Mercurial > hg
view tests/failfilemerge.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> |
---|---|
date | Thu, 02 Mar 2017 21:49:30 -0800 |
parents | 318a24b52eeb |
children | c0ce60459d84 |
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# extension to emulate interrupting filemerge._filemerge from __future__ import absolute_import from mercurial import ( error, extensions, filemerge, ) def failfilemerge(filemergefn, premerge, repo, mynode, orig, fcd, fco, fca, labels=None): raise error.Abort("^C") return filemergefn(premerge, repo, mynode, orig, fcd, fco, fca, labels) def extsetup(ui): extensions.wrapfunction(filemerge, '_filemerge', failfilemerge)