fix: ignore list not being used when passing files/directories as arguments

tests/test_config.py

@@ -833,13 +833,36 @@ def test_run_with_ignore_on_ignored_file(self):
                     '    ignore: file-at-root.yaml\n')
 
         sys.stdout = StringIO()
+        sys.stderr = StringIO()
         with self.assertRaises(SystemExit):
             cli.run(('-f', 'parsable', 'file.dont-lint-me.yaml',
                      'file-at-root.yaml'))
         self.assertEqual(
             sys.stdout.getvalue().strip(),
             'file-at-root.yaml:4:17: [error] trailing spaces (trailing-spaces)'
         )
+        self.assertIn('file.dont-lint-me.yaml', sys.stderr.getvalue())
+        self.assertIn('ignore list', sys.stderr.getvalue())
+        sys.stderr = sys.__stderr__
+
+    def test_run_with_ignore_on_ignored_dir(self):
+        path = os.path.join(self.wd, '.yamllint')
+        with open(path, 'w', encoding='utf_8') as f:
+            f.write('ignore: ign-dup\n'
+                    'rules:\n'
+                    '  trailing-spaces: enable\n')
+
+        sys.stdout = StringIO()
+        sys.stderr = StringIO()
+        with self.assertRaises(SystemExit):
+            cli.run(('-f', 'parsable', 'ign-dup', 'file-at-root.yaml'))
+        self.assertEqual(
+            sys.stdout.getvalue().strip(),
+            'file-at-root.yaml:4:17: [error] trailing spaces (trailing-spaces)'
+        )
+        self.assertIn('ign-dup', sys.stderr.getvalue())
+        self.assertIn('ignore list', sys.stderr.getvalue())
+        sys.stderr = sys.__stderr__
 
     def create_ignore_file(self, text, codec):
         path = os.path.join(self.wd, f'{codec}.ignore')

yamllint/cli.py

@@ -27,12 +27,19 @@
 def find_files_recursively(items, conf):
     for item in items:
         if os.path.isdir(item):
+            if conf.is_file_ignored(item):
+                print(f'warning: ignoring {item!r}: it is on the ignore list',
+                      file=sys.stderr)
+                continue
             for root, _dirnames, filenames in os.walk(item):
                 for f in filenames:
                     filepath = os.path.join(root, f)
                     if (conf.is_yaml_file(filepath) and
                             not conf.is_file_ignored(filepath)):
                         yield filepath
+        elif conf.is_file_ignored(item):
+            print(f'warning: ignoring {item!r}: it is on the ignore list',
+                  file=sys.stderr)
         else:
             yield item
 
@@ -210,8 +217,7 @@ def run(argv=None):
 
     if args.list_files:
         for file in find_files_recursively(args.files, conf):
-            if not conf.is_file_ignored(file):
-                print(file)
+            print(file)
         sys.exit(0)
 
     max_level = 0