#+date: <2024-03-13>
#+title: Doom Emacs & Org-Mode 
#+description: 
#+slug: doom-emacs

** Screenshots

These screenshots are showing a project opened with projectile, a treemacs side
pane open with the project contents, multiple buffers tiled next to each other,
and the help pane open at the bottomm.

The themes are =doom-homage-white= and =doom-homage-black=.

#+caption: Doom Emacs Light Mode
[[https://media.githubusercontent.com/media/ccleberg/img/main/blog/20240314-doom-emacs/light.png]]

#+caption: Doom Emacs Dark Mode
[[https://media.githubusercontent.com/media/ccleberg/img/main/blog/20240314-doom-emacs/dark.png]]

** Getting Started

I have been switching back and forth between [[https://en.wikipedia.org/wiki/Markdown][markdown]] and [[https://en.wikipedia.org/wiki/Org-mode][org-mode]] recently for
my personal note taking, wiki, and even this blog. As a result, I have been
stumbling further into the world of Emacs and found myself at a point where I
now prefer to do most of my basic editing within Emacs.

I'll leave the markdown vs. org-mode debate for another post, but I love
org-mode's extensibility and interactive nature within Emacs, but it becomes
very unwieldy in any other client implementation of org-mode - especially on
iOS. On the flip side, markdown is limited in functionality and fractured into
different standards, but it's simple and popular enough that there are a
plethora of great clients to choose from that will get the job done.

For now, I want to focus on how I have been using Emacs and some of the things
that would have helped me learn it faster had I known where to start.

*** Installation

This post focuses on [[https://github.com/doomemacs/doomemacs][Doom Emacs]], which is an Emacs framework that provides an
alternative experience to the vanilla [[https://www.gnu.org/software/emacs/][GNU Emacs]].

The [[https://github.com/doomemacs/doomemacs/blob/master/docs/getting_started.org][Getting Start Guide]] has an extremely detailed walkthrough of installation
for all systems, so please refer to that guide for up-to-date instructions.

I chose to install on macOS, using the Homebrew option with the
=railwaycat/emacsmacport= version of Emacs.

Once the program is installed, you can run the program by typing =emacs= in a
terminal. If you installed a version of Emacs that supports both a GUI and TUI,
you will have to run =emacs -nw= to get the TUI instead of the default GUI.

*** Configuration

Once installed, you can configure Doom by editing the files within the
=~/.doom.d/= directory. This directory holds four files:

1. =config.el= - Personal configuration file
2. =custom.el= - Custom set variables
3. =init.el= - Doom modules and load order, must run =doom sync= after modifying
4. =packages.el= - Declare packages to install in this file, then run =doom
   sync= to install

I only needed a few customizations for my configuration, so I'll list them
below.

#+begin_src lisp
;; ~/.doom.d/config.el
(setq doom-theme 'doom-homage-black)
(setq display-line-numbers-type t)
(setq org-directory "~/Documents/Notes/")

;; lengthy org-publish directives at the bottom of the file
#+end_src

#+begin_src lisp
;; ~/.doom.d/init.el
(doom! :input
       :completion
       company           ; the ultimate code completion backend
       vertico           ; the search engine of the future

       :ui
       doom              ; what makes DOOM look the way it does
       doom-dashboard    ; a nifty splash screen for Emacs
       (emoji +unicode)  ; 🙂
       hl-todo           ; highlight TODO/FIXME/NOTE/DEPRECATED/HACK/REVIEW
       minimap           ; show a map of the code on the side
       modeline          ; snazzy, Atom-inspired modeline, plus API
       ophints           ; highlight the region an operation acts on
       (popup +defaults)   ; tame sudden yet inevitable temporary windows
       tabs              ; a tab bar for Emacs
       treemacs          ; a project drawer, like neotree but cooler
       (vc-gutter +pretty) ; vcs diff in the fringe
       vi-tilde-fringe   ; fringe tildes to mark beyond EOB
       workspaces        ; tab emulation, persistence & separate workspaces

       :editor
       (evil +everywhere); come to the dark side, we have cookies
       file-templates    ; auto-snippets for empty files
       fold              ; (nigh) universal code folding
       snippets          ; my elves. They type so I don't have to

       :emacs
       dired             ; making dired pretty [functional]
       electric          ; smarter, keyword-based electric-indent
       undo              ; persistent, smarter undo for your inevitable mistakes
       vc                ; version-control and Emacs, sitting in a tree

       :term
       term              ; basic terminal emulator for Emacs

       :checkers
       syntax              ; tasing you for every semicolon you forget

       :tools
       (eval +overlay)     ; run code, run (also, repls)
       lookup              ; navigate your code and its documentation
       magit             ; a git porcelain for Emacs

       :os
       (:if (featurep :system 'macos) macos)  ; improve compatibility with macOS

       :lang
       common-lisp       ; if you've seen one lisp, you've seen them all
       emacs-lisp        ; drown in parentheses
       markdown          ; writing docs for people to ignore
       org               ; organize your plain life in plain text
       python            ; beautiful is better than ugly
       sh                  ; she sells {ba,z,fi}sh shells on the C xor

       :app
       irc               ; how neckbeards socialize
       (rss +org)        ; emacs as an RSS reader

       (default +bindings +smartparens))
#+end_src

If you're editing these files within Doom directly, remember to run =SPC h r r=
to reload the configuration. Also remember to run =doom sync= for any changes to
the =init.el= or =packages.el= files.

** Basic Functionality

I kept a cheat sheet note open at first with all of the basic functions typed
out, copied as I went through the tutorial. After a little while, I no longer
needed it. I highly recommend writing down the most applicable shortcuts for
your preferred functionality and refer back to it until you've memorized it.

Memorizing the shortcuts will differ based on the type of Emacs framework being
used. Personally, migrating from vanilla Emacs to Doom Emacs simplified
everything by a large factor and instantly enabled me to start working on my
projects, eliminating most of the hurdles I was running into. The vanilla emacs
hotkeys became obnoxious and I actually stopped using Emacs entirely for about a
month before trying Doom.

For me, the first logical step is to interact with the local filesystem. To do
this, I needed to know how to open directories, open files, save files, discard
changes, close files, and switch between open files. Here are some example
shortcuts I've written down in order to accomplish file-based actions.

| Doom Hotkey     | Emacs Hotkey  | Description                            |
|-----------------+---------------+----------------------------------------|
| =SPC :=         | =C-x=         | Run functions                          |
| =SPC f f=       | =C-x f=       | Open file in buffer                    |
| =SPC f d=       | =C-x d=       | Open directory with =dired=            |
| =i=             | =C-x C-q=     | Edit current buffer (insert mode)      |
| =q=             | =C-x C-q=     | Quit out of insert mode                |
| =SPC f s=       | =C-x s=       | Save current buffer                    |
| =SPC b k=       | =C-x k=       | Kill current buffer                    |
| =SPC w h/j/k/l= | =C-x o=[fn:2] | Move left/down/up/right to next buffer |

In general, when in Doom, you can press =SPC= and wait a second for the help
pane to appear with all available hotkey options. For example, you can press
=SPC=, wait for the help pane, and then select a key such as =g= to enter the
git help pane and explore further command options.

** Editing

Next in my process is to dive into editing for any languages I'm currently
using. In this post, I will just cover Markdown and Org-Mode but I have also
been slowly adoping some Python and general web dev tools as well.

*** Markdown

#+caption: Markdown Preview
[[https://media.githubusercontent.com/media/ccleberg/img/main/blog/20240314-doom-emacs/markdown.png]]

Markdown is fairly simple as the syntax is limited, so just make sure the
=~/.doom.d/init.el= includes the =markdown= declaration in the =:lang= section.

This package includes the following hotkey menus. The insert and toggle menu
expands further, allowing you to insert various markdown elements and toggle
things like link hiding.

| Doom Hotkey                  | Function                 |
|------------------------------+--------------------------|
| =SPC m '=                    | markdown-edit-code-block |
| =SPC m e=                    | markdown-export          |
| =SPC m i=                    | +insert                  |
| =SPC m o=                    | markdown-open            |
| =SPC m p=                    | markdown-preview         |
| =SPC m t=                    | +toggle                  |
| =SPC : markdown-table-align= | markdown-table-align     |

*** Org-Mode

#+caption: Org-Mode Preview
[[https://media.githubusercontent.com/media/ccleberg/img/main/blog/20240314-doom-emacs/org.png]]

Similar to the markdown section above, ensure that the =~/.doom.d/init.el=
includes the =org= declaration in the =:lang= section.

There are a few hot keys, but a quick search with =SPC : org= shows that there
are 865 possible org-related functions you can run. I won't possibly be able to
list them all, so I will simply cover a few of the basic commands I use myself.

| Doom Hotkey    | Function                              |
|----------------+---------------------------------------|
| =SPC m t=      | org-todo                              |
| =SPC n t=      | org-todo-list                         |
| =SPC o A=      | org-agenda                            |
| =SPC X=        | org-capture                           |
| =SPC m p p=    | org-priority                          |
| =SPC m d s=    | org-schedule                          |
| =TAB=          | org-cycle                             |
| =SHIFT TAB=    | Collapse/open all headings in buffer  |
| =M-q=          | Format/wrap current section           |
| =M-Left/Right= | Demote/promote current heading        |
| =M-Down/Up=    | Shift current heading section down/up |

1. Org-Publish

   Org includes a [[https://orgmode.org/manual/Publishing.html][publishing management system]] by default that allows you to
   export org files to Org, iCalendar, HTML, LaTex, Markdown, ODT, and Plain
   Text. Most of these can be exported into another buffer and opened, or simply
   to an external file.

   While inside an org file, simply run =SPC m e= or =M-x org-export-dispatch=
   to open the export menu. This menu will show all options and ask you to
   select an option. If you want to export to HTML, simply press =h= and then
   =H= (As HTML buffer), =h= (As HTML file), or =o= (As HTML file and open).

2. Projects

   Some publishing options are easier with a defined project in Emacs. To create
   a project within Emacs, I use two methods:

   1. Add the project via the projectile command =SPC p a=. Does not always work
      for me.
   2. Add an empty =.projectile= file in the project root.

   Once a project has been created, you can create custom publishing actions
   within your =~/.doom.d/config.el= file. For example, here's a test project I
   created to try and convert this blog to org-mode recently.

   #+begin_src lisp
   ;; org-publish
   (require 'ox-publish)

   (defun my/org-sitemap-date-entry-format (entry style project) "Format ENTRY in
     org-publish PROJECT Sitemap format ENTRY ENTRY STYLE format that includes
     date." (let ((filename (org-publish-find-title entry project))) (if (= (length
     filename) 0) (format "*%s*" entry) (format "{{{timestamp(%s)}}}
     [[file:%s][%s]]" (format-time-string "%Y-%m-%d" (org-publish-find-date entry
     project)) entry filename))))

   (setq org-export-global-macros '(("timestamp" . "@@html:<time datetime='[$1]'
         class='timestamp'>[$1]</time>@@")))

   (setq org-publish-project-alist
         `(("blog"
            :base-directory "~/Source/cleberg.net/"
            :base-extension "org"
            :recursive t
            :publishing-directory "~/Source/cleberg.net/public/"
            :publishing-function org-html-publish-to-html
            ;; HTML5
            :html-doctype "html5"
            :html-html5-fancy t
            ;; Disable some Org's HTML defaults
            :html-head-include-scripts nil
            :html-head-include-default-style nil
            :section-numbers nil
            :with-title nil
            ;; Sitemap
            :auto-sitemap t
            :sitemap-title: "Sitemap"
            :sitemap-sort-files anti-chronologically
            ; :sitemap-function my/org-sitemap-date-entry-format
            ;; Customize HTML output
            :html-divs ((preamble "header" "preamble")
                        (content "main" "content")
                        (postamble "footer" "postamble"))
            :html-head "<meta name='theme-color' content='#111' media='(prefers-color-scheme: dark)'>
                        <meta name='theme-color' content='#fff' media='(prefers-color-scheme: light)'>
                        <link rel='stylesheet' href='/syntax-theme-dark.css' media='(prefers-color-scheme: dark)'>
                        <link rel='stylesheet' href='/syntax-theme-light.css' media='(prefers-color-scheme: light)'>
                        <link rel='stylesheet' href='/styles.css' type='text/css'>"
            :html-preamble "<nav class='site-nav' aria-label='site-nav' role='navigation'>
                   <ul>
                           <li><a href='/'>Home</a></li>
                           <li><a href='/blog/'>Blog</a></li>
                           <li><a href='/services/'>Services</a></li>
                           <li><a href='/wiki/'>Wiki</a></li>
                   </ul></nav>
                   <h1>%t</h1>
                   <time datetime='%d'>%d</time>"
            :html-postamble "
                   <p>Last build: %T</p>
                   <p>Created with %c</p>"
           )

           ("static"
            :base-directory "~/Source/cleberg.net/static/"
            :base-extension "css\\|txt\\|jpg\\|gif\\|png"
            :recursive t
            :publishing-directory  "~/Source/cleberg.net/public/"
            :publishing-function org-publish-attachment)

           ("cleberg.net" :components ("blog" "static"))))
   #+end_src

** General Thoughts

I have enjoyed Doom Emacs (far more than GNU Emacs) and will likely continue to
use it as my main editor for the time being. Org-Mode is certainly the largest
factor here, as I far prefer it over Markdown due to its inherent features and
detailed markup options. However, working with org-mode on iOS has been a pain
and I will have to see if there's an easier way to resolve those issues or if
going back to separate Markdown, Reminders, and Calendar apps is easier to work
with than an all-in-one org solution.

[fn:1] Doom's evil-window functionality is a bit different from GNU Emacs, but
       you can always switch to the "other" buffer with =C-x o= or =C-x b= to
       get a list of buffers to select.

[fn:2] Doom's evil-window functionality is a bit different from GNU Emacs, but
       you can always switch to the "other" buffer with =C-x o= or =C-x b= to
       get a list of buffers to select.