Emacs + clojure. Autocompletion data from all source files in project

Question

I've been developing C# applications for a long time. Commercial IDEs and tools provide extremely good code completion features. I'm now learning clojure and I really miss familiar workflow.

So, about emacs. I've installed nrepl, ac-nrepl and clojure-mode. Auto completion works fine in repl. It also works for symbols in current buffer. But not for:

1. symbols from other project files
2. external libraries (managed with leiningen).

Is there any existing package that fully covers cases 1 and 2?

My clojure-related config:

;;;;;;;;;;;;;;;
;;; clojure ;;;
;;;;;;;;;;;;;;;

(require 'nrepl)

;; Configure nrepl.el
(setq nrepl-hide-special-buffers t)
(setq nrepl-popup-stacktraces-in-repl t)
(setq nrepl-history-file "~/.emacs.d/nrepl-history")

;; Some default eldoc facilities
(add-hook 'nrepl-connected-hook
      (defun pnh-clojure-mode-eldoc-hook ()
        (add-hook 'clojure-mode-hook 'turn-on-eldoc-mode)
        (add-hook 'nrepl-interaction-mode-hook 'nrepl-turn-on-eldoc-mode)
        (nrepl-enable-on-existing-clojure-buffers)))

;; Repl mode hook
(add-hook 'nrepl-mode-hook 'subword-mode)

;; Auto completion for NREPL
(require 'ac-nrepl)
(eval-after-load "auto-complete"
  '(add-to-list 'ac-modes 'nrepl-mode))

(add-hook 'nrepl-mode-hook 'ac-nrepl-setup)
(add-hook 'clojure-nrepl-mode-hook 'ac-nrepl-setup)

(define-key clojure-mode-map (kbd "C-<ret>") 'nrepl-eval-expression-at-point)

;(global-set-key (kbd "C-<ret>") 'nrepl-eval-expression-at-point)

;;;;;;;;;;;;;;;;;;;;;
;;; auto-complete ;;; 
;;;;;;;;;;;;;;;;;;;;;

(require 'auto-complete-config)
(add-to-list 'ac-dictionary-directories "~/.emacs.d/ac-dict")
(setq ac-delay 0.0)
(setq ac-use-quick-help t)
(setq ac-quick-help-delay 0.05)
(setq ac-use-fuzzy 1)
(setq ac-auto-start 1)
(setq ac-auto-show-menu 1)
(ac-config-default)

(define-key ac-mode-map (kbd "C-SPC") 'auto-complete)

Answer 1

After installing a fresh nrepl and ac-nrepl, here is what I put into the .emacs

(package-initialize)
(require 'auto-complete)
(global-auto-complete-mode)
(add-hook 'nrepl-mode-hook 'ac-nrepl-setup)
(add-hook 'nrepl-interaction-mode-hook 'ac-nrepl-setup)
(add-hook 'clojure-nrepl-mode-hook 'ac-nrepl-setup)

When I now nrepl-jack-in into a test-project and open a file of it, I have tab-completion on every namespace currently loaded in the project. It seems like you forgot the 'ac-nrepl-setup on the 'nrepl-interaction-mode-hook.