[tahoe-dev] [tahoe-lafs] #839: Copying directories containing caps from the future

tahoe-lafs trac at allmydata.org
Sun Nov 22 15:46:12 UTC 2009

#839: Copying directories containing caps from the future
 Reporter:  davidsarah             |           Owner:           
     Type:  defect                 |          Status:  new      
 Priority:  major                  |       Milestone:  undecided
Component:  code-frontend-cli      |         Version:  1.5.0    
 Keywords:  forward-compatibility  |   Launchpad_bug:           

Comment(by davidsarah):

 If we add a "copyByReference" flag, which controls whether a directory
 entry with an unknown cap format is copied just by copying its
 representation, then we can defer the decision as to which caps are copied
 in that way to when the new cap formats are designed.

 It would also be possible to add a field giving the lowest Tahoe version
 that fully supports that cap format. So when you operate on a directory
 with unknown caps, it would find the maximum unknown version, x.y.z, and
 print something like "Some entries in this directory are not supported by
 the current version of Tahoe. The creator of one or more of these entries
 claimed that Tahoe version x.y.z is needed."

Ticket URL: <http://allmydata.org/trac/tahoe/ticket/839#comment:2>
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