[PATCH] python version check

[Fredrik Lundh]

> here's a patch for the bzr start script that checks the python version.  if
> the current interpreter is older than 2.3, it attempts to hand control over
> to a more modern interpreter.
> 
> this has been tested with 1.5.2 and newer.
> 
> (feel free to improve the error message, btw)
> 
> enjoy! /F 

*** modified file 'bzr'
--- bzr 
+++ bzr 
@@ -17,9 +17,23 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
-import sys, bzrlib, bzrlib.commands
+import os, sys
 
+try:
+    version_info = sys.version_info
+except AttributeError:
+    version_info = 1, 5 # 1.5 or older
+
+if version_info < (2, 3):
+    for python in 'python2.4', 'python2.3':
+        try:
+            os.execvp(python, [python] + sys.argv)
+        except OSError:
+            pass
+    print "***", "cannot find a suitable python interpreter"
+    sys.exit(1)
+
+import bzrlib, bzrlib.commands
 
 if __name__ == '__main__':
     sys.exit(bzrlib.commands.main(sys.argv))
-