+(defcustom notmuch-show-only-matching-messages nil
+ "Only matching messages are shown by default."
+ :type 'boolean
+ :group 'notmuch-show)
+
+(defvar notmuch-show-thread-id nil)
+(make-variable-buffer-local 'notmuch-show-thread-id)
+(put 'notmuch-show-thread-id 'permanent-local t)
+
+(defvar notmuch-show-parent-buffer nil)
+(make-variable-buffer-local 'notmuch-show-parent-buffer)
+(put 'notmuch-show-parent-buffer 'permanent-local t)
+
+(defvar notmuch-show-query-context nil)
+(make-variable-buffer-local 'notmuch-show-query-context)
+(put 'notmuch-show-query-context 'permanent-local t)
+
+(defvar notmuch-show-process-crypto nil)
+(make-variable-buffer-local 'notmuch-show-process-crypto)
+(put 'notmuch-show-process-crypto 'permanent-local t)
+
+(defvar notmuch-show-elide-non-matching-messages nil)
+(make-variable-buffer-local 'notmuch-show-elide-non-matching-messages)
+(put 'notmuch-show-elide-non-matching-messages 'permanent-local t)
+
+(defvar notmuch-show-indent-content t)
+(make-variable-buffer-local 'notmuch-show-indent-content)
+(put 'notmuch-show-indent-content 'permanent-local t)
+
+(defcustom notmuch-show-stash-mlarchive-link-alist
+ '(("Gmane" . "http://mid.gmane.org/")
+ ("MARC" . "http://marc.info/?i=")
+ ("Mail Archive, The" . "http://mail-archive.com/search?l=mid&q=")
+ ;; FIXME: can these services be searched by `Message-Id' ?
+ ;; ("MarkMail" . "http://markmail.org/")
+ ;; ("Nabble" . "http://nabble.com/")
+ ;; ("opensubscriber" . "http://opensubscriber.com/")
+ )
+ "List of Mailing List Archives to use when stashing links.
+
+These URIs are concatenated with the current message's
+Message-Id in `notmuch-show-stash-mlarchive-link'."
+ :type '(alist :key-type (string :tag "Name")
+ :value-type (string :tag "URL"))
+ :group 'notmuch-show)
+
+(defcustom notmuch-show-stash-mlarchive-link-default "Gmane"
+ "Default Mailing List Archive to use when stashing links.
+
+This is used when `notmuch-show-stash-mlarchive-link' isn't
+provided with an MLA argument nor `completing-read' input."
+ :type `(choice
+ ,@(mapcar
+ (lambda (mla)
+ (list 'const :tag (car mla) :value (car mla)))
+ notmuch-show-stash-mlarchive-link-alist))
+ :group 'notmuch-show)
+