F OpenNebula#3016: Add git version into oned -v (OpenNebula#3071)

SConstruct

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # -------------------------------------------------------------------------- #
 # Copyright 2002-2019, OpenNebula Project, OpenNebula Systems                #
 #                                                                            #
@@ -19,6 +20,14 @@ import sys
 import shutil
 sys.path.append("./share/scons")
 from lex_bison import *
+from subprocess import Popen,PIPE,STDOUT
+
+# Get git version
+try:
+    out = Popen(["git", "describe", "--dirty", "--always", "--abbrev=8"],stdout=PIPE)
+    git_version = out.communicate()[0].rstrip()
+except OSError:
+    git_version = "not known"
 
 # This is the absolute path where the project is located
 cwd = os.getcwd()
@@ -27,6 +36,8 @@ cwd = os.getcwd()
 main_env = Environment()
 main_env['ENV']['PATH'] = os.environ['PATH']
 
+main_env['CXXFLAGS'] = " -DGITVERSION=\'\"" + git_version + "\"\'"
+
 # snippet borrowed from http://dev.gentoo.org/~vapier/scons-blows.txt
 # makes scons aware of build related environment variables
 if os.environ.has_key('CC'):

include/Nebula.h

@@ -353,7 +353,11 @@ class Nebula
      */
     static string version()
     {
-        return "OpenNebula " + code_version();
+       ostringstream os;
+       os << "OpenNebula " << code_version();
+       os << " (" << GITVERSION << ")";
+
+       return os.str();
     };
 
     /**