+(defun notmuch-tag (query &rest tags)
+ "Add/remove tags in TAGS to messages matching QUERY.
+
+TAGS should be a list of strings of the form \"+TAG\" or \"-TAG\" and
+QUERY should be a string containing the search-query.
+
+Note: Other code should always use this function alter tags of
+messages instead of running (notmuch-call-notmuch-process \"tag\" ..)
+directly, so that hooks specified in notmuch-before-tag-hook and
+notmuch-after-tag-hook will be run."
+ (run-hooks 'notmuch-before-tag-hook)
+ (apply 'notmuch-call-notmuch-process
+ (append (list "tag") tags (list "--" query)))
+ (run-hooks 'notmuch-after-tag-hook))
+
+(defcustom notmuch-before-tag-hook nil
+ "Hooks that are run before tags of a message are modified.
+
+'tags' will contain the tags that are about to be added or removed as
+a list of strings of the form \"+TAG\" or \"-TAG\".
+'query' will be a string containing the search query that determines
+the messages that are about to be tagged"
+
+ :type 'hook
+ :options '(hl-line-mode)
+ :group 'notmuch)
+
+(defcustom notmuch-after-tag-hook nil
+ "Hooks that are run after tags of a message are modified.
+
+'tags' will contain the tags that were added or removed as
+a list of strings of the form \"+TAG\" or \"-TAG\".
+'query' will be a string containing the search query that determines
+the messages that were tagged"
+ :type 'hook
+ :options '(hl-line-mode)
+ :group 'notmuch)
+