Using yaql task function with non existing task results in IndexError

[Moshe Elisha]

Using the "task" YAQL function and passing a non existing task name should result in a better user facing error message.

Executing the following workflow:

---
version: '2.0'

wf:
  type: direct
  output:
    task_name: <% task(non_existing_task).name %>

  tasks:
    task1:
      action: std.noop

Will result in:

  File "/usr/lib/python2.7/site-packages/mistral/utils/yaql_utils.py", line 69, in task_
    task_ex = task_execs[-1]
IndexError: list index out of range

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/251130

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/251130
Committed: https://git.openstack.org/cgit/openstack/mistral/commit/?id=255fb91ad507c4f5234559ae62fb5325c2ed90c8
Submitter: Jenkins
Branch: master

commit 255fb91ad507c4f5234559ae62fb5325c2ed90c8
Author: Moshe Elisha <email address hidden>
Date: Sun Nov 29 13:40:23 2015 +0000

    Improve error message for YAQL task function

    Improve the error message in case a non existing task name is passed
    to the "task" YAQL function

    Change-Id: I93a33365779ba2a5301431c6769697d8b4861fae
    Closes-Bug: 1520930

[Thierry Carrez (ttx)]

This issue was fixed in the openstack/mistral 2.0.0.0b1 development milestone.