1 #+title: =aminb='s Literate Emacs Configuration
4 #+property: header-args :tangle yes
11 This org file is my literate configuration for GNU Emacs, and is
12 tangled to [[./init.el][init.el]]. Packages are installed and managed using
13 [[https://github.com/emacscollective/borg][Borg]]. Over the years, I've taken inspiration from configurations of
14 many different people. Some of the configurations that I can remember
15 off the top of my head are:
17 - [[https://github.com/dieggsy/dotfiles][dieggsy/dotfiles]]: literate Emacs and dotfiles configuration, uses
18 straight.el for managing packages
19 - [[https://github.com/dakra/dmacs][dakra/dmacs]]: literate Emacs configuration, using Borg for managing
21 - [[http://pages.sachachua.com/.emacs.d/Sacha.html][Sacha Chua's literate Emacs configuration]]
22 - [[https://github.com/dakrone/eos][dakrone/eos]]
23 - Ryan Rix's [[http://doc.rix.si/cce/cce.html][Complete Computing Environment]] ([[http://doc.rix.si/projects/fsem.html][about cce]])
24 - [[https://github.com/jwiegley/dot-emacs][jwiegley/dot-emacs]]: nix-based configuration
25 - [[https://github.com/wasamasa/dotemacs][wasamasa/dotemacs]]
26 - [[https://github.com/hlissner/doom-emacs][Doom Emacs]]
28 I'd like to have a fully reproducible Emacs setup (part of the reason
29 why I store my configuration in this repository) but unfortunately out
30 of the box, that's not achievable with =package.el=, not currently
31 anyway. So, I've opted to use Borg. For what it's worth, I briefly
32 experimented with [[https://github.com/raxod502/straight.el][straight.el]], but found that it added about 2 seconds
33 to my init time; which is unacceptable for me: I use Emacs as my
34 window manager (via EXWM) and coming from bspwm, I'm too used to
35 having fast startup times.
39 To use this config for your Emacs, first you need to clone this repo,
40 then bootstrap Borg, tell Borg to retrieve package submodules, and
41 byte-compiled the packages. Something along these lines should work:
44 git clone https://github.com/aminb/dotfiles ~/.emacs.d
52 * Contents :toc_1:noexport:
56 - [[#initial-setup][Initial setup]]
58 - [[#post-initialization][Post initialization]]
68 #+begin_src emacs-lisp :comments none
69 ;;; init.el --- Amin Bandali's Emacs config -*- lexical-binding: t ; eval: (view-mode 1)-*-
72 Enable =view-mode=, which both makes the file read-only (as a reminder
73 that =init.el= is an auto-generated file, not supposed to be edited),
74 and provides some convenient key bindings for browsing through the
79 #+begin_src emacs-lisp :comments none
80 ;; Copyright (C) 2018 Amin Bandali <amin@aminb.org>
82 ;; This program is free software: you can redistribute it and/or modify
83 ;; it under the terms of the GNU General Public License as published by
84 ;; the Free Software Foundation, either version 3 of the License, or
85 ;; (at your option) any later version.
87 ;; This program is distributed in the hope that it will be useful,
88 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
89 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
90 ;; GNU General Public License for more details.
92 ;; You should have received a copy of the GNU General Public License
93 ;; along with this program. If not, see <https://www.gnu.org/licenses/>.
98 #+begin_src emacs-lisp :comments none
101 ;; Emacs configuration of Amin Bandali, computer scientist and functional
104 ;; THIS FILE IS AUTO-GENERATED FROM `init.org'.
107 ** Naming conventions
109 The conventions below were inspired by [[https://github.com/hlissner/doom-emacs][Doom]]'s conventions, found
110 [[https://github.com/hlissner/doom-emacs/blob/5dacbb7cb1c6ac246a9ccd15e6c4290def67757c/core/core.el#L3-L17][here]]. Naturally, I use my initials, =ab=, instead of =doom=.
112 #+begin_src emacs-lisp :comments none
113 ;; Naming conventions:
115 ;; ab-... public variables or non-interactive functions
116 ;; ab--... private anything (non-interactive), not safe for direct use
117 ;; ab/... an interactive function; safe for M-x or keybinding
118 ;; ab:... an evil operator, motion, or command
119 ;; ab|... a hook function
120 ;; ab*... an advising function
121 ;; ab@... a hydra command
127 :CUSTOM_ID: initial-setup
130 #+begin_src emacs-lisp :comments none
134 ** Emacs initialization
136 I'd like to do a couple of measurements of Emacs' startup time. First,
137 let's see how long Emacs takes to start up, before even loading
138 =init.el=, i.e. =user-init-file=:
140 #+begin_src emacs-lisp
141 (defvar ab--before-user-init-time (current-time)
142 "Value of `current-time' when Emacs begins loading `user-init-file'.")
143 (message "Loading Emacs...done (%.3fs)"
144 (float-time (time-subtract ab--before-user-init-time
148 Also, temporarily increase ~gc-cons-threshhold~ and
149 ~gc-cons-percentage~ during startup to reduce garbage collection
150 frequency. Clearing the ~file-name-handler-alist~ seems to help reduce
151 startup time as well.
153 #+begin_src emacs-lisp
154 (defvar ab--gc-cons-threshold gc-cons-threshold)
155 (defvar ab--gc-cons-percentage gc-cons-percentage)
156 (defvar ab--file-name-handler-alist file-name-handler-alist)
157 (setq gc-cons-threshold (* 400 1024 1024) ; 400 MiB
158 gc-cons-percentage 0.6
159 file-name-handler-alist nil
160 ;; sidesteps a bug when profiling with esup
161 esup-child-profile-require-level 0)
164 Of course, we'd like to set them back to their defaults once we're
167 #+begin_src emacs-lisp
171 (let ((elapsed (float-time (time-subtract (current-time)
172 ab--before-user-init-time))))
173 (message "Loading %s...done (%.3fs) [after-init]"
174 user-init-file elapsed))
175 (setq gc-cons-threshold ab--gc-cons-threshold
176 gc-cons-percentage ab--gc-cons-percentage
177 file-name-handler-alist ab--file-name-handler-alist)))
180 Increase the number of lines kept in message logs (the =*Messages*=
183 #+begin_src emacs-lisp
184 (setq message-log-max 20000)
187 Optionally, we could suppress some byte compiler warnings like below,
188 but for now I've decided to keep them enabled. See documentation for
189 ~byte-compile-warnings~ for more details.
191 #+begin_src emacs-lisp
192 ;; (setq byte-compile-warnings
193 ;; '(not free-vars unresolved noruntime lexical make-local))
196 ** Package management
200 I can do all my package management things with Borg, and don't need
201 Emacs' built-in =package.el=. Emacs 27 lets us disable =package.el= in
202 the =early-init-file= (see [[https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=24acb31c04b4048b85311d794e600ecd7ce60d3b][here]]).
204 #+begin_src emacs-lisp :tangle early-init.el
205 (setq package-enable-at-startup nil)
208 But since Emacs 27 isn't out yet (Emacs 26 is just around the corner
209 right now), and even when released it'll be long before most distros
210 ship in their repos, I'll still put the old workaround with the
211 commented call to ~package-initialize~ here anyway.
213 #+begin_src emacs-lisp
214 (setq package-enable-at-startup nil)
215 ;; (package-initialize)
221 Assimilate Emacs packages as Git submodules
224 [[https://github.com/emacscollective/borg][Borg]] is at the heart of package management of my Emacs setup. In
225 short, it creates a git submodule in =lib/= for each package, which
226 can then be managed with the help of Magit or other tools.
228 #+begin_src emacs-lisp
229 (setq user-init-file (or load-file-name buffer-file-name)
230 user-emacs-directory (file-name-directory user-init-file))
231 (add-to-list 'load-path
232 (expand-file-name "lib/borg" user-emacs-directory))
240 A use-package declaration for simplifying your .emacs
243 [[https://github.com/jwiegley/use-package][use-package]] is an awesome utility for managing and configuring
244 packages (in our case especially the latter) in a neatly organized way
245 and without compromising on performance.
247 #+begin_src emacs-lisp
248 (require 'use-package)
249 (if nil ; set to t when need to debug init
250 (setq use-package-verbose t
251 use-package-expand-minimally nil
252 use-package-compute-statistics t
254 (setq use-package-verbose nil
255 use-package-expand-minimally t))
261 Browse the Emacsmirror package database
264 Epkg provides access to a local copy of the [[https://emacsmirror.net][Emacsmirror]] package
265 database, low-level functions for querying the database, and a
266 =package.el=-like user interface for browsing the available packages.
268 #+begin_src emacs-lisp
273 ** No littering in =~/.emacs.d=
276 Help keeping ~/.emacs.d clean
279 By default, even for Emacs' built-in packages, the configuration files
280 and persistent data are all over the place. Use =no-littering= to help
283 #+begin_src emacs-lisp
284 (use-package no-littering
288 (add-to-list 'savehist-additional-variables 'kill-ring)
290 (setq auto-save-file-name-transforms
291 `((".*" ,(no-littering-expand-var-file-name "auto-save/") t))))
294 ** Custom file (=custom.el=)
296 I'm not planning on using the custom file much, but even so, I
297 definitely don't want it mixing with =init.el=. So, here; let's give
298 it it's own file. While at it, treat themes as safe.
300 #+begin_src emacs-lisp
304 (setq custom-file (no-littering-expand-etc-file-name "custom.el"))
305 (when (file-exists-p custom-file)
307 (setf custom-safe-themes t))
310 ** Better =$PATH= handling
312 Let's use [[https://github.com/purcell/exec-path-from-shell][exec-path-from-shell]] to make Emacs use the =$PATH= as set up
315 #+begin_src emacs-lisp
316 (use-package exec-path-from-shell
319 (setq exec-path-from-shell-check-startup-files nil)
321 (exec-path-from-shell-initialize)
322 ;; while we're at it, let's fix access to our running ssh-agent
323 (exec-path-from-shell-copy-env "SSH_AGENT_PID")
324 (exec-path-from-shell-copy-env "SSH_AUTH_SOCK"))
329 Start server if not already running. Alternatively, can be done by
330 issuing =emacs --daemon= in the terminal, which can be automated with
331 a systemd service or using =brew services start emacs= on macOS. I use
332 Emacs as my window manager (via EXWM), so I always start Emacs on
333 login; so starting the server from inside Emacs is good enough for me.
335 See [[https://www.gnu.org/software/emacs/manual/html_node/emacs/Emacs-Server.html#Emacs-Server][Using Emacs as a Server]].
337 #+begin_src emacs-lisp
339 :config (or (server-running-p) (server-mode)))
351 Might want to set the fringe to a smaller value, especially if using
352 EXWM. I'm fine with the default for now.
354 #+begin_src emacs-lisp
355 ;; (fringe-mode '(3 . 1))
358 *** Disable disabled commands
360 Emacs disables some commands by default that could persumably be
361 confusing for novice users. Let's disable that.
363 #+begin_src emacs-lisp
364 (setq disabled-command-function nil)
369 Save what I copy into clipboard from other applications into Emacs'
370 kill-ring, which would allow me to still be able to easily access it
371 in case I kill (cut or copy) something else inside Emacs before
372 yanking (pasting) what I'd originally intended to.
374 #+begin_src emacs-lisp
375 (setq save-interprogram-paste-before-kill t)
380 #+begin_src emacs-lisp
381 (setq enable-recursive-minibuffers t
382 resize-mini-windows t)
385 *** Lazy-person-friendly yes/no prompts
387 Lazy people would prefer to type fewer keystrokes, especially for yes
388 or no questions. I'm lazy.
390 #+begin_src emacs-lisp
391 (defalias 'yes-or-no-p #'y-or-n-p)
394 *** Startup screen and =*scratch*=
396 Firstly, let Emacs know that I'd like to have =*scratch*= as my
399 #+begin_src emacs-lisp
400 (setq initial-buffer-choice t)
403 Now let's customize the =*scratch*= buffer a bit. First off, I don't
404 need the default hint.
406 #+begin_src emacs-lisp
407 (setq initial-scratch-message nil)
410 Also, let's use Text mode as the major mode, in case I want to
411 customize it (=*scratch*='s default major mode, Fundamental mode,
412 can't really be customized).
414 #+begin_src emacs-lisp
415 (setq initial-major-mode 'text-mode)
418 Inhibit the buffer list when more than 2 files are loaded.
420 #+begin_src emacs-lisp
421 (setq inhibit-startup-buffer-menu t)
424 I don't really need to see the startup screen or echo area message
427 #+begin_src emacs-lisp
428 (advice-add #'display-startup-echo-area-message :override #'ignore)
429 (setq inhibit-startup-screen t
430 inhibit-startup-echo-area-message user-login-name)
433 *** More useful frame titles
435 Show either the file name or the buffer name (in case the buffer isn't
436 visiting a file). Borrowed from Emacs Prelude.
438 #+begin_src emacs-lisp
439 (setq frame-title-format
440 '("" invocation-name " - "
441 (:eval (if (buffer-file-name)
442 (abbreviate-file-name (buffer-file-name))
448 Emacs' default backup settings aren't that great. Let's use more
449 sensible options. See documentation for the ~make-backup-file~
452 #+begin_src emacs-lisp
453 (setq backup-by-copying t
459 The packages in this section are absolutely essential to my everyday
460 workflow, and they play key roles in how I do my computing. They
461 immensely enhance the Emacs experience for me; both using Emacs, and
464 *** [[https://github.com/emacscollective/auto-compile][auto-compile]]
466 #+begin_src emacs-lisp
467 (use-package auto-compile
470 (auto-compile-on-load-mode)
471 (auto-compile-on-save-mode)
472 (setq auto-compile-display-buffer nil
473 auto-compile-mode-line-counter t
474 auto-compile-source-recreate-deletes-dest t
475 auto-compile-toggle-deletes-nonlib-dest t
476 auto-compile-update-autoloads t)
477 (add-hook 'auto-compile-inhibit-compile-hook
478 'auto-compile-inhibit-compile-detached-git-head))
481 *** TODO [[https://github.com/Kungsgeten/ryo-modal][ryo-modal]]
484 Roll your own modal mode
487 *** [[https://github.com/ch11ng/exwm][EXWM]] (window manager)
489 #+begin_src emacs-lisp
493 (require 'exwm-config)
494 (exwm-config-default)
495 (require 'exwm-systemtray)
496 (exwm-systemtray-enable)
497 (require 'exwm-randr)
501 *** [[https://orgmode.org/][Org mode]]
504 Org mode is for keeping notes, maintaining TODO lists, planning
505 projects, and authoring documents with a fast and effective plain-text
509 In short, my favourite way of life.
511 #+begin_src emacs-lisp
512 (setq org-src-tab-acts-natively t
513 org-src-preserve-indentation nil
514 org-edit-src-content-indentation 0)
517 *** [[https://magit.vc/][Magit]]
520 It's Magit! A Git porcelain inside Emacs.
523 Not just how I do git, but /the/ way to do git.
525 #+begin_src emacs-lisp
528 :bind (("s-g" . magit-status)
529 ("C-x g" . magit-status)
530 ("C-x M-g" . magit-dispatch-popup))
532 (magit-add-section-hook 'magit-status-sections-hook
533 'magit-insert-modules
534 'magit-insert-stashes
538 *** [[https://github.com/abo-abo/swiper][Ivy]] (and friends)
541 Ivy - a generic completion frontend for Emacs, Swiper - isearch with
542 an overview, and more. Oh, man!
545 There's no way I could top that, so I won't attempt to.
549 #+begin_src emacs-lisp
552 (:map ivy-minibuffer-map
553 ([escape] . keyboard-escape-quit)
554 ("C-j" . ivy-next-line)
555 ("C-k" . ivy-previous-line)
556 ([S-up] . ivy-previous-history-element)
557 ([S-down] . ivy-next-history-element)
558 ("DEL" . ivy-backward-delete-char))
565 #+begin_src emacs-lisp
567 :bind (([remap isearch-forward] . swiper)
568 ([remap isearch-backward] . swiper)))
573 #+begin_src emacs-lisp
576 :bind (([remap execute-extended-command] . counsel-M-x)
577 ([remap find-file] . counsel-find-file)
578 ("s-r" . counsel-recentf)
579 :map minibuffer-local-map
580 ("C-r" . counsel-minibuffer-history))
583 (defalias 'locate #'counsel-locate))
586 * Borg's =layer/essentials=
588 TODO: break this giant source block down into individual org sections.
590 #+begin_src emacs-lisp
592 :config (dash-enable-font-lock))
596 (setq diff-hl-draw-borders nil)
597 (global-diff-hl-mode)
598 (add-hook 'magit-post-refresh-hook 'diff-hl-magit-post-refresh t))
602 :config (setq dired-listing-switches "-alh"))
605 :when (version< "25" emacs-version)
606 :config (global-eldoc-mode))
610 :config (temp-buffer-resize-mode))
613 (setq isearch-allow-scroll t))
615 (use-package lisp-mode
617 (add-hook 'emacs-lisp-mode-hook 'outline-minor-mode)
618 (add-hook 'emacs-lisp-mode-hook 'reveal-mode)
619 (defun indent-spaces-mode ()
620 (setq indent-tabs-mode nil))
621 (add-hook 'lisp-interaction-mode-hook #'indent-spaces-mode))
625 :config (setq Man-width 80))
628 :config (show-paren-mode))
630 (use-package prog-mode
631 :config (global-prettify-symbols-mode)
632 (defun indicate-buffer-boundaries-left ()
633 (setq indicate-buffer-boundaries 'left))
634 (add-hook 'prog-mode-hook #'indicate-buffer-boundaries-left))
638 :config (add-to-list 'recentf-exclude "^/\\(?:ssh\\|su\\|sudo\\)?:"))
640 (use-package savehist
641 :config (savehist-mode))
643 (use-package saveplace
644 :when (version< "25" emacs-version)
645 :config (save-place-mode))
648 :config (column-number-mode))
651 (add-hook 'text-mode-hook #'indicate-buffer-boundaries-left))
656 (add-to-list 'tramp-default-proxies-alist '(nil "\\`root\\'" "/ssh:%h:"))
657 (add-to-list 'tramp-default-proxies-alist '("localhost" nil nil))
658 (add-to-list 'tramp-default-proxies-alist
659 (list (regexp-quote (system-name)) nil nil)))
661 (use-package undo-tree
663 (global-undo-tree-mode)
664 (setq undo-tree-mode-lighter ""))
667 * Post initialization
669 :CUSTOM_ID: post-initialization
672 Display how long it took to load the init file.
674 #+begin_src emacs-lisp
675 (message "Loading %s...done (%.3fs)" user-init-file
676 (float-time (time-subtract (current-time)
677 ab--before-user-init-time)))
685 #+begin_src emacs-lisp :comments none
686 ;;; init.el ends here