1 file changed, 9 insertions, 7 deletions

diff --git a/source/ui-diff.c b/source/ui-diff.c
index b34f7b3..ab40566 100644
--- a/source/ui-diff.c
+++ b/source/ui-diff.c
@@ -424,11 +424,15 @@ void cgit_print_diff(const char *new_rev, const char *old_rev,
 	const struct object_id *old_tree_oid, *new_tree_oid;
 	diff_type difftype;
 
-	/*
-	 * If "follow" is set then the diff machinery needs to examine the
-	 * entire commit to detect renames so we must limit the paths in our
-	 * own callbacks and not pass the prefix to the diff machinery.
-	 */
+	// A path-limited diff is naturally bounded, so the size caps only
+	// apply to a whole-commit diff. Decide that from the caller's prefix
+	// before the follow logic rewrites it to "", otherwise follow=1
+	// silently disables the caps.
+	cap_diffs = !prefix;
+
+	// If "follow" is set then the diff machinery needs to examine the
+	// entire commit to detect renames so we must limit the paths in our
+	// own callbacks and not pass the prefix to the diff machinery.
 	if (ctx.qry.follow && ctx.repo->enable_follow_links) {
 		current_prefix = prefix;
 		prefix = "";
@@ -436,8 +440,6 @@ void cgit_print_diff(const char *new_rev, const char *old_rev,
 		current_prefix = NULL;
 	}
 
-	cap_diffs = !prefix && !current_prefix;
-
 	if (!new_rev)
 		new_rev = ctx.qry.head;
 	if (repo_get_oid(the_repository, new_rev, new_rev_oid)) {