Can resources be optional?

[Matt Bruzek]

We are developing a charm with our partners that takes 2 resources.

One of the resources is optional but the charm publish commands requires both resources.

charm push cs:~kwmonroe/trusty/ibm-im
charm publish cs:~kwmonroe/trusty/ibm-im-0
ERROR cannot publish charm or bundle: bad request: charm published with incorrect resources: resources are missing from publish request: ibm_im_fixpack, ibm_im_installer

Is there any way of making some resources optional? I discussed this with cmars and wallyworld in #juju. We talked about an "optional" tag in the metadata.yaml. Are there any other ideas?

[Richard Harding (rharding)]

The charmstore requires that to publish a charm with resources you must supply at least a dummy resource so that any time a user is to juju deploy XXX it's expected to work with the dummy placeholder resource.

An example would be the django charm. It should ship with a hello world application so that tests can run, the charm can be deployed, etc. All of that works without requiring the user to provide something locally in the right format from their machine which they might not have.

[Matt Bruzek (mbruzek)]

Thanks for the response rharding. I wonder if that will be obvious to users who will want to use resources and run into this issue as I have. I can envision users having optional resources or may not have resources for all architectures at the time of charm publish.