsync-path configure option must be specified.";	\
+	  false;							\
+	fi
+
+download: ensure-rsync-path
+	rsync -avz --progress $(RSYNC_PATH)/source/mroonga/ files
+
+upload: ensure-rsync-path files/$(PACKAGE)-$(VERSION).tar.gz
+	rsync -avz --progress --delete files/ $(RSYNC_PATH)/source/mroonga
+
+files/$(PACKAGE)-$(VERSION).tar.gz: $(top_builddir)/$(PACKAGE)-$(VERSION).tar.gz
+	mkdir -p files
+	cp -p $< $@