fsmonitor: use vfs instead of opener (issue5938)...
fsmonitor: use vfs instead of opener (issue5938)
"opener" of localrepository object was dropped at Mercurial 4.3 (or
a7e210167c28). "vfs" should be used instead.
wlock is required to write into a file under .hg directory.
For efficiency, we should change _cmpsets() from:
1. acquire wlock
2. open log file under .hg directory with write mode
3. compare between result of watchman and Mercurial's dirstate logic
4. write out error info into a file, if error is detected
5. release wlock
to:
1. compare between result of watchman and Mercurial's dirstate logic
2. acquire wlock, if error is detected
3. open and write error info into a file
4. release wlock
But this is another issue.
