Mercurial > hg
view tests/blackbox-readonly-dispatch.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 | 0767c2f624c6 |
children | 853bf7d90804 |
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from __future__ import absolute_import, print_function import os from mercurial import ( dispatch, ) def testdispatch(cmd): """Simple wrapper around dispatch.dispatch() Prints command and result value, but does not handle quoting. """ print("running: %s" % (cmd,)) req = dispatch.request(cmd.split()) result = dispatch.dispatch(req) print("result: %r" % (result,)) # create file 'foo', add and commit f = open('foo', 'wb') f.write('foo\n') f.close() testdispatch("add foo") testdispatch("commit -m commit1 -d 2000-01-01 foo") # append to file 'foo' and commit f = open('foo', 'ab') f.write('bar\n') f.close() # remove blackbox.log directory (proxy for readonly log file) os.rmdir(".hg/blackbox.log") # replace it with the real blackbox.log file os.rename(".hg/blackbox.log-", ".hg/blackbox.log") testdispatch("commit -m commit2 -d 2000-01-02 foo") # check 88803a69b24 (fancyopts modified command table) testdispatch("log -r 0") testdispatch("log -r tip")