[emacs][wip] move diff-hl to Editing

[~bandali/configs] / init.org

#+title: =aminb='s Literate Emacs Configuration
#+author: Amin Bandali
#+babel: :cache yes
#+property: header-args :tangle yes

* About
:PROPERTIES:
:CUSTOM_ID: about
:END:

This org file is my literate configuration for GNU Emacs, and is
tangled to [[./init.el][init.el]]. Packages are installed and managed using
[[https://github.com/emacscollective/borg][Borg]]. Over the years, I've taken inspiration from configurations of
many different people. Some of the configurations that I can remember
off the top of my head are:

- [[https://github.com/dieggsy/dotfiles][dieggsy/dotfiles]]: literate Emacs and dotfiles configuration, uses
  straight.el for managing packages
- [[https://github.com/dakra/dmacs][dakra/dmacs]]: literate Emacs configuration, using Borg for managing
  packages
- [[http://pages.sachachua.com/.emacs.d/Sacha.html][Sacha Chua's literate Emacs configuration]]
- [[https://github.com/dakrone/eos][dakrone/eos]]
- Ryan Rix's [[http://doc.rix.si/cce/cce.html][Complete Computing Environment]] ([[http://doc.rix.si/projects/fsem.html][about cce]])
- [[https://github.com/jwiegley/dot-emacs][jwiegley/dot-emacs]]: nix-based configuration
- [[https://github.com/wasamasa/dotemacs][wasamasa/dotemacs]]
- [[https://github.com/hlissner/doom-emacs][Doom Emacs]]

I'd like to have a fully reproducible Emacs setup (part of the reason
why I store my configuration in this repository) but unfortunately out
of the box, that's not achievable with =package.el=, not currently
anyway. So, I've opted to use Borg. For what it's worth, I briefly
experimented with [[https://github.com/raxod502/straight.el][straight.el]], but found that it added about 2 seconds
to my init time; which is unacceptable for me: I use Emacs as my
window manager (via EXWM) and coming from bspwm, I'm too used to
having fast startup times.

** Installation

To use this config for your Emacs, first you need to clone this repo,
then bootstrap Borg, tell Borg to retrieve package submodules, and
byte-compiled the packages. Something along these lines should work:

#+begin_src sh :tangle no
git clone https://github.com/aminb/dotfiles ~/.emacs.d
cd ~/.emacs.d
make bootstrap-borg
make bootstrap
make build
#+end_src

* Contents                                                   :toc_1:noexport:

- [[#about][About]]
- [[#header][Header]]
- [[#initial-setup][Initial setup]]
- [[#core][Core]]
- [[#borg-essentials][Borg's =layer/essentials=]]
- [[#editing][Editing]]
- [[#syntax-spell-checking][Syntax and spell checking]]
- [[#programming-modes][Programming modes]]
- [[#emacs-enhancements][Emacs enhancements]]
- [[#email][Email]]
- [[#blogging][Blogging]]
- [[#post-initialization][Post initialization]]
- [[#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 <bandali@gnu.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, functional
;; programmer, and free software advocate.

;; THIS FILE IS AUTO-GENERATED FROM `init.org'.
#+end_src

* Initial setup
:PROPERTIES:
:CUSTOM_ID: initial-setup
:END:

** Emacs initialization

I'd like to do a couple of measurements of Emacs' startup time. First,
let's see how long Emacs takes to start up, before even loading
=init.el=, i.e. =user-init-file=:

#+begin_src emacs-lisp
(defvar a/before-user-init-time (current-time)
  "Value of `current-time' when Emacs begins loading `user-init-file'.")
(message "Loading Emacs...done (%.3fs)"
         (float-time (time-subtract a/before-user-init-time
                                    before-init-time)))
#+end_src

Also, temporarily increase ~gc-cons-threshhold~ and
~gc-cons-percentage~ during startup to reduce garbage collection
frequency. Clearing the ~file-name-handler-alist~ seems to help reduce
startup time as well.

#+begin_src emacs-lisp
(defvar a/gc-cons-threshold gc-cons-threshold)
(defvar a/gc-cons-percentage gc-cons-percentage)
(defvar a/file-name-handler-alist file-name-handler-alist)
(setq gc-cons-threshold (* 400 1024 1024)  ; 400 MiB
      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

Of course, we'd like to set them back to their defaults once we're
done initializing.

#+begin_src emacs-lisp
(add-hook
 'after-init-hook
 (lambda ()
   (setq gc-cons-threshold a/gc-cons-threshold
         gc-cons-percentage a/gc-cons-percentage
         file-name-handler-alist a/file-name-handler-alist)))
#+end_src

Increase the number of lines kept in message logs (the =*Messages*=
buffer).

#+begin_src emacs-lisp
(setq message-log-max 20000)
#+end_src

Optionally, we could suppress some byte compiler warnings like below,
but for now I've decided to keep them enabled. See documentation for
~byte-compile-warnings~ for more details.

#+begin_src emacs-lisp
;; (setq byte-compile-warnings
;;       '(not free-vars unresolved noruntime lexical make-local))
#+end_src

** whoami

#+begin_src emacs-lisp
(setq user-full-name "Amin Bandali"
      user-mail-address "amin@aminb.org")
#+end_src

** Package management

*** No =package.el=

I can do all my package management things with =straight.el=, and
don't need Emacs' built-in =package.el=.  Emacs 27 lets us disable
=package.el= in the =early-init-file= (see [[https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=24acb31c04b4048b85311d794e600ecd7ce60d3b][here]]).

#+begin_src emacs-lisp :tangle early-init.el
(setq package-enable-at-startup nil)
#+end_src

But since Emacs 27 isn't out yet (Emacs 26 is just around the corner
right now), and even when released it'll be long before most distros
ship in their repos, I'll still put the old workaround with the
commented call to ~package-initialize~ here anyway.

#+begin_src emacs-lisp :tangle no
(setq package-enable-at-startup nil)
;; (package-initialize)
#+end_src

Update: the above is not necessary, since =straight.el= automatically
does that (and more).  See =straight-package-neutering-mode=.

*** =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.

#+begin_src emacs-lisp
(setq straight-repository-branch "develop")

(defvar bootstrap-version)
(let ((bootstrap-file
       (expand-file-name "straight/repos/straight.el/bootstrap.el" user-emacs-directory))
      (bootstrap-version 5))
  (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))

(setq straight-use-package-by-default t)
#+end_src

Since we enable =straight.el='s =straight-use-package-by-default=
integration, we will define a =use-feature= for plain ole
=use-package= without any of the =straight.el= stuff.

#+begin_src emacs-lisp
(defmacro use-feature (name &rest args)
  "Like `use-package', but with `straight-use-package-by-default' disabled."
  (declare (indent defun))
  `(use-package ,name
     :straight nil
,@args))
#+end_src

*** COMMENT Borg

#+begin_quote
Assimilate Emacs packages as Git submodules
#+end_quote

[[https://github.com/emacscollective/borg][Borg]] is at the heart of package management of my Emacs setup. In
short, it creates a git submodule in =lib/= for each package, which
can then be managed with the help of Magit or other tools.

#+begin_src emacs-lisp
(setq user-init-file (or load-file-name buffer-file-name)
      user-emacs-directory (file-name-directory user-init-file))
(add-to-list 'load-path
             (expand-file-name "lib/borg" user-emacs-directory))
(require 'borg)
(borg-initialize)

;; (require 'borg-nix-shell)
;; (setq borg-build-shell-command 'borg-nix-shell-build-command)

(with-eval-after-load 'bind-key
  (bind-keys
   :package borg
   ("C-c b A" . borg-activate)
   ("C-c b a" . borg-assimilate)
   ("C-c b b" . borg-build)
   ("C-c b c" . borg-clone)
   ("C-c b r" . borg-remove)))
#+end_src

*** =use-package=

#+begin_quote
A use-package declaration for simplifying your .emacs
#+end_quote

[[https://github.com/jwiegley/use-package][use-package]] is an awesome utility for managing and configuring
packages (in our case especially the latter) in a neatly organized way
and without compromising on performance.

#+begin_src emacs-lisp
(straight-use-package 'use-package)
(if nil  ; set to t when need to debug init
    (setq use-package-verbose t
          use-package-expand-minimally nil
          use-package-compute-statistics t
          debug-on-error t)
  (setq use-package-verbose nil
        use-package-expand-minimally t))
#+end_src

*** COMMENT Epkg

#+begin_quote
Browse the Emacsmirror package database
#+end_quote

Epkg provides access to a local copy of the [[https://emacsmirror.net][Emacsmirror]] package
database, low-level functions for querying the database, and a
=package.el=-like user interface for browsing the available packages.

#+begin_src emacs-lisp
(use-package epkg
  :defer t
  :bind
  (("C-c b d" . epkg-describe-package)
   ("C-c b p" . epkg-list-packages)
   ("C-c b u" . epkg-update))
  :config
  (eval-when-compile (defvar ivy-initial-inputs-alist))
  (with-eval-after-load 'ivy
    (add-to-list
     'ivy-initial-inputs-alist '(epkg-describe-package . "^") 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. While at it, treat themes as safe.

#+begin_src emacs-lisp
(use-feature custom
  :no-require t
  :config
  (setq custom-file (no-littering-expand-etc-file-name "custom.el"))
  (when (file-exists-p custom-file)
    (load custom-file))
  (setf custom-safe-themes t))
#+end_src

** Secrets file

Load the secrets file if it exists, otherwise show a warning.

#+begin_src emacs-lisp
(with-demoted-errors
    (load (no-littering-expand-etc-file-name "secrets")))
#+end_src

** Better =$PATH= handling

Let's use [[https://github.com/purcell/exec-path-from-shell][exec-path-from-shell]] to make Emacs use the =$PATH= as set up
in my shell.

#+begin_src emacs-lisp
(use-package exec-path-from-shell
  :defer 1
  :init
  (setq exec-path-from-shell-check-startup-files nil)
  :config
  (exec-path-from-shell-initialize)
  ;; while we're at it, let's fix access to our running ssh-agent
  (exec-path-from-shell-copy-env "SSH_AGENT_PID")
  (exec-path-from-shell-copy-env "SSH_AUTH_SOCK"))
#+end_src

** COMMENT Only one custom theme at a time

#+begin_src emacs-lisp
(defadvice load-theme (before clear-previous-themes activate)
  "Clear existing theme settings instead of layering them"
  (mapc #'disable-theme custom-enabled-themes))
#+end_src

** Server

Start server if not already running. Alternatively, can be done by
issuing =emacs --daemon= in the terminal, which can be automated with
a systemd service or using =brew services start emacs= on macOS. I use
Emacs as my window manager (via EXWM), so I always start Emacs on
login; so starting the server from inside Emacs is good enough for me.

See [[https://www.gnu.org/software/emacs/manual/html_node/emacs/Emacs-Server.html#Emacs-Server][Using Emacs as a Server]].

#+begin_src emacs-lisp
(use-feature server
  :defer 1
  :config (or (server-running-p) (server-mode)))
#+end_src

** COMMENT Unicode support

Font stack with better unicode support, around =Ubuntu Mono= and
=Hack=.

#+begin_src emacs-lisp
(dolist (ft (fontset-list))
  (set-fontset-font
   ft
   'unicode
   (font-spec :name "Source Code Pro" :size 14))
  (set-fontset-font
   ft
   'unicode
   (font-spec :name "DejaVu Sans Mono")
   nil
   'append)
  ;; (set-fontset-font
  ;;  ft
  ;;  'unicode
  ;;  (font-spec
  ;;   :name "Symbola monospacified for DejaVu Sans Mono")
  ;;  nil
  ;;  'append)
  ;; (set-fontset-font
  ;;  ft
  ;;  #x2115  ; ℕ
  ;;  (font-spec :name "DejaVu Sans Mono")
  ;;  nil
  ;;  'append)
  (set-fontset-font
   ft
   (cons ?Α ?ω)
   (font-spec :name "DejaVu Sans Mono" :size 14)
   nil
   'prepend))
#+end_src

** Gentler font resizing

#+begin_src emacs-lisp
(setq text-scale-mode-step 1.05)
#+end_src

** Focus follows mouse

I’d like focus to follow the mouse when I move the cursor from one
window to the next.

#+begin_src emacs-lisp
(setq mouse-autoselect-window t)
#+end_src

Let’s define a function to conveniently disable this for certain
buffers and/or modes.

#+begin_src emacs-lisp
(defun a/no-mouse-autoselect-window ()
  (make-local-variable 'mouse-autoselect-window)
  (setq mouse-autoselect-window nil))
#+end_src

** Libraries

#+begin_src emacs-lisp
(require 'cl-lib)
(require 'subr-x)
#+end_src

** Useful utilities

Convenience macro for =setq='ing multiple variables to the same value:

#+begin_src emacs-lisp
(defmacro a/setq-every (value &rest vars)
  "Set all the variables from VARS to value VALUE."
  (declare (indent defun) (debug t))
  `(progn ,@(mapcar (lambda (x) (list 'setq x value)) vars)))
#+end_src

The following process-related stuff from [[https://github.com/alezost/emacs-config][alezost's emacs-config]].

#+begin_src emacs-lisp
(defun a/start-process (program &rest args)
  "Same as `start-process', but doesn't bother about name and buffer."
  (let ((process-name (concat program "_process"))
        (buffer-name  (generate-new-buffer-name
                       (concat program "_output"))))
    (apply #'start-process
           process-name buffer-name program args)))

(defun a/dired-start-process (program &optional args)
  "Open current file with a PROGRAM."
  ;; Shell command looks like this: "program [ARGS]... FILE" (ARGS can
  ;; be nil, so remove it).
  (apply #'a/start-process
         program
         (remove nil (list args (dired-get-file-for-visit)))))
#+end_src

* Core
:PROPERTIES:
:CUSTOM_ID: core
:END:

** Defaults

*** Time and battery in mode-line

Enable displaying time and battery in the mode-line, since I'm not
using the Xfce panel anymore. Also, I don't need to see the load
average on a regular basis, so disable that.

Note: using =i3status= on sway at the moment, so disabling this.

#+begin_src emacs-lisp :tangle no
(use-package time
  :init
  (setq display-time-default-load-average nil)
  :config
  (display-time-mode))

(use-package battery
  :config
  (display-battery-mode))
#+end_src

*** Smaller fringe

Might want to set the fringe to a smaller value, especially if using
EXWM. I'm fine with the default for now.

#+begin_src emacs-lisp
;; (fringe-mode '(3 . 1))
(fringe-mode nil)
#+end_src

*** Disable disabled commands

Emacs disables some commands by default that could persumably be
confusing for novice users. Let's disable that.

#+begin_src emacs-lisp
(setq disabled-command-function nil)
#+end_src

*** Kill-ring

Save what I copy into clipboard from other applications into Emacs'
kill-ring, which would allow me to still be able to easily access it
in case I kill (cut or copy) something else inside Emacs before
yanking (pasting) what I'd originally intended to.

#+begin_src emacs-lisp
(setq save-interprogram-paste-before-kill t)
#+end_src

*** Minibuffer

#+begin_src emacs-lisp
(setq enable-recursive-minibuffers t
      resize-mini-windows t)
#+end_src

*** Lazy-person-friendly yes/no prompts

Lazy people would prefer to type fewer keystrokes, especially for yes
or no questions. I'm lazy.

#+begin_src emacs-lisp
(defalias 'yes-or-no-p #'y-or-n-p)
#+end_src

*** Startup screen and =*scratch*=

Firstly, let Emacs know that I'd like to have =*scratch*= as my
startup buffer.

#+begin_src emacs-lisp
(setq initial-buffer-choice t)
#+end_src

Now let's customize the =*scratch*= buffer a bit. First off, I don't
need the default hint.

#+begin_src emacs-lisp
(setq initial-scratch-message nil)
#+end_src

Also, let's use Text mode as the major mode, in case I want to
customize it (=*scratch*='s default major mode, Fundamental mode,
can't really be customized).

#+begin_src emacs-lisp
(setq initial-major-mode 'text-mode)
#+end_src

Inhibit the buffer list when more than 2 files are loaded.

#+begin_src emacs-lisp
(setq inhibit-startup-buffer-menu t)
#+end_src

I don't really need to see the startup screen or echo area message
either.

#+begin_src emacs-lisp
(advice-add #'display-startup-echo-area-message :override #'ignore)
(setq inhibit-startup-screen t
      inhibit-startup-echo-area-message user-login-name)
#+end_src

*** More useful frame titles

Show either the file name or the buffer name (in case the buffer isn't
visiting a file). Borrowed from Emacs Prelude.

#+begin_src emacs-lisp
(setq frame-title-format
      '("" invocation-name " - "
        (:eval (if (buffer-file-name)
                   (abbreviate-file-name (buffer-file-name))
                 "%b"))))
#+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
      delete-old-versions t)
#+end_src

*** Auto revert

Enable automatic reloading of changed buffers and files.

#+begin_src emacs-lisp
(global-auto-revert-mode 1)
(setq auto-revert-verbose nil
      global-auto-revert-non-file-buffers nil)
#+end_src

*** Always use space for indentation

#+begin_src emacs-lisp
(setq-default
 indent-tabs-mode nil
 require-final-newline t
 tab-width 4)
#+end_src

*** Winner mode

Enable =winner-mode=.

#+begin_src emacs-lisp
(winner-mode 1)
#+end_src

*** Don’t display =*compilation*= on success

Based on https://stackoverflow.com/a/17788551, with changes to use
=cl-letf= instead of the now obsolete =flet=.

#+begin_src emacs-lisp
(with-eval-after-load 'compile
  (defun a/compilation-finish-function (buffer outstr)
    (unless (string-match "finished" outstr)
      (switch-to-buffer-other-window buffer))
    t)

  (setq compilation-finish-functions #'a/compilation-finish-function)

  (require 'cl-macs)

  (defadvice compilation-start
      (around inhibit-display
              (command &optional mode name-function highlight-regexp))
    (if (not (string-match "^\\(find\\|grep\\)" command))
        (cl-letf (((symbol-function 'display-buffer) #'ignore))
          (save-window-excursion ad-do-it))
      ad-do-it))
  (ad-activate 'compilation-start))
#+end_src

*** Search for non-ASCII characters

I’d like non-ASCII characters such as ‘’“”«»‹›áⓐ𝒶 to be selected when
I search for their ASCII counterpart.  Shoutout to [[http://endlessparentheses.com/new-in-emacs-25-1-easily-search-non-ascii-characters.html][endlessparentheses]]
for this.

#+begin_src emacs-lisp
(setq search-default-mode #'char-fold-to-regexp)

;; uncomment to extend this behaviour to query-replace
;; (setq replace-char-fold t)
#+end_src

*** Cursor shape

#+begin_src emacs-lisp
(setq-default cursor-type 'bar)
#+end_src

** Bindings

#+begin_src emacs-lisp
(bind-keys
 ("C-c a i" . ielm)

 ("C-c e b" . eval-buffer)
 ("C-c e r" . eval-region)

 ("C-c F m" . make-frame-command)
 ("C-c F d" . delete-frame)
 ("C-c F D" . delete-other-frames)

 ("C-c o"   . other-window)

 ("C-c Q"   . save-buffers-kill-terminal)

 ("C-S-h C" . describe-char)
 ("C-S-h F" . describe-face)

 ("C-x K"   . kill-this-buffer)

 ("s-p"     . beginning-of-buffer)
 ("s-n"     . end-of-buffer))
#+end_src

** Packages

The packages in this section are absolutely essential to my everyday
workflow, and they play key roles in how I do my computing. They
immensely enhance the Emacs experience for me; both using Emacs, and
customizing it.

*** [[https://github.com/emacscollective/auto-compile][auto-compile]]

#+begin_src emacs-lisp
(use-package auto-compile
  :demand t
  :config
  (auto-compile-on-load-mode)
  (auto-compile-on-save-mode)
  (setq auto-compile-display-buffer               nil
        auto-compile-mode-line-counter            t
        auto-compile-source-recreate-deletes-dest t
        auto-compile-toggle-deletes-nonlib-dest   t
        auto-compile-update-autoloads             t)
  (add-hook 'auto-compile-inhibit-compile-hook
            'auto-compile-inhibit-compile-detached-git-head))
#+end_src

*** [[https://orgmode.org/][Org]]

#+begin_quote
Org mode is for keeping notes, maintaining TODO lists, planning
projects, and authoring documents with a fast and effective plain-text
system.
#+end_quote

In short, my favourite way of life.

First, we have to resort to a [[https://github.com/raxod502/straight.el#installing-org-with-straightel][hack]] to be able to use the correct
latest version of Org from upstream.

#+begin_src emacs-lisp
  (use-package git)

  (defun org-git-version ()
    "The Git version of org-mode.
  Inserted by installing org-mode or when a release is made."
    (require 'git)
    (let ((git-repo (expand-file-name
                     "straight/repos/org/" user-emacs-directory)))
      (string-trim
       (git-run "describe"
                "--match=release\*"
                "--abbrev=6"
                "HEAD"))))

  (defun org-release ()
    "The release version of org-mode.
  Inserted by installing org-mode or when a release is made."
    (require 'git)
    (let ((git-repo (expand-file-name
                     "straight/repos/org/" user-emacs-directory)))
      (string-trim
       (string-remove-prefix
        "release_"
        (git-run "describe"
                 "--match=release\*"
                 "--abbrev=0"
                 "HEAD")))))

(provide 'org-version)
#+end_src

We will use the =org-plus-contrib= package to get the whole deal:

#+begin_src emacs-lisp
(straight-use-package 'org-plus-contrib)
#+end_src

And here's where my actual Org configurations begin:

#+begin_src emacs-lisp
(use-feature org
  :defer 0.5
  :config
  (setq org-src-tab-acts-natively t
        org-src-preserve-indentation nil
        org-edit-src-content-indentation 0
        org-email-link-description-format "Email %c: %s" ; %.30s
        org-highlight-latex-and-related '(entities)
        org-use-speed-commands t
        org-startup-folded 'content
        org-catch-invisible-edits 'show-and-error
        org-log-done 'time)
  (add-to-list 'org-structure-template-alist '("L" . "src emacs-lisp") t)
  (font-lock-add-keywords
   'org-mode
   '(("[ \t]*\\(#\\+\\(BEGIN\\|END\\|begin\\|end\\)_\\(\\S-+\\)\\)[ \t]*\\([^\n:]*\\)"
      (1 '(:foreground "#5a5b5a" :background "#292b2b") t) ; directive
      (3 '(:foreground "#81a2be" :background "#292b2b") t) ; kind
      (4 '(:foreground "#c5c8c6") t))) ; title
   t)
  :bind (:map org-mode-map ("M-L" . org-insert-last-stored-link))
  :hook ((org-mode . org-indent-mode)
         (org-mode . auto-fill-mode)
         (org-mode . flyspell-mode))
  :custom
  (org-latex-packages-alist '(("" "listings") ("" "color")))
  :custom-face
  '(org-block-begin-line ((t (:foreground "#5a5b5a" :background "#1d1f21"))))
  '(org-block ((t (:background "#1d1f21"))))
  '(org-latex-and-related ((t (:foreground "#b294bb")))))

(use-feature ox-latex
  :after ox
  :config
  (setq org-latex-listings 'listings
        ;; org-latex-prefer-user-labels t
        )
  (add-to-list 'org-latex-packages-alist '("" "listings"))
  (add-to-list 'org-latex-packages-alist '("" "color"))
  (add-to-list 'org-latex-classes
               '("IEEEtran" "\\documentclass[11pt]{IEEEtran}"
                 ("\\section{%s}" . "\\section*{%s}")
                 ("\\subsection{%s}" . "\\subsection*{%s}")
                 ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
                 ("\\paragraph{%s}" . "\\paragraph*{%s}")
                 ("\\subparagraph{%s}" . "\\subparagraph*{%s}"))
               t))

(use-feature ox-beamer
  :after ox)
#+end_src

**** asynchronous tangle

=a/async-babel-tangle= is a function closely inspired by [[https://github.com/dieggsy/dotfiles/tree/cc10edf7701958eff1cd94d4081da544d882a28c/emacs.d#dotfiles][dieggsy's
d/async-babel-tangle]] which uses [[https://github.com/jwiegley/emacs-async][async]] to asynchronously tangle an org
file.

#+begin_src emacs-lisp
(with-eval-after-load 'org
  (defvar a/show-async-tangle-results nil
    "Keep *emacs* async buffers around for later inspection.")

  (defvar a/show-async-tangle-time nil
    "Show the time spent tangling the file.")

  (defvar a/async-tangle-post-compile "make ti"
    "If non-nil, pass to `compile' after successful tangle.")

  (defun a/async-babel-tangle ()
    "Tangle org file asynchronously."
    (interactive)
    (let* ((file-tangle-start-time (current-time))
           (file (buffer-file-name))
           (file-nodir (file-name-nondirectory file))
           ;; (async-quiet-switch "-q")
           )
      (async-start
       `(lambda ()
          (require 'org)
          (org-babel-tangle-file ,file))
       (unless a/show-async-tangle-results
         `(lambda (result)
            (if result
                (progn
                  (message "Tangled %s%s"
                           ,file-nodir
                           (if a/show-async-tangle-time
                               (format " (%.3fs)"
                                       (float-time (time-subtract (current-time)
                                                                  ',file-tangle-start-time)))
                             ""))
                  (when a/async-tangle-post-compile
                    (compile a/async-tangle-post-compile)))
              (message "Tangling %s failed" ,file-nodir))))))))

(add-to-list
 'safe-local-variable-values
 '(eval add-hook 'after-save-hook #'a/async-babel-tangle 'append 'local))
#+end_src

*** [[https://magit.vc/][Magit]]

#+begin_quote
It's Magit! A Git porcelain inside Emacs.
#+end_quote

Not just how I do git, but /the/ way to do git.

#+begin_src emacs-lisp
(use-package magit
  :defer 1
  :bind (("C-x g" . magit-status)
         ("s-g s" . magit-status)
         ("s-g l" . magit-log-buffer-file))
  :config
  (magit-add-section-hook 'magit-status-sections-hook
                          'magit-insert-modules
                          'magit-insert-stashes
                          'append)
  (setq
   magit-repository-directories '(("~/.emacs.d/" . 0)
                                  ("~/src/git/" . 1)))
  (nconc magit-section-initial-visibility-alist
         '(([unpulled status] . show)
           ([unpushed status] . show)))
  :custom-face (magit-diff-file-heading ((t (:weight normal)))))
#+end_src

*** recentf

Recently opened files.

#+begin_src emacs-lisp
(use-feature recentf
  :defer 0.5
  :config
  (add-to-list 'recentf-exclude "^/\\(?:ssh\\|su\\|sudo\\)?:")
  (setq recentf-max-saved-items 40))
#+end_src

*** [[https://github.com/abo-abo/swiper][Ivy]] (and friends)

#+begin_quote
Ivy - a generic completion frontend for Emacs, Swiper - isearch with
an overview, and more. Oh, man!
#+end_quote

There's no way I could top that, so I won't attempt to.

**** Ivy

#+begin_src emacs-lisp
(use-package ivy
  :defer 0.6
  :bind
  (:map ivy-minibuffer-map
   ([escape] . keyboard-escape-quit)
   ([S-up]   . ivy-previous-history-element)
   ([S-down] . ivy-next-history-element)
   ("DEL"    . ivy-backward-delete-char))
  :config
  (setq ivy-wrap t)
  (ivy-mode 1)
  ;; :custom-face
  ;; (ivy-minibuffer-match-face-2 ((t (:background "#e99ce8" :weight semi-bold))))
  ;; (ivy-minibuffer-match-face-3 ((t (:background "#bbbbff" :weight semi-bold))))
  ;; (ivy-minibuffer-match-face-4 ((t (:background "#ffbbff" :weight semi-bold))))
)
#+end_src

**** Swiper

#+begin_src emacs-lisp
(use-package swiper
  :after ivy
  :bind (("C-s"   . swiper)
         ("C-r"   . swiper)
         ("C-S-s" . isearch-forward)))
#+end_src

**** Counsel

#+begin_src emacs-lisp
(use-package counsel
  :after ivy
  :bind (([remap execute-extended-command] . counsel-M-x)
         ([remap find-file]                . counsel-find-file)
         ("s-r"                            . counsel-recentf)
         ("C-c x"                          . counsel-M-x)
         ("C-c f ."                        . counsel-find-file)
         :map minibuffer-local-map
         ("C-r" . counsel-minibuffer-history))
  :config
  (counsel-mode 1)
  (defalias 'locate #'counsel-locate))
#+end_src

*** eshell

#+begin_src emacs-lisp
(use-feature eshell
  :defer 1
  :commands eshell
  :bind ("C-c a s e" . eshell)
  :config
  (eval-when-compile (defvar eshell-prompt-regexp))
  (defun a/eshell-quit-or-delete-char (arg)
    (interactive "p")
    (if (and (eolp) (looking-back eshell-prompt-regexp nil))
        (eshell-life-is-too-much)
      (delete-char arg)))

  (defun a/eshell-clear ()
    (interactive)
    (let ((inhibit-read-only t))
      (erase-buffer))
    (eshell-send-input))

  (defun a/eshell-setup ()
    (make-local-variable 'company-idle-delay)
    (defvar company-idle-delay)
    (setq company-idle-delay nil)
    (bind-keys :map eshell-mode-map
               ("C-d"   . a/eshell-quit-or-delete-char)
               ("C-S-l" . a/eshell-clear)
               ("M-r"   . counsel-esh-history)
               ([tab]   . company-complete)))

  :hook (eshell-mode . a/eshell-setup)
  :custom
  (eshell-hist-ignoredups t)
  (eshell-input-filter 'eshell-input-filter-initial-space))
#+end_src

*** Ibuffer

#+begin_src emacs-lisp
(use-feature ibuffer
  :defer t
  :bind
  (("C-x C-b" . ibuffer-other-window)
   :map ibuffer-mode-map
   ("P"   . ibuffer-backward-filter-group)
   ("N"   . ibuffer-forward-filter-group)
   ("M-p" . ibuffer-do-print)
   ("M-n" . ibuffer-do-shell-command-pipe-replace))
  :config
  ;; Use human readable Size column instead of original one
  (define-ibuffer-column size-h
    (:name "Size" :inline t)
    (cond
     ((> (buffer-size) 1000000) (format "%7.1fM" (/ (buffer-size) 1000000.0)))
     ((> (buffer-size) 100000) (format "%7.0fk" (/ (buffer-size) 1000.0)))
     ((> (buffer-size) 1000) (format "%7.1fk" (/ (buffer-size) 1000.0)))
     (t (format "%8d" (buffer-size)))))
  :custom
  (ibuffer-saved-filter-groups
   '(("default"
      ("dired" (mode . dired-mode))
      ("org"   (mode . org-mode))
      ("gnus"
       (or
        (mode . gnus-group-mode)
        (mode . gnus-summary-mode)
        (mode . gnus-article-mode)
        ;; not really, but...
        (mode . message-mode)))
      ("web"
       (or
        (mode . web-mode)
        (mode . css-mode)
        (mode . scss-mode)
        (mode . js2-mode)))
      ("shell"
       (or
        (mode . eshell-mode)
        (mode . shell-mode)
        (mode . term-mode)))
      ("programming"
       (or
        (mode . python-mode)
        (mode . c-mode)
        (mode . c++-mode)
        (mode . emacs-lisp-mode)
        (mode . scheme-mode)
        (mode . haskell-mode)
        (mode . lean-mode)))
      ("emacs"
       (or
        (name . "^\\*scratch\\*$")
        (name . "^\\*Messages\\*$"))))))
  (ibuffer-formats
   '((mark modified read-only locked " "
           (name 18 18 :left :elide)
           " "
           (size-h 9 -1 :right)
           " "
           (mode 16 16 :left :elide)
           " " filename-and-process)
     (mark " "
           (name 16 -1)
           " " filename)))
  :hook (ibuffer . (lambda () (ibuffer-switch-to-saved-filter-groups "default"))))
#+end_src

*** Outline

#+begin_src emacs-lisp
(use-feature outline
  :defer t
  :hook (prog-mode . outline-minor-mode)
  :bind
  (:map
   outline-minor-mode-map
   ("<s-tab>"  . outline-toggle-children)
   ("M-p"      . outline-previous-visible-heading)
   ("M-n"      . outline-next-visible-heading)
   :prefix-map a/outline-prefix-map
   :prefix "s-o"
   ("TAB" . outline-toggle-children)
   ("a"   . outline-hide-body)
   ("H"   . outline-hide-body)
   ("S"   . outline-show-all)
   ("h"   . outline-hide-subtree)
   ("s"   . outline-show-subtree)))
#+end_src

*** Dired

#+begin_src emacs-lisp
(use-feature ls-lisp
  :custom (ls-lisp-dirs-first t))

(use-feature dired
  :defer t
  :config
  (setq dired-listing-switches "-alh"
        ls-lisp-use-insert-directory-program nil)

  ;; easily diff 2 marked files
  ;; https://oremacs.com/2017/03/18/dired-ediff/
  (defun dired-ediff-files ()
    (interactive)
    (defvar ediff-after-quit-hook-internal)
    (let ((files (dired-get-marked-files))
          (wnd (current-window-configuration)))
      (if (<= (length files) 2)
          (let ((file1 (car files))
                (file2 (if (cdr files)
                           (cadr files)
                         (read-file-name
                          "file: "
                          (dired-dwim-target-directory)))))
            (if (file-newer-than-file-p file1 file2)
                (ediff-files file2 file1)
              (ediff-files file1 file2))
            (add-hook 'ediff-after-quit-hook-internal
                      (lambda ()
                        (setq ediff-after-quit-hook-internal nil)
                        (set-window-configuration wnd))))
        (error "no more than 2 files should be marked"))))
  :bind (:map dired-mode-map
              ("e"  . dired-ediff-files)
              ("E"  . dired-toggle-read-only)
              ("\\" . dired-hide-details-mode)
              ("z"  . (lambda ()
                        (interactive)
                        (a/dired-start-process "zathura"))))
  :hook (dired-mode . dired-hide-details-mode))
#+end_src

*** Borg's =layer/essentials=
:PROPERTIES:
:CUSTOM_ID: borg-essentials
:END:

TODO: break this giant source block down into individual org sections.

#+begin_src emacs-lisp
(use-package dash
  :config (dash-enable-font-lock))

(use-feature eldoc
  :when (version< "25" emacs-version)
  :config (global-eldoc-mode))

(use-feature help
  :defer t
  :config
  (temp-buffer-resize-mode)
  (setq help-window-select t))

(progn ;    `isearch'
  (setq isearch-allow-scroll t))

(use-feature lisp-mode
  :config
  (add-hook 'emacs-lisp-mode-hook 'outline-minor-mode)
  (add-hook 'emacs-lisp-mode-hook 'reveal-mode)
  (defun indent-spaces-mode ()
    (setq indent-tabs-mode nil))
  (add-hook 'lisp-interaction-mode-hook #'indent-spaces-mode))

(use-feature man
  :defer t
  :config (setq Man-width 80))

(use-feature paren
  :config (show-paren-mode))

(use-feature prog-mode
  :config (global-prettify-symbols-mode)
  (defun indicate-buffer-boundaries-left ()
    (setq indicate-buffer-boundaries 'left))
  (add-hook 'prog-mode-hook #'indicate-buffer-boundaries-left))

(use-feature simple
  :config (column-number-mode))

(progn ;    `text-mode'
  (add-hook 'text-mode-hook #'indicate-buffer-boundaries-left)
  (add-hook 'text-mode-hook #'abbrev-mode))

(use-feature tramp
  :defer t
  :config
  (add-to-list 'tramp-default-proxies-alist '(nil "\\`root\\'" "/ssh:%h:"))
  (add-to-list 'tramp-default-proxies-alist '("localhost" nil nil))
  (add-to-list 'tramp-default-proxies-alist
               (list (regexp-quote (system-name)) nil nil)))

#+end_src

* Editing
:PROPERTIES:
:CUSTOM_ID: editing
:END:

** =diff-hl=

Highlight uncommitted changes in the left fringe.

#+begin_src emacs-lisp
(use-package diff-hl
  :config
  (setq diff-hl-draw-borders nil)
  (global-diff-hl-mode)
  :hook (magit-post-refresh . diff-hl-magit-post-refresh))
#+end_src

** =savehist=

Save minibuffer history.

#+begin_src emacs-lisp
(use-feature savehist
  :config (savehist-mode))
#+end_src

** =saveplace=

Automatically save place in each file.

#+begin_src emacs-lisp
(use-feature saveplace
  :when (version< "25" emacs-version)
  :config (save-place-mode))
#+end_src

** COMMENT Company

#+begin_src emacs-lisp
(use-package company
  :defer 1
  :bind
  (:map company-active-map
        ([tab]    . company-complete-common-or-cycle)
        ([escape] . company-abort))
  :custom
  (company-minimum-prefix-length 1)
  (company-selection-wrap-around t)
  (company-dabbrev-char-regexp "\\sw\\|\\s_\\|[-_]")
  (company-dabbrev-downcase nil)
  (company-dabbrev-ignore-case nil)
  :config
  (global-company-mode t))
#+end_src

* COMMENT Syntax and spell checking
:PROPERTIES:
:CUSTOM_ID: syntax-spell-checking
:END:

#+begin_src emacs-lisp
(use-package flycheck
  :defer 3
  :hook (prog-mode . flycheck-mode)
  :bind
  (:map flycheck-mode-map
        ("M-P" . flycheck-previous-error)
        ("M-N" . flycheck-next-error))
  :config
  ;; Use the load-path from running Emacs when checking elisp files
  (setq flycheck-emacs-lisp-load-path 'inherit)

  ;; Only flycheck when I actually save the buffer
  (setq flycheck-check-syntax-automatically '(mode-enabled save)))

;; http://endlessparentheses.com/ispell-and-apostrophes.html
(use-package ispell
  :defer 3
  :config
  ;; ’ can be part of a word
  (setq ispell-local-dictionary-alist
        `((nil "[[:alpha:]]" "[^[:alpha:]]"
               "['\x2019]" nil ("-B") nil utf-8)))
  ;; don't send ’ to the subprocess
  (defun endless/replace-apostrophe (args)
    (cons (replace-regexp-in-string
           "’" "'" (car args))
          (cdr args)))
  (advice-add #'ispell-send-string :filter-args
              #'endless/replace-apostrophe)

  ;; convert ' back to ’ from the subprocess
  (defun endless/replace-quote (args)
    (if (not (derived-mode-p 'org-mode))
        args
      (cons (replace-regexp-in-string
             "'" "’" (car args))
            (cdr args))))
  (advice-add #'ispell-parse-output :filter-args
              #'endless/replace-quote))
#+end_src

* COMMENT Programming modes
:PROPERTIES:
:CUSTOM_ID: programming-modes
:END:

** [[http://alloytools.org][Alloy]] (with [[https://github.com/dwwmmn/alloy-mode][alloy-mode]])

#+begin_src emacs-lisp
(use-package alloy-mode
  :defer t
  :config (setq alloy-basic-offset 2))
#+end_src

** [[https://coq.inria.fr][Coq]] (with [[https://github.com/ProofGeneral/PG][Proof General]])

#+begin_src emacs-lisp
(use-package proof-site  ; Proof General
  :defer t
  :load-path "lib/proof-site/generic/")
#+end_src

** [[https://leanprover.github.io][Lean]] (with [[https://github.com/leanprover/lean-mode][lean-mode]])

#+begin_src emacs-lisp
(eval-when-compile (defvar lean-mode-map))
(use-package lean-mode
  :defer 1
  :bind (:map lean-mode-map
              ("S-SPC" . company-complete))
  :config
  (require 'lean-input)
  (setq default-input-method "Lean"
        lean-input-tweak-all '(lean-input-compose
                               (lean-input-prepend "/")
                               (lean-input-nonempty))
        lean-input-user-translations '(("/" "/")))
  (lean-input-setup))
  #+end_src

** Haskell

*** [[https://github.com/haskell/haskell-mode][haskell-mode]]

#+begin_src emacs-lisp
(use-package haskell-mode
  :defer t
  :config
  (setq haskell-indentation-layout-offset 4
        haskell-indentation-left-offset 4
        flycheck-checker 'haskell-hlint
        flycheck-disabled-checkers '(haskell-stack-ghc haskell-ghc)))
#+end_src

*** [[https://github.com/jyp/dante][dante]]

#+begin_src emacs-lisp
(use-package dante
  :after haskell-mode
  :commands dante-mode
  :hook (haskell-mode . dante-mode))
#+end_src

*** [[https://github.com/mpickering/hlint-refactor-mode][hlint-refactor]]

Emacs bindings for [[https://github.com/ndmitchell/hlint][hlint]]'s refactor option. This requires the refact
executable from [[https://github.com/mpickering/apply-refact][apply-refact]].

#+begin_src emacs-lisp
(use-package hlint-refactor
  :after haskell-mode
  :bind (:map hlint-refactor-mode-map
              ("C-c l b" . hlint-refactor-refactor-buffer)
              ("C-c l r" . hlint-refactor-refactor-at-point))
  :hook (haskell-mode . hlint-refactor-mode))
#+end_src

*** [[https://github.com/flycheck/flycheck-haskell][flycheck-haskell]]

#+begin_src emacs-lisp
(use-package flycheck-haskell
  :after haskell-mode)
#+end_src

*** [[https://github.com/ndmitchell/hlint/blob/20e116a043f2073c57b17b24ae6364b5e433ba7e/data/hs-lint.el][hs-lint.el]]
:PROPERTIES:
:header-args+: :tangle lisp/hs-lint.el :mkdirp yes
:END:

Currently using =flycheck-haskell= with the =haskell-hlint= checker
instead.

#+begin_src emacs-lisp :tangle no
;;; hs-lint.el --- minor mode for HLint code checking

;; Copyright 2009 (C) Alex Ott
;;
;; Author: Alex Ott <alexott@gmail.com>
;; Keywords: haskell, lint, HLint
;; Requirements:
;; Status: distributed under terms of GPL2 or above

;; Typical message from HLint looks like:
;;
;; /Users/ott/projects/lang-exp/haskell/test.hs:52:1: Eta reduce
;; Found:
;;   count1 p l = length (filter p l)
;; Why not:
;;   count1 p = length . filter p


(require 'compile)

(defgroup hs-lint nil
  "Run HLint as inferior of Emacs, parse error messages."
  :group 'tools
  :group 'haskell)

(defcustom hs-lint-command "hlint"
  "The default hs-lint command for \\[hlint]."
  :type 'string
  :group 'hs-lint)

(defcustom hs-lint-save-files t
  "Save modified files when run HLint or no (ask user)"
  :type 'boolean
  :group 'hs-lint)

(defcustom hs-lint-replace-with-suggestions nil
  "Replace user's code with suggested replacements"
  :type 'boolean
  :group 'hs-lint)

(defcustom hs-lint-replace-without-ask nil
  "Replace user's code with suggested replacements automatically"
  :type 'boolean
  :group 'hs-lint)

(defun hs-lint-process-setup ()
  "Setup compilation variables and buffer for `hlint'."
  (run-hooks 'hs-lint-setup-hook))

;; regex for replace suggestions
;;
;; ^\(.*?\):\([0-9]+\):\([0-9]+\): .*
;; Found:
;; \s +\(.*\)
;; Why not:
;; \s +\(.*\)

(defvar hs-lint-regex
  "^\\(.*?\\):\\([0-9]+\\):\\([0-9]+\\): .*[\n\C-m]Found:[\n\C-m]\\s +\\(.*\\)[\n\C-m]Why not:[\n\C-m]\\s +\\(.*\\)[\n\C-m]"
  "Regex for HLint messages")

(defun make-short-string (str maxlen)
  (if (< (length str) maxlen)
      str
    (concat (substring str 0 (- maxlen 3)) "...")))

(defun hs-lint-replace-suggestions ()
  "Perform actual replacement of suggestions"
  (goto-char (point-min))
  (while (re-search-forward hs-lint-regex nil t)
    (let* ((fname (match-string 1))
          (fline (string-to-number (match-string 2)))
          (old-code (match-string 4))
          (new-code (match-string 5))
          (msg (concat "Replace '" (make-short-string old-code 30)
                       "' with '" (make-short-string new-code 30) "'"))
          (bline 0)
          (eline 0)
          (spos 0)
          (new-old-code ""))
      (save-excursion
        (switch-to-buffer (get-file-buffer fname))
        (goto-char (point-min))
        (forward-line (1- fline))
        (beginning-of-line)
        (setf bline (point))
        (when (or hs-lint-replace-without-ask
                  (yes-or-no-p msg))
          (end-of-line)
          (setf eline (point))
          (beginning-of-line)
          (setf old-code (regexp-quote old-code))
          (while (string-match "\\\\ " old-code spos)
            (setf new-old-code (concat new-old-code
                                 (substring old-code spos (match-beginning 0))
                                 "\\ *"))
            (setf spos (match-end 0)))
          (setf new-old-code (concat new-old-code (substring old-code spos)))
          (remove-text-properties bline eline '(composition nil))
          (when (re-search-forward new-old-code eline t)
            (replace-match new-code nil t)))))))

(defun hs-lint-finish-hook (buf msg)
  "Function, that is executed at the end of HLint execution"
  (if hs-lint-replace-with-suggestions
      (hs-lint-replace-suggestions)
      (next-error 1 t)))

(define-compilation-mode hs-lint-mode "HLint"
  "Mode for check Haskell source code."
  (set (make-local-variable 'compilation-process-setup-function)
       'hs-lint-process-setup)
  (set (make-local-variable 'compilation-disable-input) t)
  (set (make-local-variable 'compilation-scroll-output) nil)
  (set (make-local-variable 'compilation-finish-functions)
       (list 'hs-lint-finish-hook))
  )

(defun hs-lint ()
  "Run HLint for current buffer with haskell source"
  (interactive)
  (save-some-buffers hs-lint-save-files)
  (compilation-start (concat hs-lint-command " \"" buffer-file-name "\"")
                     'hs-lint-mode))

(provide 'hs-lint)
;;; hs-lint.el ends here
#+end_src

#+begin_src emacs-lisp :tangle no
(use-package hs-lint
  :load-path "lisp/"
  :bind (:map haskell-mode-map
              ("C-c l l" . hs-lint)))
#+end_src

** Web dev

*** SGML and HTML

#+begin_src emacs-lisp
(use-package sgml-mode
  :defer t
  :config
  (setq sgml-basic-offset 2))
#+end_src

*** CSS and SCSS

#+begin_src emacs-lisp
(use-package css-mode
  :defer t
  :config
  (setq css-indent-offset 2))
#+end_src

*** Web mode

#+begin_src emacs-lisp
(use-package web-mode
  :defer t
  :mode "\\.html\\'"
  :config
  (a/setq-every 2
    web-mode-code-indent-offset
    web-mode-css-indent-offset
    web-mode-markup-indent-offset))
#+end_src

*** Emmet mode

#+begin_src emacs-lisp
(use-package emmet-mode
  :after (:any web-mode css-mode sgml-mode)
  :bind* (("C-)" . emmet-next-edit-point)
          ("C-(" . emmet-prev-edit-point))
  :config
  (unbind-key "C-j" emmet-mode-keymap)
  (setq emmet-move-cursor-between-quotes t)
  :hook (web-mode css-mode html-mode sgml-mode))
#+end_src

** COMMENT Java

*** meghanada

#+begin_src emacs-lisp
(use-package meghanada
  :bind
  (:map meghanada-mode-map
        (("C-M-o" . meghanada-optimize-import)
         ("C-M-t" . meghanada-import-all)))
  :hook (java-mode . meghanada-mode))
#+end_src

*** lsp-java

#+begin_comment
dependencies:

ace-window
avy
bui
company-lsp
dap-mode
lsp-java
lsp-mode
lsp-ui
pfuture
tree-mode
treemacs
#+end_comment

#+begin_src emacs-lisp
(use-package treemacs
  :config (setq treemacs-never-persist t))

(use-package yasnippet
  :config
  ;; (yas-global-mode)
  )

(use-package lsp-mode
  :init (setq lsp-eldoc-render-all nil
              lsp-highlight-symbol-at-point nil)
  )

(use-package hydra)

(use-package company-lsp
  :after  company
  :config
  (setq company-lsp-cache-candidates t
        company-lsp-async t))

(use-package lsp-ui
  :config
  (setq lsp-ui-sideline-update-mode 'point))

(use-package lsp-java
  :config
  (add-hook 'java-mode-hook
	    (lambda ()
	      (setq-local company-backends (list 'company-lsp))))

  (add-hook 'java-mode-hook 'lsp-java-enable)
  (add-hook 'java-mode-hook 'flycheck-mode)
  (add-hook 'java-mode-hook 'company-mode)
  (add-hook 'java-mode-hook 'lsp-ui-mode))

(use-package dap-mode
  :after lsp-mode
  :config
  (dap-mode t)
  (dap-ui-mode t))

(use-package dap-java
  :after (lsp-java))

(use-package lsp-java-treemacs
  :after (treemacs))
#+end_src

** geiser

#+begin_src emacs-lisp
(use-package geiser)

(use-package geiser-guile
  :config
  (setq geiser-guile-load-path "~/src/git/guix"))
#+end_src

** guix

#+begin_src emacs-lisp
(use-package guix
  :load-path "lib/guix/elisp")
#+end_src

* COMMENT Emacs enhancements
:PROPERTIES:
:CUSTOM_ID: emacs-enhancements
:END:

** [[https://github.com/justbur/emacs-which-key][which-key]]

#+begin_quote
Emacs package that displays available keybindings in popup
#+end_quote

#+begin_src emacs-lisp
(use-package which-key
  :defer 1
  :config
  (which-key-add-key-based-replacements
    ;; prefixes for global prefixes and minor modes
    "C-c @"   "outline"
    "C-c !"   "flycheck"
    "C-c 8"   "typo"
    "C-c 8 -" "typo/dashes"
    "C-c 8 <" "typo/left-brackets"
    "C-c 8 >" "typo/right-brackets"
    "C-x 8"   "unicode"
    "C-x a"   "abbrev/expand"
    "C-x r"   "rectangle/register/bookmark"
    "C-x v"   "version control"
    ;; prefixes for my personal bindings
    "C-c a"   "applications"
    "C-c a s" "shells"
    "C-c b"   "borg"
    "C-c c"   "compile-and-comments"
    "C-c e"   "eval"
    "C-c f"   "files"
    "C-c F"   "frames"
    "C-S-h"   "help(ful)"
    "C-c m"   "multiple-cursors"
    "C-c p"   "projectile"
    "C-c p s" "projectile/search"
    "C-c p x" "projectile/execute"
    "C-c p 4" "projectile/other-window"
    "C-c q"   "boxquote"
    "s-g"     "magit"
    "s-o"     "outline"
    "s-t"     "themes")

  ;; prefixes for major modes
  (which-key-add-major-mode-key-based-replacements 'message-mode
    "C-c f"   "footnote")
  (which-key-add-major-mode-key-based-replacements 'org-mode
    "C-c C-v" "org-babel")
  (which-key-add-major-mode-key-based-replacements 'web-mode
    "C-c C-a" "web/attributes"
    "C-c C-b" "web/blocks"
    "C-c C-d" "web/dom"
    "C-c C-e" "web/element"
    "C-c C-t" "web/tags")

  (which-key-mode))
#+end_src

** theme

#+begin_src emacs-lisp
(add-to-list 'custom-theme-load-path "~/.emacs.d/lisp")
(load-theme 'tangomod t)
#+end_src

** smart-mode-line

#+begin_src emacs-lisp
(use-package smart-mode-line
  :config
  (sml/setup))
#+end_src

** doom-themes

#+begin_src emacs-lisp
(use-package doom-themes)
#+end_src

** theme helper functions

#+begin_src emacs-lisp
(defun a/lights-on ()
  "Enable my favourite light theme."
  (interactive)
  (mapc #'disable-theme custom-enabled-themes)
  (load-theme 'tangomod t)
  (sml/apply-theme 'automatic))

(defun a/lights-off ()
  "Go dark."
  (interactive)
  (mapc #'disable-theme custom-enabled-themes)
  (load-theme 'doom-tomorrow-night t)
  (sml/apply-theme 'automatic))

(bind-keys
 ("s-t d" . a/lights-off)
 ("s-t l" . a/lights-on))
#+end_src

** [[https://github.com/bbatsov/crux][crux]]

#+begin_src emacs-lisp
(use-package crux
  :defer 1
  :bind (("C-c b k" . crux-kill-other-buffers)
         ("C-c d"   . crux-duplicate-current-line-or-region)
         ("C-c D"   . crux-duplicate-and-comment-current-line-or-region)
         ("C-c f c" . crux-copy-file-preserve-attributes)
         ("C-c f d" . crux-delete-file-and-buffer)
         ("C-c f r" . crux-rename-file-and-buffer)
         ("C-c j"   . crux-top-join-line)
         ("C-S-j"   . crux-top-join-line)))
#+end_src

** [[https://github.com/alezost/mwim.el][mwim]]

#+begin_src emacs-lisp
(use-package mwim
  :bind (("C-a"    . mwim-beginning-of-code-or-line)
         ("C-e"    . mwim-end-of-code-or-line)
         ("<home>" . mwim-beginning-of-line-or-code)
         ("<end>"  . mwim-end-of-line-or-code)))
#+end_src

** projectile

#+begin_src emacs-lisp
(use-package projectile
  :defer t
  :bind-keymap ("C-c p" . projectile-command-map)
  :config
  (projectile-mode)

  (defun my-projectile-invalidate-cache (&rest _args)
    ;; ignore the args to `magit-checkout'
    (projectile-invalidate-cache nil))

  (eval-after-load 'magit-branch
    '(progn
       (advice-add 'magit-checkout
                   :after #'my-projectile-invalidate-cache)
       (advice-add 'magit-branch-and-checkout
                   :after #'my-projectile-invalidate-cache)))
  :custom (projectile-completion-system 'ivy))
#+end_src

** [[https://github.com/Wilfred/helpful][helpful]]

#+begin_src emacs-lisp
(use-package helpful
  :defer 1
  :bind
  (("C-S-h c" . helpful-command)
   ("C-S-h f" . helpful-callable)        ; helpful-function
   ("C-S-h v" . helpful-variable)
   ("C-S-h k" . helpful-key)
   ("C-S-h p" . helpful-at-point)))
#+end_src

** [[https://github.com/EricCrosson/unkillable-scratch][unkillable-scratch]]

Make =*scratch*= and =*Messages*= unkillable.

#+begin_src emacs-lisp
(use-package unkillable-scratch
  :defer 3
  :config
  (unkillable-scratch 1)
  :custom
  (unkillable-scratch-behavior 'do-nothing)
  (unkillable-buffers '("^\\*scratch\\*$" "^\\*Messages\\*$")))
#+end_src

** [[https://github.com/davep/boxquote.el][boxquote.el]]

#+begin_example
,----
| make pretty boxed quotes like this
`----
#+end_example

#+begin_src emacs-lisp
(use-package boxquote
  :defer 3
  :bind
  (:prefix-map a/boxquote-prefix-map
   :prefix "C-c q"
   ("b"   . boxquote-buffer)
   ("B"   . boxquote-insert-buffer)
   ("d"   . boxquote-defun)
   ("F"   . boxquote-insert-file)
   ("hf"  . boxquote-describe-function)
   ("hk"  . boxquote-describe-key)
   ("hv"  . boxquote-describe-variable)
   ("hw"  . boxquote-where-is)
   ("k"   . boxquote-kill)
   ("p"   . boxquote-paragraph)
   ("q"   . boxquote-boxquote)
   ("r"   . boxquote-region)
   ("s"   . boxquote-shell-command)
   ("t"   . boxquote-text)
   ("T"   . boxquote-title)
   ("u"   . boxquote-unbox)
   ("U"   . boxquote-unbox-region)
   ("y"   . boxquote-yank)
   ("M-q" . boxquote-fill-paragraph)
   ("M-w" . boxquote-kill-ring-save)))
#+end_src

Also see [[https://www.emacswiki.org/emacs/rebox2][rebox2]].

** orgalist

#+begin_src emacs-lisp
(use-package orgalist
  :after message
  :hook (message-mode . orgalist-mode))
#+end_src

** typo.el

#+begin_src emacs-lisp
(use-package typo
  :defer 2
  :config
  (typo-global-mode 1)
  :hook (text-mode . typo-mode))
#+end_src

** hl-todo

#+begin_src emacs-lisp
(use-package hl-todo
  :defer 4
  :config
  (global-hl-todo-mode))
#+end_src

** shrink-path

#+begin_src emacs-lisp
(use-package shrink-path
  :after eshell
  :config
  (setq eshell-prompt-regexp "\\(.*\n\\)*λ "
        eshell-prompt-function #'+eshell/prompt)

  (defun +eshell/prompt ()
    (let ((base/dir (shrink-path-prompt default-directory)))
      (concat (propertize (car base/dir)
                          'face 'font-lock-comment-face)
              (propertize (cdr base/dir)
                          'face 'font-lock-constant-face)
              (propertize (+eshell--current-git-branch)
                          'face 'font-lock-function-name-face)
              "\n"
              (propertize "λ" 'face 'eshell-prompt-face)
              ;; needed for the input text to not have prompt face
              (propertize " " 'face 'default))))

  (defun +eshell--current-git-branch ()
    (let ((branch (car (loop for match in (split-string (shell-command-to-string "git branch") "\n")
                             when (string-match "^\*" match)
                             collect match))))
      (if (not (eq branch nil))
          (concat " " (substring branch 2))
        ""))))
#+end_src

** [[https://github.com/peterwvj/eshell-up][eshell-up]]

#+begin_src emacs-lisp
(use-package eshell-up
  :after eshell)
#+end_src

** multi-term

#+begin_src emacs-lisp
(use-package multi-term
  :defer 1
  :bind (("C-c a s m" . multi-term-dedicated-toggle)
         :map term-mode-map
         ("C-c C-j" . term-char-mode)
         :map term-raw-map
         ("C-c C-j" . term-line-mode))
  :config
  (setq multi-term-program "/bin/screen"
        ;; TODO: add separate bindings for connecting to existing
        ;; session vs. always creating a new one
        multi-term-dedicated-select-after-open-p t
        multi-term-dedicated-window-height 20
        multi-term-dedicated-max-window-height 30
        term-bind-key-alist
        '(("C-c C-c" . term-interrupt-subjob)
          ("C-c C-e" . term-send-esc)
          ("C-k" . kill-line)
          ("C-y" . term-paste)
          ("M-f" . term-send-forward-word)
          ("M-b" . term-send-backward-word)
          ("M-p" . term-send-up)
          ("M-n" . term-send-down)
          ("<C-backspace>" . term-send-backward-kill-word)
          ("<M-DEL>" . term-send-backward-kill-word)
          ("M-d" . term-send-delete-word)
          ("M-," . term-send-raw)
          ("M-." . comint-dynamic-complete))
        term-unbind-key-alist
        '("C-z" "C-x" "C-c" "C-h" "C-y" "<ESC>")))
#+end_src

** page-break-lines

#+begin_src emacs-lisp
(use-package page-break-lines
  :config
  (global-page-break-lines-mode))
#+end_src

** expand-region

#+begin_src emacs-lisp
(use-package expand-region
  :bind ("C-=" . er/expand-region))
#+end_src

** multiple-cursors

#+begin_src emacs-lisp
(use-package multiple-cursors
  :bind
  (("C-S-<mouse-1>" . mc/add-cursor-on-click)
   (:prefix-map a/mc-prefix-map
               :prefix "C-c m"
               ("c" . mc/edit-lines)
               ("n" . mc/mark-next-like-this)
               ("p" . mc/mark-previous-like-this)
               ("a" . mc/mark-all-like-this))))
#+end_src

* COMMENT Email
:PROPERTIES:
:CUSTOM_ID: email
:END:

#+begin_src emacs-lisp
(defvar a/maildir (expand-file-name "~/mail/"))
(with-eval-after-load 'recentf
  (add-to-list 'recentf-exclude a/maildir))
#+end_src

** Gnus

#+begin_src emacs-lisp
(setq
 a/gnus-init-file  (no-littering-expand-etc-file-name "gnus")
 mail-user-agent   'gnus-user-agent
 read-mail-command 'gnus)

(use-package gnus
  :bind (("s-m"   . gnus)
         ("s-M"   . gnus-unplugged))
  :init
  (setq
   gnus-select-method '(nnnil "")
   gnus-secondary-select-methods
   '((nnimap "amin"
            (nnimap-stream plain)
            (nnimap-address "127.0.0.1")
            (nnimap-server-port 143)
            (nnimap-authenticator plain)
            (nnimap-user "amin@aminb.org"))
     (nnimap "uwaterloo"
             (nnimap-stream plain)
             (nnimap-address "127.0.0.1")
             (nnimap-server-port 143)
             (nnimap-authenticator plain)
             (nnimap-user "abandali@uwaterloo.ca")))
   gnus-message-archive-group "nnimap+amin:Sent"
   gnus-parameters
   '(("gnu.*"
      (gcc-self . t)))
   gnus-large-newsgroup  50
   gnus-home-directory   (no-littering-expand-var-file-name "gnus/")
   gnus-directory        (concat gnus-home-directory "news/")
   message-directory     (concat gnus-home-directory "mail/")
   nndraft-directory     (concat gnus-home-directory "drafts/")
   gnus-save-newsrc-file nil
   gnus-read-newsrc-file nil
   gnus-interactive-exit nil
   gnus-gcc-mark-as-read t))

(use-package gnus-art
  :config
  (setq
   gnus-visible-headers
   (concat gnus-visible-headers "\\|^List-Id:\\|^X-RT-Originator:\\|^User-Agent:")
   gnus-sorted-header-list
   '("^From:" "^Subject:" "^Summary:" "^Keywords:"
     "^Followup-To:" "^To:" "^Cc:" "X-RT-Originator"
     "^Newsgroups:" "List-Id:" "^Organization:"
     "^User-Agent:" "^Date:")
  ;; local-lapsed article dates
  ;; from https://www.emacswiki.org/emacs/GnusFormatting#toc11
  gnus-article-date-headers '(user-defined)
  gnus-article-time-format
  (lambda (time)
    (let* ((date (format-time-string "%a, %d %b %Y %T %z" time))
           (local (article-make-date-line date 'local))
           (combined-lapsed (article-make-date-line date
                                                    'combined-lapsed))
           (lapsed (progn
                     (string-match " (.+" combined-lapsed)
                     (match-string 0 combined-lapsed))))
      (concat local lapsed))))
  (bind-keys
   :map gnus-article-mode-map
   ("r"   . gnus-article-reply-with-original)
   ("R"   . gnus-article-wide-reply-with-original)
   ("M-L" . org-store-link)))

(use-package gnus-sum
  :bind (:map gnus-summary-mode-map
              :prefix-map a/gnus-summary-prefix-map
              :prefix "v"
              ("r" . gnus-summary-reply)
              ("w" . gnus-summary-wide-reply)
              ("v" . gnus-summary-show-raw-article))
  :config
  (bind-keys
   :map gnus-summary-mode-map
   ("r"   . gnus-summary-reply-with-original)
   ("R"   . gnus-summary-wide-reply-with-original)
   ("M-L" . org-store-link))
  :hook (gnus-summary-mode . a/no-mouse-autoselect-window))

(use-package gnus-msg
  :config
  (setq gnus-posting-styles
        '((".*"
           (address "amin@aminb.org")
           (body "\nBest,\namin\n")
           (eval (setq a/message-cite-say-hi t)))
          ("gnu.*"
           (address "bandali@gnu.org"))
          ((header "subject" "ThankCRM")
           (to "webmasters-comment@gnu.org")
           (body "\nAdded  to 2018supporters.html.\n\nMoving to campaigns.\n\n-amin\n")
           (eval (setq a/message-cite-say-hi nil)))
          ("nnimap\\+uwaterloo:.*"
           (address "abandali@uwaterloo.ca")
           (gcc "\"nnimap+uwaterloo:Sent Items\"")))))

(use-package gnus-topic
  :hook (gnus-group-mode . gnus-topic-mode))

(use-package gnus-agent
  :config
  (setq gnus-agent-synchronize-flags 'ask)
  :hook (gnus-group-mode . gnus-agent-mode))

(use-package gnus-group
  :config
  (setq gnus-permanently-visible-groups "\\((INBOX\\|gnu$\\)"))

(use-package mm-decode
  :config
  (setq mm-discouraged-alternatives '("text/html" "text/richtext")))
#+end_src

** sendmail

#+begin_src emacs-lisp
(use-package sendmail
  :config
  (setq sendmail-program "/usr/bin/msmtp"
        ;; message-sendmail-extra-arguments '("-v" "-d")
        mail-specify-envelope-from t
        mail-envelope-from 'header))
#+end_src

** message

#+begin_src emacs-lisp
(use-package message
  :config
  (defconst a/message-cite-style-format "On %Y-%m-%d %l:%M %p, %N wrote:")
  (defconst message-cite-style-bandali
    '((message-cite-function  'message-cite-original)
      (message-citation-line-function  'message-insert-formatted-citation-line)
      (message-cite-reply-position 'traditional)
      (message-yank-prefix  "> ")
      (message-yank-cited-prefix  ">")
      (message-yank-empty-prefix  ">")
      (message-citation-line-format
       (if a/message-cite-say-hi
           (concat "Hi %F,\n\n" a/message-cite-style-format)
         a/message-cite-style-format)))
    "Citation style based on Mozilla Thunderbird's. Use with message-cite-style.")
  (setq message-cite-style 'message-cite-style-bandali
        message-kill-buffer-on-exit t
        message-send-mail-function 'message-send-mail-with-sendmail
        message-sendmail-envelope-from 'header
        message-dont-reply-to-names
        "\\(\\(.*@aminb\\.org\\)\\|\\(amin@bandali\\.me\\)\\|\\(\\(aminb?\\|mab\\|bandali\\)@gnu\\.org\\)\\|\\(\\(m\\|a\\(min\\.\\)?\\)bandali@uwaterloo\\.ca\\)\\)"
        message-user-fqdn "aminb.org")
  :hook (;; (message-setup . mml-secure-message-sign-pgpmime)
         (message-mode . flyspell-mode)
         (message-mode . (lambda ()
                           ;; (setq fill-column 65
                           ;;       message-fill-column 65)
                           (make-local-variable 'company-idle-delay)
                           (setq company-idle-delay 0.2))))
  ;; :custom-face
  ;; (message-header-subject ((t (:foreground "#111" :weight semi-bold))))
  ;; (message-header-to      ((t (:foreground "#111" :weight normal))))
  ;; (message-header-cc      ((t (:foreground "#333" :weight normal))))
  )

(with-eval-after-load 'mml-sec
  (setq mml-secure-openpgp-encrypt-to-self t
        mml-secure-openpgp-sign-with-sender t))
#+end_src

** footnote

Convenient footnotes in =message-mode=.

#+begin_src emacs-lisp
(use-package footnote
  :after message
  :bind
  (:map message-mode-map
        :prefix-map a/footnote-prefix-map
        :prefix "C-c f"
        ("a" . footnote-add-footnote)
        ("b" . footnote-back-to-message)
        ("c" . footnote-cycle-style)
        ("d" . footnote-delete-footnote)
        ("g" . footnote-goto-footnote)
        ("r" . footnote-renumber-footnotes)
        ("s" . footnote-set-style))
  :config
  (setq footnote-start-tag ""
        footnote-end-tag   ""
        footnote-style     'unicode))
#+end_src

** ebdb

#+begin_src emacs-lisp
(use-package ebdb
  :defer 1
  :bind (:map gnus-group-mode-map ("e" . ebdb))
  :config
  (setq ebdb-sources (no-littering-expand-var-file-name "ebdb"))
  (with-eval-after-load 'swiper
    (add-to-list 'swiper-font-lock-exclude 'ebdb-mode t)))

(use-package ebdb-com
  :after ebdb)

;; (use-package ebdb-complete
;;   :after ebdb
;;   :config
;;   (ebdb-complete-enable))

(use-package company-ebdb
  :after (:all company message)
  :config
  (defun company-ebdb--post-complete (_) nil)
  :hook
  (message-mode . (lambda ()
                    (add-to-list (make-local-variable 'company-backends)
                                 'company-ebdb))))

(use-package ebdb-gnus
  :after ebdb
  :custom
  (ebdb-gnus-window-configuration
   '(article
     (vertical 1.0
               (summary 0.25 point)
               (horizontal 1.0
                           (article 1.0)
                           (ebdb-gnus 0.3))))))

(use-package ebdb-mua
  :after ebdb
  ;; :custom (ebdb-mua-pop-up nil)
  )

;; (use-package ebdb-message
;;   :after ebdb)


;; (use-package ebdb-vcard
;;   :after ebdb)
#+end_src

** COMMENT message-x

#+begin_src emacs-lisp
(use-package message-x
  :custom
  (message-x-completion-alist
   (quote
    (("\\([rR]esent-\\|[rR]eply-\\)?[tT]o:\\|[bB]?[cC][cC]:" . gnus-harvest-find-address)
     ((if
          (boundp
           (quote message-newgroups-header-regexp))
          message-newgroups-header-regexp message-newsgroups-header-regexp)
      . message-expand-group)))))
#+end_src

** COMMENT gnus-harvest

#+begin_src emacs-lisp
(use-package gnus-harvest
  :commands gnus-harvest-install
  :demand t
  :config
  (if (featurep 'message-x)
      (gnus-harvest-install 'message-x)
    (gnus-harvest-install)))
#+end_src

* COMMENT Blogging
:PROPERTIES:
:CUSTOM_ID: blogging
:END:

** [[https://ox-hugo.scripter.co][ox-hugo]]

#+begin_src emacs-lisp
(use-package ox-hugo
  :after ox)

(use-package ox-hugo-auto-export
  :load-path "lib/ox-hugo")
#+end_src

* Post initialization
:PROPERTIES:
:CUSTOM_ID: post-initialization
:END:

Display how long it took to load the init file.

#+begin_src emacs-lisp
(message "Loading %s...done (%.3fs)" user-init-file
         (float-time (time-subtract (current-time)
                                    a/before-user-init-time)))
#+end_src

* Footer
:PROPERTIES:
:CUSTOM_ID: footer
:END:

#+begin_src emacs-lisp :comments none
;;; init.el ends here
#+end_src

* COMMENT Local Variables                                           :ARCHIVE:
# Local Variables:
# eval: ;; (add-hook 'after-save-hook #'a/async-babel-tangle 'append 'local)
# eval: (typo-mode -1)
# End: