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multi-pack-index: avoid writing to global in option callback

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We declare the --object-dir option like:

  OPT_CALLBACK(0, "object-dir", &opts.object_dir, ...);

but the pointer to opts.object_dir is completely unused. Instead, the
callback writes directly to a global. Which fortunately happens to be
opts.object_dir. So everything works as expected, but it's unnecessarily
confusing.

Instead, let's have the callback write to the option value pointer that
has been passed in. This also quiets a -Wunused-parameter warning (since
we don't otherwise look at "opt").

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2022-10-06 09:10:53 -04:00 committed by Junio C Hamano
parent 6823c19888
commit 7faba18a9a
1 changed files with 4 additions and 3 deletions
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7
builtin/multi-pack-index.c
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@ -56,11 +56,12 @@ static struct opts_multi_pack_index {
static int parse_object_dir(const struct option *opt, const char *arg,
int unset)
{
free(opts.object_dir);
char **value = opt->value;
free(*value);
if (unset)
opts.object_dir = xstrdup(get_object_directory());
*value = xstrdup(get_object_directory());
else
opts.object_dir = real_pathdup(arg, 1);
*value = real_pathdup(arg, 1);
return 0;
}