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|
#+title: =aminb='s Emacs Init file
#+property: header-args :results silent :comments link :tangle ~/dotfiles/emacs/init.el
* Intro
TODO: description
* Contents :toc_1:noexport:
- [[#intro][Intro]]
- [[#header][Header]]
- [[#initial-setup][Initial setup]]
- [[#config][Config]]
- [[#footer][Footer]]
* Header
:PROPERTIES:
:CUSTOM_ID: header
:END:
** First line
#+begin_src emacs-lisp :comments none
;;; init.el --- Amin Bandali's Emacs config -*- lexical-binding: t ; eval: (view-mode 1)-*-
#+end_src
Enable =view-mode=, which both makes the file read-only (as a reminder
that =init.el= is an auto-generated file, not supposed to be edited),
and provides some convenient key bindings for browsing through the
file.
** License
#+begin_src emacs-lisp :comments none
;; Copyright (C) 2018 Amin Bandali <amin@aminb.org>
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
#+end_src
** Commentary
#+begin_src emacs-lisp :comments none
;;; Commentary:
;; Emacs configuration of Amin Bandali, computer scientist and functional
;; programmer.
;; THIS FILE IS AUTO-GENERATED FROM `init.org'.
#+end_src
* Initial setup
:PROPERTIES:
:CUSTOM_ID: initial-setup
:END:
#+begin_src emacs-lisp :comments none
;;; Code:
#+end_src
** Startup time
Measure and display startup time. Also, temporarily increase
~gc-cons-threshhold~ during startup to reduce reduce garbage
collection frequency. Taken from [[https://github.com/dieggsy/dotfiles/tree/3d95bc08033920e077855caf545a975eba52d28d/emacs.d#startup-time][here]].
#+begin_src emacs-lisp
(defconst ab--emacs-start-time (current-time))
(defconst ab--gc-cons-threshold gc-cons-threshold)
(defconst ab--gc-cons-percentage gc-cons-percentage)
(defvar ab--file-name-handler-alist file-name-handler-alist)
(setq gc-cons-threshold 400000000
gc-cons-percentage 0.6
file-name-handler-alist nil
;; sidesteps a bug when profiling with esup
esup-child-profile-require-level 0)
#+end_src
Reset the variables back to default after init.
#+begin_src emacs-lisp
(add-hook
'after-init-hook
`(lambda ()
(setq gc-cons-threshold ab--gc-cons-threshold
gc-cons-percentage ab--gc-cons-percentage
file-name-handler-alist ab--file-name-handler-alist)
(let ((elapsed (float-time (time-subtract (current-time)
ab--emacs-start-time))))
(message "Loading %s...done (%.3fs) [after-init]"
,load-file-name elapsed))))
#+end_src
Note that I'll be using my initials, =ab=, as a prefix for the
variables and functions I define throughout my init file.
** Package management
*** =straight.el=
#+begin_quote
Next-generation, purely functional package manager for the Emacs
hacker.
#+end_quote
=straight.el= allows me to have a fully reproducible Emacs setup.
**** Bootstrap
#+begin_src emacs-lisp
(let ((bootstrap-file (concat user-emacs-directory "straight/repos/straight.el/bootstrap.el"))
(bootstrap-version 3))
(unless (file-exists-p bootstrap-file)
(with-current-buffer
(url-retrieve-synchronously
"https://raw.githubusercontent.com/raxod502/straight.el/develop/install.el"
'silent 'inhibit-cookies)
(goto-char (point-max))
(eval-print-last-sexp)))
(load bootstrap-file nil 'nomessage))
#+end_src
**** Useful helpers
#+begin_src emacs-lisp
(defun straight-reload-init ()
"Reload init.el."
(interactive)
(straight-transaction
(straight-mark-transaction-as-init)
(message "Reloading init.el...")
(load user-init-file nil 'nomessage)
(message "Reloading init.el... done.")))
(defun straight-eval-buffer ()
"Evaluate the current buffer as Elisp code."
(interactive)
(message "Evaluating %s..." (buffer-name))
(straight-transaction
(if (null buffer-file-name)
(eval-buffer)
(when (string= buffer-file-name user-init-file)
(straight-mark-transaction-as-init))
(load-file buffer-file-name)))
(message "Evaluating %s... done." (buffer-name)))
#+end_src
*** =use-package=
#+begin_quote
A use-package declaration for simplifying your .emacs
#+end_quote
=use-package= is an awesome utility for managing and configuring
packages in a neatly organized way and without compromising on
performance. So let's install it using =striaght.el= and have it use
=straight.el= for installing packages.
#+begin_src emacs-lisp
(straight-use-package 'use-package)
(setq straight-use-package-by-default t)
#+end_src
** No littering in =~/.emacs.d=
#+begin_quote
Help keeping ~/.emacs.d clean
#+end_quote
By default, even for Emacs' built-in packages, the configuration files
and persistent data are all over the place. Use =no-littering= to help
contain the mess.
#+begin_src emacs-lisp
(use-package no-littering
:demand t
:config
(savehist-mode 1)
(add-to-list 'savehist-additional-variables 'kill-ring)
(save-place-mode 1)
(setq auto-save-file-name-transforms
`((".*" ,(no-littering-expand-var-file-name "auto-save/") t))))
#+end_src
** Custom file (=custom.el=)
I'm not planning on using the custom file much, but even so, I
definitely don't want it mixing with =init.el=. So, here, let's give
it it's own file.
#+begin_src emacs-lisp
(setq custom-file (no-littering-expand-etc-file-name "custom.el"))
(when (file-exists-p custom-file)
(load custom-file))
#+end_src
** Backups
Emacs' default backup settings aren't that great. Let's use more
sensible options. See documentation for the ~make-backup-file~
variable.
#+begin_src emacs-lisp
(setq backup-by-copying t
version-control t)
#+end_src
* Config
:PROPERTIES:
:CUSTOM_ID: config
:END:
** Org
#+begin_src emacs-lisp
(setq org-src-tab-acts-natively t
org-src-preserve-indentation nil
org-edit-src-content-indentation 0)
#+end_src
* Footer
:PROPERTIES:
:CUSTOM_ID: footer
:END:
#+begin_src emacs-lisp :comments none
;;; init.el ends here
#+end_src
|
