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731697d671
This is a bit of a cheat, since the format does not actually change. On the other hand it is fairly common to do something like this to shared libary SONAMEs when the ABI changes in some subtle way. It does rely on the format-version argument being early enough on the command line to generate a sensible error message.
77 lines
2.7 KiB
EmacsLisp
77 lines
2.7 KiB
EmacsLisp
;;; notmuch-query.el --- provide an emacs api to query notmuch -*- lexical-binding: t -*-
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;;
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;; Copyright © David Bremner
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;;
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;; This file is part of Notmuch.
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;;
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;; Notmuch is free software: you can redistribute it and/or modify it
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;; under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;;
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;; Notmuch is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with Notmuch. If not, see <https://www.gnu.org/licenses/>.
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;;
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;; Authors: David Bremner <david@tethera.net>
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;;; Code:
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(require 'notmuch-lib)
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;;; Basic query function
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(defun notmuch-query-get-threads (search-terms)
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"Return a list of threads of messages matching SEARCH-TERMS.
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A thread is a forest or list of trees. A tree is a two element
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list where the first element is a message, and the second element
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is a possibly empty forest of replies."
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(let ((args '("show" "--format=sexp" "--format-version=5")))
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(when notmuch-show-process-crypto
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(setq args (append args '("--decrypt=true"))))
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(setq args (append args search-terms))
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(apply #'notmuch-call-notmuch-sexp args)))
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;;; Mapping functions across collections of messages
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(defun notmuch-query-map-aux (mapper function seq)
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"Private function to do the actual mapping and flattening."
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(cl-mapcan (lambda (tree)
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(funcall mapper function tree))
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seq))
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(defun notmuch-query-map-threads (fn threads)
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"Apply function FN to every thread in THREADS.
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Flatten results to a list. See the function
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`notmuch-query-get-threads' for more information."
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(notmuch-query-map-aux 'notmuch-query-map-forest fn threads))
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(defun notmuch-query-map-forest (fn forest)
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"Apply function FN to every message in FOREST.
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Flatten results to a list. See the function
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`notmuch-query-get-threads' for more information."
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(notmuch-query-map-aux 'notmuch-query-map-tree fn forest))
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(defun notmuch-query-map-tree (fn tree)
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"Apply function FN to every message in TREE.
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Flatten results to a list. See the function
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`notmuch-query-get-threads' for more information."
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(cons (funcall fn (car tree))
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(notmuch-query-map-forest fn (cadr tree))))
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;;; Predefined queries
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(defun notmuch-query-get-message-ids (&rest search-terms)
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"Return a list of message-ids of messages that match SEARCH-TERMS."
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(notmuch-query-map-threads
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(lambda (msg) (plist-get msg :id))
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(notmuch-query-get-threads search-terms)))
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(provide 'notmuch-query)
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;;; notmuch-query.el ends here
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