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From:   Elijah Newren <newren@gmail.com>
Date:   Tue, 19 Feb 2019 15:00:44 -0800
Message-ID: <CABPp-BE19yVzDife5PqdQGmKrwrffoOt2KzBisgbqxaGry7LBw@mail.gmail.com>
Subject: Re: [PATCH 6/8] checkout: add --cached option
To:     Junio C Hamano <gitster@pobox.com>
Cc:     Duy Nguyen <pclouds@gmail.com>,
        Thomas Gummerer <t.gummerer@gmail.com>,
        Git Mailing List <git@vger.kernel.org>
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On Tue, Feb 19, 2019 at 2:36 PM Junio C Hamano <gitster@pobox.com> wrote:
>
> Elijah Newren <newren@gmail.com> writes:
>
> >> As long as worktree-only mode does not lose track of a
> >> previously-untracked path in the index (perhaps use the i-t-a bit),
> >> I do not have a strong objection against making the worktree-only
> >> mode the default.
> >
> > Could you unpack that for me a bit?
>
> Suppose in an ancient version v1.0 there was a file called
> README.txt but these days such a file does not exist (there may be
> README.md added though).  By default, the command does not stuff the
> contents to the index out of the tree and instead operate only on
> the working tree.
>
>   $ git restore-path --source v1.0 README.txt
>
> At this point, you are assuming that README.txt will become
> untracked and the user needs to manually add it.  I was asking if it
> makes sense to at least make the index "aware of" it with I-T-A bit,
> and I am leaning towards answering "yes" to that question.

Ah, thanks for all the clarifications (for this and the other emails).
Your suggestion here would mean that --worktree alone wouldn't
actually treat the index as read-only, but I too am leaning towards
the thought that it makes sense to set the i-t-a bit for such cases.