165 lines
5.2 KiB
Org Mode
165 lines
5.2 KiB
Org Mode
#+TITLE: MU LABEL
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#+MAN_CLASS_OPTIONS: :section-id "@SECTION_ID@" :date "@MAN_DATE@"
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#+include: macros.inc
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* NAME
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mu-label - attach labels to messages. Export labels to file, and import them.
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* SYNOPSIS
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*mu* [_COMMON-OPTIONS_] *label* update [UPDATE-OPTIONS] "<query>" --labels [{+,-}<label>]...
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*mu* [_COMMON-OPTIONS_] *label* list [LIST-OPTIONS]
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mu [_COMMON-OPTIONS_] *label* clear [CLEAR-OPTIONS] "<query>"
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mu [_COMMON-OPTIONS_] *label* export [<file>]
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mu [_COMMON-OPTIONS_] *label* import <file>
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* DESCRIPTION
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*mu label* is the sub-command for adding and removing and listing message labels.
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A label is a string associated with a message.
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*mu label* has five sub-commands (i.e., 'sub-sub-commands'):
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- *update* for changing the labels for the messages matching some query
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- *clear* for clearing all labels from messages matching some query
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- *list* to list all labels that are in use in the store
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- *export* to write the label information to a file
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- *import* the read label information from a file
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Important: unlike other message metadata stored by *mu*, labels _cannot_ be restored
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by merely re-indexing messages. Hence, to avoid loosing label information, you
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must *export* it before re-indexing, and *import* afterwards.
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* UPDATE OPTIONS
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The *update* coxmmand changes the labels for messages that match some query. The
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query must be recognized as a single parameter; hence, it must be quoted when
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using from a shell.
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** --labels
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a comma-separated list of labels, each prefixed with either *+* to add that
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label, or *-* to remove it. See *VALID LABELS*.
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*mu4e* users: note the difference, in *mu4e* the label expressions are
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_space_-separated, here they are _comma_-separated.
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** --dry-run
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only print what /would/ change, but do not change anything
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#+include: "muhome.inc" :minlevel 2
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* CLEAR OPTIONS
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The *clear* command removes all labels from messages that match some query. As
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with *update*, the must be recognized as a single parameter, i.e., quote it when
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using from a shell.
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** --dry-run
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only print what /would/ change, but do not change anything
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#+include: "muhome.inc" :minlevel 2
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* LIST OPTIONS
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The *list* command lists all the labels that are currently in use in the store.
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* EXPORT OPTIONS
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The *export* command takes the labels in the store and the messages they apply to,
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and writes this information to a file. You can *import* this file later, to
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restore the labels. The command takes a path to a file or a directory (ending in
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'/') as its argument.
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If a file is specified, *mu* writes the export to it.
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If a directory is specified, *mu* writes to a file in that directory. The
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directory must already exist.
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When neither is specified, *mu* writes to a file in the current directory.
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See *EXPORT FORMAT* below for details about the format.
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* IMPORT OPTIONS
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The *import* command is for restoring the labels from a file created through
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*export* earlier. The command takes a path to a file as its argument.
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See *EXPORT FORMAT* below for details on the format.
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** --dry-run
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only print what would change, but do not change anything
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#+include: "muhome.inc" :minlevel 2
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* VALID LABELS
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*mu* does not wish to limit your creativity, but nevertheless puts a few
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restrictions on what is accepted as a label.
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- a *valid label character* is any character that is not a control-character, a
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blank, or any of *'*, *"*, *`*, */*, *\*, *$*
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- a *valid label* consists of one or more valid label characters, the first of
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which must *not* be either *+* or *-*
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Hence, some valid labels are: ~project-x~, ~c@pybara~, ~fn😃rb~, while some _invalid_
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ones are: ~holiday plan~ and ~+fancy$/dinner~.
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* EXPORT FORMAT
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The formats for import/export are UTF-8 encoded text. The first line starts with
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~;;~ and some internal data. Empty lines are ignored.
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Each entry represents the tags for a message. It consists of three lines. The
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first starts with ~path:~ followed by the file-system path to the message. The
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second line starts with ~message-id:~ followed by the message-id for the message.
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Finally, the third line starts with ~tag:~ followed by space-separated tags for
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the message
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#+begin_example
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path:/home/user/Maildir/inbox/cur/1720645394.99f64f5d81f42ba4.hyperion:2,S
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message-id:669338009127192q7821feh1t826d0c4c90bd8fdf@mail.gmail.com
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labels:foo,bar,cuux
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#+end_example
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Note, the ~message-id:~ is only used if the message cannot be found using ~path:~.
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This adds some fault-tolerance for the case where the precise file-system
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positions have changed since the labels were exported. The upshot of that is
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that if there are _duplicate_ messages (messages with the same message-id), the
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tags are applied to all of them.
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#+include: "exit-code.inc" :minlevel 1
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* EXAMPLES
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Some examples. For the query parameter, make sure to quote the query to ensure
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it is recognized as a single parameter.
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Remove the label "planet" and add the label "dwarf-planet" to all messages that
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have "pluto" in their subject:
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#+begin_export
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$ mu label update "subject:pluto" --labels -planet,+dwarf-planet
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#+end_export
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Clear all labels from messages with the label "boring":
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#+begin_export
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$ mu label clear "label:boring"
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#+end_export
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#+include: "prefooter.inc" :minlevel 1
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* SEE ALSO
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{{{man-link(mu-query,1)}}},
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{{{man-link(mu-find,1)}}},
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