CentOS 7.x .emacs file

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For CentOS 7.x use following .emacs file after:

• Fully update emacs

yum -y install emacs

• If erlang is not desired then comment erlang related lines. If it is desired then install erlang using:

yum -y install erlang
yum -y install yaws

• For org-export-to-pdf install

yum -y install texlive texlive-wrapfig #Very large package set

• The first start of emacs after using this file may take some time as many packages will get downloaded and compiled.

;; .emacs - Assumes emacs 24.3-18+, org 7.9.3f+ 
;; Considerable information learned from http://www.aaronbedra.com/emacs.d/

;; Set full username and email address
(setq user-full-name "Saurabh Barjatiya")
(setq user-mail-address "saurabh [at] sbarjatiya.com")   ; ***Correct Email address***

;Modify path as neeed
;(setenv "PATH" (concat "/usr/local/bin:/opt/local/bin:/usr/bin:/bin" (getenv "PATH")))

;Package common lisp is required to add more functionality to emacs lisp to
;allow easier configuration of emacs.  Without this loop used further in this file is not available.
(require 'cl)

;; Initialize built-in package manager
(load "package")
(package-initialize)
;(add-to-list 'package-archives
;             '("marmalade" . "http://marmalade-repo.org/packages/"))
(add-to-list 'package-archives
             '("melpa" . "http://melpa.milkbox.net/packages/") t)

(setq package-archive-enable-alist '(("melpa" deft magit)))

;; define list of default packages to install
(defvar saurabh/packages '(ac-slime
                          auto-complete
                          autopair
                          ;clojure-mode
                          coffee-mode
                          csharp-mode
                          deft
                          erlang
                          feature-mode
                          flycheck
                          gist
                          go-mode
                          graphviz-dot-mode
                          haml-mode
                          haskell-mode
                          htmlize
                          ;magit
                          markdown-mode
                          marmalade
                          nodejs-repl
                          o-blog
                          org
                          paredit
                          php-mode
                          puppet-mode
                          restclient
                          rvm
                          scala-mode
                          smex
                          sml-mode
                          solarized-theme
                          web-mode
                          writegood-mode
                          yaml-mode)
  "Default packages")

;;Install default packages
(defun saurabh/packages-installed-p ()
  (loop for pkg in saurabh/packages
        when (not (package-installed-p pkg)) do (return nil)
        finally (return t)))

(unless (saurabh/packages-installed-p)
  (message "%s" "Refreshing package database...")
  (package-refresh-contents)
  (dolist (pkg saurabh/packages)
    (when (not (package-installed-p pkg))
      (package-install pkg))))



;; default to better frame titles
(setq frame-title-format
      (concat  "%b - emacs@" (system-name)))

;; default to unified diffs
(setq diff-switches "-u")

;;Preventing emacs from creating backup files
(setq make-backup-files nil)

;;Preventing emacs from creating auto-save files
(setq auto-save-default nil)

;;Use visual-line-mode for word wrap
(global-visual-line-mode 1)

;;Wrap lines at 70 columns
(set-fill-column 70)

;;Wrap lines at 70 columns and enable auto-fill-mode automatically
(setq-default fill-column 70)
(add-hook 'text-mode-hook 'turn-on-auto-fill)

;;Set default font-size to 120 (12pt)
(set-face-attribute 'default nil :height 120) 


;;Setting up Emacs for use with Erlang
;;Update the below mentioned paths appropriately based on installation
(add-to-list 'load-path "/usr/lib64/erlang/lib/tools-2.6.13/emacs/")
(require 'erlang-start)

(add-to-list 'auto-mode-alist '("\\.erl?$" . erlang-mode))
(add-to-list 'auto-mode-alist '("\\.hrl?$" . erlang-mode))
(add-to-list 'auto-mode-alist '("\\.escript?$" . erlang-mode))

(setq erlang-root-dir "/usr/lib64/erlang")
(add-to-list 'exec-path "/usr/lib64/erlang/bin")
(setq erlang-man-root-dir "/usr/lib64/erlang/man")


;;Disable splash screen at start-up
(setq inhibit-splash-screen t)

;;Make emacs copy-paste M-w, C-y work with system copy-paste
(setq x-select-enable-clipboard t)

;;To maximize emacs window at start-up
(defun toggle-fullscreen ()
  (interactive)
  (x-send-client-message nil 0 nil "_NET_WM_STATE" 32
                 '(2 "_NET_WM_STATE_MAXIMIZED_VERT" 0))
  (x-send-client-message nil 0 nil "_NET_WM_STATE" 32
                 '(2 "_NET_WM_STATE_MAXIMIZED_HORZ" 0))
)
(toggle-fullscreen)


;; PDFs visited in Org-mode are opened in Evince and not in the default choice
(add-hook 'org-mode-hook
      '(lambda ()
         (delete '("\\.pdf\\'" . default) org-file-apps)
         (add-to-list 'org-file-apps '("\\.pdf\\'" . "evince %s"))))


;;For setting tab to 4 spaces for .py programs
(add-hook 'python-mode-hook
      (lambda ()
        (setq indent-tabs-mode 'nil)
        (setq tab-width 4)
        (setq python-indent 4)))


;;To set proper command for exporting latex to pdf from org-mode
(setq org-latex-to-pdf-process (quote ("pdflatex %f" "bibtex %b" "pdflatex %f")))
(setq org-latex-pdf-process (quote ("pdflatex %f" "bibtex %b" "pdflatex %f")))

;;Add INPROGRESS along with TODO, DONE.  Also enable flyspell-mode and writegood-mode
;;while org-mode is active
(setq org-log-done 'nil
      org-todo-keywords '((sequence "TODO" "INPROGRESS" "DONE"))
      org-todo-keyword-faces '(("INPROGRESS" . (:foreground "blue" :weight bold))))
(add-hook 'org-mode-hook
          (lambda ()
            (flyspell-mode)))
(add-hook 'org-mode-hook
          (lambda ()
            (writegood-mode)))

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