mirror of https://github.com/djcb/mu.git
236 lines
7.8 KiB
EmacsLisp
236 lines
7.8 KiB
EmacsLisp
;; mu4e-proc.el -- part of mu4e, the mu mail user agent
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;;
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;; Copyright (C) 2011-2016 Dirk-Jan C. Binnema
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;; Author: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;; Maintainer: Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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;; This file is not part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it 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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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'mu4e-vars)
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(require 'mu4e-utils)
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(require 'mu4e-meta)
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(require 'mu4e-proc-mu)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; internal vars
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(defconst mu4e~proc-name "*mu4e-proc*"
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"Name of the server process, buffer.")
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(defvar mu4e~proc-process nil
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"The mu-server process.")
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;; dealing with the length cookie that precedes expressions
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(defconst mu4e~cookie-pre "\376"
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"Each expression we get from the backend (mu server) starts with
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a length cookie:
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<`mu4e~cookie-pre'><length-in-hex><`mu4e~cookie-post'>.")
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(defconst mu4e~cookie-post "\377"
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"Each expression we get from the backend (mu server) starts with
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a length cookie:
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<`mu4e~cookie-pre'><length-in-hex><`mu4e~cookie-post'>.")
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(defconst mu4e~cookie-matcher-rx
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(concat mu4e~cookie-pre "\\([[:xdigit:]]+\\)" mu4e~cookie-post)
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"Regular expression matching the length cookie.
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Match 1 will be the length (in hex).")
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(defun mu4e~proc-running-p ()
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"Whether the mu process is running."
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(when (and mu4e~proc-process
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(memq (process-status mu4e~proc-process)
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'(run open listen connect stop)))
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t))
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(defsubst mu4e~proc-eat-sexp-from-buf ()
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"'Eat' the next s-expression from `mu4e~proc-buf'.
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Note: this is a string, not an emacs-buffer. `mu4e~proc-buf gets
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its contents from the mu-servers in the following form:
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<`mu4e~cookie-pre'><length-in-hex><`mu4e~cookie-post'>
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Function returns this sexp, or nil if there was none.
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`mu4e~proc-buf' is updated as well, with all processed sexp data
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removed."
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(ignore-errors ;; the server may die in the middle...
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;; mu4e~cookie-matcher-rx:
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;; (concat mu4e~cookie-pre "\\([[:xdigit:]]+\\)]" mu4e~cookie-post)
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(let ((b (string-match mu4e~cookie-matcher-rx mu4e~proc-buf))
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(sexp-len) (objcons))
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(when b
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(setq sexp-len (string-to-number (match-string 1 mu4e~proc-buf) 16))
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;; does mu4e~proc-buf contain the full sexp?
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(when (>= (length mu4e~proc-buf) (+ sexp-len (match-end 0)))
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;; clear-up start
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(setq mu4e~proc-buf (substring mu4e~proc-buf (match-end 0)))
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;; note: we read the input in binary mode -- here, we take the part
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;; that is the sexp, and convert that to utf-8, before we interpret
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;; it.
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(setq objcons (read-from-string
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(decode-coding-string
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(substring mu4e~proc-buf 0 sexp-len)
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'utf-8 t)))
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(when objcons
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(setq mu4e~proc-buf (substring mu4e~proc-buf sexp-len))
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(car objcons)))))))
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(defun mu4e~proc-filter (proc str)
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"A process-filter for the 'mu server' output.
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It accumulates the strings into valid sexps by checking of the
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';;eox' end-of-sexp marker, and then evaluating them.
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The server output is as follows:
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1. an error
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(:error 2 :message \"unknown command\")
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;; eox
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=> this will be passed to `mu4e-error-func'.
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2a. a message sexp looks something like:
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\(
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:docid 1585
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:from ((\"Donald Duck\" . \"donald@example.com\"))
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:to ((\"Mickey Mouse\" . \"mickey@example.com\"))
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:subject \"Wicked stuff\"
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:date (20023 26572 0)
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:size 15165
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:references (\"200208121222.g7CCMdb80690@msg.id\")
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:in-reply-to \"200208121222.g7CCMdb80690@msg.id\"
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:message-id \"foobar32423847ef23@pluto.net\"
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:maildir: \"/archive\"
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:path \"/home/mickey/Maildir/inbox/cur/1312254065_3.32282.pluto,4cd5bd4e9:2,\"
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:priority high
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:flags (new unread)
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:attachments ((2 \"hello.jpg\" \"image/jpeg\") (3 \"laah.mp3\" \"audio/mp3\"))
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:body-txt \" <message body>\"
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\)
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;; eox
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=> this will be passed to `mu4e-header-func'.
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2b. After the list of message sexps has been returned (see 2a.),
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we'll receive a sexp that looks like
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(:found <n>) with n the number of messages found. The <n> will be
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passed to `mu4e-found-func'.
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3. a view looks like:
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(:view <msg-sexp>)
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=> the <msg-sexp> (see 2.) will be passed to `mu4e-view-func'.
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4. a database update looks like:
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(:update <msg-sexp> :move <nil-or-t>)
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=> the <msg-sexp> (see 2.) will be passed to
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`mu4e-update-func', :move tells us whether this is a move to
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another maildir, or merely a flag change.
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5. a remove looks like:
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(:remove <docid>)
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=> the docid will be passed to `mu4e-remove-func'
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6. a compose looks like:
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(:compose <reply|forward|edit|new> [:original<msg-sexp>] [:include <attach>])
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`mu4e-compose-func'."
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(mu4e-log 'misc "* Received %d byte(s)" (length str))
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(setq mu4e~proc-buf (concat mu4e~proc-buf str)) ;; update our buffer
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(let ((sexp (mu4e~proc-eat-sexp-from-buf)))
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(with-local-quit
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(while sexp
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(mu4e-log 'from-server "%S" sexp)
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(cond
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;; a header plist can be recognized by the existence of a :date field
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((plist-get sexp :date)
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(funcall mu4e-header-func sexp))
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;; the found sexp, we receive after getting all the headers
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((plist-get sexp :found)
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(funcall mu4e-found-func (plist-get sexp :found)))
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;; viewing a specific message
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((plist-get sexp :view)
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(funcall mu4e-view-func (plist-get sexp :view)))
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;; receive an erase message
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((plist-get sexp :erase)
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(funcall mu4e-erase-func))
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;; receive a :sent message
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((plist-get sexp :sent)
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(funcall mu4e-sent-func
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(plist-get sexp :docid)
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(plist-get sexp :path)))
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;; received a pong message
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((plist-get sexp :pong)
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(funcall mu4e-pong-func
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(plist-get sexp :props)))
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;; received a contacts message
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;; note: we use 'member', to match (:contacts nil)
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((plist-member sexp :contacts)
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(funcall mu4e-contacts-func
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(plist-get sexp :contacts)))
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;; something got moved/flags changed
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((plist-get sexp :update)
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(funcall mu4e-update-func
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(plist-get sexp :update) (plist-get sexp :move)))
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;; a message got removed
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((plist-get sexp :remove)
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(funcall mu4e-remove-func (plist-get sexp :remove)))
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;; start composing a new message
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((plist-get sexp :compose)
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(funcall mu4e-compose-func
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(plist-get sexp :compose)
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(plist-get sexp :original)
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(plist-get sexp :include)))
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;; do something with a temporary file
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((plist-get sexp :temp)
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(funcall mu4e-temp-func
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(plist-get sexp :temp) ;; name of the temp file
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(plist-get sexp :what) ;; what to do with it
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;; (pipe|emacs|open-with...)
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(plist-get sexp :docid) ;; docid of the message
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(plist-get sexp :param)));; parameter for the action
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;; get some info
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((plist-get sexp :info)
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(funcall mu4e-info-func sexp))
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;; receive an error
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((plist-get sexp :error)
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(funcall mu4e-error-func
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(plist-get sexp :error)
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(plist-get sexp :message)))
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(t (mu4e-message "Unexpected data from server [%S]" sexp)))
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(setq sexp (mu4e~proc-eat-sexp-from-buf))))))
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(defun mu4e~escape (str)
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"Escape STRING for transport -- put it in quotes, and escape existing quotation.
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In particular, backslashes and double-quotes."
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(let ((esc (replace-regexp-in-string "\\\\" "\\\\\\\\" str)))
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(format "\"%s\"" (replace-regexp-in-string "\"" "\\\\\"" esc))))
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(provide 'mu4e-proc)
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;; End of mu4e-proc.el
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