localrepo: use path expansion API via vfs

As a part of migration to vfs, this patch moves path expansion API
invocations in the constructor of "localrepository" to the constructor
of "opener", because the root path to the repository is very important
to handle paths using non-ASCII characters correctly.

This patch also rearrange initialization order of "wvfs" field,
because it is required to initialize "self.root".

mercurial/localrepo.py

@@ -37,14 +37,14 b' class localrepository(repo.repository):'
 
     def __init__(self, baseui, path=None, create=False):
         repo.repository.__init__(self)
-        self.root = os.path.realpath(util.expandpath(path))
+        self.wopener = scmutil.opener(path, expand=True)
+        self.wvfs = self.wopener
+        self.root = self.wvfs.base
         self.path = os.path.join(self.root, ".hg")
         self.origroot = path
         self.auditor = scmutil.pathauditor(self.root, self._checknested)
         self.opener = scmutil.opener(self.path)
         self.vfs = self.opener
-        self.wopener = scmutil.opener(self.root)
-        self.wvfs = self.wopener
         self.baseui = baseui
         self.ui = baseui.copy()
         # A list of callback to shape the phase if no data were found.

mercurial/scmutil.py

@@ -196,7 +196,9 b' class opener(abstractopener):'
     This class is used to hide the details of COW semantics and
     remote file access from higher level code.
     '''
-    def __init__(self, base, audit=True):
+    def __init__(self, base, audit=True, expand=False):
+        if expand:
+            base = os.path.realpath(util.expandpath(base))
         self.base = base
         self._audit = audit
         if audit: