Allowable characters in some section of gadget.yaml

[Barry Warsaw]

On Feb 03, 2017, at 10:06 AM, Steve Langasek wrote:

>AIUI ubuntu-image will never consume these fields anyway, they're only for
>snapd's use.  Is it better to future-proof ubuntu-image by making it
>maximally permissive on these fields?  snapd parses the gadget.yaml before
>it ever returns it to ubuntu-image, so it's not as if ubuntu-image being
>strict helps us fail early.

That could be reasonable for the u-i implementation, if the contents of the
defaults: section will never be relevant for u-i.  If it's possible u-i will
have to someday act on those contents, then I think it should be stricter,
under the principle that it's easier to relax constraints than tighten them.

Either way, the spec should still be more explicit about what's accepted.

Cheers,
-Barry
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