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From: Junio C Hamano <gitster@pobox.com>
To: Olga Telezhnaya <olyatelezhnaya@gmail.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH RFC 03/24] cat-file: split expand_atom into 2 functions
Date: Fri, 26 Jan 2018 13:46:02 -0800	[thread overview]
Message-ID: <xmqqvafo5m5h.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <0102016133ff3afb-6bab2c11-e0f3-4bef-9626-fbcc826bcb15-000000@eu-west-1.amazonses.com> (Olga Telezhnaya's message of "Fri, 26 Jan 2018 19:43:40 +0000")

Olga Telezhnaya <olyatelezhnaya@gmail.com> writes:

> Split expand_atom function into 2 different functions,
> expand_atom_into_fields prepares variable for further filling,
> (new) expand_atom creates resulting string.
> Need that for further reusing of formatting logic from ref-filter.
>
> Signed-off-by: Olga Telezhnaia <olyatelezhnaya@gmail.com>
> Mentored-by: Christian Couder <christian.couder@gmail.com>
> Mentored by: Jeff King <peff@peff.net>
> ---
>  builtin/cat-file.c | 73 +++++++++++++++++++++++++++++-------------------------
>  1 file changed, 39 insertions(+), 34 deletions(-)

As expand_atom() is file-scope static and its callers are well
isolated, it is OK to change its meaning while restructuring the
code like this patch does (as opposed to a public function to which
new callers may be added on other topics in flight).

The split itself looks sensible, but expand_atom_into_fields() is a
questionable name.  expand_atom() does fill the data in sb, but
calling expand_atom_into_fields() does not fill any data into
separated fields---it merely prepares somebody else to do so.

Helped by this comment:

	/*
	 * If mark_query is true, we do not expand anything, but rather
	 * just mark the object_info with items we wish to query.
	 */
	int mark_query;

we can guess that a better name would mention or hint "object_info",
"query" and probably "prepare" (because we would do so before
actually querying).

I am not sure if separating the logic into these two functions is a
good way to organize things.  When a new %(atom) is introduced, it
is more likely that a programmer adds it to one but forgets to make
a matching change to the other, no?  (here, "I am not sure" is just
that.  It is very different from "I am sure this is wrong").

Thanks.

  reply	other threads:[~2018-01-26 21:46 UTC|newest]

Thread overview: 115+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-26 19:43 [PATCH RFC 01/24] ref-filter: get rid of goto Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 16/24] ref-filter: make cat_file_info independent Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 21/24] ref-filter: work with objectsize:disk Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 02/24] ref-filter: add return value to some functions Olga Telezhnaya
2018-01-26 21:05   ` Junio C Hamano
2018-01-29  7:36     ` Оля Тележная
2018-01-26 19:43 ` [PATCH RFC 15/24] cat-file: move skip_object_info into ref-filter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 09/24] cat-file: start use ref_array_item struct Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 14/24] ref_filter: add is_rest_atom_used function Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 06/24] cat-file: move struct expand_data into ref-filter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 10/24] ref-filter: make populate_value global Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 13/24] ref-filter: add is_cat flag Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 07/24] cat-file: start migrating to ref-filter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 24/24] cat-file: update of docs Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 03/24] cat-file: split expand_atom into 2 functions Olga Telezhnaya
2018-01-26 21:46   ` Junio C Hamano [this message]
2018-01-29  7:26     ` Оля Тележная
2018-01-26 19:43 ` [PATCH RFC 12/24] ref-filter: get rid of expand_atom_into_fields Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 08/24] ref-filter: reuse parse_ref_filter_atom Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 11/24] cat-file: start reusing populate_value Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 04/24] cat-file: reuse struct ref_format Olga Telezhnaya
2018-01-26 22:18   ` Junio C Hamano
2018-01-26 19:43 ` [PATCH RFC 05/24] ref-filter: make valid_atom as function parameter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 18/24] ref-filter: make valid_atom general again Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 22/24] for-each-ref: tests for new atoms added Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 20/24] ref-filter: unifying formatting of cat-file opts Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 17/24] cat-file: reuse printing logic from ref-filter Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 19/24] ref-filter: make populate_value internal again Olga Telezhnaya
2018-01-26 19:43 ` [PATCH RFC 23/24] cat-file: tests for new atoms added Olga Telezhnaya
2018-01-26 20:19 ` [PATCH RFC 01/24] ref-filter: get rid of goto Junio C Hamano
2018-01-29  7:13   ` Оля Тележная
2018-01-30 20:49     ` Junio C Hamano
2018-01-31  6:39       ` Оля Тележная
2018-02-05 11:27 ` [PATCH RFC v2 01/25] " Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 05/25] cat-file: move struct expand_data into ref-filter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 24/25] cat-file: tests for new atoms added Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 10/25] ref-filter: make populate_value() global Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 25/25] cat-file: update of docs Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 06/25] cat-file: split expand_atom() into 2 functions Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 11/25] ref-filter: rename field in ref_array_item stuct Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 20/25] ref-filter: make populate_value() internal again Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 16/25] cat-file: move skip_object_info into ref-filter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 14/25] ref-filter: add is_cat flag Olga Telezhnaya
2018-02-05 21:19     ` Junio C Hamano
2018-02-05 11:27   ` [PATCH RFC v2 08/25] ref-filter: reuse parse_ref_filter_atom() Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 07/25] cat-file: start migrating formatting to ref-filter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 17/25] ref-filter: make cat_file_info independent Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 15/25] ref_filter: add is_atom_used function Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 03/25] cat-file: reuse struct ref_format Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 22/25] ref-filter: work with objectsize:disk Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 12/25] cat-file: start reusing populate_value() Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 04/25] ref-filter: make valid_atom as function parameter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 21/25] ref-filter: unifying formatting of cat-file opts Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 13/25] ref-filter: get rid of mark_atom_in_object_info() Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 18/25] ref-filter: make valid_atom general again Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 23/25] for-each-ref: tests for new atoms added Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 19/25] cat-file: reuse printing logic from ref-filter Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 02/25] ref-filter: add return value to some functions Olga Telezhnaya
2018-02-05 11:27   ` [PATCH RFC v2 09/25] cat-file: start use ref_array_item struct Olga Telezhnaya
2018-02-12  8:08   ` [PATCH v3 01/23] ref-filter: get rid of goto Olga Telezhnaya
2018-02-12  8:08     ` [PATCH v3 20/23] ref-filter: unifying formatting of cat-file opts Olga Telezhnaya
2018-02-15  5:56       ` Jeff King
2018-02-15 10:34         ` Оля Тележная
2018-02-15 18:31           ` Junio C Hamano
2018-02-12  8:08     ` [PATCH v3 12/23] cat-file: start reusing populate_value() Olga Telezhnaya
2018-02-15  5:42       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 11/23] ref-filter: rename field in ref_array_item stuct Olga Telezhnaya
2018-02-12  8:08     ` [PATCH v3 05/23] cat-file: move struct expand_data into ref-filter Olga Telezhnaya
2018-02-15  5:26       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 16/23] ref-filter: make cat_file_info independent Olga Telezhnaya
2018-02-15  5:53       ` Jeff King
2018-02-15 10:33         ` Оля Тележная
2018-02-16 21:54           ` Jeff King
2018-02-12  8:08     ` [PATCH v3 22/23] cat-file: tests for new atoms added Olga Telezhnaya
2018-02-16 14:55       ` Adam Dinwoodie
2018-02-18 22:55         ` Ramsay Jones
2018-02-19  1:04           ` Ramsay Jones
2018-02-12  8:08     ` [PATCH v3 04/23] ref-filter: make valid_atom as function parameter Olga Telezhnaya
2018-02-15  5:23       ` Jeff King
2018-02-15 10:03         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 15/23] cat-file: move skip_object_info into ref-filter Olga Telezhnaya
2018-02-15  5:51       ` Jeff King
2018-02-15 10:27         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 10/23] ref-filter: make populate_value() global Olga Telezhnaya
2018-02-12  8:08     ` [PATCH v3 07/23] cat-file: start migrating formatting to ref-filter Olga Telezhnaya
2018-02-15  5:32       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 14/23] ref_filter: add is_atom_used function Olga Telezhnaya
2018-02-15  5:49       ` Jeff King
2018-02-15 10:20         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 18/23] cat-file: reuse printing logic from ref-filter Olga Telezhnaya
2018-02-12  8:08     ` [PATCH v3 17/23] ref-filter: make valid_atom general again Olga Telezhnaya
2018-02-15  5:53       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 21/23] for-each-ref: tests for new atoms added Olga Telezhnaya
2018-02-15  5:57       ` Jeff King
2018-02-15 10:38         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 23/23] cat-file: update of docs Olga Telezhnaya
2018-02-15  6:00       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 03/23] cat-file: reuse struct ref_format Olga Telezhnaya
2018-02-15  5:18       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 09/23] cat-file: start use ref_array_item struct Olga Telezhnaya
2018-02-15  5:40       ` Jeff King
2018-02-15 10:13         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 06/23] cat-file: split expand_atom() into 2 functions Olga Telezhnaya
2018-02-15  5:28       ` Jeff King
2018-02-12  8:08     ` [PATCH v3 13/23] ref-filter: get rid of mark_atom_in_object_info() Olga Telezhnaya
2018-02-15  5:45       ` Jeff King
2018-02-15 10:19         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 08/23] ref-filter: reuse parse_ref_filter_atom() Olga Telezhnaya
2018-02-15  5:37       ` Jeff King
2018-02-15 10:11         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 02/23] ref-filter: add return value to some functions Olga Telezhnaya
2018-02-15  5:16       ` Jeff King
2018-02-15  9:59         ` Оля Тележная
2018-02-12  8:08     ` [PATCH v3 19/23] ref-filter: make populate_value() internal again Olga Telezhnaya
2018-02-15  5:08     ` [PATCH v3 01/23] ref-filter: get rid of goto Jeff King

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