Added custom error.

vcsserver/exceptions.py

@@ -53,6 +53,12 b' def ArchiveException(org_exc=None):'
     return _make_exception_wrapper
 
 
+def ClientNotSupportedException(org_exc=None):
+    def _make_exception_wrapper(*args):
+        return _make_exception('client_not_supported', org_exc, *args)
+    return _make_exception_wrapper
+
+
 def LookupException(org_exc=None):
     def _make_exception_wrapper(*args):
         return _make_exception('lookup', org_exc, *args)

vcsserver/hooks.py

@@ -167,6 +167,8 b' def _handle_exception(result):'
 
     if exception_class == 'HTTPLockedRC':
         raise exceptions.RepositoryLockedException()(*result['exception_args'])
+    elif exception_class == 'ClientNotSupportedError':
+        raise exceptions.ClientNotSupportedException()(*result['exception_args'])
     elif exception_class == 'HTTPBranchProtected':
         raise exceptions.RepositoryBranchProtectedException()(*result['exception_args'])
     elif exception_class == 'RepositoryError':