# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@logilab.fr>
# Date 1287135636 -7200
# Node ID ac4cecb26813f43b1033f0c7a48b53cc969b86e6
# Parent  88b3172eb7c74673400d0c7d97160b8d40f5754d
[distribution] Handle missing instance directory when listing and running instance command.

no directory means no available instance.

diff -r 88b3172eb7c7 -r ac4cecb26813 cwctl.py
--- a/cwctl.py	Fri Oct 15 11:39:54 2010 +0200
+++ b/cwctl.py	Fri Oct 15 11:40:36 2010 +0200
@@ -63,7 +63,10 @@
         raise ExecutionError('can\'t kill process %s' % pid)
 
 def list_instances(regdir):
-    return sorted(idir for idir in listdir(regdir) if isdir(join(regdir, idir)))
+    if isdir(regdir):
+        return sorted(idir for idir in listdir(regdir) if isdir(join(regdir, idir)))
+    else:
+        return []
 
 def detect_available_modes(templdir):
     modes = []