Personal information (name, email) are stored in a separate personal.el file.
Machine specific settings are stored in a separate custom.el file.
Both files are loaded automatically.
When Exporting HTML from org-mode the style from the org-theme.css file is inlined automatically.

Set Up use-package

Packages provided by straight.el https://github.com/radian-software/straight.el

  (defvar bootstrap-version)
  (let ((bootstrap-file
         (expand-file-name "straight/repos/straight.el/bootstrap.el" user-emacs-directory))
        (bootstrap-version 6))
    (unless (file-exists-p bootstrap-file)
      (with-current-buffer
          (url-retrieve-synchronously
           "https://raw.githubusercontent.com/radian-software/straight.el/develop/install.el"
           'silent 'inhibit-cookies)
        (goto-char (point-max))
        (eval-print-last-sexp)))
    (load bootstrap-file nil 'nomessage))

  (straight-use-package 'use-package)
  (setq straight-use-package-by-default t)

  (package-initialize)

  (straight-use-package 'bind-key)

Theming

Add the nano package from Github

  (straight-use-package
   '(nano-emacs :type git :host github :repo "rougier/nano-emacs"))

  (setq nano-font-size 12)

Configure all nano modules

  ;; Default layout (optional)
  (require 'nano-layout)

  ;; Theming Command line options (this will cancel warning messages)
  (add-to-list 'command-switch-alist '("-dark"   . (lambda (args))))
  (add-to-list 'command-switch-alist '("-light"  . (lambda (args))))
  (add-to-list 'command-switch-alist '("-default"  . (lambda (args))))
  (add-to-list 'command-switch-alist '("-no-splash" . (lambda (args))))
  (add-to-list 'command-switch-alist '("-no-help" . (lambda (args))))
  (add-to-list 'command-switch-alist '("-compact" . (lambda (args))))


  (cond
   ((member "-default" command-line-args) t)
   ((member "-dark" command-line-args) (require 'nano-theme-dark))
   (t (require 'nano-theme-light)))

  ;; Customize support for 'emacs -q' (Optional)
  ;; You can enable customizations by creating the nano-custom.el file
  ;; with e.g. `touch nano-custom.el` in the folder containing this file.
  (let* ((this-file  (or load-file-name (buffer-file-name)))
         (this-dir  (file-name-directory this-file))
         (custom-path  (concat this-dir "nano-custom.el")))
    (when (and (eq nil user-init-file)
               (eq nil custom-file)
               (file-exists-p custom-path))
      (setq user-init-file this-file)
      (setq custom-file custom-path)
      (load custom-file)))

  ;; Theme
  (require 'nano-faces)
  (nano-faces)

  (require 'nano-theme)
  (nano-theme)

  ;; Nano session saving (optional)
  (require 'nano-session)

  ;; Nano header & mode lines (optional)
  (require 'nano-modeline)

  ;; Nano key bindings modification (optional)
  (require 'nano-bindings)

  ;; Compact layout (need to be loaded after nano-modeline)
  (when (member "-compact" command-line-args)
    (require 'nano-compact))

  ;; Nano counsel configuration (optional)
  ;; Needs "counsel" package to be installed (M-x: package-install)
  ;; (require 'nano-counsel)

  ;; Welcome message (optional)
  (let ((inhibit-message t))
    (message "Welcome to GNU Emacs / N Λ N O edition")
    (message (format "Initialization time: %s" (emacs-init-time))))

  ;; Splash (optional)
  (unless (member "-no-splash" command-line-args)
    (require 'nano-splash))

  ;; Help (optional)
  (unless (member "-no-help" command-line-args)
    (require 'nano-help))

Set up the default frame look

  (setq default-frame-alist
        (append (list '(width  . 90) '(height . 50)
                      '(vertical-scroll-bars . nil)
                      '(internal-border-width . 5))))

Fix Defaults

Hide UI elements

Remove all those UI elements. They do not look good and waste space.

  (tool-bar-mode -1)
  (menu-bar-mode t)
  (scroll-bar-mode -1)
  (tooltip-mode -1)
  (fringe-mode -1)

Disable file backups

Emacs sure loves to clutter directories with backup files.

  (setq make-backup-files nil)
  (setq auto-save-default nil)
  (setq create-lockfiles nil)

Other Settings

  ;; The default encoding should be utf-8 everywhere
  (prefer-coding-system 'utf-8)

  ;; All "Yes or No" questions can be shortend to "y or n".
  (defalias 'yes-or-no-p 'y-or-n-p)

  ;; No more startup messages and screens
  (setq inhibit-startup-screen t)
  (setq initial-scratch-message nil)
  (defun display-startup-echo-area-message ()
    (message "Welcome Back!"))

  ;; Highlight matching braces
  (show-paren-mode t)

  ;; cua-mode. Like any other editor
  (cua-mode t)

  ;; Configure the cursor
  (setq-default
   cursor-type 'bar
   indent-tabs-mode nil
   cursor-in-non-selected-windows nil)
  (blink-cursor-mode 0)

  ;; Default column with
  (set-fill-column 95)

  ;; Start up in the home directory
  (setq default-directory "~/")

  ;; Make C-k always kill the whole line
  (setq kill-whole-line t)

  ;; Do not ding. Ever.
  (setq ring-bell-function 'ignore)

  ;; Dialogues always go in the modeline.
  (setq use-dialog-box nil)

  ;; Show tooltips on hover and not in the echo area.
  ;; Those are often cut of.
  (tooltip-mode)

  ;; Better line wraping
  (global-visual-line-mode 1)

Keybindings

  (bind-key "C-x k"      'kill-buffer-with-prejudice)
  (bind-key "C-x C-k"    'kill-buffer-and-window)
  (bind-key "M-p"        'switch-to-previous-buffer)
  (bind-key "M-i"        'delete-indentation)
  (bind-key "C-+"        'text-scale-increase)
  (bind-key "C--"        'text-scale-decrease)
  ;; buffer-list is not a good default
  (bind-key "C-x C-b"    'ibuffer)
  (bind-key "C-c n"      'display-line-numbers-mode)
  (global-set-key [f12] 'lux/indent-buffer)

Unbind useless keys.

  (unbind-key "C-<tab>") ;; prevent switching to tab mode randomly
  (unbind-key "C-h n")   ;; I have never wanted to see emacs news ever
  (unbind-key "C-h C-n") ;; why on earth is it bound to two keybindings??
  (unbind-key "C-x C-d") ;; list-directory is utterly useless given the existence of dired
  (unbind-key "C-x C-r") ;; as is find-file-read-only

Useful Functions

Edit This File

A simple funtion to open this file for quick editing.

  (defun edit-config ()
    (interactive)
    (find-file "~/.emacs.d/README.org"))

Reformating

Reindet the whole buffer with F1

  (defun lux/indent-buffer ()
    "Reindents the whole buffer"
    (interactive)
    (save-excursion
      (indent-region (point-min) (point-max) nil)))
  (global-set-key [f1] 'lux/indent-buffer)

Window Splitting

These are functions for splitting windows and move the cursor over immediately.

  (defun lux/split-right-and-enter ()
    "Split the window to the right and enter it."
    (interactive)
    (split-window-right)
    (other-window 1))
  (bind-key "M-3" 'lux/split-right-and-enter)

  (defun lux/split-below-and-enter ()
    "Split the window down and enter it."
    (interactive)
    (split-window-below)
    (other-window 1))
  (bind-key "M-2" 'lux/split-below-and-enter)

Rebind the default window controls to use "M-*" keys for ease-of-use

  (bind-key "M-1" 'delete-other-windows)
  (bind-key "M-0" 'delete-window)

Quick buffer switching

  (defun switch-to-previous-buffer ()
    "Switch to previously open buffer.Repeated invocations toggle between the two most recently open buffers."
    (interactive)
    (switch-to-buffer (other-buffer (current-buffer) 1)))

Fonts

Set up the fonts to use. I like the Iosevka font family.

  (set-face-attribute 'default nil :font "Fantasque Sans Mono-12")
  (set-face-attribute 'fixed-pitch nil :font "Fantasque Sans Mono-12")
  (set-face-attribute 'variable-pitch nil :font "Fantasque Sans Mono-12")

Completion

Ivy

Use Ivy to make minibuf promts better. Adds the ability to sort and filter.

  (use-package ivy
    :straight t
    :diminish
    :init
    (ivy-mode 1)
    (unbind-key "S-SPC" ivy-minibuffer-map)
    (setq ivy-height 30
          ivy-use-virtual-buffers t
          ivy-use-selectable-prompt t)
    :bind (("C-x b"   . ivy-switch-buffer)
           ("C-c C-r" . ivy-resume)
           ("C-s"     . swiper)))

  ;; ivy-rich makes Ivy look a little bit more like Helm.
  (use-package ivy-rich
    :straight t
    :after counsel
    :custom
    (ivy-virtual-abbreviate 'full
                            ivy-rich-switch-buffer-align-virtual-buffer t
                            ivy-rich-path-style 'abbrev)
    :init
    (ivy-rich-mode))

  (use-package ivy-hydra
    :straight t)

Smex

Sort commands by recency in ivy windows

  (use-package smex
    :straight t)

Counsel

  (use-package counsel
    :straight t
    :after ivy
    :init (counsel-mode 1)
    :bind (("C-c ;" . counsel-M-x)
           ("C-c U" . counsel-unicode-char)
           ("C-c i" . counsel-imenu)
           ("C-c y" . counsel-yank-pop)
           ("C-c r" . counsel-recentf)
           :map ivy-minibuffer-map
           ("C-r" . counsel-minibuffer-history))
    :diminish)

Ido

  (use-package ido
    :straight t
    :config (ido-mode 1)
    :bind (("C-x f" . ido-find-file)))

Autocompletion

  (use-package auto-complete
    :straight t
    :config
    (ac-config-default))

Magit

Magit is THE go to package for using git in emacs.

  (use-package magit
    :straight t
    :bind (("C-c g" . magit-status))
    :diminish magit-auto-revert-mode
    :diminish auto-revert-mode
    :custom
    (magit-remote-set-if-missing t)
    (magit-diff-refine-hunk t)
    :config
    (magit-auto-revert-mode t)
    (advice-add 'magit-refresh :before #'maybe-unset-buffer-modified)
    (advice-add 'magit-commit  :before #'maybe-unset-buffer-modified)
    (setq magit-completing-read-function 'ivy-completing-read)
    (add-to-list 'magit-no-confirm 'stage-all-changes))

  (use-package libgit
    :straight t
    :disabled
    :after magit)

The advice-add entries are thereto stop magit from bugging us to save buffers when commiting and refreshing.

Helper Functions

  (autoload 'diff-no-select "diff")
  (defun current-buffer-matches-file-p ()
    "Return t if the current buffer is identical to its associated file."
    (when (and buffer-file-name (buffer-modified-p))
      (diff-no-select buffer-file-name (current-buffer) nil 'noasync)
      (with-current-buffer "*Diff*"
        (and (search-forward-regexp "^Diff finished \(no differences\)\." (point-max) 'noerror) t))))

Clear modified bit on all unmodified buffers

  (defun maybe-unset-buffer-modified (&optional _)
    (interactive)
    (dolist (buf (buffer-list))
      (with-current-buffer buf
        (when (and buffer-file-name (buffer-modified-p) (current-buffer-matches-file-p))
          (set-buffer-modified-p nil)))))

Don't prompt to save unmodified buffers on exit.

  (advice-add 'save-buffers-kill-emacs :before #'maybe-unset-buffer-modified)

  (defun kill-buffer-with-prejudice (&optional _)
    "Kill a buffer, eliding the save dialogue if there are no diffs."
    (interactive)
    (when (current-buffer-matches-file-p) (set-buffer-modified-p nil))
    (kill-buffer))

Org Mode

This is the main configuration for the infamous org-mode. The most important parts are configuring key bindings to quickly access the files we have defined above.

  (use-package org
    :straight t
    ;; Always get this from the GNU archive.
    :bind (:map org-mode-map
           ("M-s-<return>" . org-insert-todo-heading)
           ("M-<return>" . org-insert-heading-respect-content)
           ("C-c a s"  . org-emphasize)
           ("C-c -"    . org-edit-special))
    :hook ((org-mode . visual-line-mode)
           (org-mode . org-indent-mode))
    :config
    (setq org-pretty-entities t
          org-indent-mode t
          org-hide-leading-stars nil
          org-link-file-path-type 'relative
          org-hide-emphasis-markers t
          )

Archive Location

When archiving items in org files, the default ist to crate a separate file named <filename>.org_archive. This clutters up my notes folder quite a bit, as I use a lot of separate files with thier respective archives. All archives should be stored in a single .archive file per directory.

  (setq org-archive-location "./.archive::* From %s")

Templates

Babel

Here we set custom templates to be used for structure expansion. These are used when we type "<" folowed by the shortcut for a template and hit "TAB". e.g. "<s TAB" expands to #+BEGIN_SRC ?\n\n#+END_SRC

Use org-tempo to quickly insert the structures

  (require 'org-tempo)

Shortcut for creating emacs-lisp code blocks. This is used extensively in this very file.

  (add-to-list 'org-structure-template-alist '("el" . "src emacs-lisp"))

Misc Packages

All The Icons

We want to have some nice looking icons

  (use-package all-the-icons
    :straight t)

Recentf

Show recent files in the buffer selection

  (use-package recentf
    :straight t
    :init (recentf-mode t)
    :config
    (add-to-list 'recentf-exclude "\\.emacs.d")
    (add-to-list 'recentf-exclude ".+tmp......\\.org"))

Rainbow Delimiters

We want to have some nicely colored delimiters when reading and writing lisp code

  (use-package rainbow-delimiters
    :straight t
    :hook (prog-mode . rainbow-delimiters-mode))

Markdown Mode

  (use-package markdown-mode
    :straight t
    :mode ("\\.md$" . gfm-mode)
    :config
    (when (executable-find "pandoc")
      (setq markdown-command "pandoc -f markdown -t html")))

Duplicate Thing

Quick bind to C-c u to duplicate the current line

  (use-package duplicate-thing
    :straight t
    :bind (("C-c u" . duplicate-thing)))

ACE Window

Small package to quickly switch tiled windows. Use M-o to quickly switch.

  (use-package ace-window
    :straight t
    :bind (("M-o" . 'ace-window))
    :config
    (custom-set-faces
     '(aw-leading-char-face
       ((t (:inherit ace-jump-face-foreground :height 3.0))))
     ))

Ag

Ag.el allows you to search using ag from inside Emacs. You can filter by file type, edit results inline, or find files.

Documentation

  (use-package ag
    :straight t)

Programming

Elisp

Some customization for writing elisp

  (defun my-elisp-mode-hook ()
    "My elisp customizations."
    (electric-pair-local-mode 1)
    (add-hook 'before-save-hook 'check-parens nil t)
    (auto-composition-mode nil))

  (add-hook 'emacs-lisp-mode-hook 'my-elisp-mode-hook)

Load additional files

All information about the current user should reside in the personal.el file. This file contains personal information like name, email or other identifying information. This file should contain definitions, that are the same on every device, but sould not be commited to a repository.

  (setq personal-file "~/.emacs.d/personal.el")
  (load personal-file 'noerror)

Load a custom file from the emacs home dir. This file is specific to the machine emacs runs on. It conatins customizations and file locations that are machine dependend.

  (setq custom-file "~/.emacs.d/custom.el")
  (load custom-file 'noerror)