dvc: properly save symlinks

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

dvc/system.py

@@ -61,7 +61,7 @@ class System(object):
     @staticmethod
     def inode(path):
         if System.is_unix():
-            return os.stat(path).st_ino
+            return os.lstat(path).st_ino
 
         # getdirinfo from ntfsutils works on both files and dirs
         info = System.getdirinfo(path)

dvc/utils.py

@@ -99,6 +99,11 @@ def move(src, dst):
     if not os.path.exists(dname):
         os.makedirs(dname)
 
+    if os.path.islink(src):
+        shutil.copy(os.readlink(src), dst)
+        os.unlink(src)
+        return
+
     shutil.move(src, dst)