From: Tim Chase <git@tim.thechases.com>
Date: Tue, 21 Aug 2012 15:42:13 GMT
Subject: Re: misleading diff-hunk header
Message-ID: <5033AC55.8080405@tim.thechases.com>
In-Reply-To: <87a9xoi82i.fsf@thomas.inf.ethz.ch>

On 08/21/12 10:22, Thomas Rast wrote:
> Tim Chase <git@tim.thechases.com> writes:
> 
>> diff.{type}.xfuncname seems to start searching backwards in
>> from the beginning of the hunk, not the first differing line.
> [...]
>>   @@ -4,4 +4,5 @@ int call_me(int maybe)
>>
>>    int main()
>>    {
>>   +  return 0;
>>    }
>>
>> misleadingly suggesting that the change occurred in the call_me()
>> function, rather than in main()
> 
> I think that's intentional, and matches what 'diff -p' does.  It gives
> you the context before the hunk.  After all, if a new function starts in
> the leading context lines, you can see that in the usual diff data.

Okay...I tested "diff -p" and can't argue (much) with historical
adherence.  It just makes it hard for me to gather some stats on the
functions that changed, and requires that I look in more than one
place (both in the header, and in the leading context) rather than
having a single authoritative place to grep.

Then again, "diff -p" only seems to support C functions, while git
supports bibtex, cpp, html, java, objc, pascal, php, python, ruby,
and tex out-of-the-box, with the option to build your own
function-finder, so pure adherence to history gets a little muddied.

Thanks for your thoughts,

-tkc