Jakub Narębski <jna...@gmail.com> writes:

> W dniu 2014-04-03 23:44, Junio C Hamano pisze:
>> René Scharfe <l....@web.de> writes:
>>> With that approach you depend on the hunk header and apparently need
>>> the results.  This approach feels fragile.
>>> Would it perhaps be more robust to not base the implementation on diff
>>> and instead to scan the raw file contents?
>> That is an interesting idea.
>> Perhaps this can be implemented as a new stage in the transformation
>> pipeline, I wonder?  There is currently no transformation that
>> modifies the blob contents being compared, but I do not think there
>> is anything fundamental that prevents one from being written.  The
>> new "limit to this function body" transformation would perhaps sit
>> before the diffcore-rename and would transform all the blobs to
>> empty, except for the part that is the body of the function the user
>> is interested in.
> Well, there is 'texconv', e.g.
>   .gitattributes
>   *.jpg diff=jpg
>   .git/config
>   [diff "jpg"]
>          textconv = exif

;-)  So you could define this textconv

    sed -n -e '/^int main(/,/^}/p'

to limit the output only to the definition of the function main().

> Doesn't it fit in said place in the transformation pipeline?

Not at all, unfortunately.  The textconv conversion happens in the
final output stage and comes way too late to influence the earlier
stages like renames and pickaxe, which will still see the whole
contents outside the definition of the function main().

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