Mercurial > hg
view tests/test-merge2.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 | f2719b387380 |
children | 1850066f9e36 |
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$ hg init t $ cd t $ echo This is file a1 > a $ hg add a $ hg commit -m "commit #0" $ echo This is file b1 > b $ hg add b $ hg commit -m "commit #1" $ rm b $ hg update 0 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo This is file b2 > b $ hg add b $ hg commit -m "commit #2" created new head $ cd ..; rm -r t $ mkdir t $ cd t $ hg init $ echo This is file a1 > a $ hg add a $ hg commit -m "commit #0" $ echo This is file b1 > b $ hg add b $ hg commit -m "commit #1" $ rm b $ hg update 0 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo This is file b2 > b $ hg commit -A -m "commit #2" adding b created new head $ cd ..; rm -r t $ hg init t $ cd t $ echo This is file a1 > a $ hg add a $ hg commit -m "commit #0" $ echo This is file b1 > b $ hg add b $ hg commit -m "commit #1" $ rm b $ hg remove b $ hg update 0 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo This is file b2 > b $ hg commit -A -m "commit #2" adding b created new head $ cd ..