Function run_diff

add-interactive.c:938–981

}

static int run_diff(struct add_i_state *s, const struct pathspec *ps,
		    struct prefix_item_list *files,
		    struct list_and_choose_options *opts)
{
	int res = 0;
	ssize_t count, i;

	struct object_id oid;
	int is_initial = !refs_resolve_ref_unsafe(get_main_ref_store(s->r),
						  "HEAD", RESOLVE_REF_READING,
						  &oid,
						  NULL);
	if (get_modified_files(s->r, INDEX_ONLY, files, ps, NULL, NULL) < 0)
		return -1;

	if (!files->items.nr) {
		putchar('\n');
		return 0;
	}

	opts->prompt = N_("Review diff");
	opts->flags = IMMEDIATE;
	count = list_and_choose(s, files, opts);
	opts->flags = 0;
	if (count > 0) {
		struct child_process cmd = CHILD_PROCESS_INIT;

		strvec_pushl(&cmd.args, "git", "diff", "-p", "--cached", NULL);
		if (s->cfg.context != -1)
			strvec_pushf(&cmd.args, "--unified=%i", s->cfg.context);
		if (s->cfg.interhunkcontext != -1)
			strvec_pushf(&cmd.args, "--inter-hunk-context=%i", s->cfg.interhunkcontext);
		strvec_pushl(&cmd.args, oid_to_hex(!is_initial ? &oid :
			     s->r->hash_algo->empty_tree), "--", NULL);
		for (i = 0; i < files->items.nr; i++)
			if (files->selected[i])
				strvec_push(&cmd.args,
					    files->items.items[i].string);
		res = run_command(&cmd);
	}

	putchar('\n');
	return res;
}

static int run_help(struct add_i_state *s, const struct pathspec *ps UNUSED,
		    struct prefix_item_list *files UNUSED,