merge -h: show usage even with corrupt index

Part of a campaign to make sure "git <command> -h" works correctly
when run from distractingly bad repositories.

[jn: with rewritten log message and tests]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/merge.c b/builtin/merge.c
index 5f65c0c8a6eacd4c6d05602ad9de2821ec62a034..584c94f6fbc6bc474ac2b2bf35f0048ea58943e4 100644 (file)
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -909,6 +909,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        const char *best_strategy = NULL, *wt_strategy = NULL;
        struct commit_list **remotes = &remoteheads;
 
+       if (argc == 2 && !strcmp(argv[1], "-h"))
+               usage_with_options(builtin_merge_usage, builtin_merge_options);
        if (read_cache_unmerged()) {
                die_resolve_conflict("merge");
        }

diff --git a/t/t7600-merge.sh b/t/t7600-merge.sh
index b4f40e4c3a53388e72347e8e3894edd05f17dab5..b147a1bd69e96e48d3808028a3775a609471639a 100755 (executable)
--- a/t/t7600-merge.sh
+++ b/t/t7600-merge.sh
@@ -144,6 +144,17 @@ test_expect_success 'test option parsing' '
        test_must_fail git merge
 '
 
+test_expect_success 'merge -h with invalid index' '
+       mkdir broken &&
+       (
+               cd broken &&
+               git init &&
+               >.git/index &&
+               test_expect_code 129 git merge -h 2>usage
+       ) &&
+       grep "[Uu]sage: git merge" broken/usage
+'
+
 test_expect_success 'reject non-strategy with a git-merge-foo name' '
        test_must_fail git merge -s index c1
 '