syncdaemon allows creation of folder using symlinks

* I create a folder named:

the-real-music-folder/

* then, I created a symlink pointing to it:

lrwxrwxrwx 1 nessita nessita 22 2010-03-31 17:02 TheSuperMusicUDF -> the-real-music-folder/

* then, I used u1sdtool to make TheSuperMusicUDF an UDF:

nessita@dali:~$ u1sdtool --create-folder=/home/nessita/TheSuperMusicUDF

this call blocked and never returned until killed. SD log shown:

# IDLE state

2010-03-31 17:02:30,527 - ubuntuone.SyncDaemon.Main - NOTE - ---- MARK (state: <State: 'QUEUE_MANAGER' (queues IDLE connection 'With User With Network')>; queues: metadata: 0; content: 0; hash: 0, fsm-cache: hit=11581 miss=1262) ----

# create folder was called

2010-03-31 17:02:36,936 - ubuntuone.SyncDaemon.DBus - DEBUG - Folders.create: dbus.String(u'/home/nessita/TheSuperMusicUDF')
2010-03-31 17:02:36,936 - ubuntuone.SyncDaemon.VM - DEBUG - create udf: '/home/nessita/TheSuperMusicUDF'
2010-03-31 17:02:36,938 - ubuntuone.SyncDaemon.ActionQueue - DEBUG - CreateUDF share:--- node:marker:/home/nessita/TheSuperMusicUDF CreateUDF() queueing in the %s META_QUEUE
2010-03-31 17:02:36,938 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: SYS_META_QUEUE_WAITING, args:(), kw:{}
2010-03-31 17:02:36,938 - ubuntuone.SyncDaemon.StateManager - DEBUG - received event 'SYS_META_QUEUE_WAITING'
2010-03-31 17:02:36,939 - ubuntuone.SyncDaemon.StateManager - DEBUG - sending event to QueueManager
2010-03-31 17:02:36,939 - ubuntuone.SyncDaemon.QueueManager - DEBUG - Changing state IDLE -> WORKING_ON_METADATA
2010-03-31 17:02:36,939 - ubuntuone.SyncDaemon.QueueManager - DEBUG - In WORKING_ON_METADATA: running META_QUEUE
2010-03-31 17:02:36,939 - ubuntuone.SyncDaemon.ActionQueue - DEBUG - CreateUDF share:--- node:marker:/home/nessita/TheSuperMusicUDF CreateUDF() starting
2010-03-31 17:02:36,940 - ubuntuone.SyncDaemon.ActionQueue - DEBUG - CreateUDF share:--- node:marker:/home/nessita/TheSuperMusicUDF CreateUDF() running
2010-03-31 17:02:36,942 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: SYS_STATE_CHANGED, args:(), kw:{'state': QUEUE_MANAGER (error=False connected=True online=True) Queue: WORKING_ON_METADATA Connection: With User With Network}
2010-03-31 17:02:45,490 - ubuntuone.SyncDaemon.ActionQueue - DEBUG - CreateUDF share:--- node:marker:/home/nessita/TheSuperMusicUDF CreateUDF() success

# the UDF was correctly created on the server!

2010-03-31 17:02:45,490 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: AQ_CREATE_UDF_OK, args:(), kw:{'marker': marker:/home/nessita/TheSuperMusicUDF, 'node_id': '124222f1-d5e8-41c3-9f5e-a675a6d47dd9', 'volume_id': '34e90876-d94b-43ef-8003-e5adcb5a9091'}
2010-03-31 17:02:45,491 - ubuntuone.SyncDaemon.VM - DEBUG - add_udf: <UDF id '34e90876-d94b-43ef-8003-e5adcb5a9091', real path '/home/nessita/TheSuperMusicUDF'>
2010-03-31 17:02:45,491 - ubuntuone.SyncDaemon.VM - DEBUG - udf not in metadata, adding it!
2010-03-31 17:02:45,515 - ubuntuone.SyncDaemon.fsm - DEBUG - create: path='/home/nessita/TheSuperMusicUDF' mdid='b997945f-ef44-476b-9fb8-d497f74d53e7' share_id='34e90876-d94b-43ef-8003-e5adcb5a9091' node_id=None is_dir=True
2010-03-31 17:02:45,528 - ubuntuone.SyncDaemon.fsm - DEBUG - set_node_id: path='/home/nessita/TheSuperMusicUDF' mdid='b997945f-ef44-476b-9fb8-d497f74d53e7' share_id='34e90876-d94b-43ef-8003-e5adcb5a9091' node_id='124222f1-d5e8-41c3-9f5e-a675a6d47dd9'

# BOOM!

2010-03-31 17:02:45,529 - ubuntuone.SyncDaemon.local_rescan - INFO - scan dir: '/home/nessita/TheSuperMusicUDF' mdid: b997945f-ef44-476b-9fb8-d497f74d53e7
2010-03-31 17:02:45,532 - ubuntuone.SyncDaemon.local_rescan - ERROR - The path is in disk but it's not a dir: '/home/nessita/TheSuperMusicUDF'
2010-03-31 17:02:45,532 - ubuntuone.SyncDaemon.EQ - ERROR - Error encountered while handling: AQ_CREATE_UDF_OK in <ubuntuone.syncdaemon.volume_manager.VolumeManager object at 0x327ac90>
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/event_queue.py", line 790, in _dispatch
    method(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/volume_manager.py", line 989, in handle_AQ_CREATE_UDF_OK
    self.add_udf(udf)
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/volume_manager.py", line 781, in add_udf
    d = self._scan_udf(udf)
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/volume_manager.py", line 959, in _scan_udf
    d = self.m.lr.scan_dir(mdobj.mdid, udf.path, udfmode=True)
  File "/usr/lib/python2.6/dist-packages/ubuntuone/syncdaemon/local_rescan.py", line 132, in scan_dir
    raise ValueError(m)
ValueError: The path is in disk but it's not a dir: '/home/nessita/TheSuperMusicUDF'

# nothing else happens

2010-03-31 17:02:45,564 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: SYS_META_QUEUE_DONE, args:(), kw:{}
2010-03-31 17:02:45,565 - ubuntuone.SyncDaemon.StateManager - DEBUG - received event 'SYS_META_QUEUE_DONE'
2010-03-31 17:02:45,565 - ubuntuone.SyncDaemon.StateManager - DEBUG - sending event to QueueManager
2010-03-31 17:02:45,565 - ubuntuone.SyncDaemon.QueueManager - DEBUG - Changing state WORKING_ON_METADATA -> IDLE
2010-03-31 17:02:45,565 - ubuntuone.SyncDaemon.EQ - DEBUG - push_event: SYS_STATE_CHANGED, args:(), kw:{'state': QUEUE_MANAGER (error=False connected=True online=True) Queue: IDLE Connection: With User With Network}
2010-03-31 17:04:30,527 - ubuntuone.SyncDaemon.Main - NOTE - ---- MARK (state: <State: 'QUEUE_MANAGER' (queues IDLE connection 'With User With Network')>; queues: metadata: 0; content: 0; hash: 0, fsm-cache: hit=11582 miss=1263) ----