Re: [PATCH v3 00/20] Introduce `USE_THE_REPOSITORY_VARIABLE` macro

> Hi,
>
> this is the third version of my patch series that introduces the
> `USE_THE_REPOSITORY_VARIABLE` macro. When unset, this will cause us to
> hide `the_repository`, `the_hash_algo` and several other functions that
> implicitly rely on those global variables from our headers. This is a
> first step towards fully getting rid of this global state in favor of
> passing it down explicitly via function parameters.
>
> Changes compared to v2:
>
>   - Note in a commit message that we aim to have a faithful conversion
>     when introducing a `struct git_hash_algo` parameter to functions. So
>     even in case the calling context has a `struct git_hash_algo`
>     available via a local repository, we still use `the_repository` such
>     that there cannot be a change in behaviour here. Fixing those sites
>     will be left for a future patch series such that we can avoid any
>     kind of regressions caused by this comparatively large refactoring.
>     I also adapted some conversions to fully follow through with this
>     intent.
>
>   - Fix an issue with sparse by adding another `extern` declaration of
>     `the_repository` to "repository.c".
>
> Thanks!
>