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view tests/test-debugindexdot.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 | a03c3ba3e4b5 |
children | 435481393198 |
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Just exercise debugindexdot Create a short file history including a merge. $ hg init t $ cd t $ echo a > a $ hg ci -qAm t1 -d '0 0' $ echo a >> a $ hg ci -m t2 -d '1 0' $ hg up -qC 0 $ echo b >> a $ hg ci -m t3 -d '2 0' created new head $ HGMERGE=true hg merge -q $ hg ci -m merge -d '3 0' $ hg debugindexdot .hg/store/data/a.i digraph G { -1 -> 0 0 -> 1 0 -> 2 2 -> 3 1 -> 3 } $ cd ..