gnome: print client version and git ref in log

Refs #75395

Change-Id: I8b53f19f4c3015a7e2497f6904bd1c4ce76d145f
diff --git a/cmake/GitRevision.cmake b/cmake/GitRevision.cmake
new file mode 100644
index 0000000..fe0474b
--- /dev/null
+++ b/cmake/GitRevision.cmake
@@ -0,0 +1,51 @@
+#  Copyright (C) 2015 Savoir-faire Linux Inc.
+#  Author: Stepan Salenikovich <stepan.salenikovich@savoirfairelinux.com>
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
+#
+#  Additional permission under GNU GPL version 3 section 7:
+#
+#  If you modify this program, or any covered work, by linking or
+#  combining it with the OpenSSL project's OpenSSL library (or a
+#  modified version of that library), containing parts covered by the
+#  terms of the OpenSSL or SSLeay licenses, Savoir-faire Linux Inc.
+#  grants you additional permission to convey the resulting work.
+#  Corresponding Source for a non-source form of such a combination
+#  shall include the source code for the parts of OpenSSL used as well
+#  as that of the covered work.
+#
+
+FIND_PACKAGE(Git)
+
+IF(GIT_FOUND)
+   EXECUTE_PROCESS(
+      COMMAND ${GIT_EXECUTABLE} rev-parse --verify HEAD
+      OUTPUT_VARIABLE RING_CLIENT_REVISION
+      OUTPUT_STRIP_TRAILING_WHITESPACE
+   )
+ENDIF()
+
+IF( "${RING_CLIENT_REVISION}" STREQUAL "")
+   SET(RING_CLIENT_REVISION "unknown")
+ENDIF()
+
+MESSAGE( STATUS "GIT_REVISION_INPUT_FILE: " ${GIT_REVISION_INPUT_FILE} )
+MESSAGE( STATUS "GIT_REVISION_OUTPUT_FILE: " ${GIT_REVISION_OUTPUT_FILE} )
+
+# generate revision.h file
+CONFIGURE_FILE (
+   ${GIT_REVISION_INPUT_FILE}
+   ${GIT_REVISION_OUTPUT_FILE}
+)