Mercurial > hg
view tests/test-wireproto.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 | 86db5cb55d46 |
children | b47fe9733d76 |
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from __future__ import absolute_import, print_function from mercurial import ( util, wireproto, ) stringio = util.stringio class proto(object): def __init__(self, args): self.args = args def getargs(self, spec): args = self.args args.setdefault('*', {}) names = spec.split() return [args[n] for n in names] class clientpeer(wireproto.wirepeer): def __init__(self, serverrepo): self.serverrepo = serverrepo def _capabilities(self): return ['batch'] def _call(self, cmd, **args): return wireproto.dispatch(self.serverrepo, proto(args), cmd) def _callstream(self, cmd, **args): return stringio(self._call(cmd, **args)) @wireproto.batchable def greet(self, name): f = wireproto.future() yield {'name': mangle(name)}, f yield unmangle(f.value) class serverrepo(object): def greet(self, name): return "Hello, " + name def filtered(self, name): return self def mangle(s): return ''.join(chr(ord(c) + 1) for c in s) def unmangle(s): return ''.join(chr(ord(c) - 1) for c in s) def greet(repo, proto, name): return mangle(repo.greet(unmangle(name))) wireproto.commands['greet'] = (greet, 'name',) srv = serverrepo() clt = clientpeer(srv) print(clt.greet("Foobar")) b = clt.batch() fs = [b.greet(s) for s in ["Fo, =;:<o", "Bar"]] b.submit() print([f.value for f in fs])