Michael J Gruber <g...@drmicha.warpmail.net> writes:

> Recently and not so recently, we made sure that log/grep type operations
> use textconv filters when a userfacing diff would do the same:
>
> ef90ab6 (pickaxe: use textconv for -S counting, 2012-10-28)
> b1c2f57 (diff_grep: use textconv buffers for add/deleted files, 2012-10-28)
> 0508fe5 (combine-diff: respect textconv attributes, 2011-05-23)
>
> "git grep" currently does not use textconv filters at all, that is
> neither for displaying the match and context nor for the actual grepping.
>
> Introduce a binary mode "--textconv" (in addition to "--text" and "-I")
> which makes git grep use any configured textconv filters for grepping
> and output purposes.
>
> Signed-off-by: Michael J Gruber <g...@drmicha.warpmail.net>
> ---
>
> Notes:
>     I'm somehow stuck in textconv/filespec/... hell, so I'm sending this out
>     in request for help. I'm sure there are people for whom it's a breeze to
>     get this right.

Looks like the patch touches the right places in the codepaths that
need to be updated from a quick read.

>     The difficulty is in getting the different cases (blob/sha1 vs.
>     worktree) right, and in making the changes minimally invasive.

I think grep_source abstraction was intended to be a way for that,
and if what it gives you is not sufficient for your needs, extending
it should not be seen as "invasive" at all.
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