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merge: do not pass unused opt->value parameter

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The option_parse_strategy() callback does not look at opt->value;
instead it calls append_strategy(), which manipulates the global
use_strategies array directly. But the OPT_CALLBACK declaration assigns
"&use_strategies" to opt->value.

One could argue this is good, as it tells the reader what we generally
expect the callback to do. But it is also bad, because it can mislead
you into thinking that swapping out "&use_strategies" there might have
any effect. Let's switch it to pass NULL (which is what every other
"does not bother to look at opt->value" callback does). If you want to
know what the callback does, it's easy to read the function itself.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2023-08-31 17:21:46 -04:00 committed by Junio C Hamano
parent 34bf44f2d5
commit 62c5358a5e
1 changed files with 1 additions and 1 deletions
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builtin/merge.c
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@ -264,7 +264,7 @@ static struct option builtin_merge_options[] = {
OPT_RERERE_AUTOUPDATE(&allow_rerere_auto),
OPT_BOOL(0, "verify-signatures", &verify_signatures,
N_("verify that the named commit has a valid GPG signature")),
OPT_CALLBACK('s', "strategy", &use_strategies, N_("strategy"),
OPT_CALLBACK('s', "strategy", NULL, N_("strategy"),
N_("merge strategy to use"), option_parse_strategy),
OPT_STRVEC('X', "strategy-option", &xopts, N_("option=value"),
N_("option for selected merge strategy")),