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More or less arbitrarily, notmuch-dump.1 gets the more detailed description of the format.
95 lines
2.5 KiB
Groff
95 lines
2.5 KiB
Groff
.TH NOTMUCH-DUMP 1 2012-08-20 "Notmuch 0.14"
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.SH NAME
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notmuch-dump \- creates a plain-text dump of the tags of each message
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.SH SYNOPSIS
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.B "notmuch dump"
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.RB [ "\-\-format=(sup|batch-tag)" "] [--]"
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.RI "[ --output=<" filename "> ] [--]"
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.RI "[ <" search-term ">...]"
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.SH DESCRIPTION
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Dump tags for messages matching the given search terms.
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Output is to the given filename, if any, or to stdout.
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These tags are the only data in the notmuch database that can't be
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recreated from the messages themselves. The output of notmuch dump is
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therefore the only critical thing to backup (and much more friendly to
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incremental backup than the native database files.)
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.TP 4
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.B \-\-format=(sup|batch-tag)
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Notmuch restore supports two plain text dump formats, both with one message-id
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per line, followed by a list of tags.
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.RS 4
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.TP 4
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.B sup
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The
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.B sup
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dump file format is specifically chosen to be
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compatible with the format of files produced by sup-dump.
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So if you've previously been using sup for mail, then the
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.B "notmuch restore"
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command provides you a way to import all of your tags (or labels as
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sup calls them).
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Each line has the following form
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.RS 4
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.RI < message-id >
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.B (
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.RI < tag "> ..."
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.B )
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with zero or more tags are separated by spaces. Note that (malformed)
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message-ids may contain arbitrary non-null characters. Note also
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that tags with spaces will not be correctly restored with this format.
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.RE
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.RE
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.RS 4
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.TP 4
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.B batch-tag
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The
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.B batch-tag
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dump format is intended to more robust against malformed message-ids
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and tags containing whitespace or non-\fBascii\fR(7) characters.
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Each line has the form
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.RS 4
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.RI "+<" "encoded-tag" "> " "" "+<" "encoded-tag" "> ... -- " "" " id:<" encoded-message-id >
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where encoded means that every byte not matching the regex
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.B [A-Za-z0-9@=.,_+-]
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is replace by
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.B %nn
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where nn is the two digit hex encoding.
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The astute reader will notice this is a special case of the batch input
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format for \fBnotmuch-tag\fR(1); note that the single message-id query is
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mandatory for \fBnotmuch-restore\fR(1).
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.RE
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With no search terms, a dump of all messages in the database will be
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generated. A "--" argument instructs notmuch that the
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remaining arguments are search terms.
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See \fBnotmuch-search-terms\fR(7)
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for details of the supported syntax for <search-terms>.
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.RE
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.SH SEE ALSO
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\fBnotmuch\fR(1), \fBnotmuch-config\fR(1), \fBnotmuch-count\fR(1),
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\fBnotmuch-hooks\fR(5), \fBnotmuch-new\fR(1), \fBnotmuch-reply\fR(1),
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\fBnotmuch-restore\fR(1), \fBnotmuch-search\fR(1),
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\fBnotmuch-search-terms\fR(7), \fBnotmuch-show\fR(1),
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\fBnotmuch-tag\fR(1)
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