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37 id 1PhfhL-0004zC-O1; Tue, 25 Jan 2011 11:00:27 +0100
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38 From: Michal Sojka <sojkam1@fel.cvut.cz>
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40 <mazieres-468jumwyp2ei6jwxn8m5vrkyja@temporary-address.scs.stanford.edu>,
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41 notmuch@notmuchmail.org
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42 Subject: Re: Tag timestamps and synchronization
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43 In-Reply-To: <x78vyanmnb.wl@ta.scs.stanford.edu>
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44 References: <x78vyanmnb.wl@ta.scs.stanford.edu>
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47 Date: Tue, 25 Jan 2011 11:00:27 +0100
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65 On Mon, 24 Jan 2011, dm-list-email-notmuch@scs.stanford.edu wrote:
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66 > One of the features I would like to see from notmuch is an easier
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67 > ability to synchronize tags across machines. At the very least, I
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68 > would need either incremental dump and restore, or some way to
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69 > communicate arbitrary tags to a local imap server that shares
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70 > notmuch's maildir (much as notmuch currently syncs the standard tags),
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71 > so that I synchronize two maildirs with a tool like offlineimap.
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75 > In the case of dovecot, the arbitrary tag format is very simple. Each
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76 > maildir has a file called dovecot-keywords mapping numbers 0, 1,
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77 > ... to keywords. Then mail file names contain lower-case letters for
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78 > the flags they are marked with--0 => a, 1 => b, etc.--allowing up to
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79 > 26 arbitrary tags for each maildir. One could probably sync to
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80 > dovecot's maildir format relatively easily in a script given
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81 > incremental dump and restore of tags. Or possibly notmuch could
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82 > natively support dovecot as one of multiple back-end tag storage
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87 here is my idea of solving the problem of synchronizing tags and all
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88 message metadata. The problem, it seems, is that every program uses a
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89 different format for message metadata. Maybe, it would be useful to
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90 define a simple metadata format that could be used by multiple programs
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91 (at least by notmuch, dovecot and maybe mutt) and base the
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92 synchronization on this format. Currently, I'm thinking about a separate
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93 file with the same base name as the message storing message metadata in
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94 the same format as message headers so it could look like:
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98 timestamp: 2011-01-25 10:48:00 GMT
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102 Then, any program could do whatever it wants with the metadata, e.g.
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103 index them in a database etc.
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105 In the ideal it would work like this: Dovecot would store the metadata
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106 in a file like described above. IMAP protocol would be extended to be
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107 able to send such metadata corresponding to a particular UID.
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108 offlineimap would be able to retrieve (and synchronize) the metadata
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109 files with the IMAP server and notmuch would index the metadata
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110 similarly as it index messages and would modify them when it change
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113 What do you (and others) think? Is this too wild? Too longterm?
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projects / notmuch-archives.git / blob