There's probably a couple of issues here. I'm not 100% due to the crash in pungi-wait-for-signed-ostree-handler.

When there's no changes in a ostree rpm-ostree reports no changes so doesn't supply an updated reference:

No apparent changes since previous commit; use --force-nocache to override

Not updating ref as configured

When this happens pungi-wait-for-signed-ostree-handler crashes where it should actually handle this correctly as its a proper usecase.

COMMAND: pungi-wait-for-signed-ostree-handler ostree


Traceback (most recent call last):

  File "/usr/bin/pungi-wait-for-signed-ostree-handler", line 31, in <module>

    path = '%s/objects/%s/%s.commitmeta' % (repo, commit[:2], commit[2:])

TypeError: 'NoneType' object is not subscriptable

This then causes errors in the pungi global log:

2018-09-13 07:56:04 [WARNING ] Failed to invoke notification script.

2018-09-13 07:56:04 [INFO    ] [DONE ] OSTree phase for variant IoT, arch x86_64 (task id: 29644546)

2018-09-13 08:00:14 [ERROR   ] Unable to find commitid file

I don't know if the last "Unable to find commitid file" is as a result of the above crash but if there's no updates there won't be a commitid file so it should be handled gracefully too if it's difference to the above crash because it's also expected.