diff -r 000000000000 -r 6474c204b198 config/makefiles/rcs.mk
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/config/makefiles/rcs.mk	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+# -*- makefile -*-
+# vim:set ts=8 sw=8 sts=8 noet:
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+ifdef USE_RCS_MK #{
+
+ifndef INCLUDED_RCS_MK #{
+
+MOZ_RCS_TYPE_HG ?= $(notdir $(wildcard $(topsrcdir)/.hg))
+MOZ_RCS_TYPE_GIT ?= $(notdir $(wildcard $(topsrcdir)/.git))
+
+
+###########################################################################
+# HAVE_MERCURIAL_RCS
+###########################################################################
+ifeq (.hg,$(MOZ_RCS_TYPE_HG)) #{
+
+# Intent: Retrieve the http:// repository path for a directory.
+# Usage: $(call getSourceRepo[,repo_dir|args])
+# Args:
+#   path (optional): repository to query.  Defaults to $(topsrcdir)
+getSourceRepo = \
+  $(call FUNC_getSourceRepo,$(if $(1),cd $(1) && hg,hg --repository $(topsrcdir)))
+
+# return: http://hg.mozilla.org/mozilla-central
+FUNC_getSourceRepo = \
+  $(strip \
+    $(patsubst %/,%,\
+    $(patsubst ssh://%,http://%,\
+    $(firstword $(shell $(getargv) showconfig paths.default))\
+    )))
+
+#} HAVE_MERCURIAL_RCS
+
+###########################################################################
+# HAVE_GIT_RCS
+###########################################################################
+else ifeq (.git,$(MOZ_RCS_TYPE_GIT)) #{
+
+GIT ?= git
+getSourceRepo = \
+  $(shell cd $(topsrcdir) && $(GIT) rev-parse --verify HEAD)
+
+endif #} HAVE_GIT_RCS
+
+
+INCLUDED_RCS_MK := 1
+endif #}
+
+endif #}