[tahoe-lafs-trac-stream] [Tahoe-LAFS] #1710: Magic Folder: implement local deletion of files/directories as described in "Water Dragons" section of design doc

[Tahoe-LAFS]

#1710: Magic Folder: implement local deletion of files/directories as described in
"Water Dragons" section of design doc
-------------------------------------+-------------------------------------
     Reporter:  davidsarah           |      Owner:  dawuud
         Type:  enhancement          |     Status:  new
     Priority:  normal               |  Milestone:  1.11.0
    Component:  code-frontend-       |    Version:  1.9.1
  magic-folder                       |   Keywords:  unlink space-efficiency
   Resolution:                       |  gc otf-magic-folder-objective4
Launchpad Bug:                       |
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Comment (by daira):

 Yes, I believe that's correct (that it is not implemented). As well as
 scanning for existing files/directories at startup, we should simulate
 change events for paths in the magic folder db at which no file/directory
 exists.

 We can do that by obtaining the set of all entries in the `local_files`
 table before doing the scan, removing paths from that set as we process
 them, and then processing all those remaining in the set.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1710#comment:26>
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