Re: [PATCH 1/2] Make xdiff_outf_{init,release} interface

[Junio C Hamano <gitster@pobox.com>]

bdowning@lavos.net (Brian Downing) writes:

>> Although I wish xdi_diff() could do the necessary clean-up immediately
>> before it returns (so that the caller did not have to do anything
>> special), it is not possible to do so cleanly, because there are
>> "outf" implementations other than xdiff_outf that do not even use
>> "struct xdiff_emit_state" in their callbacks.  So I think your patch
>> makes sense.
>
> Well, I could do something like:
>
> 	if (xecb->outf == xdiff_outf)
> 		/* xdiff_outf cleanup */
>
> at the end of xdi_diff, but that's... kind of horrible I think.

Yeah, that is ugly, and that is why I said I think your patch makes sense.

> For that matter, I could just make an xdi_outf_diff function that would
> take the state in addition to the other xdi_diff arguments and go ahead
> and set it up, do the diff, and tear it down in one step.  Maybe that
> would be better if it works for everywhere this style of diff needs to
> be called.

Yeah, most of the xdi_diff() callers do use the stock outf so it would
make sense.