Mercurial > hg
annotate hgext/__init__.py @ 31209:dd2364f5180a
localrepo: handle rename with hardlinks properly
In "aftertrans", we rename "journal.*" to "undo.*". We expect "journal.*"
files to disappear after renaming.
However, if "journal.foo" and "undo.foo" refer to a same file (hardlink),
rename may be a no-op, leaving both files on disk, according to Linux
manpage [1]:
If oldpath and newpath are existing hard links referring to the same
file, then rename() does nothing, and returns a suc‐ cess status.
The POSIX specification [2] is not very clear about what to do.
To be safe, remove "undo.*" before the rename so "journal.*" cannot be left
on disk.
[1]: http://man7.org/linux/man-pages/man2/rename.2.html
[2]: http://pubs.opengroup.org/onlinepubs/9699919799/
author | Jun Wu <quark@fb.com> |
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date | Thu, 02 Mar 2017 21:49:30 -0800 |
parents | 155e3308289c |
children | 2372284d9457 |
rev | line source |
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28450
155e3308289c
hgext: officially turn 'hgext' into a namespace package
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
1360
diff
changeset
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1 from __future__ import absolute_import |
155e3308289c
hgext: officially turn 'hgext' into a namespace package
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
1360
diff
changeset
|
2 import pkgutil |
155e3308289c
hgext: officially turn 'hgext' into a namespace package
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
1360
diff
changeset
|
3 __path__ = pkgutil.extend_path(__path__, __name__) |