"diff --check" should affect exit status

diff --git a/builtin-diff-index.c b/builtin-diff-index.c
index 556c506bfa7b5c5ef739d4203c585412a2764073..532b284b10072171c1ca198bd6357780f4579118 100644 (file)
--- a/builtin-diff-index.c
+++ b/builtin-diff-index.c
@@ -46,5 +46,7 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix)
        result = run_diff_index(&rev, cached);
        if (DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS))
                return DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES) != 0;
+       if (rev.diffopt.output_format & DIFF_FORMAT_CHECKDIFF)
+               return DIFF_OPT_TST(&rev.diffopt, CHECK_FAILED) != 0;
        return result;
 }