[new-backend] spec: reimplement to completely comply with hooks

[atmaxinger]

The spec plugin isn't completely conformant with what should be done in the spec hook. When implementig the hook, we decided to not waste too much time on it, just that the basisc work.

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There can be different settings for the conflict handling

• This can probably be removed

Yes, all the conflict handling settings should be removed entirely. During get all conflicts should be warnings during set they should be errors (unless @markus2330 thinks some conflicts should never be errors). That part could be handled from the libelektra-kdb side with the "error blocking trick", so the spec would be the same.

neither assign/condition nor default are processed in set

Not sure about assign/condition and whether we actually want to keep that (@markus2330 ?), but default should definitely be processed in set. See also #4484 (comment)

• set operation sets internal/spec/remove on array
• set removes internal/spec/array/validated
• set does this thing here, I'm not sure what it is

All of the stuff related to array handling is very complicated and weird. Part of the weirdness comes from the fact that on master the spec plugin is only called once during kdbSet and somehow there should still be validation during kdbSet, but also spec should cleanup the copied data (obviously not possible).

See also #2700 and #4061

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However, please don't waste time on this. Like I said already: Just try to imitate what spec does on master. The existing tests obviously also expect this behaviour. Once that is done and merged, you can create another PR with the actual updates for spec (probably after new-backend is merged in master).

Originally posted by @kodebach in #4495 (comment)

[kodebach]

Another important thing is that default:/ keys should be processed in the poststorage phase of kdbGet, currently the are temporarily cut out during that phase.

[atmaxinger]

Yes - See also #4493

[markus2330]

@atmaxinger is this done?

[atmaxinger]

Well as @tmakar has rewritten the spec plugin, I think this is done.

[github-actions]

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