From 925d624f4695d46e4b27c1c1b3be67f34a3ea3eb Mon Sep 17 00:00:00 2001
From: Bozhidar Batsov <bozhidar@tradeo.com>
Date: Mon, 11 Mar 2013 20:13:06 +0200
Subject: [PATCH] Add prelude-update command

---
 README.md            | 2 ++
 core/prelude-core.el | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 0431a6d..1958955 100644
--- a/README.md
+++ b/README.md
@@ -101,6 +101,8 @@ $ git pull
 The `path/to/prelude/installation` is usually `~/.emacs.d` (at least
 on Unix systems).
 
+Alternatively you can run <kbd>M-x prelude-update</kbd> from Emacs itself.
+
 It's generally a good idea to stop Emacs before you do the update. The
 next time Prelude starts it will install any new dependencies (if
 there are such).
diff --git a/core/prelude-core.el b/core/prelude-core.el
index 5aab378..c215cbc 100644
--- a/core/prelude-core.el
+++ b/core/prelude-core.el
@@ -327,5 +327,14 @@ Doesn't mess with special buffers."
   (exchange-point-and-mark)
   (deactivate-mark nil))
 
+(defun prelude-update ()
+  "Update Prelude to its latest version."
+  (interactive)
+  (when (y-or-n-p "Do you want to update Prelude?")
+    (message "Updating Prelude...")
+    (cd prelude-dir)
+    (shell-command "git pull")
+    (message "Update finished. Restart Emacs to complete the process.")))
+
 (provide 'prelude-core)
 ;;; prelude-core.el ends here