From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: ZheNing Hu <adlternative@gmail.com>
Cc: ZheNing Hu via GitGitGadget <gitgitgadget@gmail.com>,
Git List <git@vger.kernel.org>,
Junio C Hamano <gitster@pobox.com>,
Christian Couder <christian.couder@gmail.com>,
Hariom Verma <hariom18599@gmail.com>,
Bagas Sanjaya <bagasdotme@gmail.com>, Jeff King <peff@peff.net>
Subject: Re: [PATCH 2/8] [GSOC] ref-filter: add %(raw) atom
Date: Fri, 18 Jun 2021 12:49:02 +0200 [thread overview]
Message-ID: <87r1gz4faf.fsf@evledraar.gmail.com> (raw)
In-Reply-To: <CAOLTT8SGkObKWMZax-k4KXgsN+7ezvOMkRU-zt+c2zon2Ta3pA@mail.gmail.com>
On Fri, Jun 18 2021, ZheNing Hu wrote:
> Ævar Arnfjörð Bjarmason <avarab@gmail.com> 于2021年6月17日周四 下午10:45写道:
>>
>>
>> On Thu, Jun 17 2021, ZheNing Hu wrote:
>>
>> >
>> > Yes, strbuf is a suitable choice when using <str,len> pair.
>> > But if replace v->s with strbuf, the possible changes will be larger.
>>
>> I for one would like to see it done that way, those changes are usually
>> easy to read. Also it seems a large part of 2/8 is extra new code
>> because we didn't do that, e.g. getting length differently if something
>> is a strbuf or not, passing char*/size_t pairs to new functions etc.
>>
>
> After some refactoring, I found that there are two problems:
> 1. There are a lot of codes like this in ref-filter to fill v->s:
>
> v->s = show_ref(...)
> v->s = copy_email(...)
>
> It is very difficult to modify here: We know that show_ref()
> or copy_email() will allocate a block of memory to v->s, but
> if v->s is a strbuf, what should we do? In copy_email(), we
> can pass the v->s to copy_email() and use strbuf_add()/strbuf_addstr()
> instead of xstrdup() and xmemdupz(). But show_ref() will call
> external functions like shorten_unambiguous_ref(), we don’t know
> whether it will return us NULL or a dynamically allocated memory.
> If continue to pass v->s to the inner function, it is not a feasible
> method. Or we can use strbuf_attach() + strlen(), I'm not sure
> this is a good method.
>
> 2. See:
>
> - for (i = 0; i < used_atom_cnt; i++) {
> + for (i = 0; i < used_atom_cnt; i++) {
> struct atom_value *v = &ref->value[i];
> - if (v->s == NULL && used_atom[i].source == SOURCE_NONE)
> + if (v->s.len == 0 && used_atom[i].source == SOURCE_NONE)
> return strbuf_addf_ret(err, -1, _("missing
> object %s for %s"),
>
> oid_to_hex(&ref->objectname), ref->refname);
> }
>
> In the case of using strbuf, I don’t know how to distinguish between an empty
> strbuf and NULL. It can be easily distinguished by using c-style "const char*".
Yes, sometimes it's just too much of a hassle, looking at
shorten_unambiguous_ref() which returns a xstrdup()'d value that could
indeed be strbuf_attach'd. I haven't tried the conversion myself,
perhaps it's too much hassle.
Just a suggestion from reading your patch in isolation.
>> >
>> > Not python safe. See [1].
>> > Regarding the perl language, I support Junio's point of view: it can be
>> > re-supported in the future.
>>
>> Ah, I'd missed that. Anyway, if it's easy it seems you discovered that
>> Perl deals with it correctly, so we could just have it support this.
>>
>
> Well, it's ok, support for perl will be put in a separate commit.
>
>> >>
>> >> > +test_expect_success 'basic atom: refs/tags/testtag *raw' '
>> >> > + git cat-file commit refs/tags/testtag^{} >expected &&
>> >> > + git for-each-ref --format="%(*raw)" refs/tags/testtag >actual &&
>> >> > + sanitize_pgp <expected >expected.clean &&
>> >> > + sanitize_pgp <actual >actual.clean &&
>> >> > + echo "" >>expected.clean &&
>> >>
>> >> Just "echo" will do, ditto for the rest. Also odd to go back and forth
>> >> between populating expected.clean & actual.clean.
>> >>
>> >
>> > Are you saying that sanitize_pgp is not needed?
>>
>> No that instead of:
>>
>> echo "" >x
>>
>> You can do:
>>
>> echo >x
>>
>> And also that going back and forth between populating different files is
>> confusing, i.e. this:
>>
>>
>> echo a >x
>> echo c >y
>> echo b >>x
>>
>> is better as:
>>
>> echo a >x
>> echo b >>x
>> echo c >y
>>
>>
>
> Thanks, I get what you meant now.
>
>> >>
>> >> > +test_expect_success 'set up refs pointing to binary blob' '
>> >> > + printf "a\0b\0c" >blob1 &&
>> >> > + printf "a\0c\0b" >blob2 &&
>> >> > + printf "\0a\0b\0c" >blob3 &&
>> >> > + printf "abc" >blob4 &&
>> >> > + printf "\0 \0 \0 " >blob5 &&
>> >> > + printf "\0 \0a\0 " >blob6 &&
>> >> > + printf " " >blob7 &&
>> >> > + >blob8 &&
>> >> > + git hash-object blob1 -w | xargs git update-ref refs/myblobs/blob1 &&
>> >> > + git hash-object blob2 -w | xargs git update-ref refs/myblobs/blob2 &&
>> >> > + git hash-object blob3 -w | xargs git update-ref refs/myblobs/blob3 &&
>> >> > + git hash-object blob4 -w | xargs git update-ref refs/myblobs/blob4 &&
>> >> > + git hash-object blob5 -w | xargs git update-ref refs/myblobs/blob5 &&
>> >> > + git hash-object blob6 -w | xargs git update-ref refs/myblobs/blob6 &&
>> >> > + git hash-object blob7 -w | xargs git update-ref refs/myblobs/blob7 &&
>> >> > + git hash-object blob8 -w | xargs git update-ref refs/myblobs/blob8
>> >>
>> >> Hrm, xargs just to avoid:
>> >>
>> >> git update-ref ... $(git hash-object) ?
>> >>
>> >
>> > I didn’t think about it, just for convenience.
>>
>> *nod*, Junio had a good suggestion.
>>
>
> ok.
>
> Thanks.
next prev parent reply other threads:[~2021-06-18 10:51 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-12 11:14 [PATCH 0/8] [GSOC][RFC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-12 11:14 ` [PATCH 1/8] [GSOC] ref-filter: add obj-type check in grab contents ZheNing Hu via GitGitGadget
2021-06-17 7:04 ` Ævar Arnfjörð Bjarmason
2021-06-17 7:28 ` Junio C Hamano
2021-06-12 11:14 ` [PATCH 2/8] [GSOC] ref-filter: add %(raw) atom ZheNing Hu via GitGitGadget
2021-06-17 7:10 ` Ævar Arnfjörð Bjarmason
2021-06-17 7:34 ` Junio C Hamano
2021-06-17 9:22 ` ZheNing Hu
2021-06-17 14:37 ` Ævar Arnfjörð Bjarmason
2021-06-17 16:14 ` ZheNing Hu
2021-06-18 10:49 ` Ævar Arnfjörð Bjarmason [this message]
2021-06-18 13:47 ` Christian Couder
2021-06-12 11:14 ` [PATCH 3/8] [GSOC] ref-filter: use non-const ref_format in *_atom_parser() ZheNing Hu via GitGitGadget
2021-06-12 11:14 ` [PATCH 4/8] [GSOC] ref-filter: add %(rest) atom ZheNing Hu via GitGitGadget
2021-06-12 11:14 ` [PATCH 5/8] [GSOC] ref-filter: teach get_object() return useful value ZheNing Hu via GitGitGadget
2021-06-12 20:09 ` Christian Couder
2021-06-13 10:11 ` ZheNing Hu
2021-06-17 7:22 ` Ævar Arnfjörð Bjarmason
2021-06-17 10:01 ` ZheNing Hu
2021-06-12 11:14 ` [PATCH 6/8] [GSOC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-12 11:14 ` [PATCH 7/8] [GSOC] cat-file: reuse err buf in batch_objet_write() ZheNing Hu via GitGitGadget
2021-06-17 7:16 ` Ævar Arnfjörð Bjarmason
2021-06-17 8:05 ` ZheNing Hu
2021-06-12 11:14 ` [PATCH 8/8] [GSOC] cat-file: re-implement --textconv, --filters options ZheNing Hu via GitGitGadget
2021-06-17 7:18 ` Ævar Arnfjörð Bjarmason
2021-06-17 9:53 ` ZheNing Hu
2021-06-15 13:28 ` [PATCH v2 0/9] [GSOC][RFC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-15 13:28 ` [PATCH v2 1/9] [GSOC] ref-filter: add obj-type check in grab contents ZheNing Hu via GitGitGadget
2021-06-15 13:28 ` [PATCH v2 2/9] [GSOC] ref-filter: add %(raw) atom ZheNing Hu via GitGitGadget
2021-06-15 13:28 ` [PATCH v2 3/9] [GSOC] ref-filter: use non-const ref_format in *_atom_parser() ZheNing Hu via GitGitGadget
2021-06-15 13:29 ` [PATCH v2 4/9] [GSOC] ref-filter: add %(rest) atom ZheNing Hu via GitGitGadget
2021-06-15 13:29 ` [PATCH v2 5/9] [GSOC] ref-filter: teach get_object() return useful value ZheNing Hu via GitGitGadget
2021-06-16 7:36 ` Junio C Hamano
2021-06-17 7:23 ` ZheNing Hu
2021-06-15 13:29 ` [PATCH v2 6/9] [GSOC] ref-filter: introduce free_array_item_internal() function ZheNing Hu via GitGitGadget
2021-06-16 7:49 ` Junio C Hamano
2021-06-17 8:03 ` ZheNing Hu
2021-06-15 13:29 ` [PATCH v2 7/9] [GSOC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-15 13:29 ` [PATCH v2 8/9] [GSOC] cat-file: reuse err buf in batch_objet_write() ZheNing Hu via GitGitGadget
2021-06-15 13:29 ` [PATCH v2 9/9] [GSOC] cat-file: re-implement --textconv, --filters options ZheNing Hu via GitGitGadget
2021-06-16 7:29 ` [PATCH v2 0/9] [GSOC][RFC] cat-file: reuse ref-filter logic Junio C Hamano
2021-06-17 6:07 ` ZheNing Hu
2021-06-17 7:26 ` Ævar Arnfjörð Bjarmason
2021-06-17 10:02 ` ZheNing Hu
2021-06-19 7:02 ` [PATCH v3 00/10] " ZheNing Hu via GitGitGadget
2021-06-19 7:02 ` [PATCH v3 01/10] [GSOC] ref-filter: add obj-type check in grab contents ZheNing Hu via GitGitGadget
2021-06-19 7:02 ` [PATCH v3 02/10] [GSOC] ref-filter: add %(raw) atom ZheNing Hu via GitGitGadget
2021-06-19 7:02 ` [PATCH v3 03/10] [GSOC] ref-filter: --format=%(raw) re-support --perl ZheNing Hu via GitGitGadget
2021-06-19 7:02 ` [PATCH v3 04/10] [GSOC] ref-filter: use non-const ref_format in *_atom_parser() ZheNing Hu via GitGitGadget
2021-06-19 7:02 ` [PATCH v3 05/10] [GSOC] ref-filter: add %(rest) atom ZheNing Hu via GitGitGadget
2021-06-19 7:02 ` [PATCH v3 06/10] [GSOC] ref-filter: pass get_object() return value to their callers ZheNing Hu via GitGitGadget
2021-06-19 7:02 ` [PATCH v3 07/10] [GSOC] ref-filter: introduce free_ref_array_item_value() function ZheNing Hu via GitGitGadget
2021-06-19 7:02 ` [PATCH v3 08/10] [GSOC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-21 5:55 ` Christian Couder
2021-06-21 13:05 ` ZheNing Hu
2021-06-19 7:02 ` [PATCH v3 09/10] [GSOC] cat-file: reuse err buf in batch_object_write() ZheNing Hu via GitGitGadget
2021-06-19 7:03 ` [PATCH v3 10/10] [GSOC] cat-file: re-implement --textconv, --filters options ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 00/14] [GSOC][RFC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 01/14] [GSOC] ref-filter: add obj-type check in grab contents ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 02/14] [GSOC] ref-filter: add %(raw) atom ZheNing Hu via GitGitGadget
2021-06-24 4:14 ` Bagas Sanjaya
2021-06-24 8:23 ` ZheNing Hu
2021-06-22 3:20 ` [PATCH v4 03/14] [GSOC] ref-filter: --format=%(raw) re-support --perl ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 04/14] [GSOC] ref-filter: use non-const ref_format in *_atom_parser() ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 05/14] [GSOC] ref-filter: add %(rest) atom ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 06/14] [GSOC] ref-filter: pass get_object() return value to their callers ZheNing Hu via GitGitGadget
2021-06-24 4:02 ` Bagas Sanjaya
2021-06-22 3:20 ` [PATCH v4 07/14] [GSOC] ref-filter: introduce free_ref_array_item_value() function ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 08/14] [GSOC] ref-filter: add cat_file_mode in struct ref_format ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 09/14] [GSOC] ref-filter: modify the error message and value in get_object ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 10/14] [GSOC] cat-file: add has_object_file() check ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 11/14] [GSOC] cat-file: change batch_objects parameter name ZheNing Hu via GitGitGadget
2021-06-24 4:07 ` Bagas Sanjaya
2021-06-22 3:20 ` [PATCH v4 12/14] [GSOC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 13/14] [GSOC] cat-file: reuse err buf in batch_object_write() ZheNing Hu via GitGitGadget
2021-06-22 3:20 ` [PATCH v4 14/14] [GSOC] cat-file: re-implement --textconv, --filters options ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 00/15] [GSOC][RFC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 01/15] [GSOC] ref-filter: add obj-type check in grab contents ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 02/15] [GSOC] ref-filter: add %(raw) atom ZheNing Hu via GitGitGadget
2021-06-26 0:42 ` Bagas Sanjaya
2021-06-27 11:43 ` ZheNing Hu
2021-06-25 16:02 ` [PATCH v5 03/15] [GSOC] ref-filter: --format=%(raw) re-support --perl ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 04/15] [GSOC] ref-filter: use non-const ref_format in *_atom_parser() ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 05/15] [GSOC] ref-filter: add %(rest) atom ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 06/15] [GSOC] ref-filter: pass get_object() return value to their callers ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 07/15] [GSOC] ref-filter: introduce free_ref_array_item_value() function ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 08/15] [GSOC] ref-filter: add cat_file_mode in struct ref_format ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 09/15] [GSOC] ref-filter: modify the error message and value in get_object ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 10/15] [GSOC] cat-file: add has_object_file() check ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 11/15] [GSOC] cat-file: change batch_objects parameter name ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 12/15] [GSOC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-26 17:26 ` Hariom verma
2021-06-27 11:31 ` ZheNing Hu
2021-06-26 18:08 ` Hariom verma
2021-06-27 11:34 ` ZheNing Hu
2021-06-25 16:02 ` [PATCH v5 13/15] [GSOC] cat-file: reuse err buf in batch_object_write() ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 14/15] [GSOC] cat-file: re-implement --textconv, --filters options ZheNing Hu via GitGitGadget
2021-06-25 16:02 ` [PATCH v5 15/15] [GSOC] ref-filter: remove grab_oid() function ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 00/15] [GSOC][RFC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 01/15] [GSOC] ref-filter: add obj-type check in grab contents ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 02/15] [GSOC] ref-filter: add %(raw) atom ZheNing Hu via GitGitGadget
2021-06-28 6:49 ` Bagas Sanjaya
2021-06-27 12:35 ` [PATCH v6 03/15] [GSOC] ref-filter: --format=%(raw) re-support --perl ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 04/15] [GSOC] ref-filter: use non-const ref_format in *_atom_parser() ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 05/15] [GSOC] ref-filter: add %(rest) atom ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 06/15] [GSOC] ref-filter: pass get_object() return value to their callers ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 07/15] [GSOC] ref-filter: introduce free_ref_array_item_value() function ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 08/15] [GSOC] ref-filter: add cat_file_mode in struct ref_format ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 09/15] [GSOC] ref-filter: modify the error message and value in get_object ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 10/15] [GSOC] cat-file: add has_object_file() check ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 11/15] [GSOC] cat-file: change batch_objects parameter name ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 12/15] [GSOC] cat-file: reuse ref-filter logic ZheNing Hu via GitGitGadget
2021-06-28 7:46 ` Hariom verma
2021-06-28 13:51 ` ZheNing Hu
2021-06-27 12:35 ` [PATCH v6 13/15] [GSOC] cat-file: reuse err buf in batch_object_write() ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 14/15] [GSOC] cat-file: re-implement --textconv, --filters options ZheNing Hu via GitGitGadget
2021-06-27 12:35 ` [PATCH v6 15/15] [GSOC] ref-filter: remove grab_oid() function ZheNing Hu via GitGitGadget
2021-06-30 22:04 ` [PATCH v6 00/15] [GSOC][RFC] cat-file: reuse ref-filter logic Junio C Hamano
2021-07-01 12:39 ` ZheNing Hu
2021-07-01 14:17 ` Junio C Hamano
2021-07-09 10:04 ` ZheNing Hu
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