# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 1434333857 14400
# Node ID 183965a00c76d967597f209e4b9e387be9e8031c
# Parent  273d94255e1eb9b5cbe1b001704117d006465269
context: override workingctx.hex() to avoid a crash

Since node is None for workingctx, it can't use the base class
implementation of 'hex(self.node())'.

It doesn't appear that there are any current callers of this, but there will be
when archive supports 'wdir()'.  My first thought was to use "{p1node}+", but
that would cause headaches elsewhere [1].

We should probably fix up localrepository.__getitem__ to accept this hash for
consistency, as a followup.  This works, if the full hash is specified:

  @@ -480,7 +480,7 @@
           return dirstate.dirstate(self.vfs, self.ui, self.root, validate)

       def __getitem__(self, changeid):
  -        if changeid is None:
  +        if changeid is None or changeid == 'ff' * 20:
               return context.workingctx(self)
           if isinstance(changeid, slice):
               return [context.changectx(self, i)

That differs from null, where it will accept any number of 0s, as long as it
isn't ambiguous.


[1] https://www.selenic.com/pipermail/mercurial-devel/2015-June/071166.html

diff -r 273d94255e1e -r 183965a00c76 mercurial/context.py
--- a/mercurial/context.py	Mon Jun 15 16:50:31 2015 -0400
+++ b/mercurial/context.py	Sun Jun 14 22:04:17 2015 -0400
@@ -1334,6 +1334,9 @@
     def __contains__(self, key):
         return self._repo.dirstate[key] not in "?r"
 
+    def hex(self):
+        return "ff" * 20
+
     @propertycache
     def _parents(self):
         p = self._repo.dirstate.parents()