ancestor: use absolute_import
A few months ago, import-checker.py was taught to enforce a more
well-defined import style for files with absolute_import. However,
we stopped short of actually converting source files to use
absolute_import because of problems with certain files.
Investigation revealed the following problems with switching to
absolute_import universally:
1) import cycles result in import failure on Python 2.6
2) undetermined way to import C/pure modules
While these problems need to be solved, they can be put off.
This patch starts a series of converting files to absolute_import
that won't exhibit any of the aforementioned problems.
--- a/mercurial/ancestor.py Wed Aug 05 14:21:46 2015 -0400
+++ b/mercurial/ancestor.py Fri Aug 07 19:45:48 2015 -0700
@@ -5,9 +5,12 @@
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
+from __future__ import absolute_import
+
import collections
import heapq
-from node import nullrev
+
+from .node import nullrev
def commonancestorsheads(pfunc, *nodes):
"""Returns a set with the heads of all common ancestors of all nodes,