ExternalVendorCode/tahoe-lafs
1
0
Fork 0
mirror of https://github.com/tahoe-lafs/tahoe-lafs.git synced 2024-12-29 17:28:53 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Describe use of size=None for deleted files. refs ticket:1710.

Browse Source 
Signed-off-by: Daira Hopwood <daira@jacaranda.org>
This commit is contained in:
Daira Hopwood 2015-10-25 13:19:13 +00:00
parent 85bcd89f3a
commit 5d2365f6c4
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
docs/proposed/magic-folder/remote-to-local-sync.rst
View File

@ -896,10 +896,20 @@ take this as a signal to rename their copies to the backup filename.
Note that the entry for this zero-length file has a version number as Note that the entry for this zero-length file has a version number as
usual, and later versions may restore the file. usual, and later versions may restore the file.
When the downloader deletes a file (or renames it to a filename
ending in ``.backup``) in response to a remote change, a local
filesystem notification will occur, and we must make sure that this
is not treated as a local change. To do this we have the downloader
set the ``size`` field in the magic folder db to ``None`` (SQL NULL)
just before deleting the file, and suppress notifications for which
the local file does not exist, and the recorded ``size`` field is
``None``.
When a Magic Folder client restarts, we can detect files that had When a Magic Folder client restarts, we can detect files that had
been downloaded but were deleted while it was not running, because been downloaded but were deleted while it was not running, because
their paths will have last-downloaded records in the magic folder db their paths will have last-downloaded records in the magic folder db
without any corresponding local file. with a ``size`` other than ``None``, and without any corresponding
local file.
Deletion of a directory Deletion of a directory
~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~