[PATCH v2 06/15] builtin/multi-pack-index.c: display usage on unrecognized command

When given a sub-command that it doesn't understand, 'git
multi-pack-index' dies with the following message:

    $ git multi-pack-index bogus
    fatal: unrecognized subcommand: bogus

Instead of 'die()'-ing, we can display the usage text, which is much
more helpful:

    $ git.compile multi-pack-index bogus
    usage: git multi-pack-index [<options>] write
       or: git multi-pack-index [<options>] verify
       or: git multi-pack-index [<options>] expire
       or: git multi-pack-index [<options>] repack [--batch-size=<size>]

	--object-dir <file>   object directory containing set of packfile and pack-index pairs
	--progress            force progress reporting

While we're at it, clean up some duplication between the "no sub-command"
and "unrecognized sub-command" conditionals.

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
Signed-off-by: Taylor Blau <redacted>
---
 builtin/multi-pack-index.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/builtin/multi-pack-index.c b/builtin/multi-pack-index.c
index 9fdfe168c2..5b05e5ce39 100644
--- a/builtin/multi-pack-index.c
+++ b/builtin/multi-pack-index.c

@@ -153,8 +153,7 @@ int cmd_multi_pack_index(int argc, const char **argv,
 		opts.object_dir = get_object_directory();
 
 	if (argc == 0)
-		usage_with_options(builtin_multi_pack_index_usage,
-				   builtin_multi_pack_index_options);
+		goto usage;
 
 	if (!strcmp(argv[0], "repack"))
 		return cmd_multi_pack_index_repack(argc, argv);

@@ -165,5 +164,7 @@ int cmd_multi_pack_index(int argc, const char **argv,
 	else if (!strcmp(argv[0], "expire"))
 		return cmd_multi_pack_index_expire(argc, argv);
 	else
-		die(_("unrecognized subcommand: %s"), argv[0]);
+usage:
+		usage_with_options(builtin_multi_pack_index_usage,
+				   builtin_multi_pack_index_options);
 }

-- 
2.30.0.667.g81c0cbc6fd