essentials/dotfiles/emacs.d/init.el

;;--------------------------------------------------------------------------------------
;;
;;  EMACS Configuration file
;;
;;--------------------------------------------------------------------------------------

(require 'package)

;;--------------------------------------------------------------------------------------
;; Generic line numbering disabler
;;--------------------------------------------------------------------------------------

(defun nolinum ()
  (linum-mode 0)
)

;;--------------------------------------------------------------------------------------
;; Hide menu bar (Opens up frame real estate in console mode)
;;--------------------------------------------------------------------------------------

(menu-bar-mode -1)

;;--------------------------------------------------------------------------------------
;; Hide Startup Message
;;--------------------------------------------------------------------------------------

(setq inhibit-startup-message t)

;;--------------------------------------------------------------------------------------
;; Always follow symbolic links to version controlled files
;;
;; I prefer this option because I generally only get this message when I edit
;; a dotfile under version control, and repeatedly typing "yes" is annoying.
;;--------------------------------------------------------------------------------------

(setq vc-follow-symlinks t)

;;--------------------------------------------------------------------------------------
;; Small fix for keyboard internationalization problems
;;--------------------------------------------------------------------------------------

(set-keyboard-coding-system nil)

;;--------------------------------------------------------------------------------------
;; Disable Splash Screen
;;--------------------------------------------------------------------------------------

(defvar Inhibit-Splash-Screen)
(setq Inhibit-Splash-Screen t)

;;--------------------------------------------------------------------------------------
;; Prefer UTF-8 For Buffers
;;--------------------------------------------------------------------------------------

(prefer-coding-system 'utf-8)
(set-terminal-coding-system 'utf-8)

(defun set-buffer-utf8 ()
  (set-buffer-process-coding-system 'utf-8 'utf-8)
)

(add-hook 'eshell-mode-hook 'set-buffer-utf8)

;;--------------------------------------------------------------------------------------
;; Enable Org-mode and set agenda files
;;--------------------------------------------------------------------------------------

(require 'org)

;; Stuff all of the org files you want under ~/org and they will be loaded automatically
;; and have their TODO items accessible by typing C-c a t
(setq org-agenda-files '("~/org"))
(setq org-log-done t)

;;--------------------------------------------------------------------------------------
;; Prefer unix style line endings
;;--------------------------------------------------------------------------------------

(set-buffer-file-coding-system 'unix)

;;--------------------------------------------------------------------------------------
;; Enable auto-refresh to keep buffers up to date when git or another program
;; modifies them
;;--------------------------------------------------------------------------------------

(global-auto-revert-mode t)

;;--------------------------------------------------------------------------------------
;; IBuffer configurations (C-x C-b)
;;--------------------------------------------------------------------------------------

(setq ibuffer-saved-filter-groups
      '(("default"
         ("Emacs Configuration" (or (filename . ".emacs.d")
                                    (filename . "init.el")
                                    (filename . "package.el")
                                    (filename . "private.el")
                                    (filename . "emacs.d")))
         ("Org" (or (mode . org-mode)
                    (filename . "OrgMode")))
         ("Magit" (name . "magit"))
         ("Help" (or (name . "\*Help\*")
                     (name . "\*Apropos\*")
                     (name . "\*info\*")))
         ("Dired" (mode . dired-mode))
         ;; Dev has groups for all languages you program in
         ("Dev" (or (mode . cc-mode)
                    (filename . ".c")
                    (filename . ".h")
                    (filename . ".java")
                    (filename . ".properties")
                    (filename . ".gradle")
                    (filename . ".am")
                    (mode . yaml-mode))
          )
         ("Text" (or (filename . ".csv")
                     (filename . ".tsv")
                     (filename . ".txt")
                     (filename . ".log")
                     (filename . ".json")))

         ("Emacs" (or (name . "^\\*scratch\\*$")
                      (name . "^\\*Messages\\*$")))
         ("Gnus" (or (mode . message-mode)
                     (mode . bbdb-mode)
                     (mode . mail-mode)
                     (mode . gnus-group-mode)
                     (mode . gnus-summary-mode)
                     (mode . gnus-article-mode)
                     (name . "^\\.bbdb$")
                     (name . "^\\.newsrc-dribble")))
 	 )))

;; Automatically keep buffers up to date and load the filter
(add-hook 'ibuffer-mode-hook
	  '(lambda ()
	     (ibuffer-auto-mode 1)
	     (ibuffer-switch-to-saved-filter-groups "default")))

;; Disable eager line numbering
(add-hook 'ibuffer-mode-hook 'nolinum)

(setq ibuffer-expert t)

(setq ibuffer-show-empty-filter-groups nil)

;;--------------------------------------------------------------------------------------
;; Enable MELPA
;;--------------------------------------------------------------------------------------

(add-to-list 'package-archives
             '("melpa" . "https://melpa.org/packages/") t)
(when (< emacs-major-version 24)
  ;; For important compatibility libraries like cl-lib
  (add-to-list 'package-archives '("gnu" . "https://elpa.gnu.org/packages/")))

(package-initialize)

;; This will force any out of date packages to update automatically
(when (not package-archive-contents)
  (package-refresh-contents))

;;--------------------------------------------------------------------------------------
;; Install and load Packages
;;--------------------------------------------------------------------------------------

(load-file "~/.emacs.d/package.el")

;;--------------------------------------------------------------------------------------
;; Enable ParEdit for Emacs lisp modes
;;--------------------------------------------------------------------------------------

(autoload 'enable-paredit-mode "paredit" t)
(add-hook 'emacs-lisp-mode-hook       #'enable-paredit-mode)
(add-hook 'eval-expression-minibuffer-setup-hook #'enable-paredit-mode)
(add-hook 'ielm-mode-hook             #'enable-paredit-mode)
(add-hook 'lisp-mode-hook             #'enable-paredit-mode)
(add-hook 'lisp-interaction-mode-hook #'enable-paredit-mode)
(add-hook 'scheme-mode-hook           #'enable-paredit-mode)
(add-hook 'clojure-mode-hook          #'enable-paredit-mode)

;;--------------------------------------------------------------------------------------
;; handy editor stuff
;;--------------------------------------------------------------------------------------

(require 'ws-butler)
(ws-butler-global-mode t)

;; Comment this if you dont mind git diffs complaining about missing ending newlines.
(setq require-final-newline t)

;; Add new line if using C-n navigates to the end of the buffer
(setq next-line-add-newlines t)

(require 'whitespace)
(setq whitespace-style '(face lines-tail))
(add-hook 'prog-mode-hook 'whitespace-mode)

;;--------------------------------------------------------------------------------------
;; If python.el is loaded, change the rule column to 80 characters.
;;--------------------------------------------------------------------------------------

(eval-after-load "python"
  '(progn
     (setq whitespace-line-column 80)))

;;--------------------------------------------------------------------------------------
;; Expand region settings
;;--------------------------------------------------------------------------------------

(require 'expand-region)
(pending-delete-mode t) ; Selected region contents are replaced on typing


;;--------------------------------------------------------------------------------------
;; Line Numbering - Note: Might not look good with files with 10,000 or more lines
;;--------------------------------------------------------------------------------------

;; NOTE: Line numbers are toggled with C-s n

(defvar linum-format)
(setq linum-format "%4d  \u2502")

;; TODO: Figure out a way to make linum-relative keep the same linum-mode styles

;;--------------------------------------------------------------------------------------
;; Hook framemove into windmove for seamless window to frame transitions
;;--------------------------------------------------------------------------------------

(setq framemove-hook-into-windmove t)

;;--------------------------------------------------------------------------------------
;; Highlight matching parentheses when cursor is over one
;;--------------------------------------------------------------------------------------

(show-paren-mode 1)

;;--------------------------------------------------------------------------------------
;; Ivy Configuration
;;--------------------------------------------------------------------------------------

(ivy-mode 1)

;(setq projectile-completion-system 'ivy)
(setq magit-complete-read-function 'ivy-completing-read)
(setq ivy-use-virtual-buffers t)

;;-------------------------------------------------------------------------------------
;; Use Grizzl with Projectile
;;-------------------------------------------------------------------------------------

(setq projectile-completion-system 'grizzl)

;;-------------------------------------------------------------------------------------
;; ZSH script detection
;;------------------------------------------------------------------------------------

(add-hook 'sh-mode-hook
          (lambda ()
            (if (string-match "\\.zsh$" buffer-file-name)
                                (sh-set-shell "zsh"))))

;;-------------------------------------------------------------------------------------
;; Enable and Configure `company-mode`
;;------------------------------------------------------------------------------------

(global-company-mode t)
(add-hook 'after-init-hook 'global-company-mode)

;;-------------------------------------------------------------------------------------
;; Alignment
;;-------------------------------------------------------------------------------------

(setq-default indent-tabs-mode nil)
(setq-default tab-width 2)

;; Make sure the tab key only indents (rather than also doing completion)
(setq tab-always-indent t)

;; Make return key also indent
(electric-indent-mode 1)

;;-------------------------------------------------------------------------------------
;; Flycheck
;;-------------------------------------------------------------------------------------

(add-hook 'after-init-hook #'global-flycheck-mode)
(with-eval-after-load 'flycheck
  (setq-default flycheck-disabled-checkers '(emacs-lisp-checkdoc)))

;;-------------------------------------------------------------------------------------
;; Projectile Configuration
;;-------------------------------------------------------------------------------------

(projectile-global-mode)

;;-------------------------------------------------------------------------------------
;; Neotree Configuration
;;-------------------------------------------------------------------------------------

(setq neo-theme 'ascii)
(setq neo-vc-integration '(char))
(setq neo-persist-show t)

(add-hook 'neo-enter-hook 'redraw-display)

;;-------------------------------------------------------------------------------------
;; 2 Space Region Indenting Functions
;;-------------------------------------------------------------------------------------

(defun my-indent-region (N)
  (interactive "p")
  (if (use-region-p)
      (progn (indent-rigidly (region-beginning) (region-end) (* N 2))
             (setq deactivate-mark nil))
    (self-insert-command N)))

(defun my-unindent-region (N)
  (interactive "p")
  (if (use-region-p)
      (progn (indent-rigidly (region-beginning) (region-end) (* N -2))
             (setq deactivate-mark nil))
    (self-insert-command N)))

;;--------------------------------------------------------------------------------------
;; CC-Mode Settings
;;-------------------------------------------------------------------------------------

;; Keep character limit to 80
(eval-after-load "c-mode"
  '(progn
    (setq whitespace-line-column 80)))

(eval-after-load "c++-mode"
  '(progn
     (setq whitespace-line-column 80)))


(setq-default c-basic-offset 4)           ;; NASA Style Guide says 4 spaces is optimal
(setq-default c++-basic-offset 4)         ;;
(setq-default c-default-style "linux")    ;; Use Linux code style
(setq-default c++-default-style "linux")  ;;

(add-hook 'c-mode-hook 'irony-mode)
(add-hook 'c++-mode-hook 'irony-mode)

;; Backend for Company
(defun my-c-mode-hook ()
  (eval-after-load 'company
    '(add-to-list 'company-backends 'company-irony)))

(defun my-c++-mode-hook ()
  (eval-after-load 'company
    '(add-to-list 'company-backends 'company-irony)))

(add-hook 'c-mode-hook 'my-c-mode-hook)
(add-hook 'c++-mode-hook 'my-c++-mode-hook)

;; I use meson mostly for C/C++ development so this hook lives here
(add-hook 'meson-mode-hook 'company-mode)

;;--------------------------------------------------------------------------------------
;; Java Mode Setup
;;-------------------------------------------------------------------------------------

(defun my-java-mode-hook ()
  (require 'eclim)
  (eclim-mode t)
  (require 'company-emacs-eclim)
  (company-emacs-eclim-setup)
  )

(add-hook 'java-mode-hook 'my-java-mode-hook)

;;-------------------------------------------------------------------------------------
;; Key Bindings
;;-------------------------------------------------------------------------------------

;; Try to force alt to be the meta key
(setq x-alt-keysym 'meta)

;; Neotree
(global-set-key [f8] 'neotree-toggle)

(global-set-key (kbd "C-d") nil)
(global-set-key (kbd "C-m") nil)
(global-set-key (kbd "RET") nil)

;; Unbind C-s from Isearch to make room for swiper
(global-set-key (kbd "C-s") nil)

(global-set-key (kbd "C-x C-b") nil)

(global-set-key (kbd "C-x C-f") nil)

(global-set-key (kbd "C-c r") nil)

(global-set-key (kbd "C-c n") nil)

(global-set-key (kbd "C-h C-k") nil)

;; Pane navigation
(global-set-key (kbd "M-h") 'windmove-left)
(global-set-key (kbd "M-j") 'windmove-down)
(global-set-key (kbd "M-k") 'windmove-up)
(global-set-key (kbd "M-l") 'windmove-right)

;; Delete surrounding
(global-set-key (kbd "C-d s") 'delete-pair)

;; Git utility
(global-set-key (kbd "C-x g s") 'magit-status)
(global-set-key (kbd "C-x g b") 'magit-blame-popup)
(global-set-key (kbd "C-x g p") 'magit-dispatch-popup)
(global-set-key (kbd "C-x g f") 'magit-file-popup)

;; Fix RET
(global-set-key (kbd "RET") 'newline-and-indent)

;; Ivy Bindings
(global-set-key (kbd "C-x C-f") 'counsel-find-file)

;; Swiper
(global-set-key (kbd "C-s") 'swiper)

;; Better M-x
;;(global-set-key (kbd "M-x") 'counsel-M-x)

;; IBuffer
(global-set-key (kbd "C-x C-b") 'ibuffer)

;; Line number toggle
(global-set-key (kbd "C-c n") 'linum-mode)

;; Relative line numbering
(global-set-key (kbd "C-c r") 'linum-relative-toggle)

;; Expand region
(global-set-key (kbd "C-h C-k") 'er/expand-region)

;; Org mode specific keybinds
(global-set-key (kbd "C-c l") 'org-store-link)
(global-set-key (kbd "C-c a") 'org-agenda)

;; More convenient region indenting
(global-set-key (kbd "M->") 'my-indent-region)
(global-set-key (kbd "M-<") 'my-unindent-region)

;;--------------------------------------------------------------------------------------
;; Theme
;;--------------------------------------------------------------------------------------

(set-frame-parameter nil 'background-mode 'dark)
(set-terminal-parameter nil 'background-mode 'dark)
(load-theme 'zenburn t)

;; 10 pt font
(set-frame-font "inconsolata")
(set-face-attribute 'default nil :height 100)

(powerline-center-theme)













(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(package-selected-packages
   (quote
    (counsel zenburn-theme wrap-region swiper stylus-mode smex slim-mode scss-mode sass-mode rust-mode rspec-mode robe rainbow-delimiters projectile powerline paredit neotree magit livescript-mode linum-relative less-css-mode jsx-mode js2-mode jade-mode grizzl golden-ratio gitignore-mode flymake-ruby flycheck-rust flycheck-pos-tip flycheck-haskell flycheck-clojure fill-column-indicator feature-mode expand-region esh-help enh-ruby-mode coffee-mode circe ag ac-inf-ruby))))
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 )