#+TITLE: Emacs config
#+AUTHOR: Case Duckworth
#+BABEL: :cache yes
#+PROPERTY: header-args :tangle init.el
#+BANKRUPTCY_COUNT: 1

* Preamble

I wanted to write my Emacs configuration in [[https://orgmode.org][Org mode]] for a while, but never could quite figure out how.  Finally, I found [[https://github.com/larstvei/dot-emacs][Lars Tveito]]'s config, which does exactly what I want: =init.el= is small and simple, and replaced after the first run, and =init.org= is automatically tangled.  So I'm very excited.

* Bootstrap

/Check out Lars's config for the reasoning behind this./

When this configuration is loaded for the first time, this ~init.el~ is loaded:

#+BEGIN_SRC emacs-lisp :tangle no
  ;; This file replaces itself with the actual configuration when first run.  To keep only this version in git, run this command:
  ;; git update-index --assume-unchanged init.el
  ;;
  ;; If it needs to be changed, start tracking it again thusly:
  ;; git update-index --no-assume-unchanged init.el

  (require 'org)
  (find-file (concat user-emacs-directory "init.org"))
  (org-babel-tangle)
  (load-file (concat user-emacs-directory "early-init.el"))
  (load-file (concat user-emacs-directory "init.el"))
  (byte-compile-file (concat user-emacs-directory "init.el"))
#+END_SRC

** Tangling
After the first run, the above ~init.el~ will be replaced by the tangled stuff here.  However, when /this/ file is edited, we'll need to re-tangle everything.  However, nobody has time to do that manually with =C-c C-v t=, /every time/!  Luckily, Emacs is highly programmable.

#+NAME: tangle-on-save
#+BEGIN_SRC emacs-lisp :tangle no
  (defun acdw/tangle-init ()
    "If the current buffer is `init.org', the code blocks are tangled,
    and the tangled file is compiled and loaded."
    (interactive)
    (when (equal (buffer-file-name)
                 (expand-file-name (concat user-emacs-directory "config.org")))
      ;; Avoid running hooks when tangling.
      (let ((prog-mode-hook nil))
        (org-babel-tangle))))

  (add-hook 'after-save-hook #'acdw/tangle-init)
#+END_SRC

* Early initiation
Emacs 27.1+ uses ~early-init.el~, which is evaluated before things like ~package.el~ and other stuff.  So I have a few settings in there.

** Preamble
Of course, first thing is the modeline.  After that, I set ~load-prefer-newer~ because, well, it /should/.
#+BEGIN_SRC emacs-lisp :tangle early-init.el
  ;;; early-init.el -*- lexical-binding: t; no-byte-compile: t -*-

(setq load-prefer-newer t)
#+END_SRC

** Computers
I have to set these constants before bootstrapping the package manager, since ~straight.el~ depends on Git, and at work, those are in a weird place.

#+BEGIN_SRC emacs-lisp :tangle early-init.el
  (defconst *acdw/at-work* (eq system-type 'windows-nt))
  (defconst *acdw/at-larry* (string= (system-name) "larry"))
  (defconst *acdw/at-bax* (string= (system-name) "bax"))
  (defconst *acdw/at-home* (or *acdw/at-larry* *acdw/at-bax*))
#+END_SRC

** Package management
 I've started using straight.el, which is great.  It grabs packages from git, and apparently will let me fork and edit them, which I'll probably get around to ... eventually.

*** At work, Git's in a weird place
#+BEGIN_SRC emacs-lisp :tangle early-init.el
  (when *acdw/at-work*
    (add-to-list 'exec-path "~/bin")
    (add-to-list 'exec-path "C:/Users/aduckworth/Downloads/PortableGit/bin"))
#+END_SRC

*** [[https://github.com/raxod502/straight.el][straight.el]]
I don't know why, but for some reason the bootstrapping doesn't work on Windows.  I have to download the repo directly from github and put it in the right place (=~/.emacs.d/straight/repos/straight.el/=).

#+BEGIN_SRC emacs-lisp :tangle early-init.el
  (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))
#+END_SRC

*** [[https://github.com/jwiegley/use-package][use-package]]
Yeah, you know it, I know it, we all love it.  It's use-package.
#+BEGIN_SRC emacs-lisp :tangle early-init.el
  (setq straight-use-package-by-default t)
  (straight-use-package 'use-package)
#+END_SRC
* Begin init.el
#+BEGIN_SRC emacs-lisp :noweb tangle
  ;;; init.el -*- lexical-binding: t; coding: utf-8 -*-
  <<tangle-on-save>>
#+END_SRC
* Macros
** cuss
I like ~use-package~,  but I don't like doing the weird "pseudo-package" stuff a lot of people do in their emacs configs.  Partially because I have to set ~:straight nil~ on a lot of built-in packages, but also because I think being /that/ obsessive over one interface through the whole config is ... I don't know, short-sighted?

Either way, I /do/ like the ~:custom~ interface that ~use-package~ has, so I've re-implemented it in my own macro.  This way I don't have to worry about whether to ~setq~ or ~custom-set-variable~ or whatever.  Just ~cuss~!
#+BEGIN_SRC emacs-lisp
  (defmacro cuss (var val)
    "Basically `use-package''s `:custom', but without either."
    `(progn
       (funcall (or (get ',var 'custom-set) #'set-default)
                ',var ,val)))
#+END_SRC
* Files
** [[https://github.com/emacscollective/no-littering][Keep .emacs.d tidy]]
#+BEGIN_SRC emacs-lisp
  (straight-use-package 'no-littering)
  (require 'no-littering)
#+END_SRC
** Customize
I don't like the customize interface, but I still sometimes use it when I'm not sure what the name of a variable is.  So I save the stuff to a file, I just don't load it or keep track of it.
#+BEGIN_SRC emacs-lisp
  (cuss custom-file (no-littering-expand-etc-file-name "custom.el"))
#+END_SRC
** Encoding
#+BEGIN_SRC emacs-lisp
  (prefer-coding-system 'utf-8-unix)
  (set-default-coding-systems 'utf-8-unix)
  (set-terminal-coding-system 'utf-8-unix)
  (set-keyboard-coding-system 'utf-8-unix)
  (set-selection-coding-system 'utf-8-unix)
  (set-file-name-coding-system 'utf-8-unix)
  (set-clipboard-coding-system 'utf-8-unix)
  (set-buffer-file-coding-system 'utf-8-unix)
  (cuss locale-coding-system 'utf-8)
  (cuss x-select-request-type '(UTF8_STRING COMPOUND_TEXT TEXT STRING))
#+END_SRC
** Recent files
#+BEGIN_SRC emacs-lisp
  (use-package recentf
    :config
    (add-to-list 'recentf-exclude no-littering-var-directory)
    (add-to-list 'recentf-exclude no-littering-etc-directory)
    :custom
    (recentf-max-menu-items 100)
    (recentf-max-saved-items 100)
    :config
    (recentf-mode 1))
#+END_SRC
** Backups
#+BEGIN_SRC emacs-lisp
  (cuss backup-directory-alist
        `((".*" . ,(no-littering-expand-var-file-name "backup/"))))
#+END_SRC
** [[https://github.com/bbatsov/super-save][Autosave]]
#+BEGIN_SRC emacs-lisp
  (use-package super-save
    :custom
    (auto-save-default nil)
    (super-save-auto-save-when-idle t)
    (super-save-exclude '(".gpg"))
    :config
    (super-save-mode 1))
#+END_SRC
** [[https://www.emacswiki.org/emacs/SavePlace][Save places]]
#+BEGIN_SRC emacs-lisp
  (use-package saveplace
    :custom
    (save-place-file (no-littering-expand-var-file-name "places"))
    (save-place-forget-unreadable-files (not *acdw/at-work*))
    :config
    (save-place-mode 1))
#+END_SRC
** [[https://www.emacswiki.org/emacs/SaveHist][Save history]]
#+BEGIN_SRC emacs-lisp
  (use-package savehist
    :custom
    (savehist-addtional-variables
     '(kill-ring
       search-ring
       regexp-search-ring))
    (savehist-save-minibuffer-history t)
    :config
    (savehist-mode 1))
#+END_SRC
* User interface
** Look
*** Frames and windows
**** Frame defaults
#+BEGIN_SRC emacs-lisp
  (cuss default-frame-alist '((tool-bar-lines . 0)
                              (menu-bar-lines . 0)
                              (vertical-scroll-bars . nil)
                              (horizontal-scroll-bars . nil)
                              (right-divider-width . 2)
                              (bottom-divider-width . 2)
                              (left-fringe-width . 2)
                              (right-fringe-width . 2)))

  ;; also disable these with modes, so I can re-enable them more easily
  (menu-bar-mode -1)
  (tool-bar-mode -1)
  (scroll-bar-mode -1)
#+END_SRC
**** Resizing
#+BEGIN_SRC emacs-lisp
  (cuss frame-resize-pixelwise t)
  (cuss window-combination-resize t)
#+END_SRC
*** Buffers
#+BEGIN_SRC emacs-lisp
  (cuss uniquify-buffer-name-style 'forward)

  (cuss indicate-buffer-boundaries
        '((top . right)
          (bottom . right)
          (t . nil)))
#+END_SRC
**** Startup buffer
#+BEGIN_SRC emacs-lisp
  (cuss inhibit-startup-buffer-menu t)
  (cuss inhibit-startup-screen t)
  (cuss initial-buffer-choice t) ; start in *scratch*
  (cuss initial-scratch-message nil)
#+END_SRC
*** Cursor
#+BEGIN_SRC emacs-lisp
  (cuss cursor-type 'bar)
  (cuss cursor-in-non-selected-windows 'hollow)
  (blink-cursor-mode 0)
#+END_SRC
*** Interactivity
**** Mouse
#+BEGIN_SRC emacs-lisp
  (cuss mouse-yank-at-point t)
#+END_SRC
**** Dialogs
#+BEGIN_SRC emacs-lisp
  (cuss use-dialog-box nil)
#+END_SRC
**** Disabled functions
#+BEGIN_SRC emacs-lisp
  (cuss disabled-command-function nil)
#+END_SRC
**** Function aliases
#+begin_src emacs-lisp
  (fset 'yes-or-no-p #'y-or-n-p)
#+end_src
*** Miscellaneous
**** Convert =^L= to a line
#+begin_src emacs-lisp
  (use-package page-break-lines
    :config
    (global-page-break-lines-mode 1))
#+end_src
** Themes: [[https://github.com/protesilaos/modus-themes][Modus]]
#+BEGIN_SRC emacs-lisp
  (use-package modus-operandi-theme)
  (use-package modus-vivendi-theme)
#+END_SRC
*** [[https://github.com/hadronzoo/theme-changer][Change themes]] based on time of day
#+BEGIN_SRC emacs-lisp
  (use-package theme-changer
    :init
    (setq calendar-location-name "Baton Rouge, LA"
          calendar-latitude 30.39
          calendar-longitude -91.83)
    :config
    (change-theme 'modus-operandi 'modus-vivendi))
#+END_SRC
*** Disable the current theme when a theme is interactively loaded
This doesn't happen often, but I'll be ready when it does.
#+begin_src emacs-lisp
  (defadvice load-theme
      (before disable-before-load (theme &optional no-confirm no-enable) activate)
    (mapc 'disable-theme custom-enabled-themes))
#+end_src
** Modeline: [[https://github.com/Malabarba/smart-mode-line][smart-mode-line]]
#+BEGIN_SRC emacs-lisp
  (use-package smart-mode-line
    :config
    (sml/setup))
#+END_SRC

I hide all minor-modes by default for a clean modeline.  However, I can add them back by adding them to the whitelist with ~(add-to-list 'rm-whitelist " REGEX")~.
#+BEGIN_SRC emacs-lisp
  (use-package rich-minority
    :custom
    (rm-whitelist '("^$")))
#+END_SRC
** Fonts
I'm sure there's a better way to do this, but for now, this is the best I've got.  I append to the ~face-font-family-alternatives~ because I don't know what kind of weird magic they're doing in there.
#+BEGIN_SRC emacs-lisp
  (cuss face-font-family-alternatives
        '(("Monospace" "courier" "fixed")
          ("Monospace Serif" "Courier 10 Pitch" "Consolas" "Courier Std" "FreeMono" "Nimbus Mono L" "courier" "fixed")
          ("courier" "CMU Typewriter Text" "fixed")
          ("Sans Serif" "helv" "helvetica" "arial" "fixed")
          ("helv" "helvetica" "arial" "fixed")
          ;; now mine
          ("FixedPitch" "DejaVu Sans Mono" "Consolas" "fixed")
          ("VariablePitch" "DejaVu Serif" "Georgia" "fixed")))

  (set-face-attribute 'default nil
                      :family "FixedPitch"
                      :height 110)

  (set-face-attribute 'fixed-pitch nil
                      :family "FixedPitch"
                      :height 110)

  (set-face-attribute 'variable-pitch nil
                      :family "VariablePitch"
                      :height 120)
#+END_SRC
*** Ligatures
These cause big problems with cc-mode (as in, totally freezing everything), so I'm going to comment it out.
#+begin_src emacs-lisp
  ;; (use-package ligature
  ;;   :straight (ligature
  ;;              :host github
  ;;              :repo "mickeynp/ligature.el")
  ;;   :config
  ;;   (ligature-set-ligatures 'prog-mode
  ;;                           '("++" "--" "/=" "&&" "||" "||="
  ;;                             "->" "=>" "::" "__"
  ;;                             "==" "===" "!=" "=/=" "!=="
  ;;                             "<=" ">=" "<=>"
  ;;                             "/*" "*/" "//" "///"
  ;;                             "\\n" "\\\\"
  ;;                             "<<" "<<<" "<<=" ">>" ">>>" ">>="
  ;;                             "|=" "^="
  ;;                             "**" "--" "---" "----" "-----"
  ;;                             "==" "===" "====" "====="
  ;;                             "</" "<!--" "</>" "-->" "/>"
  ;;                             ":=" "..." ":>" ":<" ">:" "<:"
  ;;                             "::=" ;; add others here
  ;;                             ))
  ;;   :config
  ;;   (global-ligature-mode))
#+end_src
*** [[https://github.com/rolandwalker/unicode-fonts][Unicode fonts]]
#+BEGIN_SRC emacs-lisp
  (use-package persistent-soft)

  (use-package unicode-fonts
    :after persistent-soft
    :config
    (unicode-fonts-setup))

#+END_SRC
* Editing
** Completion
I was using company, but I think it might've been causing issues with ~awk-mode~, so I'm trying ~hippie-mode~ right now.  So far, I'm also enjoying not having a popup all the time.
#+BEGIN_SRC emacs-lisp
  (bind-key "M-/" #'hippie-expand)
#+END_SRC
** Ignore case
#+BEGIN_SRC emacs-lisp
  (cuss completion-ignore-case t)
  (cuss read-buffer-completion-ignore-case t)
  (cuss read-file-name-completion-ignore-case t)
#+END_SRC
** Selection & Minibuffer
*** Selectrum & Prescient
#+begin_src emacs-lisp
    (use-package selectrum
      :config
      (selectrum-mode +1))

    (use-package prescient
      :config
      (prescient-persist-mode +1))

    (use-package selectrum-prescient
      :after (selectrum prescient)
      :config
      (selectrum-prescient-mode +1))
#+end_src
*** CtrlF for searching
#+BEGIN_SRC emacs-lisp
  (use-package ctrlf
    :custom
    (ctrlf-show-match-count-at-eol nil)
    :config
    (ctrlf-mode +1))
#+END_SRC
** Undo
#+BEGIN_SRC emacs-lisp
  (use-package undo-fu
    :bind
    ("C-/" . undo-fu-only-undo)
    ("C-?" . undo-fu-only-redo))

  (use-package undo-fu-session
    :after no-littering
    :custom
    (undo-fu-session-incompatible-files
     '("/COMMIT_EDITMSG\\'"
       "/git-rebase-todo\\'"))
    (undo-fu-session-directory
     (no-littering-expand-var-file-name "undos/"))
    :config
    (global-undo-fu-session-mode +1))
#+END_SRC
** Visual editing
*** ~zap-to-char~ replacement
#+BEGIN_SRC emacs-lisp
  (use-package zop-to-char
    :bind
    ([remap zap-to-char] . zop-to-char)
    ([remap zap-up-to-char] . zop-up-to-char))
#+END_SRC
*** Operate on a line if there's no current region
#+BEGIN_SRC emacs-lisp
  (use-package whole-line-or-region
    :config
    (whole-line-or-region-global-mode +1))
#+END_SRC
*** Expand-region
#+BEGIN_SRC emacs-lisp
  (use-package expand-region
    :bind
    ("C-=" . er/expand-region)
    ("C-+" . er/contract-region))
#+END_SRC
*** Volatile highlights
#+BEGIN_SRC emacs-lisp
  (use-package volatile-highlights
    :config
    (volatile-highlights-mode 1))
#+END_SRC
*** Visual line mode
#+BEGIN_SRC emacs-lisp
  (global-visual-line-mode 1)
#+END_SRC
*** A better ~move-beginning-of-line~
#+BEGIN_SRC emacs-lisp
  (defun my/smarter-move-beginning-of-line (arg)
    "Move point back to indentation of beginning of line.

  Move point to the first non-whitespace character on this line.
  If point is already there, move to the beginning of the line.
  Effectively toggle between the first non-whitespace character and
  the beginning of the line.

  If ARG is not nil or 1, move forward ARG - 1 lines first.  If
  point reaches the beginning or end of the buffer, stop there."
    (interactive "^p")
    (setq arg (or arg 1))

    ;; Move lines first
    (when (/= arg 1)
      (let ((line-move-visual nil))
        (forward-line (1- arg))))

    (let ((orig-point (point)))
      (back-to-indentation)
      (when (= orig-point (point))
        (move-beginning-of-line 1))))

  (bind-key "C-a" #'my/smarter-move-beginning-of-line)
#+END_SRC
** Delete the selection when typing
#+BEGIN_SRC emacs-lisp
  (delete-selection-mode 1)
#+END_SRC
** Clipboard
#+BEGIN_SRC emacs-lisp
  (cuss save-interprogram-paste-before-kill t)
#+END_SRC
** Tabs & Spaces
#+BEGIN_SRC emacs-lisp
  (cuss indent-tabs-mode nil)
  (cuss sentence-end-double-space t)
#+END_SRC
* Programming
** Git
#+BEGIN_SRC emacs-lisp
  (use-package magit
    :bind
    ("C-x g" . magit-status)
    :config
    (add-to-list 'magit-no-confirm 'stage-all-changes))

  ;; hook into `prescient'
  (define-advice magit-list-refs
      (:around (orig &optional namespaces format sortby)
               prescient-sort)
    "Apply prescient sorting when listing refs."
    (let ((res (funcall orig namespaces format sortby)))
      (if (or sortby
              magit-list-refs-sortby
              (not selectrum-should-sort-p))
          res
        (prescient-sort res))))

  (when (executable-find "cmake")
    (use-package libgit)
    (use-package magit-libgit))

  (use-package forge
    :after magit
    :custom
    (forge-owned-accounts '(("duckwork"))))
#+END_SRC
** Code formatting and display
#+BEGIN_SRC emacs-lisp
  (use-package format-all
    :hook
    (prog-mode . format-all-mode))

  (add-hook 'prog-mode-hook #'prettify-symbols-mode)

#+END_SRC
*** Parentheses
#+BEGIN_SRC emacs-lisp
  (cuss show-paren-style 'mixed)
  (show-paren-mode +1)

  (use-package smartparens
    :init
    (defun acdw/setup-smartparens ()
      (require 'smartparens-config)
      (smartparens-mode +1))
    :hook
    (prog-mode . acdw/setup-smartparens))

  (use-package rainbow-delimiters
    :hook
    (prog-mode . rainbow-delimiters-mode))
#+END_SRC
** Line numbers
#+BEGIN_SRC emacs-lisp
  (add-hook 'prog-mode-hook
            (if (and (fboundp 'display-line-numbers-mode)
                     (display-graphic-p))
                #'display-line-numbers-mode
              #'linum-mode))
#+END_SRC
** Languages
*** Lua
#+BEGIN_SRC emacs-lisp
  (use-package lua-mode
    :mode "\\.lua\\'"
    :interpreter "lua")
#+END_SRC
*** Fennel
#+BEGIN_SRC emacs-lisp
  (use-package fennel-mode
    :mode "\\.fnl\\'")
#+END_SRC
*** Web
#+BEGIN_SRC emacs-lisp
  (use-package web-mode
    :custom
    (web-mode-markup-indent-offset 2)
    (web-mode-code-indent-offset 2)
    (web-mode-css-indent-offset 2)
    :mode (("\\.ts\\'" . web-mode)
           ("\\.html?\\'" . web-mode)
           ("\\.css?\\'" . web-mode)
           ("\\.js\\'" . web-mode)))
#+END_SRC
* Writing
** Visual fill column
#+begin_src emacs-lisp
  (use-package visual-fill-column
    :custom
    (split-window-preferred-function 'visual-fill-column-split-window-sensibly)
    (visual-fill-column-center-text t)
    (fill-column 100)
    :config
    (advice-add 'text-scale-adjust
                :after #'visual-fill-column-adjust)
    :hook
    (org-mode . visual-fill-column-mode))
#+end_src
** Mixed-pitch
#+begin_src emacs-lisp
  (use-package mixed-pitch
    :hook
    (text-mode . mixed-pitch-mode))
#+end_src
** Org mode
#+begin_src emacs-lisp
  (use-package org
    :custom
    (org-startup-indented t)
    (org-src-tab-acts-natively t)
    (org-hide-emphasis-markers t)
    (org-fontify-done-headline t)
    (org-hide-leading-stars t)
    (org-pretty-entities t))

  (use-package org-superstar
    :hook
    (org-mode . org-superstar-mode))
#+end_src

* Applications
** Gemini & Gopher
#+BEGIN_SRC emacs-lisp
  (use-package elpher
    :straight (elpher
               :repo "git://thelambdalab.xyz/elpher.git")
    :bind (:map elpher-mode-map
                ("n" . elpher-next-link)
                ("p" . elpher-prev-link)
                ("o" . elpher-follow-current-link)
                ("G" . elpher-go-current))
    :hook
    (elpher-mode . visual-fill-column-mode))

  (use-package gemini-mode
    :straight (gemini-mode
               :repo "https://git.carcosa.net/jmcbray/gemini.el.git")
    :mode "\\.\\(gemini|gmi\\)\\'")

  (use-package gemini-write
    :straight (gemini-write
               :repo "https://alexschroeder.ch/cgit/gemini-write"))

  (use-package post-to-gemlog-blue
    :straight (post-to-gemlog-blue
               :repo "https://git.sr.ht/~acdw/post-to-gemlog-blue.el"))
#+END_SRC
** Pastebin
#+BEGIN_SRC emacs-lisp
  (use-package 0x0
    :custom
    (0x0-default-service 'ttm))
#+END_SRC
** Gnus
#+begin_src emacs-lisp
  (cuss gnus-select-method
        '(nnimap "imap.fastmail.com"
                 (nnimap-inbox "INBOX")
                 (nnimap-split-methods default)
                 (nnimap-expunge t)
                 (nnimap-stream ssl)))

  (cuss gnus-secondary-select-methods
        '((nntp "news.gwene.org")))
#+end_src
* Machine-specific configurations
#+begin_src emacs-lisp
  (cond
   (*acdw/at-home*
    (use-package su
      :config
      (su-mode 1))
    (use-package trashed
      :custom
      (delete-by-moving-to-trash t))
    (use-package exec-path-from-shell
      :demand
      :config
      (exec-path-from-shell-initialize)))
   )
#+end_src