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From: Taylor Blau <me@ttaylorr.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
	Derrick Stolee <stolee@gmail.com>, Taylor Blau <me@ttaylorr.com>,
	Andrei Rybak <rybak.a.v@gmail.com>
Subject: Re: [PATCH v3 5/6] commit-graph: early exit to "usage" on !argc
Date: Tue, 20 Jul 2021 14:17:45 -0400	[thread overview]
Message-ID: <YPcTSSUtEuG41knv@nand.local> (raw)
In-Reply-To: <patch-5.6-7acb4bd75ce-20210720T113707Z-avarab@gmail.com>

On Tue, Jul 20, 2021 at 01:39:44PM +0200, Ævar Arnfjörð Bjarmason wrote:
> Rather than guarding all of the !argc with an additional "if" arm
> let's do an early goto to "usage". This also makes it clear that
> "save_commit_buffer" is not needed in this case.
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
>  builtin/commit-graph.c | 13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
> index 6e49184439f..bf34aa43f22 100644
> --- a/builtin/commit-graph.c
> +++ b/builtin/commit-graph.c
> @@ -331,16 +331,17 @@ int cmd_commit_graph(int argc, const char **argv, const char *prefix)
>  			     builtin_commit_graph_options,
>  			     builtin_commit_graph_usage,
>  			     PARSE_OPT_STOP_AT_NON_OPTION);
> +	if (!argc)
> +		goto usage;
>
>  	save_commit_buffer = 0;
>
> -	if (argc > 0) {
> -		if (!strcmp(argv[0], "verify"))
> -			return graph_verify(argc, argv);
> -		if (!strcmp(argv[0], "write"))
> -			return graph_write(argc, argv);
> -	}
> +	if (!strcmp(argv[0], "verify"))
> +		return graph_verify(argc, argv);
> +	else if (argc && !strcmp(argv[0], "write"))
> +		return graph_write(argc, argv);

Nice, what you wrote here is definitely an improvement in readability.
This could potentially also have an else like I suggested in the
multi-pack-index patch earlier (later?) in the thread. Maybe something
like:

      else if (strcmp(argv[0], "..."))
        return graph_xyz(...);
      else
        error(_("unrecognized subcommand: %s"), argv[0]);
    usage:
        usage_with_options(...);

Arguably that could be done in this patch, separately, or not at all
;).

Thanks,
Taylor

  reply	other threads:[~2021-07-20 18:21 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-18  7:58 [PATCH v2 0/5] commit-graph: usage fixes Ævar Arnfjörð Bjarmason
2021-07-18  7:58 ` [PATCH v2 1/5] commit-graph: define common usage with a macro Ævar Arnfjörð Bjarmason
2021-07-19 16:29   ` Taylor Blau
2021-07-18  7:58 ` [PATCH v2 2/5] commit-graph: remove redundant handling of -h Ævar Arnfjörð Bjarmason
2021-07-18 12:55   ` Andrei Rybak
2021-07-19 16:34     ` Taylor Blau
2021-07-18  7:58 ` [PATCH v2 3/5] commit-graph: use parse_options_concat() Ævar Arnfjörð Bjarmason
2021-07-19 16:50   ` Taylor Blau
2021-07-20 11:31     ` Ævar Arnfjörð Bjarmason
2021-07-18  7:58 ` [PATCH v2 4/5] commit-graph: early exit to "usage" on !argc Ævar Arnfjörð Bjarmason
2021-07-19 16:55   ` Taylor Blau
2021-07-18  7:58 ` [PATCH v2 5/5] commit-graph: show usage on "commit-graph [write|verify] garbage" Ævar Arnfjörð Bjarmason
2021-07-19 16:53   ` Taylor Blau
2021-07-20 11:39 ` [PATCH v3 0/6] commit-graph: usage fixes Ævar Arnfjörð Bjarmason
2021-07-20 11:39   ` [PATCH v3 1/6] commit-graph: define common usage with a macro Ævar Arnfjörð Bjarmason
2021-07-20 11:39   ` [PATCH v3 2/6] commit-graph: remove redundant handling of -h Ævar Arnfjörð Bjarmason
2021-07-20 11:39   ` [PATCH v3 3/6] commit-graph: use parse_options_concat() Ævar Arnfjörð Bjarmason
2021-07-20 11:39   ` [PATCH v3 4/6] multi-pack-index: refactor "goto usage" pattern Ævar Arnfjörð Bjarmason
2021-07-20 18:14     ` Taylor Blau
2021-07-20 11:39   ` [PATCH v3 5/6] commit-graph: early exit to "usage" on !argc Ævar Arnfjörð Bjarmason
2021-07-20 18:17     ` Taylor Blau [this message]
2021-07-20 11:39   ` [PATCH v3 6/6] commit-graph: show usage on "commit-graph [write|verify] garbage" Ævar Arnfjörð Bjarmason
2021-07-20 17:47     ` SZEDER Gábor
2021-07-20 17:55       ` SZEDER Gábor
2021-07-20 18:24         ` Taylor Blau
2021-07-20 21:17           ` Ævar Arnfjörð Bjarmason
2021-07-20 21:47             ` Taylor Blau
2021-07-21  7:26               ` Ævar Arnfjörð Bjarmason
2021-07-21  8:08                 ` Jeff King
2021-07-21 16:54                   ` Junio C Hamano
2021-08-23 12:30   ` [PATCH v4 0/7] commit-graph: usage fixes Ævar Arnfjörð Bjarmason
2021-08-23 12:30     ` [PATCH v4 1/7] commit-graph: define common usage with a macro Ævar Arnfjörð Bjarmason
2021-08-23 12:30     ` [PATCH v4 2/7] commit-graph: remove redundant handling of -h Ævar Arnfjörð Bjarmason
2021-08-23 12:30     ` [PATCH v4 3/7] commit-graph: use parse_options_concat() Ævar Arnfjörð Bjarmason
2021-08-23 12:30     ` [PATCH v4 4/7] multi-pack-index: refactor "goto usage" pattern Ævar Arnfjörð Bjarmason
2021-08-23 12:30     ` [PATCH v4 5/7] commit-graph: early exit to "usage" on !argc Ævar Arnfjörð Bjarmason
2021-08-23 12:30     ` [PATCH v4 6/7] commit-graph: show usage on "commit-graph [write|verify] garbage" Ævar Arnfjörð Bjarmason
2021-08-23 12:30     ` [PATCH v4 7/7] commit-graph: show "unexpected subcommand" error Ævar Arnfjörð Bjarmason
2021-08-30 23:54     ` [PATCH v4 0/7] commit-graph: usage fixes Taylor Blau
2021-08-30 23:58       ` Junio C Hamano

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