legacy-dotfiles/emacs/.emacs.d/init.org

#+TITLE: Emacs init
#+PROPERTY: tangle init2.el
#+STARTUP: showall
#+OPTIONS: author:nil num:nil toc:nil
#+MACRO: key   @@html:<kbd>$1</kbd>@@@@ascii:`$1'@@
#+HTML_HEAD: <link href="https://ryuslash.org/org.css" rel="stylesheet" type="text/css">

* About this file

#+INCLUDE: "org/intro.org" :minlevel 2

* Use lexical binding

  For some of these functions, and general coolness, lexical binding
  is a must. Without it, closures cannot be made.

  #+BEGIN_SRC emacs-lisp :padline no
    ;; -*- lexical-binding: t -*-
  #+END_SRC

* Some general-purpose functions and macros

  A configuration as big as mine is bound to have some functions and
  macros that are used in many places.

** Turn off

   This macro creates a function that will turn off a minor mode that
   passed to it.

   #+BEGIN_SRC emacs-lisp
     (defmacro turn-off (func)
       "Create a function that will turn off FUNC when called."
       `(lambda () (eval (,func -1))))
   #+END_SRC

** Change setting

   Sometimes a mode just needs to change a certain setting to a
   specific value.

   #+BEGIN_SRC emacs-lisp
     (defmacro change-settings (&rest settings)
       "Create a function that changes the value of NAME to VALUE."
       `(lambda () (setq ,@settings)))
   #+END_SRC

** Whitespace only with tabs

   In some modes I want to see the tabs in a buffer. Though I don't
   want to be overwhelmed by seeing all spaces and line endings.

   #+BEGIN_SRC emacs-lisp
     (defvar whitespace-style)

     (defun oni:whitespace-only-tabs ()
       (setq-local whitespace-style '(face tabs))
       (whitespace-mode))
   #+END_SRC

** Eval after init

   Some things can only really work after all other initialization
   functions have completed. For example, any functions that require
   any ELPA packages to be loaded, unless you want to load it in your
   init manually (and have it loaded again later on after your config
   has run).

   #+BEGIN_SRC emacs-lisp
     (defmacro oni:eval-after-init (&rest body)
       "Defer execution of BODY until after Emacs init."
       (declare (indent 0))
       `(add-hook 'emacs-startup-hook #'(lambda () ,@body)))
   #+END_SRC

* Set some personal information

  This information is used by some emacs commands and modules to make
  your life easier.

  #+BEGIN_SRC emacs-lisp
    (setq user-full-name "Tom Willemse"
          user-mail-address "tom@ryuslash.org")
  #+END_SRC

* Clean up some UI elements

  Some elements are only really useful if you use the mouse. Which I
  don't, not if I can help it. Only when browsing the web or using the
  odd graphical application do I touch the mouse, and even then as
  little as I can.

** Menu bar

   The menu bar is one of the UI elements which work best with mouses.
   Sure you can change your toolkit's key bindings to allow you to
   more easily navigate, but {{{key(M-x)}}} or {{{key(M-`)}}}[fn:1]
   are easier if you don't use the mouse. Long story short: It has got
   to go.

   #+BEGIN_SRC emacs-lisp
     (menu-bar-mode -1)
   #+END_SRC

** Tool bar

   The toolbar is another such thing, and it takes up quite a bit more
   space too. Icons can look pretty cool, but in the end if you're not
   going to click them they don't really server much of a purpose.
   Again: It has got to go.

   #+BEGIN_SRC emacs-lisp
     (tool-bar-mode -1)
   #+END_SRC

** Blinking cursor

   I suppose a blinking cursor doesn't get lost very easily. But on
   the other hand, it can induce quite a few more headaches.

   I've noticed that I don't really lose my cursor position all that
   much, really, so there doesn't seem to be any point in making it
   blink. Here we go again: It has got to go.

   #+BEGIN_SRC emacs-lisp
     (blink-cursor-mode -1)
   #+END_SRC

** Line numbers

   As I'm currently using svg-mode-line-themes[fn:2] for my ~mode-line~ I
   don't need to show these. Also I didn't really use them much, I
   don't often need to know what line I'm on.

   #+BEGIN_SRC emacs-lisp
     (line-number-mode -1)
   #+END_SRC

** Tooltips

   Tooltips are another one of those UI elements that aren't quite
   keyboard-friendly. As usually this information is shown just as well
   in the echo area, this is not necessary.

   #+BEGIN_SRC emacs-lisp
     (tooltip-mode -1)
   #+END_SRC

** Cursor type

   I prefer using a bar as a cursor, as opposed to a box. Using a bar
   is a better way of representing the location of the cursor, in my
   opinion.

   #+BEGIN_SRC emacs-lisp
     (setq-default cursor-type 'bar)
   #+END_SRC

** Cursors in inactive windows

   I use a bar cursor that's already pretty thin, so having an even
   thinner one in inactive windows is not very clear. Even when I
   was using a box cursor I didn't like seeing a hollow box everywhere
   my focus /wasn't/.

   #+BEGIN_SRC emacs-lisp
     (setq-default cursor-in-non-selected-windows nil)
   #+END_SRC

** Long lines

   Sometimes, very long lines can't help but show up in code. The
   default of wrapping lines around to the next line and showing an
   image in the fringe is very visually disturbing to me when looking
   at code[fn:3]. So I prefer to have it just run off the screen.

   #+BEGIN_SRC emacs-lisp
     (setq-default truncate-lines t)
   #+END_SRC

** The default frame

   Usually, most of these settings would be done with functions like
   =set-frame-font= or =scroll-bar-mode=, but working with the Emacs
   Daemon sometimes creates extra complications, because you might
   start a graphical environment at some point (I usually do
   immediately), but the startup process isn't.

*** Internal border

   Set the internal border width to 0. This makes a small difference,
   with my current setup it causes my window's width to increase from
   120 to 121. Small, I know, but I'm very greedy when it comes to
   screen space.

   #+NAME: default-frame-internal-border
   #+BEGIN_SRC emacs-lisp :tangle no
     (internal-border-width . 0)
   #+END_SRC

*** A fantastic font

    I've tried several fonts, and all of them were nice, but came up
    short on some way. Some didn't have italic variants, some had
    dotted zeroes instead of dashed zeroes, some even had entirely
    clear zeroes which make them look like ~O~'s, others had
    boring-looking parentheses[fn:4]. Not Fantasque Sans
    Mono[fn:5][fn:6], it is awesome. If your web browser supports web
    fonts you should also see it used in the code blocks here.

    For normal Emacs setups you might use the =set-frame-font= function
    like so:

    #+BEGIN_SRC emacs-lisp :tangle no
      (set-frame-font "Fantasque Sans Mono-13" nil t)
    #+END_SRC

    However, this doesn't work when running Emacs as a Daemon. You
    could (especially with lexical binding) add an
    =after-make-frame-functions= hook or something similar, but I find
    it easier to just specify the font in the =default-frame-alist=.

    #+NAME: default-frame-font
    #+BEGIN_SRC emacs-lisp :tangle no
      (font . "Fantasque Sans Mono-13")
    #+END_SRC

*** Scroll bar

    The scroll-bar is almost just as informative as the current line
    number and buffer position information shown in the (my) mode
    line. As I don't usually need to know where I am, other than the
    current line number occasionally, and I don't use the mouse, the
    scroll bar doesn't add anything and only takes up space. Once
    more: It has got to go.

    Normally you would use something along the lines of:

    #+BEGIN_SRC emacs-lisp :tangle no
      (scroll-bar-mode -1)
    #+END_SRC

    However, this doesn't work when running Emacs as a Daemon. So
    instead I specify it in the =default-frame-alist=.

    #+NAME: default-frame-scroll-bar
    #+BEGIN_SRC emacs-lisp :tangle no
      (vertical-scroll-bars . nil)
    #+END_SRC

*** Setting the option

    So I've explained the reasons for each individual setting, but to
    get them to work they have to be put in the =default-frame-alist=.
    Here is the final setting:

    #+BEGIN_SRC emacs-lisp :noweb yes
      (setq default-frame-alist
            `(<<default-frame-internal-border>>
              <<default-frame-font>>
              <<default-frame-scroll-bar>>))
    #+END_SRC

** Frame title

   Show the buffer name in the frame title to make multiple frames
   identifiable by the buffer they're showing.

   #+BEGIN_SRC emacs-lisp
     (setq frame-title-format '(:eval (concat "GNU Emacs: " (buffer-name))))
   #+END_SRC

** Don't show dialog boxes

   Unfortunately this doesn't remove /all/ dialog boxes, but at least it
   keeps some of them from popping up. According to the docstring it
   should only change anything for when the mouse is used, which I
   don't ever do, but I still feel safer keeping this in my
   configuration.

   #+BEGIN_SRC emacs-lisp
     (setq use-dialog-box nil)
   #+END_SRC

** Split windows equally

   When splitting windows, give them all an equal amount of space. For
   those very few time that I have more than two windows in my Emacs
   frame it is much nicer to have each of them get ~33% space instead
   of 50%, 25% and 25%. The way I have my desktop set-up I don't ever
   split my windows horizontally.

   #+BEGIN_SRC emacs-lisp
     (setq window-combination-resize t)
   #+END_SRC

** Keep the cursor steady when scrolling

   When scrolling through the buffer with, for example, {{{key(C-v)}}}
   or {{{key(M-v)}}}, I find it much more intuitive to have the cursor
   stay in the relative screen position from before. Otherwise I get
   confused every time.

   #+BEGIN_SRC emacs-lisp
     (setq scroll-preserve-screen-position t)
   #+END_SRC

** Don't show a mode line for completions

   One of the things I dislike about Emacs is its rigidity concerning
   windows and other UI elements. One very simple way to make it
   /feel/ less so is to show less of it where possible. A mode line for
   completion buffers creates more separation than necessary, and I
   can't recall a single time where I've used the completion's mode
   line for anything.

   #+BEGIN_SRC emacs-lisp
     (add-hook 'completion-list-mode-hook
               (lambda () (setq mode-line-format nil)))
   #+END_SRC

** Use pixels, not columns/rows to resize frames.

   As of Emacs 24.4 frames can resize to pixel sizes instead of
   columns and rows. This keeps annoying gaps from forming when using
   a tiling window manager. The real difference is that when this is
   done now, the actual text portions of the window get the extra
   space, not some fringe or margin. This looks much nicer.

   #+BEGIN_SRC emacs-lisp
     (setq frame-resize-pixelwise t)
   #+END_SRC

* Add org-mode appointments to the diary

  Diary offers reminders, which can be useful when scheduling
  appointments.

  #+BEGIN_SRC emacs-lisp
    (defadvice org-agenda-redo (after ext:org-agenda-redo-add-appts)
      "Pressing `r' on the agenda will also add appointments."
      (setq appt-time-msg-list nil)
      (org-agenda-to-appt))
  #+END_SRC

* Close ansi-term buffer after exit

  After the ansi-term process ends it leaves a buffer. I don't use
  ansi term in such a way that this has ever been useful, so just kill
  the ansi-term buffer after the process quits, no matter the exit
  status. Usually this comes about when I press {{{kbd(C-d)}}} at the
  command prompt.

  #+BEGIN_SRC emacs-lisp
    (defadvice term-handle-exit (after oni:kill-buffer-after-exit activate)
      "Kill the term buffer if the process finished."
      (kill-buffer (current-buffer)))
  #+END_SRC

* Stumpwm integration

  This variable, macro and function help with integrating Emacs and
  Stumpwm. They are used by some other functions to make the two seem
  extra connected.

  #+BEGIN_SRC emacs-lisp
    (defvar oni:stumpish-program
      (expand-file-name
       "~/.local/share/quicklisp/local-projects/stumpwm/contrib/util/stumpish/stumpish")
      "The location of the stumpish executable.")

    (defmacro oni:stumpwm (&rest body)
      "Execute BODY in stumpwm."
      (declare (indent 0))
      `(call-process oni:stumpish-program nil nil nil
                     ,(format "eval '%S'" `(progn ,@body))))

    (defun oni:stumpwm-command (cmd)
      "Execute CMD in stumpwm."
      (call-process oni:stumpish-program nil nil nil cmd))

    (defun oni:stumpwm-echo (message)
      (call-process oni:stumpish-program nil nil nil (format "echo %s" message)))
  #+END_SRC

** Fall back on stumpwm when moving around

   Using the function specified in [[Stumpwm integration]] wrap the
   =windmove-do-window-select= function and catch any error produced,
   hoping it's the error that there's no more window to move to and
   then request that stumpwm move the focus in the same direction as
   windmove would have.

   #+BEGIN_SRC emacs-lisp
     (defadvice windmove-do-window-select
         (around oni:windmove-stumpwm activate)
       "If no window can be moved to, move stumpwm."
       (condition-case err
           ad-do-it
         (error (oni:stumpwm-command
                 (format "move-focus %s" (ad-get-arg 0))))))
   #+END_SRC

* Don't just quit Emacs with {{{key(C-x C-c)}}} in the daemon

  When working with Emacs as a daemon, which I do almost all of the
  time, I prefer using {{{key(C-x C-c)}}} to close the current frame
  instead of the entire session. Before this change I would
  occasionally close my session by mistake.

  #+BEGIN_SRC emacs-lisp
    (defun oni:close-client-window ()
      "Close a client's frames."
      (interactive)
      (server-save-buffers-kill-terminal nil))

    (when (daemonp)
      (global-set-key (kbd "C-x C-c") 'oni:close-client-window))
  #+END_SRC

* Don't minimize the frame with {{{key(C-z)}}}

  One of the more annoying things that can happen is accidentally
  minimizing the frame you're working with. This doesn't really matter
  if you're working on a normal stacking window manager, but with a
  tiling window manager and no task bar this just causes the Emacs
  frame to hang until it is refocused or disappear with no way to get
  it back.

  #+BEGIN_SRC emacs-lisp
    (when (or window-system (daemonp))
      (global-unset-key (kbd "C-z")))
  #+END_SRC

* Use the right dictionary

  One of the caveats of using two (or more) languages in a single
  installation of Gnus is that ispell sometimes gets confused. Having
  come across a stackoverflow question[fn:7] about just this subject
  it was easy to modify the source code posted there to come up with
  this.

  *Note:* See my [[Function declarations][note]] on function declarations about the use of
  =declare-function=.

  #+BEGIN_SRC emacs-lisp
    (declare-function message-narrow-to-headers-or-head "message")
    (declare-function message-fetch-field "message")

    (defun oni:switch-ispell-dictionary ()
      (save-excursion
        (message-narrow-to-headers-or-head)
        (when (string-match (rx (and "@" (or "aethon" "picturefix") ".nl>") eol)
                            (message-fetch-field "From"))
          (ispell-change-dictionary "nl_NL"))))

    (add-hook 'message-setup-hook 'oni:switch-ispell-dictionary)
  #+END_SRC

* Don't let shr use background color

  Reading mail in Gnus is very nice, but shr has become a little too
  good at its job. Add to this the many occasions when a background is
  specified without specifying a foreground, plus a color theme that
  is the inverse of what is usually expected, and you can get
  hard-to-read HTML messages, gray foreground and gray background.

  I've looked at the other possible renderers, but they don't look
  very nice compared to shr. So just remove its ability to add
  background colors.

  *Note:* See my [[Function declarations][note]] on function declarations about the use of
  =declare-function=.

  #+BEGIN_SRC emacs-lisp
    (declare-function shr-colorize-region "shr")

    (defun oni:shr-colorize-remove-last-arg (args)
      "If ARGS has more than 3 items, remove the last one."
      (if (> (length args) 3)
          (butlast args)
        args))

    (with-eval-after-load 'shr
      (advice-add #'shr-colorize-region :filter-args
                  #'oni:shr-colorize-remove-last-arg))
  #+END_SRC

* Optimized ~with-eval-after-load~

  First offered [[http://www.lunaryorn.com/2013/05/01/byte-compiling-eval-after-load.html][here]] and then later updated [[http://www.lunaryorn.com/2013/06/25/introducing-with-eval-after-load.html][here]] (when
  ~with-eval-after-load~ was added). Makes for very nice on-demand
  settings loading.

  #+BEGIN_SRC emacs-lisp
    ;; http://www.lunaryorn.com/2013/06/25/introducing-with-eval-after-load/
    (defmacro stante-after (feature &rest forms)
      "After FEATURE is loaded, evaluate FORMS.

    FEATURE may be an unquoted feature symbol or a file name, see
    `eval-after-load'."
      (declare (indent 1) (debug t))
      `(,(if (or (not byte-compile-current-file)
                 (if (symbolp feature)
                     (require feature nil :noerror)
                   (load feature :no-message :no-error)))
             `progn
           (message "stante-after: cannot find %s" feature)
           'with-no-warnings)
        (with-eval-after-load ',feature ,@forms)))
  #+END_SRC

* Remember SQL input

  Remembering input between sessions is a good thing.

  #+BEGIN_SRC emacs-lisp
    (stante-after sql
      (setf sql-input-ring-file-name
            (expand-file-name "~/.emacs.d/sqliinput")))
  #+END_SRC

* Lazily load some buffers

  Don't load all buffers right away. Having a lot of buffers and
  switching between projects a lot can take up quite a bit of time.

  *Note:* See my [[Vacuous defvar][note]] on vacuous defvar for this use of =defvar=.

  #+BEGIN_SRC emacs-lisp
    (defvar desktop-restore-eager)
    (setq desktop-restore-eager 5)
  #+END_SRC

* Fix some term keybindings

  =ansi-term= passes along a lot of characters correctly, but things
  like =forward-delete-word= are not, by default. This is confusing when
  you see one thing and another is sent. Passing the correct keys
  directly to the terminal fixes this problem.

  *Note:* See my [[Vacuous defvar][note]] on vacuous defvar for this use of =defvar=.

  *Note:* See my [[Function declarations][note]] on function declarations about the use of
  =declare-function=.

  #+BEGIN_SRC emacs-lisp
    (defvar term-raw-map)
    (declare-function term-send-raw-string "term")

    (defun oni:set-term-keys ()
      (cl-flet ((zcommand (key)
                  (lambda ()
                    (interactive) (term-send-raw-string key))))
        (define-key term-raw-map
          (kbd "C-<backspace>") (zcommand "\C-H"))))

    (add-hook 'term-mode-hook #'oni:set-term-keys)
  #+END_SRC

* Ask for a ~y~ or ~n~, not ~yes~ or ~no~.

  Emacs starts out asking for you to type ~yes~ or ~no~ with most
  important questions. It is possible that this is used for such
  important questions where accidentally saying ~yes~ when you meant ~no~
  would be catastrophic (or at least could be). However, I've never
  (so far) had this problem, and I find it quite tedious to have to
  write out ~yes~ or ~no~ and then press {{{kbd(RET)}}}, give me a simple
  ~y~ or ~n~ with no {{{kdb(RET)}}} required and I'm quite happy.

  #+BEGIN_SRC emacs-lisp
    (defalias 'yes-or-no-p 'y-or-n-p)
  #+END_SRC

* Use =hippie-expand=, not =dabbrev-expand=

  I've never actually used =dabbrev-expand=, and only rarely use
  =hippie-expand= really, but since =hippie-expand= also includes a
  =dabbrev= expander and a lot more than just that, it seems alright to
  do this.

  #+BEGIN_SRC emacs-lisp
    (defalias 'dabbrev-expand 'hippie-expand)
  #+END_SRC

* Setting up =load-path=

  First, to help, I create a function that takes a path, adds it to
  =load-path= and then checks to see if there is a file named
  ~loaddefs.el~ in the given path. If there is, it loads it. This
  ~loaddefs.el~ file is something that is created from autoload cookies
  in the files in some of these paths.

  Since the =load-path= is also important during byte-compilation, this
  function should be defined both at run-time and compile-time.

  #+BEGIN_SRC emacs-lisp
    (eval-and-compile
      (defun oni:loadpath-add-and-autoload (path)
        "Add PATH to `load-path' and load a `loaddefs.el' if it exists."
        (add-to-list 'load-path path)
        (let ((loaddefs (concat path "/loaddefs.el")))
          (when (file-exists-p loaddefs)
            (load loaddefs)))))
  #+END_SRC

  After that I add some directories to my =load-path= so I can use these
  libraries when wanted. One of these is the ~site-lisp~ directory in my
  ~.emacs.d~ directory, which is where I keep most of my personal
  non-ELPA modules (like module-specific initialization files). There
  are also some directories I include in ~vendor-lisp~, which is where I
  keep modules that I didn't write myself and, for some reason, can't
  or don't want to use ELPA for. Again it is important to realize that
  this information is relevant both at run-time and compile-time, so
  we wrap it with an =eval-and-compile=.

  #+BEGIN_SRC emacs-lisp
    (eval-and-compile
      (mapc #'oni:loadpath-add-and-autoload
            '("~/.emacs.d/site-lisp"
              "~/.emacs.d/vendor-lisp/mozrepl"
              "~/.emacs.d/vendor-lisp/eap" "/usr/share/emacs/site-lisp"
              "/usr/lib/node_modules/tern/emacs/"
              "~/.emacs.d/vendor-lisp/habitrpg.el")))
  #+END_SRC

* Some unconditional settings

  Here are some settings that either need to be changed before certain
  modules load, or that don't belong in any specific module.

** Gnus init file

   I put my gnus initialization file right where I put all my
   module-specific initialization files. Gnus is special, though: It
   loads the file every time you start it. That keeps it from using a
   simple =(eval-after-load 'gnus '(load "gnus-init"))=.

   *Note:* See my [[Vacuous defvar][note]] on vacuous defvar for this use of =defvar=.

   #+BEGIN_SRC emacs-lisp
     (defvar gnus-init-file)
     (setq gnus-init-file "~/.emacs.d/site-lisp/gnus-init")
   #+END_SRC

** Turn off bidirectional text

   To speed things up a little, and because I have no contacts at all
   (so far) who use right-to-left text, there is no reason for me to
   use bidirectional text. For this reason I tell Emacs to always use
   left-to-right by default, instead of checking each paragraph.

   #+BEGIN_SRC emacs-lisp
     (setq-default bidi-paragraph-direction 'left-to-right)
   #+END_SRC

** Don't use tabs

   There is a war going on out there. Actually there are several, but
   the one I'm talking about here is the one about tabs vs. spaces. I
   have been deeply entrenched in the spaces camp for quite a while.
   Indentation always gets screwy for me if I don't use the exact same
   =tab-width= everyone else uses. I just like the consistency of using
   spaces.

   #+BEGIN_SRC emacs-lisp
     (setq-default indent-tabs-mode nil)
   #+END_SRC

** Use four spaces for indentation

   I once, long ago, started out with using eight spaces for each
   level of indentation. Although I think, technically, I was using
   tabs. This means that even just 3 levels of indentation take up a
   /huge/ amount of space that can't be used for anything else. Since I
   also try to limit the length of the lines in my code, this can make
   for very little code per line.

   I also tried (and enjoyed) two spaces, but after a while, looking
   at bigger files, I noticed that it all becomes a blur. Two spaces
   is not a big-enough visual difference to make code read nicely, in
   my opinion.

   So far, I have quite enjoyed four spaces for most code[fn:8].

   #+BEGIN_SRC emacs-lisp
     (setq-default tab-width 4)
   #+END_SRC

** Keep the message buffer from growing too large

   Keep at most one-thousand messages in the ~*Messages*~ buffer. I can
   leave my Emacs session running for quite long times, sometimes
   days, at a time. If there are a lot of messages it can get a little
   tricky to manage/search.

   #+BEGIN_SRC emacs-lisp
     (setq message-log-max 1000)
   #+END_SRC

** Don't start =elnode= when Emacs starts

   Elnode is an awesome project and I'm still looking for a moment
   where I have the inspiration and time to actually do something with
   it. I started at some point, but then I couldn't get the cookies to
   work and I switched over to using Common Lisp, only to eventually
   stop developing the project because there was not chance of it
   seeing any use in the foreseeable future.

   There is one little annoyance, though, and that is the fact that
   elnode will start itself up when Emacs starts. I don't want that.

   This bit of code can't be put in an =eval-after-load= or anything
   like that because by the time it would be evaluated, elnode would
   already have started.

   *Note:* See my [[Vacuous defvar][note]] on vacuous defvar for this use of =defvar=.

   #+BEGIN_SRC emacs-lisp
     (defvar elnode-do-init)
     (setq elnode-do-init nil)
   #+END_SRC

* Show python package name instead of file name

  When working with python, knowing which package I'm in usually tells
  me more about what I'm doing than the file name, especially when
  working with django where almost every app will have a ~tests.py~ and
  a ~models.py~. Of course =uniquify= fixes this pretty well too, though
  in this case, it's less cool (imo).

  First we define two functions that help us determine the package
  name of the current file and the parent package name of the current
  file. Finally we define a third function which determines the full
  package name of the current buffer.

  #+BEGIN_SRC emacs-lisp
    (defun oni:python--get-current-module-name ()
      "Get the name of the current python module.

    This is very simply just the filename of the current buffer with
    the extension and pyath removed."
      (file-name-sans-extension
       (file-name-nondirectory (buffer-file-name))))

    (defun oni:python--get-parent-module-name (&optional dir)
      "This gets the currend file's parent module.

    This function recursively gathers the parent package name of
    either DIR or the current buffer's file name. Any directory where
    an `__init__.py' file is found is considered to be a package.

    This function returns either the parent package, with its
    parents, or nil if the current directory isn't a python
    package.."
      (let* ((base (directory-file-name
                    (file-name-directory (or dir (buffer-file-name)))))
             (package (file-name-nondirectory base)))
        (if (file-exists-p (concat base "/__init__.py"))
            (let ((parent (oni:python--get-parent-module-name base)))
              (if parent
                  (concat parent "." package)
                package))
          nil)))

    (defun oni:python-package-name ()
      (let ((current-module (oni:python--get-current-module-name)))
        (if (file-exists-p "__init__.py")
            (concat (oni:python--get-parent-module-name)
                    "." current-module)
          current-module)))
  #+END_SRC

  After all this we make Emacs show the package name rather than the
  file name in the mode-line.

  #+BEGIN_SRC emacs-lisp
    (defun oni:python-package-buffer-identification ()
      "Have `mode-line-buffer-identification' show the python package name."
      (setq mode-line-buffer-identification
            '(:eval (oni:python-package-name))))

    (add-hook 'python-mode-hook #'oni:python-package-buffer-identification)
  #+END_SRC

* Add some known symbols for .conkerorrc/init.js to js2-mode

  Conkeror has a lot of functions, and I don't like seeing them all as
  unknowns. So add them to known symbols.

  *Note:* See my [[Vacuous defvar][note]] on vacuous defvar for this use of =defvar=.

  #+BEGIN_SRC emacs-lisp
    (defvar js2-additional-externs)

    (defun oni:js2-add-conkeror-symbols ()
      "Add known/used conkeror symbols to additional externs."
      (when (string-suffix-p ".conkerorrc/init.js" (buffer-file-name))
        (setq js2-additional-externs
              '( ;; Functions
                "add_hook" "check_buffer" "co_return" "content_buffer"
                "define_browser_object_class" "define_key" "define_webjump"
                "dumpln" "get_current_profile" "get_home_directory"
                "get_recent_conkeror_window"
                "hints_minibuffer_annotation_mode" "interactive" "load_spec"
                "load_spec_uri_string" "load_url_in_new_buffer" "make_file"
                "make_uri" "mode_line_adder"
                "open_download_buffer_automatically" "prefix_completer"
                "read_browser_object" "register_user_stylesheet"
                "remove_hook" "require" "send_http_request" "session_pref"
                "shell_command_blind" "theme_load"
                ;; Variables
                "Cc" "Ci" "browser_object_history_url" "browser_object_links"
                "buffer_count_widget" "buffer_icon_widget" "content_buffer"
                "content_buffer_form_keymap" "content_buffer_normal_keymap"
                "content_buffer_text_keymap" "content_policy_accept"
                "content_policy_bytype" "content_policy_reject" "cwd"
                "default_base_keymap" "default_global_keymap"
                "downloads_status_widget" "external_content_handlers"
                "hint_digits" "load_paths" "read_buffer_show_icons"
                "read_url_handler_list" "session_auto_save_auto_load"
                "theme_load_paths" "title_format_fn" "url_remoting_fn"
                ;; Keyword argument
                "$alternative" "$browser_object" "$completer" "$completions"
                "$initial_value" "$options" "$prompt" "$sort_order"
                "$use_bookmarks" "$use_history" "$use_webjumps"))))

    (add-hook 'js2-init-hook #'oni:js2-add-conkeror-symbols)
  #+END_SRC

* Teach eww about <code> tags

  Strangely enough, ~eww~ doesn't seem to be aware of =<code>= HTML tags.
  Luckily it's trivial to teach it. It does know about =<pre>= HTML
  tags, and basically I just want =<code>= tags to be treated almost as
  =<pre>= tags, so to do that we just have to define a =shr-tag-code=
  function. I've copied the =shr-tag-pre= function and removed the calls
  to =ensure-newline=, because =<code>= tags are inline tags.

  In order to remain a little future-proof, it should only be done if
  it doesn't already exist.

  *Note:* See my [[Vacuous defvar][note]] on vacuous defvar for this use of =defvar=.

  *Note:* See my [[Function declarations][note]] on function declarations about the use of
  =declare-function=.

  #+BEGIN_SRC emacs-lisp
    (defvar shr-folding-mode)
    (declare-function shr-indent "shr")
    (declare-function shr-generic "shr")

    (with-eval-after-load 'shr
      (unless (fboundp 'shr-tag-code)
        (defun shr-tag-code (cont)
          (let ((shr-folding-mode 'none))
            (shr-indent)
            (shr-generic cont)))))
  #+END_SRC

* Use scheme-mode for scsh interpreted files

  Set the major mode for files interpreted by scsh (for example, by
  having ~#!/usr/local/bin/scsh~ at the top) to use =scheme-mode=.

  #+BEGIN_SRC emacs-lisp
    (add-to-list 'interpreter-mode-alist '("scsh" . scheme-mode))
  #+END_SRC

* Set default scheme implementation

  Set the default implementation for geiser to guile so it doesn't ask
  which implementation to use every time.

  #+BEGIN_SRC emacs-lisp
    (defvar geiser-default-implementation)

    (with-eval-after-load 'geiser
      (setq geiser-default-implementation 'guile))
  #+END_SRC

* Setup eww-lnum

  As recommended in the [[https://github.com/m00natic/eww-lnum][README]], set the keys in the =eww-mode-map=.

  #+BEGIN_SRC emacs-lisp
    (defvar eww-mode-map)

    (with-eval-after-load 'eww
      (define-key eww-mode-map "f" 'eww-lnum-follow)
      (define-key eww-mode-map "F" 'eww-lnum-universal))
  #+END_SRC

* Don't compile scss files

  By default =scss-mode= tries compiling a file each time it's saved. I
  don't have SCSS properly installed globally so this always fails,
  highly annoying.

  #+BEGIN_SRC emacs-lisp
    (defvar scss-compile-at-save)

    (with-eval-after-load 'scss-mode
      (setq scss-compile-at-save nil))
  #+END_SRC

* Change listings in dired

  The number of bytes a file is doesn't usually tell me much when it's
  something like ~292837~. I prefer seeing just how many Kb or Mb a
  certain file is. I also don't need to see the ~.~ and ~..~ directories
  when I insert directories into the current dired buffer, as there is
  a great chance that the current and parent directory are already
  shown in the buffer.

  #+BEGIN_SRC emacs-lisp
    (defvar dired-subdir-switches)

    (with-eval-after-load 'dired
      (setq dired-listing-switches "-alh"
            dired-subdir-switches "-Alh"))
  #+END_SRC

* Useful functions

  During your editing in Emacs you will undoubtedly find the need to
  define your own editing functions or macros. Here are mine.

** Delete the contents of the string at point

   First we define the function. It was inspired by [[http://www.masteringemacs.org/][Mickey's post on
   swapping quote symbols]], mostly copied even. First we check if we
   are even in a string, and if not we throw an error, after that we
   move back to the beginning of the string, store that point, go to
   the end of the string (using =forward-sexp=) and then delete the
   region between the two points (non-inclusive).

   #+BEGIN_SRC emacs-lisp
     (defun oni:delete-string-contents ()
       (interactive)

       (unless (nth 3 (syntax-ppss))
         (error "You must be in a string for this command to work"))

       (save-excursion
         (while (nth 3 (syntax-ppss)) (forward-char -1))

         (let ((bos (point)))
           (forward-sexp)
           (delete-region (1+ bos) (1- (point))))))
   #+END_SRC

   Since for interactive functions it's kind of a pain to have to use
   a personal "namespace" I prefer naming them regularly as if they're
   just part of the environment. If ever Emacs comes up with a similar
   function with the same name, I'd prefer using the built-in version.

   #+BEGIN_SRC emacs-lisp
     (unless (fboundp 'delete-string-contents)
       (defalias 'delete-string-contents 'oni:delete-string-contents))
   #+END_SRC

   Lastly, any function worth using often should probably be easily
   accessible with a keybinding. In my case the {{{key(C-c i s)}}} is
   inspired by the Vim keybindings like {{{key(ci")}}}.

   #+BEGIN_SRC emacs-lisp
     (global-set-key (kbd "C-c i s") 'delete-string-contents)
   #+END_SRC

* Show eldoc when evaluating expressions

  Thanks to [[http://endlessparentheses.com/sweet-new-features-in-24-4.html][this post]] it was brought to my attention that eldoc mode
  can be enabled when evaluating expressions using {{{key(M-:)}}}.

  I vaguely remember having had this before, I just don't know how or
  why it stopped working.

  #+BEGIN_SRC emacs-lisp
    (add-hook 'eval-expression-minibuffer-setup-hook #'eldoc-mode)
  #+END_SRC

* Remove whitespace when closing delimiters

  In =electric-pair-mode=, skip over and delete white space if it stands
  between the cursor and the closing delimiter.

  #+BEGIN_SRC emacs-lisp
    (setq electric-pair-skip-whitespace 'chomp)
  #+END_SRC

* Reject SSL/TLS certificates that don't check out

  You just can't trust the internet. And I'd prefer to know if
  something goes wrong.

  #+BEGIN_SRC emacs-lisp
    (defvar gnutls-verify-error)

    (setq gnutls-verify-error t)
  #+END_SRC

* Programming

  Emacs is a real programmer's editor, especially so because it's so
  programmable itself. It also offers modes for a lot of programming
  languages and 3rd-party packages offer even more.

** SCSS

   - Enable auto-completion

     #+BEGIN_SRC emacs-lisp
       (declare-function auto-complete-mode "auto-complete")

       (add-hook 'scss-mode-hook #'auto-complete-mode)
     #+END_SRC

   - Enable imenu

     #+BEGIN_SRC emacs-lisp
       (declare-function scss-imenu-setup "scss-imenu")

       (add-hook 'scss-mode-hook #'scss-imenu-setup)
     #+END_SRC

** PHP

*** Show tabs and spaces in indent

    I'm working with some WordPress plugins nowadays and their style
    guide insists on using tabs, not spaces... I'd like to know that
    I'm following this rule.

    #+BEGIN_SRC emacs-lisp
      (add-hook 'php-mode-hook #'oni:whitespace-only-tabs)
    #+END_SRC

*** Use web-mode for HTML-heavy files

    I have to work with a lot of PHP and HTML interspersed. This makes
    a difficult case since ~php-mode~ very deliberately doesn't support
    that very well. On the other hand I really don't like ~web-mode~ for
    PHP /without/ any HTML in it. So I decided to name the files that
    contain mostly HTML with some PHP ~.html.php~ and have them load
    ~web-mode~ instead of ~php-mode~, whilst keeping the association for
    plain ~.php~ files as it is.

    Something tricky about doing this is that if this setting gets
    evaluated /before/ ~php-mode~ is loaded it'll be further down the list
    from ~php-mode~'s definition. This would cause the ~php-mode~ auto
    mode definition from being accepted first (since ~.html.php~ also
    matches ~.php~) and consequently render this definition useless.

    #+BEGIN_SRC emacs-lisp
      (oni:eval-after-init
        (add-to-list 'auto-mode-alist '("\\.html\\.php$" . web-mode)))
    #+END_SRC

** Web

   ~web-mode~ has some quirks, such as not being able to handle the
   fact that ~fci-mode~ puts a red line at the 80-column margin. This is
   annoying to say the least.

   #+BEGIN_SRC emacs-lisp
     (declare-function fci-mode "fci-mode")
     (add-hook 'web-mode-hook (turn-off fci-mode))
   #+END_SRC

   Just like in ~php-mode~ I want to see the tabs.

   #+BEGIN_SRC emacs-lisp
     (add-hook 'web-mode-hook #'oni:whitespace-only-tabs)
   #+END_SRC

   Set =indent-tabs-mode= for ~web-mode~ as well.

   #+BEGIN_SRC emacs-lisp
     (defvar web-mode-code-indent-offset)
     (defvar web-mode-markup-indent-offset)

     (add-hook 'web-mode-hook
               (change-settings indent-tabs-mode t
                                web-mode-code-indent-offset 4
                                web-mode-markup-indent-offset 4))
   #+END_SRC

   Use it for ~.html.erb~ files.

   #+BEGIN_SRC emacs-lisp
     (oni:eval-after-init
       (add-to-list 'auto-mode-alist '("\\.html\\.erb$" . web-mode)))
   #+END_SRC

** PO mode

   Autoload =po-mode=, because it didn't come with an autloads file or
   cookie.

   #+BEGIN_SRC emacs-lisp
     (autoload 'po-mode "po-mode" nil t)
   #+END_SRC

   Automatically enable =po-mode= for files that end in =.po= or that have
   a =.po= extension followed by others (such as =.po.erb=).

   #+BEGIN_SRC emacs-lisp
     (add-to-list 'auto-mode-alist '("\\.po\\'\\|\\.po\\." . po-mode))
   #+END_SRC

* Minor modes

  Emacs offers a lot of minor modes and even more can be found in the
  ELPA, MELPA and Marmalade repositories. These offer a lot of
  customization possibilities and added features.

** Electric indent

   Automatically indenting code upon typing certain characters can be
   very useful for certain modes where the indentation level can
   easily be determined. One of the first things I liked about Emacs
   was the way the {{{key(TAB)}}} key worked: It indents to the
   "proper" level of indentation, instead of adding a tab character.
   It quickly grew into a habit to press tab several times when
   editing a line or a block of code. Electric indent is just an
   extension of this that, for the most part, allows me to forget
   about pressing tab.

   It doesn't fit all modes though. When I worked in Python a lot I
   was fighting the electric indent a lot more than it was helping me.
   This is because instead of scope influencing indentation as in most
   languages I've worked with, indentation determines scope in Python,
   as anyone who's looked at it for more than a minute or two will
   know. This means that any line can usually have several "proper"
   indentation levels, depending on the meaning of meaning of that
   line.

   So, almost all modes use =electric-indent-local-mode=, but a few
   don't. So I'm also very happy that recently this mode was added,
   because =electric-indent-mode= is a global minor mode and I only want
   to use it in some 99% of the available modes.

   #+BEGIN_SRC emacs-lisp
     (add-hook 'css-mode-hook #'electric-indent-local-mode)
     (add-hook 'js2-mode-hook #'electric-indent-local-mode)
     (add-hook 'php-mode-hook #'electric-indent-local-mode)
     (add-hook 'ruby-mode-hook #'electric-indent-local-mode)
     (add-hook 'scss-mode-hook #'electric-indent-local-mode)
   #+END_SRC

*** Switch keys back

    When =electric-indent-mode= is enabled the default function bound to
    {{{key(C-j)}}} (=electric-newline-and-maybe-indent=) stops indenting
    after adding a newline, whilst {{{key(RET)}}} starts doing it.
    Since I use {{{key(C-j)}}} almost exclusively and don't use
    {{{key(RET)}}} at all, it's really not useful to me. So I want to
    switch the two when =electric-indent-mode= is enabled.

    This is very simple. First I define a simple function that checks
    if the =electric-indent-mode= variable is set (which it should be if
    the mode is turned on) and if so I set the proper keys /locally/. If
    =electric-indent-mode= is /not/ set, which happens when the mode is
    turned off, I remove the local keybindings.

    #+BEGIN_SRC emacs-lisp
      (defun oni:switch-newline-keys ()
        "Switch the `C-j' and `RET' keys in the local buffer."
        (if electric-indent-mode
            (progn
              (local-set-key (kbd "C-j") 'newline)
              (local-set-key (kbd "RET") 'electric-newline-and-maybe-indent))
          (local-unset-key (kbd "C-j"))
          (local-unset-key (kbd "RET"))))
    #+END_SRC

    And then I add it to the electric indent mode's hook.

    #+BEGIN_SRC emacs-lisp
      (add-hook 'electric-indent-local-mode-hook #'oni:switch-newline-keys)
    #+END_SRC

** Electric pairing

   Electric pairing of delimiters is one of those features that is
   just so essential to my feeling comfortable with an editor. Most of
   the time I don't even use it, really. It's just that I'm so used to
   having it and when I /do/ expect it to be there it is so frustrating
   when it's not, or when it doesn't work properly.

   This functionality, much like [[Electric indent]] isn't something I
   want enabled in all modes, though for different reasons, and for a
   time there was only the global =electric-pair-mode=. Again I'm very
   happy that a local version was added.

   The reason that I don't want it enabled for all modes is that some
   modes (mostly Lisp-like language modes) have better alternatives.
   But most non-Lisp-like language modes I really do need to have it.

   #+BEGIN_SRC emacs-lisp
     (add-hook 'c-mode-hook #'electric-pair-local-mode)
     (add-hook 'coffee-mode-hook #'electric-pair-local-mode)
     (add-hook 'css-mode-hook #'electric-pair-local-mode)
     (add-hook 'haml-mode-hook #'electric-pair-local-mode)
     (add-hook 'java-mode-hook #'electric-pair-local-mode)
     (add-hook 'js2-mode-hook #'electric-pair-local-mode)
     (add-hook 'lua-mode-hook #'electric-pair-local-mode)
     (add-hook 'python-mode-hook #'electric-pair-local-mode)
     (add-hook 'ruby-mode-hook #'electric-pair-local-mode)
     (add-hook 'scss-mode-hook #'electric-pair-local-mode)
   #+END_SRC

** Auto completion

   #+BEGIN_SRC emacs-lisp :tangle no
     (depends-on "auto-complete")
   #+END_SRC

   I'm not a great fan of any type of auto completion functionality in
   programming. I think it's basically only good for getting really
   long names in your file faster. I started programming in C#, in
   Visual Studio, and they have their very powerful Intellisense
   mechanism, which I used a lot. What I noticed though was that it
   was keeping me from learning the APIs. Whenever I wrote some code,
   all but the most basic and most-used calls I wrote from memory.
   Many others were done after a few seconds of browsing through the
   Intellisense pop-up.

   Because of this, I disable the normal auto-complete pop-up.

   #+NAME: auto-complete-dont-show
   #+BEGIN_SRC emacs-lisp :tangle no
     (setq ac-auto-show-menu nil)
   #+END_SRC

   On the rare occasion that I do call up the pop-up to see what the
   completions I have available to me are, I don't want it to show the
   quick help. The quick help usually shows up as a big extra pop-up
   next to the completion list and it gets very messy when combined
   with some other modes that add overlays to the buffer.

   #+NAME: auto-complete-no-quickhelp
   #+BEGIN_SRC emacs-lisp :tangle no
     (setq ac-use-quick-help nil)
   #+END_SRC

   To keep the byte-compiler from complaining about undefined
   variables, I only want this to be done after =auto-complete= is
   loaded, not sooner.

   #+BEGIN_SRC emacs-lisp :noweb yes
     (stante-after auto-complete
       <<auto-complete-dont-show>>
       <<auto-complete-no-quickhelp>>)
   #+END_SRC

** Highlight indentation

   #+BEGIN_SRC emacs-lisp :tangle no
     (depends-on "hl-indent")
   #+END_SRC

   Some languages base their ideas of scope on levels of indentation.
   When these languages get long functions/branches it can get tricky
   to see where these blocks end. Of course if you have such large
   functions you might have other problems, but this is sometimes out
   of your hands. To help, I use =hl-indent-mode=.

   For other languages it might look fun for a little while as well,
   but since they don't care about indentation as much it can
   sometimes get messy.

   First, =hl-indent-mode= doesn't have an =;;;###autoload= cookie for its
   main entry-point, so I add it manually:

   #+BEGIN_SRC emacs-lisp
     (autoload 'hl-indent-mode "hl-indent" nil t)
   #+END_SRC

   Then I enable it for the languages I want.

   #+BEGIN_SRC emacs-lisp
     (add-hook 'python-mode-hook #'hl-indent-mode)
     (add-hook 'yaml-mode-hook #'hl-indent-mode)
     (add-hook 'haml-mode-hook #'hl-indent-mode)
   #+END_SRC

** Django helper
   :PROPERTIES:
   :ORDERED:  t
   :END:

   #+BEGIN_SRC emacs-lisp :tangle no
     (depends-on "pony-mode")
   #+END_SRC

   Autoload =pony-mode= because it doesn't come with an autoload cookie.

   #+BEGIN_SRC emacs-lisp
     (autoload 'pony-mode "pony-mode" nil t)
   #+END_SRC

   Turn on =compilation-shell-minor-mode= when =pony-mode= is enabled.

   #+BEGIN_SRC emacs-lisp
     (defun oni:turn-on-compilation-shell-for-pony ()
       "Turn on option `compilation-shell-minor-mode' for `pony-minor-mode'."
       (add-hook 'pony-minor-mode-hook 'compilation-shell-minor-mode nil t))

     (add-hook 'comint-mode-hook #'oni:turn-on-compilation-shell-for-pony)
   #+END_SRC

** Automatic syntax checking on-the-fly

   #+BEGIN_SRC emacs-lisp :tangle no
     (depends-on "flycheck")
     (depends-on "flycheck-cask")
     (depends-on "flycheck-commit-check" :git "git://github.com/ryuslash/flycheck-commit-check.git")
   #+END_SRC

   Flycheck provides awesome syntax checkers for many languages.
   Enable it for the languages I use.

   #+BEGIN_SRC emacs-lisp
     (add-hook 'haml-mode-hook 'flycheck-mode)
     (add-hook 'emacs-lisp-mode-hook 'flycheck-mode)
     (add-hook 'git-commit-mode-hook 'flycheck-mode)
     (add-hook 'go-mode-hook 'flycheck-mode)
     (add-hook 'html-mode-hook 'flycheck-mode)
     (add-hook 'js2-mode-hook 'flycheck-mode)
     (add-hook 'lua-mode-hook 'flycheck-mode)
     (add-hook 'perl-mode-hook 'flycheck-mode)
     (add-hook 'php-mode-hook 'flycheck-mode)
     (add-hook 'python-mode-hook 'flycheck-mode)
     (add-hook 'rst-mode-hook 'flycheck-mode)
     (add-hook 'ruby-mode-hook 'flycheck-mode)
     (add-hook 'rust-mode-hook 'flycheck-mode)
     (add-hook 'sh-mode-hook 'flycheck-mode)
     (add-hook 'texinfo-mode-hook 'flycheck-mode)
   #+END_SRC

   Whenever flycheck is started, try using it with Cask.

   #+BEGIN_SRC emacs-lisp
     (add-hook 'flycheck-mode-hook 'flycheck-cask-setup)
   #+END_SRC

   Load my own git commit checker.

   #+NAME: flycheck-commit-checker
   #+BEGIN_SRC emacs-lisp :tangle no
     (require 'flycheck-commit-check)
   #+END_SRC

   Disable certain checkers.

   #+NAME: flycheck-delete-checkers
   #+BEGIN_SRC emacs-lisp :tangle no
     (mapc (lambda (c) (delq c flycheck-checkers))
           '(python-pylint python-pyflakes))
   #+END_SRC

   Set the highlighting mode to columns so I can see (if possible)
   where errors/warnings belong.

   #+NAME: flycheck-columns
   #+BEGIN_SRC emacs-lisp :tangle no
     (setq flycheck-highlighting-mode 'columns)
   #+END_SRC

   Try not to display the errors. A jumpy echo area makes me nervous
   and {{{key(C-c ! l)}}} is a nicer way to look at it usually. It
   still doesn't keep it from being displayed, only when nothing else
   is displayed though.

   #+NAME: flycheck-display
   #+BEGIN_SRC emacs-lisp :tangle no
     (setq flycheck-display-errors-function (lambda (_) nil))
   #+END_SRC

   Do most of these things after flycheck is loaded.

   #+BEGIN_SRC emacs-lisp :noweb yes
     (stante-after flycheck
       <<flycheck-commit-checker>>
       <<flycheck-delete-checkers>>
       <<flycheck-columns>>
       <<flycheck-display>>)
   #+END_SRC

* Use Conkeror to browse URLs

  Use the generic browse-url function to open URLs in Conkeror.

  #+BEGIN_SRC emacs-lisp
    (stante-after browse-url
      (setq browse-url-browser-function 'browse-url-generic)
      (setq browse-url-generic-program "conkeror"))
  #+END_SRC

* Magit

  Recently Magit gained the annoying habit of producing a /huge/ warning
  message whenever you don't tell it that you've already seen it. To
  tell it you've already seen the message you need to specify the
  following.

  #+BEGIN_SRC emacs-lisp
    (eval-and-compile
      (defvar magit-last-seen-setup-instructions "1.4.0"))
  #+END_SRC

  I use a =defvar= here in order to keep the byte-compiler from
  complaining about an undefined variable. It needs to be specified
  before magit is loaded otherwise magit will keep complaining.

** Project directory

   I keep all my projects in =~/projects/=, so Magit shouldn't have to
   look anywhere else.

   #+NAME: magit-repo-dirs
   #+BEGIN_SRC emacs-lisp :tangle no
     (setq magit-repo-dirs '("~/projects/"))
   #+END_SRC

** Show fine differences

   I like to see all the little differences in diffs that I can. They
   really help reading diffs. I also just want to see them on all
   diffs and not the selected one, which would make an unnecessary
   amount of navigation required to properly read the diffs.

   #+NAME: magit-diff-refine-hunk
   #+BEGIN_SRC emacs-lisp :tangle no
     (setq magit-diff-refine-hunk 'all)
   #+END_SRC

** Don't revert all the buffers

   I'd never noticed it much before, but lately magit's habit of
   reverting all the buffers after almost every action I perform has
   become disturbingly slow. I personally don't rely on that
   functionality being either off or on, so turning it off shouldn't
   bother me too much.

   #+NAME: magit-auto-revert-mode
   #+BEGIN_SRC emacs-lisp :tangle no
     (setq magit-auto-revert-mode nil)
   #+END_SRC

** Delay setting

   The settings in the previous sections should only be set after
   Magit has loaded.

  #+BEGIN_SRC emacs-lisp :noweb yes
    (stante-after magit
      <<magit-repo-dirs>>
      <<magit-diff-refine-hunk>>
      <<magit-auto-revert-mode>>)
  #+END_SRC

* Load custom file

  I don't really use the Emacs customization interface much, but I
  have used it as a kind-of persistent datastore, specifically for
  desktop-registry[fn:9]. I do very much like the idea of it, it's a
  very cool thing to have. I also use ~custom.el~ for storing some
  things that I really can't store in a public viewing location like
  this file or the git repository it lives in.

  #+BEGIN_SRC emacs-lisp
    (setq custom-file "~/.emacs.d/custom.el")
    (load custom-file)
  #+END_SRC

* Notes

  Here are some random or somewhat general notes about things you may
  run into when looking through my Emacs init.

** Vacuous defvar

   A =defvar= without a value like =(defvar some-variable)= tells the
   byte-compiler that the variable will appear, but doesn't give it a
   value. It should only count for the file where it is used and once
   the file with the /actual/ =defvar= is loaded it will be populated with
   its value, contrary to what would happen if you'd given it a value
   before loading its original file.

** Function declarations

   The function =declare-function= tells the byte-compiler where to find
   a certain function. This keeps the byte-compiler from complaining
   about certain functions possibly not being defined at run-time.

* Footnotes

[fn:1] This runs =tmm-menubar=, which lets you navigate the menubar in a
  text-driven way. I don't ever use it because I know what all my
  favorite functions are called, but it seems a great deal more
  efficient than having to click on everything.

[fn:2] https://github.com/sabof/svg-mode-line-themes

[fn:3] It works fine for me with something like jabber chats and the
  like.

[fn:4] I like to program in Lisp, parentheses are important to me!
  Parentheses should be nice and round, not almost like bars!

[fn:5] https://github.com/belluzj/fantasque-sans

[fn:6] Used to be Cosmic Sans Neue Mono, the name changed because
  people misread it as "Comic" (me included, which was the original
  reason I checked it out, for laughs) and hate Comic Sans, and also
  because there was already a Cosmic Sans font as well, which could
  cause confusion.

[fn:7] http://stackoverflow.com/questions/22175214/automatically-switch-language-in-gnus-depending-on-recipient

[fn:8] I still use 2 spaces for some languages, like HTML.

[fn:9] http://code.ryuslash.org/desktop-registry/about/