Changed: Allow to put a "revision" file in root directory if .hg directory is not present

code/CMakeModules/GetRevision.cmake

@@ -19,6 +19,7 @@ IF(SOURCE_DIR)
     SET(SOURCE_DIR ${ROOT_DIR})
   ENDIF(NOT SOURCE_DIR AND ROOT_DIR)
 ELSE(SOURCE_DIR)
+  SET(SOURCE_DIR ${CMAKE_SOURCE_DIR})
   SET(ROOT_DIR ${CMAKE_SOURCE_DIR})
 ENDIF(SOURCE_DIR)
 
@@ -57,6 +58,15 @@ IF(EXISTS "${ROOT_DIR}/.hg/")
   ENDIF(MERCURIAL_FOUND)
 ENDIF(EXISTS "${ROOT_DIR}/.hg/")
 
+# if processing exported sources, use "revision" file if exists
+IF(SOURCE_DIR AND NOT DEFINED REVISION)
+  SET(REVISION_FILE ${SOURCE_DIR}/revision)
+  IF(EXISTS ${REVISION_FILE})
+    FILE(STRINGS ${REVISION_FILE} REVISION LIMIT_COUNT 1)
+    MESSAGE(STATUS "Read revision ${REVISION} from file")
+  ENDIF(EXISTS ${REVISION_FILE})
+ENDIF(SOURCE_DIR AND NOT DEFINED REVISION)
+
 IF(SOURCE_DIR AND DEFINED REVISION)
   IF(EXISTS ${SOURCE_DIR}/revision.h.in)
     MESSAGE(STATUS "Revision: ${REVISION}")