# HG changeset patch
# User Gregory Szorc <gregory.szorc@gmail.com>
# Date 2018-09-17 22:52:59
# Node ID da9ce63bfa9bd83b3e97f913b026cadb66643990
# Parent  3e8952c0cb4552046434e9977babfadfe4458902

transaction: make undoname a private attribute

This attribute tracks the file pattern to use for undo files.
It is an implementation detail of the current transaction semantics
and doesn't need to be part of the future transaction interface. So
mark it as private.

Differential Revision: https://phab.mercurial-scm.org/D4623

diff --git a/mercurial/transaction.py b/mercurial/transaction.py
--- a/mercurial/transaction.py
+++ b/mercurial/transaction.py
@@ -132,7 +132,7 @@ class transaction(util.transactional):
         self.entries = []
         self.map = {}
         self.journal = journalname
-        self.undoname = undoname
+        self._undoname = undoname
         self._queue = []
         # A callback to validate transaction content before closing it.
         # should raise exception is anything is wrong.
@@ -532,9 +532,10 @@ class transaction(util.transactional):
 
     def _writeundo(self):
         """write transaction data for possible future undo call"""
-        if self.undoname is None:
+        if self._undoname is None:
             return
-        undobackupfile = self.opener.open("%s.backupfiles" % self.undoname, 'w')
+        undobackupfile = self.opener.open("%s.backupfiles" % self._undoname,
+                                          'w')
         undobackupfile.write('%d\n' % version)
         for l, f, b, c in self._backupentries:
             if not f:  # temporary file
@@ -549,7 +550,7 @@ class transaction(util.transactional):
                 vfs = self._vfsmap[l]
                 base, name = vfs.split(b)
                 assert name.startswith(self.journal), name
-                uname = name.replace(self.journal, self.undoname, 1)
+                uname = name.replace(self.journal, self._undoname, 1)
                 u = vfs.reljoin(base, uname)
                 util.copyfile(vfs.join(b), vfs.join(u), hardlink=True)
             undobackupfile.write("%s\0%s\0%s\0%d\n" % (l, f, u, c))