+# If not in a Git repo try to read GIT_HEAD and GIT_DESCRIBE from
+# enviroment
+if (NOT GIT_HEAD OR NOT GIT_DESCRIBE)
+ if (ENV_GIT_HEAD)
+ set(GIT_HEAD ${ENV_GIT_HEAD})
+ endif ()
+ if (ENV_GIT_DESCRIBE)
+ set(GIT_DESCRIBE ${ENV_GIT_DESCRIBE})
+ endif()
+endif()
+