[PATCH 1 of 9 V3] localrepo: add _encodetags method

[Sean Farley]

# HG changeset patch
# User Sean Farley <sean.michael.farley at gmail.com>
# Date 1396036685 18000
#      Fri Mar 28 14:58:05 2014 -0500
# Node ID 9bab4721b0f6821f1f03d8a3eb9780dd14171000
# Parent  dfad9bb23ab49bd461544c1d5fab3318ab637d23
localrepo: add _encodetags method

This will be used in upcoming patches to help reduce code duplication.

diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -579,10 +579,24 @@ class localrepository(object):
                 t[k] = v
             except (error.LookupError, ValueError):
                 pass
         return t
 
+    def _encodetags(self, tags, tagtypes):
+        '''Build the return dicts for tags and tagtypes.  Have to
+        re-encode tag names because the tags module always uses UTF-8
+        (in order not to lose info writing to the cache), but the rest
+        of Mercurial wants them in local encoding.'''
+        oldtags = tags
+        tags = {}
+        for (name, (node, hist)) in oldtags.iteritems():
+            if node != nullid:
+                tags[encoding.tolocal(name)] = node
+        tagtypes = dict([(encoding.tolocal(name), value)
+                         for (name, value) in tagtypes.iteritems()])
+        return (tags, tagtypes)
+
     def _findtags(self):
         '''Do the hard work of finding tags.  Return a pair of dicts
         (tags, tagtypes) where tags maps tag name to node, and tagtypes
         maps tag name to a string like \'global\' or \'local\'.
         Subclasses or extensions are free to add their own tags, but