state: use str representations for inode and mtime

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

dvc/state.py

@@ -1,5 +1,6 @@
 import os
 import json
+import nanotime
 from checksumdir import dirhash
 
 from dvc.system import System
@@ -70,9 +71,17 @@ class State(object):
         with open(self.state_file, 'w+') as fd:
             json.dump(self._db, fd)
 
+    @staticmethod
+    def mtime(path):
+        return str(int(nanotime.timestamp(os.path.getmtime(path))))
+
+    @staticmethod
+    def inode(path):
+        return str(System.inode(path))
+
     def update(self, path, dump=True):
-        mtime = os.path.getmtime(path)
-        inode = System.inode(path)
+        mtime = self.mtime(path)
+        inode = self.inode(path)
 
         md5 = self._get(inode, mtime)
         if md5:
@@ -100,7 +109,7 @@ class State(object):
         return None
 
     def get(self, path):
-        mtime = os.path.getmtime(path)
-        inode = System.inode(path)
+        mtime = self.mtime(path)
+        inode = self.inode(path)
 
         return self._get(inode, mtime)

requirements.txt

@@ -13,3 +13,4 @@ gitpython>=2.1.8
 ntfsutils>=0.1.3
 checksumdir>=1.1.4
 setuptools>=34.0.0
+nanotime>=0.5.2

setup.py

@@ -18,6 +18,7 @@ install_requires = [
     "ntfsutils>=0.1.3",
     "checksumdir>=1.1.4",
     "setuptools>=34.0.0",
+    "nanotime>=0.5.2",
 ]
 
 setup(