Re: [PATCH 0/5] cache API: always have a "istate->repo"

> The "struct index_state" contains a "repo" member, which should be a
> pointer to the repository for that index, but which due to us
> constructing such structs on an ad-hoc basis in various places wasn't
> always available.
> 
> We'd thus end up with code like this, in the recent
> ds/omit-trailing-hash-in-index topic:
> 
> 	struct repository *r = istate->repo ? istate->repo : the_repository;
> 
> Really we should be able to trust the "istate->repo", but were
> carrying those sorts of conditionals because our index might come from
> a manually constructed source, so we'd have to fall back to
> "the_repository".
> 
> This series changes the relvant code so the "repo" field is always
> non-NULL, as 5/5 here shows we had various workarounds in place for
> that, which can now go away.