| .gitignore | ||
| email-style.css | ||
| init.el | ||
| init.org | ||
| LICENSE.md | ||
| README.org | ||
Emacs configuration file
- About
- Meta
- Packages
- Mac OS X
- Sane defaults
- Modes
- Visual
- Version control
- Dashboard
- EditorConfig
- Projectile
- Ivy/Counsel
- PDF Tools
- Completion
- Spelling
- Org
- Markdown
- Direnv
- ChatGPT
- Expand region
- Interactive functions
- Advice
- global-scale-mode
- Mode specific
- Org-mode LaTeX export
- Key bindings
- License
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!
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.elI want lexical scoping for the init-file, which can be specified in the header. The first line of the configuration is as follows:
;;; -*- lexical-binding: t -*-
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))
(when custom-file
(load-file custom-file))
(server-start))))
A common optimization is to temporarily disable garbage collection during
initialization. Here, we set the gc-cons-threshold to a ridiculously large
number, and restore the default value after initialization.
(let ((old-gc-treshold gc-cons-threshold))
(setq gc-cons-threshold most-positive-fixnum)
(add-hook 'after-init-hook
(lambda () (setq gc-cons-threshold old-gc-treshold))))Packages
John Wiegley's extremely popular use-package was included in Emacs 29. It provides a powerful macro for isolating package configuration. After ignoring this for a decade, I'll budge and give it a whirl.
(require 'use-package)
(setq use-package-always-ensure t)Packages can be fetched from different mirrors, melpa is the largest archive and is well maintained.
(setq package-archives
'(("GNU ELPA" . "https://elpa.gnu.org/packages/")
("MELPA Stable" . "https://stable.melpa.org/packages/")
("MELPA" . "https://melpa.org/packages/"))
package-archive-priorities
'(("GNU ELPA" . 10)
("MELPA" . 5)
("MELPA Stable" . 0)))The configuration assumes that the packages listed below are installed. To ensure we install missing packages if they are missing.
(let* ((package--builtins nil)
(packages
'(minizinc-mode ; Major mode for MiniZinc code
multiple-cursors ; Multiple cursors for Emacs
nano-modeline ; N Λ N O modeline
nano-theme ; N Λ N O theme
nix-mode ; Major mode for editing .nix files
olivetti ; Minor mode for a nice writing environment
org ; Outline-based notes management and organizer
org-bullets ; Show bullets in org-mode as UTF-8 characters
org-msg ; Org mode to send and reply to email in HTML
ox-gfm ; Export Github Flavored Markdown from Org
paredit ; minor mode for editing parentheses
pdf-tools ; Emacs support library for PDF files
proof-general ; A generic Emacs interface for proof assistants
racket-mode ; Major mode for Racket language
rustic ; Rust development environment
slime ; Superior Lisp Interaction Mode for Emacs
try ; Try out Emacs packages
vterm ; A terminal via libvterm
which-key ; Display available keybindings in popup
z3-mode))) ; z3/SMTLIBv2 interactive development
(when (memq window-system '(mac ns))
(push 'exec-path-from-shell packages)
(push 'reveal-in-osx-finder packages))
(let ((packages (seq-remove 'package-installed-p packages)))
(when packages
;; Install uninstalled packages
(package-refresh-contents)
(mapc 'package-install packages))))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
native-comp-async-report-warnings-errors nil)
(exec-path-from-shell-initialize)
(when (fboundp 'mac-auto-operator-composition-mode)
(mac-auto-operator-composition-mode 1))
(require 'ls-lisp)
(setq ls-lisp-use-insert-directory-program nil))Sane defaults
These are what I consider to be saner defaults.
We can set variables to whatever value we'd like using setq.
(setq auto-revert-interval 1 ; Refresh buffers fast
default-input-method "TeX" ; Use TeX when toggling input method
echo-keystrokes 0.1 ; Show keystrokes asap
frame-inhibit-implied-resize 1 ; Don't resize frame implicitly
inhibit-startup-screen t ; No splash screen please
initial-scratch-message nil ; Clean scratch buffer
recentf-max-saved-items 10000 ; Show more recent files
ring-bell-function 'ignore ; Quiet
scroll-margin 1 ; Space between cursor and top/bottom
sentence-end-double-space nil ; No double space
custom-file ; Customizations in a separate file
(concat user-emacs-directory "custom.el"))
;; 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 tab-width 4 ; Smaller tabs
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 160 ; Split verticly by default
split-height-threshold nil ; Split verticly by default
frame-resize-pixelwise t ; Fine-grained frame resize
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
delete-selection-mode ; Replace selected text
dirtrack-mode ; directory tracking in *shell*
global-so-long-mode ; Mitigate performance for long lines
recentf-mode ; Recently opened files
show-paren-mode ; Highlight matching parentheses
which-key-mode)) ; Available keybindings in popup
(funcall mode 1))Visual
I am using a lot from rougier's N Λ N O Emacs, starting with the theme.
Theme
For the light theme, I keep the light background toned down a touch.
(setq nano-light-background "#fafafa"
nano-light-highlight "#f5f7f8")The theme is set according to the system appearance (on macOS) if that is available, defaulting to a light theme.
(defun load-nano-theme (variant)
(let ((theme (intern (concat "nano-" (symbol-name variant)))))
(load-theme theme t)))
(load-nano-theme (if (boundp 'ns-system-appearance) ns-system-appearance 'light))Let's have Emacs change theme when the system appearance changes as well.
(when (boundp 'ns-system-appearance-change-functions)
(add-hook 'ns-system-appearance-change-functions 'load-nano-theme))I want to be able to quickly switch between a light and a dark theme.
(defun cycle-themes ()
"Returns a function that lets you cycle your themes."
(let ((themes '(nano-light nano-dark)))
(lambda ()
(interactive)
;; Rotates the thme cycle and changes the current theme.
(let ((rotated (nconc (cdr themes) (list (car themes)))))
(load-theme (car (setq themes rotated)) t))
(message (concat "Switched to " (symbol-name (car themes)))))))Mode line
This is the default setup for N Λ N O Modeline after version 1.0.0:
(require 'nano-modeline)
(add-hook 'prog-mode-hook #'nano-modeline-prog-mode)
(add-hook 'text-mode-hook #'nano-modeline-text-mode)
(add-hook 'org-mode-hook #'nano-modeline-org-mode)
(add-hook 'pdf-view-mode-hook #'nano-modeline-pdf-mode)
(add-hook 'mu4e-headers-mode-hook #'nano-modeline-mu4e-headers-mode)
(add-hook 'mu4e-view-mode-hook #'nano-modeline-mu4e-message-mode)
(add-hook 'elfeed-show-mode-hook #'nano-modeline-elfeed-entry-mode)
(add-hook 'elfeed-search-mode-hook #'nano-modeline-elfeed-search-mode)
(add-hook 'term-mode-hook #'nano-modeline-term-mode)
(add-hook 'xwidget-webkit-mode-hook #'nano-modeline-xwidget-mode)
(add-hook 'messages-buffer-mode-hook #'nano-modeline-message-mode)
(add-hook 'org-capture-mode-hook #'nano-modeline-org-capture-mode)
(add-hook 'org-agenda-mode-hook #'nano-modeline-org-agenda-mode)
We set the nano-modeline-text-mode as default with:
(nano-modeline-text-mode 1)And disable the default modeline.
(setq-default mode-line-format nil)It looks best if we add a small margin around the edges of the frame.
(add-to-list 'default-frame-alist '(internal-border-width . 24))Font
Pick the first of the following fonts that is installed on the system.
(cond ((member "Source Code Pro" (font-family-list))
(set-face-attribute 'default nil :font "Source Code Pro-15"))
((member "Roboto Mono" (font-family-list))
(set-face-attribute 'default nil :font "Roboto Mono-14"))
((member "Fira Code" (font-family-list))
(set-face-attribute 'default nil :font "Fira Code-15"))
((member "Inconsolata" (font-family-list))
(set-face-attribute 'default nil :font "Inconsolata-14")))
New in Emacs 24.4 is the prettify-symbols-mode! It's neat.
(setq-default prettify-symbols-alist '(("lambda" . ?λ)
("delta" . ?Δ)
("gamma" . ?Γ)
("phi" . ?φ)
("psi" . ?ψ)))Centering with Olivetti
Olivetti is a package that simply centers the text of a buffer. It is very simple and beautiful. The default width is just a bit short.
(with-eval-after-load 'olivetti
(setq-default olivetti-body-width (+ fill-column 3))
(remove-hook 'olivetti-mode-on-hook 'visual-line-mode))Focusing with focus
Focus is my own package. It looks pretty nice, especially in combination with Olivetti!
;; Dim color of text in surrounding sections
(use-package focus
:defer t
:bind ("C-c q" .
(lambda ()
(interactive)
(focus-mode 1)
(focus-read-only-mode 1))))Version control
Magit is the best.
;; A Git porcelain inside Emacs.
(use-package magit
:bind ("C-c m" . magit-status))Have some visual indication where there are uncommitted changes.
;; Highlight uncommitted changes using VC
(use-package diff-hl
:config
(global-diff-hl-mode 1))Dashboard
;; A startup screen extracted from Spacemacs
(use-package dashboard
:config
(setq dashboard-banner-logo-title nil
dashboard-center-content t
dashboard-set-footer nil
dashboard-page-separator "\n\n\n"
dashboard-items '((projects . 15)
(recents . 15)
(bookmarks . 5)))
(dashboard-setup-startup-hook))EditorConfig
Using EditorConfig is a must when collaborating with others. It is also a way of having multiple tools that want to format your buffer to agree (e.g. both the language's Emacs mode and some external formatter/prettifier).
;; EditorConfig Emacs Plugin
(use-package editorconfig
:config
(editorconfig-mode 1))Projectile
;; Manage and navigate projects in Emacs easily
(use-package projectile
:bind ("C-c p" . projectile-command-map))Ivy/Counsel
Ivy is a completion system, giving you completions and fuzzy search whenever you interact with the minibuffer. I transitioned to Ivy from Helm, mainly due to it being aesthetically noisy, and that I didn't fully take advantage of all its features (which are numerous). Here are some customization's that made the transition a bit easier.
;; Incremental Vertical completion
(use-package ivy
:bind ("C-x b" . ivy-switch-buffer)
:config
(setq ivy-wrap t ; Easier access to the last candidate
ivy-height 25 ; Give me more candidates to look at
ivy-use-virtual-buffers t ; C-x b displays recents and bookmarks
ivy-count-format "(%d/%d) " ; Display both the index and the count
ivy-on-del-error-function 'ignore ; Lets me hold in backspace
ivy-posframe-min-width 100 ; Keep ivy reasonably narrow
ivy-posframe-height ivy-height ; Maintain the height given by ivy
ivy-virtual-abbreviate 'abbreviate) ; Disambiguate same file in different dirs
(ivy-mode 1))The completions are centered in a posframe (a frame at point).
;; Using posframe to show Ivy
(use-package ivy-posframe
:config
(ivy-posframe-mode 1))
Use counsel for M-x, yanking and finding files.
;; Various completion functions using Ivy
(use-package counsel
:bind
(("M-x" . counsel-M-x)
("M-y" . counsel-yank-pop)
("C-x C-f" . counsel-find-file)))Use swiper for fancy search.
;; Isearch with an overview. Oh, man!
(use-package swiper
:bind ("C-c i" . swiper-isearch))Have Ivy play with nice with Projectile.
;; Ivy integration for Projectile
(use-package counsel-projectile
:config
(counsel-projectile-mode 1))Use smex to prioritize frequently used commands.
;; M-x interface with Ido-style fuzzy matching
(use-package smex)PDF Tools
PDF Tools makes a huge improvement on the built-in doc-view-mode; the only
drawback is the pdf-tools-install (which has to be executed before the
package can be used) takes a couple of seconds to execute. Instead of
running it at init-time, we'll run it whenever a PDF is opened. Note that
it's only slow on the first run!
(pdf-loader-install)(add-hook 'pdf-view-mode-hook
(lambda () (setq header-line-format nil)))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.
;; Modular text completion framework
(use-package company
:bind (;; Note that a bug (probably) makes the quotes necessary here
:map company-active-map
("C-d" . 'company-show-doc-buffer)
("C-n" . 'company-select-next)
("C-p" . 'company-select-previous))
:config
(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))
(global-company-mode 1))Spelling
Flyspell
Flyspell offers on-the-fly spell checking.
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."
(let ((ispell-languages (list "american" "norsk")))
(lambda ()
(interactive)
;; Rotates the languages cycle and changes the ispell dictionary.
(let ((rotated (nconc (cdr ispell-languages) (list (car ispell-languages)))))
(ispell-change-dictionary (car (setq ispell-languages rotated)))))))
We enable flyspell-mode for all text-modes, and use flyspell-prog-mode
for spell checking comments and strings in all programming modes. We bind
C-c l to a function returned from cycle-languages, giving a language
switcher for every buffer where flyspell is enabled.
(use-package flyspell
:defer t
:if (executable-find "aspell")
:hook ((text-mode . flyspell-mode)
(prog-mode . flyspell-prog-mode)
(flyspell-mode . (lambda ()
(local-set-key
(kbd "C-c l")
(cycle-languages)))))
:config
(ispell-change-dictionary "american" t))Define word
This super neat package looks up the word at point. I use it a lot!
;; display the definition of word at point
(use-package define-word
:defer t
:bind ("C-c D" . define-word-at-point))Org
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.
(with-eval-after-load 'org
(require 'org-tempo)
(setcar (nthcdr 2 org-emphasis-regexp-components) " \t\n,")
(custom-set-variables `(org-emphasis-alist ',org-emphasis-alist)))Enable org-bullets when opening org-files.
(add-hook 'org-mode-hook (lambda () (org-bullets-mode 1)))Markdown
;; Emacs Major mode for Markdown-formatted files
(use-package markdown-mode
:defer t)Direnv
I use direnv in combination with nix to allow for programs to only be
available in certain directories. The emacs-direnv makes Emacs play nice with
direnv, so that it for instance can detect a language server that is only
available within some project. The direnv-always-show-summary is set to
nil to avoid having long messages pop up in the messages buffer whenever I
enter a directory that interacts with direnv.
;; direnv integration
(use-package direnv
:config
(setq direnv-always-show-summary nil)
(direnv-mode 1))I've used Emacs for email in the past, where I've always had the need for a more standard email client in addition. I'm going to give it another go.
(defvar load-mail-setup
(and (file-exists-p "~/Maildir")
(executable-find "mbsync")
(executable-find "msmtp")
(executable-find "mu")))I use mu4e (which is a part of mu) along with mbsync.
(when load-mail-setup
(with-eval-after-load 'mu4e
(setq
mail-user-agent 'mu4e-user-agent
user-full-name "Lars Tveito" ; Your full name
user-mail-address "larstvei@ifi.uio.no" ; And email-address
sendmail-program (executable-find "msmtp")
send-mail-function 'smtpmail-send-it
message-sendmail-f-is-evil t
message-sendmail-extra-arguments '("--read-envelope-from")
message-send-mail-function 'message-send-mail-with-sendmail
message-kill-buffer-on-exit t
mu4e-get-mail-command (concat (executable-find "mbsync") " -a")
mu4e-change-filenames-when-moving t
mu4e-user-mail-address-list '("larstvei@ifi.uio.no")
mu4e-maildir-shortcuts '(("/Inbox" . ?i) ("/Sent Items" . ?s))
mu4e-sent-folder "/Sent Items"
mu4e-trash-folder "/Deleted Items"
mu4e-trash-folder "/Drafts"
mu4e-use-fancy-chars t)
(require 'org)
(require 'org-msg)
(add-to-list 'mu4e-compose-pre-hook 'org-msg-mode)
(setq org-msg-enforce-css (concat user-emacs-directory "email-style.css")
org-msg-options "html-postamble:nil toc:nil num:nil author:nil email:nil"
org-msg-default-alternatives '((new . (text html))
(reply-to-html . (text html))
(reply-to-text . (text)))
org-msg-signature "
,#+begin_signature
,#+begin_export html
- Lars
,#+end_export
,#+end_signature\n"))
(autoload 'mu4e "mu4e" nil t))ChatGPT
I have a line like this:
machine api.openai.com password OPEN-AI-KEY
in my .authinfo file. Then the chatgpt-shell-openai-key can by set by:
;; Interaction mode for ChatGPT
(use-package chatgpt-shell
:defer t
:config
(setq chatgpt-shell-openai-key
(auth-source-pick-first-password
:host "api.openai.com")));; Org babel functions for ChatGPT evaluation
(use-package ob-chatgpt-shell
:defer t)Expand region
This is neat, and I use it way less than I should.
;; Increase selected region by semantic units
(use-package expand-region
:defer t
:bind ("C-=" . er/expand-region))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) (line-beginning-position)))
(end (if (region-active-p) (region-end) (line-end-position)))
(fill-column most-positive-fixnum))
(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)))))Org mode does currently not support synctex (which enables you to jump from a point in your TeX-file to the corresponding point in the pdf), and it seems like a tricky problem.
Calling this function from an org-buffer jumps to the corresponding section in the exported pdf (given that the pdf-file exists), using pdf-tools.
(defun org-sync-pdf ()
(interactive)
(let ((headline (nth 4 (org-heading-components)))
(pdf (concat (file-name-base (buffer-name)) ".pdf")))
(when (file-exists-p pdf)
(find-file-other-window pdf)
(pdf-links-action-perform
(cl-find headline (pdf-info-outline pdf)
:key (lambda (alist) (cdr (assoc 'title alist)))
:test 'string-equal)))))The opposite of fill paragraph (from EmacsWiki),
(defun unfill-paragraph ()
(interactive)
(let ((fill-column most-positive-fixnum))
(fill-paragraph nil (region-active-p))))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))global-scale-mode
These functions provide something close to text-scale-mode, but for every
buffer, including the minibuffer and mode line.
(let* ((default (face-attribute 'default :height))
(size default))
(defun global-scale-default ()
(interactive)
(global-scale-internal (setq size default)))
(defun global-scale-up ()
(interactive)
(global-scale-internal (setq size (+ size 20))))
(defun global-scale-down ()
(interactive)
(global-scale-internal (setq size (- size 20))))
(defun global-scale-internal (arg)
(set-face-attribute 'default (selected-frame) :height arg)
(set-temporary-overlay-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "C-=") 'global-scale-up)
(define-key map (kbd "C-+") 'global-scale-up)
(define-key map (kbd "C--") 'global-scale-down)
(define-key map (kbd "C-0") 'global-scale-default) map))))Mode specific
Eglot
I am using eglot, which is built in from emacs 29.1. Some performance issues
led me to set eglot-events-buffer-size to 0.
(setq eglot-events-buffer-size 0)
(add-hook 'eglot-managed-mode-hook (lambda () (eglot-inlay-hints-mode -1)))Compilation
I often run latexmk -pdf -pvc in a compilation buffer, which recompiles
the latex-file whenever it is changed. This often results in annoyingly
large compilation buffers; the following snippet limits the buffer size in
accordance with comint-buffer-maximum-size, which defaults to 1024 lines.
(add-hook 'compilation-filter-hook 'comint-truncate-buffer)vterm
Inspired by torenord, I maintain quick access to shell buffers with bindings
M-1 to M-9. In addition, the M-z toggles between the last visited
shell, and the last visited non-shell buffer. The following functions
facilitate this, and are bound in the /larstvei/emacs/src/commit/bf1adf019a1974c408e0feed04310f4e3abda7e9/Key%20bindings section.
(let ((last-vterm ""))
(defun toggle-vterm ()
(interactive)
(cond ((string-match-p "^\\vterm<[1-9][0-9]*>$" (buffer-name))
(goto-non-vterm-buffer))
((get-buffer last-vterm) (switch-to-buffer last-vterm))
(t (vterm (setq last-vterm "vterm<1>")))))
(defun goto-non-vterm-buffer ()
(let* ((r "^\\vterm<[1-9][0-9]*>$")
(vterm-buffer-p (lambda (b) (string-match-p r (buffer-name b))))
(non-vterms (cl-remove-if vterm-buffer-p (buffer-list))))
(when non-vterms
(switch-to-buffer (car non-vterms)))))
(defun switch-vterm (n)
(let ((buffer-name (format "vterm<%d>" n)))
(setq last-vterm buffer-name)
(cond ((get-buffer buffer-name)
(switch-to-buffer buffer-name))
(t (vterm buffer-name)
(rename-buffer buffer-name))))))
Don't query whether or not the shell-buffer should be killed, just kill
it.
(defadvice vterm (after kill-with-no-query nil activate)
(set-process-query-on-exit-flag (get-buffer-process ad-return-value) nil))Lisp
I use Paredit when editing lisp code, we enable this for all lisp-modes.
(dolist (mode '(cider-repl-mode
clojure-mode
ielm-mode
racket-mode
racket-repl-mode
slime-repl-mode
lisp-mode
emacs-lisp-mode
lisp-interaction-mode
scheme-mode))
;; add paredit-mode to all mode-hooks
(add-hook (intern (concat (symbol-name mode) "-hook")) 'paredit-mode))Paredit version 25 seems to interfere with REPL-modes. This is the proposed fix:
(with-eval-after-load 'paredit
(define-key paredit-mode-map (kbd "RET") nil))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)Clojure
A very simple setup for Clojure. Cider works pretty much out of the box!
;; Clojure Interactive Development Environment
(use-package cider
:defer t
:bind (:map cider-repl-mode-map ("C-l" . cider-repl-clear-buffer)));; Commands for refactoring Clojure code
(use-package clj-refactor
:defer t)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.el")
(load (expand-file-name "~/.quicklisp/slime-helper.el"))
(define-key slime-repl-mode-map (kbd "C-l")
'slime-repl-clear-buffer))
(remove-hook 'common-lisp-mode-hook #'activate-slime-helper))
(add-hook 'common-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)Python
(setq python-shell-interpreter "python3.10")
(add-hook 'python-mode-hook
(lambda () (setq forward-sexp-function nil)))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-hook 'c-setup)Java
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.
(add-hook 'java-mode-hook 'eglot-ensure)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
;; Integrated environment for *TeX*
(use-package auctex
:defer t)Erlang
Erlang mode works out of the box.
;; Erlang major mode
(use-package erlang
:defer t)Org-mode LaTeX export
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='xelatex -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}")))
(add-to-list 'org-latex-classes
'("easychair" "\\documentclass{easychair}"
("\\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))))
Use Emacs for opening the PDF file, when invoking C-c C-e l o.
(require 'org)
(add-to-list 'org-file-apps '("\\.pdf\\'" . emacs))
(setq org-adapt-indentation t)(setq org-babel-python-command "python3")
(org-babel-do-load-languages
'org-babel-load-languages
'((emacs-lisp . t)
(python . t)
(clojure . t)))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.
;; A Haskell editing mode
(use-package haskell-mode
:defer t
:hook ((haskell-mode . interactive-haskell-mode)
(haskell-mode . turn-on-haskell-doc-mode)
(haskell-mode . turn-on-haskell-indent)))Maude
Use --- for comments in Maude.
;; Emacs mode for the programming language Maude
(use-package maude-mode
:defer t
:hook (maude-mode . (lambda () (setq-local comment-start "---")))
:config
(add-to-list 'maude-command-options "-no-wrap"))Minizinc
(add-to-list 'auto-mode-alist '("\\.mzn\\'" . minizinc-mode))
(defun minizinc-setup ()
(let ((command (concat "minizinc " (buffer-file-name) " "))
(f (concat (file-name-base (buffer-file-name)) ".dzn")))
(local-set-key (kbd "C-c C-c") 'recompile)
(setq-local compile-command (concat command (if (file-exists-p f) f "")))))
(add-hook 'minizinc-mode-hook 'minizinc-setup)Coq
;; A collection of extensions PG's Coq mode
(use-package company-coq
:hook (coq-mode . company-coq-mode))Rust
(setq rustic-lsp-client 'eglot)Go
;; Major mode for the Go programming language
(use-package go-mode
:defer t
:mode "\\.go\\'"
:hook (go-mode . eglot-ensure))Lua
;; a major-mode for editing Lua scripts
(use-package lua-mode
:defer t)Webdev
My webdev setup isn't much, but with eglot, I don't find myself missing much. It depends on Tree-sitter, which was added in emacs 29.1.
The following is what I use for plain Javascript:
(add-to-list 'auto-mode-alist '("\\.jsx?\\'" . js-ts-mode))
(add-hook 'js-ts-mode-hook 'eglot-ensure)Similarly for Typescript:
(add-to-list 'auto-mode-alist '("\\.tsx?\\'" . tsx-ts-mode))
(add-hook 'tsx-ts-mode-hook 'eglot-ensure)
(setq typescript-ts-mode-indent-offset 4)I am using Svelte for some projects, where I find web-mode along with the Svelte Language Server to work well.
(add-to-list 'auto-mode-alist '("\\.svelte\\'" . web-mode))
(add-hook 'web-mode-hook 'eglot-ensure)
(with-eval-after-load "web-mode"
(add-to-list 'web-mode-engines-alist '("svelte" . "\\.svelte\\'")))
(with-eval-after-load "eglot"
(add-to-list 'eglot-server-programs
'(web-mode . ("svelteserver" "--stdio"))))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 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 Olivetti
(define-key custom-bindings-map (kbd "C-c o") 'olivetti-mode)Bindings for mu4e
(define-key custom-bindings-map (kbd "C-x m") 'mu4e)Bindings for built-ins
(define-key custom-bindings-map (kbd "M-u") 'upcase-dwim)
(define-key custom-bindings-map (kbd "M-c") 'capitalize-dwim)
(define-key custom-bindings-map (kbd "M-l") 'downcase-dwim)
(define-key custom-bindings-map (kbd "M-]") 'other-frame)
(define-key custom-bindings-map (kbd "C-j") 'newline-and-indent)
(define-key custom-bindings-map (kbd "C-c s") 'ispell-word)
(define-key comint-mode-map (kbd "C-l") 'comint-clear-buffer)Bindings for 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-up)
(define-key custom-bindings-map (kbd "C-c C--") 'global-scale-down)
(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)
(define-key custom-bindings-map (kbd "C-z") 'toggle-vterm)
(dolist (n (number-sequence 1 9))
(let ((key (concat "M-" (int-to-string n))))
(with-eval-after-load 'vterm
(define-key vterm-mode-map (kbd key) nil))
(define-key custom-bindings-map (kbd key)
(lambda () (interactive) (switch-vterm n)))))
(with-eval-after-load 'org
(define-key org-mode-map (kbd "C-'") 'org-sync-pdf))
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 - 2023 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/>.