[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2569: Magic-Folder: add status command-line tool

[Tahoe-LAFS]

#2569: Magic-Folder: add status command-line tool
--------------------------------------------+------------------------------
     Reporter:  dawuud                      |      Owner:  daira
         Type:  enhancement                 |     Status:  new
     Priority:  normal                      |  Milestone:  undecided
    Component:  code-frontend-magic-folder  |    Version:  1.10.1
   Resolution:                              |   Keywords:  status magic-
Launchpad Bug:                              |  folder
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Comment (by daira):

 `deque` has a `maxlen` parameter to
 [https://docs.python.org/2/library/collections.html#collections.deque its
 constructor]:

 > If `maxlen` is not specified or is `None`, deques may grow to an
 arbitrary length. Otherwise, the deque is bounded to the specified maximum
 length. Once a bounded length deque is full, when new items are added, a
 corresponding number of items are discarded from the opposite end. Bounded
 length deques provide functionality similar to the tail filter in Unix.
 They are also useful for tracking transactions and other pools of data
 where only the most recent activity is of interest.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2569#comment:12>
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