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config: really treat missing optional path as not configured

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These callers expect that git_config_pathname() that returns 0 is a
signal that the variable they passed has a string they need to act
on.  But with the introduction of ":(optional)path" earlier, that is
no longer the case.  If the path specified by the configuration
variable is missing, their variable will get a NULL in it, and they
need to act on it (often, just refraining from copying it elsewhere).

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano
2025-11-20 11:45:35 -08:00
parent ce1a5a22a5
commit 0bd16856ff
6 changed files with 25 additions and 12 deletions
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5
fetch-pack.c
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@@ -1872,8 +1872,9 @@ int fetch_pack_fsck_config(const char *var, const char *value,
if (git_config_pathname(&path, var, value))
return -1;
strbuf_addf(msg_types, "%cskiplist=%s",
msg_types->len ? ',' : '=', path);
if (path)
strbuf_addf(msg_types, "%cskiplist=%s",
msg_types->len ? ',' : '=', path);
free(path);
return 0;
}