Fix "git log --stat": make sure to set recursive with --stat.

Just like "patch" format always needs recursive, "diffstat"
format does not make sense without setting recursive.

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/diff.c b/diff.c
index b54bbfa627..d75e0178ff 100644
--- a/diff.c
+++ b/diff.c
@@ -1029,6 +1029,15 @@ int diff_setup_done(struct diff_options *options)
 	     options->detect_rename != DIFF_DETECT_COPY) ||
 	    (0 <= options->rename_limit && !options->detect_rename))
 		return -1;
+
+	/*
+	 * These cases always need recursive; we do not drop caller-supplied
+	 * recursive bits for other formats here.
+	 */
+	if ((options->output_format == DIFF_FORMAT_PATCH) ||
+	    (options->output_format == DIFF_FORMAT_DIFFSTAT))
+		options->recursive = 1;
+
 	if (options->detect_rename && options->rename_limit < 0)
 		options->rename_limit = diff_rename_limit_default;
 	if (options->setup & DIFF_SETUP_USE_CACHE) {