Re: format-patch: no 'prerequisite-patch-id' info when specifying commit range

[Ye Xiaolong <xiaolong.ye@intel.com>]

On 06/04, Junio C Hamano wrote:
>Ye Xiaolong <xiaolong.ye@intel.com> writes:
>
>> I narrowed down the problem to revision walk, if users specify the commit range
>> via "Z..C" pattern, the first prepare_revision_walk function called in
>> cmd_format_patch would mark all parents (ancestors) of Z to be uninteresting,
>> thus the next revision walk in prepare_bases wouldn't be able to reach
>> prerequisite patches, one quick solution I can think of is to clear
>> UNINTERESTING flag in reset_revision_walk, like below:
>>
>> void reset_revision_walk(void)
>> {
>> 	clear_object_flags(SEEN | ADDED | SHOWN| UNINTERESTING);
>> }
>
>When you are done with objects that are UNINTERESTING in your
>application (i.e. only when "format-patch" is told to compute list
>of prereq patches by doing an extra revision walk), your application
>can call clear_object_flags() on the flags you are done with, I
>would think.
>
>But the current callers of reset_revision_walk() do not expect any
>flags other than the ones that are used to keep track of the
>traversal state, so it is likely you will break them if you suddenly
>started to clear flags randomly.

Got it, I'll try to call clear_object_flags in format-patch related codepatch
only, not to touch the global reset_revision_walk.

Thanks,
Xiaolong