Re: Introduction and Wikipedia and Git Blame

["jamesmikedupont@googlemail.com" <jamesmikedupont@googlemail.com>]

What do you think of my idea to create blames along a specific user
defined byte positions ?
please review my suggestion and comment.

mike

On Fri, Oct 16, 2009 at 10:05 PM, Junio C Hamano <gitster@pobox.com> wrote:
> Junio C Hamano <gitster@pobox.com> writes:
>
>> "jamesmikedupont@googlemail.com" <jamesmikedupont@googlemail.com> writes:
>>
>>>> You would need to postprocess the computed result (either by diff or
>>>> blame) to lay out the final text output in either case anyway, and making
>>>> the existing blame engine do the work for you would be a better approach,
>>>> I think.
>>>
>>> Please can you tell me what is the basic algorithm of the blame engine?
>>
>> I think this is one of the most conprehensive write-up on the algorithm:
>>
>>   http://thread.gmane.org/gmane.comp.version-control.git/28826/focus=28895
>>
>> The whole thread (at least what I wrote in it) is worth reading if you
>> want to understand what the current code does.  The first message in the
>> thread talks about "NEEDSWORK" label on an unimplemented part of the code,
>> and says "we could", but these gaps were since filled.
>
> Ah, nevermind.  The thread is the definitive description of the blame
> algorithm, but I agree with Dscho that in this case, you either have to
> change blame itself to do this "byte-wise" comparison internally between
> versions, or re-do the blame logic yourself like Dscho suggests.  Dscho is
> right in this case; an unmodifled blame engine, unless you feed a history
> that is converted to use the byte-per-line format, won't help you at all.
>
> So it would be either between rolling a custom byte-wise blame algorithm
> yourself and teaching a new byte-wise mode to existing blame engine.
> Sorry for making the task sound much easier than it would be.
>
>
>