t2203: add a test about "diff HEAD" case

diff --git a/builtin/diff.c b/builtin/diff.c
index 16bfb22f7381ee8e6967ab836686c5def7cff892..00424c296d19e3812115659cdc3dc82a68359e85 100644 (file)
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -352,6 +352,13 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        rev.diffopt.flags.allow_external = 1;
        rev.diffopt.flags.allow_textconv = 1;
 
+       /*
+        * Default to intent-to-add entries invisible in the
+        * index. This makes them show up as new files in diff-files
+        * and not at all in diff-cached.
+        */
+       rev.diffopt.ita_invisible_in_index = 1;
+
        if (nongit)
                die(_("Not a git repository"));
        argc = setup_revisions(argc, argv, &rev, NULL);