From: Jonathan Nieder <jrnieder@gmail.com>
Date: Fri, 15 Oct 2010 23:40:08 GMT
Subject: Re: Can I checkout a single file without altering index?
Message-ID: <20101015234008.GC25624@burratino>
In-Reply-To: <7viq13avn0.fsf@alter.siamese.dyndns.org>

Junio C Hamano wrote:

>                                                           If somebody
> can write a convincing use case that shows why it is useful, such an
> option shouldn't be very hard to add.  But I don't think of any.  For
> example, this is not it:
> 
>     I start from a clean slate and start working.
> 
>     $ git checkout
>     $ edit; git diff; compile; test; git add path ;# repeat
> 
>     At this point I have some cooked contents added for the next commit
>     in the index for path.  But I realize that the contents of that path
>     in another branch might be even better.  But I do not want to lose
>     the state I arrived at, which might be better than that alternative.
>     I cannot decide, so I'll keep that in the index for now.

To be a devil's advocate (because I am not convinced yet), here is one:

    I start from a clean slate and start working.

    $ git checkout
    $ edit; git diff; compile; test; git add path ;# repeat

    At this point I have some cooked contents added for the next commit
    in the index for path.  Illustrating the new change is a new test,
    and I want to "test the test" by trying it out against the inferior
    previous state.

    $ git checkout --no-index HEAD path
    $ test; edit test; git diff; compile; test; git add test ;# repeat

    Now one last test run with the improved state

    $ git checkout path
    $ compile; test
    $ git commit