48 KiB
Emacs configuration file
About
This is an Emacs configuration file written in Org mode. 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.
git clone https://github.com/larstvei/dot-emacs
Backup your old ~/.emacs.d (if necessary).
mv ~/.emacs.d ~/.emacs.d-bak
Backup your old ~/.emacs-file (if necessary).
mv ~/.emacs ~/.emacs-bakAnd finally
mv dot-emacs ~/.emacs.dOn 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
All changes to the configuration should be done in init.org, not in
init.el. Any changes in the init.el will be overwritten by saving
init.org. The init.el in this repo should not be tracked by git, and
is replaced the first time Emacs is started (assuming it has been renamed
to ~/.emacs.d).
Emacs can't load .org-files directly, but org-mode provides functions
to extract the code blocks and write them to a file. There are multiple
ways of handling this; like suggested by this StackOverflow post, one
could just use org-babel-load-file, but I had problems with
byte-compilation. Previously I tracked both the org.- and el.-files,
but the git commits got a little messy. So here is a new approach.
When this configuration is loaded for the first time, the init.el is
the file that is loaded. It looks like this:
;; This file replaces itself with the actual configuration at first run.
;; We can't tangle without org!
(require 'org)
;; Open the configuration
(find-file (concat user-emacs-directory "init.org"))
;; tangle it
(org-babel-tangle)
;; load it
(load-file (concat user-emacs-directory "init.el"))
;; finally byte-compile it
(byte-compile-file (concat user-emacs-directory "init.el"))It tangles the org-file, so that this file is overwritten with the actual configuration.
There is no reason to track the init.el that is generated; by running
the following command git will not bother tracking it:
git update-index --assume-unchanged init.el
If one wishes to make changes to the repo-version of init.el start
tracking again with:
git update-index --no-assume-unchanged init.el
The init.el should (after the first run) mirror the source blocks in
the init.org. 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.
(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.
(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)))))Packages
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.
(require 'cl)
(require 'package)
(package-initialize)Packages can be fetched from different mirrors, melpa is the largest archive and is well maintained.
(setq package-archives
'(("gnu" . "http://elpa.gnu.org/packages/")
("org" . "http://orgmode.org/elpa/")
("MELPA" . "http://melpa.milkbox.net/packages/")))The configuration assumes that the packages listed below are installed. To ensure we install missing packages if they are missing.
(let* ((packages
'(ace-jump-mode ; quick cursor location minor mode
auto-compile ; automatically compile Emacs Lisp libraries
cider ; Clojure Interactive Development Environment
company ; Modular text completion framework
define-word ; display the definition of word at point
diminish ; Diminished modes from modeline
expand-region ; Increase selected region by semantic units
focus ; Dim color of text in surrounding sections
idle-require ; load elisp libraries while Emacs is idle
geiser ; GNU Emacs and Scheme talk to each other
haskell-mode ; A Haskell editing mode
helm ; Incremental and narrowing framework
helm-company ; Helm interface for company-mode
helm-projectile ; Helm integration for Projectile
helm-swoop ; Efficiently hopping squeezed lines
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.
olivetti ; Minor mode for a nice writing environment
org ; Outline-based notes management and organizer
paredit ; minor mode for editing parentheses
pdf-tools ; Emacs support library for PDF files.
pretty-lambdada ; the word `lambda' as the Greek letter.
projectile ; Manage and navigate projects in Emacs easily
slime ; Superior Lisp Interaction Mode for Emacs
try)) ; Try out Emacs packages
;; Remove all packages already installed
(packages (remove-if 'package-installed-p packages)))
(when packages
(ignore-errors (package-refresh-contents)
(mapcar 'package-install packages)
;; This package is only relevant for Mac OS X.
(when (memq window-system '(mac ns))
(package-install '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 using Emacs
along with external processes a lot simpler. I also prefer using the
Command-key as the Meta-key.
(when (memq window-system '(mac ns))
(setq ns-pop-up-frames nil
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.
(require 'idle-require) ; Need in order to use idle-require
(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
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.
(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.
sentence-end-double-space nil); No double space
;; 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.
(setq-default fill-column 79 ; Maximum line width
truncate-lines t ; Don't fold lines
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).
(let ((default-directory (concat user-emacs-directory "site-lisp/")))
(when (file-exists-p default-directory)
(setq load-path
(append
(let ((load-path (copy-sequence load-path)))
(normal-top-level-add-subdirs-to-load-path)) load-path))))Answering yes and no to each question from Emacs can be tedious, a single y or n will suffice.
(fset 'yes-or-no-p 'y-or-n-p)To avoid file system clutter we put all auto saved files in a single directory.
(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.
(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.
(put 'narrow-to-region 'disabled nil)
Automaticly revert doc-view-buffers when the file changes on disk.
(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.
(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.
(dolist (mode
'(abbrev-mode ; E.g. sopl -> System.out.println
column-number-mode ; Show column number in mode line
global-company-mode ; Auto-completion everywhere
delete-selection-mode ; Replace selected text
dirtrack-mode ; directory tracking in *shell*
recentf-mode ; Recently opened files
show-paren-mode ; Highlight matching parentheses
projectile-global-mode)) ; Manage and navigate projects
(funcall mode 1))
(when (version< emacs-version "24.4")
(eval-after-load 'auto-compile
'((auto-compile-on-save-mode 1)))) ; compile .el files on saveVisual
Change the color-theme to leuven.
(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.
(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 font if it's installed on the system.
(cond ((member "Source Code Pro" (font-family-list))
(set-face-attribute 'default nil :font "Source Code Pro-13"))
((member "Inconsolata" (font-family-list))
(set-face-attribute 'default nil :font "Inconsolata-14")))diminish.el allows you to hide or abbreviate their presence in the modeline. I rarely look at the modeline to find out what minor-modes are enabled, so I disable every global minor-mode, and some for lisp editing.
To ensure that the mode is loaded before diminish it, we should use
with-eval-after-load. To avoid typing this multiple times a small macro
is provided.
(defmacro safe-diminish (file mode &optional new-name)
`(with-eval-after-load ,file
(diminish ,mode ,new-name)))
(diminish 'auto-fill-function)
(safe-diminish "eldoc" 'eldoc-mode)
(safe-diminish "flyspell" 'flyspell-mode)
(safe-diminish "helm-mode" 'helm-mode)
(safe-diminish "projectile" 'projectile-mode)
(safe-diminish "paredit" 'paredit-mode "()")Completion
Auto-Complete has been a part of my config for years, but I want to try out company-mode. If I code in an environment with good completion, I've made an habit of trying to guess function-names, and looking at the completions for the right one. So I want a pretty aggressive completion system, hence the no delay settings and short prefix length.
(setq company-idle-delay 0
company-echo-delay 0
company-dabbrev-downcase nil
company-minimum-prefix-length 2
company-selection-wrap-around t
company-transformers '(company-sort-by-occurrence
company-sort-by-backend-importance))Helm
I've been a long time user of ido-mode along with ido-vertical-mode, and
don't have any particular complaints. Though I've got a feeling I'm missing
out on something by not using helm. I will this excellent tutorial as a
starting point, along with some of the suggested configurations.
helm has a wonderful feature, being able to grep files by C-s anywhere,
which is useful. ack is a great grep-replacement, and is designed to
search source code, so I want to use that if it's available.
Note that some changes in bindings are located in the key bindings (found near the end of the configuration).
(require 'helm)
(require 'helm-config)
(setq helm-split-window-in-side-p t
helm-M-x-fuzzy-match t
helm-buffers-fuzzy-matching t
helm-recentf-fuzzy-match t
helm-move-to-line-cycle-in-source t
projectile-completion-system 'helm)
(when (executable-find "ack")
(setq helm-grep-default-command
"ack -Hn --no-group --no-color %e %p %f"
helm-grep-default-recurse-command
"ack -H --no-group --no-color %e %p %f"))
(helm-mode 1)
(helm-projectile-on)
(helm-adaptive-mode 1)Calendar
Define a function to display week numbers in calender-mode. The snippet
is from EmacsWiki.
(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.
(calendar-show-week t)Set Monday as the first day of the week, and set my location.
(setq calendar-week-start-day 1
calendar-latitude 60.0
calendar-longitude 10.7
calendar-location-name "Oslo, Norway")mu4e and offlineimap
I might not be at a computer using my very specific mail-setup, but if my mail-folder exists, then it's probably safe to load.
(defvar load-mail-setup (file-exists-p "~/.ifimail"))I use mu4e (which is a part of mu) along with offlineimap on one of my computers.
mu4e
mu4e must be informed where it can find your mail and where the different folders of interest are located. Some additional mu4e-tweaks are supplied here as well.
message-insert-signature is an existing Emacs function, that adds your
signature prefixed by a "-- " at the end of the email, which is a
convention I don't really follow. I redefine it as a function that adds
some newlines and my signature at the top of the email.
(when load-mail-setup
(eval-after-load 'mu4e
'(progn
;; Some basic mu4e settings.
(setq mu4e-maildir "~/.ifimail" ; top-level Maildir
mu4e-sent-folder "/Sent Items" ; folder for sent messages
mu4e-drafts-folder "/INBOX.Drafts" ; unfinished messages
mu4e-trash-folder "/INBOX.Trash" ; trashed 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))
(add-hook 'mu4e-compose-mode-hook
(lambda ()
(auto-fill-mode 0)
(visual-line-mode 1)
(ispell-change-dictionary "norsk")))
(add-hook 'mu4e-view-mode-hook (lambda () (visual-line-mode 1)))
(defun message-insert-signature ()
(goto-char (point-min))
(search-forward-regexp "^$")
(insert "\n\n\n" mu4e-compose-signature))))
(autoload 'mu4e "mu4e" nil t))Flyspell
Flyspell offers on-the-fly spell checking. We can enable flyspell for all text-modes with this snippet.
(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.
(add-hook 'prog-mode-hook 'flyspell-prog-mode)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.
(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.
(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))))(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.
(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.
(setq org-src-fontify-natively t
org-src-tab-acts-natively t
org-confirm-babel-evaluate nil
org-edit-src-content-indentation 0)
This is quite an ugly fix for allowing code markup for expressions like
"this string", because the quotation marks causes problems.
;;(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
<<sec:defuns>>
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.
(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.
(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).
(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.
(defun duplicate-thing (comment)
"Duplicates the current line, or the region if active. If an argument is
given, the duplicated region will be commented out."
(interactive "P")
(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))
(when comment (comment-region start end)))))To tidy up a buffer we define this function borrowed from simenheg.
(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.
(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.
(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 adjust the size of everything
(not just a buffer like text-scale-mode provides). This is not a
particularly neat solution, but it works OK. It simply
increases/decreases the size of the font. It assumes that your using
Inconsolata with size 14 by default. This should be probably be
generalized (or maybe be substituted by a package if it's out there).
(defun global-scale-default ()
(interactive)
(set-face-attribute 'default nil :font "Inconsolata-14"))
(lexical-let ((size 14))
(defun global-scale-up ()
(interactive)
(set-face-attribute
'default nil
:font (concat "Inconsolata-" (number-to-string (incf size)))))
(defun global-scale-down ()
(interactive)
(set-face-attribute
'default nil
:font (concat "Inconsolata-" (number-to-string (decf size))))))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.
(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!
(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.
(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.
(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.
(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.
(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 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 is a library manager for Common Lisp,
and you can install Slime following the instructions from the site along
with this snippet.
(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).
(setq inferior-lisp-program "sbcl")
More sensible loop indentation, borrowed from simenheg.
(setq lisp-loop-forms-indentation 6
lisp-simple-loop-indentation 2
lisp-loop-keyword-indentation 6)Scheme
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.
(eval-after-load "geiser"
'(setq geiser-active-implementations '(guile)))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.
(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.
(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.
(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.
(defun asm-setup ()
(setq comment-start "#")
(local-set-key (kbd "C-c C-c") 'compile))
(add-hook 'asm-mode-hook 'asm-setup)LaTeX and org-mode LaTeX export
.tex-files should be associated with latex-mode instead of
tex-mode.
(add-to-list 'auto-mode-alist '("\\.tex\\'" . latex-mode))
Use biblatex for bibliography.
(setq-default bibtex-dialect 'biblatex)I like using the Minted package for source blocks in LaTeX. To make org use this we add the following snippet.
(eval-after-load 'org
'(add-to-list 'org-latex-packages-alist '("" "minted")))
(setq org-latex-listings 'minted)
Because Minted uses Pygments (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).
(eval-after-load 'tex-mode
'(setcar (cdr (cddaar tex-compile-commands)) " -shell-escape "))
When exporting from Org to LaTeX, use latexmk for compilation.
(eval-after-load 'ox-latex
'(setq org-latex-pdf-process
'("latexmk -pdflatex='pdflatex -shell-escape -interaction nonstopmode' -pdf -f %f")))For my thesis, I need to use our university's LaTeX class, this snippet makes that class available.
(eval-after-load "ox-latex"
'(progn
(add-to-list 'org-latex-classes
'("ifimaster"
"\\documentclass{ifimaster}
[DEFAULT-PACKAGES]
[PACKAGES]
[EXTRA]
\\usepackage{babel,csquotes,ifimasterforside,url,varioref}"
("\\chapter{%s}" . "\\chapter*{%s}")
("\\section{%s}" . "\\section*{%s}")
("\\subsection{%s}" . "\\subsection*{%s}")
("\\subsubsection{%s}" . "\\subsubsection*{%s}")
("\\paragraph{%s}" . "\\paragraph*{%s}")
("\\subparagraph{%s}" . "\\subparagraph*{%s}")))
(custom-set-variables '(org-export-allow-bind-keywords t))))Markdown
This makes .md-files open in markdown-mode.
(add-to-list 'auto-mode-alist '("\\.md\\'" . markdown-mode))
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.
(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!
(add-hook 'markdown-mode-hook
(lambda ()
(auto-fill-mode 0)
(visual-line-mode 1)
(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.
(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.
(eval-after-load 'matlab
'(add-to-list 'matlab-shell-command-switches "-nosplash"))Key bindings
Inspired by this StackOverflow post 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.
(defvar custom-bindings-map (make-keymap)
"A keymap for custom bindings.")Bindings for olivetti.
(define-key custom-bindings-map (kbd "C-c [") 'olivetti-shrink)
(define-key custom-bindings-map (kbd "C-c ]") 'olivetti-expand)Bindings for define-word.
(define-key custom-bindings-map (kbd "C-c D") 'define-word-at-point)Bindings for expand-region.
(define-key custom-bindings-map (kbd "C-'") 'er/expand-region)
(define-key custom-bindings-map (kbd "C-\"") 'er/contract-region)Bindings for multiple-cursors.
(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.
(define-key custom-bindings-map (kbd "C-c m") 'magit-status)Bindings for ace-jump-mode.
(define-key custom-bindings-map (kbd "C-c SPC") 'ace-jump-mode)Bindings for company-mode.
(define-key company-active-map (kbd "C-d") 'company-show-doc-buffer)
(define-key company-active-map (kbd "C-n") 'company-select-next)
(define-key company-active-map (kbd "C-p") 'company-select-previous)
(define-key company-active-map (kbd "<tab>") 'company-complete)
(define-key company-mode-map (kbd "C-:") 'helm-company)
(define-key company-active-map (kbd "C-:") 'helm-company)Bindings for Helm.
(define-key custom-bindings-map (kbd "C-c h") 'helm-command-prefix)
(define-key custom-bindings-map (kbd "M-x") 'helm-M-x)
(define-key custom-bindings-map (kbd "M-y") 'helm-show-kill-ring)
(define-key custom-bindings-map (kbd "C-x b") 'helm-mini)
(define-key custom-bindings-map (kbd "C-x C-f") 'helm-find-files)
(define-key custom-bindings-map (kbd "C-c h o") 'helm-occur)
(define-key custom-bindings-map (kbd "C-c h g") 'helm-google-suggest)
(define-key custom-bindings-map (kbd "M-i") 'helm-swoop)
(define-key custom-bindings-map (kbd "M-I") 'helm-multi-swoop-all)
(define-key helm-map (kbd "<tab>") 'helm-execute-persistent-action)
(define-key helm-map (kbd "C-i") 'helm-execute-persistent-action)
(define-key helm-map (kbd "C-z") 'helm-select-action)
Bindings for move-text.
(define-key custom-bindings-map (kbd "<M-S-up>") 'move-text-up)
(define-key custom-bindings-map (kbd "<M-S-down>") 'move-text-down)Bind some native Emacs functions.
(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 m") 'mu4e)Bind the functions defined above.
(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-c C-0") 'global-scale-default)
(define-key custom-bindings-map (kbd "C-c C-=") 'global-scale-up)
(define-key custom-bindings-map (kbd "C-c C--") 'global-scale-down)
(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 "<C-tab>") 'tidy)
Lastly we need to activate the map by creating and activating the
minor-mode.
(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 - 2015 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 <http://www.gnu.org/licenses/>.