[PATCH v1 2/4] cat-file: avoid "too many arguments"

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Running "git cat-file -e a b c d e f g" would fail and say "too many
arguments".  By reading that message, you cannot tell if the command
could have worked if you limited the list of objects to 5 items
instead of 7, or the command is prepared to take only a single item.

Let's report that "b" is an unexpected argument instead.

Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
 builtin/cat-file.c  | 3 ++-
 t/t1006-cat-file.sh | 8 +++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 18fe58d6b8..ba85825c55 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -1074,7 +1074,8 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
 		else if (argc == 1)
 			obj_name = argv[0];
 		else
-			usage_msg_opt(_("too many arguments"), usage, options);
+			usage_msg_optf(_("unknown argument: '%s'"),
+				       usage, options, argv[1]);
 	} else if (!argc) {
 		usage_with_options(usage, options);
 	} else if (argc != 2) {
diff --git a/t/t1006-cat-file.sh b/t/t1006-cat-file.sh
index ff9bf213aa..8ad440bbcc 100755
--- a/t/t1006-cat-file.sh
+++ b/t/t1006-cat-file.sh
@@ -66,16 +66,18 @@ do
 	done
 done
 
-test_too_many_arguments () {
+test_unknown_arg () {
+	unk=$1
+	shift
 	test_expect_code 129 "$@" 2>err &&
-	grep -E "^fatal: too many arguments$" err
+	grep -E "^fatal: unknown argument: '$unk'" err
 }
 
 for opt in $short_modes $cw_modes
 do
 	args="one two three"
 	test_expect_success "usage: too many arguments: $opt $args" '
-		test_too_many_arguments git cat-file $opt $args
+		test_unknown_arg two git cat-file $opt $args
 	'
 
 	for opt2 in --buffer --follow-symlinks
-- 
2.46.0-235-g968ce1ce0e





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