src/bin/sage-venv-config: Import VERSION from sage.version

Author: Matthias Koeppe

src/bin/sage-venv-config

@@ -2,13 +2,20 @@
 #  this interpreter will be replaced by the interpreter in the venv
 #  during installation.
 
+VERSION = 'unknown'
+
 try:
     from sage_conf import *
 except ImportError:
     pass
 
 from sys import prefix as SAGE_VENV
 
+try:
+    from sage.version import version as VERSION
+except ImportError:
+    pass
+
 def _main():
     from argparse import ArgumentParser
     from sys import exit, stdout