Re: [PATCH 7/8] config: add core.untrackedCache

[Junio C Hamano <gitster@pobox.com>]

Duy Nguyen <pclouds@gmail.com> writes:

> In that case we can just check config once in read_index_from and
> destroy UNTR extension. Or the middle ground, we check config once in
> that place, make a note in struct index_state, and make invalidate_*
> check that note instead of config file. The middle ground has an
> advantage over destroying UNTR: (probably) many operations will touch
> index but do not add or remove entries.

Or we can even teach read_index_from() to skip reading the extension
without even parsing when the configuration tells it that the
feature is force-disabled.  It can also add an empty one when the
configuration tells it that the feature is force-enabled and there
is no UNTR extension yet.