dir.c: git-ls-files --directories: don't hide empty directories

'git-ls-files --ignored --directories' hides empty directories even though
--no-empty-directory was not specified.

Treat the DIR_HIDE_EMPTY_DIRECTORIES flag independently from
DIR_SHOW_IGNORED to make all git-ls-files options work as expected.
Signed-off-by: NKarsten Blees <blees@dcon.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

dir.c

@@ -1120,15 +1120,13 @@ static enum directory_treatment treat_directory(struct dir_struct *dir,
 	if ((dir->flags & DIR_SHOW_IGNORED) && !exclude) {
 		int ignored;
 		dir->flags &= ~DIR_SHOW_IGNORED;
-		dir->flags |= DIR_HIDE_EMPTY_DIRECTORIES;
 		ignored = read_directory_recursive(dir, dirname, len, 1, simplify);
-		dir->flags &= ~DIR_HIDE_EMPTY_DIRECTORIES;
 		dir->flags |= DIR_SHOW_IGNORED;
 
 		return ignored ? ignore_directory : show_directory;
 	}
-	if (!(dir->flags & DIR_SHOW_IGNORED) &&
-	    !(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
+
+	if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
 		return show_directory;
 	if (!read_directory_recursive(dir, dirname, len, 1, simplify))
 		return ignore_directory;

t/t3001-ls-files-others-exclude.sh

@@ -214,6 +214,29 @@ test_expect_success 'subdirectory ignore (l1)' '
 	test_cmp expect actual
 '
 
+test_expect_success 'show/hide empty ignored directory (setup)' '
+	rm top/l1/l2/l1 &&
+	rm top/l1/.gitignore
+'
+
+test_expect_success 'show empty ignored directory with --directory' '
+	(
+		cd top &&
+		git ls-files -o -i --exclude l1 --directory
+	) >actual &&
+	echo l1/ >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'hide empty ignored directory with --no-empty-directory' '
+	(
+		cd top &&
+		git ls-files -o -i --exclude l1 --directory --no-empty-directory
+	) >actual &&
+	>expect &&
+	test_cmp expect actual
+'
+
 test_expect_success 'pattern matches prefix completely' '
 	: >expect &&
 	git ls-files -i -o --exclude "/three/a.3[abc]" >actual &&

wt-status.c

@@ -526,7 +526,7 @@ static void wt_status_collect_untracked(struct wt_status *s)
 		dir.nr = 0;
 		dir.flags = DIR_SHOW_IGNORED;
 		if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
-			dir.flags |= DIR_SHOW_OTHER_DIRECTORIES;
+			dir.flags |= DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
 		fill_directory(&dir, s->pathspec);
 		for (i = 0; i < dir.nr; i++) {
 			struct dir_entry *ent = dir.entries[i];