Don't recurse the whole tree looking for a git dir, use PROJECT_SOURCE_DIR

diff --git a/cmake/modules/GetGitRevisionDescription.cmake b/cmake/modules/GetGitRevisionDescription.cmake
index c8d27f2e8ce494c96404086ce58982239916a44c..1f9005b69fd7a8e8f9496f2f3fea991114e0bdcf 100644 (file)
--- a/cmake/modules/GetGitRevisionDescription.cmake
+++ b/cmake/modules/GetGitRevisionDescription.cmake
@@ -40,26 +40,12 @@ set(__get_git_revision_description YES)
 get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
 
 function(get_git_head_revision _refspecvar _hashvar)
-       set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
-       set(GIT_DIR "${GIT_PARENT_DIR}/.git")
-       while(NOT EXISTS "${GIT_DIR}")  # .git dir not found, search parent directories
-               set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}")
-               get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH)
-               if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT)
-                       # We have reached the root directory, we are not in git
-                       set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
-                       set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
-                       return()
-               endif()
-               set(GIT_DIR "${GIT_PARENT_DIR}/.git")
-       endwhile()
-       # check if this is a submodule
-       if(NOT IS_DIRECTORY ${GIT_DIR})
-               file(READ ${GIT_DIR} submodule)
-               string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule})
-               get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH)
-               get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE)
-       endif()
+        set(GIT_DIR "${PROJECT_SOURCE_DIR}/.git")
+        if (NOT EXISTS "${GIT_DIR}")   # .git dir not found, search parent directories
+            set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
+            set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
+            return()
+        endif()
        set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")
        if(NOT EXISTS "${GIT_DATA}")
                file(MAKE_DIRECTORY "${GIT_DATA}")