Re: feature request: excluding files/paths from "git grep"

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On Wed, Feb 25, 2015 at 11:01:22AM -0800, Junio C Hamano wrote:

> Jeff King <peff@xxxxxxxx> writes:
> 
> > So I think _if_ using "diff" attributes is enough for this purpose, then
> > there is no code to be written.  But if somebody wants to draw a
> > distinction between the uses (I want to diff "foo" files, but never see
> > them in grep) then we could introduce a "grep" attribute (with the
> > fallback being the value of the "diff" attribute for that path).
> 
> That is all true.
> 
> If we were to have a new 'grep' attribute that can be used to
> express 'It is OK to diff two versions of this path, but hits by
> grep in this path is useless' (and verse versa), the built-in macro
> attribute 'binary' should also be updated with it.  A path being
> 'binary' currently means '-diff -merge -text' but it should also
> mean '-grep' in the new world, if we were to go in that direction.

I think it would do so automatically. There is no "grep" attribute
given, so we fall back to the "-diff" attribute. But I do not mind
modifying the macro to be more explicit.

Note also that I am not volunteering to work on this, nor am I convinced
it's actually worth pursuing. I've yet to see a useful case where you
would want text diffs but not greps (or vice versa), and if we can avoid
cluttering the attribute space, we should. I was mostly pointing it out
that it is not logically inconsistent to want such a thing. :)

If somebody does look into it, I suspect the place to start is modifying
userdiff_find_by_path to optionally prefer "grep" to "diff".

-Peff
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