path: root/config/emacs.org

#+title: Emacs Configuration
#+author: Preston Pan
#+description: my personal emacs configuration for NixOS
#+PROPERTY: header-args :tangle yes :comments link

* Introduction
This is my Vanilla Emacs configuration, made to work with my NixOS configuration. For that
reason, you will not see :ensure t inside any use-package declaration, for emacs packages
are all compiled natively and reproducibly on the NixOS side. This configuration uses the
emacs-lisp language only to configure variables for said packages, for the most part.
* Initialization
This must be the very first line in the tangled file to enable lexical binding.
#+begin_src emacs-lisp :tangle ../nix/init.el
;; -*- lexical-binding: t; -*-
#+end_src
** State
This is my imperative state. Note that a lot of the state is just in the form of various macros that I use in order to write in declarative
syntax elsewhere. Generally, however, these are all unordered and not dependent on each other loading first.
#+begin_src emacs-lisp :tangle ../nix/init.el
;; pure, well okay it prints but whatever
(defmacro try (expr)
  `(condition-case err
       ,expr
     (error
      (princ (format "BLOCK FAILED: %s\n" (error-message-string err))))))

;; pure
(defmacro declare-irc-server (name server port)
  `(defun ,name ()
     (interactive)
     (erc-tls :server ,server
              :port ,port)))

;; pure, well imperative when evaluated but they're all just bindings that don't depend on each other
(defmacro create-irc-servers (&rest server-list)
  `(progn
     ,@(mapcar (lambda (n) `(declare-irc-server ,@n)) server-list)))

;; pure
(defun org-html-latex-environment-pandoc-fix (orig-fun latex-environment contents info)
  "Force `ox-html' to use the convert command for LaTeX environments when set to 'html."
  (let ((processing-type (plist-get info :with-latex)))
    (if (eq processing-type 'html)
        (let* ((latex-frag (org-remove-indentation (org-element-property :value latex-environment)))
               (converted (org-format-latex-as-html latex-frag)))
          (format "<div class=\"equation-container\">\n<span class=\"equation\">\n%s\n</span>\n</div>" converted))
      (funcall orig-fun latex-environment contents info))))

;; imperative
(defun insert-urandom-password (&optional length)
  (interactive "P")
  (let ((length (or length 32))
        (chars "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()-_=+[]{};:,.<>?"))
    (insert
     (with-temp-buffer
       (call-process "head" nil t nil "-c" (number-to-string length) "/dev/urandom")
       (let ((bytes (buffer-string)))
         (mapconcat (lambda (c)
                      (string (elt chars (mod (string-to-char (char-to-string c)) (length chars)))))
                    bytes ""))))))

;; imperative
(defun create-htmlize-css ()
  (org-html-htmlize-generate-css)
  (with-current-buffer "*html*"
    (buffer-string)))

;; imperative
(defun minify-css (css)
  "A functional wrapper around the external 'minify' binary."
  (with-temp-buffer
    (insert css)
    (call-process-region (point-min) (point-max) "minify" t t nil "--type=css")
    (buffer-string)))

;; imperative
(defun emacs-config ()
  (unless noninteractive (server-start))

  ;; start with sane defaults
  (pixel-scroll-precision-mode 1)
  (display-battery-mode 1)
  (display-time-mode 1)
  (menu-bar-mode -1)
  (scroll-bar-mode -1)
  (tool-bar-mode -1)

  ;; load theme, fonts, and transparency. Prettify symbols.
  (set-face-attribute 'default nil :font "Iosevka Nerd Font" :height 130)
  (set-face-attribute 'variable-pitch nil :font "Lora" :height 1.1)

  (when (display-graphic-p)
    (set-fontset-font t 'han (font-spec :family "Noto Sans CJK SC"))
    (set-fontset-font t 'kana (font-spec :family "Noto Sans CJK JP"))
    (set-fontset-font t 'symbol (font-spec :family "Noto Color Emoji"))
    (set-fontset-font t 'symbol (font-spec :family "Symbols Nerd Font Mono") nil 'append)))

;; imperative
(defun evil-config ()
  (evil-mode 1)
  (evil-set-undo-system 'undo-redo)
  (evil-set-initial-state 'pdf-view-mode 'normal))

;; imperative
(defun doom-themes-config ()
  (load-theme 'doom-rouge t)
  (doom-themes-visual-bell-config)
  (doom-themes-treemacs-config)
  (doom-themes-org-config))

;; imperative
(defun org-roam-config ()
  (org-roam-db-autosync-mode)
  (org-roam-update-org-id-locations))

;; same as above
(defun org-electric-pair ()
  (setq-local electric-pair-inhibit-predicate
              (lambda (c) (if (eq c ?<) t (electric-pair-default-inhibit c)))))

;; same as above
(defun org-yasnippet-latex () (yas-activate-extra-mode 'latex-mode))

;; same as above
(defun remove-annoying-pairing () (remove-hook 'post-self-insert-hook #'yaml-electric-bar-and-angle t))

;; taken from blog https://writepermission.com/org-blogging-rss-feed.html
(defun rp/org-rss-publish-to-rss (plist filename pub-dir)
  "Publish RSS with PLIST, only when FILENAME is 'rss.org'.
PUB-DIR is when the output will be placed."
  (if (equal "rss.org" (file-name-nondirectory filename))
      (org-rss-publish-to-rss plist filename pub-dir)))

(defun format-rss-feed-entry (entry style project)
  "Format ENTRY for the RSS feed.
ENTRY is a file name.  STYLE is either 'list' or 'tree'.
PROJECT is the current project."
  (cond ((not (directory-name-p entry))
         (let* ((file (org-publish--expand-file-name entry project))
                (title (org-publish-find-title entry project))
                (date (format-time-string "%Y-%m-%d" (org-publish-find-date entry project)))
                (link (concat (file-name-sans-extension entry) ".html")))
           (with-temp-buffer
             (org-mode)

             (insert (format "* %s\n" title))
             (org-set-property "RSS_PERMALINK" link)
             (org-set-property "PUBDATE" date)
             (insert-file-contents file)
             (buffer-string))))
        ((eq style 'tree)
         ;; Return only last subdir.
         (file-name-nondirectory (directory-file-name entry)))
        (t entry)))

(defun format-rss-feed (title list)
  "Generate the rss.org file from the formatted list."
  (with-temp-buffer
    (org-mode) 
    (insert "#+TITLE: " title "\n\n")
    (insert (org-list-to-generic list '(:istart "" :icount "" :isep "\n")))
    (buffer-substring-no-properties (point-min) (point-max))))

(try (require 'url-util))

(defun org-sitemap-format-xml (title list)
  "Format the sitemap list as a standard XML file."
  (concat "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
          "<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">\n"
          (org-list-to-generic list '(:splice t :item-bullet "" :item-wrap nil))
          "\n</urlset>\n"))

(defun org-sitemap-format-entry-xml (entry style project)
  "Format ENTRY in PROJECT for XML sitemap."
  (let* ((file (file-name-sans-extension entry))
         (link (url-encode-url (concat "https://ret2pop.net/" file ".html")))
         (date (org-publish-find-date entry project))
         (lastmod (format-time-string "%Y-%m-%d" date)))
    (format "<url>\n  <loc>%s</loc>\n  <lastmod>%s</lastmod>\n</url>" link lastmod)))

(defun rp/org-sitemap-publish-function (plist filename pub-dir)
  (when (string-equal (file-name-nondirectory filename) "sitemap.xml")
    (org-publish-attachment plist filename pub-dir)))
#+end_src
** Random Packages
These are packages that I require in order to write some scripts in emacs-lisp.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package tex-site)
(use-package subr-x)
(use-package dash)
(use-package s)
(use-package f)
(use-package yaml-mode
  :demand t)
#+end_src
** Emacs
These are all the options that need to be set at the start of the program. Because use-package
is largely declarative, the order of many of these options should not matter. However, there
is some imperative programming that must be done. Hooks are also largely declarative in this
configuration as they are also defined using the use-package macros. Some of these options will
have documentation strings attached, so it is easy to follow what the individual options do.
Emacs is self documenting, after all!
#+begin_src emacs-lisp :tangle ../nix/init.el
  (use-package emacs
    :custom
    ;; global defaults
    (enable-local-variables :all "don't emit local variable warnings when publishing")
    (indent-tabs-mode nil "no real tabs, only spaces")
    (tab-width 2 "tab show as 2 spaces")
    (standard-indent 2 "base indentation")
    (custom-safe-themes t "I already manage my themes with nix")
    (custom-file null-device "Don't save custom configs")

    ;; Startup errors
    (warning-minimum-level :emergency "Supress emacs warnings")
    (confirm-kill-processes nil "Don't ask to quit")
    (debug-ignored-errors (cons 'remote-file-error debug-ignored-errors) "Remove annoying error from debug errors")
    (browse-url-generic-program "qutebrowser" "set browser to librewolf")
    (browse-url-secondary-browser-function 'browse-url-generic "set browser")
    (browse-url-browser-function 'browse-url-generic "set browser")
    (default-frame-alist '((alpha-background . 80)
                           (vertical-scroll-bars)
                           (internal-border-width . 24)
                           (left-fringe . 8)
                           (right-fringe . 8)))

    ;; Mouse wheel
    (mouse-wheel-scroll-amount '(1 ((shift) . 1)) "Nicer scrolling")
    (mouse-wheel-progressive-speed nil "Make scrolling non laggy")
    (mouse-wheel-follow-mouse 't "Scroll correct window")
    (scroll-conservatively 101 "Sort of smooth scrolling")
    (scroll-step 1 "Scroll one line at a time")
    (debug-on-error nil "Don't make the annoying popups")
    (display-time-24hr-format t "Use 24 hour format to read the time")
    (display-line-numbers-type 'relative "Relative line numbers for easy vim jumping")
    (use-short-answers t "Use y instead of yes")
    (make-backup-files nil "Don't make backups")
    (display-fill-column-indicator-column 150 "Draw a line at 100 characters")
    (fill-column 150)
    (line-spacing 2 "Default line spacing")
    (c-doc-comment-style '((c-mode . doxygen)
                           (c++-mode . doxygen)))


    :hook ((text-mode . visual-line-mode)
           (prog-mode . display-line-numbers-mode)
           (prog-mode . display-fill-column-indicator-mode)
           (org-mode . auto-fill-mode)
           (org-mode . display-fill-column-indicator-mode)
           (org-mode . display-line-numbers-mode))
    :config (emacs-config))
#+end_src
As you can see, the config (and sometimes the init section) of most of these use-package blocks
contain most of the imperative commands. In fact, most of the configurations are completely
declarative without any imperative programming at all (i.e. hooks and custom options). Note
that Emacs lambdas contain imperative state, unlike in [[file:nix.org][NixOS]] where lambdas can contain function
applications but they themselves are mainly declarative. Usually, however, the lambdas or
functions do little to nothing and are mainly wrappers for executing two commands or for giving
a variable an option. Often you will see a config section of a use-package declaration have
only one or two entries, which is intentional, as I've designed this configuration to put as
little in config as possible. I hardly consider most of this configuration to be imperative, but
of course Emacs was not designed to be fully imperative.
** Org Mode
This is my org mode configuration, which also configures latex.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package org
  :demand t
  :after (f s dash nix-mode scheme-mode)
  :hook
  ((org-mode . remove-annoying-pairing))
  :custom
  (org-export-allow-bind-keywords t "don't emit warnings")
  (org-confirm-babel-evaluate nil "I want to evaluate stuff when publishing")
  ;; Fix terrible indentation issues
  (org-edit-src-content-indentation 0)
  (org-src-tab-acts-natively t)
  (org-src-preserve-indentation t)

  (TeX-PDF-mode t)
  (org-confirm-babel-evaluate nil "Don't ask to evaluate code block")
  (org-export-with-broken-links t "publish website even with broken links")
  (org-src-fontify-natively t "Colors!")

  ;; org-latex
  (org-format-latex-header "\\documentclass{article} \
  \\usepackage[usenames]{color} \
  [DEFAULT-PACKAGES] \
  [PACKAGES] \
  \\pagestyle{empty}             % do not remove \
  % The settings below are copied from fullpage.sty \
  \\setlength{\\textwidth}{\\paperwidth} \
  \\addtolength{\\textwidth}{-3cm} \
  \\setlength{\\oddsidemargin}{1.5cm} \
  \\addtolength{\\oddsidemargin}{-2.54cm} \
  \\setlength{\\evensidemargin}{\\oddsidemargin} \
  \\setlength{\\textheight}{\\paperheight} \
  \\addtolength{\\textheight}{-\\headheight} \
  \\addtolength{\\textheight}{-\\headsep} \
  \\addtolength{\\textheight}{-\\footskip} \
  \\addtolength{\\textheight}{-3cm} \
  \\setlength{\\topmargin}{1.5cm} \
  \\addtolength{\\topmargin}{-2.54cm} \
  \\usepackage{amsmath} \
  ")
  (org-preview-latex-image-directory (expand-file-name "~/.cache/ltximg/") "don't use weird cache location")
  (org-latex-preview-ltxpng-directory (expand-file-name "~/.cache/ltximg/") "don't use weird cache location")
  (org-latex-to-html-convert-command "printf '%%s' %i | pandoc -f latex -t html --mathml | tr -d '\\n' | sed -e 's/^<p>//' -e 's/<\\/p>$//'" "latex to MathML with special character handling")
  (org-latex-to-mathml-convert-command "printf '%%s' %i | pandoc -f latex -t html --mathml | tr -d '\\n' | sed -e 's/^<p>//' -e 's/<\\/p>$//'" "latex to MathML with special character handling")

  (TeX-engine 'xetex "set xelatex as default engine")
  (preview-default-option-list '("displaymath" "textmath" "graphics") "preview latex")
  ;; (preview-image-type 'png "Use PNGs")
  (org-preview-latex-default-process 'dvipng)
  (org-format-latex-options
   '(:foreground default
                 :background default
                 :scale 2
                 :html-foreground "Black"
                 :html-background "Transparent"
                 :html-scale 1.5
                 :matchers ("begin" "$1" "$" "$$" "\\(" "\\[")) "space latex better")
  (org-return-follows-link t "be able to follow links without mouse")
  (org-startup-indented t "Indent the headings")
  (org-image-actual-width '(300) "Cap width") 
  (org-startup-with-latex-preview t "see latex previews on opening file")
  (org-startup-with-inline-images t "See images on opening file")
  (org-hide-emphasis-markers t "prettify org mode")
  (org-use-sub-superscripts "{}" "Only display superscripts and subscripts when enclosed in {}")
  (org-pretty-entities t "prettify org mode")
  (org-agenda-files (list "~/monorepo/agenda.org" "~/org/notes.org" "~/org/agenda.org") "set default org files")
  (org-default-notes-file (concat org-directory "/notes.org") "Notes file")

  ;; ricing
  (org-auto-align-tags nil)
  (org-tags-column 0)
  (org-catch-invisible-edits 'show-and-error)
  (org-special-ctrl-a/e t)
  (org-insert-heading-respect-content t)
  (org-hide-emphasis-markers t)
  (org-pretty-entities t)
  (org-agenda-tags-column 0)
  (org-ellipsis "…")
  :config
  (org-babel-do-load-languages 'org-babel-load-languages
                               '((shell . t)
                                 (python . t)
                                 (nix . t)
                                 (scheme . t)
                                 (latex . t))))

(use-package org-tempo
  :after org)

(use-package org-habit
  :after org
  :custom
  (org-habit-preceding-days 7 "See org habit entries")
  (org-habit-following-days 35 "See org habit entries")
  (org-habit-show-habits t "See org habit entries")
  (org-habit-show-habits-only-for-today nil "See org habit entries")
  (org-habit-show-all-today t "Show org habit graph"))

(use-package htmlize
  :demand t
  :after (catppuccin-theme doom-themes yaml-mode))

(unless noninteractive
  (use-package htmlize
    :after (doom-themes)))

(use-package ox-latex
  :after (org)
  :custom
  (org-latex-compiler "xelatex" "Use latex as default")
  (org-latex-pdf-process '("xelatex -interaction=nonstopmode -output-directory=%o %f") "set xelatex as default"))

(use-package ox-html
  :demand t
  :after (org htmlize)
  :custom
  (org-html-htmlize-output-type 'css "allow styling from CSS file")
  (org-html-with-latex 'html "let my html handler handle latex")
  (org-html-mathjax-options nil "disable mathjax, use MathML")
  (org-html-mathjax-template "" "disable mathjax, use MathML")
  (org-html-head-include-default-style nil "use my own css for everything")
  (org-html-head-include-scripts nil "use my own js for everything")
  (org-html-postamble (concat "Copyright © 2024 " system-fullname) "set copyright notice on bottom of site")
  (org-html-divs '((preamble "header" "preamble")
                   (content "main" "content")
                   (postamble "footer" "postamble")) "semantic html exports")
  (org-html-viewport '((width "device-width")
                       (initial-scale "1.0")
                       (minimum-scale "1.0")) "Prevent zooming out past default size")
  :config (advice-add 'org-html-latex-environment :around #'org-html-latex-environment-pandoc-fix))

(use-package ox-rss
  :after org
  :demand t)

(use-package ox-publish
  :demand t
  :after (org f s dash ox-html ox-rss)
  :custom
  (org-publish-project-alist
   `(("website-org"
      :base-directory "~/monorepo"
      :base-extension "org"
      :exclude "nix/README\\.org\\|blog/rss\\.org\\|result/.*\\|nix/.*"
      :publishing-directory "~/website_html"
      :with-author t
      :with-date t
      :with-broken-links t
      :language en

      :recursive t
      :publishing-function org-html-publish-to-html
      :headline-levels 4
      :html-footnotes-section "<div id=\"footnotes\"><hr><div id=\"text-footnotes\"><span class=\"footnotes-label-hidden\">%s</span>%s</div></div>"
      :html-head ,(concat "<meta name=\"theme-color\" content=\"#ffffff\">\n<link rel=\"preload\" href=\"/fonts/Inconsolata-Medium.woff2\" as=\"font\" type=\"font/woff2\" crossorigin>\n<meta name=\"theme-color\" content=\"#ffffff\">\n<link rel=\"preload\" href=\"/fonts/Lora-Medium.woff2\" as=\"font\" type=\"font/woff2\" crossorigin>\n<link rel=\"preload\" href=\"/fonts/CormorantGaramond-Bold.woff2\" as=\"font\" type=\"font/woff2\" crossorigin>\n<link rel=\"preload\" href=\"/fonts/CormorantGaramond-Medium.woff2\" as=\"font\" type=\"font/woff2\" crossorigin>\n<link rel=\"manifest\" href=\"/site.webmanifest\">\n<link rel=\"icon\" type=\"image/png\" sizes=\"16x16\" href=\"/favicon-16x16.png\">\n<link rel=\"mask-icon\" href=\"/safari-pinned-tab.svg\" color=\"#5bbad5\">\n<link rel=\"icon\" type=\"image/png\" sizes=\"32x32\" href=\"/favicon-32x32.png\">\n<link rel=\"apple-touch-icon\" sizes=\"180x180\" href=\"/apple-touch-icon.png\"><meta name=\"msapplication-TileColor\" content=\"#da532c\">\n"
                          "<style>"
                          (->> (create-htmlize-css)
                               (s-replace-regexp "<style[^>]*>" "")
                               (s-replace "</style>" "")
                               (s-replace "<![CDATA[/*><![CDATA[/*>\n" "")
                               (s-replace "/*]]>*/-->" "")
                               (s-trim)
                               (minify-css))
                          (f-read-text "~/monorepo/style.css" 'utf-8)
                          "</style>")
      :html-preamble t
      :html-preamble-format (("en" "<p class=\"preamble\"><a href=\"/index.html\">home</a> | <a href=\"./index.html\">section main page</a> | <a href=\"/blog/rss.xml\">rss feed</a></p><hr>"))

      ;; sitemap.html stuff
      :auto-sitemap t
      :sitemap-filename "sitemap.org"
      :sitemap-title "Site Index"
      :sitemap-style list
      :sitemap-sort-files anti-chronologically)

     ("website-blog-rss"
      :base-directory "~/monorepo/blog"
      :base-extension "org"
      :recursive nil
      :exclude "rss\\.org\\|index\\.org\\|404\\.org"
      :rss-extension "xml"

      :publishing-directory "~/website_html/blog"
      :publishing-function rp/org-rss-publish-to-rss
      :html-link-home "https://ret2pop.net/blog/"
      :html-link-use-abs-url t

      ;; use custom sitemap functionality to publish rss feed
      :auto-sitemap t
      :sitemap-filename "rss.org"
      :sitemap-title "Blog Feed"
      :sitemap-style list
      :sitemap-sort-folders ignore
      :sitemap-sort-files anti-chronologically
      :sitemap-format-entry format-rss-feed-entry
      :sitemap-function format-rss-feed)

     ("website-sitemap-xml"
      :base-directory "~/monorepo"
      :base-extension "org"
      :recursive t
      :exclude "nix/README\\.org\\|blog/rss\\.org"
      :publishing-directory "~/website_html"
      :publishing-function rp/org-sitemap-publish-function
      :auto-sitemap t
      :sitemap-filename "sitemap.xml"
      :sitemap-format-entry org-sitemap-format-entry-xml
      :sitemap-style list
      :sitemap-function org-sitemap-format-xml)

     ("website-static"
      :base-directory "~/monorepo"
      :base-extension "css\\|js\\|png\\|jpg\\|gif\\|pdf\\|mp3\\|ogg\\|swf\\|ico\\|asc\\|pub\\|webmanifest\\|xml\\|svg\\|txt\\|webp\\|conf"
      :publishing-directory "~/website_html/"
      :recursive t
      :publishing-function org-publish-attachment)

     ("website"
      :auto-sitemap t
      :components ("website-org" "website-static" "website-blog-rss" "website-sitemap-xml")))
   "functions to publish website"))
#+end_src
As you can see, I only have one real entry in config here (I don't count requires even though
they have to be on the top)
* All The Icons
I already pull in all-the-icons, but we need the emacs package to load it correctly.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package all-the-icons
  :if (display-graphic-p))
#+end_src
* Variable Pitch Font
I use this in org-mode so that I can read/write with variable pitched font. Feels like I'm reading a blog article or something.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package mixed-pitch
  :hook ((text-mode . mixed-pitch-mode)
         (org-mode . mixed-pitch-mode))
  :custom (mixed-pitch-set-height t)
  :config
  (dolist (face '(org-latex-and-related
                  org-priority
                  org-block
                  org-table
                  org-formula))
    (add-to-list 'mixed-pitch-fixed-pitch-faces face)))
#+end_src
* Writeroom
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package writeroom-mode
  :custom (writeroom-width 150))
#+end_src
* Indent Bars
I want to show indent lines in emacs so that I can line things up.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package indent-bars
  :after (nix-mode)
  :hook ((python-mode yaml-mode nix-mode) . indent-bars-mode))
#+end_src
* Autopair
Use electric-pair to automatically complete pairs of things. We need to change
what electric-pair does based on the mode.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package electric-pair
  :hook ((prog-mode . electric-pair-mode)
         (org-mode . org-electric-pair)))
#+end_src
* Search and Replace
wgrep is a program that allows you to do more intelligent search and replace.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package wgrep
  :after grep)
#+end_src
* Fragtog
This package is used to generate previews automatically when your cursor hovers over a latex
snippet.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package org-fragtog :hook (org-mode . org-fragtog-mode))
#+end_src
* Snippets
Yasnippets are useful for macros that automatically complete to an arbitrary form.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package yasnippet
  :demand t
  :hook (org-mode . org-yasnippet-latex)
  :custom (yas-snippet-dirs '("~/monorepo/yasnippet/" "~/.emacs.d/snippets"))
  :config (yas-global-mode 1))

(use-package yasnippet-snippets
  :after yasnippet)
#+end_src
* Completion
Company-mode! We need this to do autocomplete stuff.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package company
  :custom (company-backends '(company-ispell company-capf company-yasnippet company-files) "Set company backends")
  :hook ((after-init . global-company-mode)))
(use-package company-box
  :hook (company-mode . company-box-mode))
#+end_src
* Spelling
This loads a dictionary so that I can save certain words to be not misspelled and also have
this spellcheck during org mode.
#+begin_src emacs-lisp :tangle ../nix/init.el
(unless noninteractive (use-package ispell
                         :custom
                         (ispell-program-name "aspell" "use aspell")
                         (ispell-local-dictionary-alist
                          '(("en" "[[:alpha:]]" "[^[:alpha:]]" "[']" t ("-d" "en") nil utf-8)))
                         (ispell-dictionary "en" "Use english dictionary")
                         (ispell-extra-args my-ispell-args "Force aspell to use normal mode instead of nroff")
                         (ispell-silently-savep t "Save changes to dict without confirmation")
                         (ispell-alternate-dictionary my-ispell-dictionary "dict location")))

(unless noninteractive (use-package flyspell
                         :hook (text-mode . flyspell-mode)))
#+end_src
* Packages
First, some small configurations and some evil-mode initilaization because I like vim keybindings:
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package evil
  :demand t
  :custom (evil-want-keybinding nil "Don't load a whole bunch of default keybindings")
  :bind
  (:map evil-normal-state-map
        ("/" . swiper)
        ("?" . (lambda () (interactive) (swiper "--reverse"))))
  :config (evil-config))

(use-package evil-collection
  :demand t
  :after (evil)
  :bind (:map evil-motion-state-map
              ("SPC" . nil)
              ("RET" . nil)
              ("TAB" . nil))
  :config (evil-collection-init))

(use-package evil-commentary
  :after (evil)
  :config (evil-commentary-mode))

(use-package evil-org
  :after (evil org)
  :hook (org-mode . evil-org-mode))

(use-package evil-org-agenda
  :after (evil-org)
  :config (evil-org-agenda-set-keys))

(use-package which-key
  :config (which-key-mode))

(use-package page-break-lines
  :config (page-break-lines-mode))
#+end_src
** Journal
I use org-journal to journal about my life, and it's a part of my website:
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package org-journal
  :after (org)
  :custom
  (org-journal-dir "~/monorepo/journal/" "Set journal directory")
  (org-journal-date-format "%A, %d %B %Y" "Date format")
  (org-journal-file-format "%Y%m%d.org" "Automatic file creation format based on date")
  (org-journal-enable-agenda-integration t "All org-journal entries are org-agenda entries")
  (org-journal-file-header "#+TITLE: Daily Journal\n#+STARTUP: showeverything\n#+DESCRIPTION: My daily journal entry\n#+AUTHOR: Preston Pan\n#+date:\n#+options: broken-links:t" "set header files on new org journal entry"))
#+end_src
** Org Super Agenda
This gives richer org agenda views.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package org-super-agenda
  :after org
  :custom
  (org-super-agenda-groups
   '((:name "Overdue"
            :deadline past)
     (:name "Today"
            :time-grid t
            :scheduled today)
     (:name "Important"
            :priority "A")
     (:name "Due soon"
            :deadline future)
     (:name "Next"
            :todo "NEXT")
     (:name "Waiting"
            :todo "WAIT")
     (:name "Projects"
            :tag "project")))

  :config
  (org-super-agenda-mode))
#+end_src
** Org Ql
This allows efficient querying of my org mode files.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package org-ql
  :after org)
#+end_src
** Doom Modeline
The default modeline is ugly. I replace it with the doom modeline because it's better.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package doom-modeline
  :config (doom-modeline-mode 1))
#+end_src
*** Doom Theme
I used to use catppuccin, but the doom themes are so good that I am willing to break some theme consistency with my desktop in order
to use doom themes. I mean it looks better anyways if emacs is a distinct theme.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package doom-themes
  :custom
  (doom-themes-enable-bold t "use bold letters")
  (doom-themes-enable-italic t "use italic letters")
  (doom-themes-treemacs-theme "doom-colors" "set theme to something like catppuccin but doom")
  :config
  (unless noninteractive (doom-themes-config)))

(use-package catppuccin-theme
  :config (when noninteractive (try (load-theme 'catppuccin-theme t))))

(use-package solaire-mode
  :after doom-themes
  :config (solaire-global-mode +1))
#+end_src
** Grammar
I want to write good! I grammar good too.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package writegood-mode
  :hook (text-mode . writegood-mode))
#+end_src
** Make Org Look Better
Org superstar adds those nice looking utf-8 bullets:
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package org-modern
  :after (org)
  :hook (org-mode . org-modern-mode)
  :custom
  (org-modern-block-fringe t)
  (org-modern-block-name t)
  (org-modern-star '("◉" "○" "◈" "◇"))
  (org-modern-block-name '((t . t)))
  (org-modern-keyword '((t . t)))
  :config
  (global-org-modern-mode))
#+end_src
** LSP
We set up eglot, the LSP manager for emacs, now built in:
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package lsp
  :custom
  (lsp-use-plists t)
  (lsp-typescript-format-enable t)
  (lsp-typescript-indent-size 4)
  (lsp-typescript-tab-size 4)
  (lsp-typescript-indent-style "spaces")
  :hook ((prog-mode . lsp)))

(use-package editorconfig
  :config (editorconfig-mode 1))

(use-package flycheck
  :config (global-flycheck-mode))

(use-package platformio-mode
  :hook (prog-mode . platformio-conditionally-enable))
#+end_src
*** C/C++
Specific configuration for C (I also use the clangd lsp):
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package irony
  :hook ((c++-mode . irony-mode)
         (c-mode . irony-mode)
         (objc-mode . irony-mode)
         (irony-mode . irony-cdb-autosetup-compile-options)))

(use-package irony-eldoc
  :hook ((irony-mode . irony-eldoc)))
#+end_src
*** Solidity
For writing solidity:
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package solidity-mode)
(use-package company-solidity
  :after company)
(use-package solidity-flycheck
  :after flycheck
  :custom (solidity-flycheck-solc-checker-active t))
#+end_src
** Projectile
Manages projects and shit.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package projectile
  :custom
  (projectile-project-search-path '("~/org" "~/src" "~/monorepo" "~/projects") "search path for projects")
  :config (projectile-mode +1))
#+end_src
** Dashboard
We want our emacs initialization to be pretty and display useful things.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package dashboard
  :after (projectile)
  :custom
  (dashboard-banner-logo-title "Welcome, Commander!" "Set title for dashboard")
  (dashboard-icon-type 'nerd-icons "Use nerd icons")
  (dashboard-vertically-center-content t "Center content")
  (dashboard-set-init-info t)
  (dashboard-week-agenda t "Agenda in dashboard")
  (dashboard-items '((recents   . 5)
                     (bookmarks . 5)
                     (projects  . 5)
                     (agenda    . 5)
                     (registers . 5)) "Look at some items")
  :config (unless noninteractive (dashboard-setup-startup-hook)))
#+end_src
** Ivy
Ivy is a pretty cool general program for displaying stuff:
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package ivy
  :demand t
  :custom
  (ivy-use-virtual-buffers t "Make searching more efficient")
  (enable-recursive-minibuffers t "Don't get soft locked when in a minibuffer")
  :bind
  ("C-j" . ivy-immediate-done)
  ("C-c C-r" . ivy-resume)
  :init (ivy-mode)
  :config (ivy-rich-mode))

(use-package counsel
  :after ivy
  :bind
  ("M-x" . counsel-M-x)
  ("C-x C-f" . counsel-find-file)
  ("<f1> f" . counsel-describe-function)
  ("<f1> v" . counsel-describe-variable)
  ("<f1> o" . counsel-describe-symbol)
  ("<f1> l" . counsel-find-library)
  ("<f2> i" . counsel-info-lookup-symbol)
  ("<f2> u" . counsel-unicode-char)
  ("C-c g" . counsel-git)
  ("C-c j" . counsel-git-grep)
  ("C-c k" . counsel-ag)
  ("C-x l" . counsel-locate))

(use-package swiper
  :after ivy
  :bind ("C-s" . swiper))

(use-package ivy-posframe
  :custom
  (ivy-posframe-display-functions-alist '((t . ivy-posframe-display)))
  :config (ivy-posframe-mode 1))

(use-package all-the-icons-ivy-rich
  :after (ivy all-the-icons)
  :config (all-the-icons-ivy-rich-mode 1))
#+end_src
I use it for an M-x replacement and a dired replacement, among other things.
** Magit
I use magit in order to do all my git management in emacs.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package magit)
(use-package git-gutter
  :config
  (global-git-gutter-mode +1))
#+end_src
** IRC
Configure IRC to use my username.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package erc
  :hook ((erc-mode . erc-notifications-mode))
  :custom
  (erc-nick system-username "sets erc username to the one set in nix config")
  (erc-user-full-name system-fullname "sets erc fullname to the one set in nix config"))
#+end_src
** Keybindings
Global keybindings for everything that I care about globally. It's all here! I use general
to manage my global keybindings in a declarative way. These are in part inspired by the doom
emacs keybindings.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package general
  :after (evil evil-collection)
  :init (general-create-definer leader-key :prefix "SPC")
  :config
  ;; these are just bindings but the symbols are all lazily handled by general
  (create-irc-servers
   (znc "ret2pop.net" "5000")
   (prestonpan "nullring.xyz" "6697")
   (libera-chat "irc.libera.chat" "6697")
   (efnet "irc.prison.net" "6697")
   (matrix-org "matrix.org" "8448")
   (gimp-org "irc.gimp.org" "6697"))

  (leader-key 'normal
    "o c" '(org-capture :wk "Capture")
    ;; Org Mode
    "n" '(:ignore t :wk "Org mode plugins")
    "n j j" '(org-journal-new-entry :wk "Make new journal entry")
    "n r f" '(org-roam-node-find :wk "Find roam node")
    "n r i" '(org-roam-node-insert :wk "Insert roam node")
    "n r a" '(org-roam-alias-add :wk "Add alias to org roam node")
    "n r g" '(org-roam-graph :wk "Graph roam database")
    "m I" '(org-id-get-create :wk "Make org id")

    ;; Programming Projects
    "." '(counsel-find-file :wk "find file")
    "p a" '(projectile-add-known-project :wk "Add to project list")
    
    "N f" '(nix-flake :wk "nix flake menu")
    "f" '(:ignore t :wk "file operations")
    "f p" '(projectile-switch-project :wk "find project to switch to")
    "f f" '(counsel-fzf :wk "find file in project")
    "f s" '(counsel-rg :wk "find string in project")

    "y n s" '(yas-new-snippet :wk "Create new snippet")

    "g" '(:ignore t :wk "Magit")
    "g /" '(magit-dispatch :wk "git commands")
    "g P" '(magit-push :wk "git push")
    "g c" '(magit-commit :wk "git commit")
    "g p" '(magit-pull :wk "Pull from git")
    "g s" '(magit-status :wk "Change status of files")
    "g i" '(magit-init :wk "init new git project")
    "g r" '(magit-rebase :wk "Rebase branch")
    "g m" '(magit-merge :wk "Merge branches")
    "g b" '(magit-branch :wk "Git branch")

    "o p" '(treemacs :wk "Project Drawer")
    "o P" '(treemacs-projectile :wk "Import Projectile project to treemacs")

    "w r" '(writeroom-mode :wk "focus mode for writing")

    ;; Applications
    "o" '(:ignore t :wk "Open application")
    "o t" '(vterm :wk "Terminal")
    "o e" '(eshell :wk "Elisp Interpreter")
    "o m" '(mu4e :wk "Email")
    "o M" '(matrix-org :wk "Connect to matrix")
    "o r s" '(elfeed :wk "rss feed")
    "o a" '(org-agenda :wk "Open agenda")
    "o w" '(eww :wk "web browser")
    "m m" '(emms :wk "Music player")
    "s m" '(proced :wk "System Manager")
    "l p" '(list-processes :wk "List Emacs Processes")

    "m P p" '(org-publish :wk "Publish website components")
    "s e" '(sudo-edit :wk "Edit file with sudo")

    ;; "f f" '(eglot-format :wk "Format code buffer")
    "i p c" '(prestonpan :wk "Connect to my IRC server")
    "i l c" '(liberachat :wk "Connect to libera chat server")
    "i e c" '(efnet :wk "Connect to efnet chat server")
    "i g c" '(gimp-org :wk "Connect to gimp chat server")
    "i z c" '(znc :wk "Connect to my ZNC instance")

    ;; Documentation
    "h" '(:ignore t :wk "Documentation")
    "h v" '(counsel-describe-variable :wk "Describe variable")
    "h f" '(counsel-describe-function :wk "Describe function")
    "h h" '(help :wk "Help")
    "h m" '(woman :wk "Manual")
    "h i" '(info :wk "Info")

    "s i p" '(insert-urandom-password :wk "insert random password to buffer (for sops)")

    "h r r" '(lambda () (interactive) (load-file (expand-file-name "~/monorepo/nix/init.el")))))
#+end_src
** LLM
I use LLMs in order to help me come up with ideas. I use a local LLM so that I can have a
competitive LLM that doesn't cost money.
*** Minuet
Minuet does my code completion, showing the potential code completion as a ghost and automatically completing the code when my cursor is
still. It is kind of like copilot but it works with local LLMs, which is better. Though, it's obviously not always the most accurate.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package minuet
  :bind
  (("M-y" . #'minuet-complete-with-minibuffer)
   ("C-c m" . #'minuet-show-suggestion)
   :map minuet-active-mode-map
   ("C-c r" . #'minuet-dismiss-suggestion)
   ("TAB" . #'minuet-accept-suggestion))
  :hook ((prog-mode-hook . minuet-auto-suggestion-mode))
  :custom
  (minuet-request-timeout 40 "Max timeout in seconds")
  (minuet-provider 'openai-fim-compatible "FIM compatible OpenAI-like API (Ollama)")
  (minuet-n-completions 1 "I am using ghost text so I only need one possible completion")
  (minuet-context-window 1024 "how much context do I want?")
  (minuet-openai-fim-compatible-options
   '(
     :end-point "http://localhost:11434/v1/completions"
     :name "Ollama"
     :api-key "TERM"
     :template (
                :prompt minuet--default-fim-prompt-function
                :suffix minuet--default-fim-suffix-function)
     :transform ()
     :get-text-fn minuet--openai-fim-get-text-fn
     :optional (:max-tokens 50)
     :model "qwen2.5-coder:14b")))
#+end_src
** RSS Feed
I use really simple syndication (RSS) in order to read news. As a result, I use
elfeed to fetch feeds found on my website:
#+begin_src emacs-lisp :tangle ../nix/init.el
(defun my/elfeed-export-recent-tsv (outfile days)
  (interactive "FExport recent Elfeed TSV to file: \nnDays: ")
  (require 'elfeed)
  (elfeed-db-load)
  (let ((cutoff (- (float-time) (* days 86400))))
    (with-temp-file outfile
      (insert "date\tfeed-title\tfeed-url\ttitle\turl\ttags\n")
      (maphash
       (lambda (_id entry)
         (when (>= (elfeed-entry-date entry) cutoff)
           (let* ((feed (elfeed-entry-feed entry))
                  (date (seconds-to-time (elfeed-entry-date entry)))
                  (date-str (format-time-string "%Y-%m-%d %H:%M:%S" date))
                  (feed-title (or (and feed (elfeed-feed-title feed)) ""))
                  (feed-url (or (and feed (elfeed-feed-url feed)) ""))
                  (title (or (elfeed-entry-title entry) ""))
                  (url (or (elfeed-entry-link entry) ""))
                  (tags (mapconcat #'symbol-name (elfeed-entry-tags entry) ",")))
             (insert
              (mapconcat
               #'identity
               (list date-str feed-title feed-url title url tags)
               "\t")
              "\n"))))
       elfeed-db-entries))))

(defvar elfeed-ai-agent-hype-regex
  '("\\b\\(?:autonomous\\|multi[-[:space:]]?\\|ai[[:space:]]+\\)agents?\\b"
    "\\bagentic[[:space:]]+\\(?:workflow\\|framework\\|ai\\|architecture\\)\\b"
    "\\bagent[[:space:]]+\\(?:swarm\\|orchestration\\|loop\\)\\b"
    "\\bfor[[:space:]]+agents?\\b"
    "\\b\\(?:optimizing\\|optimising\\|building\\|designed?\\|designing\\)\\b.*\\bfor[[:space:]]+agents?\\b"))

(defvar elfeed-ai-product-brand-regex
  '("\\bchatgpt\\b"
    "\\bclaude\\(?:[[:space:]]?\\(?:3\\|3\\.5\\|3\\.7\\)\\)?\\b"
    "\\bgrok\\b"
    "\\bgemini\\(?:[[:space:]]?\\(?:pro\\|flash\\|ultra\\)\\)?\\b"
    "\\bdall[-[:space:]]?e\\(?:[[:space:]]?[1-9]\\)?\\b"
    "\\b\\(?:midjourney\\|sora\\|perplexity\\)\\b"
    "\\b\\(?:llama[-[:space:]]?[1-9]?\\|mistral\\|qwen\\|deepseek\\)\\b"
    "\\b\\(?:cursor\\|windsurf\\|notebooklm\\|aider\\|cline\\|roo[-[:space:]]?code\\)\\b"
    "\\b\\(?:v0\\|bolt\\.new\\|lovable\\)\\b"
    "\\b\\w*claw\\w*\\b"))

(defvar elfeed-ai-model-vendor-regex
  '("\\bopenai\\b"
    "\\banthropic\\b"
    "\\bxai\\b"
    "\\b\\(?:google[[:space:]]+\\)?deepmind\\b"
    "\\bhugging[-[:space:]]?face\\b"
    "\\b\\(?:cohere\\|meta[[:space:]]+ai\\|mistral[[:space:]]+ai\\)\\b"))

(defvar elfeed-ai-model-family-regex
  '("\\bgpt\\(?:-?[2345]\\|-?4\\.1\\|-?4\\.5\\|[-[:space:]]?o\\(?:1\\|3\\|4\\)\\)\\b"
    "\\bgenai\\b"
    "\\b[lvs]lms?\\b"
    "\\bagi\\b"
    "\\bgenerative[[:space:]]+ai\\b"
    "\\b\\(?:foundation\\|diffusion\\|large[[:space:]]+language\\)[[:space:]]+models?\\b"
    "\\b\\(?:rag\\|lora\\|fine[-[:space:]]?tun\\(?:ing\\|ed\\)\\)\\b"
    "\\bprompt[[:space:]]+engineering\\b"))

(defvar elfeed-ai-wrapper-marketing-regex
  '("\\b\\(?:ai\\|llm\\|gpt\\|chatgpt\\|claude\\|grok\\|gemini\\)[-[:space:]]?powered\\b"
    "\\bai[-[:space:]]?\\(?:driven\\|native\\|first\\|generated\\|assisted\\)\\b"
    "\\b\\(?:build\\|built\\|building\\)\\b.*\\bwith[[:space:]]+\\(?:ai\\|llms?\\|gpt\\|chatgpt\\|claude\\|grok\\|gemini\\)\\b"
    "\\bchat[[:space:]]+with[[:space:]]+\\(?:your\\|any\\)[[:space:]]+\\(?:data\\|pdfs?\\|code\\|docs?\\|database\\)\\b"
    "\\bsupercharg\\(?:ed?\\|ing\\)[[:space:]]+\\(?:your\\|with\\)[[:space:]]+\\(?:ai\\|llms?\\)\\b"
    "\\b\\w+[-[:space:]]?\\(?:copilot\\|assistant\\|agent\\)\\b"))

(defvar elfeed-ai-rolecast-regex
  '("\\bturning[[:space:]]+\\(?:an?\\|the\\)?[[:space:]]*\\(?:llm\\|ai\\|model\\|agent\\)[[:space:]]+into[[:space:]]+\\(?:an?\\|the\\)?[[:space:]]*\\w+\\b"
    "\\b\\(?:your\\|an?\\)[[:space:]]+\\(?:ai\\|llm\\|agent\\)[[:space:]]+\\(?:teammate\\|coworker\\|coder\\|researcher\\|assistant\\|manager\\|judge\\)\\b"
    "\\b\\(?:replace\\|automate\\)[[:space:]]+your[[:space:]]+\\(?:team\\|developers?\\|engineers?\\|designers?\\)[[:space:]]+with[[:space:]]+ai\\b"
    "\\bai[[:space:]]+\\(?:software[[:space:]]+\\)?\\(?:engineer\\|developer\\)\\b"))

(defvar elfeed-show-hn-demo-regex
  '("\\b\\(?:show\\|ask\\|tell\\)\\W+hn"
    "\\b\\(?:launch\\|launching\\|launched\\)\\W+hn"
    "\\b\\(?:i\\|we\\)\\W+\\(?:built\\|made\\|created\\)\\W+\\(?:a\\|an\\|this\\)\\b"
    "\\b\\(?:introducing\\|announcing\\)\\W+"
    "\\b\\(?:my\\|our\\)\\W+weekend\\W+project\\b"))

(defvar elfeed-anti-capitalist-slop-regex
  '(;; Targets the specific "reddit-tier" anti-capitalist buzzwords, not actual economics
    "\\blate[-[:space:]]?stage[[:space:]]+capitalism\\b"
    "\\btechno[-[:space:]]?feudalism\\b"
    "\\benshittification\\b" ; Highly correlated with circlejerk tech/capitalism complaining
    "\\bcorporate[[:space:]]+greed\\b"
    "\\b(?:eat[[:space:]]+the[[:space:]]+rich|class[[:space:]]+warfare)\\b"
    "\\bruling[[:space:]]+class\\b"
    "\\bsilicon[[:space:]]+valley[[:space:]]+elites?\\b"))

(defvar elfeed-anti-immigrant-slop-regex
  '(;; Targets the sensationalist framing of immigration, not neutral border news
    "\\b(?:border|migrant)[[:space:]]+crisis\\b"
    "\\bmass[[:space:]]+(?:im)?migration\\b"
    "\\billegal[[:space:]]+(?:aliens?|immigrants?)\\b"
    "\\bgreat[[:space:]]+replacement\\b"
    "\\bopen[[:space:]]+borders?\\b"))

(defvar elfeed-ai-doomerism-regex
  '(;; Targets the moral panic/resource whining around AI, not legitimate AI benchmarks or legal updates
    "\\bplagiarism[[:space:]]+machines?\\b"
    "\\bstolen[[:space:]]+(?:art|data|content)\\b"
    "\\b(?:ai|llms?|generative)[[:space:]]+(?:theft|stealing)\\b"
    "\\bcopyright[[:space:]]+(?:theft|infringement)\\b"
    "\\b(?:boiling[[:space:]]+the[[:space:]]+oceans?|guzzling[[:space:]]+(?:water|power|electricity))\\b"
    "\\bunethic(?:al|s)[[:space:]]+(?:ai|tech)\\b"))

(defvar elfeed-anti-tech-circlejerk-regex
  '(;; Targets the general "tech is ruining society" populist outrage
    "\\btech[[:space:]]+bros?\\b"
    "\\bdead[[:space:]]+internet[[:space:]]+theory\\b"
    "\\bruin(?:ing|ed)?[[:space:]]+the[[:space:]]+internet\\b"
    "\\btech[[:space:]]+dystopia\\b"
    "\\btech[[:space:]]+(?:backlash|reckoning)\\b"))

(defvar elfeed-crypto-slop-regex
  '(;; Targets Web3 buzzwords safely without breaking system design news
    "\\bdecentrali[zs]ed[[:space:]]+(?:finance|exchange|web|autonomous|apps?|identity)\\b"
    "\\b(?:defi|dapps?|daos?)\\b"
    "\\b(?:web3|web[[:space:]]3\\.0)\\b"
    "\\bcrypto(?:currency|currencies)?\\b"
    "\\bnfts?\\b"))

(defvar elfeed-general-culture-war-regex
  '(;; Targets the evergreen vocabulary of online tribalism
    "\\b\\(?:virtue[[:space:]]+signal\\(?:ing\\)?\\|mind[[:space:]]+virus\\|psyop\\|grifter\\|gaslight\\(?:ing\\)?\\)\\b"
    "\\bculture[[:space:]]+war\\b"
    "\\b\\(?:left\\|right\\)[-[:space:]]?wing[[:space:]]+\\(?:mob\\|agenda\\|propaganda\\|bias\\|tears\\)\\b"
    "\\becho[[:space:]]+chamber\\b"
    "\\bpolitical[[:space:]]+theater\\b"))

(defvar elfeed-economic-doomerism-regex
  '(;; Targets the hyper-sensationalized financial collapse crowd
    "\\bfiat[[:space:]]+\\(?:currency\\|money\\)[[:space:]]+\\(?:collapse\\|ponzi\\)\\b"
    "\\bhyperinflation[[:space:]]+\\(?:is[[:space:]]+here\\|incoming\\)\\b"
    "\\b\\(?:great\\|massive\\)[[:space:]]+wealth[[:space:]]+transfer\\b"
    "\\bcollapse[[:space:]]+of[[:space:]]+\\(?:western\\|civilization\\|society\\)\\b"))

(defvar elfeed-hn-filter-list
  `(,elfeed-ai-agent-hype-regex
    ,elfeed-ai-product-brand-regex
    ,elfeed-ai-model-vendor-regex
    ,elfeed-ai-model-family-regex
    ,elfeed-ai-wrapper-marketing-regex
    ,elfeed-ai-rolecast-regex
    ,elfeed-anti-tech-circlejerk-regex
    ,elfeed-ai-doomerism-regex
    ,elfeed-anti-immigrant-slop-regex
    ,elfeed-anti-capitalist-slop-regex
    ,elfeed-crypto-slop-regex
    ,elfeed-general-culture-war-regex
    ,elfeed-economic-doomerism-regex
    ,elfeed-show-hn-demo-regex))

(defun elfeed-list-to-filter (filter-list)
  (mapconcat #'identity filter-list "\\|"))

(defun elfeed-final-filter (filter-lists)
  ;; Use standard non-capturing group \(?: ... \)
  (concat
   "\\(?:"
   (mapconcat #'elfeed-list-to-filter filter-lists "\\|")
   "\\)"))

(use-package elfeed
  :hook ((elfeed-search-mode . elfeed-update))
  :custom
  (elfeed-search-filter (format "@1-month-ago +unread !%s" (elfeed-final-filter elfeed-hn-filter-list)) "Only display unread articles from a month ago")
  (elfeed-curl-max-connections 8 "less max connections for less lag")
  :config (run-with-timer 0 (* 60 10) 'elfeed-update))

(use-package elfeed-org
  :after (elfeed org)
  :demand t
  :custom (rmh-elfeed-org-files '("~/monorepo/config/elfeed.org") "Use elfeed config in repo as default")
  :config (elfeed-org))
#+end_src
*** Youtube
Then we set up elfeed-tube for Youtube video RSS feeds (so I don't ever have to use the web
interface and can control it from emacs):
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package elfeed-tube
  :after elfeed
  :demand t
  :bind (:map elfeed-show-mode-map
              ("F" . elfeed-tube-fetch)
              ([remap save-buffer] . elfeed-tube-save)
              :map elfeed-search-mode-map
              ("F" . elfeed-tube-fetch)
              ([remap save-buffer] . elfeed-tube-save))
  :config (elfeed-tube-setup))

(use-package elfeed-tube-mpv
  :bind (:map elfeed-show-mode-map
              ("C-c C-f" . elfeed-tube-mpv-follow-mode)
              ("C-c C-c" . elfeed-tube-mpv)
              ("C-c C-w" . elfeed-tube-mpv-where)
              :map elfeed-search-mode-map
              ("M" . elfeed-tube-mpv)))
#+end_src
** Project Drawer
I use treemacs as my sidebar for projects, so that I can easily navigate to any file in the
project directory.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package treemacs
  :after doom-themes)

(use-package treemacs-evil
  :after (treemacs evil))

(use-package treemacs-projectile
  :after (treemacs projectile))

(use-package treemacs-magit
  :after (treemacs magit))

(use-package treemacs-all-the-icons
  :after (treemacs all-the-icons))
#+end_src
** Eww
Used only for the purpose of viewing RSS feed items in emacs if I can, only resorting
to Chromium if I have to:
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package eww
  :bind (:map eww-mode-map
              ("y Y" . eww-copy-page-url))
  :custom
  (search-engines
   '((("google" "g") "https://google.com/search?q=%s")
     (("duckduckgo" "d" "ddg") "https://duckduckgo.com/?q=%s")
     (("rfc" "r") "https://www.rfc-editor.org/rfc/rfc%s.txt")
     (("rfc-kw" "rk") "https://www.rfc-editor.org/search/rfc_search_detail.php?title=%s"))
   "use this set of search engines")
  (search-engine-default "google" "Use google as default")
  (eww-search-prefix "https://google.com/search?q=" "Google prefix"))
#+end_src
** Nix Mode
Load Nix mode so our exported website has syntax highlighting for Nix blocks.
#+begin_src emacs-lisp :tangle ../nix/init.el
  (use-package nix-mode
    :demand t
    :mode "\\.nix\\'")
#+end_src
** Scheme
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package scheme-mode
  :mode ("\\.sls\\'" "\\.scm\\'"))

(use-package geiser
  :after scheme)

(use-package geiser-chez
  :after geiser
  :custom
  (geiser-active-implementations '(chez))
  (geiser-chez-binary "chez"))
#+end_src
** Org Roam
For all my mathematics and programming notes:
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package org-roam
  :after (org)
  :custom
  (org-roam-db-update-on-save t "Update org-roam db")
  (org-roam-graph-viewer "qutebrowser" "Use qutebrowser to view org-roam graph")
  (org-roam-directory (file-truename "~/monorepo/mindmap") "Set org-roam directory inside monorepo")
  (org-roam-capture-templates '(("d" "default" plain "%?"
                                 :target (file+head "${title}.org"
                                                    "#+title: ${title}\n#+author: Preston Pan\n#+description:\n#+options: broken-links:t")
                                 :unnarrowed t)) "org-roam files start with this snippet by default")
  :config (org-roam-config))

(unless noninteractive (use-package org-roam-ui
                         :after org-roam
                         :hook (after-init . org-roam-ui-mode)
                         :custom
                         (org-roam-ui-sync-theme t "Use emacs theme for org-roam-ui")
                         (org-roam-ui-follow t "Have cool visual while editing org-roam")
                         (org-roam-ui-update-on-save t "This option is obvious")
                         (org-roam-ui-open-on-start t "Have cool visual open in qutebrowser when emacs loads")
                         :config (org-roam-ui-sync-theme)))
#+end_src

** Pinentry
Set up pinentry so that I can use emacs as my pinentry frontend:
#+begin_src emacs-lisp :tangle ../nix/init.el
(unless noninteractive (use-package pinentry
                         :custom (epa-pinentry-mode `loopback "Set this option to match gpg-agent.conf")
                         :config (pinentry-start)))
#+end_src
** Email
Email in emacs can be done with Mu4e.
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package smtpmail
  :custom
  (user-mail-address system-email "Use our email")
  (user-full-name system-fullname "Use our full name")
  (sendmail-program "msmtp" "Use msmtp in order to send emails")
  (send-mail-function 'smtpmail-send-it "This is required for this to work")
  (message-sendmail-f-is-evil t "Use evil-mode for sendmail")
  (message-sendmail-extra-arguments '("--read-envelope-from") "idk what this does")
  (message-send-mail-function 'message-send-mail-with-sendmail "Use sendmail"))

(use-package mu4e
  :after smtpmail
  :hook
  ((mu4e-compose-mode . mml-secure-message-sign-pgpmime))
  :custom
  (mu4e-drafts-folder "/Drafts" "Set drafts folder mu db")
  (mu4e-sent-folder   "/Sent" "Set sent folder in mu db")
  (mu4e-trash-folder  "/Trash" "Set trash folder in mu db")
  (mu4e-attachment-dir  "~/Downloads" "Set downloads folder for attachments")
  (mu4e-view-show-addresses 't "Show email addresses in main view")
  (mu4e-confirm-quit nil "Don't ask to quit")
  (message-kill-buffer-on-exit t "Kill buffer when I exit mu4e")
  (mu4e-compose-dont-reply-to-self t "Don't include self in replies")
  (mu4e-change-filenames-when-moving t)
  (mu4e-get-mail-command (concat "mbsync " system-username) "Use mbsync for imap")
  (mu4e-compose-reply-ignore-address (list "no-?reply" system-email) "ignore my own address and noreply")
  (mu4e-html2text-command "w3m -T text/html" "Use w3m to convert html to text")
  (mu4e-update-interval 300 "Update duration")
  (mu4e-headers-auto-update t "Auto-updates feed")
  (mu4e-view-show-images t "Shows images")
  (mu4e-compose-signature-auto-include nil)
  (mml-secure-openpgp-sign-with-sender t)
  (mml-secure-openpgp-signers (list system-gpgkey))
  (mail-user-agent 'mu4e-user-agent)
  (message-mail-user-agent 'mu4e-user-agent)
  (mu4e-use-fancy-chars t "Random option to make mu4e look nicer"))
#+end_src
** Music
Set up emms in order to play music from my music directory:
#+begin_src emacs-lisp :tangle ../nix/init.el
(unless noninteractive (use-package emms
                         :custom
                         (emms-source-file-default-directory (expand-file-name "~/music/") "Use directory specified in Nix")
                         (emms-player-mpd-music-directory (expand-file-name "~/music/") "Use directory specified in Nix")
                         (emms-player-mpd-server-name "localhost" "Connect to localhost")
                         (emms-player-mpd-server-port "6600" "Connect to port 6600")
                         (emms-player-list '(emms-player-mpd) "Use mpd")
                         (emms-lyrics-display-on-modeline t "Display lyrics for reading")
                         (emms-info-functions '(emms-info-mpd emms-info-native emms-info-cueinfo) "functions for displaying information about tracks")
                         :hook
                         ((emms-playlist-mode . emms-lyrics-mode)
                          (emms-player-started . emms-lyrics-lrclib-get))
                         :init (emms-all)
                         :config (emms-player-mpd-connect)))
#+end_src
** Tabs
I use tabs because sometimes I like using the mouse (it's actually more efficient to have the option for both, trust me. Keyboards aren't all it).
#+begin_src emacs-lisp :tangle ../nix/init.el
(use-package centaur-tabs
  :custom
  (centaur-tabs-set-icons t "use icons for centaur-tabs")
  (centaur-tabs-set-modified-marker t "show when buffer modified")
  (centaur-tabs-icon-type 'all-the-icons "use all-the-icons for icons")
  :bind
  ("C-<prior>" . centaur-tabs-backward)
  ("C-<next>" . centaur-tabs-forward)
  :demand t
  :config (centaur-tabs-mode t))
#+end_src
* Unpinned
** Lean4
For some reason, lean4-mode is not in MELPA currently so I have to do this ugly thing:
#+begin_src emacs-lisp :tangle ../nix/init.el
(unless noninteractive (use-package lean4-mode
                         :commands lean4-mode
                         :vc (:url "https://github.com/leanprover-community/lean4-mode.git"
                                   :rev "76895d8939111654a472cfc617cfd43fbf5f1eb6")))
#+end_src
and actually pull something from the internet instead of pinning. Thankfully this reproduction issue is probably localized to lean files. Also,
we're pulling a specific commit so it is still pinned. If it fails to fetch, lean4 is broken I guess.