From: Karthik Nayak <karthik.188@gmail.com>
To: Michael Haggerty <mhagger@alum.mit.edu>
Cc: Git <git@vger.kernel.org>,
Christian Couder <christian.couder@gmail.com>,
Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>,
Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH v13 05/12] ref-filter: add option to filter out tags, branches and remotes
Date: Thu, 27 Aug 2015 21:05:08 +0530 [thread overview]
Message-ID: <CAOLa=ZS3_sSaMjkSchdQGE1s5bgg00DPWe=F+KsUdjQt=opDyg@mail.gmail.com> (raw)
In-Reply-To: <55DF2BA1.2020107@alum.mit.edu>
On Thu, Aug 27, 2015 at 8:54 PM, Michael Haggerty <mhagger@alum.mit.edu> wrote:
> On 08/27/2015 02:42 PM, Karthik Nayak wrote:
>> On Wed, Aug 26, 2015 at 9:40 PM, Michael Haggerty <mhagger@alum.mit.edu> wrote:
>>> On 08/22/2015 05:39 AM, Karthik Nayak wrote:
>>>> [...]
>>>> + if (type == FILTER_REFS_BRANCHES)
>>>> + ret = for_each_reftype_fullpath(ref_filter_handler, "refs/heads/", broken, &ref_cbdata);
>>>> + else if (type == FILTER_REFS_REMOTES)
>>>> + ret = for_each_reftype_fullpath(ref_filter_handler, "refs/remotes/", broken, &ref_cbdata);
>>>> + else if (type == FILTER_REFS_TAGS)
>>>> + ret = for_each_reftype_fullpath(ref_filter_handler, "refs/tags/", broken, &ref_cbdata);
>>>> + else if (type & FILTER_REFS_ALL) {
>>>> + ret = for_each_reftype_fullpath(ref_filter_handler, "", broken, &ref_cbdata);
>>>> + if (type & FILTER_REFS_DETACHED_HEAD)
>>>> + head_ref(ref_filter_handler, &ref_cbdata);
>>>
>>> The usual promise of the for_each_ref functions is that they stop
>>> iterating if the function ever returns a nonzero value. So the above
>>> should be
>>>
>>> if (! ret && (type & FILTER_REFS_DETACHED_HEAD))
>>> ret = head_ref(ref_filter_handler, &ref_cbdata);
>>>
>>> Also, these functions usually iterate in lexicographic order, so I think
>>> you should process HEAD before the others.
>>
>> This is done on purpose, cause we need to print the HEAD ref separately
>> so we print the last ref_array_item in the ref_array, free that memory and
>> sort and print the rest, hence HEAD ref is attached to the last.
>
> Without having looked at the other patches, this makes me wonder whether
> it makes sense to store HEAD in the ref_array at all or whether it
> should be handled separately.
>
Well then we'd need another ref_array just for that, that also could
be an option.
But apart from printing it first, everything else is the same for all the refs.
>>> But there's another problem here. It seems like
>>> FILTER_REFS_DETACHED_HEAD is only processed if (type & FILTER_REFS_ALL)
>>> is nonzero. But shouldn't it be allowed to process *only* HEAD?
>>>
>>> So, finally, I think this code should look like
>>>
>>> else if (!filter->kind)
>>> die("filter_refs: invalid type");
>>> else {
>>> if (filter->kind & FILTER_REFS_DETACHED_HEAD)
>>> ret = head_ref(ref_filter_handler, &ref_cbdata);
>>> if (! ret && (filter->kind & FILTER_REFS_ALL))
>>> ret =
>>> for_each_reftype_fullpath(ref_filter_handler, "", broken, &ref_cbdata);
>>> }
>>>
>>
>> So finally something like this perhaps
>>
>> if (!filter->kind)
>> die("filter_refs: invalid type");
>> else {
>> if (filter->kind == FILTER_REFS_BRANCHES)
>> ret = for_each_reftype_fullpath(ref_filter_handler,
>> "refs/heads/", broken, &ref_cbdata);
>> else if (filter->kind == FILTER_REFS_REMOTES)
>> ret = for_each_reftype_fullpath(ref_filter_handler,
>> "refs/remotes/", broken, &ref_cbdata);
>> else if (filter->kind == FILTER_REFS_TAGS)
>> ret = for_each_reftype_fullpath(ref_filter_handler,
>> "refs/tags/", broken, &ref_cbdata);
>> else if (filter->kind & FILTER_REFS_ALL)
>> ret = for_each_reftype_fullpath(ref_filter_handler, "",
>> broken, &ref_cbdata);
>> if (filter->kind & FILTER_REFS_DETACHED_HEAD)
>> head_ref(ref_filter_handler, &ref_cbdata);
>> }
>
> Yes, but the last test should be
>
> if (!ret && (filter->kind & FILTER_REFS_DETACHED_HEAD))
>
> unless you have a reason not to follow the usual convention that a
> nonzero return value from fn means that the iteration should be aborted.
>
No, of course, I missed that while typing here.
--
Regards,
Karthik Nayak
next prev parent reply other threads:[~2015-08-27 15:35 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-22 3:39 [PATCH v13 00/12] port tag.c to use ref-filter APIs Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 01/12] ref-filter: move `struct atom_value` to ref-filter.c Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 02/12] ref-filter: introduce ref_formatting_state and ref_formatting_stack Karthik Nayak
2015-08-24 21:56 ` Junio C Hamano
2015-08-25 10:26 ` Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 03/12] utf8: add function to align a string into given strbuf Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 04/12] ref-filter: implement an `align` atom Karthik Nayak
2015-08-24 22:13 ` Junio C Hamano
2015-08-24 22:15 ` Junio C Hamano
2015-08-25 13:28 ` Karthik Nayak
2015-08-25 6:47 ` Matthieu Moy
2015-08-25 13:30 ` Karthik Nayak
2015-08-25 17:56 ` Junio C Hamano
2015-08-26 6:41 ` Karthik Nayak
2015-08-25 17:52 ` Junio C Hamano
2015-08-25 13:28 ` Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 05/12] ref-filter: add option to filter out tags, branches and remotes Karthik Nayak
2015-08-24 22:24 ` Junio C Hamano
2015-08-25 13:07 ` Karthik Nayak
2015-08-26 16:10 ` Michael Haggerty
2015-08-27 12:42 ` Karthik Nayak
2015-08-27 15:24 ` Michael Haggerty
2015-08-27 15:35 ` Karthik Nayak [this message]
2015-08-22 3:39 ` [PATCH v13 06/12] ref-filter: support printing N lines from tag annotation Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 07/12] ref-filter: add support to sort by version Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 08/12] ref-filter: add option to match literal pattern Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 09/12] tag.c: use 'ref-filter' data structures Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 10/12] tag.c: use 'ref-filter' APIs Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 11/12] tag.c: implement '--format' option Karthik Nayak
2015-08-23 19:56 ` Matthieu Moy
2015-08-24 15:07 ` Karthik Nayak
2015-08-24 15:14 ` Matthieu Moy
2015-08-24 15:21 ` Karthik Nayak
2015-08-22 3:39 ` [PATCH v13 12/12] tag.c: implement '--merged' and '--no-merged' options Karthik Nayak
2015-08-23 20:00 ` [PATCH v13 00/12] port tag.c to use ref-filter APIs Matthieu Moy
2015-08-24 15:09 ` Karthik Nayak
2015-08-24 15:16 ` Matthieu Moy
2015-08-24 15:22 ` Karthik Nayak
2015-08-24 22:34 ` Junio C Hamano
2015-08-24 22:58 ` Junio C Hamano
2015-08-25 13:26 ` Karthik Nayak
2015-08-25 19:16 ` Junio C Hamano
2015-08-25 19:43 ` Junio C Hamano
2015-08-26 5:56 ` Karthik Nayak
2015-08-26 14:37 ` Junio C Hamano
2015-08-26 19:14 ` Karthik Nayak
2015-08-26 20:19 ` Junio C Hamano
2015-08-27 18:00 ` Karthik Nayak
2015-08-25 13:23 ` Karthik Nayak
2015-08-24 17:27 ` Junio C Hamano
2015-08-24 18:09 ` Karthik Nayak
2015-08-24 18:53 ` Junio C Hamano
2015-08-24 22:35 ` Junio C Hamano
2015-08-26 10:07 ` Karthik Nayak
2015-08-26 11:54 ` Matthieu Moy
2015-08-26 15:44 ` Junio C Hamano
2015-08-26 15:46 ` Junio C Hamano
2015-08-26 15:48 ` Matthieu Moy
2015-08-26 19:11 ` Karthik Nayak
2015-08-25 13:25 ` Karthik Nayak
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