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f{,data}sync() usage could be optimized by batching the calls.
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automatically resume upon transient errors, e.g. "connection reset by peer"
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or timeout after some data was already transmitted.
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possibly also try to handle Exchange's "glitches" somehow.
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uidvalidity lock timeout handling would be a good idea.
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should complain when multiple Channels match the same folders.
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should complain about nonsensical combinations like Sync Pull + Create Both.
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propagate folder deletions even when the folders are non-empty.
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- verify that "most" of the folders in the Channel are still there.
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- refuse to delete unpropagated messages when trashing on the remote side.
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deprecate master/slave terminology
the underlying metaphor refers to an inhumane practice, so using it
casually is rightfully offensive to many people. it isn't even a
particularly apt metaphor, as it suggests a strict hierarchy that is
counter to mbsync's highly symmetrical mode of operation.
the far/near terminology has been chosen as the replacement, as it is a
natural fit for the push/pull terminology. on the downside, due to these
not being nouns, a few uses are a bit awkward, and several others had to
be amended to include 'side'. also, it's conceptually quite close to
remote/local, which matches the typical use case, but is maybe a bit too
suggestive of actually non-existing limitations.
the new f/n suffixes of the -C/-R/-X options clash with pre-existing
options, so direct concatenation of short options is even less practical
than before (some suffixes of -D already clashed), but doing that leads
to unreadable command lines anyway.
as with previous deprecations, all pre-existing command line and config
options keep working, but yield a warning. the state files are silently
upgraded.
4 years ago
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- refuse to delete far side if it has unpropagated messages. symmetry?
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add option to suppress complaints about folders that would need creation
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(but not deleted ones).
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add message expiration based on arrival date (message date would be too
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unreliable). MaxAge; probably mutually exclusive to MaxMessages.
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add alternative treatments of expired messages. ExpiredMessageMode: Prune
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(delete messages like now), Keep (just don't sync) and Archive (move to
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separate folder - ArchiveSuffix, default .archive).
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add support for event notification callbacks.
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deprecate master/slave terminology
the underlying metaphor refers to an inhumane practice, so using it
casually is rightfully offensive to many people. it isn't even a
particularly apt metaphor, as it suggests a strict hierarchy that is
counter to mbsync's highly symmetrical mode of operation.
the far/near terminology has been chosen as the replacement, as it is a
natural fit for the push/pull terminology. on the downside, due to these
not being nouns, a few uses are a bit awkward, and several others had to
be amended to include 'side'. also, it's conceptually quite close to
remote/local, which matches the typical use case, but is maybe a bit too
suggestive of actually non-existing limitations.
the new f/n suffixes of the -C/-R/-X options clash with pre-existing
options, so direct concatenation of short options is even less practical
than before (some suffixes of -D already clashed), but doing that leads
to unreadable command lines anyway.
as with previous deprecations, all pre-existing command line and config
options keep working, but yield a warning. the state files are silently
upgraded.
4 years ago
|
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|
make it possible to have different mailbox names for far and near side in
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Patterns.
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deprecate master/slave terminology
the underlying metaphor refers to an inhumane practice, so using it
casually is rightfully offensive to many people. it isn't even a
particularly apt metaphor, as it suggests a strict hierarchy that is
counter to mbsync's highly symmetrical mode of operation.
the far/near terminology has been chosen as the replacement, as it is a
natural fit for the push/pull terminology. on the downside, due to these
not being nouns, a few uses are a bit awkward, and several others had to
be amended to include 'side'. also, it's conceptually quite close to
remote/local, which matches the typical use case, but is maybe a bit too
suggestive of actually non-existing limitations.
the new f/n suffixes of the -C/-R/-X options clash with pre-existing
options, so direct concatenation of short options is even less practical
than before (some suffixes of -D already clashed), but doing that leads
to unreadable command lines anyway.
as with previous deprecations, all pre-existing command line and config
options keep working, but yield a warning. the state files are silently
upgraded.
4 years ago
|
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- use far:near for the pattern
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- supporting names with colons requires and extension of the parser to
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report which parts of an argument were quoted
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- this makes Groups mostly useless, as they are mostly a workaround for this
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function being missing so far
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- this is needed for move detection, which would work only within one Channel
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- this supersedes MapInbox
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add regexp-based mailbox path rewriting to the drivers. user would provide
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expressions for both directions. every transformation would be immediately
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verified with the inverse transform. PathDelimiter and Flatten would become
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special cases of this.
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add daemon mode. primary goal: keep imap password in memory.
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also: idling mode.
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parallel fetching of multiple mailboxes.
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TLS session resumption becomes interesting then as well.
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imap_set_msg_flags() & imap_trash_msg(): group commands for efficiency.
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add streaming from fetching to storing.
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this is complicated by the IMAP target needing the final size in advance,
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which we can't know in a single pass when newline translation is necessary.
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handle custom flags (keywords).
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this is impeded by there being no Maildir-side standard.
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make use of IMAP CONDSTORE extension (rfc4551; CHANGEDSINCE FETCH Modifier);
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make use of IMAP QRESYNC extension (rfc5162) to avoid SEARCH to find vanished
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messages.
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make use of IMAP CAPABILITY APPENDLIMIT= extension (rfc7889; fastmail & gmail).
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this is really useful only for IMAP <=> IMAP syncs: saves FETCH BODY.
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the message could still become oversized due to conversion.
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dummy messages resulting from MaxSize should contain a dump of the original
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message's MIME structure and its (reasonably sized) text parts.
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don't SELECT boxes unless really needed; in particular not for appending,
|
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and in write-only mode not before changes are made.
|
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problem: UIDVALIDITY change detection is delayed, significantly complicating
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matters.
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some error messages are unhelpful in non-verbose mode due to missing context.
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possibly use ^[[1m to highlight error messages.
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consider alternative approach to trashing: instead of the current trash-before-
|
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expunge done by mbsync, let MUAs do the trashing (as modern ones typically do).
|
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mbsync wouldn't do any trashing by itself, but should track the moves for
|
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optimization. additionally, there should be a mode to move trashed messages to
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the remote store. TrashMode Internal|External, AbsorbRemoteTrash.
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a yet different approach to trashing is treating the trash like a normal mailbox.
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however, this implies a huge working set.
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consider optional use of messages-id (and X-GM-MSGID):
|
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- detection of message moves between folders
|
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- recovery from loss of sync state, migration from other tools
|
