view tests/svn-safe-append.py @ 45612:094a91a183f1

changing-files: record merged files at commit time

The data is easy to gather at commit time, and we need it for changeset centric
copy tracing. Right now, it is not persisted so we cannot use it. However we
will fix this part very soon, gathering something to persist was necessary
first.

Differential Revision: https://phab.mercurial-scm.org/D9088

#!/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

if sys.version_info[0] >= 3:
    text = os.fsencode(sys.argv[1])
    fname = os.fsencode(sys.argv[2])
else:
    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(b"\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]