From 1a04ae51251da727cb24dc511e5a35eda8fdd108 Mon Sep 17 00:00:00 2001
From: Roland Kaufmann <roland.kaufmann@uni.no>
Date: Wed, 31 Jul 2013 15:08:51 +0200
Subject: [PATCH] Make project buildable also without Git

If Git is not found, revert to just dumping the label into the code.
(We currently have no way of getting the SHA into the tarball).
---
 cmake/Modules/UseVersion.cmake | 38 +++++++++++++++++++++-------------
 1 file changed, 24 insertions(+), 14 deletions(-)

diff --git a/cmake/Modules/UseVersion.cmake b/cmake/Modules/UseVersion.cmake
index c1815fd0..541784cc 100644
--- a/cmake/Modules/UseVersion.cmake
+++ b/cmake/Modules/UseVersion.cmake
@@ -23,19 +23,29 @@ else ()
 	find_package (Git)
   endif ()
 
-  add_custom_target (update-version ALL
-	COMMAND ${CMAKE_COMMAND}
-	-DCMAKE_HOME_DIRECTORY=${CMAKE_HOME_DIRECTORY}
-	-DGIT_EXECUTABLE=${GIT_EXECUTABLE}
-	-DPROJECT_SOURCE_DIR=${PROJECT_SOURCE_DIR}
-	-DPROJECT_BINARY_DIR=${PROJECT_BINARY_DIR}
-	-DPROJECT_LABEL=${${project}_LABEL}
-	-P ${PROJECT_SOURCE_DIR}/cmake/Scripts/WriteVerSHA.cmake
-	COMMENT "Updating version information"
-	)
+  # if git is *still* not found means it is not present on the
+  # system, so there is "no" way we can update the SHA. notice
+  # that this is a slightly different version of the label than
+  # above.
+  if (NOT GIT_FOUND)
+	file (WRITE "${PROJECT_BINARY_DIR}/project-version.h"
+	  "#define PROJECT_VERSION \"${${project}_LABEL}\"\n"
+	  )
+  else ()
+	add_custom_target (update-version ALL
+	  COMMAND ${CMAKE_COMMAND}
+	  -DCMAKE_HOME_DIRECTORY=${CMAKE_HOME_DIRECTORY}
+	  -DGIT_EXECUTABLE=${GIT_EXECUTABLE}
+	  -DPROJECT_SOURCE_DIR=${PROJECT_SOURCE_DIR}
+	  -DPROJECT_BINARY_DIR=${PROJECT_BINARY_DIR}
+	  -DPROJECT_LABEL=${${project}_LABEL}
+	  -P ${PROJECT_SOURCE_DIR}/cmake/Scripts/WriteVerSHA.cmake
+	  COMMENT "Updating version information"
+	  )
 
-  # the target above gets built every time thanks to the "ALL" modifier,
-  # but it must also be done before the main library so it can pick up
-  # any changes it does.
-  add_dependencies (${${project}_TARGET} update-version)
+	# the target above gets built every time thanks to the "ALL" modifier,
+	# but it must also be done before the main library so it can pick up
+	# any changes it does.
+	add_dependencies (${${project}_TARGET} update-version)
+  endif ()
 endif ()