(Emacs)~config->app,core

The two largest sections of my config are separated into their own
files now.  Does increase init time, but I just can't handle how big
this thing is.  It'll be a bit nicer to look at and manage with
separate files.

1 files changed, 738 insertions, 0 deletions

diff --git a/Emacs/.config/emacs/core.org b/Emacs/.config/emacs/core.org
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+#+title: Core packages
+#+author: Aryadev Chavali
+#+description: The core components of my configuration
+#+date: 2023-09-29
+#+property: header-args:emacs-lisp :tangle core.el :comments link :results none
+#+options: toc:nil
+#+startup: noindent
+
+Packages that are absolutely necessary for the rest of the
+configuration.  These yield core functionality such as keybinding,
+modal editing, completion, auto typing to name a few.
+* General
+General provides a great solution for binding keys.  It has evil and
+use-package support so it fits nicely into configuration.  In this
+case, I define a "definer" for the "LEADER" keys.  Leader is bound to
+~SPC~ and it's functionally equivalent to the doom/spacemacs leader.
+Local leader is bound to ~SPC ,~ and it's similar to doom/spacemacs
+leader but doesn't try to fully assimilate the local-leader map,
+instead just picking stuff I think is useful.  This forces me to learn
+only as many bindings as I find necessary; no more, no less.
+
+I also define prefix leaders for differing applications.  These are
+quite self explanatory by their name and provide a nice way to
+visualise all bindings under a specific heading just by searching the
+code.
+#+begin_src emacs-lisp
+(use-package general
+  :straight t
+  :demand t
+  :config
+  ;; General which key definitions for leaders
+  (general-def
+    :states '(normal motion)
+    "SPC"   'nil
+    "\\"    '(nil :which-key "Local leader")
+    "SPC c" '(nil :which-key "Code")
+    "SPC f" '(nil :which-key "File")
+    "SPC t" '(nil :which-key "Shell")
+    "SPC m" '(nil :which-key "Toggle modes")
+    "SPC a" '(nil :which-key "Applications")
+    "SPC s" '(nil :which-key "Search")
+    "SPC b" '(nil :which-key "Buffers")
+    "SPC q" '(nil :which-key "Quit/Literate")
+    "SPC i" '(nil :which-key "Insert")
+    "SPC d" '(nil :which-key "Directories"))
+
+  (general-create-definer leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC")
+
+  (general-create-definer local-leader
+    :states '(normal motion)
+    :prefix "\\")
+
+  (general-create-definer code-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC c")
+
+  (general-create-definer file-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC f")
+
+  (general-create-definer shell-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC t")
+
+  (general-create-definer mode-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC m")
+
+  (general-create-definer app-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC a")
+
+  (general-create-definer search-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC s")
+
+  (general-create-definer buffer-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC b")
+
+  (general-create-definer quit-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC q")
+
+  (general-create-definer insert-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC i")
+
+  (general-create-definer dir-leader
+    :states '(normal motion)
+    :keymaps 'override
+    :prefix "SPC d")
+
+  (general-create-definer general-nmmap
+    :states '(normal motion))
+
+  (defalias 'nmmap #'general-nmmap)
+
+  (general-evil-setup t))
+#+end_src
+** Some binds in Emacs
+Some bindings that I couldn't fit elsewhere easily.
+#+begin_src emacs-lisp
+(use-package emacs
+  :straight nil
+  :general
+  (general-def
+    "C-x d" #'delete-frame)
+
+  (nmmap
+    "C--" #'text-scale-decrease
+    "C-=" #'text-scale-increase)
+
+  (leader
+    "SPC" '(execute-extended-command :which-key "M-x")
+    "'"   '(browse-url-emacs :which-key "Open url in Emacs")
+    ";"   'eval-expression
+    ":"   `(,(proc (interactive) (switch-to-buffer "*scratch*"))
+            :which-key "Switch to *scratch*")
+    "!"   '(async-shell-command :which-key "Async shell command")
+    "h" '(help-command :which-key "Help"))
+
+  (mode-leader
+    "t" #'+oreo/switch-theme)
+
+  (code-leader
+    "F" `(,(proc (interactive) (find-file "~/Code/"))
+          :which-key "Open ~/Code/"))
+
+  (file-leader
+    "f" #'find-file
+    "F" #'find-file-other-frame
+    "s" #'save-buffer
+    "p" `(,(proc (interactive)
+                 (find-file (concat user-emacs-directory "config.org")))
+          :which-key "Open config.org"))
+
+  (quit-leader
+    "q" #'save-buffers-kill-terminal
+    "c" #'+literate/compile-config
+    "l" #'+literate/load-config
+    "d" #'delete-frame)
+
+  (search-leader "i" #'imenu))
+#+end_src
+* Evil
+My editor journey started off with Vim rather than Emacs, so my brain
+has imprinted on its style.  Thankfully Emacs is super extensible so
+there exists a package (more of a supreme system) for porting Vim's
+modal editing style to Emacs, called Evil (Emacs Vi Layer).
+
+However there are a lot of packages in Vim that provide greater
+functionality, for example 'vim-surround'.  Emacs, by default, has
+these capabilities but there are further packages which integrate them
+into Evil.
+** Evil core
+Setup the evil package, with some opinionated keybindings:
+- Switch ~evil-upcase~ and ~evil-downcase~ because I use ~evil-upcase~
+  more
+- Switch ~evil-goto-mark~ and ~evil-goto-mark-line~ as I'd rather have
+  the global one closer to the home row
+- Use 'T' character as an action for transposing objects
+#+begin_src emacs-lisp
+(use-package evil
+  :demand t
+  :hook (after-init-hook . evil-mode)
+  :general
+  (leader
+    "w"  '(evil-window-map :which-key "Window")
+    "wd" #'delete-frame)
+
+  (nmmap
+    "TAB" #'evil-jump-item
+    "r"   #'evil-replace-state
+    "zC"  #'hs-hide-level
+    "zO" #'hs-show-all
+    "'"   #'evil-goto-mark
+    "`"   #'evil-goto-mark-line
+    "C-w" #'evil-window-map
+    "gu"  #'evil-upcase
+    "gU"  #'evil-downcase
+    "T"   nil)
+
+  (nmmap
+    :infix "T"
+    "w" #'transpose-words
+    "c" #'transpose-chars
+    "s" #'transpose-sentences
+    "p" #'transpose-paragraphs
+    "e" #'transpose-sexps
+    "l" #'transpose-lines)
+  :init
+  (setq evil-want-keybinding nil
+        evil-split-window-below t
+        evil-vsplit-window-right t
+        evil-want-abbrev-expand-on-insert-exit t
+        evil-undo-system #'undo-tree)
+  :config
+  (fset #'evil-window-vsplit #'make-frame))
+#+end_src
+** Evil surround
+Evil surround is a port for vim-surround.
+#+begin_src emacs-lisp
+(use-package evil-surround
+  :after evil
+  :config
+  (global-evil-surround-mode))
+#+end_src
+** Evil commentary
+Allows generalised commenting of objects easily.
+#+begin_src emacs-lisp
+(use-package evil-commentary
+  :after evil
+  :config
+  (evil-commentary-mode))
+#+end_src
+** Evil multi cursor
+Setup for multi cursors in Evil mode.  Don't let evil-mc setup it's own
+keymap because it uses 'gr' as its prefix, which I don't like.
+#+begin_src emacs-lisp
+(use-package evil-mc
+  :after evil
+  :init
+  (defvar evil-mc-key-map (make-sparse-keymap))
+  :general
+  (nmap
+    :infix "gz"
+    "q" #'evil-mc-undo-all-cursors
+    "d" #'evil-mc-make-and-goto-next-match
+    "j" #'evil-mc-make-cursor-move-next-line
+    "k" #'evil-mc-make-cursor-move-prev-line
+    "j" #'evil-mc-make-cursor-move-next-line
+    "m" #'evil-mc-make-all-cursors
+    "z" #'evil-mc-make-cursor-here
+    "r" #'evil-mc-resume-cursors
+    "s" #'evil-mc-pause-cursors
+    "u" #'evil-mc-undo-last-added-cursor)
+  :config
+  ;; (evil-mc-define-vars)
+  ;; (evil-mc-initialize-vars)
+  ;; (add-hook 'evil-mc-before-cursors-created #'evil-mc-pause-incompatible-modes)
+  ;; (add-hook 'evil-mc-before-cursors-created #'evil-mc-initialize-active-state)
+  ;; (add-hook 'evil-mc-after-cursors-deleted  #'evil-mc-teardown-active-state)
+  ;; (add-hook 'evil-mc-after-cursors-deleted  #'evil-mc-resume-incompatible-modes)
+  ;; (advice-add #'evil-mc-initialize-hooks :override #'ignore)
+  ;; (advice-add #'evil-mc-teardown-hooks :override #'evil-mc-initialize-vars)
+  ;; (advice-add #'evil-mc-initialize-active-state :before #'turn-on-evil-mc-mode)
+  ;; (advice-add #'evil-mc-teardown-active-state :after #'turn-off-evil-mc-mode)
+  ;; (add-hook 'evil-insert-state-entry-hook #'evil-mc-resume-cursors)
+  (global-evil-mc-mode))
+#+end_src
+
+** Evil collection
+Provides a community based set of keybindings for most modes in
+Emacs.  I don't necessarily like all my modes having these bindings
+though, as I may disagree with some.  So I use it in a mode to mode basis.
+#+begin_src emacs-lisp
+(use-package evil-collection
+  :after evil)
+#+end_src
+* Completion
+Emacs is a text based interface.  Completion is its bread and butter
+in providing good user experience.  By default Emacs provides
+'completions-list' which produces a buffer of options which can be
+searched and selected.  We can take this further though!
+
+Ido and Icomplete are packages distributed with Emacs to provide
+greater completion interfaces.  They utilise the minibuffer to create
+a more interactive experience, allowing incremental searches and
+option selection.
+
+Ivy and Helm provide more modern interfaces, though Helm is quite
+heavy.  Ivy, on the other hand, provides an interface similar to Ido
+with less clutter and better customisation options.
+** Ivy
+Ivy is a completion framework for Emacs, and my preferred one.  It has
+a great set of features with little to no pain with setting up.
+*** Ivy Core
+Setup for ivy, in preparation for counsel.  Turn on ivy-mode just
+after init.
+
+Setup vim-like bindings for the minibuffer ("M-(j|k)" for down|up the
+selection list).
+#+begin_src emacs-lisp
+(use-package ivy
+  :defer t
+  :hook (after-init-hook . ivy-mode)
+  :general
+  (general-def
+    :keymaps 'ivy-minibuffer-map
+    "C-j"    #'ivy-yank-symbol
+    "M-j"    #'ivy-next-line-or-history
+    "M-k"    #'ivy-previous-line-or-history
+    "C-SPC"  #'ivy-occur)
+  (general-def
+    :keymaps  'ivy-switch-buffer-map
+    "M-j"     #'ivy-next-line-or-history
+    "M-k"     #'ivy-previous-line-or-history)
+  (nmap
+    :keymaps '(ivy-occur-mode-map ivy-occur-grep-mode-map)
+    "RET"    #'ivy-occur-press-and-switch
+    "J"      #'ivy-occur-press
+    "gr"     #'ivy-occur-revert-buffer
+    "q"      #'quit-window
+    "D"      #'ivy-occur-delete-candidate
+    "W"      #'ivy-wgrep-change-to-wgrep-mode
+    "{"      #'compilation-previous-file
+    "}"      #'compilation-next-file)
+  :init
+  (with-eval-after-load "evil"
+    (evil-set-initial-state 'ivy-occur-mode 'normal)
+    (evil-set-initial-state 'ivy-occur-grep-mode 'normal))
+  (with-eval-after-load "amx"
+    (setq amx-backend 'ivy))
+
+  (setq ivy-height 10
+        ivy-wrap t
+        ivy-fixed-height-minibuffer t
+        ivy-use-virtual-buffers nil
+        ivy-virtual-abbreviate 'full
+        ivy-on-del-error-function #'ignore
+        ivy-use-selectable-prompt t)
+  :config
+  (require 'counsel nil t))
+#+end_src
+*** Counsel
+Setup for counsel.  Load after ivy and helpful.
+#+begin_src emacs-lisp
+(use-package counsel
+  :defer t
+  :general
+  (search-leader
+    "s" #'counsel-grep-or-swiper
+    "r" #'counsel-rg)
+  (file-leader
+    "r" #'counsel-recentf)
+  (insert-leader
+    "c" #'counsel-unicode-char)
+  (general-def
+    [remap describe-bindings]        #'counsel-descbinds
+    [remap load-theme]               #'counsel-load-theme)
+  :config
+  (setq ivy-initial-inputs-alist '((org-insert-link . "^"))
+        counsel-describe-function-function #'helpful-callable
+        counsel-describe-variable-function #'helpful-variable
+        counsel-grep-swiper-limit 1500000
+        ivy-re-builders-alist '((swiper . ivy--regex-plus)
+                                (counsel-grep-or-swiper . ivy--regex-plus)
+                                (counsel-rg . ivy--regex-plus)
+                                (t . ivy--regex-ignore-order)))
+  (counsel-mode))
+#+end_src
+*** WIP Ivy posframe
+:PROPERTIES:
+:header-args:emacs-lisp: :tangle no
+:END:
+This makes ivy minibuffer windows use child frames.
+Very nice eyecandy, but can get kinda annoying.
+#+begin_src emacs-lisp
+(use-package ivy-posframe
+  :hook (ivy-mode-hook . ivy-posframe-mode)
+  :straight t
+  :init
+  (setq ivy-posframe-parameters
+        '((left-fringe      . 0)
+          (right-fringe     . 0)
+          (background-color . "grey7")))
+
+  (setq ivy-posframe-display-functions-alist
+        '((t . ivy-posframe-display-at-window-center))))
+#+end_src
+*** WIP Counsel etags
+:PROPERTIES:
+:header-args:emacs-lisp: :tangle no
+:END:
+Counsel etags allows me to search generated tag files for tags.  I
+already have a function defined to generate the tags, so it's just
+searching them which I find to be a bit of a hassle, and where this
+package comes in.
+
+This has been replaced by [[*xref][xref]] which is inbuilt.
+#+begin_src emacs-lisp
+(use-package counsel-etags
+  :after counsel
+  :general
+  (search-leader
+    "t" #'counsel-etags-find-tag))
+#+end_src
+** WIP Ido
+:PROPERTIES:
+:header-args:emacs-lisp: :tangle no
+:END:
+Ido is a very old completion package that still works great to this
+day.  Though it is limited in its scope (and may thus be called a
+completion add-on rather than a full on framework), it is still a very
+powerful package.  With the use of ido-completing-read+, it may be used
+similarly to a fully fledged completion framework.
+
+#+begin_src emacs-lisp
+(use-package ido
+  :demand t
+  :general
+  (general-def
+    :keymaps '(ido-buffer-completion-map
+               ido-file-completion-map
+               ido-file-dir-completion-map
+               ido-common-completion-map)
+    (kbd "M-j")   #'ido-next-match
+    (kbd "M-k")   #'ido-prev-match
+    (kbd "C-x o") #'evil-window-up)
+  :init
+  (setq ido-decorations
+        (list "{" "}" " \n" " ..." "[" "]" " [No match]" " [Matched]"
+              " [Not readable]" " [Too big]" " [Confirm]")
+        completion-styles '(flex partial-completion intials emacs22))
+  (setq-default ido-enable-flex-matching t
+                ido-enable-dot-prefix t
+                ido-enable-regexp nil)
+  (with-eval-after-load "magit"
+    (setq magit-completing-read-function 'magit-ido-completing-read))
+  :config
+  (ido-mode)
+  (ido-everywhere))
+#+end_src
+*** Ido ubiquitous
+Ido completing-read+ is a package that extends the ido package to work
+with more text based functions.
+#+begin_src emacs-lisp
+(use-package ido-completing-read+
+  :after ido
+  :config
+  (ido-ubiquitous-mode +1))
+#+end_src
+** Amx
+Amx is a fork of Smex that works to enhance the
+execute-extended-command interface.  It also provides support for ido
+or ivy (though I'm likely to use ido here) and allows you to switch
+between them.
+
+It provides a lot of niceties such as presenting the key bind when
+looking for a command.
+
+#+begin_src emacs-lisp
+(use-package amx
+  :config
+  (amx-mode))
+#+end_src
+** Orderless
+Orderless sorting method for completion, probably one of the best
+things ever.
+#+begin_src emacs-lisp
+(use-package orderless
+  :after (ivy ido)
+  :config
+  (setf (alist-get t ivy-re-builders-alist) 'orderless-ivy-re-builder))
+#+end_src
+** Completions-list
+In case I ever use the completions list, some basic commands to look
+around.
+#+begin_src emacs-lisp
+(use-package simple
+  :straight nil
+  :general
+  (nmmap
+    :keymaps 'completion-list-mode-map
+    "l"   #'next-completion
+    "h"   #'previous-completion
+    "ESC" #'delete-completion-window
+    "q"   #'quit-window
+    "RET" #'choose-completion)
+  :config
+  (with-eval-after-load "evil"
+    (setq evil-emacs-state-modes (cl-remove-if
+                                  #'(lambda (x) (eq 'completions-list-mode x))
+                                  evil-emacs-state-modes))
+    (add-to-list 'evil-normal-state-modes 'completions-list-mode)))
+#+end_src
+** Company
+Company is the auto complete system I use.  I don't like having heavy
+setups for company as it only makes it slower to use.  In this case,
+just setup some evil binds for company.
+#+begin_src emacs-lisp
+(use-package company
+  :straight t
+  :hook
+  (prog-mode-hook   . company-mode)
+  (eshell-mode-hook . company-mode)
+  :general
+  (imap
+    "C-SPC" #'company-complete)
+  (general-def
+    :states '(normal insert)
+    "M-j" #'company-select-next
+    "M-k" #'company-select-previous))
+#+end_src
+* Pretty symbols
+Prettify symbols mode allows for users to declare 'symbols' that
+replace text within certain modes.  Though this may seem like useless
+eye candy, it has aided my comprehension and speed of recognition
+(recognising symbols is easier than words).
+
+Essentially a use-package keyword which makes declaring pretty symbols
+for language modes incredibly easy.  Checkout my [[C/C++][C/C++]] configuration
+for an example.
+#+begin_src emacs-lisp
+(use-package prog-mode
+  :straight nil
+  :init
+  (setq prettify-symbols-unprettify-at-point t)
+  :config
+  (with-eval-after-load "use-package-core"
+    (add-to-list 'use-package-keywords ':pretty)
+    (defun use-package-normalize/:pretty (_name-symbol _keyword args)
+      args)
+
+    (defun use-package-handler/:pretty (name _keyword args rest state)
+      (use-package-concat
+       (use-package-process-keywords name rest state)
+       (mapcar
+        #'(lambda (arg)
+            (let ((mode (car arg))
+                  (rest (cdr arg)))
+              `(add-hook
+                ',mode
+                #'(lambda nil
+                    (setq prettify-symbols-alist ',rest)
+                    (prettify-symbols-mode)))))
+        args)))))
+#+end_src
+
+Here's a collection of keywords and possible associated symbols for
+any prog language of choice.  Mostly for reference and copying.
+#+begin_example
+("null"   . "Ø")
+("list"   . "ℓ")
+("string" . "𝕊")
+("true"   . "⊤")
+("false"  . "⊥")
+("char"   . "ℂ")
+("int"    . "ℤ")
+("float"  . "ℝ")
+("!"      . "¬")
+("&&"     . "∧")
+("||"      . "∨")
+("for"    . "∀")
+("return" . "⟼")
+("print"  . "ℙ")
+("lambda" . "λ")
+#+end_example
+* Window management
+Emacs' default window management is quite bad, eating other windows on
+a whim and not particularly caring for the current window setup.
+Thankfully you can change this via the ~display-buffer-alist~ which
+matches buffer names with how the window for the buffer should be
+displayed.  I add a use-package keyword to make ~display-buffer-alist~
+records within use-package.
+
+I have no idea whether it's optimal AT ALL, but it works for me.
+#+begin_src emacs-lisp
+(use-package window
+  :straight nil
+  :general
+  (buffer-leader
+    "b" #'switch-to-buffer
+    "d" #'kill-current-buffer
+    "K" #'kill-buffer
+    "j" #'next-buffer
+    "k" #'previous-buffer
+    "D" '(+oreo/clean-buffer-list :which-key "Kill most buffers"))
+  :init
+  (with-eval-after-load "use-package-core"
+    (add-to-list 'use-package-keywords ':display)
+    (defun use-package-normalize/:display (_name-symbol _keyword args)
+      args)
+
+    (defun use-package-handler/:display (name _keyword args rest state)
+      (use-package-concat
+       (use-package-process-keywords name rest state)
+       (mapcar
+        #'(lambda (arg)
+            `(add-to-list 'display-buffer-alist
+                          ',arg))
+        args)))))
+#+end_src
+** Some display records
+Using the ~:display~ keyword, setup up some ~display-buffer-alist~
+records.  This is mostly for packages that aren't really configured
+(like [[info:woman][woman]]) or packages that were configured before
+(like [[Ivy][Ivy]]).
+#+begin_src emacs-lisp
+(use-package window
+  :straight nil
+  :defer t
+  :display
+  ("\\*Process List\\*"
+   (display-buffer-at-bottom)
+   (window-height . 0.25))
+
+  ("\\*\\(Ido \\)?Completions\\*"
+   (display-buffer-in-side-window)
+   (window-height . 0.25)
+   (side . bottom))
+
+  ("\\*ivy-occur.*"
+   (display-buffer-at-bottom)
+   (window-height . 0.25))
+
+  ("\\*Async Shell Command\\*"
+   (display-buffer-at-bottom)
+   (window-height . 0.25)))
+#+end_src
+* Auto typing
+Snippets are a pretty nice way of automatically inserting code.  Emacs
+provides a ton of packages by default to do this, but there are great
+packages to install as well.
+
+Abbrevs and skeletons make up a popular solution within Emacs default.
+Abbrevs are for simple expressions wherein the only input is the key,
+and the output is some Elisp function.  They provide a lot of inbuilt
+functionality and are quite useful.  Skeletons, on the other hand, are
+for higher level insertions
+
+The popular external solution is Yasnippet.  Yasnippet is a great
+package for snippets, which I use heavily in programming and org-mode.
+I setup here the global mode for yasnippet and a collection of
+snippets for ease of use.
+** Abbrevs
+Just define a few abbrevs for various date-time operations.  Also
+define a macro that will assume a function for the expansion, helping
+with abstracting a few things away.
+#+begin_src emacs-lisp
+(use-package abbrev
+  :straight nil
+  :hook
+  (prog-mode-hook . abbrev-mode)
+  (text-mode-hook . abbrev-mode)
+  :init
+  (defmacro +abbrev/define-abbrevs (abbrev-table &rest abbrevs)
+    `(progn
+       ,@(mapcar #'(lambda (abbrev)
+                     `(define-abbrev
+                        ,abbrev-table
+                        ,(car abbrev)
+                        ""
+                        (proc (insert ,(cadr abbrev)))))
+                 abbrevs)))
+  (setq save-abbrevs nil)
+  :config
+  (+abbrev/define-abbrevs
+   global-abbrev-table
+   ("sdate"
+    (format-time-string "%Y-%m-%d" (current-time)))
+   ("stime"
+    (format-time-string "%H:%M:%S" (current-time)))
+   ("sday"
+    (format-time-string "%A" (current-time)))
+   ("smon"
+    (format-time-string "%B" (current-time)))))
+#+end_src
+** WIP Skeletons
+:PROPERTIES:
+:header-args:emacs-lisp: :tangle no
+:END:
+Defines a macro for generating a skeleton + abbrev for a given mode.
+Doesn't sanitise inputs because I assume callers are /rational/ actors
+who would *only* use this for their top level Emacs config.
+
+Honestly didn't find much use for this currently, so disabled.
+#+begin_src emacs-lisp
+(use-package skeleton
+  :straight nil
+  :after abbrev
+  :config
+  (defmacro +autotyping/gen-skeleton-abbrev (mode abbrev &rest skeleton)
+    (let* ((table          (intern (concat (symbol-name mode) "-abbrev-table")))
+           (skeleton-name  (intern (concat "+skeleton/" (symbol-name mode) "/" abbrev))))
+      `(progn
+         (define-skeleton
+           ,skeleton-name
+           ""
+           ,@skeleton)
+         (define-abbrev ,table
+           ,abbrev
+           ""
+           ',skeleton-name)))))
+#+end_src
+** Auto insert
+Allows inserting text immediately upon creating a new buffer with a
+given name.  Supports skeletons for inserting text.  To make it easier
+for later systems to define their own auto inserts, I define a
+~use-package~ keyword ~auto-insert~ which allows one to define an
+entry for ~auto-insert-alist~.
+#+begin_src emacs-lisp
+(use-package autoinsert
+  :straight nil
+  :demand t
+  :hook (after-init-hook . auto-insert-mode)
+  :config
+  (with-eval-after-load "use-package-core"
+    (add-to-list 'use-package-keywords ':auto-insert)
+    (defun use-package-normalize/:auto-insert (_name-symbol _keyword args)
+      args)
+    (defun use-package-handler/:auto-insert (name _keyword args rest state)
+      (use-package-concat
+       (use-package-process-keywords name rest state)
+       (mapcar
+        #'(lambda (arg)
+            `(add-to-list
+              'auto-insert-alist
+              ',arg))
+        args)))))
+#+end_src
+** Yasnippet default
+Look at the snippets [[file:../.config/yasnippet/snippets/][folder]]
+for all snippets I've got.
+#+begin_src emacs-lisp
+(use-package yasnippet
+  :defer t
+  :hook
+  (prog-mode-hook . yas-minor-mode)
+  :general
+  (insert-leader
+    "i" #'yas-insert-snippet)
+  :config
+  (yas-load-directory (no-littering-expand-etc-file-name "yasnippet/snippets")))
+#+end_src