diff --git a/README.md b/README.md deleted file mode 100644 index 6fe9ddd..0000000 --- a/README.md +++ /dev/null @@ -1,968 +0,0 @@ - - -**Table of Contents** *generated with [DocToc](http://doctoc.herokuapp.com/)* - -- [About](#about) -- [Configurations](#configurations) - - [Meta](#meta) - - [Package](#package) - - [Mac OS X](#mac-os-x) - - [Require](#require) - - [Sane defaults](#sane-defaults) - - [Modes](#modes) - - [Visual](#visual) - - [Ido](#ido) - - [Calendar](#calendar) - - [Mail](#mail) - - [Flyspell](#flyspell) - - [Org](#org) - - [Interactive functions](#interactive-functions) - - [Key bindings](#key-bindings) - - [Advice](#advice) -- [Language mode specific](#language-mode-specific) - - [Lisp](#lisp) - - [Emacs Lisp](#emacs-lisp) - - [Common lisp](#common-lisp) - - [Scheme](#scheme) - - [Java and C](#java-and-c) - - [Assembler](#assembler) - - [LaTeX](#latex) - - [Python](#python) - - [Haskell](#haskell) - - [Matlab](#matlab) - - - -# About - -This is a Emacs configuration file written in `org-mode`. There are a few -reasons why I wanted to do this. My `.emacs.d/` was a mess, and needed a -proper clean-up. Also I like keeping all my configurations in a single -file, using `org-mode` I can keep this file *organized*. I aim to briefly -explain all my configurations. - -# Configurations - -## Meta - -Emacs can only load `.el`-files. We can use `C-c C-v t` to run -`org-babel-tangle`, which extracts the code blocks from the current file -into a source-specific file (in this case a `.el`-file). - -To avoid doing this each time a change is made we can add a function to -the `after-save-hook` ensuring to always tangle and byte-compile the -`org`-document after changes. - -```lisp -(defun init-hook () - "If the current buffer is 'init.org' the code-blocks are -tangled, and the tangled file is compiled." - (when (equal (buffer-file-name) - (expand-file-name (concat user-emacs-directory "init.org"))) - (org-babel-tangle) - (byte-compile-file (concat user-emacs-directory "init.el")))) - -(add-hook 'after-save-hook 'init-hook) -``` - -## Package - -Managing extensions for Emacs is simplified using `package` which -is built in to Emacs 24 and newer. To load downloaded packages we -need to initialize `package`. - -```lisp -(require 'package) -(package-initialize) -``` - -Packages can be fetched from different mirrors, [melpa](http://melpa.milkbox.net/#/) is the largest -archive and is well maintained. - -```lisp -(add-to-list 'package-archives - '("MELPA" . "http://melpa.milkbox.net/packages/") t) -``` - -We can define a predicate that tells us wither or not the newest version -of a package is installed. - -```lisp -(defun newest-package-installed-p (package) - "Return true if the newest available PACKAGE is installed." - (when (package-installed-p package) - (let* ((local-pkg-desc (or (assq package package-alist) - (assq package package--builtins))) - (newest-pkg-desc (assq package package-archive-contents))) - (and local-pkg-desc newest-pkg-desc - (version-list-= (package-desc-vers (cdr local-pkg-desc)) - (package-desc-vers (cdr newest-pkg-desc))))))) -``` - -Let's write a function to install a package if it is not installed or -upgrades it if a new version has been released. Here our predicate comes -in handy. - -```lisp -(defun upgrade-or-install-package (package) - "Unless the newest available version of PACKAGE is installed -PACKAGE is installed and the current version is deleted." - (unless (newest-package-installed-p package) - (let ((pkg-desc (assq package package-alist))) - (when pkg-desc - (package-delete (symbol-name package) - (package-version-join - (package-desc-vers (cdr pkg-desc))))) - (package-install package)))) -``` - -The `package-refresh-contents` function downloads archive descriptions, -this is a major bottleneck in this configuration. To avoid this we can -try to only check for updates once every day or so. Here are three -variables. The first specifies how often we should check for updates. The -second specifies wither one should update during the initialization. The -third is a path to a file where a time-stamp is stored in order to check -when packages were updated last. - -```lisp -(defvar days-between-updates 1) -(defvar do-package-update-on-init t) -(defvar package-last-update-file - (expand-file-name (concat user-emacs-directory ".package-last-update"))) -``` - -The tricky part is figuring out when the last time the Emacs was updated! -Here is a hacky way of doing it, using [time-stamps](http://www.gnu.org/software/emacs/manual/html_node/emacs/Time-Stamps.html). By adding a -time-stamp to the a file, we can determine wither or not to do an -update. After that we must run the `time-stamp`-function to update the -time-stamp. - -```lisp -(require 'time-stamp) -;; Open the package-last-update-file -(with-temp-file package-last-update-file - (if (file-exists-p package-last-update-file) - (progn - ;; Insert it's original content's. - (insert-file-contents package-last-update-file) - (let ((start (re-search-forward time-stamp-start nil t)) - (end (re-search-forward time-stamp-end nil t))) - (when (and start end) - ;; Assuming we have found a time-stamp, we check determine if it's - ;; time to update. - (setq do-package-update-on-init - (<= days-between-updates - (days-between - (current-time-string) - (buffer-substring-no-properties start end)))) - ;; Remember to update the time-stamp. - (when do-package-update-on-init - (time-stamp))))) - ;; If no such file exists it is created with a time-stamp. - (insert "Time-stamp: <>") - (time-stamp))) -``` - -Now we can use the function above to make sure packages are installed and -up to date. Here are some packages I find useful (some of these -configurations are also dependent on them). - -```lisp -(when (and do-package-update-on-init - (y-or-n-p "Update all packages?")) - (package-refresh-contents) - - (dolist (package - '(ac-geiser ; Auto-complete backend for geiser - ac-slime ; An auto-complete source using slime completions - ace-jump-mode ; quick cursor location minor mode - auto-compile ; automatically compile Emacs Lisp libraries - auto-complete ; auto completion - elscreen ; window session manager - expand-region ; Increase selected region by semantic units - flx-ido ; flx integration for ido - ido-vertical-mode ; Makes ido-mode display vertically. - geiser ; GNU Emacs and Scheme talk to each other - haskell-mode ; A Haskell editing mode - jedi ; Python auto-completion for Emacs - magit ; control Git from Emacs - markdown-mode ; Emacs Major mode for Markdown-formatted files. - matlab-mode ; MATLAB integration with Emacs. - monokai-theme ; A fruity color theme for Emacs. - move-text ; Move current line or region with M-up or M-down - multiple-cursors ; Multiple cursors for Emacs. - org ; Outline-based notes management and organizer - paredit ; minor mode for editing parentheses - powerline ; Rewrite of Powerline - pretty-lambdada ; the word `lambda' as the Greek letter. - smex)) ; M-x interface with Ido-style fuzzy matching. - (upgrade-or-install-package package)) - ;; This package is only relevant for Mac OS X. - (when (memq window-system '(mac ns)) - (upgrade-or-install-package 'exec-path-from-shell))) -``` - -## Mac OS X - -I run this configuration mostly on Mac OS X, so we need a couple of -settings to make things work smoothly. In the package section -`exec-path-from-shell` is included (only if you're running OS X), this is -to include environment-variables from the shell. It makes useing Emacs -along with external processes a lot simpler. I also prefer using the -`Command`-key as the `Meta`-key. - -```lisp -(when (memq window-system '(mac ns)) - (setq mac-option-modifier nil - mac-command-modifier 'meta - x-select-enable-clipboard t) - (exec-path-from-shell-initialize)) -``` - -## Require - -Some features are not loaded by default to minimize initialization time, -so they have to be required (or loaded, if you will). - -```lisp -(dolist (feature - '(auto-compile ; auto-compile .el files - auto-complete-config ; a configuration for auto-complete-mode - jedi ; auto-completion for python - matlab ; matlab-mode - ob-matlab ; org-babel matlab - ox-latex ; the latex-exporter (from org) - ox-md ; Markdown exporter (from org) - pretty-lambdada ; show 'lambda' as the greek letter. - recentf ; recently opened files - tex-mode)) ; TeX, LaTeX, and SliTeX mode commands - (require feature)) -``` - -## Sane defaults - -These are what *I* consider to be saner defaults. - -We can set variables to whatever value we'd like using `setq`. - -```lisp -(setq initial-scratch-message nil ; Clean scratch buffer. - inhibit-startup-message t ; No splash screen please. - default-input-method "TeX" ; Use TeX when toggeling input method. - ring-bell-function 'ignore ; Quite as a mouse. - doc-view-continuous t ; At page edge goto next/previous. - echo-keystrokes 0.1) ; Show keystrokes asap. - -;; Some mac-bindings interfere with Emacs bindings. -(when (boundp 'mac-pass-command-to-system) - (setq mac-pass-command-to-system nil)) - -``` - -Some variables are buffer-local, so changing them using `setq` will only -change them in a single buffer. Using `setq-default` we change the -buffer-local variable's default value. - -```lisp -(setq-default fill-column 76 ; Maximum line width. - indent-tabs-mode nil ; Use spaces instead of tabs. - split-width-threshold 100 ; Split verticly by default. - auto-fill-function 'do-auto-fill) ; Auto-fill-mode everywhere. -``` - -The `load-path` specifies where Emacs should look for `.el`-files (or -Emacs lisp files). I have a directory called `site-lisp` where I keep all -extensions that have been installed manually (these are mostly my own -projects). - -```lisp -(let ((default-directory (concat user-emacs-directory "site-lisp/"))) - (when (file-exists-p default-directory) - (normal-top-level-add-to-load-path '(".")) - (normal-top-level-add-subdirs-to-load-path))) -``` - -Answering *yes* and *no* to each question from Emacs can be tedious, a -single *y* or *n* will suffice. - -```lisp -(fset 'yes-or-no-p 'y-or-n-p) -``` - -To avoid file system clutter we put all auto saved files in a single -directory. - -```lisp -(defvar emacs-autosave-directory - (concat user-emacs-directory "autosaves/") - "This variable dictates where to put auto saves. It is set to a - directory called autosaves located wherever your .emacs.d/ is - located.") - -;; Sets all files to be backed up and auto saved in a single directory. -(setq backup-directory-alist - `((".*" . ,emacs-autosave-directory)) - auto-save-file-name-transforms - `((".*" ,emacs-autosave-directory t))) -``` - -Set `utf-8` as preferred coding system. - -```lisp -(set-language-environment "UTF-8") -``` - -By default the `narrow-to-region` command is disabled and issues a -warning, because it might confuse new users. I find it useful sometimes, -and don't want to be warned. - -```lisp -(put 'narrow-to-region 'disabled nil) -``` - -Call `auto-complete` default configuration, which enables `auto-complete` -globally. - -```lisp -(ac-config-default) -``` - -Automaticly revert `doc-view`-buffers when the file changes on disk. - -```lisp -(add-hook 'doc-view-mode-hook 'auto-revert-mode) -``` - -## Modes - -There are some modes that are enabled by default that I don't find -particularly useful. We create a list of these modes, and disable all of -these. - -```lisp -(dolist (mode - '(tool-bar-mode ; No toolbars, more room for text. - scroll-bar-mode ; No scroll bars either. - blink-cursor-mode)) ; The blinking cursor gets old. - (funcall mode 0)) -``` - -Let's apply the same technique for enabling modes that are disabled by -default. - -```lisp -(dolist (mode - '(abbrev-mode ; E.g. sopl -> System.out.println. - auto-compile-on-load-mode ; Compile .el files on load ... - auto-compile-on-save-mode ; ... and save. - column-number-mode ; Show column number in mode line. - delete-selection-mode ; Replace selected text. - recentf-mode ; Recently opened files. - show-paren-mode)) ; Highlight matching parentheses. - (funcall mode 1)) -``` - -This makes `.md`-files open in `markdown-mode`. - -```lisp -(add-to-list 'auto-mode-alist '("\\.md\\'" . markdown-mode)) -``` - -## Visual - -Change the color-theme to `monokai` (downloaded using `package`). - -```lisp -(load-theme 'monokai t) -``` - -Use the [Inconsolata](http://www.levien.com/type/myfonts/inconsolata.html) font if it's installed on the system. - -```lisp -(when (member "Inconsolata-g" (font-family-list)) - (set-face-attribute 'default nil :font "Inconsolata-g-11")) -``` - -[Powerline](https://github.com/milkypostman/powerline) is an extension to customize the mode line. This is modified -version `powerline-nano-theme`. This is what it looks like: - -![img](./powerline.png) - -```lisp -(setq-default - mode-line-format - '("%e" - (:eval - (let* ((active (powerline-selected-window-active)) - ;; left hand side displays Read only or Modified. - (lhs (list (powerline-raw - (cond (buffer-read-only "Read only") - ((buffer-modified-p) "Modified") - (t "")) nil 'l))) - ;; right side hand displays (line,column). - (rhs (list - (powerline-raw - (concat - "(" (number-to-string (line-number-at-pos)) - "," (number-to-string (current-column)) ")") nil 'r))) - ;; center displays buffer name. - (center (list (powerline-raw "%b" nil)))) - (concat (powerline-render lhs) - (powerline-fill-center nil (/ (powerline-width center) 2.0)) - (powerline-render center) - (powerline-fill nil (powerline-width rhs)) - (powerline-render rhs)))))) -``` - -## Ido - -Interactive do (or `ido-mode`) changes the way you switch buffers and -open files/directories. Instead of writing complete file paths and buffer -names you can write a part of it and select one from a list of -possibilities. Using `ido-vertical-mode` changes the way possibilities -are displayed, and `flx-ido-mode` enables fuzzy matching. - -```lisp -(dolist (mode - '(ido-mode ; Interactivly do. - ido-everywhere ; Use Ido for all buffer/file reading. - ido-vertical-mode ; Makes ido-mode display vertically. - flx-ido-mode)) ; Toggle flx ido mode. - (funcall mode 1)) -``` - -We can set the order of file selections in `ido`. I prioritize source -files along with `org`- and `tex`-files. - -```lisp -(setq ido-file-extensions-order - '(".el" ".scm" ".lisp" ".java" ".c" ".h" ".org" ".tex")) -``` - -Sometimes when using `ido-switch-buffer` the `*Messages*` buffer get in -the way, so we set it to be ignored (it can be accessed using `C-h e`, so -there is really no need for it in the buffer list). - -```lisp -(add-to-list 'ido-ignore-buffers "*Messages*") -``` - -To make `M-x` behave more like `ido-mode` we can use the `smex` -package. It needs to be initialized, and we can replace the binding to -the standard `execute-extended-command` with `smex`. - -```lisp -(smex-initialize) -(global-set-key (kbd "M-x") 'smex) -``` - -## Calendar - -Define a function to display week numbers in `calender-mode`. The snippet -is from [EmacsWiki](http://www.emacswiki.org/emacs/CalendarWeekNumbers). - -```lisp -(defun calendar-show-week (arg) - "Displaying week number in calendar-mode." - (interactive "P") - (copy-face font-lock-constant-face 'calendar-iso-week-face) - (set-face-attribute - 'calendar-iso-week-face nil :height 0.7) - (setq calendar-intermonth-text - (and arg - '(propertize - (format - "%2d" - (car (calendar-iso-from-absolute - (calendar-absolute-from-gregorian - (list month day year))))) - 'font-lock-face 'calendar-iso-week-face)))) -``` - -Evaluate the `calendar-show-week` function. - -```lisp -(calendar-show-week t) -``` - -Set Monday as the first day of the week, and set my location. - -```lisp -(setq calendar-week-start-day 1 - calendar-latitude 60.0 - calendar-longitude 10.7 - calendar-location-name "Oslo, Norway") -``` - -## Mail - -I use [mu4e](http://www.djcbsoftware.nl/code/mu/mu4e.html) (which is a part of [mu](http://www.djcbsoftware.nl/code/mu/)) along with [offlineimap](http://docs.offlineimap.org/en/latest/) on one of my -computers. Because the mail-setup wont work without these programs -installed we bind `load-mail-setup` to `nil`. If the value is changed to -a `non-nil` value mail is setup. - -```lisp -(defvar load-mail-setup nil) - -(when load-mail-setup - ;; We need mu4e - (require 'mu4e) - - ;; Some basic mu4e settings. - (setq mu4e-maildir "~/.ifimail" ; top-level Maildir - mu4e-sent-folder "/INBOX.Sent" ; folder for sent messages - mu4e-drafts-folder "/INBOX.Drafts" ; unfinished messages - mu4e-trash-folder "/INBOX.Trash" ; trashed messages - mu4e-refile-folder "/INBOX.Archive" ; saved messages - mu4e-get-mail-command "offlineimap" ; offlineimap to fetch mail - mu4e-compose-signature "- Lars" ; Sign my name - mu4e-update-interval (* 5 60) ; update every 5 min - mu4e-confirm-quit nil ; just quit - mu4e-view-show-images t ; view images - mu4e-html2text-command - "html2text -utf8") ; use utf-8 - - ;; Setup for sending mail. - (setq user-full-name - "Lars Tveito" ; Your full name - user-mail-address - "larstvei@ifi.uio.no" ; And email-address - smtpmail-smtp-server - "smtp.uio.no" ; Host to mail-server - smtpmail-smtp-service 465 ; Port to mail-server - smtpmail-stream-type 'ssl ; Protocol used for sending - send-mail-function 'smtpmail-send-it ; Use smpt to send - mail-user-agent 'mu4e-user-agent) ; Use mu4e! - - ;; Register file types that can be handled by ImageMagick. - (when (fboundp 'imagemagick-register-types) - (imagemagick-register-types)) - - (defadvice mu4e (before show-mu4e (arg) activate) - "Always show mu4e in fullscreen and remember window -configuration." - (unless arg - (window-configuration-to-register :mu4e-fullscreen) - (mu4e-update-mail-and-index t) - (delete-other-windows))) - - (defadvice mu4e-quit (after restore-windows nil activate) - "Restore window configuration." - (jump-to-register :mu4e-fullscreen)) - - ;; Overwrite the native 'compose-mail' binding to 'show-mu4e'. - (global-set-key (kbd "C-x m") 'mu4e)) -``` - -## Flyspell - -Flyspell offers on-the-fly spell checking. We can enable flyspell for all -text-modes with this snippet. - -```lisp -(add-hook 'text-mode-hook 'turn-on-flyspell) -``` - -To use flyspell for programming there is `flyspell-prog-mode`, that only -enables spell checking for comments and strings. We can enable it for all -programming modes using the `prog-mode-hook`. Flyspell interferes with -auto-complete mode, but there is a workaround provided by auto complete. - -```lisp -(add-hook 'prog-mode-hook 'flyspell-prog-mode) -(ac-flyspell-workaround) -``` - -To cycle through dictionary's we can define a variable containing a -cyclic list of installed language packs. - -```lisp -(defvar ispell-languages '#1=("english" "norsk" . #1#)) -``` - -Now we only need a small function to change set the language and shift -the list. - -```lisp -(defun cycle-languages () - "Changes the ispell-dictionary to whatever is the next (or cdr) in the -LANGUAGES (cyclic) list." - (interactive) - (ispell-change-dictionary - (car (setq ispell-languages (cdr ispell-languages))))) -``` - -## Org - -I use `org-agenda` for appointments and such. - -```lisp -(setq org-agenda-start-on-weekday nil ; Show agenda from today. - org-agenda-files '("~/Dropbox/life.org") ; A list of agenda files. - org-agenda-default-appointment-duration 120) ; 2 hours appointments. -``` - -When editing org-files with source-blocks, we want the source blocks to -be themed as they would in their native mode. - -```lisp -(setq org-src-fontify-natively t) -``` - -## Interactive functions - - - -To search recent files useing `ido-mode` we add this snippet from -[EmacsWiki](http://www.emacswiki.org/emacs/CalendarWeekNumbers). - -```lisp -(defun recentf-ido-find-file () - "Find a recent file using Ido." - (interactive) - (let ((f (ido-completing-read "Choose recent file: " recentf-list nil t))) - (when f - (find-file f)))) -``` - -`just-one-space` removes all whitespace around a point - giving it a -negative argument it removes newlines as well. We wrap a interactive -function around it to be able to bind it to a key. - -```lisp -(defun remove-whitespace-inbetween () - "Removes whitespace before and after the point." - (interactive) - (just-one-space -1)) -``` - -This interactive function switches you to a `shell`, and if triggered in -the shell it switches back to the previous buffer. - -```lisp -(defun switch-to-shell () - "Jumps to eshell or back." - (interactive) - (if (string= (buffer-name) "*shell*") - (switch-to-prev-buffer) - (shell))) -``` - -To duplicate either selected text or a line we define this interactive -function. - -```lisp -(defun duplicate-thing () - "Ethier duplicates the line or the region" - (interactive) - (save-excursion - (let ((start (if (region-active-p) (region-beginning) (point-at-bol))) - (end (if (region-active-p) (region-end) (point-at-eol)))) - (goto-char end) - (unless (region-active-p) - (newline)) - (insert (buffer-substring start end))))) -``` - -To tidy up a buffer we define this function borrowed from [simenheg](https://github.com/simenheg). - -```lisp -(defun tidy () - "Ident, untabify and unwhitespacify current buffer, or region if active." - (interactive) - (let ((beg (if (region-active-p) (region-beginning) (point-min))) - (end (if (region-active-p) (region-end) (point-max)))) - (indent-region beg end) - (whitespace-cleanup) - (untabify beg (if (< end (point-max)) end (point-max))))) -``` - -## Key bindings - -Bindings for [expand-region](https://github.com/magnars/expand-region.el). - -```lisp -(global-set-key (kbd "C-'") 'er/expand-region) -(global-set-key (kbd "C-;") 'er/contract-region) -``` - -Bindings for [multiple-cursors](https://github.com/magnars/multiple-cursors.el). - -```lisp -(global-set-key (kbd "C-c e") 'mc/edit-lines) -(global-set-key (kbd "C-c a") 'mc/mark-all-like-this) -(global-set-key (kbd "C-c n") 'mc/mark-next-like-this) -``` - -Bindings for [Magit](http://magit.github.io). - -```lisp -(global-set-key (kbd "C-c m") 'magit-status) -``` - -Bindings for [ace-jump-mode](https://github.com/winterTTr/ace-jump-mode). - -```lisp -(global-set-key (kbd "C-c SPC") 'ace-jump-mode) -``` - -Bindings for `move-text`. - -```lisp -(global-set-key (kbd "") 'move-text-up) -(global-set-key (kbd "") 'move-text-down) -``` - -Bind some native Emacs functions. - -```lisp -(global-set-key (kbd "C-c s") 'ispell-word) -(global-set-key (kbd "C-c t") 'org-agenda-list) -(global-set-key (kbd "C-x k") 'kill-this-buffer) -(global-set-key (kbd "C-x C-r") 'recentf-ido-find-file) -``` - -Bind the functions defined above. - -```lisp -(global-set-key (kbd "C-c l") 'cycle-languages) -(global-set-key (kbd "C-c j") 'remove-whitespace-inbetween) -(global-set-key (kbd "C-x t") 'switch-to-shell) -(global-set-key (kbd "C-c d") 'duplicate-thing) -(global-set-key (kbd "") 'tidy) -``` - -## Advice - -An advice can be given to a function to make it behave differently. This -advice makes `eval-last-sexp` (bound to `C-x C-e`) replace the sexp with -the value. - -```lisp -(defadvice eval-last-sexp (around replace-sexp (arg) activate) - "Replace sexp when called with a prefix argument." - (if arg - (let ((pos (point))) - ad-do-it - (goto-char pos) - (backward-kill-sexp) - (forward-sexp)) - ad-do-it)) -``` - -`Flyspell` signals an error if there is no spell-checking tool is -installed. We can advice `turn-on=flyspell` and `flyspell-prog-mode` to -only try to enable `flyspell` if a spell-checking tool is avalible. - -```lisp -(defadvice turn-on-flyspell (around check nil activate) - "Turns on flyspell only if a spell-checking tool is installed." - (when (executable-find ispell-program-name) - ad-do-it)) -``` - -```lisp -(defadvice flyspell-prog-mode (around check nil activate) - "Turns on flyspell only if a spell-checking tool is installed." - (when (executable-find ispell-program-name) - ad-do-it)) -``` - -# Language mode specific - -## Lisp - -`Pretty-lambda` provides a customizable variable -`pretty-lambda-auto-modes` that is a list of common lisp modes. Here we -can add some extra lisp-modes. We run the `pretty-lambda-for-modes` -function to activate `pretty-lambda-mode` in lisp modes. - -```lisp -(dolist (mode '(slime-repl-mode geiser-repl-mode)) - (add-to-list 'pretty-lambda-auto-modes mode)) - -(pretty-lambda-for-modes) -``` - -I use `Paredit` when editing lisp code, we enable this for all lisp-modes -in the `pretty-lambda-auto-modes` list. - -```lisp -(dolist (mode pretty-lambda-auto-modes) - ;; add paredit-mode to all mode-hooks - (add-hook (intern (concat (symbol-name mode) "-hook")) 'paredit-mode)) -``` - -### Emacs Lisp - -In `emacs-lisp-mode` we can enable `eldoc-mode` to display information -about a function or a variable in the echo area. - -```lisp -(add-hook 'emacs-lisp-mode-hook 'turn-on-eldoc-mode) -(add-hook 'lisp-interaction-mode-hook 'turn-on-eldoc-mode) -``` - -### Common lisp - -I use [Slime](http://www.common-lisp.net/project/slime/) along with `lisp-mode` to edit Common Lisp code. Slime -provides code evaluation and other great features, a must have for a -Common Lisp developer. [Quicklisp](http://www.quicklisp.org/beta/) is a library manager for Common Lisp, -and you can install Slime following the instructions from the site along -with this snippet. - -```lisp -(when (file-exists-p "~/quicklisp/slime-helper.elc") - (load (expand-file-name "~/quicklisp/slime-helper.elc"))) -``` - -We can specify what Common Lisp program Slime should use (I use SBCL). - -```lisp -(setq inferior-lisp-program "sbcl") -``` - -To improve auto completion for Common Lisp editing we can use `ac-slime` -which uses slime completions as a source. - -```lisp -(add-hook 'slime-mode-hook 'set-up-slime-ac) -(add-hook 'slime-repl-mode-hook 'set-up-slime-ac) - -(eval-after-load "auto-complete" - '(add-to-list 'ac-modes 'slime-repl-mode)) -``` - -### Scheme - -[Geiser](http://www.nongnu.org/geiser/) provides features similar to Slime for Scheme editing. Everything -works pretty much out of the box, we only need to add auto completion, -and specify which scheme-interpreter we prefer. - -```lisp -(add-hook 'geiser-mode-hook 'ac-geiser-setup) -(add-hook 'geiser-repl-mode-hook 'ac-geiser-setup) -(eval-after-load "auto-complete" - '(add-to-list 'ac-modes 'geiser-repl-mode)) -(setq geiser-active-implementations '(racket)) -``` - -## Java and C - -The `c-mode-common-hook` is a general hook that work on all C-like -languages (C, C++, Java, etc…). I like being able to quickly compile -using `C-c C-c` (instead of `M-x compile`), a habit from `latex-mode`. - -```lisp -(defun c-setup () - (local-set-key (kbd "C-c C-c") 'compile)) - -(require 'auto-complete-c-headers) -(add-to-list 'ac-sources 'ac-source-c-headers) - -(add-hook 'c-mode-common-hook 'c-setup) -``` - -Some statements in Java appear often, and become tedious to write -out. We can use abbrevs to speed this up. - -```lisp -(define-abbrev-table 'java-mode-abbrev-table - '(("psv" "public static void main(String[] args) {" nil 0) - ("sopl" "System.out.println" nil 0) - ("sop" "System.out.printf" nil 0))) -``` - -To be able to use the abbrev table defined above, `abbrev-mode` must be -activated. - -```lisp -(defun java-setup () - (abbrev-mode t) - (setq-local compile-command (concat "javac " (buffer-name)))) - -(add-hook 'java-mode-hook 'java-setup) -``` - -## Assembler - -When writing assembler code I use `#` for comments. By defining -`comment-start` we can add comments using `M-;` like in other programming -modes. Also in assembler should one be able to compile using `C-c C-c`. - -```lisp -(defun asm-setup () - (setq comment-start "#") - (local-set-key (kbd "C-c C-c") 'compile)) - -(add-hook 'asm-mode-hook 'asm-setup) -``` - -## LaTeX - -`.tex`-files should be associated with `latex-mode` instead of -`tex-mode`. - -```lisp -(add-to-list 'auto-mode-alist '("\\.tex\\'" . latex-mode)) -``` - -I like using the [Minted](https://code.google.com/p/minted/) package for source blocks in LaTeX. To make org -use this we add the following snippet. - -```lisp -(add-to-list 'org-latex-packages-alist '("" "minted")) -(setq org-latex-listings 'minted) -``` - -Because [Minted](https://code.google.com/p/minted/) uses [Pygments](http://pygments.org) (an external process), we must add the -`-shell-escape` option to the `org-latex-pdf-process` commands. The -`tex-compile-commands` variable controls the default compile command for -Tex- and LaTeX-mode, we can add the flag with a rather dirty statement -(if anyone finds a nicer way to do this, please let me know). - -```lisp -(setq org-latex-pdf-process - (mapcar - (lambda (str) - (concat "pdflatex -shell-escape " - (substring str (string-match "-" str)))) - org-latex-pdf-process)) - -(setcar (cdr (cddaar tex-compile-commands)) " -shell-escape ") -``` - -## Python - -[Jedi](http://tkf.github.io/emacs-jedi/released/) offers very nice auto completion for `python-mode`. Mind that it is -dependent on some python programs as well, so make sure you follow the -instructions from the site. - -```lisp -;; (setq jedi:server-command -;; (cons "python3" (cdr jedi:server-command)) -;; python-shell-interpreter "python3") -(add-hook 'python-mode-hook 'jedi:setup) -(setq jedi:complete-on-dot t) -(add-hook 'python-mode-hook 'jedi:ac-setup) -``` - -## Haskell - -`haskell-doc-mode` is similar to `eldoc`, it displays documentation in -the echo area. Haskell has several indentation modes - I prefer using -`haskell-indent`. - -```lisp -(add-hook 'haskell-mode-hook 'turn-on-haskell-doc-mode) -(add-hook 'haskell-mode-hook 'turn-on-haskell-indent) -``` - -## Matlab - -Matlab is very similar to Octave, which is supported by Emacs. We just -need to let `.m`-files be associated with `octave-mode`. - -```lisp -(add-to-list 'matlab-shell-command-switches "-nosplash") -```