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From: Christian Couder <christian.couder@gmail.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git <git@vger.kernel.org>, Junio C Hamano <gitster@pobox.com>,
	Anders Waldenborg <anders@0x63.nu>, Jeff King <peff@peff.net>,
	Jonathan Tan <jonathantanmy@google.com>
Subject: Re: [PATCH 3/5] pretty format %(trailers): add a "keyonly"
Date: Sat, 5 Dec 2020 07:11:31 +0100	[thread overview]
Message-ID: <CAP8UFD1gTOKLs55ceVwsDW=uSyW4wx_9eF9Wra5KVP8B19Jx_Q@mail.gmail.com> (raw)
In-Reply-To: <20201205013918.18981-4-avarab@gmail.com>

On Sat, Dec 5, 2020 at 2:39 AM Ævar Arnfjörð Bjarmason <avarab@gmail.com> wrote:
>
> Add support for a "keyonly". This allows for easier parsing out of the
> key and value. Before if you didn't want to make assumptions about how
> the key was formatted. You'd need to parse it out as e.g.:
>
>     --pretty=format:'%H%x00%(trailers:separator=%x00%x00)' \
>                        '%x00%(trailers:separator=%x00%x00,valueonly)'
>
> And then proceed to deduce keys by looking at those two and
> subtracting the value plus the hardcoded ": " separator from the
> non-valueonly %(trailers) line. Now it's possible to simply do:
>
>     --pretty=format:'%H%x00%(trailers:separator=%x00%x00,keyonly)' \
>                     '%x00%(trailers:separator=%x00%x00,valueonly)'
>
> Which at least reduces it to a state machine where you get N keys and
> correlate them with N values. Even better would be to have a way to
> change the ": " delimiter to something easily machine-readable (a key
> might contain ": " too). A follow-up change will add support for that.

Well explained.

> diff --git a/trailer.c b/trailer.c
> index b00b35ea0eb..40f31e4dfc2 100644
> --- a/trailer.c
> +++ b/trailer.c
> @@ -1233,8 +1233,11 @@ static void format_trailer_info(struct strbuf *out,
>                                 if (opts->separator && out->len != origlen)
>                                         strbuf_addbuf(out, opts->separator);
>                                 if (!opts->value_only)
> -                                       strbuf_addf(out, "%s: ", tok.buf);
> -                               strbuf_addbuf(out, &val);
> +                                       strbuf_addstr(out, tok.buf);

Maybe `strbuf_addbuf(out, &tok);`

> +                               if (!opts->key_only && !opts->value_only)
> +                                       strbuf_addstr(out, ": ");
> +                               if (!opts->key_only)
> +                                       strbuf_addbuf(out, &val);

The above is probably correct, but it feels strange to write the key
after the separator and the value, and that the key is in a variable
called "val".

  reply	other threads:[~2020-12-05  6:16 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-25 21:26 [PATCH 00/21] trailer fixes Anders Waldenborg
2020-10-25 21:26 ` [PATCH 01/21] trailer: change token_{from,matches}_item into taking conf_info Anders Waldenborg
2020-10-26 11:56   ` Christian Couder
2020-10-25 21:26 ` [PATCH 02/21] trailer: don't use 'struct arg_item' for storing config Anders Waldenborg
2020-10-25 21:26 ` [PATCH 03/21] doc: mention canonicalization in git i-t manual Anders Waldenborg
2020-10-26 12:14   ` Christian Couder
2020-10-25 21:26 ` [PATCH 04/21] pretty: allow using aliases in %(trailer:key=xyz) Anders Waldenborg
2020-10-26 12:38   ` Christian Couder
2020-10-25 21:26 ` [PATCH 05/21] trailer: rename 'free_all' to 'free_all_trailer_items' Anders Waldenborg
2020-10-26 12:42   ` Christian Couder
2020-11-10 19:52     ` Jeff King
2020-10-25 21:26 ` [PATCH 06/21] t4205: add test for trailer in log with nonstandard separator Anders Waldenborg
2020-10-26 12:43   ` Christian Couder
2020-11-09 22:12     ` Anders Waldenborg
2020-11-10  7:55       ` Christian Couder
2020-11-10 19:54       ` Jeff King
2020-10-25 21:26 ` [PATCH 07/21] trailer: simplify 'arg_item' lifetime Anders Waldenborg
2020-10-25 21:26 ` [PATCH 08/21] trailer: keep track of conf in trailer_item Anders Waldenborg
2020-11-10 19:58   ` Jeff King
2020-10-25 21:26 ` [PATCH 09/21] trailer: refactor print_tok_val into taking item Anders Waldenborg
2020-10-25 21:26 ` [PATCH 10/21] trailer: move trailer token canonicalization print time Anders Waldenborg
2020-10-25 21:26 ` [PATCH 11/21] trailer: remember separator used in input Anders Waldenborg
2020-10-25 21:26 ` [PATCH 12/21] trailer: handle configured nondefault separators explicitly Anders Waldenborg
2020-11-10 20:06   ` Jeff King
2020-10-25 21:26 ` [PATCH 13/21] trailer: add option to make canonicalization optional Anders Waldenborg
2020-11-10 20:10   ` Jeff King
2020-10-25 21:26 ` [PATCH 14/21] trailer: move skipping of blank lines to own loop when finding trailer Anders Waldenborg
2020-10-25 21:26 ` [PATCH 15/21] trailer: factor out classify_trailer_line Anders Waldenborg
2020-10-25 21:26 ` [PATCH 16/21] t7513: add failing test for configured trailing line classification Anders Waldenborg
2020-10-25 21:26 ` [PATCH 17/21] trailer: don't treat line with prefix of known trailer as known Anders Waldenborg
2020-11-10 20:16   ` Jeff King
2020-10-25 21:26 ` [PATCH 18/21] trailer: factor out config lookup to separate function Anders Waldenborg
2020-10-25 21:26 ` [PATCH 19/21] trailer: move config lookup out of parse_trailer Anders Waldenborg
2020-10-25 21:26 ` [PATCH 20/21] trailer: add failing tests for matching trailers against input Anders Waldenborg
2020-10-25 21:26 ` [PATCH 21/21] trailer: only do prefix matching for configured trailers on commandline Anders Waldenborg
2020-11-10  7:44 ` [PATCH 00/21] trailer fixes Christian Couder
2020-12-05  1:39 ` [PATCH 0/5] pretty format %(trailers): improve machine readability Ævar Arnfjörð Bjarmason
2020-12-05 18:18   ` Anders Waldenborg
2020-12-07  8:53     ` Ævar Arnfjörð Bjarmason
2020-12-06  0:24   ` [PATCH v2 " Ævar Arnfjörð Bjarmason
2020-12-09 15:52     ` [PATCH v3 " Ævar Arnfjörð Bjarmason
2020-12-10 10:48       ` Christian Couder
2020-12-10 19:00         ` Junio C Hamano
2020-12-09 15:52     ` [PATCH v3 1/5] pretty format %(trailers) test: split a long line Ævar Arnfjörð Bjarmason
2020-12-09 15:52     ` [PATCH v3 2/5] pretty format %(trailers) doc: avoid repetition Ævar Arnfjörð Bjarmason
2020-12-10 19:01       ` Junio C Hamano
2020-12-09 15:52     ` [PATCH v3 3/5] pretty-format %(trailers): fix broken standalone "valueonly" Ævar Arnfjörð Bjarmason
2020-12-09 15:52     ` [PATCH v3 4/5] pretty format %(trailers): add a "keyonly" Ævar Arnfjörð Bjarmason
2020-12-09 15:52     ` [PATCH v3 5/5] pretty format %(trailers): add a "key_value_separator" Ævar Arnfjörð Bjarmason
2020-12-06  0:24   ` [PATCH v2 1/5] pretty format %(trailers) test: split a long line Ævar Arnfjörð Bjarmason
2020-12-06  0:24   ` [PATCH v2 2/5] pretty format %(trailers) doc: avoid repetition Ævar Arnfjörð Bjarmason
2020-12-07  9:09     ` Christian Couder
2020-12-06  0:24   ` [PATCH v2 3/5] pretty-format %(trailers): fix broken standalone "valueonly" Ævar Arnfjörð Bjarmason
2020-12-06  0:24   ` [PATCH v2 4/5] pretty format %(trailers): add a "keyonly" Ævar Arnfjörð Bjarmason
2020-12-07  9:17     ` Christian Couder
2020-12-06  0:24   ` [PATCH v2 5/5] pretty format %(trailers): add a "key_value_separator" Ævar Arnfjörð Bjarmason
2020-12-05  1:39 ` [PATCH 1/5] pretty format %(trailers) test: split a long line Ævar Arnfjörð Bjarmason
2020-12-05  1:39 ` [PATCH 2/5] pretty format %(trailers): avoid needless repetition Ævar Arnfjörð Bjarmason
2020-12-05  5:43   ` Christian Couder
2020-12-05  1:39 ` [PATCH 3/5] pretty format %(trailers): add a "keyonly" Ævar Arnfjörð Bjarmason
2020-12-05  6:11   ` Christian Couder [this message]
2020-12-05 12:26     ` Ævar Arnfjörð Bjarmason
2020-12-05  1:39 ` [PATCH 4/5] pretty-format %(trailers): fix broken standalone "valueonly" Ævar Arnfjörð Bjarmason
2020-12-05  6:46   ` Christian Couder
2020-12-05  1:39 ` [PATCH 5/5] pretty format %(trailers): add a "key_value_separator" Ævar Arnfjörð Bjarmason
2020-12-05  7:13   ` Christian Couder
2020-12-05  8:49     ` Ævar Arnfjörð Bjarmason

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