#+title: Emacs configuration #+author: Oreodave #+description: My new Emacs configuration #+property: header-args:emacs-lisp :tangle config.el :comments link #+options: toc:nil #+begin_center My configuration for vanilla Emacs #+end_center #+latex: \clearpage * Initial :PROPERTIES: :HTML_CONTAINER: details :END: Let's setup some basics. Firstly, set full name and mail address for use in a variety of applications, including encryption. #+begin_src emacs-lisp (setq user-full-name "Aryadev Chavali" user-mail-address "aryadev@aryadevchavali.com") #+end_src Let's set all yes or no questions to single letter responses. #+begin_src emacs-lisp (fset 'yes-or-no-p 'y-or-n-p) #+end_src ** Coding system Set the encoding to utf-8-unix by default. #+begin_src emacs-lisp (use-package emacs :straight nil :init (setq-default buffer-file-coding-system 'utf-8-unix save-buffer-coding-system 'utf-8-unix)) #+end_src ** No littering Setup no-littering, which cleans up many of the default directories in Emacs. #+begin_src emacs-lisp (straight-use-package 'no-littering) (setq no-littering-etc-directory (expand-file-name ".config/" user-emacs-directory) no-littering-var-directory (expand-file-name ".local/" user-emacs-directory)) (require 'no-littering) #+end_src ** File saves and custom file Now let's setup file saving and auto-revert-mode. Along with that, setup the custom-file to exist in the var-directory #+begin_src emacs-lisp (use-package emacs :straight nil :init (setq backup-directory-alist `(("." . ,(no-littering-expand-var-file-name "saves/"))) global-auto-revert-non-file-buffers nil auto-revert-verbose nil) (setq custom-file (no-littering-expand-etc-file-name "custom.el")) :config (global-auto-revert-mode 1)) #+end_src ** Hide-show mode Turn on hs minor mode for all prog-mode. #+begin_src emacs-lisp (use-package hideshow :straight nil :hook (prog-mode-hook . hs-minor-mode)) #+end_src ** Aesthetics Load my custom "personal-theme" theme (look at [[file:personal-theme.el][this file]]). #+begin_src emacs-lisp (use-package custom :demand t :straight nil :config (load-theme 'monokai t)) #+end_src Set font size to 125 if no monitor is plugged in. #+begin_src emacs-lisp (use-package faces :straight nil :config (set-face-attribute 'default nil :height 115)) #+end_src Turn off the startup buffer because I prefer [[Dashboard]], and write into the scratch buffer some nice information about Emacs. #+begin_src emacs-lisp (use-package startup :straight nil :defer t :init (setq inhibit-startup-screen t initial-scratch-message (format ";; Emacs v%s\n" emacs-version) ring-bell-function 'ignore)) #+end_src Turn off blinking-cursor-mode as we will later be setting up hl-line, which does a better job of indicating where the cursor is on screen. #+begin_src emacs-lisp (use-package frame :straight nil :config (blink-cursor-mode 0)) #+end_src ** Path Setting the path variable cos it can get annoying sometimes #+begin_src emacs-lisp (use-package env :defer 1 :straight nil :config (setenv "PATH" (concat (expand-file-name "~/.local/bin:") (getenv "PATH")))) #+end_src * Custom Functions :PROPERTIES: :HTML_CONTAINER: details :END: These are custom functions I have defined for various purposes. ** New line function Vim bindings don't have a nice way of adding new lines before or after the current line while staying in normal mode. You can use =o/O= to enter insert mode at a new line, but this isn't the same as being able to stay in normal mode while opening newlines and only adds extra keypresses if your only purpose was to open up some lines. As this is Emacs I can extend it as I wish, so I decided to define a new line function that won't remove me from normal state. The logic is pretty simple: - Record current location as =old= - Use the predefined vim functions for opening new lines above and below with insert mode - Return to =old= - Enter normal state #+begin_src emacs-lisp (with-eval-after-load "evil" (defun dx:newline (&optional BACKWARD) (interactive) (save-excursion (cond ((and BACKWARD (= BACKWARD 1)) (evil-open-below 1)) (t (evil-open-above 1)))) (evil-normal-state))) #+end_src ** Toggle buffer There are many cases where 'toggling' a buffer is very useful. For example, toggling a shell to access it quickly and hide it away with little annoyance. This is negligible with a bit of Emacs lisp. However, as stated earlier, there are /many/ cases where this is useful. Following the DRY principle means a more abstract function would be better to use here. One may use higher order functions to create an abstract form that handles toggling, and then the caller can wrap this call in a new function if they wish to use it in a keybinding. This format or construct is kinda common (using a higher order function and wrapping it in an interactive function for use in a binding), so I created a macro that further wraps this functionality, creating a custom function for you. The macro asks for a function name, a buffer name and the function necessary to create a buffer with that name. It then generates a function with the given name that holds the necessary logic to 'toggle' buffers. #+begin_src emacs-lisp (defmacro +dx/create-toggle-function (func-name buf-name buf-create) "Generate a function named func-name that toggles the buffer with name buf-name and creation function buf-create." `(defun ,func-name () (interactive) (let* ((buffer (or (get-buffer ,buf-name) (,buf-create))) (displayed (get-buffer-window buffer))) (cond (displayed (select-window displayed) (delete-window)) (t (display-buffer buffer) (select-window (get-buffer-window buffer))))))) #+end_src ** Power function Basic, tail recursive algorithm for calculating powers. #+begin_src emacs-lisp (defun pow (a n &optional initial) "Raise a to the nth power. Use initial to set the initial value." (let ((init (or initial 1))) (if (= n 0) init (pow a (- n 1) (* a init))))) #+end_src ** Define procedure The =lambda= macro provides a function with possible arguments. A procedure is a type of form that takes no arguments. This macro returns an anonymous function with no arguments with all the forms provided. It returns it in 'backquoted' form as that is the most common use of this macro. #+begin_src emacs-lisp (defmacro proc (&rest CDR) "For a given list of forms CDR, return a quoted non-argument lambda." `(quote (lambda () ,@CDR))) #+end_src * Core packages :PROPERTIES: :HTML_CONTAINER: details :END: ** General Setup general, a good package for defining keys. In this case, I generate a new definer for the "LEADER" keys. Leader is bound to =SPC= and it's functionally equivalent to the doom/spacemacs leader. Local leader is bound to =SPC ,= and it's similar to doom/spacemacs leader but doesn't try to fully assimilate the local-leader map instead just picking stuff I think is useful. #+begin_src emacs-lisp (use-package general :demand t :config (general-def :states '(normal motion) "SPC" nil "M-V" #'dx:newline "M-v" (proc (interactive) (dx:newline 1))) (general-create-definer leader :states '(normal motion) :keymaps 'override :prefix "SPC") (general-create-definer local-leader :states '(normal motion) :prefix "SPC ,") (leader :infix "b" "d" #'kill-this-buffer)) #+end_src *** Some default binds in Emacs With a ton of use-package declarations (to defer until the last moment), bind to general some basic binds. #+begin_src emacs-lisp (use-package emacs :straight nil :general (general-def "C-x d" #'delete-frame) (general-def :states '(normal motion) "C--" #'text-scale-decrease "C-=" #'text-scale-increase) (leader "SPC" #'execute-extended-command "u" #'universal-argument ";" #'eval-expression "!" #'async-shell-command "q" #'save-buffers-kill-terminal "cF" (proc (interactive) (find-file "~/Code/"))) (leader :infix "f" "f" #'find-file "s" #'save-buffer "p" (proc (interactive) (find-file (concat user-emacs-directory "config.org"))))) (use-package compile :straight nil :general (leader "cc" #'compile)) (use-package imenu :straight nil :general (leader "si" #'imenu)) (use-package help :straight nil :general (leader "h" #'help-command)) #+end_src ** Evil :PROPERTIES: :HTML_CONTAINER: details :END: Evil (Emacs VI Layer) is a package that brings the Vi experience to Emacs. Packaged with it by default are: - The modal system - EX - Vi mapping functions This provides a lot of stuff for the average vim user moving to Emacs. However there are many other packages surrounding evil that port even greater functionality from vi to Emacs. Surround, commenting, multiple cursors and further support to other packages are configured here. *** Evil Core Setup the evil package, with some opinionated keybindings: - Switch =evil-upcase= and =evil-downcase= cos I'd rather have the non-capital one be upcase due to how much I use it - Switch =evil-goto-mark= and =evil-goto-mark-line= as I'd rather have the global one closer to the home row #+begin_src emacs-lisp (use-package evil :hook (after-init-hook . evil-mode) :general (general-def :states '(normal motion) "TAB" #'evil-jump-item "r" #'evil-replace-state "zC" #'hs-hide-level "'" #'evil-goto-mark "`" #'evil-goto-mark-line "C-w" #'evil-window-map "gu" #'evil-upcase "gU" #'evil-downcase) (general-def :states 'visual :keymaps '(emacs-lisp-mode-map lisp-interaction-mode-map) "gr" #'eval-region) (leader "w" #'evil-window-map "wd" #'delete-frame) :init (setq evil-want-keybinding nil evil-split-window-below t evil-vsplit-window-right t evil-want-abbrev-expand-on-insert-exit t evil-undo-system 'undo-tree) :config (fset #'evil-window-vsplit #'make-frame)) #+end_src *** Evil surround #+begin_src emacs-lisp (use-package evil-surround :after evil :config (global-evil-surround-mode)) #+end_src *** Evil commentary #+begin_src emacs-lisp (use-package evil-commentary :after evil :config (evil-commentary-mode)) #+end_src *** Evil mc Setup for multicursors in Evil mode. Don't let evil-mc setup it's own keymap because it uses 'gr' as its prefix, which I don't like. Instead, bind some useful functions to my personal =dx:evil-mc-map= which is bound to 'gz'. Define a function =dx:evil-mc-cursor-here= which pauses cursors upon placing a cursor at the current position. #+begin_src emacs-lisp (use-package evil-mc :after evil :bind (("M-p" . evil-mc-skip-and-goto-prev-cursor) :map dx:evil-mc-map ("q" . evil-mc-undo-all-cursors) ("d" . evil-mc-make-and-goto-next-match) ("j" . evil-mc-make-cursor-move-next-line) ("k" . evil-mc-make-cursor-move-prev-line) ("j" . evil-mc-make-cursor-move-next-line) ("m" . evil-mc-make-all-cursors) ("z" . dx:evil-mc-cursor-here) ("r" . evil-mc-resume-cursors) ("s" . evil-mc-pause-cursors)) :init (setq evil-mc-key-map nil) (define-prefix-command 'dx:evil-mc-map) (bind-key "gz" dx:evil-mc-map evil-normal-state-map) :config (global-evil-mc-mode +1) (defun dx:evil-mc-cursor-here () (interactive) (evil-mc-make-cursor-here) (evil-mc-pause-cursors))) #+end_src *** Evil collection Setup evil collection, but don't turn on the mode. Instead, I'll turn on setups for specific modes I think benefit from it. #+begin_src emacs-lisp (use-package evil-collection :after evil :config (evil-collection-require 'dired)) #+end_src ** Completion :PROPERTIES: :HTML_CONTAINER: details :END: Emacs is a text based interface. As a text based interface it heavily leverages searches and user filters to manage input and provide functionality. Though the standard model of completion may be desirable to some, it can be advanced through the use of 'completion frameworks'. These frameworks handle the input from the user for common commands and provide a differing interface to the one Emacs comes with. Most of these completion frameworks provide a text based menu that is actively filtered as more input is provided (progressive input filtering). Along with these frameworks come added functionality and applications to integrate into the Emacs environment further. One may say that when using a completion framework there is no point in using any other framework as they encompasses so much of the default functionality. This is wrong: I'd argue that with a bit of management and Emacs lisp it's totally possible to pick and mix your options. For small number selections (like finding files) use something like Ido and for something larger like searching buffers use ivy. Along with frameworks, there is a configuration for the completions-list, which is actually the original and default method of completion within Emacs. When you first install Emacs without a config, any 'completing-read' function leverages the completions-list when =TAB= is used. Though I believe Ido is a better completion system than the completions-list, it still has it's place and can be used in tandem with ido. *** Amx Amx is a fork of Smex that works to enhance the execute-extended-command interface. It also provides support for ido or ivy (though I'm likely to use ido here) and allows you to switch between them. It provides a lot of niceties such as presenting the keybind when looking for a command. #+begin_src emacs-lisp (use-package amx :config (amx-mode)) #+end_src *** Orderless Orderless sorting method for completion, probably one of the best things ever. #+begin_src emacs-lisp (use-package orderless :after (ivy ido)) #+end_src *** Ido :PROPERTIES: :header-args:emacs-lisp: :tangle no :END: Ido is a very old completion package that still works great to this day. Though it is limited in its scope (and may thus be called a completion add-on rather than a full on framework), it is still a very powerful package. With the use of ido-completing-read+, it may be used similarly to a fully fledged completion framework. #+begin_src emacs-lisp (use-package ido :demand t :general (general-def :keymaps '(ido-buffer-completion-map ido-file-completion-map ido-file-dir-completion-map ido-common-completion-map) (kbd "M-j") #'ido-next-match (kbd "M-k") #'ido-prev-match (kbd "C-x o") #'evil-window-up) :init (setq ido-decorations (list "{" "}" " \n" " ..." "[" "]" " [No match]" " [Matched]" " [Not readable]" " [Too big]" " [Confirm]") completion-styles '(flex partial-completion intials emacs22)) (setq-default ido-enable-flex-matching t ido-enable-dot-prefix t ido-enable-regexp nil) (with-eval-after-load "magit" (setq magit-completing-read-function 'magit-ido-completing-read)) :config (ido-mode) (ido-everywhere)) #+end_src **** Ido ubiquitous Ido completing-read+ is a package that extends the ido package to work with more text based functions. #+begin_src emacs-lisp (use-package ido-completing-read+ :after ido :config (ido-ubiquitous-mode +1)) #+end_src *** Completions-list #+begin_src emacs-lisp (use-package simple :straight nil :general (general-def :keymaps 'completion-list-mode-map :states '(normal motion) "l" #'next-completion "h" #'previous-completion "ESC" #'delete-completion-window "q" #'quit-window "RET" #'choose-completion) :config (with-eval-after-load "evil" (setq evil-emacs-state-modes (cl-remove-if #'(lambda (x) (eq 'completions-list-mode x)) evil-emacs-state-modes)) (add-to-list 'evil-normal-state-modes 'completions-list-mode))) #+end_src *** Ivy Ivy is a completion framework for Emacs, and my preferred (sometimes second favourite) one. It has a great set of features with little to no pain with setting up. **** Counsel Setup for counsel. Load after ivy and helpful. Along with that, set the help function and variable functions to their helpful counterparts. #+begin_src emacs-lisp (use-package counsel :commands +org/swiper-goto :general (leader "ss" #'counsel-grep-or-swiper "sr" #'counsel-rg "fr" #'counsel-recentf) :init (general-def [remap describe-bindings] #'counsel-descbinds [remap load-theme] #'counsel-load-theme) :config (setq ivy-initial-inputs-alist nil counsel-describe-function-function #'helpful-callable counsel-describe-variable-function #'helpful-variable ivy-re-builders-alist '((swiper . ivy--regex-plus) (counsel-grep-or-swiper . ivy--regex-plus) (counsel-rg . ivy--regex-plus) (t . orderless-ivy-re-builder))) (with-eval-after-load "org-mode" (general-def [remap org-goto] #'counsel-org-goto)) (counsel-mode)) #+end_src **** Ivy Core Setup for ivy, in preparation for counsel. Turn on ivy-mode just after init. Setup vim-like bindings for the minibuffer ("C-(j|k)" for down|up the selection list). #+begin_src emacs-lisp (use-package ivy :hook (after-init-hook . ivy-mode) :general (general-def :keymaps 'ivy-minibuffer-map "C-j" #'ivy-yank-symbol "M-j" #'ivy-next-line-or-history "M-k" #'ivy-previous-line-or-history "C-c C-e" #'ivy-occur) (general-def :keymaps 'ivy-switch-buffer-map "M-j" #'ivy-next-line-or-history "M-k" #'ivy-previous-line-or-history) :config (require 'counsel nil t) (setq ivy-height 10 ivy-wrap t ivy-fixed-height-minibuffer t ivy-use-virtual-buffers nil ivy-virtual-abbreviate 'full ivy-on-del-error-function #'ignore ivy-use-selectable-prompt t) (with-eval-after-load "amx" (setq amx-backend 'ivy))) #+end_src **** Counsel etags :PROPERTIES: :header-args:emacs-lisp: :tangle no :END: Counsel etags allows me to search generated tag files for tags. I already have a function defined to generate the tags, so it's just searching them which I find to be a bit of a hassle, and where this package comes in. #+begin_src emacs-lisp (use-package counsel-etags :after counsel :general (leader "st" #'counsel-etags-find-tag)) #+end_src *** Company Company is the auto complete system I use. I don't like having heavy setups for company as it only makes it slower to use. In this case, just setup some evil binds for company. #+begin_src emacs-lisp (use-package company :hook (prog-mode-hook . company-mode) (eshell-mode-hook . company-mode) :general (general-def :states 'insert (kbd "C-SPC") #'company-complete) (general-def :states '(normal insert) "M-j" #'company-select-next "M-k" #'company-select-previous)) #+end_src ** Pretty symbols :PROPERTIES: :HTML_CONTAINER: details :END: Prettify symbols mode allows for users to declare 'symbols' that replace text within certain modes. For example, you may replace the 'for' word in c-mode in trade of the logical symbol for [[https://en.wikipedia.org/wiki/Universal_quantification][universal quantification]]. Though this may seem like useless eye candy, it has aided my comprehension and speed of recognition (recognising symbols is easier than words for many, including me). Now here I provide a macro +pretty/set-alist. This macro works pretty simply: given a mode hook, as well as a list of pairs typed (text to substitute, symbol to replace with). Then I add a hook to the given mode, setting the prettify-symbols-alist to the symbols given. I've declared it pretty high up into my config so that the rest of my packages can leverage it. #+begin_src emacs-lisp (use-package prog-mode :straight nil :init (setq prettify-symbols-unprettify-at-point t) :config (with-eval-after-load "use-package-core" (add-to-list 'use-package-keywords ':pretty) (defun use-package-normalize/:pretty (_name-symbol _keyword args) args) (defun use-package-handler/:pretty (name _keyword args rest state) (use-package-concat (use-package-process-keywords name rest state) (let ((arg args) forms) (while arg (let* ((carg (car arg)) (mode (car carg)) (rest (cdr carg))) (add-to-list 'forms `(add-hook ',mode (lambda () (setq prettify-symbols-alist ',rest) (prettify-symbols-mode))))) (setq arg (cdr arg))) forms)))) (defmacro +pretty/set-alist (mode &rest symbols) `(add-hook ',mode (lambda () (setq prettify-symbols-alist ',symbols) (prettify-symbols-mode)))) (defun +pretty/set-alist-f (mode symbols) `(+pretty/set-alist mode ,@symbols))) #+end_src Here's a collection of symbols I have currently that may be used later. #+begin_example ("null" . "∅") ("list" . "ℓ") ("string" . "𝕊") ("true" . "⊤") ("false" . "⊥") ("char" . "ℂ") ("int" . "ℤ") ("float" . "ℝ") ("!" . "¬") ("&&" . "∧") ("||" . "∨") ("for" . "∀") ("return" . "⟼") ("print" . "ℙ") ("lambda" . "λ") #+end_example ** Window management :PROPERTIES: :HTML_CONTAINER: details :END: Window management is really important. I find the default window handling of Emacs incredibly annoying: sometimes consuming my windows, sometimes creating new ones. Of course, as Emacs is a powerful lisp interpreter, this is easily manageable. Here I create a few use-package extensions that manages the whole ordeal of adding a new record to the display-buffer-alist, a useful abstraction that makes it easy to manage the various buffers created by packages. #+begin_src emacs-lisp (use-package window :straight nil :defer t :general (leader :infix "b" "b" #'switch-to-buffer "K" #'kill-buffer "j" #'next-buffer "k" #'previous-buffer) :init (with-eval-after-load "use-package-core" (add-to-list 'use-package-keywords ':display) (defun use-package-normalize/:display (_name-symbol _keyword args) args) (defun use-package-handler/:display (name _keyword args rest state) (use-package-concat (use-package-process-keywords name rest state) (let ((arg args) forms) (while arg (add-to-list 'forms `(add-to-list 'display-buffer-alist ',(car arg))) (setq arg (cdr arg))) forms))))) #+end_src *** Setup default display records Using the =:display= keyword, setup up some =display-buffer-alist= records. #+begin_src emacs-lisp (use-package window :straight nil :defer t :display ("\\*\\(Wo\\)?Man.*" (display-buffer-at-bottom) (window-height . 0.25)) ("\\*Process List\\*" (display-buffer-at-bottom) (window-height . 0.25)) ("\\*compilation\\*" (display-buffer-at-bottom) (window-height . 0.25)) ("\\*\\(Ido \\)?Completions\\*" (display-buffer-in-side-window) (window-height . 0.25) (side . bottom)) ("\\*Async Shell Command\\*" (display-buffer-at-bottom) (window-height . 0.25))) #+end_src ** Auto typing :PROPERTIES: :HTML_CONTAINER: details :END: Snippets are a system by which pieces of code can be inserted via prefixes. For example, an 'if' snippet would work by first inserting the word 'if' then pressing some _expansion key_ such as TAB. This will insert a set of text that may be have some components that need to be further filled by the user. The popular solution is Yasnippet. Yasnippet is a great package for snippets, which I use heavily in programming and org-mode. I setup here the global mode for yasnippet and a collection of snippets for ease of use. However, Emacs provides its own 'auto typing' facilities. Abbrevs and skeletons make up the popular solution within Emacs default. Abbrevs are for simple expressions wherein there is only one user input (say, getting today's time which only requires you asking for it). They provide a lot of inbuilt functionality and are quite useful. Skeletons, on the other hand, are for higher level insertions *** Abbrevs Just define a few abbrevs for various date-time operations. Also define a macro that will assume a function for the expansion, helping with abstracting a few things away. #+begin_src emacs-lisp (use-package abbrev :straight nil :hook (prog-mode-hook . abbrev-mode) (text-mode-hook . abbrev-mode) :init (defmacro +autotyping/deff-abbrev (ABBREV-TABLE ABBREV EXPANSION) "Wraps around define-abbrev to fill in some repeated stuff when expansion is a function." `(define-abbrev ,ABBREV-TABLE ,ABBREV "" (proc (insert ,EXPANSION)))) :config (+autotyping/deff-abbrev global-abbrev-table "sdte" (format-time-string "%Y-%m-%d" (current-time))) (+autotyping/deff-abbrev global-abbrev-table "stme" (format-time-string "%H:%M:%S" (current-time))) (+autotyping/deff-abbrev text-mode-abbrev-table "sday" (format-time-string "%A" (current-time))) (+autotyping/deff-abbrev text-mode-abbrev-table "smon" (format-time-string "%B" (current-time)))) #+end_src *** Skeletons Defining some basic skeletons and a macro to help generate an abbrev as well. #+begin_src emacs-lisp (use-package skeleton :straight nil :after abbrev :config (defmacro +autotyping/gen-skeleton-abbrev (mode abbrev &rest skeleton) (let* ((table (intern (concat (symbol-name mode) "-abbrev-table"))) (skeleton-name (intern (concat "+skeleton/" (symbol-name mode) "/" abbrev)))) `(progn (define-skeleton ,skeleton-name "" ,@skeleton) (define-abbrev ,table ,abbrev "" ',skeleton-name))))) #+end_src *** Auto insert #+begin_src emacs-lisp (use-package autoinsert :straight nil :hook (after-init-hook . auto-insert-mode) :config (add-to-list 'auto-insert-alist '(("\\.html\\'" . "HTML Skeleton") "" " "(read-string "Enter title: ") | """ " _ " "))) #+end_src *** Yasnippet default Setup global mode after evil mode has been loaded #+begin_src emacs-lisp (use-package yasnippet :after evil :hook (prog-mode-hook . yas-minor-mode) (text-mode-hook . yas-minor-mode) :general (leader "i" #'yas-insert-snippet) :config (yas-load-directory (no-littering-expand-etc-file-name "yasnippet/snippets"))) #+end_src ** Emacs Mode-line :PROPERTIES: :HTML_CONTAINER: details :header-args:emacs-lisp: :tangle no :END: Firstly, declare a variable for the separator between each module #+begin_src emacs-lisp (defconst +modeline/separator " " "Separator between modules.") #+end_src Then declare a variable for the number of separators between each module in the modeline. #+begin_src emacs-lisp (defconst +modeline/sep-count 4 "Number of +modline/separator instances separating modules.") #+end_src Then, declare a list of reserved characters for which the previously declared seperator won't be applied when placed at the end of a module string. #+begin_src emacs-lisp (defconst +modeline/reserved-chars (list "[" "(") "Characters that, when at the end of a module string, won't have the separator applied to them.") #+end_src Now declare a function that applies the separator with respect to the reserved characters to any one string. #+begin_src emacs-lisp (defun +modeline/handle-string (STR) (condition-case nil (progn (string-blank-p STR) (cond ((cl-member (car (last (split-string STR "" t))) +modeline/reserved-chars :test #'string=) STR) (t (concat STR (cl-reduce #'concat (cl-loop for i from 1 to +modeline/sep-count collect +modeline/separator)))))) (error STR))) #+end_src Finally, set the mode-line-format. #+begin_src emacs-lisp (setq-default mode-line-format (mapcar #'+modeline/handle-string (list "%l:%c" "%p[" '(:eval (upcase (substring (format "%s" (if (bound-and-true-p evil-state) evil-state "")) 0 1))) "]" "%+%b(" '(:eval (format "%s" major-mode)) ")" "%I" vc-mode mode-line-end-spaces))) #+end_src ** Telephone-line Telephone-line is a mode-line package for Emacs which prioritises extensibility. It also looks much nicer than the default mode line with colouring and a ton of presentations to choose from. #+begin_src emacs-lisp (use-package telephone-line :init (defface +telephone/position-face '((t (:foreground "red" :background "grey10"))) "") (defface +telephone/mode-face '((t (:foreground "white" :background "dark green"))) "") (defface +telephone/file-info-face '((t (:foreground "white" :background "Dark Blue"))) "") :custom (telephone-line-faces '((evil . telephone-line-modal-face) (modal . telephone-line-modal-face) (ryo . telephone-line-ryo-modal-face) (accent . (telephone-line-accent-active . telephone-line-accent-inactive)) (nil . (mode-line . mode-line-inactive)) (position . (+telephone/position-face . mode-line-inactive)) (mode . (+telephone/mode-face . mode-line-inactive)) (file-info . (+telephone/file-info-face . mode-line-inactive)))) (telephone-line-primary-left-separator 'telephone-line-halfcos-left) (telephone-line-secondary-left-separator 'telephone-line-halfcos-hollow-left) (telephone-line-primary-right-separator 'telephone-line-identity-right) (telephone-line-secondary-right-separator 'telephone-line-identity-hollow-right) (telephone-line-height 24) (telephone-line-evil-use-short-tag nil) :config (telephone-line-defsegment +telephone/buffer-or-filename () (cond ((buffer-file-name) (if (and (fboundp 'projectile-project-name) (fboundp 'projectile-project-p) (projectile-project-p)) (list "" (funcall (telephone-line-projectile-segment) face) (propertize (concat "/" (file-relative-name (file-truename (buffer-file-name)) (projectile-project-root))) 'help-echo (buffer-file-name))) (buffer-file-name))) (t (buffer-name)))) (telephone-line-defsegment +telephone/get-position () `(,(concat "%lL:%cC" (if (not mark-active) "" (format " | %dc" (- (+ 1 (region-end)) (region-beginning))))))) (setq-default telephone-line-lhs '((mode telephone-line-major-mode-segment) (file-info telephone-line-input-info-segment) (position +telephone/get-position) (accent +telephone/buffer-or-filename telephone-line-process-segment)) telephone-line-rhs '((accent telephone-line-flycheck-segment telephone-line-misc-info-segment telephone-line-projectile-segment) (file-info telephone-line-filesize-segment) (evil telephone-line-evil-tag-segment))) (telephone-line-mode)) #+end_src * Small packages :PROPERTIES: :HTML_CONTAINER: details :END: ** ISearch #+begin_src emacs-lisp (use-package isearch :straight nil :general (:keymaps 'isearch-mode-map "M-s" #'isearch-repeat-forward)) #+end_src ** Display line numbers I don't like using this mode by default, but I'd like to configure it if possible. Line numbers are a necessary evil a lot of times, and it's useful for presentations. #+begin_src emacs-lisp (use-package display-line-numbers :straight nil :defer t :commands display-line-numbers-mode :general (leader "tl" #'display-line-numbers-mode) :init (setq-default display-line-numbers-type 'relative)) #+end_src ** Hl-line Hl-line is a #+begin_src emacs-lisp (use-package hl-line :hook (text-mode-hook . hl-line-mode)) #+end_src ** Projectile Setup projectile, along with the tags command. Also bind "C-c C-p" to the projectile command map for quick access. #+begin_src emacs-lisp (use-package projectile :after evil :hook (prog-mode-hook . projectile-mode) :general (leader "p" #'projectile-command-map) :init (setq projectile-tags-command "ctags -Re -f \"%s\" %s \"%s\"") :config (projectile-mode)) #+end_src *** Counsel projectile :PROPERTIES: :header-args:emacs-lisp: :tangle no :END: Counsel projectile provides the ivy interface to projectile commands, which is really useful. #+begin_src emacs-lisp (use-package counsel-projectile :after (projectile counsel) :config (counsel-projectile-mode +1)) #+end_src ** Hydra Use hydras for stuff that I use often, currently buffer manipulation #+begin_src emacs-lisp (use-package hydra :after evil :init (defun dx:kill-defun () "Mark defun then kill it." (interactive) (mark-defun) (delete-active-region t)) (defun dx:paste-section () "Paste the current kill-region content above section." (interactive) (open-line 1) (yank)) :config (defhydra hydra-buffer (evil-normal-state-map "SPC b") "buffer-hydra" ("l" next-buffer) ("h" previous-buffer) ("c" kill-this-buffer)) (defhydra hydra-goto-chg (evil-normal-state-map "g;") "goto-chg" (";" goto-last-change "goto-last-change") ("," goto-last-change-reverse "goto-last-change-reverse")) (defhydra hydra-code-manipulator (global-map "C-x c") "code-manip" ("j" evil-forward-section-begin) ("k" evil-backward-section-begin) ("m" mark-defun) ("d" dx:kill-defun) ("p" dx:paste-section) ("TAB" evil-toggle-fold))) #+end_src ** Avy Setup avy with leader. As I use =avy-goto-char-timer= a lot, use the =C-s= bind which replaces isearch. Switch isearch to M-s in case I need to use it. #+begin_src emacs-lisp (use-package avy :after evil :general (leader :infix "s" "l" #'avy-goto-line) (general-def :states '(normal motion) (kbd "C-s") #'avy-goto-char-timer (kbd "M-s") #'isearch-forward)) #+end_src ** Ace window Though evil provides a great many features in terms of window management, much greater than what's easily available in Emacs, ace window can provide some nicer chords for higher management of windows (closing, switching, etc). #+begin_src emacs-lisp (use-package ace-window :after evil :custom (aw-keys '(?a ?s ?d ?f ?g ?h ?j ?k ?l)) :general (general-def :states '(normal motion) [remap evil-window-next] #'ace-window)) #+end_src ** Helpful Basic setup that replaces commands and configures =display-buffer-alist= for helpful. #+begin_src emacs-lisp (use-package helpful :commands (helpful-callable helpful-variable) :general (general-def [remap describe-function] #'helpful-callable [remap describe-variable] #'helpful-variable [remap describe-key] #'helpful-key) :display ("\\*[Hh]elp.*" (display-buffer-at-bottom) (inhibit-duplicate-buffer . t) (window-height . 0.25)) :config (evil-define-key 'normal helpful-mode-map "q" #'quit-window)) #+end_src ** Which-key Pretty simple, just activate after init. #+begin_src emacs-lisp (use-package which-key :config (which-key-mode)) #+end_src ** Keychord Keychord is only really here for this one chord I wish to define: "jk" for exiting insert state. Otherwise, I don't really need it. #+begin_src emacs-lisp (use-package key-chord :after evil :config (key-chord-define evil-insert-state-map "jk" #'evil-normal-state) (key-chord-mode +1)) #+end_src ** (Rip)grep :PROPERTIES: :HTML_CONTAINER: details :END: Grep is likely one of the most important programs ever invented; a must-have tool for any Linux users inventory. It is a searching utility that allows one to search files for certain regex patterns. The fact that there have been so many attempts to replace grep (with limited success) only goes to show how important its general function is to people. Ripgrep is a grep-like utility written in Rust. It subsumes not only the ability to search a given file but also to search multiple files within a directory (which is usually only done by composing the program find with grep to search multiple files). It is incredibly fast by virtue of its regex optimisations and the use of ignore files such as =.gitignore= to filter files when searching. Grep has default Emacs utilities that use a =compilation= style buffer to search a variety of differing data sets. =grep= searches files, =rgrep= searches in a directory using the =find= binary and =zgrep= searches archives. This is a great solution for most computer environments as basically all of them will have grep and find installed. Even when you =ssh= into a remote machine, they're likely to have these tools. The ripgrep package provides utilities to ripgrep projects and files for strings via the rg binary. Though [[*Ivy][ivy]] comes with =counsel-rg= using it makes me dependent on the ivy framework, and this configuration is intentionally built to be modular and switchable. Of course, this requires installing the rg binary which is available in most repositories nowadays. *** Grep #+begin_src emacs-lisp (use-package grep :display ("grep\\*" (display-buffer-at-bottom) (window-height . 0.25)) :straight nil :general (leader "sd" #'rgrep)) #+end_src *** rg #+begin_src emacs-lisp (use-package rg :commands (+rg/search-in-new-frame) :general (leader "sr" #'rg "sR" #'+rg/search-in-new-frame) (:keymaps 'rg-mode-map "]]" #'rg-next-file "[[" #'rg-prev-file "q" #'quit-window) :init (setq rg-group-result t rg-hide-command t rg-show-columns nil rg-show-header t rg-custom-type-aliases nil rg-default-alias-fallback "all" rg-buffer-name "*ripgrep*") :config (defun +rg/search-in-new-frame () (interactive) (let ((frame (make-frame))) (select-frame frame) (call-interactively #'rg)))) #+end_src * Applications :PROPERTIES: :HTML_CONTAINER: details :END: ** Dashboard Dashboard creates a custom dashboard for Emacs that replaces the initial startup screen in default Emacs. #+begin_src emacs-lisp (use-package dashboard :straight t :general (leader "ab" #'dashboard-refresh-buffer) (general-def :states '(normal motion emacs) :keymaps 'dashboard-mode-map "q" (proc (interactive) (kill-this-buffer))) :init (setq dashboard-banner-logo-title "Oreomacs" dashboard-center-content nil dashboard-set-init-info t dashboard-startup-banner (no-littering-expand-etc-file-name "dashboard/logo.png") dashboard-set-footer t dashboard-set-navigator t dashboard-items '((projects . 5) (recents . 5))) :config (dashboard-setup-startup-hook) (setq initial-buffer-choice (lambda () (get-buffer "*dashboard*"))) (general-def :states '(normal motion) :keymaps 'dashboard-mode-map "r" #'dashboard-jump-to-recent-files "p" #'dashboard-jump-to-projects "}" #'dashboard-next-section "{" #'dashboard-previous-section)) #+end_src ** EWW #+begin_src emacs-lisp (use-package eww :straight nil :config (with-eval-after-load "evil-collection" (evil-collection-eww-setup))) #+end_src ** Calendar Calendar is a simple inbuilt application within Emacs that helps with date functionalities. I add functionality to copy dates from the calendar to the kill ring and bind it to "Y". #+begin_src emacs-lisp (use-package calendar :straight nil :defer t :commands (+calendar/copy-date +calendar/toggle-calendar) :display ("\\*Calendar\\*" (display-buffer-at-bottom) (inhibit-duplicate-buffer . t) (window-height . 0.17)) :general (:keymaps 'calendar-mode-map :states '(normal motion) "Y" #'+calendar/copy-date) (leader "ad" #'+calendar/toggle-calendar) :config (defun +calendar/copy-date () "Copy date under cursor into kill ring." (interactive) (if (use-region-p) (call-interactively #'kill-ring-save) (let ((date (calendar-cursor-to-date))) (when date (setq date (encode-time 0 0 0 (nth 1 date) (nth 0 date) (nth 2 date))) (kill-new (format-time-string "%Y-%m-%d" date)))))) (+dx/create-toggle-function +calendar/toggle-calendar "*Calendar*" calendar)) #+end_src ** Mail :PROPERTIES: :HTML_CONTAINER: details :END: Mail is a funny thing; most people use it just for business or advertising and it's come out of use in terms of personal communication in the west for the most part (largely due to "social" media applications). However, this isn't true for the open source and free software movement who heavily use mail for communication. Integrating mail into Emacs helps as I can send source code and integrate it into my workflow just a bit better. *** Notmuch #+begin_src emacs-lisp (defconst +mail/signature "---------------\nAryadev Chavali") (defconst +mail/local-dir (concat user-emacs-directory ".mail/")) (use-package notmuch :commands notmuch :general (leader "am" #'notmuch) :init (defun +mail/sync-mail () "Sync mail via mbsync." (interactive) (start-process-shell-command "" nil "mbsync -a")) (defun +mail/trash-junk () "Delete any mail in junk" (interactive) (start-process-shell-command "" nil "notmuch search --output=files --format=text0 tag:deleted tag:spam tag:trash tag:junk | xargs -r0 rm")) :custom (notmuch-show-logo nil) (notmuch-search-oldest-first nil) (notmuch-hello-sections '(notmuch-hello-insert-saved-searches notmuch-hello-insert-alltags)) (notmuch-archive-tags '("-inbox" "-unread" "+archive")) (mail-signature +mail/signature) (mail-default-directory +mail/local-dir) (mail-source-directory +mail/local-dir) (message-signature +mail/signature) (message-auto-save-directory +mail/local-dir) (message-directory +mail/local-dir) :config ;; sync mail after refresh (advice-add #'notmuch-poll-and-refresh-this-buffer :before #'+mail/sync-mail) (advice-add #'notmuch-poll-and-refresh-this-buffer :after #'+mail/trash-junk) (with-eval-after-load "evil-collection" (evil-collection-notmuch-setup))) #+end_src *** Smtpmail #+begin_src emacs-lisp (use-package smtpmail :after notmuch :commands mail-send :custom (smtpmail-smtp-server "mail.aryadevchavali.com") (smtpmail-smtp-user "aryadev") (smtpmail-smtp-service 587) (smtpmail-stream-type 'starttls) :init (setq send-mail-function #'smtpmail-send-it message-send-mail-function #'smtpmail-send-it)) #+end_src ** Dired :PROPERTIES: :HTML_CONTAINER: details :END: Setup for dired. Make dired-hide-details-mode the default mode when using dired-mode, as it removes the clutter. Setup evil collection for dired (even though dired doesn't really conflict with evil, there are some corners I'd like to adjust). #+begin_src emacs-lisp (use-package dired :straight nil :hook (dired-mode-hook . dired-hide-details-mode) (dired-mode-hook . auto-revert-mode) :init (setq-default dired-listing-switches "-AFBl --group-directories-first") :general (leader :infix "d" "f" #'find-dired "D" #'dired-other-frame "d" #'dired-jump "l" (proc (interactive) (find-dired "~/Text/PDFs/" "-iname 'cs[0-9][0-9][0-9].pdf' -or -iname 'ma[0-9][0-9][0-9]*.pdf'"))) :config (with-eval-after-load "evil-collection" (evil-collection-dired-setup)) (defun +dired/display-thumb-or-file () "If the file under point is a image file then display a thumb, otherwise open the file." (interactive) (let* ((filename (dired-get-filename)) (ext (file-name-extension filename))) (if (or (string= ext "png") (string= ext "jpg") (string= ext "jpeg") (string= ext "gif")) (image-dired-display-thumb) (find-file-other-frame filename)))) (general-def :states '(normal motion) :keymaps 'dired-mode-map "SPC" nil "SPC ," nil) (local-leader :keymaps 'dired-mode-map "l" #'dired-maybe-insert-subdir "u" #'dired-undo "i" #'+dired/display-thumb-or-file)) #+end_src ** Xwidget :PROPERTIES: :HTML_CONTAINER: details :END: Xwidget is a package (must be compiled at source) which allows for the insertion of arbitrary xwidgets into Emacs through buffers. One of its premier uses is in navigating the web which it provides through the function =xwidget-webkit-browse-url=. This renders a fully functional web browser within Emacs. Though I am not to keen on using Emacs to browse the web /via/ xwidget (EWW does a good job on its own), I am very interested in its capability to render full fledged web pages which include JavaScript, as it may come of use when doing web development. I can see the results of work very quickly without switching windows or workspaces. *** Xwidget Core #+begin_src emacs-lisp (use-package xwidget :straight nil :display ("\\*xwidget.*" (display-buffer-pop-up-frame)) :general (leader "au" #'xwidget-webkit-browse-url) (general-def :states '(normal motion) :keymaps 'xwidget-webkit-mode-map "q" #'quit-window "h" #'xwidget-webkit-scroll-backward "j" #'xwidget-webkit-scroll-up "k" #'xwidget-webkit-scroll-down "l" #'xwidget-webkit-scroll-forward "+" #'xwidget-webkit-zoom-in "-" #'xwidget-webkit-zoom-out (kbd "C-f") #'xwidget-webkit-scroll-up (kbd "C-b") #'xwidget-webkit-scroll-down "H" #'xwidget-webkit-back "L" #'xwidget-webkit-forward "gu" #'xwidget-webkit-browse-url "gr" #'xwidget-webkit-reload "gg" #'xwidget-webkit-scroll-top "G" #'xwidget-webkit-scroll-bottom)) #+end_src *** Xwidget Extensions Define a function =+xwidget/render-file= that reads a file name and presents it in an xwidget. If the current file is an HTML file, ask if user wants to open current file. Bind it to =aU= in the leader. Also define a function =+xwidget/search-query= that first asks the user what search engine they want to use ([[https://duckduckgo.com][Duck Duck Go]] and [[https://devdocs.io][DevDocs]] currently) then asks for a query, which it parses then presents in an xwidget window. Bind to =as= in the leader. #+begin_src emacs-lisp (use-package xwidget :straight nil :commands (+xwidget/render-file +xwidget/search) :general (leader "aU" #'+xwidget/render-file "as" #'+xwidget/search) :config (defun +xwidget/render-file (&optional FORCE) "Find file (or use current file) and render in xwidget." (interactive) (cond ((and (not FORCE) (or (string= (replace-regexp-in-string ".*.html" "html" (buffer-name)) "html") (eq major-mode 'web-mode) (eq major-mode 'html-mode))) ; If in html file (if (y-or-n-p "Open current file?: ") ; Maybe they want to open a separate file (xwidget-webkit-browse-url (format "file://%s" (buffer-file-name))) (+xwidget/render-file t))) ; recurse and open file via prompt (t (xwidget-webkit-browse-url (format "file://%s" (read-file-name "Enter file to open: ")))))) (defun +xwidget/search () "Run a search query on some search engine and display in xwidget." (interactive) (let* ((engine (completing-read "Engine: " '("duckduckgo.com" "devdocs.io") nil t)) (query-raw (read-string "Enter query: ")) (query (cond ((string= engine "duckduckgo.com") query-raw) ((string= engine "devdocs.io") (concat "_ " query-raw))))) (xwidget-webkit-browse-url (concat "https://" engine "/?q=" query))))) #+end_src ** Eshell :PROPERTIES: :HTML_CONTAINER: details :END: Eshell is the integrated shell environment for Emacs. Though it isn't necessarily *the best* shell, it really suits the 'integrated computing environment' moniker that Emacs gets. It may be argued that Emacs integrates within itself many of the functionalities that one would use within a shell or terminal. Stuff like compilation, file management, large scale text manipulation could be done through Emacs' own tools (=compile=, =dired= and =occur= come to mind). However, I'd argue that eshell's greatest ability comes from it's separation (or perhaps better phrased, *integration*) of two 'parsers': the Lisp parser and the Shell parser. With these parsers you can mix and match at will for use in the shell, which grants greater power than many shells I know of. *** Eshell Core Setup a function that /toggles/ the eshell window rather than just opening it via =+dx/toggle-buffer=. Along with that setup the prompt so it looks a bit nicer and add pretty symbols to eshell. #+begin_src emacs-lisp (use-package eshell :commands +shell/toggle-shell :display ("\\*e?shell\\*" ; for general shells as well (display-buffer-at-bottom) (window-height . 0.25)) :pretty (eshell-mode-hook ("lambda" . "λ") ("numberp" . "ℤ") ("t" . "⊤") ("nil" . "∅")) :general (leader "tt" #'+shell/toggle-eshell) :init (add-hook 'eshell-mode-hook (proc (interactive) (general-def :states '(insert normal) :keymaps 'eshell-mode-map "M-l" (proc (interactive) (eshell/clear) "M-j" #'eshell-next-matching-input-from-input "M-k" #'eshell-previous-matching-input-from-input) (local-leader :keymaps 'eshell-mode-map "c" (proc (interactive) (eshell/clear) (recenter)) "k" #'eshell-kill-process)))) :config (setq eshell-cmpl-ignore-case t eshell-cd-on-directory t eshell-prompt-function (proc (concat (format "[%s]\n" (abbreviate-file-name (eshell/pwd))) "λ ")) eshell-prompt-regexp "^λ ") (+dx/create-toggle-function +shell/toggle-eshell "*eshell*" eshell)) #+end_src ** Elfeed :PROPERTIES: :HTML_CONTAINER: details :END: Elfeed is the perfect RSS feed reader, integrated into Emacs perfectly. I've got a set of feeds that I use for a large variety of stuff, mostly media and entertainment. I've also bound " ar" to elfeed for loading the system. #+begin_src emacs-lisp (use-package elfeed :general (leader "ar" #'elfeed) (general-def :states '(normal motion) :keymaps 'elfeed-search-mode-map "gr" #'elfeed-update "s" #'elfeed-search-live-filter "" #'elfeed-search-show-entry) :init (setq elfeed-db-directory (no-littering-expand-var-file-name "elfeed/")) (setq +rss/feed-urls '(("Arch Linux" "https://www.archlinux.org/feeds/news/" Linux) ("LEMMiNO" "https://www.youtube.com/feeds/videos.xml?channel_id=UCRcgy6GzDeccI7dkbbBna3Q" YouTube Stories) ("The Onion" "https://www.theonion.com/rss" Social) ("Dark Sominium" "https://www.youtube.com/feeds/videos.xml?channel_id=UC_e39rWdkQqo5-LbiLiU10g" YouTube Stories) ("Dark Sominium Music" "https://www.youtube.com/feeds/videos.xml?channel_id=UCkLiZ_zLynyNd5fd62hg1Kw" YouTube Music) ("Nexpo" "https://www.youtube.com/feeds/videos.xml?channel_id=UCpFFItkfZz1qz5PpHpqzYBw" YouTube) ("Techquickie" "https://www.youtube.com/feeds/videos.xml?channel_id=UC0vBXGSyV14uvJ4hECDOl0Q" YouTube) ("3B1B" "https://www.youtube.com/feeds/videos.xml?channel_id=UCYO_jab_esuFRV4b17AJtAw" YouTube) ("Fredrik Knusden" "https://www.youtube.com/feeds/videos.xml?channel_id=UCbWcXB0PoqOsAvAdfzWMf0w" YouTube Stories) ("Barely Sociable" "https://www.youtube.com/feeds/videos.xml?channel_id=UC9PIn6-XuRKZ5HmYeu46AIw" YouTube Stories) ("Atrocity Guide" "https://www.youtube.com/feeds/videos.xml?channel_id=UCn8OYopT9e8tng-CGEWzfmw" YouTube Stories) ("Hacker News" "http://morss.aryadevchavali.com/news.ycombinator.com/rss" Social) ("Hacker Factor" "https://www.hackerfactor.com/blog/index.php?/feeds/index.rss2" Social) ("BBC Top News" "http://morss.aryadevchavali.com/feeds.bbci.co.uk/news/rss.xml" News) ("BBC Tech News" "http://morss.aryadevchavali.com/feeds.bbci.co.uk/news/technology/rss.xml" News))) :config (with-eval-after-load "evil-collection" (evil-collection-elfeed-setup)) (setq elfeed-feeds (cl-map 'list #'(lambda (item) (append (list (nth 1 item)) (cdr (cdr item)))) +rss/feed-urls))) #+end_src ** Magit Magit is *the* git porcelain for Emacs, which perfectly encapsulates the git cli. In this case, I just need to setup the bindings for it. As magit will definitely load after evil (as it must be run by a binding, and evil will load after init), I can use evil-collection freely. Also, define an auto insert for commit messages so that I don't need to write everything myself. #+begin_src emacs-lisp (use-package magit :display ("magit:.*" (display-buffer-same-window) (inhibit-duplicate-buffer . t)) ("magit-diff:.*" (display-buffer-below-selected)) ("magit-log:.*" (display-buffer-same-window)) :general (leader "g" #'magit-status) :init (setq vc-follow-symlinks t) (with-eval-after-load "autoinsert" (define-auto-insert '("COMMIT_EDITMSG" , "Commit") '(nil "(" (read-string "Enter feature/module: ") ")" (read-string "Enter simple description: ") "\n\n" _))) :config (with-eval-after-load "evil-collection" (evil-collection-magit-setup))) #+end_src ** IBuffer #+begin_src emacs-lisp (use-package ibuffer :general (leader "bi" #'ibuffer) :config (with-eval-after-load "evil-collection" (evil-collection-ibuffer-setup))) #+end_src ** Processes :PROPERTIES: :HTML_CONTAINER: details :END: Emacs has two systems for process management: + proced: a general 'top' like interface which allows general management of linux processes + list-processes: a specific Emacs based system that lists processes spawned by Emacs (similar to a top for Emacs specifically) *** Proced Core proced config, just a few bindings and evil collection setup. #+begin_src emacs-lisp (use-package proced :straight nil :general (leader "ap" #'proced) (general-def :states 'normal :keymaps 'proced-mode-map "za" #'proced-toggle-auto-update) :display ("\\*Proced\\*" (display-buffer-at-bottom) (window-height . 0.25)) :init (setq proced-auto-update-interval 0.5) :config (with-eval-after-load "evil-collection" (evil-collection-proced-setup))) #+end_src Along with that I setup the package =proced-narrow= which allows further filtering of the process list. #+begin_src emacs-lisp (use-package proced-narrow :straight t :after proced :general (general-def :states 'normal :keymaps 'proced-mode-map "%" #'proced-narrow)) #+end_src ** Calculator :PROPERTIES: :HTML_CONTAINER: details :END: Surprise, surprise Emacs comes with a calculator. At this point there is little that surprises me in terms of Emacs' amazing capabilities. =calc-mode= is a calculator system within Emacs that provides a diverse array of mathematical operations. It uses reverse polish notation to do calculations (though there is a standard infix algebraic notation mode) and provides incredible utilities. #+begin_src emacs-lisp (use-package calc :straight nil :display ("*Calculator*" (display-buffer-at-bottom) (window-height . 0.18)) :general (leader "ac" #'calc) :init (setq calc-algebraic-mode t) :config (with-eval-after-load "evil-collection" (evil-collection-calc-setup))) #+end_src *** Calctex =calc-mode= also has a 3rd party package called =calctex=. It renders mathematical expressions within calc as if they were rendered in TeX. You can also copy the expressions in their TeX forms, which is pretty useful when writing a paper. I've set a very specific lock on this repository as it's got quite a messy work-tree and this commit seems to work for me given the various TeX utilities installed via Arch. #+begin_src emacs-lisp (use-package calctex :after calc :straight (calctex :type git :host github :repo "johnbcoughlin/calctex") :hook (calc-mode-hook . calctex-mode)) #+end_src ** Ledger #+begin_src emacs-lisp (use-package ledger-mode :defer t) (use-package evil-ledger :after ledger-mode) #+end_src * Major modes, programming and text :PROPERTIES: :HTML_CONTAINER: details :END: Setups for common major modes and languages. ** Text Configuration :PROPERTIES: :HTML_CONTAINER: details :END: Standard packages and configurations for the text-mode. *** Flyspell Flyspell allows me to quickly spell check text documents. I use flyspell primarily in org mode, as that is my preferred prose writing software, but I also need it in commit messages and so on. So flyspell-mode should be hooked to text-mode. #+begin_src emacs-lisp (use-package flyspell :hook (text-mode-hook . flyspell-mode) :general (general-def :states '(normal motion) :keymaps 'text-mode-map (kbd "M-a") #'flyspell-correct-word-before-point (kbd "M-A") #'flyspell-auto-correct-word)) #+end_src *** Undo tree Undo tree is a system for handling the history of any buffer. It provides a very nice 'tree' visualiser (hence the name) for revisions of a file or buffer, and allows you to move around different verisons at once, without using a VCS like git (all in Emacs, baby). #+begin_src emacs-lisp (use-package undo-tree :straight t :hook (emacs-startup-hook . global-undo-tree-mode)) #+end_src *** White space Deleting whitespace, highlighting when going beyond the 80th character limit, all good stuff. I don't want to highlight whitespace for general mode categories (Lisp shouldn't really have an 80 character limit), so set it for specific modes need the help. #+begin_src emacs-lisp (use-package whitespace :straight nil :general (general-def :states '(normal motion) "M--" #'whitespace-cleanup) :hook (before-save-hook . whitespace-cleanup) (c-mode-hook . whitespace-mode) (c++-mode-hook . whitespace-mode) (haskell-mode-hook . whitespace-mode) (python-mode-hook . whitespace-mode) :init (setq whitespace-style '(face lines-tail tabs tab-mark trailing newline) whitespace-line-column 80)) #+end_src *** Set auto-fill-mode for all text-modes Auto fill mode is nice for most text modes, 80 char limit is great. #+begin_src emacs-lisp (add-hook 'text-mode-hook #'auto-fill-mode) #+end_src *** Smartparens Smartparens is a smarter electric-parens, it's much more aware of context and easier to use. #+begin_src emacs-lisp (use-package smartparens :hook (prog-mode-hook . smartparens-mode) (text-mode-hook . smartparens-mode) :after evil :config (setq sp-highlight-pair-overlay nil sp-highlight-wrap-overlay t sp-highlight-wrap-tag-overlay t) (let ((unless-list '(sp-point-before-word-p sp-point-after-word-p sp-point-before-same-p))) (sp-pair "'" nil :unless unless-list) (sp-pair "\"" nil :unless unless-list)) (sp-local-pair sp-lisp-modes "(" ")" :unless '(:rem sp-point-before-same-p)) (require 'smartparens-config)) #+end_src *** Show-paren-mode Show parenthesis for Emacs #+begin_src emacs-lisp (add-hook 'prog-mode-hook #'show-paren-mode) #+end_src ** Programming Configuration :PROPERTIES: :HTML_CONTAINER: details :END: *** Eldoc Eldoc presents documentation to the user upon placing ones cursor upon any symbol. This is very useful when programming as it: - presents the arguments of functions while writing calls for them - presents typing and documentation of variables #+begin_src emacs-lisp (use-package eldoc :straight nil :hook (prog-mode-hook . eldoc-mode) :init (global-eldoc-mode 1)) (use-package eldoc-box :hook (eldoc-mode-hook . eldoc-box-hover-mode) :init (setq eldoc-box-position-function #'eldoc-box--default-upper-corner-position-function eldoc-box-clear-with-C-g t)) #+end_src *** Eglot Eglot is a library of packages to communicate with LSP servers for better programming capabilities. Interactions with a server provide results to the client, done through JSON. #+begin_src emacs-lisp (use-package eglot :after project :defer t :hook (c++-mode-hook . eglot-ensure) (c-mode-hook . eglot-ensure) (python-mode-hook . eglot-ensure) :general (leader :keymaps 'eglot-mode-map :infix "c" "f" #'eglot-format "a" #'eglot-code-actions "r" #'eglot-rename "R" #'eglot-reconnect) ;; :init ;; (setq eglot-stay-out-of '(flymake)) :config (add-to-list 'eglot-server-programs '((c++-mode c-mode) "clangd")) (add-to-list 'eglot-server-programs `(csharp-mode "~/.local/src/omnisharp-roslyn/run" "-lsp"))) #+end_src *** Flycheck Flycheck is the checking system for Emacs. I don't necessarily like having all my code checked all the time, so I haven't added a hook to prog-mode as it would be better for me to decide when I want checking and when I don't. #+begin_src emacs-lisp (use-package flycheck :commands (flycheck-mode flycheck-list-errors) :general (leader "tf" #'flycheck-mode "cx" #'flycheck-list-errors) :display ("\\*Flycheck.*" (display-buffer-at-bottom) (window-height . 0.25)) :config (with-eval-after-load "evil-collection" (evil-collection-flycheck-setup))) #+end_src *** Tabs and spaces By default, turn off tabs and set the tab width to two. #+begin_src emacs-lisp (setq-default indent-tabs-mode nil tab-width 2) #+end_src However, if necessary later, define a function that may activate tabs locally. #+begin_src emacs-lisp (defun dx:activate-tabs () (interactive) (setq-local indent-tabs-mode t)) #+end_src *** Colourising compilation Colourising the compilation buffer so ansi color codes get computed. #+begin_src emacs-lisp (use-package compile :defer t :straight nil :config (defun +compile/colourise () "Colourise the emacs compilation buffer." (let ((inhibit-read-only t)) (ansi-color-apply-on-region (point-min) (point-max)))) (add-hook 'compilation-filter-hook #'+compile/colourise)) #+end_src *** Highlight todo items TODO items are highlighted in org buffers, but not necessarily in every buffer. This minor mode highlights all TODO like items via a list of strings to match. It also configures faces to use when highlighting. #+begin_src emacs-lisp (use-package hl-todo :after prog-mode :hook (prog-mode-hook . hl-todo-mode) :init (setq hl-todo-keyword-faces '(("TODO" . "#E50000") ("WAIT" . "#00CC00")))) #+end_src ** PDF :PROPERTIES: :HTML_CONTAINER: details :END: PDFs are a great format for (somewhat) immutable text and reports with great formatting options. Though Emacs isn't really the premier solution for viewing PDFs (I highly recommend [[https://pwmt.org/projects/zathura/][Zathura]]), similar to most things with Emacs, having a PDF viewer builtin can be a very useful asset. For example if I were editing an org document which I was eventually compiling into a PDF, my workflow would be much smoother with a PDF viewer within Emacs that I can open on another pane. Furthermore many governmental studies and essays use the PDF format. If I were to be analysing them in a study or project (for example, programming a tool using data from them), which I will most definitely be using Emacs for, having a PDF pane open for occasional viewing can be very useful. *** PDF Tools =pdf-tools= provides the necessary functionality for viewing PDFs. There is no PDF viewing without this package. =evil-collection= provides a setup for this mode, so use that. #+begin_src emacs-lisp (use-package pdf-tools :mode ("\\.[pP][dD][fF]" . pdf-view-mode) :config (with-eval-after-load "evil-collection" (evil-collection-pdf-setup))) #+end_src *** PDF grep PDF grep is a Linux tool that allows for searches against PDFs similar to standard grep (but for PDFs!). It's a bit badly configured (why not use the current buffer?) but it works out. #+begin_src emacs-lisp (use-package pdfgrep :after pdf-tools :hook (pdf-view-mode-hook . pdfgrep-mode) :general (general-def :states 'normal :keymaps 'pdf-view-mode-map "M-g" #'pdfgrep)) #+end_src ** SQL #+begin_src emacs-lisp (use-package sql :straight nil :init (setq sql-display-sqli-buffer-function nil)) #+end_src ** Ada Check out [[file:ada-mode.el][ada-mode*]], my custom ada-mode that replaces the default one. This mode just colourises stuff, and uses eglot to do the heavy lifting. #+begin_src emacs-lisp (load-file (concat user-emacs-directory "ada-mode.el")) (with-eval-after-load "eglot" (add-hook 'ada-mode-hook #'eglot)) #+end_src ** NHexl Hexl-mode is the inbuilt package within Emacs to edit hex and binary format buffers. Though I doubt many programmers nowadays are wrangling with binary formats at such a precise level, I like to use binary formats in my programs sometimes. There are a few problems with hexl-mode though, including an annoying prompt on /revert-buffer/. Thus, nhexl-mode! It comes with a few other improvements, but I care not to describe them. Check out the [[https://elpa.gnu.org/packages/nhexl-mode.html][page]] yourself. #+begin_src emacs-lisp (use-package nhexl-mode :straight t :mode "\\.bin") #+end_src ** Org :PROPERTIES: :HTML_CONTAINER: details :END: *** Org Core Variables :PROPERTIES: :HTML_CONTAINER: details :END: Tons of variables for org-mode, including a ton of latex ones. #+begin_src emacs-lisp (use-package org :defer t :custom (org-agenda-files `(,(expand-file-name "~/Text"))) (org-agenda-window-setup 'current-window) (org-edit-src-content-indentation 0) (org-goto-interface 'outline) (org-src-window-setup 'current-window) (org-indirect-buffer-display 'current-window) (org-imenu-depth 10) (org-eldoc-breadcrumb-separator " → ") (org-enforce-todo-dependencies t) (org-fontify-quote-and-verse-blocks t) (org-fontify-whole-heading-line t) (org-footnote-auto-label 'plain) (org-hide-leading-stars t) (org-hide-emphasis-markers nil) (org-image-actual-width nil) (org-priority-faces '((?A . error) (?B . warning) (?C . success))) (org-startup-indented t) (org-tags-column 0) (org-todo-keywords '((sequence "TODO" "WAIT" "DONE") (sequence "PROJ" "WAIT" "COMPLETE"))) (org-use-sub-superscripts '{}) (org-babel-load-languages '((emacs-lisp . t) (C . t) (python . t))) (org-latex-listings 'minted) (org-latex-minted-langs '((emacs-lisp "common-lisp") (ledger "text") (cc "c++") (cperl "perl") (shell-script "bash") (caml "ocaml"))) (org-latex-packages-alist '(("" "minted"))) (org-latex-pdf-process '("%latex -interaction nonstopmode -shell-escape -output-directory %o %f" "%latex -interaction nonstopmode -shell-escape -output-directory %o %f" "%latex -interaction nonstopmode -shell-escape -output-directory %o %f")) (org-latex-minted-options '(("style" "xcode") ("linenos") ("frame" "single") ("mathescape") ("fontfamily" "courier") ("samepage" "false") ("breaklines" "true") ("breakanywhere" "true") ))) #+end_src *** Org Core Configuration :PROPERTIES: :HTML_CONTAINER: details :END: Hooks, prettify-symbols and my =+org/swiper-goto= to replace the vanilla =org-goto=. Also records for auto insertion. #+begin_src emacs-lisp (use-package org :hook (org-mode-hook . prettify-symbols-mode) :display ("\\*Org Src.*" (display-buffer-same-window)) :pretty (org-mode-hook ("#+begin_src" . "≫") ("#+end_src" . "≪")) :init (with-eval-after-load "autoinsert" (define-auto-insert '("\\.org\\'" . "Org skeleton") '("Enter title: " "#+title: " str | (buffer-file-name) "\n" "#+author: " (read-string "Enter author: ") | user-full-name "\n" "#+description: " (read-string "Enter description: ") | "Description" "\n" "#+options: toc:nil\n\n" "#+begin_center\n" (read-string "Enter further preamble: ") "\n" "#+end_center\n" "#+latex: \clearpage\n" "#+toc: headlines\n" "#+latex: \clearpage\n\n" "* " _)))) #+end_src *** Org Core Bindings Some bindings for org mode. #+begin_src emacs-lisp (use-package org :general (leader "aa" #'org-agenda "fa" (proc (interactive) (find-file (car org-agenda-files)))) (local-leader :keymaps 'org-mode-map "t" #'org-ctrl-c-ctrl-c "l" #'org-latex-preview "s" #'org-property-action "e" #'org-export-dispatch)) #+end_src *** Org message Org message allows for the use of org mode when composing mails, generating HTML multipart emails. This integrates the WYSIWYG experience into mail in Emacs while also providing powerful text features with basically no learning curve (as long as you've already learnt the basics of org). #+begin_src emacs-lisp (use-package org-msg :hook (message-mode-hook . org-msg-mode) :after message-mode :config (setq org-msg-options "html-postamble:nil H:5 num:nil ^:{} toc:nil author:nil email:nil \\n:t tex:dvipng" org-msg-greeting-name-limit 3) (add-to-list 'org-msg-enforce-css '(img latex-fragment-inline ((transform . ,(format "translateY(-1px) scale(%.3f)" (/ 1.0 (if (boundp 'preview-scale) preview-scale 1.4)))) (margin . "0 -0.35em"))))) #+end_src *** Evil Org Evil org for some nice bindings. #+begin_src emacs-lisp (use-package evil-org :hook (org-mode-hook . evil-org-mode)) #+end_src *** Org reveal Org reveal allows one to export org files as HTML presentations via reveal.js. Pretty nifty and it's easy to use. #+begin_src emacs-lisp (use-package ox-reveal :after org :init (setq org-reveal-root "https://cdn.jsdelivr.net/npm/reveal.js" org-reveal-theme "sky")) #+end_src *** Org fragtog :PROPERTIES: :header-args:emacs-lisp: :tangle no :END: Toggle latex fragments in org mode so you get fancy maths symbols. I use latex a bit in org mode as it is the premier way of getting mathematical symbols and text rendered and compiled, but org mode > latex. As Org mode has the ability to accept arbitrary inputs of Latex (through escaped (square) brackets), allowing me to observe how they look is nice to have. #+begin_src emacs-lisp (use-package org-fragtog :hook (org-mode-hook . org-fragtog-mode)) #+end_src *** Org pretty tags #+begin_src emacs-lisp (use-package org-pretty-tags :hook (org-mode-hook . org-pretty-tags-mode)) #+end_src *** Org superstar Org superstar adds cute little unicode symbols for headers, much better than the default asterisks. #+begin_src emacs-lisp (use-package org-superstar :hook (org-mode-hook . org-superstar-mode)) #+end_src ** C/C++ :PROPERTIES: :HTML_CONTAINER: details :END: Setup for C and C++ modes via the cc-mode package. C and C++ are great languages for general purpose programming. Though lisp is more aesthetically and mentally pleasing, they get the job done. Furthermore, they provide speed and finer control in trade of aesthetics and security-based abstractions. When writing C/C++ code, I use folds and section manipulation quite a bit so observing folds is quite important for me when considering a codebase. Thus, I observed the two main styles of brace placement and how they do folds. #+begin_src c :tangle no if (cond) {...} #+end_src vs #+begin_src c :tangle no if (cond) {....} #+end_src I don't print my code, nor am I absolutely pressed for screen real estate in terms of height (such that newlines matter). Width matters to me as I do use Emacs multiplexing capabilities often. Thus, with these in mind the open brace style is a better option than the opposing style. *** Configuration #+begin_src emacs-lisp (use-package cc-mode :defer t :hook (c-mode-hook . auto-fill-mode) (c++-mode-hook . auto-fill-mode) :pretty (c-mode-hook ("puts" . "ℙ") ("fputs" . "ϕ") ("printf" . "ω") ("fprintf" . "Ω") ("->" . "→") ("NULL" . "∅") ("true" . "⊤") ("false" . "⊥") ("char" . "ℂ") ("int" . "ℤ") ("float" . "ℚ") ("double" . "ℝ") ("!" . "¬") ("&&" . "∧") ("||" . "∨") ("for" . "∀") ("return" . "⟼")) (c++-mode-hook ("nullptr" . "∅") ("string" . "𝕊") ("vector" . "ℓ") ("puts" . "ℙ") ("fputs" . "ϕ") ("printf" . "ω") ("fprintf" . "Ω") ("->" . "→") ("NULL" . "∅") ("true" . "⊤") ("false" . "⊥") ("char" . "ℂ") ("int" . "ℤ") ("float" . "ℚ") ("double" . "ℝ") ("!" . "¬") ("&&" . "∧") ("||" . "∨") ("for" . "∀") ("return" . "⟼")) :init (setq-default c-basic-offset 2) (setq-default c-default-style '((other . "user"))) (with-eval-after-load "autoinsert" (define-auto-insert '("\\.c\\'" . "C skeleton") '("" "/* " (file-name-nondirectory (buffer-file-name (current-buffer))) "\n" " * Date: " (format-time-string "%Y-%m-%d") "\n" " * Author: " user-full-name "\n" " */\n" "\n" "\n" _)) (define-auto-insert '("\\.cpp\\'" . "C++ skeleton") '("" "/* " (file-name-nondirectory (buffer-file-name (current-buffer))) "\n" " * Date: " (format-time-string "%Y-%m-%d") "\n" " * Author: " user-full-name "\n" " */\n" "\n" "\n" _))) :config (c-add-style "user" '((c-basic-offset . 2) (c-comment-only-line-offset . 0) (c-hanging-braces-alist (brace-list-open) (brace-entry-open) (substatement-open after) (block-close . c-snug-do-while) (arglist-cont-nonempty)) (c-cleanup-list brace-else-brace) (c-offsets-alist (statement-block-intro . +) (substatement-open . 0) (access-label . -) (inline-open . 0) (label . 0) (statement-cont . +))))) #+end_src *** Clang format Clang format comes in built with clang, so download that before using this. #+begin_src emacs-lisp (use-package clang-format :load-path "/usr/share/clang/" :after cc-mode :commands +code/clang-format-region-or-buffer :general (leader :keymaps '(c-mode-map c++-mode-map) "cf" #'+code/clang-format-region-or-buffer) :config (defun +code/clang-format-region-or-buffer () (interactive) (if (mark) (clang-format-region (region-beginning) (region-end)) (clang-format-buffer)))) #+end_src ** Racket A scheme with lots of stuff inside it. Using it for a language design book so it's useful to have some Emacs binds for it. #+begin_src emacs-lisp (use-package racket-mode :straight t :hook (racket-mode-hook . racket-xp-mode) :display ("\\*Racket.*" (display-buffer-at-bottom) (window-height . 0.25)) :general (local-leader :keymaps 'racket-mode-map "r" #'racket-run "i" #'racket-repl "sr" #'racket-send-region "sd" #'racket-send-definition)) #+end_src ** CSharp #+begin_src emacs-lisp (use-package csharp-mode :defer t :pretty (csharp-mode-hook ("null" . "∅") ("string" . "𝕊") ("List" . "ℓ") ("WriteLine" . "ℙ") ("Write" . "ω") ("->" . "→") ("true" . "⊤") ("false" . "⊥") ("char" . "ℂ") ("int" . "ℤ") ("float" . "ℝ") ("!" . "¬") ("&&" . "∧") ("||" . "∨") ("for" . "∀") ("return" . "⟼"))) #+end_src ** Java :PROPERTIES: :HTML_CONTAINER: details :END: #+begin_src emacs-lisp (use-package ob-java :straight nil :pretty (java-mode-hook ("println" . "ℙ") ("printf" . "ω") ("null" . "∅") ("true" . "⊤") ("false" . "⊥") ("char" . "ℂ") ("int" . "ℤ") ("float" . "ℝ") ("!" . "¬") ("&&" . "∧") ("||" . "∨") ("for" . "∀") ("return" . "⟼")) :config (with-eval-after-load "cc-mode" (c-add-style "java" '((c-basic-offset . 4) (c-comment-only-line-offset 0 . 0) (c-offsets-alist (inline-open . 0) (topmost-intro-cont . +) (statement-block-intro . +) (knr-argdecl-intro . 5) (substatement-open . 0) (substatement-label . +) (label . +) (statement-case-open . +) (statement-cont . +) (arglist-intro . c-lineup-arglist-intro-after-paren) (arglist-close . c-lineup-arglist) (brace-list-intro first c-lineup-2nd-brace-entry-in-arglist c-lineup-class-decl-init-+ +) (access-label . 0) (inher-cont . c-lineup-java-inher) (func-decl-cont . c-lineup-java-throws)))) (add-to-list 'c-default-style '(java-mode . "java"))) (with-eval-after-load "abbrev" (define-abbrev-table 'java-mode-abbrev-table nil) (add-hook 'java-mode-hook (proc (setq-local local-abbrev-table java-mode-abbrev-table))))) #+end_src ** Haskell Haskell is a static lazy functional programming language (what a mouthful). It's quite a beautiful language and really learning it will change the way you think about programming. Here I configure the REPL for Haskell via the =haskell-interactive-mode= as well. #+begin_src emacs-lisp (use-package haskell-mode :hook (haskell-mode-hook . haskell-indentation-mode) (haskell-mode-hook . interactive-haskell-mode) :custom (haskell-interactive-prompt "[λ] ") (haskell-interactive-prompt-cont "{λ} ") (haskell-interactive-popup-errors nil) (haskell-stylish-on-save nil) (haskell-process-type 'stack-ghci) :general (leader "th" #'+shell/toggle-haskell-repl) :display ("\\*haskell.**\\*" (display-buffer-at-bottom) (window-height . 0.25)) :config (load (concat user-emacs-directory "haskell-multiedit.el")) (+dx/create-toggle-function +shell/toggle-haskell-repl "*haskell*" haskell-interactive-bring)) #+end_src ** Python Basic, haven't used python in this configuration yet. #+begin_src emacs-lisp (use-package python :defer t :straight nil :pretty (python-mode-hook ("None" . "∅") ("list" . "ℓ") ("List" . "ℓ") ("str" . "𝕊") ("True" . "⊤") ("False" . "⊥") ("int" . "ℤ") ("float" . "ℝ") ("not" . "¬") ("and" . "∧") ("or" . "∨") ("for" . "∀") ("print" . "ℙ") ("lambda" . "λ") ("return" . "⟼") ("yield" . "⟻")) :init (setq python-indent-offset 4)) #+end_src *** Python shell Setup for python shell, including a toggle option #+begin_src emacs-lisp (use-package python :straight nil :commands +python/toggle-repl :general (leader "tp" #'+shell/python-toggle-repl) :display ("\\*Python\\*" (display-buffer-at-bottom) (window-height . 0.25)) :config (+dx/create-toggle-function +shell/python-toggle-repl "*Python*" run-python)) #+end_src ** YAML YAML is a data language which is useful for config files. #+begin_src emacs-lisp (use-package yaml-mode :straight t) #+end_src ** HTML/CSS/JS Firstly, web mode for consistent colouring of syntax. #+begin_src emacs-lisp (use-package web-mode :mode ("\\.html" . web-mode) :mode ("\\.js" . web-mode) :mode ("\\.css" . web-mode) :custom ((web-mode-code-indent-offset 2) (web-mode-markup-indent-offset 2) (web-mode-css-indent-offset 2))) #+end_src Then emmet for super speed #+begin_src emacs-lisp (use-package emmet-mode :hook (web-mode-hook . emmet-mode) :general (general-def :states 'insert :keymaps 'emmet-mode-keymap "TAB" #'emmet-expand-line "M-j" #'emmet-next-edit-point "M-k" #'emmet-prev-edit-point)) #+end_src ** Typescript #+begin_src emacs-lisp (use-package typescript-mode) #+end_src ** Emacs lisp :PROPERTIES: :HTML_CONTAINER: details :END: Add a new lisp indent function which indents newline lists more appropriately. #+begin_src emacs-lisp (use-package lisp-mode :straight nil :pretty (emacs-lisp-mode-hook ("lambda" . "λ") ("numberp" . "ℤ") ("t" . "⊤") ("nil" . "∅") ("and" . "∧") ("or" . "∨") ("defun" . "ƒ") ("for" . "∀") ("mapc" . "∀") ("mapcar" . "∀")) :config (defun +modded/lisp-indent-function (indent-point state) (let ((normal-indent (current-column)) (orig-point (point))) (goto-char (1+ (elt state 1))) (parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t) (cond ;; car of form doesn't seem to be a symbol, or is a keyword ((and (elt state 2) (or (not (looking-at "\\sw\\|\\s_")) (looking-at ":"))) (if (not (> (save-excursion (forward-line 1) (point)) calculate-lisp-indent-last-sexp)) (progn (goto-char calculate-lisp-indent-last-sexp) (beginning-of-line) (parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t))) ;; Indent under the list or under the first sexp on the same ;; line as calculate-lisp-indent-last-sexp. Note that first ;; thing on that line has to be complete sexp since we are ;; inside the innermost containing sexp. (backward-prefix-chars) (current-column)) ((and (save-excursion (goto-char indent-point) (skip-syntax-forward " ") (not (looking-at ":"))) (save-excursion (goto-char orig-point) (looking-at ":"))) (save-excursion (goto-char (+ 2 (elt state 1))) (current-column))) (t (let ((function (buffer-substring (point) (progn (forward-sexp 1) (point)))) method) (setq method (or (function-get (intern-soft function) 'lisp-indent-function) (get (intern-soft function) 'lisp-indent-hook))) (cond ((or (eq method 'defun) (and (null method) (> (length function) 3) (string-match "\\`def" function))) (lisp-indent-defform state indent-point)) ((integerp method) (lisp-indent-specform method state indent-point normal-indent)) (method (funcall method indent-point state)))))))) (add-hook 'emacs-lisp-mode-hook (proc (interactive) (setq-local lisp-indent-function #'+modded/lisp-indent-function)))) #+end_src