utils: use dict_md5

Signed-off-by: Ruslan Kuprieiev <[email protected]>

dvc/state.py

@@ -5,7 +5,7 @@ import threading
 
 from dvc.system import System
 from dvc.output import Output
-from dvc.utils import file_md5, bytes_md5
+from dvc.utils import file_md5, dict_md5
 from dvc.exceptions import DvcException
 
 
@@ -70,9 +70,7 @@ class State(object):
     def compute_md5(self, path):
         if os.path.isdir(path):
             dir_info = self.collect_dir(path)
-            byts = json.dumps(dir_info, sort_keys=True).encode('utf-8')
-            md5 = bytes_md5(byts)
-            return md5 + Output.MD5_DIR_SUFFIX
+            return dict_md5(dir_info) + Output.MD5_DIR_SUFFIX
         else:
             return file_md5(path)[0]
 

dvc/utils.py

@@ -3,6 +3,7 @@ Helpers for other modules.
 """
 import os
 import re
+import json
 import stat
 import shutil
 import hashlib
@@ -34,6 +35,11 @@ def bytes_md5(byts):
     return hasher.hexdigest()
 
 
+def dict_md5(d):
+    byts = json.dumps(d, sort_keys=True).encode('utf-8')
+    return bytes_md5(byts)
+
+
 def cached_property(func):
     '''A decorator for caching properties in classes.'''
     def get(self):