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Identify and fix messages with FMD5 inconsistencies

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Introduce the '--migrate-fmd5-using-nametrans' option which migrates the
FMD5 hashes from versions prior to 6.3.5.

It seems that commit 'Apply nametrans to all Foldertypes' (6b2ec956cf)
introduced a regression because it changed the FMD5 part of the filename
calculated by OfflineIMAP. Thus, OfflineIMAP believes that the messages
has been removed and adds them back.

For more information, see:
http://www.offlineimap.org/configuration/2016/02/12/debian-upgrade-from-jessie-to-stretch.html

Bug-Debian: https://bugs.debian.org/812108
Reported-by: François <francois@avalenn.eu>
Signed-off-by: Ilias Tsitsimpis <i.tsitsimpis@gmail.com>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
This commit is contained in:
Ilias Tsitsimpis
2016-03-05 19:07:07 +02:00
committed by Nicolas Sebrecht
parent 334571038e
commit c84d23b656
3 changed files with 74 additions and 1 deletions
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14
docs/offlineimap.txt
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@ -163,6 +163,20 @@ blinkenlights, machineui.
This option is only applicable in non-verbose mode.
--migrate-fmd5-using-nametrans::
Migrate FMD5 hashes from versions prior to 6.3.5.
+
The way that FMD5 hashes are calculated was changed in version 6.3.5 (now using
the nametrans folder name) introducing a regression which may lead to
re-uploading all messages. Try and fix the above regression by calculating the
correct FMD5 values and renaming the corresponding messages.
CAUTION: Since the FMD5 part of the filename changes, this may lead to UID
conflicts. Ensure to dispose a proper backup of both the cache and the Maildir
before running this fix as well as verify the results using the `--dry-run'
flag first.
Synchronization Performance
---------------------------