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view tests/test-revert-unknown.t @ 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 | 4c94b6d0fb1c |
children | 5c2a4f37eace |
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$ hg init $ touch unknown $ touch a $ hg add a $ hg ci -m "1" $ touch b $ hg add b $ hg ci -m "2" Should show unknown $ hg status ? unknown $ hg revert -r 0 --all removing b Should show unknown and b removed $ hg status R b ? unknown Should show a and unknown $ ls a unknown