Re: cmd_cherry in builtin/log.c?

[Thiago Farina <tfransosi@gmail.com>]

On Tue, Dec 7, 2010 at 3:39 PM, Jonathan Nieder <jrnieder@gmail.com> wrote:
> Hi,
>
> Thiago Farina wrote:
>
>> I was looking into builtin/log.c to see how it does --reverse and I
>> saw that cmd_cherry is there.
>>
>> I'm wondering, why is it there?
>
> Good question.  So let's check.
>
>  $ git log --oneline -Scmd_cherry builtin/log.c
>  81b50f3 Move 'builtin-*' into a 'builtin/' subdirectory
>
> That wasn't too helpful.  Okay, okay.
>
>  $ git log --oneline -Scmd_cherry -- builtin-log.c
>  81b50f3 Move 'builtin-*' into a 'builtin/' subdirectory
>  e827633 Built-in cherry
>
> Running "git show e827633" reveals that the core of the original
> script is
>
>        for c in $inup
>        do
>                git-diff-tree -p $c
>        done | git-patch-id |
>        while read id name
>        do
>                echo $name >>$patch/$id
>        done
>
> while the core of the builtin version is
>
>        get_patch_ids(&revs, &patch_id_opts, prefix);
>
> The latter function is static, introduced by v1.4.1~12^2~5
> (format-patch: introduce "--ignore-if-in-upstream", 2006-06-25).
>
> So the answer is that "git cherry" is considered a variant on
> "git log" (like format-patch, show, and whatchanged) and that it uses
> "git log" internals.
>

Yup, thanks for digging into it. Now makes sense.