git: show alias info only with lone -h

Builtin commands show usage information on stdout if called with -h as
their only option, usage.c::show_usage_if_asked() makes sure of that.

Aliases show alias information on stderr if called with -h as the first
option since a9a60b94cc (git.c: handle_alias: prepend alias info when
first argument is -h, 2018-10-09).  This is surprising when using
aliases for commands that take -h as a normal argument among others,
like git grep.

Tighten the condition and show the alias information only if -h is the
only option given, to be consistent with builtins.

It's probably still is a good idea to write to stderr, as an alias
command doesn't have to be a builtin and could instead produce output
with just -h that might be spoiled by an extra alias info line.

Reported-by: Kevin Brodsky <kevin.brodsky@arm.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
René Scharfe 2025-07-25 20:41:24 +02:00 committed by Junio C Hamano
parent e4ef0485fd
commit 161e895e42
1 changed files with 1 additions and 1 deletions

2
git.c
View File

@ -371,7 +371,7 @@ static int handle_alias(struct strvec *args)
alias_command = args->v[0]; alias_command = args->v[0];
alias_string = alias_lookup(alias_command); alias_string = alias_lookup(alias_command);
if (alias_string) { if (alias_string) {
if (args->nr > 1 && !strcmp(args->v[1], "-h")) if (args->nr == 2 && !strcmp(args->v[1], "-h"))
fprintf_ln(stderr, _("'%s' is aliased to '%s'"), fprintf_ln(stderr, _("'%s' is aliased to '%s'"),
alias_command, alias_string); alias_command, alias_string);
if (alias_string[0] == '!') { if (alias_string[0] == '!') {