diff --git a/README.md b/README.md deleted file mode 100644 index c6d9785..0000000 --- a/README.md +++ /dev/null @@ -1,1280 +0,0 @@ -- [About](#sec-1) -- [Configurations](#sec-2) - - [Meta](#sec-2-1) - - [Package](#sec-2-2) - - [Mac OS X](#sec-2-3) - - [Require](#sec-2-4) - - [Sane defaults](#sec-2-5) - - [Modes](#sec-2-6) - - [Visual](#sec-2-7) - - [Ido](#sec-2-8) - - [Calendar](#sec-2-9) - - [Mail](#sec-2-10) - - [Flyspell](#sec-2-11) - - [Org](#sec-2-12) - - [Interactive functions](#sec-2-13) - - [Advice](#sec-2-14) - - [Presentation-mode](#sec-2-15) -- [Mode specific](#sec-3) - - [Shell](#sec-3-1) - - [Lisp](#sec-3-2) - - [Emacs Lisp](#sec-3-2-1) - - [Common lisp](#sec-3-2-2) - - [Scheme](#sec-3-2-3) - - [Java and C](#sec-3-3) - - [Assembler](#sec-3-4) - - [LaTeX](#sec-3-5) - - [Markdown](#sec-3-6) - - [Python](#sec-3-7) - - [Haskell](#sec-3-8) - - [Matlab](#sec-3-9) -- [Key bindings](#sec-4) -- [License](#sec-5) - - -# About - -This is an Emacs configuration file written in [Org mode](http://orgmode.org). It is an attempt -to keep my `~/.emacs.d` tidy, but still be able to keep it all in one -file. I aim to briefly explain all my configurations as I go along! - -I would not recommend using this configuration *as-is*, because it -probably contains a lot you don't really need. I do, however, hope people -find some golden nuggets that they can smuggle into their own configs. - -If you really do want to try this config out, this is how I'd go about it: - -**Clone the repo.** - -```sh -git clone https://github.com/larstvei/dot-emacs -``` - -**Backup your old `~/.emacs.d` (if necessary).** - -```sh -mv ~/.emacs.d ~/.emacs.d-bak -``` - -**Backup your old `~/.emacs`-file (if necessary).** - -```sh -mv ~/.emacs ~/.emacs-bak -``` - -**And finally** - -```sh -mv dot-emacs ~/.emacs.d -``` - -On first run it should install a bunch of packages (this might take a -while), and you might have to restart your Emacs the first time. If you -experience bugs, please let me know! - -# 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. - -```emacs-lisp -(defun tangle-init () - "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"))) - ;; Avoid running hooks when tangling. - (let ((prog-mode-hook nil)) - (org-babel-tangle) - (byte-compile-file (concat user-emacs-directory "init.el"))))) - -(add-hook 'after-save-hook 'tangle-init) -``` - -I'd like to keep a few settings private, so we load a `private.el` if it -exists after the init-file has loaded. - -```emacs-lisp -(add-hook - 'after-init-hook - (lambda () - (let ((private-file (concat user-emacs-directory "private.el"))) - (when (file-exists-p private-file) - (load-file private-file))))) -``` - -## 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`. `cl` is a library that contains many functions from -Common Lisp, and comes in handy quite often, so we want to make sure it's -loaded, along with `package`, which is obviously needed. - -```emacs-lisp -(require 'cl) -(require 'package) -(setq package-enable-at-startup nil) -(package-initialize) -``` - -Packages can be fetched from different mirrors, [melpa](http://melpa.milkbox.net/#/) is the largest -archive and is well maintained. - -```emacs-lisp -(setq package-archives - '(("gnu" . "http://elpa.gnu.org/packages/") - ("org" . "http://orgmode.org/elpa/") - ("MELPA" . "http://melpa.milkbox.net/packages/"))) -``` - -We can define a predicate that tells us whether or not the newest version -of a package is installed. - -```emacs-lisp -(defun newest-package-installed-p (package) - "Return true if the newest available PACKAGE is installed." - (when (package-installed-p package) - (let* ((get-desc (if (version< emacs-version "24.4") 'cdr 'cadr)) - (builtin-version (assq package package--builtin-versions)) - (local-pkg-desc (assq package package-alist)) - (newest-pkg-desc (assq package package-archive-contents))) - (cond ((and local-pkg-desc newest-pkg-desc) - (version-list-= (package-desc-version - (funcall get-desc local-pkg-desc)) - (package-desc-version - (funcall get-desc newest-pkg-desc)))) - ((and builtin-version newest-pkg-desc) - (version-list-= builtin-version - (package-desc-version - (funcall get-desc 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. - -```emacs-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 - (if (version< emacs-version "24.4") - (package-delete (symbol-name package) - (package-version-join - (package-desc-vers (cdr pkg-desc)))) - (package-delete pkg-desc))) - (and (assq package package-archive-contents) - (package-install package))))) -``` - -Also, we will need a function to find all dependencies from a given package. - -```emacs-lisp -(defun dependencies (package) - "Returns a list of dependencies from a given PACKAGE." - (let* ((pkg-desc (assq package package-alist)) - (reqs (and pkg-desc (package-desc-reqs (cdr pkg-desc))))) - (mapcar 'car reqs))) -``` - -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 whether 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. - -```emacs-lisp -(defvar days-between-updates 7) -(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 packages were last 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 whether or not to do an update. After that we -must run the `time-stamp`-function to update the time-stamp. - -```emacs-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). - -```emacs-lisp -(when (and do-package-update-on-init - (y-or-n-p "Update all packages?")) - (package-refresh-contents) - (let* ((packages - '(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 - centered-window ; Center the text when there's only one window - elscreen ; window session manager - expand-region ; Increase selected region by semantic units - flx-ido ; flx integration for ido - idle-require ; load elisp libraries while Emacs is idle - 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 - js2-mode ; Improved JavaScript editing mode - 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. - slime ; Superior Lisp Interaction Mode for Emacs - smex ; M-x interface with Ido-style fuzzy matching. - undo-tree ; Treat undo history as a tree - try)) ; Try out Emacs packages. - ;; Fetch dependencies from all packages. - (reqs (mapcar 'dependencies packages)) - ;; Append these to the original list, and remove any duplicates. - (packages (delete-dups (apply 'append packages reqs)))) - - (dolist (package packages) - (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)) - (package-initialize)) -``` - -## 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. - -```emacs-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). `require`-calls -tends to lead to the largest bottleneck's in a -configuration. `idle-require` delays the `require`-calls to a time where -Emacs is in idle. So this is great for stuff you eventually want to load, -but is not a high priority. - -```emacs-lisp -(require 'idle-require) ; Need in order to use idle-require -(require 'auto-complete-config) ; a configuration for auto-complete-mode - -(dolist (feature - '(auto-compile ; auto-compile .el files - 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 - smex ; M-x interface Ido-style. - tex-mode)) ; TeX, LaTeX, and SliTeX mode commands - (idle-require feature)) - -(setq idle-require-idle-delay 5) -(idle-require-mode 1) -``` - -## Sane defaults - -These are what *I* consider to be saner defaults. - -We can set variables to whatever value we'd like using `setq`. - -```emacs-lisp -(setq default-input-method "TeX" ; Use TeX when toggling input method. - doc-view-continuous t ; At page edge goto next/previous. - echo-keystrokes 0.1 ; Show keystrokes asap. - inhibit-startup-message t ; No splash screen please. - initial-scratch-message nil ; Clean scratch buffer. - ring-bell-function 'ignore ; Quiet. - ;; Save undo history between sessions, if you have an undo-dir - undo-tree-auto-save-history - (file-exists-p - (concat user-emacs-directory "undo")) - undo-tree-history-directory-alist - ;; Put undo-history files in a directory, if it exists. - (let ((undo-dir (concat user-emacs-directory "undo"))) - (and (file-exists-p undo-dir) - (list (cons "." undo-dir))))) - -;; 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. - -```emacs-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). - -```emacs-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. - -```emacs-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. - -```emacs-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. - -```emacs-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. - -```emacs-lisp -(put 'narrow-to-region 'disabled nil) -``` - -Call `auto-complete` default configuration, which enables `auto-complete` -globally. - -```emacs-lisp -(eval-after-load 'auto-complete-config `(ac-config-default)) -``` - -Automaticly revert `doc-view`-buffers when the file changes on disk. - -```emacs-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. - -```emacs-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. - -```emacs-lisp -(dolist (mode - '(abbrev-mode ; E.g. sopl -> System.out.println. - column-number-mode ; Show column number in mode line. - delete-selection-mode ; Replace selected text. - dirtrack-mode ; directory tracking in *shell* - recentf-mode ; Recently opened files. - show-paren-mode ; Highlight matching parentheses. - global-undo-tree-mode)) ; Undo as a tree. - (funcall mode 1)) - -(when (version< emacs-version "24.4") - (eval-after-load 'auto-compile - '((auto-compile-on-save-mode 1)))) ; compile .el files on save. -``` - -This makes `.md`-files open in `markdown-mode`. - -```emacs-lisp -(add-to-list 'auto-mode-alist '("\\.md\\'" . markdown-mode)) -``` - -## Visual - -Change the color-theme to `leuven`. - -```emacs-lisp -(load-theme 'leuven t) -``` - -`leuven` is my preferred light theme, but `monokai` makes a very nice -dark theme. I want to be able to cycle between these. - -```emacs-lisp -(defun cycle-themes () - "Returns a function that lets you cycle your themes." - (lexical-let ((themes '#1=(leuven monokai . #1#))) - (lambda () - (interactive) - ;; Rotates the thme cycle and changes the current theme. - (load-theme (car (setq themes (cdr themes))) t)))) -``` - -Use the [Inconsolata](http://www.levien.com/type/myfonts/inconsolata.html) font if it's installed on the system. - -```emacs-lisp -(when (member "Inconsolata" (font-family-list)) - (set-face-attribute 'default nil :font "Inconsolata-13")) -``` - -## 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. - -```emacs-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. - -```emacs-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). - -```emacs-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`. - -```emacs-lisp -(smex-initialize) -``` - -## Calendar - -Define a function to display week numbers in `calender-mode`. The snippet -is from [EmacsWiki](http://www.emacswiki.org/emacs/CalendarWeekNumbers). - -```emacs-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. - -```emacs-lisp -(calendar-show-week t) -``` - -Set Monday as the first day of the week, and set my location. - -```emacs-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. - -```emacs-lisp -(defvar load-mail-setup nil) - -(when load-mail-setup - (eval-after-load 'mu4e - '(progn - ;; 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)))) - (autoload 'mu4e "mu4e" nil t) - (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. - -```emacs-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. - -```emacs-lisp -(add-hook 'prog-mode-hook 'flyspell-prog-mode) -(eval-after-load 'auto-complete - '(ac-flyspell-workaround)) -``` - -When working with several languages, we should be able to cycle through -the languages we most frequently use. Every buffer should have a separate -cycle of languages, so that cycling in one buffer does not change the -state in a different buffer (this problem occurs if you only have one -global cycle). We can implement this by using a [closure](http://www.gnu.org/software/emacs/manual/html_node/elisp/Closures.html). - -```emacs-lisp -(defun cycle-languages () - "Changes the ispell dictionary to the first element in -ISPELL-LANGUAGES, and returns an interactive function that cycles -the languages in ISPELL-LANGUAGES when invoked." - (lexical-let ((ispell-languages '#1=("american" "norsk" . #1#))) - (ispell-change-dictionary (car ispell-languages)) - (lambda () - (interactive) - ;; Rotates the languages cycle and changes the ispell dictionary. - (ispell-change-dictionary - (car (setq ispell-languages (cdr ispell-languages))))))) -``` - -`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 available. Also -we want to enable cycling the languages by typing `C-c l`, so we bind the -function returned from `cycle-languages`. - -```emacs-lisp -(defadvice turn-on-flyspell (before check nil activate) - "Turns on flyspell only if a spell-checking tool is installed." - (when (executable-find ispell-program-name) - (local-set-key (kbd "C-c l") (cycle-languages)))) -``` - -```emacs-lisp -(defadvice flyspell-prog-mode (before check nil activate) - "Turns on flyspell only if a spell-checking tool is installed." - (when (executable-find ispell-program-name) - (local-set-key (kbd "C-c l") (cycle-languages)))) -``` - -## Org - -I use `org-agenda` for appointments and such. - -```emacs-lisp -(setq org-agenda-start-on-weekday nil ; Show agenda from today. - org-agenda-files '("~/Dropbox/cal.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. - -```emacs-lisp -(setq org-src-fontify-natively t - org-confirm-babel-evaluate nil) -``` - -This is quite an ugly fix for allowing code markup for expressions like -`"this string"`, because the quotation marks causes problems. - -```emacs-lisp -;;(require 'org) -(eval-after-load "org" - '(progn - (setcar (nthcdr 2 org-emphasis-regexp-components) " \t\n,") - (custom-set-variables `(org-emphasis-alist ',org-emphasis-alist)))) -``` - -## Interactive functions - - - -To search recent files useing `ido-mode` we add this snippet from -[EmacsWiki](http://www.emacswiki.org/emacs/CalendarWeekNumbers). - -```emacs-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. In Emacs 24.4 -`cycle-spacing` was introduced, and it works like just one space, but -when run in succession it cycles between one, zero and the original -number of spaces. - -```emacs-lisp -(defun cycle-spacing-delete-newlines () - "Removes whitespace before and after the point." - (interactive) - (if (version< emacs-version "24.4") - (just-one-space -1) - (cycle-spacing -1))) -``` - -Often I want to find other occurrences of a word I'm at, or more -specifically the symbol (or tag) I'm at. The -`isearch-forward-symbol-at-point` in Emacs 24.4 works well for this, but -I don't want to be bothered with the `isearch` interface. Rather jump -quickly between occurrences of a symbol, or if non is found, don't do -anything. - -```emacs-lisp -(defun jump-to-symbol-internal (&optional backwardp) - "Jumps to the next symbol near the point if such a symbol -exists. If BACKWARDP is non-nil it jumps backward." - (let* ((point (point)) - (bounds (find-tag-default-bounds)) - (beg (car bounds)) (end (cdr bounds)) - (str (isearch-symbol-regexp (find-tag-default))) - (search (if backwardp 'search-backward-regexp - 'search-forward-regexp))) - (goto-char (if backwardp beg end)) - (funcall search str nil t) - (cond ((<= beg (point) end) (goto-char point)) - (backwardp (forward-char (- point beg))) - (t (backward-char (- end point)))))) - -(defun jump-to-previous-like-this () - "Jumps to the previous occurrence of the symbol at point." - (interactive) - (jump-to-symbol-internal t)) - -(defun jump-to-next-like-this () - "Jumps to the next occurrence of the symbol at point." - (interactive) - (jump-to-symbol-internal)) -``` - -I sometimes regret killing the `*scratch*`-buffer, and have realized I -never want to actually kill it. I just want to get it out of the way, and -clean it up. The function below does just this for the -`*scratch*`-buffer, and works like `kill-this-buffer` for any other -buffer. It removes all buffer content and buries the buffer (this means -making it the least likely candidate for `other-buffer`). - -```emacs-lisp -(defun kill-this-buffer-unless-scratch () - "Works like `kill-this-buffer' unless the current buffer is the -*scratch* buffer. In witch case the buffer content is deleted and -the buffer is buried." - (interactive) - (if (not (string= (buffer-name) "*scratch*")) - (kill-this-buffer) - (delete-region (point-min) (point-max)) - (switch-to-buffer (other-buffer)) - (bury-buffer "*scratch*"))) -``` - -To duplicate either selected text or a line we define this interactive -function. - -```emacs-lisp -(defun duplicate-thing () - "Duplicates the current line, or the region if active." - (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). - -```emacs-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))))) -``` - -## 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. - -```emacs-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)) -``` - -When interactively changing the theme (using `M-x load-theme`), the -current custom theme is not disabled. This often gives weird-looking -results; we can advice `load-theme` to always disable themes currently -enabled themes. - -```emacs-lisp -(defadvice load-theme - (before disable-before-load (theme &optional no-confirm no-enable) activate) - (mapc 'disable-theme custom-enabled-themes)) -``` - -## Presentation-mode - -When giving talks it's nice to be able to scale the text -globally. `text-scale-mode` works great for a single buffer, this advice -makes this work globally. - -```emacs-lisp -(defadvice text-scale-mode (around all-buffers (arg) activate) - (if (not global-text-scale-mode) - ad-do-it - (setq-default text-scale-mode-amount text-scale-mode-amount) - (dolist (buffer (buffer-list)) - (with-current-buffer buffer - ad-do-it)))) -``` - -We don't want this to be default behavior, so we can make a global mode -from the `text-scale-mode`, using `define-globalized-minor-mode`. - -```emacs-lisp -(require 'face-remap) - -(define-globalized-minor-mode - global-text-scale-mode - text-scale-mode - (lambda () (text-scale-mode 1))) -``` - -# Mode specific - -## Shell - -I use `shell` whenever i want to use access the command line in Emacs. I -keep a symlink between my `~/.bash_profile` (because I run OS X) and -`~/.emacs_bash`, to make the transition between my standard terminal and -the shell as small as possible. To be able to quickly switch back and -forth between a shell I make use of this little function. - -```emacs-lisp -(defun toggle-shell () - "Jumps to eshell or back." - (interactive) - (if (string= (buffer-name) "*shell*") - (switch-to-prev-buffer) - (shell))) -``` - -I'd like the `C-l` to work more like the standard terminal (which works -like running `clear`), and resolve this by simply removing the -buffer-content. Mind that this is not how `clear` works, it simply adds a -bunch of newlines, and puts the prompt at the top of the window, so it -does not remove anything. In Emacs removing stuff is less of a worry, -since we can always undo! - -```emacs-lisp -(defun clear-comint () - "Runs `comint-truncate-buffer' with the -`comint-buffer-maximum-size' set to zero." - (interactive) - (let ((comint-buffer-maximum-size 0)) - (comint-truncate-buffer))) -``` - -Lastly we should bind our functions. The `toggle-shell` should be a -global binding (because we want to be able to switch to a shell from any -buffer), but the `clear-shell` should only affect `shell-mode`. - -```emacs-lisp -(add-hook 'comint-mode-hook (lambda () (local-set-key (kbd "C-l") 'clear-comint))) -``` - -## 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. - -```emacs-lisp -(dolist (mode '(slime-repl-mode geiser-repl-mode ielm-mode clojure-mode - cider-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. - -```emacs-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. - -```emacs-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. - -```emacs-lisp -(defun activate-slime-helper () - (when (file-exists-p "~/.quicklisp/slime-helper.elc") - (load (expand-file-name "~/.quicklisp/slime-helper.elc")) - (define-key slime-repl-mode-map (kbd "C-l") - 'slime-repl-clear-buffer)) - (remove-hook 'lisp-mode-hook #'activate-slime-helper)) - -(add-hook 'lisp-mode-hook #'activate-slime-helper) -``` - -We can specify what Common Lisp program Slime should use (I use SBCL). - -```emacs-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. - -```emacs-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)) -``` - -More sensible `loop` indentation, borrowed from [simenheg](https://github.com/simenheg). - -```emacs-lisp -(setq lisp-loop-forms-indentation 6 - lisp-simple-loop-indentation 2 - lisp-loop-keyword-indentation 6) -``` - -```emacs-lisp -``` - -### 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. - -```emacs-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)) -(eval-after-load "geiser" - '(add-to-list 'geiser-active-implementations 'plt-r5rs)) ;'(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`. - -```emacs-lisp -(defun c-setup () - (local-set-key (kbd "C-c C-c") 'compile)) - -(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. - -```emacs-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. - -```emacs-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`. - -```emacs-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`. - -```emacs-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. - -```emacs-lisp -(eval-after-load 'org - '(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). - -```emacs-lisp -(eval-after-load 'ox-latex - '(setq org-latex-pdf-process - (mapcar - (lambda (str) - (concat "pdflatex -shell-escape " - (substring str (string-match "-" str)))) - org-latex-pdf-process))) - -(eval-after-load 'tex-mode - '(setcar (cdr (cddaar tex-compile-commands)) " -shell-escape ")) -``` - -## Markdown - -I sometimes use a specialized markdown format, where inline math-blocks -can be achieved by surrounding a LaTeX formula with `$math$` and -`$/math$`. Writing these out became tedious, so I wrote a small function. - -```emacs-lisp -(defun insert-markdown-inline-math-block () - "Inserts an empty math-block if no region is active, otherwise wrap a -math-block around the region." - (interactive) - (let* ((beg (region-beginning)) - (end (region-end)) - (body (if (region-active-p) (buffer-substring beg end) ""))) - (when (region-active-p) - (delete-region beg end)) - (insert (concat "$math$ " body " $/math$")) - (search-backward " $/math$"))) -``` - -Most of my writing in this markup is in Norwegian, so the dictionary is -set accordingly. The markup is also sensitive to line breaks, so -`auto-fill-mode` is disabled. Of course we want to bind our lovely -function to a key! - -```emacs-lisp -(add-hook 'markdown-mode-hook - (lambda () - (auto-fill-mode 0) - (ispell-change-dictionary "norsk") - (local-set-key (kbd "C-c b") 'insert-markdown-inline-math-block)) t) -``` - -## Python - -## 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`. - -```emacs-lisp -(add-hook 'haskell-mode-hook 'turn-on-haskell-doc-mode) -(add-hook 'haskell-mode-hook 'turn-on-haskell-indent) -``` - -## Matlab - -`Matlab-mode` works pretty good out of the box, but we can do without the -splash screen. - -```emacs-lisp -(eval-after-load 'matlab - '(add-to-list 'matlab-shell-command-switches "-nosplash")) -``` - -# Key bindings - -Inspired by [this StackOverflow post](http://stackoverflow.com/questions/683425/globally-override-key-binding-in-emacs) I keep a `custom-bindings-map` that -holds all my custom bindings. This map can be activated by toggling a -simple `minor-mode` that does nothing more than activating the map. This -inhibits other `major-modes` to override these bindings. I keep this at -the end of the init-file to make sure that all functions are actually -defined. - -```emacs-lisp -(defvar custom-bindings-map (make-keymap) - "A keymap for custom bindings.") -``` - -Bindings for [expand-region](https://github.com/magnars/expand-region.el). - -```emacs-lisp -(define-key custom-bindings-map (kbd "C-'") 'er/expand-region) -(define-key custom-bindings-map (kbd "C-\"") 'er/contract-region) -``` - -Bindings for [multiple-cursors](https://github.com/magnars/multiple-cursors.el). - -```emacs-lisp -(define-key custom-bindings-map (kbd "C-c e") 'mc/edit-lines) -(define-key custom-bindings-map (kbd "C-c a") 'mc/mark-all-like-this) -(define-key custom-bindings-map (kbd "C-c n") 'mc/mark-next-like-this) -``` - -Bindings for [Magit](http://magit.github.io). - -```emacs-lisp -(define-key custom-bindings-map (kbd "C-c m") 'magit-status) -``` - -Bindings for [ace-jump-mode](https://github.com/winterTTr/ace-jump-mode). - -```emacs-lisp -(define-key custom-bindings-map (kbd "C-c SPC") 'ace-jump-mode) -``` - -Bindings for [Helm](http://emacs-helm.github.io/helm/). - -```emacs-lisp -(define-key custom-bindings-map (kbd "C-c h g") 'helm-google-suggest) -``` - -Bindings for [smex](https://github.com/nonsequitur/smex). This overrides the standard `M-x`. - -```emacs-lisp -(define-key custom-bindings-map (kbd "M-x") 'smex) -``` - -Bindings for `move-text`. - -```emacs-lisp -(define-key custom-bindings-map (kbd "") 'move-text-up) -(define-key custom-bindings-map (kbd "") 'move-text-down) -``` - -Bind some native Emacs functions. - -```emacs-lisp -(define-key custom-bindings-map (kbd "C-j") 'newline-and-indent) -(define-key custom-bindings-map (kbd "C-c s") 'ispell-word) -(define-key custom-bindings-map (kbd "C-c t") 'org-agenda-list) -(define-key custom-bindings-map (kbd "C-x C-r") 'recentf-ido-find-file) -``` - -Bind the functions defined above. - -```emacs-lisp -(define-key global-map (kbd "M-p") 'jump-to-previous-like-this) -(define-key global-map (kbd "M-n") 'jump-to-next-like-this) -(define-key custom-bindings-map (kbd "M-,") 'jump-to-previous-like-this) -(define-key custom-bindings-map (kbd "M-.") 'jump-to-next-like-this) -(define-key custom-bindings-map (kbd "C-c .") (cycle-themes)) -(define-key custom-bindings-map (kbd "C-x k") 'kill-this-buffer-unless-scratch) -(define-key custom-bindings-map (kbd "C-x t") 'toggle-shell) -(define-key custom-bindings-map (kbd "C-c j") 'cycle-spacing-delete-newlines) -(define-key custom-bindings-map (kbd "C-c d") 'duplicate-thing) -(define-key custom-bindings-map (kbd "") 'tidy) -``` - -Lastly we need to activate the map by creating and activating the -`minor-mode`. - -```emacs-lisp -(define-minor-mode custom-bindings-mode - "A mode that activates custom-bindings." - t nil custom-bindings-map) -``` - -# License - -My Emacs configurations written in Org mode. - -Copyright (c) 2013 - 2014 Lars Tveito - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see . diff --git a/README.org b/README.org new file mode 120000 index 0000000..e909bb4 --- /dev/null +++ b/README.org @@ -0,0 +1 @@ +init.org \ No newline at end of file