hg: use vfs functions in destination repository with share

In this patch, dstwvfs is added to use vfs functions in working directory of
destination shared repository. Existing filesystem operations are updated
to use vfs functions through dstwvfs.

mercurial/hg.py

@@ -174,12 +174,13 b' def share(ui, source, dest=None, update='
 
     root = os.path.realpath(dest)
     roothg = os.path.join(root, '.hg')
+    destwvfs = scmutil.vfs(dest, realpath=True)
 
     if os.path.exists(roothg):
         raise util.Abort(_('destination already exists'))
 
-    if not os.path.isdir(root):
-        os.mkdir(root)
+    if not destwvfs.isdir():
+        destwvfs.mkdir()
     util.makedir(roothg, notindexed=True)
 
     requirements = ''
@@ -193,7 +194,7 b' def share(ui, source, dest=None, update='
     util.writefile(os.path.join(roothg, 'requires'), requirements)
     util.writefile(os.path.join(roothg, 'sharedpath'), sharedpath)
 
-    r = repository(ui, root)
+    r = repository(ui, destwvfs.base)
 
     default = srcrepo.ui.config('paths', 'default')
     if default: