[MERGE][bug #300177] Pass compression_parent as part of 'get_record_stream'

[John Arbash Meinel]

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Jelmer Vernooij wrote:
> Jelmer Vernooij has voted comment.
> Status is now: Semi-approved
> Comment:
> It would indeed be nice if this could be specific to KnitContentFactory
> rather than for all ContentFactory's, since that means no API changes
> for foreign implementations.
> 
> For details, see:
> http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C498CB306.30201%40arbash-meinel.com%3E
> 
> Project: Bazaar
> 
> 

Well, the base level ContentFactory implements "compression_parents =
None", so at least implementations that inherit from that wouldn't have
to change.

I still haven't heard a great way to actually solve this. If I make it
an API on ContentFactory then the same argument applies. It is either
that or change "insert_record_stream" to do "getattr()" logic, which
seems a bit overkill.

In essence, we need *some* way to determine if a record refers to
another record before it can be properly extracted to a fulltext. We
don't currently have that (well we do, but infer it from a list of known
types, which is a *worse* solution IMO).

John
=:->

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