Remove GetGitRevisionDescription.cmake

CMakeLists.txt

@@ -25,24 +25,28 @@ if(EXISTS ${PROJECT_SOURCE_DIR}/.git)
         find_package(Git)
 
         if(GIT_FOUND)
-            include(GetGitRevisionDescription)
-            get_git_tag_revision(TAGHASH --tags --max-count=1)
-            get_git_head_revision(REFSPEC COMMITHASH)
-            git_describe(VERSION --tags ${TAGHASH})
-
-            string(REGEX MATCH "^openmw-[^0-9]*[0-9]+\\.[0-9]+\\.[0-9]+.*" MATCH "${VERSION}")
-            if(MATCH)
-                string(REGEX REPLACE "^openmw-([0-9]+)\\..*" "\\1" GIT_VERSION_MAJOR "${VERSION}")
-                string(REGEX REPLACE "^openmw-[0-9]+\\.([0-9]+).*" "\\1" GIT_VERSION_MINOR "${VERSION}")
-                string(REGEX REPLACE "^openmw-[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" GIT_VERSION_RELEASE "${VERSION}")
-
+            execute_process (
+                COMMAND "${GIT_EXECUTABLE}" rev-list --tags --max-count=1
+                WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
+                RESULT_VARIABLE EXITCODE1
+                OUTPUT_VARIABLE TAGHASH
+                OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+            execute_process (
+                COMMAND "${GIT_EXECUTABLE}" rev-parse HEAD
+                WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
+                RESULT_VARIABLE EXITCODE2
+                OUTPUT_VARIABLE COMMITHASH
+                OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+            string (COMPARE EQUAL "${EXITCODE1}:${EXITCODE2}" "0:0" SUCCESS)
+            if (SUCCESS)
                 set(OPENMW_VERSION_COMMITHASH "${COMMITHASH}")
                 set(OPENMW_VERSION_TAGHASH "${TAGHASH}")
-
                 message(STATUS "OpenMW version ${OPENMW_VERSION}")
-            else(MATCH)
+            else (SUCCESS)
                 message(WARNING "Failed to get valid version information from Git")
-            endif(MATCH)
+            endif (SUCCESS)
         else(GIT_FOUND)
             message(WARNING "Git executable not found")
         endif(GIT_FOUND)