In Vim I can :set wrapscan so that when I do an incremental search, the cursor jumps to the first match whether the first match is above or below the cursor.
In Emacs, if I start a search via C-s, the search fails saying Failing I-search if the first match is above the cursor. If I hit C-s again it then wraps the search, saying Wrapped I-search. How do I wrap and jump the cursor by default as in Vim, without having to C-s a second time?
The easiest way to do this is to use the following defadvice:
(defadvice isearch-repeat (after isearch-no-fail activate)
(unless isearch-success
(ad-disable-advice 'isearch-repeat 'after 'isearch-no-fail)
(ad-activate 'isearch-repeat)
(isearch-repeat (if isearch-forward 'forward))
(ad-enable-advice 'isearch-repeat 'after 'isearch-no-fail)
(ad-activate 'isearch-repeat)))
When Isearch fails, it immediately tries again with wrapping. Note that it is important to temporarily disable this defadvice to prevent an infinite loop when there are no matches.
Jurta's answer got most of the way there. This is the wanted behavior:
;; Prevents issue where you have to press backspace twice when
;; trying to remove the first character that fails a search
(define-key isearch-mode-map [remap isearch-delete-char] 'isearch-del-char)
(defadvice isearch-search (after isearch-no-fail activate)
(unless isearch-success
(ad-disable-advice 'isearch-search 'after 'isearch-no-fail)
(ad-activate 'isearch-search)
(isearch-repeat (if isearch-forward 'forward))
(ad-enable-advice 'isearch-search 'after 'isearch-no-fail)
(ad-activate 'isearch-search)))
