+ (list (cons 'From (notmuch-mua-prompt-for-sender)))))
+ forward-subject ;; Comes from the first message and is
+ ;; applied later.
+ forward-references ;; List of accumulated message-references of forwarded messages
+ forward-queries) ;; List of corresponding message-query
+
+ ;; Generate the template for the outgoing message.
+ (notmuch-mua-mail nil "" other-headers nil (notmuch-mua-get-switch-function))
+
+ (save-excursion
+ ;; Insert all of the forwarded messages.
+ (mapc (lambda (id)
+ (let ((temp-buffer (get-buffer-create
+ (concat "*notmuch-fwd-raw-" id "*"))))
+ ;; Get the raw version of this message in the buffer.
+ (with-current-buffer temp-buffer
+ (erase-buffer)
+ (let ((coding-system-for-read 'no-conversion))
+ (call-process notmuch-command nil t nil "show" "--format=raw" id))
+ ;; Because we process the messages in reverse order,
+ ;; always generate a forwarded subject, then use the
+ ;; last (i.e. first) one.
+ (setq forward-subject (message-make-forward-subject))
+ (push (message-fetch-field "Message-ID") forward-references)
+ (push id forward-queries))
+ ;; Make a copy ready to be forwarded in the
+ ;; composition buffer.
+ (message-forward-make-body temp-buffer)
+ ;; Kill the temporary buffer.
+ (kill-buffer temp-buffer)))
+ ;; `message-forward-make-body' always puts the message at
+ ;; the top, so do them in reverse order.
+ (reverse messages))
+
+ ;; Add in the appropriate subject.
+ (save-restriction
+ (message-narrow-to-headers)
+ (message-remove-header "Subject")
+ (message-add-header (concat "Subject: " forward-subject))
+ (message-remove-header "References")
+ (message-add-header (concat "References: "
+ (mapconcat 'identity forward-references " "))))
+
+ ;; Create a buffer-local queue for tag changes triggered when sending the message
+ (when notmuch-message-forwarded-tags
+ (setq-local notmuch-message-queued-tag-changes
+ (cl-loop for id in forward-queries
+ collect
+ (cons id notmuch-message-forwarded-tags))))
+
+ ;; `message-forward-make-body' shows the User-agent header. Hide
+ ;; it again.
+ (message-hide-headers)
+ (set-buffer-modified-p nil))))