Add --output option to Swarming client and pass it through to the bot

appengine/swarming/server/task_request.py

Index: appengine/swarming/server/task_request.py
diff --git a/appengine/swarming/server/task_request.py b/appengine/swarming/server/task_request.py
index ce1aea5f9ec26c6ca69e5b5fdf21adc1ea170463..d3eb8d1d307b69e8d2b6988f467a2c2884ed9a97 100644
--- a/appengine/swarming/server/task_request.py
+++ b/appengine/swarming/server/task_request.py
@@ -420,6 +420,11 @@ class TaskProperties(ndb.Model):
   # task.
   idempotent = ndb.BooleanProperty(default=False, indexed=False)
 
+  # A list of outputs expected. If empty, all files written to
+  # $(ISOLATED_OUTDIR) will be returned; otherwise, the files in this list
+  # will be added to those in that directory.

[M-A Ruel, 2016/10/26 18:47:32]

# The path must be in posix form.

You must add a validator. See the path validator above for example. 

+  outputs = ndb.StringProperty(repeated=True, indexed=False)
+
   @property
   def is_terminate(self):
     """If True, it is a terminate request."""