From: Mikael Magnusson <mikachu@gmail.com>
Date: Mon, 24 Nov 2008 15:08:30 GMT
Subject: Re: Not-quite-a-bug in pickaxe
Message-ID: <237967ef0811240708t58d48c84ud0626ba3aaed47b6@mail.gmail.com>
In-Reply-To: <alpine.DEB.1.00.0811241238450.30769@pacific.mpi-cbg.de>

2008/11/24 Johannes Schindelin <Johannes.Schindelin@gmx.de>:
> Hi people,
>
> I do not know if I hit that behavior before,

I'm pretty sure it has,
http://thread.gmane.org/gmane.comp.version-control.git/100113/focus=100115
(at least i think that's the same case?)

> but now it hit me big time:
> if a commit moves a certain string from one place to another, "git log
> -S<string>" does not pick up that commit.  The code responsible for this
> is in diffcore-pickaxe.c:
>
>                        else if (!diff_unmodified_pair(p) &&
>                                 contains(p->one, needle, len, regexp) !=
>                                 contains(p->two, needle, len, regexp))
>                                has_changes++;
>
> Basically, the "contains()" method says how often the needle was found,
> and pickaxe just assumes that a move of a string is not interesting
> enough.
>
> Now, this behavior is probably intended, as searching files is much
> cheaper than generating the diffs between them, yet it is something you'll
> have to keep in mind when using "-S".

-- 
Mikael Magnusson