--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make-rules/prep-git.mk	Mon Apr 27 10:19:50 2015 -0500
@@ -0,0 +1,77 @@
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License (the "License").
+# You may not use this file except in compliance with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or http://www.opensolaris.org/os/licensing.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+# Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
+#
+
+GIT =		/usr/bin/git
+
+#
+# Anything that we pull from a GIT repo must have a GIT_REPO{_[0-9]+} and
+# GIT_COMMIT_ID{_[0-9]+} to match.
+#
+
+TMP_SUFFIXES = $(subst GIT_REPO_,, $(filter GIT_REPO_%, $(.VARIABLES)))
+
+define git-rules
+ifdef GIT_REPO$(1)
+ifdef GIT_COMMIT_ID$(1)
+
+COMPONENT_SRC$(1) = $(COMPONENT_NAME)-$(COMPONENT_VERSION)-$$(GIT_COMMIT_ID$(1))
+COMPONENT_ARCHIVE$(1) = $$(COMPONENT_SRC$(1)).tar.gz
+
+CLEAN_PATHS += $$(COMPONENT_SRC$(1))
+CLOBBER_PATHS += $$(COMPONENT_ARCHIVE$(1))
+SOURCE_DIR$(1) = $$(COMPONENT_DIR)/$(COMPONENT_SRC$(1))
+
+download::	$$(USERLAND_ARCHIVES)$$(COMPONENT_ARCHIVE$(1))
+
+# First attempt to download a cached archive of the SCM repo at the proper
+# changeset ID.  If that fails, create an archive by cloning the SCM repo,
+# updating to the selected changeset, archiving that directory, and cleaning up
+# when complete.
+$$(USERLAND_ARCHIVES)$$(COMPONENT_ARCHIVE$(1)):	$(MAKEFILE_PREREQ)
+	$$(FETCH) --file $$@ $$(GIT_HASH$(1):%=--hash %) || \
+	(TMP_REPO=$$$$(mktemp --directory) && \
+	 $(GIT) clone $$(GIT_REPO$(1)) $$$${TMP_REPO} && \
+	 (cd $$$${TMP_REPO} ; $(GIT) checkout \
+		 $$(GIT_COMMIT_ID$(1))) && \
+	 (cd $$$${TMP_REPO} ; $(GIT) archive --format tar.gz \
+		--prefix $$(COMPONENT_SRC$(1))/ \
+		$$(GIT_COMMIT_ID$(1))) > $$@ && \
+	 $(RM) -r $$$${TMP_REPO} && \
+	 GIT_HASH=$$$$(digest -a sha256 $$@) && \
+	 $(GSED) -i \
+		-e "s/^GIT_HASH$(1)=.*/GIT_HASH$(1)=  sha256:$$$${GIT_HASH}/" \
+		Makefile)
+
+
+REQUIRED_PACKAGES += developer/versioning/git
+
+endif
+endif
+endef
+
+#
+# Define the rules required to download any source archives and augment any
+# cleanup macros.
+#
+$(eval $(call git-rules,))
+$(foreach suffix, $(TMP_SUFFIXES), $(eval $(call git-rules,_$(suffix))))