view tests/svn-safe-append.py @ 39473:b6db2e80a9ce

ancestors: actually iterate over ancestors in topological order (issue5979) This code previously used a dequeue logic, the first ancestors seen were the first ancestors to be emitted. In branching/merging situations, it can result in ancestors being yielded before their descendants, breaking the object contract. We got affected by this issue while working on the copy tracing code. At about the same time, Axel Hecht <axel@mozilla.com> reported the issue and provided the test case used in this changeset. Thanks Axel. Running `hg perfancestors` does not show a significant difference between the old and the new version.
author Boris Feld <boris.feld@octobus.net>
date Thu, 06 Sep 2018 17:00:28 -0400
parents ffa3026d4196
children e1e10cbb5568
line wrap: on
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#!/usr/bin/env python

from __future__ import absolute_import

__doc__ = """Same as `echo a >> b`, but ensures a changed mtime of b.
Without this svn will not detect workspace changes."""

import os
import stat
import sys

text = sys.argv[1]
fname = sys.argv[2]

f = open(fname, "ab")
try:
    before = os.fstat(f.fileno())[stat.ST_MTIME]
    f.write(text)
    f.write("\n")
finally:
    f.close()
inc = 1
now = os.stat(fname)[stat.ST_MTIME]
while now == before:
    t = now + inc
    inc += 1
    os.utime(fname, (t, t))
    now = os.stat(fname)[stat.ST_MTIME]