#+AUTHOR: Grant Shoshin Shangreaux
#+EMAIL: shoshin@cicadas.surf
#+DESCRIPTION: Html version of an Emacs literate org configuration
#+STARTUP: overview
#+PROPERTY: header-args:emacs-lisp :lexical t
#+OPTIONS: broken-links:mark

* A New Start

To welcome in Emacs 28 I intend to re-aquaint myself with the application
and its ecosystem. I've been perusing the packages available through the
default ELPA and non-gnu ELPA repos and trying to put together the various
things that I've grown accustomed to.

However, with a beginner's mind, I've been trying to avoid going down the
same old idiosyncratic paths. Courting a bit of discomfort in order to learn
what newcomers might experience coming to Emacs in this current version.

** Overview

This document is a journal, manual, and a program at once. I'm no expert at
writing a document like this. If you happen to be reading it, the journal
nature may be confusing. Over time, the journal will be incorporated into the
bits that are a manual, solidified knowledge gained through the experience.

The program bits will be tangled into [[file:shoshin-config.el]]. As a program, it
requires a certain structure from top to bottom. Here, the snippets may be
scattered around. I'll attempt to have a system to keep them organized, but
this is all an experiment.

The following code block is the "table of contents" that determines what
is tangled into the resulting elisp file:

#+begin_src emacs-lisp :tangle yes :noweb no-export
  ;;; shoshimacs.el --- Beginner's Mind Config  -*- lexical-binding:t -*-

  <<preamble>>

  <<defvars>>

  ;;; Package Management
  <<package-management>>

  ;;; Major Keybinding
  <<keybinding>>

  ;;; Completion
  <<completion>>

  ;;; Editing
  <<editing>>

  ;;; Programming
  <<programming>>

  ;;; Projects
  <<projects>>

  ;;; External Services
  <<external-services>>

  ;;; User Interface
  <<user-interface>>
#+end_src

** Preamble
:PROPERTIES:
:header-args:emacs-lisp+: :noweb-ref preamble :noweb-sep "\n\n" :results silent
:END:

This section covers initialization that works best before anything else is
configured. For example, it is much easier to manage the "custom variables"
if they are not automatically tacked onto your initialization file. You can
set and load a separate file to keep it clean:

#+begin_src emacs-lisp
  (let ((my-custom-file (expand-file-name
			 "shoshimacs-custom.el" user-emacs-directory)))
    (unless (file-exists-p my-custom-file)
      (make-empty-file my-custom-file))
    (setq custom-file my-custom-file)
    (load custom-file))
#+end_src

* Package Management
:PROPERTIES:
:header-args:emacs-lisp+: :noweb-ref package-management :noweb-sep "\n\n" :results silent
:END:

I've been using [[https://github.com/radian-software/straight.el#start-of-content][straight.el]]
as my package manager since 2019 when I moved away from Spacemacs as my
main configuration for day-to-day work. While I definitely recommend it
as a flexible yet minimal package manager, it is certainly more useful
to experienced Emacs users.

This configuration will stick to packages available through the built-in
~package.el~ system. As of Emacs 28, this is everything in the ELPA and
non-gnu ELPA package repositories. 

** ELPA and Non-GNU ELPA

ELPA packages have their copyright assigned to the FSF, which is a requirement
for any code to be included into Emacs itself. ELPA packages are thus the
most likely to be merged into Emacs as a new feature. Some, like EMMS, are
likely to continue as "add-on" optional features only some users may choose.

Non-gnu ELPA is relatively new, and does not require copyright assignment
to the FSF. Packages are added to both repositories through the emacs-devel
mailing list and the maintainers there. It intends to extend the packages
available to the base Emacs installation while providing a bridge to inclusion
in ELPA or Emacs proper at some time in the future.

*** Add non-gnu ELPA to Emacs < 28

Emacs 28 is the first version to include non-gnu ELPA by default. Some
distributions may not yet have it as an available package.

#+name: add-nongnu-elpa
#+begin_src emacs-lisp
  (when (< emacs-major-version 28)
    (add-to-list 'package-archives '("nongnu" . "https://elpa.nongnu.org/nongnu/")))
#+end_src

** Installing Packages

~package.el~ provides the [[help:package-install][package-install]] command which can be used interactively
or from Lisp code like this configuration. If a package is already installed,
it won't try to install it again. When you install a package this way, Emacs will
add its name to [[help:package-selected-packages][package-selected-packages]].

You can also use ~list-packages~ to browse, install and upgrade packages as
well.

I'll initialize the package functionality and refresh the contents to look for
updates, and ensure any additional archives are fetched. this may have a startup
impact, but i'm not concerned about that.

#+begin_src emacs-lisp
  (package-initialize)
  (package-refresh-contents)
#+end_src

** Packages not in the default repos

Any elisp package that is in Emacs's [[help:load-path][load-path]] can be ~require~'d and used.
~(add-to-list 'load-path (expand-file-name "some-package/" user-emacs-directory))~
is an example of putting the directory ~some-package/~ into the load path.

*** COMMENT xah-fly-keys

muscle memory has bound me to xah-fly-keys, and so i've decided to just
manually install it by cloning the repo and adding it to the

#+begin_src shell :var dir=(expand-file-name "xah-fly-keys" user-emacs-directory) :tangle no
  git clone https://github.com/xahlee/xah-fly-keys $dir
#+end_src

#+begin_src emacs-lisp
  (add-to-list 'load-path (expand-file-name "xah-fly-keys/" user-emacs-directory))
  (require 'xah-fly-keys)
  (xah-fly-keys-set-layout "qwerty")
  (xah-fly-keys t)
#+end_src

however, it is now in non-gnu elpa! so i don't need this anymore.

** Emacs 28 native compilation

[[info:elisp#Native Compilation][elisp#Native Compilation]]

This is a new feature in Emacs 28 that will compile all of the Elisp as native
machine code, rather than byte-code, which can result in major performance boosts.
Compilation will happen in the background and is logged to the
=*Async-native-compile-log*= buffer if you are curious. Mostly you shouldn't
have to worry about it, though you may see some compilation warnings at times.

#+begin_src emacs-lisp
  (when (and (functionp #'native-comp-available-p) (native-comp-available-p))
    (setq native-comp-always-compile t
	  package-native-compile t))
#+end_src

* Keybinding
:PROPERTIES:
:header-args:emacs-lisp+: :noweb-ref keybinding :noweb-sep "\n\n" :results silent
:END:

Keybindings are the key to playing Emacs like an instrument. no matter
what you choose, keep in mind that you can always bind keys to your
most commonly used commands to make things convienient.

I highly recommend creating a personal key map bound to a "leader key".
You initiate it with the leader, and then bind following key sequences
to commands you use. creating your own will make it easier to remember
and keep organized.

** xah-fly-keys

This is what I adopted to combat RSI. my muscle memory is tied into it
tightly right now. you may have other opinions about keybindings

#+begin_src emacs-lisp
  ;; these need to be set before requiring the package
  (setq xah-fly-use-control-key nil
	xah-fly-use-meta-key nil)
  (package-install 'xah-fly-keys)
  (require 'xah-fly-keys)
  (xah-fly-keys-set-layout "qwerty")
  (xah-fly-keys t)
#+end_src

i'm setting it up early in the config so that its keymaps are available
to modify / integrate with other packages.

*** adding some custom commands to xah maps
**** SPC 1 delete-other-windows

i want this often, feels as if i'm constantly wanting that other window
to go away.

#+begin_src emacs-lisp
  (define-key 'xah-fly-leader-key-map (kbd "1") #'delete-other-windows)
#+end_src

** with-map-defkey

#+begin_src emacs-lisp
  (defmacro with-map-defkey (keymap leader &rest pairs)
    "Define a new KEYMAP with prefix key LEADER, and list of bindings in it."
    (declare (indent 2))
    `(progn
       (defvar ,keymap (make-sparse-keymap))
       (define-prefix-command (quote ,keymap))
       (global-set-key (kbd ,leader) ,keymap)
       (mapc (lambda (pair)
               (define-key ,keymap
                 (kbd (if (numberp (car pair)) (number-to-string (car pair))
                        (symbol-name (car pair))))
                 (cadr pair)))
             (quote ,(seq-partition pairs 2)))))

  (defvar *my-config* "~/projects/shoshimacs/shoshin-config.org"
    "Path to my main configuration file.")

  (defun my-configuration ()
    (interactive)
    (find-file *my-config*))

  (defun my-reload-config ()
    "Tangles and reloads a literate config with `org-babel-load-file'"
    (interactive)
    (org-babel-load-file *my-config*))

  (with-map-defkey my-key-map "M-m"
    1 delete-other-windows
    a apropos
    b consult-buffer
    c my-configuration
    d embark-act
    e eshell
    f find-file
    g magit
    h info
    i consult-imenu
    j describe-function
    k describe-variable
    n tab-next
    p project-prefix-map
    s consult-ripgrep
    t consult-theme
    w which-key-mode
    <f1> my-reload-config)
#+end_src

** COMMENT bind-map

there is a package available in nongnu elpa that offers a macro that
sort of generalizes the leader key idea. it also hooks into the evil package
a bit to allow definition of bindings over different "states" that your
editor might be in, like command or insert mode in xah-fly-keys. its fairly
geared toward evil in that way, so i'm not sure how it will interact, but let us
find out. the other option would be to make a simple macro of our own to hook
into leader key maps.

#+begin_src emacs-lisp
  (package-install 'bind-map)

  (bind-map my-keymap
    :keys ("M-m"))

  (bind-map my-org-map
    :keys ("M-m m")
    :major-modes (org-mode)
    :bindings ("," #'org-insert-structure-template))

  (bind-map my-elisp-map
    :keys ("M-m m")
    :major-modes (emacs-lisp-mode
		  lisp-interaction-mode)
    :bindings ("e" #'edebug-instrument-function))

  (bind-map my-ruby-map
    :keys ("M-m m")
    :major-modes (ruby-mode)
    :bindings ("d" #'ruby-beginning-of-defun))

  (bind-map-set-keys my-keymap
    "b" #'consult-buffer
    "c" #'my-config
    "g" #'magit
    "j" #'consult-grep
    "k" #'consult-imenu
    "n" #'tab-next
    "t" #'consult-theme)
#+end_src

* Completion
:PROPERTIES:
:header-args:emacs-lisp: :noweb-ref completion :noweb-sep "\n\n" :results silent
:END:

Completion is a huge part of my experience using Emacs. I have been on
an evolving journey of from the basic type of terminal tab completion 
to spaceship level UI implemented as almost a sub-application in Emacs.

This configuration is aiming at using a new crop of completion enhancements
that tie into Emacs's native completion API. This is a more modular approach
that allows a sort of composition of extensions to completion behavior and
its appearance in the user interface.

** Two kinds of completion

I want to point out that there are two distinct but similar features
both grouped under the concept of "completion". The first is *Minibuffer*
completion. Any time you use the minibuffer to enter commands or arguments,
there is a completion system available to help you enter text there.
The second is *Buffer* completion, offering candidates for text you are
typing in any buffer. Code completion provided by a language server
is one example. In vanilla Emacs, you get [[info:emacs#Symbol Completion][Symbol Completion]]
for free, since Emacs itself is a running Lisp process with knowledge of
all the defined symbols in the system.

I've been confused by this in the past, because the features are so similar.
However, completing text in an arbitrary buffer really depends on context,
and it is much more complex than completing commands and arguments that are
appropriate to a specific situation.

** Emacs completion styles

Emacs has a quite sophisticated way of selecting candidates for completion.
You can read about them here: [[info:emacs#Completion Styles][emacs#Completion Styles]]

I've grown used to the =flex= style of completion where typing
=pr/s/sho.o= at the find file prompt expands to
=projects/shoshimacs/shoshin-config.org=. There are other alternatives
and you can even write your own. The ~completion-styles~ is a list of
all the styles you'd like to use. It starts at the front, and if no matches
are found, moves to the next style of completion. In this config, I just
added =flex= to the front of the default completion styles.

#+begin_src emacs-lisp
  (setq completion-styles '(flex basic partial-completion emacs22)
	completion-cycle-threshold 3
	tab-always-indent 'complete)
#+end_src

~completion-cycle-threshold~ defines when you want to just cycle through
alternatives on each <TAB> (or whatever key you use) rather than presenting
options. Setting it to 3 means if my options are "FOO, FOP, FOR" or less,
hitting complete will change FOO->FOP, FOP->FOR, FOR->FOO.

~tab-always-indent~ changes the behavior of the TAB key:

#+begin_quote
  If ‘complete’, TAB first tries to indent the current line, and if the line
  was already indented, then try to complete the thing at point.
#+end_quote

** [[info:consult#Top][consult]] - Consulting [[info:elisp#Minibuffer Completion][completing-read]]

consult offers enhanced completion similar to ivy and helm, but with the
built in completing read functionality of the minibuffer.

#+begin_src emacs-lisp
  (package-install 'consult)
#+end_src

main entry point would be ~consult-buffer~. however, there are many consult
commands that can enhance any completing read function.

*** "Virtual Buffers"

it introduces this concept of "Virtual Buffers", but i'm not certain what
it means. consult "supports ... narrowing to the virtual buffer types".

perhaps a Virtual Buffer is a "grouping" of actual Emacs buffers or "things"
that can be materialized in a buffer. For example, I can ~consult-buffer~
and press ~m SPC~ to narrow the "buffer list" to any bookmarks.

*** consult keybindings

#+begin_src emacs-lisp
  (global-set-key (kbd "C-x b") #'consult-buffer)
  (define-key xah-fly-leader-key-map (kbd "f") #'consult-buffer)
  (define-key xah-fly-command-map (kbd "n") #'consult-line)
#+end_src

*** consult-themes

i had a bit of a mess with it at first, because i'd implemented my own
solution to a quirk of theme loading. enabling themes is additive,
and can cause unexpected results. so i added [[info:elisp#Advising Functions][advice]]
to ~load-theme~ to automatically disable the old one before enabling
the new.

it seems like ~consult-theme~ does this as well. additionally, as
it will preview the theme as you are narrowing the selection. i did not
expect this behavior and it got all kinds of wonky. the manual has a
nice example of delaying the theme-switch-preview since it is slow.
this way you can scroll / narrow your list of themes without the colors
changing with every keypress.

#+begin_src emacs-lisp
  (with-eval-after-load 'consult
    (consult-customize consult-theme :preview-key '(:debounce 0.5 any))
    (setq consult-themes my-chosen-themes))
#+end_src

*** TODO consult-project-buffer

how do project buffers get filtered? i'm seeing buffers assigned to a project
that in my mind, shouldn't be.

looks like it interfaces with ~project-switch-to-buffer~ which has its own
logic about which project a buffer belongs to. some of the mistakes i was seeing
earlier were simply due to starting a repl in a particular directory.

it appears that "special" buffers may get assigned to a particular project as
well. for example the EWW buffer is part of a project, but it is unclear as
to why. appears likely to have to do with the behavior of the ~default-directory~
variable which is buffer-local.

i may want to figure out ways to mark "special" buffers as having a non-project
default-directory set so they don't show up, or just filter them out if it
becomes annoying. i'm accustomed to ~perspectives~ provided by a MELPA package
that hooked into ~projectile~'s project definitions. it would keep a list of
perspective-local buffers where the perspective was tied to a project.

** embark

#+begin_src emacs-lisp
  (package-install 'embark)
  (package-install 'embark-consult)
  (global-set-key (kbd "C-;") #'embark-act)
  (setq prefix-help-command #'embark-prefix-help-command)
#+end_src

** marginalia

#+begin_src emacs-lisp
  (package-install 'marginalia)
  (marginalia-mode)
#+end_src

** vertico

#+begin_src emacs-lisp
  (package-install 'vertico)
  (setq minibuffer-prompt-properties
	'(read-only t cursor-intangible t face minibuffer-prompt))
  (add-hook 'minibuffer-setup-hook #'cursor-intangible-mode)
  (setq read-extended-command-predicate
	#'command-completion-default-include-p)
  (setq enable-recursive-minibuffers t)
  (vertico-mode)
#+end_src

*** vertico-directory

i'd like to emulate the behavior in ~find-file~ that i'm used to from Ivy.
basically, when i press DEL it should act normally until i hit a directory
boundary, then it should jump up a dir with the following press.

this is implemented with the ~vertico-directory~ extension.

#+begin_src emacs-lisp
  (require 'vertico-directory)
  (define-key vertico-map (kbd "RET") #'vertico-directory-enter)
  (define-key vertico-map (kbd "DEL") #'vertico-directory-delete-char)
  (define-key vertico-map (kbd "M-DEL") #'vertico-directory-delete-word)
  (define-key vertico-map (kbd "M-j") #'vertico-quick-insert)
#+end_src

** corfu

#+begin_src emacs-lisp
  (package-install 'corfu)
  (setq corfu-auto t
	corfu-cycle t
	corfu-quit-no-match t)
  (global-corfu-mode t)
#+end_src

*** corfu-terminal enables in terminal interface

#+begin_src emacs-lisp
  (package-install 'corfu-terminal)
  (unless (display-graphic-p)
      (corfu-terminal-mode +1))
#+end_src
** which-key

which-key is an excellent package that helps provide guide posts for command
discoverability. many key commands in Emacs are in sequences. for example,
~org-babel-tangle~ is ~C-c C-v t~. as a user, the commands you use often
become muscle memory, or you map them to something more convienient. but
sometimes you know there is some command to do what you want but you don't
quite remember what the sequence is. or perhaps you're in a new major-mode
and you know there must be several handy commands under ~C-c~. ~which-key~
pops up a buffer with a listing of all the possible continuations from where
you are in a key sequence. for that reason, it can be useful at times even
for experienced users.

this config installs which-key, but does not activate it automatically.
some advice from Daniel Mendler (consult author) suggested that limiting the
amount Emacs pops things up automatically is a better user experience.
which-key is just a toggle away when needed, and there is also [[*embark][embark]]
which has a command to show prefix key continuations.

#+begin_src emacs-lisp
  (package-install 'which-key)
  (which-key-mode)
#+end_src

* Editing
:PROPERTIES:
:header-args:emacs-lisp: :noweb-ref editing :noweb-sep "\n\n" :results silent
:END:
** [[info:emacs#Matching][electric pair mode]]
I've been using smartparens -> (bookmark-jump "smartparens package") in my
main config. electric pair mode does some of what smartparens does out of
the box. what i'm missing is the generalized ~sp-hybrid-slurp~ or
whatever it was called. but using the built in is good for now. further
config might get what i want with vanilla built ins.

#+begin_src emacs-lisp
  (electric-pair-mode)
#+end_src

** markdown mode
#+begin_src emacs-lisp
  (package-install 'markdown-mode)
#+end_src

** org mode
*** jump to top level parent heading

a friend was wanting this functionality, so i dug around in the org functions
to find one i could build a command out of:

#+begin_src emacs-lisp
  (defun my-org-top-level-heading ()
    (interactive)
    (let ((moo 1))
      (while moo (setq moo (org-up-heading-safe)))))
#+end_src

~org-up-heading-safe~ is designed not to throw an error and returns the level
of the headline found (as it goes up) or nil if no higher level is found.
this just uses a dumb while loop to call it until it returns nil, which should
get us where we are looking to go 😃

*** exporting
#+begin_src
  (require 'ox-md)
#+end_src
**** htmilze

this seems to be required to fontify source blocks

#+begin_src emacs-lisp
  (package-install 'htmlize)
#+end_src

** recentf-mode

this tracks recently operated on files (by default) and enables quick selection
from them in various Emacs menus. [[*\[\[info:consult#Top\]\[consult\]\] - Consulting \[\[info:elisp#Minibuffer Completion\]\[completing-read\]\]][consult]] hooks into it as well.

#+begin_src emacs-lisp
  (recentf-mode)
#+end_src

** tabs and spaces

#+begin_src emacs-lisp
  (setq indent-tabs-mode nil)
#+end_src

* Programming
:PROPERTIES:
:header-args:emacs-lisp: :noweb-ref programming :noweb-sep "\n\n" :results silent
:END:
** Languages
*** Common Lisp
#+begin_src emacs-lisp
  (package-install 'sly)
#+end_src

*** Javascript

#+begin_src emacs-lisp
  (package-install 'json-mode)
#+end_src

*** Ruby
**** inf-ruby

inf-ruby provides an interface to the various REPLs available in the Ruby-verse
its currently provided by non-gnu ELPA:

#+begin_src emacs-lisp
  (package-install 'inf-ruby)
#+end_src

** Dev Docs
#+begin_src emacs-lisp
  (package-install 'devdocs)
#+end_src
* Projects
:PROPERTIES:
:header-args:emacs-lisp: :noweb-ref projects :noweb-sep "\n\n" :results silent
:END:

** project.el

~project.el~ is the built in project management tool. previously, I've used
~projectile~, which is great, but some of the more recent tools (like eglot)
use the built in ~project.el~ api for their features.

I've got the ~project-prefix-map~ on the key =p= in [[*with-map-defkey][my-key-map]].

** version control
*** magit

its the best! 🪄

#+begin_src emacs-lisp
  (package-install 'magit)
#+end_src
* External Services
:PROPERTIES:
:header-args:emacs-lisp: :noweb-ref external-services :noweb-sep "\n\n" :results silent
:END:

Packages that enable communication via HTTP or connect with external APIs or other
resources outside of Emacs and/or the local machine.

** plz - http library

this is an http library that intends to solve some of the "pain points" of url.el.
i ran into some of them trying to download and install the Victor Mono font used
by my configuration. the downside of ~plz~ is that it is dependent on ~curl~, rather
than being pure elisp. however, this is a non-issue for me, especially since my
use case had devolved into using ~make-process~ to call ~wget~ and then implement
a "callback" with a process sentinel. kinda neat, but maybe too much.

#+begin_src emacs-lisp
  (package-install 'plz)
#+end_src

the sourcehut package in this config also depends on ~plz~

** sourcehut
there's a new package in GNU ELPA for some basic interaction with the sr.ht http api.
i'm interested to try it out since i still pay for the account, plus the forge is
free software and could be self-hosted if it comes to it.

it also depends on ~plz~ which is another new package providing a nicer API for
HTTP requests.

#+begin_src emacs-lisp
  (package-install 'srht)
  (setq srht-username "shoshin")
#+end_src

an API token is stored in my ~.authinfo~ file.

* UI
:PROPERTIES:
:header-args:emacs-lisp: :noweb-ref user-interface :noweb-sep "\n\n" :results silent
:END:
** basic Emacs UI tweaks

#+begin_src emacs-lisp
  (when (display-graphic-p)
    (scroll-bar-mode -1)
    (fringe-mode '(8 . 0)))

  (tab-bar-mode t)
  (display-battery-mode t)
#+end_src

** darkroom - distraction free writing

the notes suggest using ~darkroom-tentative-mode~ which auto switches
depending on the window layout currently in use.

#+begin_src emacs-lisp
  (package-install 'darkroom)
#+end_src

** Fonts 
For code, I've grown fond of Victor Mono.

#+begin_src emacs-lisp
  (set-frame-font "Victor Mono")
#+end_src

*** COMMENT Attempt to install the font via Emacs, url.el and ~make-process~

in the end, this "works" but isn't very useful. the font cache needs to be updated
before Emacs runs for the font to register anyway. This will instead be implemented
as a shell script that can be run as a pre-req before initializing emacs.

however, i did learn a bit about [[info:elisp#Sentinels][Sentinels]] they are kinda neat.

#+begin_src emacs-lisp
  ;; this actually doesn't work right, because the process unzipping starts
  ;; before the file is completely written i think.
  (url-retrieve "https://rubjo.github.io/victor-mono/VictorMonoAll.zip"
		#'victor-mono-download-callback)

  (make-process :name "getting victor mono"
		:buffer "*Download Victor Mono*"
		:command '("wget" "--output-document=/home/shoshin/.fonts/VictorMonoAll.zip"
			   "https://rubjo.github.io/victor-mono/VictorMonoAll.zip")
		:sentinel #'victor-mono-download-callback)

  (defun victor-mono-download-callback (process event)
    (if (string-equal "finished\n" event)
	(let ((default-directory  "~/.fonts/VictorMono"))
	  (unless (file-directory-p default-directory)
	    (make-directory default-directory))
	  (make-process :name "unzipping victor mono"
			:buffer "*Unzip Victor Mono*"
			:command `("unzip" ,(expand-file-name "~/.fonts/VictorMonoAll.zip"))
			:sentinel #'victor-mono-sentinel))))

  (defun victor-mono-sentinel (process event)
    (print event)
    (if (string-equal "finished\n" event)
	(progn (message "works!")
	       (make-process :name "run fc-cache" :command '("fc-cache")))))
#+end_src
** Highlights
*** [[help:global-hl-line-mode][global-hl-mode]]
i enjoy having the current line highighted as a visual cue. 

#+begin_src emacs-lisp
  (global-hl-line-mode t)
#+end_src

can be toggled with <leader> l 2 

*** COMMENT lin-global-mode 
Make `hl-line-mode' more suitable for selection UIs

add other hooks to ~lin-mode-hooks~

#+begin_src emacs-lisp
  (setq my-lin-mode-hooks
	'())
#+end_src

#+begin_src emacs-lisp
  (package-install 'lin)
  (require 'lin)
  (setq lin-face 'lin-blue)
  (mapc (lambda (e) (cl-pushnew e lin-mode-hooks)) my-lin-mode-hooks)
  (lin-global-mode)
#+end_src
** Themes
*** theme packages / installation

to keep it concise, i'll define a special variable to hold the theme packages
i'd like to install anytime this config is loaded on a system where they are
not there. then i can ~mapc~ #'package-install over the list of themes.

#+begin_src emacs-lisp :noweb-ref defvars
  (defvar my-themes-to-install
    '(cyberpunk-theme dracula-theme nano-theme)
    "List of themes to install when loading shoshimacs config.")
#+end_src

#+begin_src emacs-lisp
  (load-theme (seq-random-elt my-chosen-themes))
#+end_src

*** chosen theme list and random loading on init

i generally haven't used built-in themes much, but there's a few i like,
and the ones i specifically install i'd like to keep in a list of "chosen"
ones. i can load one at random if i please, and perhaps provide it as
candidates to ~consult-themes~.

#+begin_src emacs-lisp :noweb-ref defvars
  (defvar my-chosen-themes
    '(cyberpunk dichromacy dracula leuven modus-operandi modus-vivendi
      nano-dark nano-light tango tango-dark)
    "List of themes I prefer for narrowing and random selection.")
#+end_src

#+begin_src emacs-lisp
  (mapc #'package-install my-themes-to-install)
#+end_src

** windresize

#+begin_src emacs-lisp
  (package-install 'windresize)
#+end_src