Re: [RFC/PATCH 4/4] grep: obey --textconv for the case rev:path

[Jeff King <peff@peff.net>]

On Wed, Feb 06, 2013 at 04:08:53PM +0100, Michael J Gruber wrote:

> -			add_object_array(object, arg, &list);
> +			add_object_array_with_context(object, arg, &list, xmemdupz(&oc, sizeof(struct object_context)));

If we go this route, this new _with_context variant should be used in
patch 1, too.

> @@ -265,9 +260,28 @@ void add_object_array_with_mode(struct object *obj, const char *name, struct obj
>  	objects[nr].item = obj;
>  	objects[nr].name = name;
>  	objects[nr].mode = mode;
> +	objects[nr].context = context;
>  	array->nr = ++nr;
>  }

This seems a little gross. Who is responsible for allocating the
context? Who frees it? It looks like we duplicate it in cmd_grep. Which
I think is OK, but it means all of this context infrastructure in
object.[ch] is just bolted-on junk waiting for somebody to use it wrong
or get confused.  It does not get set, for example, by the regular
setup_revisions code path.

It would be nice if we could just always have the context available,
then setup_revisions could set it up by default (and replace the "mode"
parameter entirely). But we'd need to do something to avoid the
PATH_MAX-sized buffer for each entry, as some code paths may have a
large number of pending objects.

-Peff