Extract Helm support into a separate module

modules/prelude-helm.el

@@ -0,0 +1,58 @@
+;;; prelude-helm.el --- Helm setup
+;;
+;; Copyright © 2011-2013 Bozhidar Batsov
+;;
+;; Author: Bozhidar Batsov <bozhidar@batsov.com>
+;; URL: https://github.com/bbatsov/prelude
+;; Version: 1.0.0
+;; Keywords: convenience
+
+;; This file is not part of GNU Emacs.
+
+;;; Commentary:
+
+;; Some config for Helm.
+
+;;; License:
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License
+;; as published by the Free Software Foundation; either version 3
+;; of the License, or (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Code:
+
+(prelude-require-packages '(helm helm-projectile))
+
+(require 'helm-misc)
+(require 'helm-projectile)
+
+(defun helm-prelude ()
+  "Preconfigured `helm'."
+  (interactive)
+  (condition-case nil
+      (if (projectile-project-root)
+          (helm-projectile)
+        ;; otherwise fallback to `helm-mini'
+        (helm-mini))
+    ;; fall back to helm mini if an error occurs (usually in `projectile-project-root')
+    (error (helm-mini))))
+
+(eval-after-load 'prelude-mode
+  '(define-key prelude-mode-map (kbd "C-c h") 'helm-prelude))
+
+(push "Press <C-c h> to navigate a project in Helm." prelude-tips)
+
+(provide 'prelude-helm)
+
+;;; prelude-helm.el ends here