TypeError exception when running kolla-build with --template-only

[Christian Berendt]

After the merge of https://review.openstack.org/322115 (https://bugs.launchpad.net/kolla/+bug/1578404) I got the following error when running kolla-build with the parameter --template-only:

kolla-build --config-file kolla-build.conf --template-only neutron
INFO:kolla.cmd.build:Found the docker image folder at /usr/local/share/kolla/docker
INFO:kolla.cmd.build:Dockerfiles are generated in /tmp/kolla-2016-05-31_16-31-59_ctuce_/docker
Traceback (most recent call last):
  File "/usr/local/bin/kolla-build", line 10, in <module>
    sys.exit(main())
  File "/usr/local/lib/python2.7/dist-packages/kolla/cmd/build.py", line 795, in main
    bad_results, good_results, unmatched_results = run_build()
TypeError: 'NoneType' object is not iterable

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/323505

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/323505
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=b3e8ac8371a497aed6270358062cdfe4952a37ae
Submitter: Jenkins
Branch: master

commit b3e8ac8371a497aed6270358062cdfe4952a37ae
Author: Mark Goddard <email address hidden>
Date: Tue May 31 12:01:06 2016 -0500

    Don't always unpack image build results tuple, as it may be None

    Change-Id: I21b1327da1de1bd3cc3018ba37715b0a19c1dbef
    Closes-Bug: #1587501

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/kolla 3.0.0.0b1 development milestone.