Re: [PATCH v5 00/17] New sparse-checkout builtin and "cone" mode

> V4 UPDATE: Rebased on latest master to include ew/hashmap and
> ds/include-exclude in the base.
>
> This series makes the sparse-checkout feature more user-friendly. While
> there, I also present a way to use a limited set of patterns to gain a
> significant performance boost in very large repositories.
> ...
> Updates in V5:
>
>  * The 'set' subcommand now enables the core.sparseCheckout config setting
>    (unless the checkout fails).
>    
>    
>  * If the in-process unpack_trees() fails with the new patterns, the
>    index.lock file is rolled back before the replay of the old
>    sparse-checkout patterns.
>    
>    
>  * Some documentation fixes, f(d)open->xf(d)open calls, and other nits.
>    Thanks everyone!