util_win32: make os_link more robust (issue 761)
On mapped drives, os_link() manages to create links but nlink() does not report them.
--- a/mercurial/util_win32.py Sat Jan 12 19:35:11 2008 +0100
+++ b/mercurial/util_win32.py Fri Jan 18 23:56:51 2008 +0100
@@ -146,9 +146,18 @@
self.win_strerror)
def os_link(src, dst):
- # NB will only succeed on NTFS
try:
win32file.CreateHardLink(dst, src)
+ # CreateHardLink sometimes succeeds on mapped drives but
+ # following nlinks() returns 1. Check it now and bail out.
+ if nlinks(src) < 2:
+ try:
+ win32file.DeleteFile(dst)
+ except:
+ pass
+ # Fake hardlinking error
+ raise WinOSError((18, 'CreateHardLink', 'The system cannot '
+ 'move the file to a different disk drive'))
except pywintypes.error, details:
raise WinOSError(details)