[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2882: Magic-folder uploads/downloads do not preserve filesystem metadata

[Tahoe-LAFS]

#2882: Magic-folder uploads/downloads do not preserve filesystem metadata
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     Reporter:  cypher   |      Owner:
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:  undecided
    Component:  unknown  |    Version:  1.12.1
   Resolution:           |   Keywords:  magic-folder
Launchpad Bug:           |
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Description changed by cypher:

Old description:

> Unlike the `tahoe backup` command, magic-folder uploads/downloads do not
> preserve filesystem metadata (such as mtime/ctime, uid/gid, file
> attributes, etc.); when Bob's shared magic-folder downloads a file
> uploaded by Alice, that file's mtime/ctime will be set to the time at
> which the download completed rather than the (arguably more desirable)
> times at which that file was originally modified/created on Alice's
> computer.
>
> Preserving this metadata would be desirable not only for traditional
> archival purposes (since, e.g., the date that users may have taken
> certain pictures or written certain documents is often important) but
> also for the purposes of aiding users to resolve conflicts produced by
> magic-folder itself in a collaborative scenario (since, e.g., with the
> current implementation, Bob has no straightforward way of knowing whether
> the conflicting file produced on his computer by Alice was the one she
> edited last week or this morning).JJJ

New description:

 Unlike the `tahoe backup` command, magic-folder uploads/downloads do not
 preserve filesystem metadata (such as mtime/ctime, uid/gid, file
 attributes, etc.); when Bob's shared magic-folder downloads a file
 uploaded by Alice, that file's mtime/ctime will be set to the time at
 which the download completed rather than the (arguably more desirable)
 times at which that file was originally modified/created on Alice's
 computer.

 Preserving this metadata would be desirable not only for traditional
 archival purposes (since, e.g., the date that users may have taken certain
 pictures or written certain documents is often important) but also for the
 purposes of aiding users to resolve conflicts produced by magic-folder
 itself in a collaborative scenario (since, e.g., with the current
 implementation, Bob has no straightforward way of knowing whether the
 conflicting file produced on his computer by Alice was the one she edited
 last week or this morning).

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2882#comment:1>
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