Revert "Stop using Evil (for now)"

This reverts commit b03312fa44.

emacs/.emacs.d/Cask

@@ -15,6 +15,7 @@
 (depends-on "clojure-mode")
 (depends-on "closure-template-html-mode")
 (depends-on "coffee-mode")
+(depends-on "colemak-evil" :git "git://github.com/ryuslash/colemak-evil.git")
 (depends-on "csharp-mode")
 (depends-on "css-eldoc")
 (depends-on "deferred")
@@ -28,6 +29,9 @@
 (depends-on "emms")
 (depends-on "eshell-fringe-status")
 (depends-on "esxml")
+(depends-on "evil")
+(depends-on "evil-nerd-commenter")
+(depends-on "evil-surround")
 (depends-on "eww-lnum")
 (depends-on "expand-region")
 (depends-on "fill-column-indicator")

emacs/.emacs.d/init.el

@@ -318,6 +318,13 @@ MODE1 is enabled and vice-versa."
   (when (fboundp 'prettify-symbols-mode)
     (prettify-symbols-mode arg)))
 
+(defun oni:maybe-switch-to-normal-state ()
+  "Switch the current buffer to normal state.
+
+Only do this when the mode is not in emacs state by default."
+  (unless (memql major-mode (oni:modes-starting-in 'emacs))
+    (evil-normal-state)))
+
 (defun oni:mini-fix-timestamp-string (date-string)
   "A minimal version of Xah Lee's `fix-timestamp-string'.
 Turn DATE-STRING into something else that can be worked with in
@@ -354,6 +361,10 @@ extracts the parts I want to know about."
           (format "[%s - %s]" band title))
       song)))
 
+(defun oni:modes-starting-in (state)
+  "Get a list of the modes whose default state is STATE."
+  (symbol-value (evil-state-property state :modes)))
+
 (defun oni:move-beginning-of-dwim ()
   "Move to beginning of line either after indentation or before."
   (interactive)
@@ -922,6 +933,11 @@ from myaethon2.core.decorators import (
           (topmost-intro-cont first c-lineup-topmost-intro-cont
            c-lineup-gnu-DEFUN-intro-cont))))
 
+(stante-after colemak-evil
+  (define-key evil-insert-state-map (kbd "C-g") #'evil-normal-state)
+  (define-key evil-replace-state-map (kbd "C-g") #'evil-normal-state)
+  (define-key evil-visual-state-map (kbd "C-g") #'evil-normal-state))
+
 (stante-after compile
   (setq compilation-scroll-output t))
 
@@ -1003,6 +1019,27 @@ from myaethon2.core.decorators import (
   (add-to-list 'eshell-output-filter-functions #'oni:eshell-handle-url)
   (add-to-list 'eshell-output-filter-functions #'eshell-truncate-buffer))
 
+(stante-after evil
+  (evil-define-operator oni:evil-sort-lines-operator (beg end)
+    "Sort text."
+    :move-point nil
+    :type line
+    (sort-lines nil beg end))
+
+  (mapc (lambda (mode) (evil-set-initial-state mode 'emacs))
+        '(jabber-roster-mode grep-mode avandu-overview-mode
+                             avandu-article-mode gnus-summary-mode
+                             gnus-article-mode gnus-group-mode
+                             magit-status-mode magit-key-mode
+                             sql-interactive-mode Info-mode
+                             jabber-chat-mode diff-mode prodigy-mode
+                             calculator-mode messages-buffer-mode
+                             help-mode))
+  (evil-set-initial-state 'git-commit-mode 'normal)
+  (require 'evil-nerd-commenter)
+  (define-key evil-normal-state-map ",s" 'oni:evil-sort-lines-operator)
+  (add-hook 'before-save-hook #'oni:maybe-switch-to-normal-state))
+
 (stante-after eww
   (setq eww-download-path               ; Don't go to ~/Downloads
         "~/downloads/"))
@@ -1427,7 +1464,12 @@ from myaethon2.core.decorators import (
   (yas-global-mode)
 
   (require 'popwin)
-  (popwin-mode))
+  (popwin-mode)
+
+  (evil-mode)
+  (when (string-equal system-name "drd")
+    (require 'colemak-evil))
+  (global-evil-surround-mode))
 
 (when (equal system-name "drd")
   (load "eap-autoloads"))