diff- and log- family: handle "git cmd -h" early

diff --git a/builtin/diff-index.c b/builtin/diff-index.c
index 1af373d0021f56f539a1d261e908a60d92ff5b4f..02dd35ba456ed4e0d12d4a1fe8fd58f0c4d406a1 100644 (file)
--- a/builtin/diff-index.c
+++ b/builtin/diff-index.c
@@ -17,6 +17,9 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix)
        int i;
        int result;
 
+       if (argc == 2 && !strcmp(argv[1], "-h"))
+               usage(diff_cache_usage);
+
        init_revisions(&rev, prefix);
        gitmodules_config();
        git_config(git_diff_basic_config, NULL); /* no "diff" UI options */