try using codecs instead

yamllint/cli.py

@@ -17,18 +17,31 @@
 from __future__ import print_function
 
 import argparse
+import codecs
 import io
 import os
 import platform
 import sys
 
-import yaml
 from yamllint import APP_DESCRIPTION, APP_NAME, APP_VERSION
 from yamllint import linter
 from yamllint.config import YamlLintConfig, YamlLintConfigError
 from yamllint.linter import PROBLEM_LEVELS
 
 
+def determine_encoding(file_path):
+    with open(file_path, 'rb')
+    if isinstance(self.raw_buffer, bytes):
+        if self.raw_buffer.startswith(codecs.BOM_UTF16_LE):
+            self.raw_decode = codecs.utf_16_le_decode
+            self.encoding = 'utf-16-le'
+        elif self.raw_buffer.startswith(codecs.BOM_UTF16_BE):
+            self.raw_decode = codecs.utf_16_be_decode
+            self.encoding = 'utf-16-be'
+        else:
+            self.raw_decode = codecs.utf_8_decode
+            self.encoding = 'utf-8'
+
 def find_files_recursively(items, conf):
     for item in items:
         if os.path.isdir(item):
@@ -178,9 +191,8 @@ def run(argv=None):
     for file in find_files_recursively(args.files, conf):
         filepath = file[2:] if file.startswith('./') else file
         try:
-            with io.open(file, mode='rb') as f:
-                buff = yaml.BaseLoader(f).buffer
-                problems = linter.run(buff, conf, filepath)
+            with codecs.open(file) as f:
+                problems = linter.run(f, conf, filepath)
         except EnvironmentError as e:
             print(e, file=sys.stderr)
             sys.exit(-1)