Mercurial > hg
view tests/test-casecollision.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 | 7a9cbb315d84 |
children | 0b8e076e878c |
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#require no-icasefs test file addition with colliding case $ hg init repo1 $ cd repo1 $ echo a > a $ echo A > A $ hg add a $ hg st A a ? A $ hg add --config ui.portablefilenames=abort A abort: possible case-folding collision for A [255] $ hg st A a ? A $ hg add A warning: possible case-folding collision for A $ hg st A A A a $ hg forget A $ hg st A a ? A $ hg add --config ui.portablefilenames=no A $ hg st A A A a $ mkdir b $ touch b/c b/D $ hg add b adding b/D adding b/c $ touch b/d b/C $ hg add b/C warning: possible case-folding collision for b/C $ hg add b/d warning: possible case-folding collision for b/d $ touch b/a1 b/a2 $ hg add b adding b/a1 adding b/a2 $ touch b/A2 b/a1.1 $ hg add b/a1.1 b/A2 warning: possible case-folding collision for b/A2 $ touch b/f b/F $ hg add b/f b/F warning: possible case-folding collision for b/f $ touch g G $ hg add g G warning: possible case-folding collision for g $ mkdir h H $ touch h/x H/x $ hg add h/x H/x warning: possible case-folding collision for h/x $ touch h/s H/s $ hg add h/s $ hg add H/s warning: possible case-folding collision for H/s case changing rename must not warn or abort $ echo c > c $ hg ci -qAmx $ hg mv c C $ cd ..