Include git version in binary build

CMakeLists.txt

@@ -49,6 +49,15 @@ else ( LIBUNWIND_FOUND )
   set( LIBUNWIND_LIBRARIES )
 endif( LIBUNWIND_FOUND )
 
+add_custom_target( invalidate_files ALL
+  COMMAND ${CMAKE_COMMAND} -E touch "${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt" )
+execute_process( OUTPUT_VARIABLE ZBACKUP_VERSION
+  COMMAND git describe --tags --always
+  OUTPUT_STRIP_TRAILING_WHITESPACE )
+if ( ZBACKUP_VERSION )
+  ADD_DEFINITIONS( -DZBACKUP_VERSION="${ZBACKUP_VERSION}" )
+endif( ZBACKUP_VERSION )
+
 file( GLOB sourceFiles "*.cc" )
 add_executable( zbackup ${sourceFiles} ${protoSrcs} ${protoHdrs} )
 

version.cc

@@ -0,0 +1,9 @@
+// Copyright (c) 2012-2014 Konstantin Isakov <[email protected]> and ZBackup contributors, see CONTRIBUTORS
+// Part of ZBackup. Licensed under GNU GPLv2 or later + OpenSSL, see LICENSE
+
+#include <string>
+#ifndef ZBACKUP_VERSION
+std::string zbackup_version( "1.4" );
+#else
+std::string zbackup_version( ZBACKUP_VERSION );
+#endif

version.hh

@@ -0,0 +1,10 @@
+// Copyright (c) 2012-2014 Konstantin Isakov <[email protected]> and ZBackup contributors, see CONTRIBUTORS
+// Part of ZBackup. Licensed under GNU GPLv2 or later + OpenSSL, see LICENSE
+
+#ifndef VERSION_HH_INCLUDED
+#define VERSION_HH_INCLUDED
+#include <string>
+
+extern std::string zbackup_version;
+
+#endif

zbackup.cc

@@ -10,6 +10,7 @@
 #include "backup_collector.hh"
 #include "config.hh"
 #include "utils.hh"
+#include "version.hh"
 
 using std::vector;
 using std::bitset;
@@ -443,7 +444,7 @@ int main( int argc, char *argv[] )
     if ( args.size() < 1 || printHelp )
     {
       fprintf( stderr,
-"ZBackup, a versatile deduplicating backup tool, version 1.4\n"
+"ZBackup, a versatile deduplicating backup tool, version %s\n"
 "Copyright (c) 2012-2014 Konstantin Isakov <[email protected]> and\n"
 "ZBackup contributors\n"
 "Comes with no warranty. Licensed under GNU GPLv2 or later + OpenSSL.\n"
@@ -475,7 +476,7 @@ int main( int argc, char *argv[] )
 "    config [show|edit|set] <storage path> - performs configuration\n"
 "            manipulations (default is show)\n"
 "  For export/import storage path must be a valid (initialized) storage\n"
-"", *argv );
+"", zbackup_version.c_str(), *argv );
       return EXIT_FAILURE;
     }