Returns the current clock value for a watched root.

Since 3.9.

The capability name associated with this enhanced functionality is clock-sync-timeout.

sync_timeout specifies the number of milliseconds that you want to wait to observe a synchronization cookie. The synchronization cookie is created at the start of your clock call and, once the cookie is observed, means that the clock value returned by this command is at least as current as the time of your clock call.

If no sync_timeout is specified, the returned clock value is the instantaneous value of the clock associated with the watched root, and may be almost immediately invalidated if there are any filesystem notifications that are yet to be processed.

$ watchman clock /path/to/dir


Note the third options argument is optional.

["clock", "/path/to/dir", {"sync_timeout": 100}]