Mercurial > public > mercurial-scm > hg-stable
comparison mercurial/util.py @ 917:7f3f55903496
Fix hg clone race with writer
Most read operations in hg don't need locks because we order reads and
writes for consistency. Clone is an exception to this as we're copying
entire file histories and could end up with more file history copied
than we have commits.
For now, make clone take a lock on the source repo. Non-hardlinked
clone should eventually be changed to use lockless pull.
| author | mpm@selenic.com |
|---|---|
| date | Tue, 16 Aug 2005 14:53:47 -0800 |
| parents | 302f83b85054 |
| children | 22571b8d35d3 |
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| 916:fe094cca9915 | 917:7f3f55903496 |
|---|---|
| 185 if os.path.isdir(srcname): | 185 if os.path.isdir(srcname): |
| 186 copytree(srcname, dstname, copyfile) | 186 copytree(srcname, dstname, copyfile) |
| 187 elif os.path.isfile(srcname): | 187 elif os.path.isfile(srcname): |
| 188 copyfile(srcname, dstname) | 188 copyfile(srcname, dstname) |
| 189 else: | 189 else: |
| 190 raise IOError("Not a regular file: %r" % srcname) | 190 pass |
| 191 | 191 |
| 192 def _makelock_file(info, pathname): | 192 def _makelock_file(info, pathname): |
| 193 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) | 193 ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL) |
| 194 os.write(ld, info) | 194 os.write(ld, info) |
| 195 os.close(ld) | 195 os.close(ld) |