chore(tazjin/emacs): Move //tools/emacs to //users/tazjin/emacs r/1025

Change-Id: I9dfbd0bb1fd3e215bb91c5734fb0934ee3faeae6

14 files changed, 1447 insertions, 1 deletions

diff --git a/users/tazjin/emacs/.gitignore b/users/tazjin/emacs/.gitignore
new file mode 100644
index 000000000000..7b666905f847
--- /dev/null
+++ b/users/tazjin/emacs/.gitignore
@@ -0,0 +1,11 @@
+.smex-items
+*token*
+auto-save-list/
+clones/
+elpa/
+irc.el
+local.el
+other/
+scripts/
+themes/
+*.elc
diff --git a/users/tazjin/emacs/README.md b/users/tazjin/emacs/README.md
new file mode 100644
index 000000000000..5c667333962e
--- /dev/null
+++ b/users/tazjin/emacs/README.md
@@ -0,0 +1,7 @@
+tools/emacs
+===========
+
+This sub-folder builds my Emacs configuration, supplying packages from
+Nix and configuration from this folder.
+
+I use Emacs for many things (including as my desktop environment).
diff --git a/users/tazjin/emacs/config/bindings.el b/users/tazjin/emacs/config/bindings.el
new file mode 100644
index 000000000000..f66a6ab551c1
--- /dev/null
+++ b/users/tazjin/emacs/config/bindings.el
@@ -0,0 +1,54 @@
+;; Font size
+(define-key global-map (kbd "C-=") 'increase-default-text-scale) ;; '=' because there lies '+'
+(define-key global-map (kbd "C--") 'decrease-default-text-scale)
+(define-key global-map (kbd "C-x C-0") 'set-default-text-scale)
+
+;; What does <tab> do? Well, it depends ...
+(define-key prog-mode-map (kbd "<tab>") #'company-indent-or-complete-common)
+
+;; imenu instead of insert-file
+(global-set-key (kbd "C-x i") 'imenu)
+
+;; Window switching. (C-x o goes to the next window)
+(windmove-default-keybindings) ;; Shift+direction
+
+;; Start eshell or switch to it if it's active.
+(global-set-key (kbd "C-x m") 'eshell)
+
+;; Start a new eshell even if one is active.
+(global-set-key (kbd "C-x C-p") 'ivy-browse-repositories)
+(global-set-key (kbd "M-g M-g") 'goto-line-with-feedback)
+
+;; Miscellaneous editing commands
+(global-set-key (kbd "C-c w") 'whitespace-cleanup)
+(global-set-key (kbd "C-c a") 'align-regexp)
+(global-set-key (kbd "C-c m") 'mc/mark-dwim)
+
+;; Browse URLs (very useful for Gitlab's SSH output!)
+(global-set-key (kbd "C-c b p") 'browse-url-at-point)
+(global-set-key (kbd "C-c b b") 'browse-url)
+
+;; C-x REALLY QUIT (idea by @magnars)
+(global-set-key (kbd "C-x r q") 'save-buffers-kill-terminal)
+(global-set-key (kbd "C-x C-c") 'ignore)
+
+;; Open Fefes Blog
+(global-set-key (kbd "C-c C-f") 'fefes-blog)
+
+;; Open a file in project:
+(global-set-key (kbd "C-c f") 'project-find-file)
+
+;; Insert TODO comments
+(global-set-key (kbd "C-c t") 'insert-todo-comment)
+
+;; Add subthread collapsing to notmuch-show.
+;;
+;; C-, closes a thread, C-. opens a thread. This mirrors stepping
+;; in/out of definitions.
+(define-key notmuch-show-mode-map (kbd "C-,") 'notmuch-show-open-or-close-subthread)
+(define-key notmuch-show-mode-map (kbd "C-.")
+  (lambda ()
+    (interactive)
+    (notmuch-show-open-or-close-subthread t))) ;; open
+
+(provide 'bindings)
diff --git a/users/tazjin/emacs/config/custom.el b/users/tazjin/emacs/config/custom.el
new file mode 100644
index 000000000000..a157c7a5fa37
--- /dev/null
+++ b/users/tazjin/emacs/config/custom.el
@@ -0,0 +1,52 @@
+(custom-set-variables
+ ;; custom-set-variables was added by Custom.
+ ;; If you edit it by hand, you could mess it up, so be careful.
+ ;; Your init file should contain only one such instance.
+ ;; If there is more than one, they won't work right.
+ '(ac-auto-show-menu 0.8)
+ '(ac-delay 0.2)
+ '(avy-background t)
+ '(cargo-process--custom-path-to-bin "env CARGO_INCREMENTAL=1 cargo")
+ '(cargo-process--enable-rust-backtrace 1)
+ '(company-auto-complete (quote (quote company-explicit-action-p)))
+ '(company-idle-delay 0.5)
+ '(custom-enabled-themes (quote (gruber-darker)))
+ '(custom-safe-themes
+   (quote
+    ("d61fc0e6409f0c2a22e97162d7d151dee9e192a90fa623f8d6a071dbf49229c6" "3c83b3676d796422704082049fc38b6966bcad960f896669dfc21a7a37a748fa" "89336ca71dae5068c165d932418a368a394848c3b8881b2f96807405d8c6b5b6" default)))
+ '(display-time-default-load-average nil)
+ '(display-time-interval 30)
+ '(elnode-send-file-program "/run/current-system/sw/bin/cat")
+ '(frame-brackground-mode (quote dark))
+ '(global-auto-complete-mode t)
+ '(kubernetes-commands-display-buffer-function (quote display-buffer))
+ '(lsp-gopls-server-path "/home/tazjin/go/bin/gopls")
+ '(magit-log-show-gpg-status t)
+ '(ns-alternate-modifier (quote none))
+ '(ns-command-modifier (quote control))
+ '(ns-right-command-modifier (quote meta))
+ '(require-final-newline (quote visit-save))
+ '(tls-program (quote ("gnutls-cli --x509cafile %t -p %p %h"))))
+(custom-set-faces
+ ;; custom-set-faces was added by Custom.
+ ;; If you edit it by hand, you could mess it up, so be careful.
+ ;; Your init file should contain only one such instance.
+ ;; If there is more than one, they won't work right.
+ '(default ((t (:foreground "#e4e4ef" :background "#181818"))))
+ '(rainbow-delimiters-depth-1-face ((t (:foreground "#2aa198"))))
+ '(rainbow-delimiters-depth-2-face ((t (:foreground "#b58900"))))
+ '(rainbow-delimiters-depth-3-face ((t (:foreground "#268bd2"))))
+ '(rainbow-delimiters-depth-4-face ((t (:foreground "#dc322f"))))
+ '(rainbow-delimiters-depth-5-face ((t (:foreground "#859900"))))
+ '(rainbow-delimiters-depth-6-face ((t (:foreground "#268bd2"))))
+ '(rainbow-delimiters-depth-7-face ((t (:foreground "#cb4b16"))))
+ '(rainbow-delimiters-depth-8-face ((t (:foreground "#d33682"))))
+ '(rainbow-delimiters-depth-9-face ((t (:foreground "#839496"))))
+ '(term-color-black ((t (:background "#282828" :foreground "#282828"))))
+ '(term-color-blue ((t (:background "#96a6c8" :foreground "#96a6c8"))))
+ '(term-color-cyan ((t (:background "#1fad83" :foreground "#1fad83"))))
+ '(term-color-green ((t (:background "#73c936" :foreground "#73c936"))))
+ '(term-color-magenta ((t (:background "#9e95c7" :foreground "#9e95c7"))))
+ '(term-color-red ((t (:background "#f43841" :foreground "#f43841"))))
+ '(term-color-white ((t (:background "#f5f5f5" :foreground "#f5f5f5"))))
+ '(term-color-yellow ((t (:background "#ffdd33" :foreground "#ffdd33")))))
diff --git a/users/tazjin/emacs/config/desktop.el b/users/tazjin/emacs/config/desktop.el
new file mode 100644
index 000000000000..b5915233cd51
--- /dev/null
+++ b/users/tazjin/emacs/config/desktop.el
@@ -0,0 +1,249 @@
+;; -*- lexical-binding: t; -*-
+;;
+;; Configure desktop environment settings, including both
+;; window-management (EXWM) as well as additional system-wide
+;; commands.
+
+(require 's)
+(require 'f)
+(require 'dash)
+(require 'exwm)
+(require 'exwm-config)
+(require 'exwm-randr)
+(require 'exwm-systemtray)
+
+(defun pactl (cmd)
+  (shell-command (concat "pactl " cmd))
+  (message "Volume command: %s" cmd))
+
+(defun volume-mute () (interactive) (pactl "set-sink-mute @DEFAULT_SINK@ toggle"))
+(defun volume-up () (interactive) (pactl "set-sink-volume @DEFAULT_SINK@ +5%"))
+(defun volume-down () (interactive) (pactl "set-sink-volume @DEFAULT_SINK@ -5%"))
+
+(defun brightness-up ()
+  (interactive)
+  (shell-command "xbacklight -inc 5")
+  (message "Brightness increased"))
+
+(defun brightness-down ()
+  (interactive)
+  (shell-command "xbacklight -dec 5")
+  (message "Brightness decreased"))
+
+(defun lock-screen ()
+  (interactive)
+  ;; A sudoers configuration is in place that lets me execute this
+  ;; particular command without having to enter a password.
+  ;;
+  ;; The reason for things being set up this way is that I want
+  ;; xsecurelock.service to be started as a system-wide service that
+  ;; is tied to suspend.target.
+  (shell-command "/usr/bin/sudo /usr/bin/systemctl start xsecurelock.service"))
+
+(defun set-xkb-layout (layout)
+  "Set the current X keyboard layout."
+
+  (shell-command (format "setxkbmap %s" layout))
+  (message "Set X11 keyboard layout to '%s'" layout))
+
+(defun create-window-name ()
+  "Construct window names to be used for EXWM buffers by
+  inspecting the window's X11 class and title.
+
+  A lot of commonly used applications either create titles that
+  are too long by default, or in the case of web
+  applications (such as Cider) end up being constructed in
+  awkward ways.
+
+  To avoid this issue, some rewrite rules are applied for more
+  human-accessible titles."
+
+  (pcase (list (or exwm-class-name "unknown") (or exwm-title "unknown"))
+    ;; In Cider windows, rename the class and keep the workspace/file
+    ;; as the title.
+    (`("Google-chrome" ,(and (pred (lambda (title) (s-ends-with? " - Cider" title))) title))
+     (format "Cider<%s>" (s-chop-suffix " - Cider" title)))
+
+    ;; Attempt to detect IRCCloud windows via their title, which is a
+    ;; combination of the channel name and network.
+    ;;
+    ;; This is what would often be referred to as a "hack". The regexp
+    ;; will not work if a network connection buffer is selected in
+    ;; IRCCloud, but since the title contains no other indication that
+    ;; we're dealing with an IRCCloud window
+    (`("Google-chrome"
+       ,(and (pred (lambda (title)
+                     (s-matches? "^[\*\+]\s#[a-zA-Z0-9/\-]+\s\|\s[a-zA-Z\.]+$" title)))
+             title))
+     (format "IRCCloud<%s>" title))
+
+    ;; For other Chrome windows, make the title shorter.
+    (`("Google-chrome" ,title)
+     (format "Chrome<%s>" (s-truncate 42 (s-chop-suffix " - Google Chrome" title))))
+
+    ;; Gnome-terminal -> Term
+    (`("Gnome-terminal" ,title)
+     ;; fish-shell buffers contain some unnecessary whitespace and
+     ;; such before the current working directory. This can be
+     ;; stripped since most of my terminals are fish shells anyways.
+     (format "Term<%s>" (s-trim-left (s-chop-prefix "fish" title))))
+
+    ;; For any other application, a name is constructed from the
+    ;; window's class and name.
+    (`(,class ,title) (format "%s<%s>" class (s-truncate 12 title)))))
+
+;; EXWM launch configuration
+;;
+;; This used to use use-package, but when something breaks use-package
+;; it doesn't exactly make debugging any easier.
+
+(let ((titlef (lambda ()
+                (exwm-workspace-rename-buffer (create-window-name)))))
+  (add-hook 'exwm-update-class-hook titlef)
+  (add-hook 'exwm-update-title-hook titlef))
+
+(fringe-mode 3)
+(exwm-enable)
+
+;; 's-N': Switch to certain workspace
+(setq exwm-workspace-number 10)
+(dotimes (i 10)
+  (exwm-input-set-key (kbd (format "s-%d" i))
+                      `(lambda ()
+                         (interactive)
+                         (exwm-workspace-switch-create ,i))))
+
+;; Launch applications / any command  with completion (dmenu style!)
+(exwm-input-set-key (kbd "s-d") #'counsel-linux-app)
+(exwm-input-set-key (kbd "s-x") #'ivy-run-external-command)
+(exwm-input-set-key (kbd "s-p") #'ivy-password-store)
+
+;; Add X11 terminal selector to a key
+(exwm-input-set-key (kbd "C-x t") #'ts/switch-to-terminal)
+
+;; Toggle between line-mode / char-mode
+(exwm-input-set-key (kbd "C-c C-t C-t") #'exwm-input-toggle-keyboard)
+
+;; Volume keys
+(exwm-input-set-key (kbd "<XF86AudioMute>") #'volume-mute)
+(exwm-input-set-key (kbd "<XF86AudioRaiseVolume>") #'volume-up)
+(exwm-input-set-key (kbd "<XF86AudioLowerVolume>") #'volume-down)
+
+;; Brightness keys
+(exwm-input-set-key (kbd "<XF86MonBrightnessDown>") #'brightness-down)
+(exwm-input-set-key (kbd "<XF86MonBrightnessUp>") #'brightness-up)
+(exwm-input-set-key (kbd "<XF86Display>") #'lock-screen)
+
+;; Shortcuts for switching between keyboard layouts
+(defmacro bind-xkb (lang key)
+  `(exwm-input-set-key (kbd (format "s-%s" ,key))
+                       (lambda ()
+                         (interactive)
+                         (set-xkb-layout ,lang))))
+
+(bind-xkb "us" "k u")
+(bind-xkb "de" "k d")
+(bind-xkb "no" "k n")
+(bind-xkb "ru" "k r")
+
+;; These are commented out because Emacs no longer starts (??) if
+;; they're set at launch.
+;;
+;; (bind-xkb "us" "л г")
+;; (bind-xkb "de" "л в")
+;; (bind-xkb "no" "л т")
+;; (bind-xkb "ru" "л к")
+
+;; Line-editing shortcuts
+(exwm-input-set-simulation-keys
+ '(([?\C-d] . delete)
+   ([?\C-w] . ?\C-c)))
+
+;; Show time & battery status in the mode line
+(display-time-mode)
+(display-battery-mode)
+
+;; enable display of X11 system tray within Emacs
+(exwm-systemtray-enable)
+
+;; Configure xrandr (multi-monitor setup).
+;;
+;; This makes some assumptions about how my machines are connected to
+;; my home setup during the COVID19 isolation period.
+
+(defun set-randr-config (screens)
+  (setq exwm-randr-workspace-monitor-plist
+        (-flatten (-map (lambda (screen)
+                          (-map (lambda (screen-id) (list screen-id (car screen))) (cdr screen)))
+                        screens))))
+
+;; Layouts for Vauxhall (laptop)
+
+(defun randr-vauxhall-layout-single ()
+  "Laptop screen only!"
+  (interactive)
+  (set-randr-config '(("eDP1" (number-sequence 0 9))))
+  (shell-command "xrandr --output eDP1 --auto --primary")
+  (shell-command "xrandr --output HDMI1 --off")
+  (shell-command "xrandr --output DP2 --off")
+  (exwm-randr-refresh))
+
+(defun randr-vauxhall-layout-all ()
+  "Use all screens at home."
+  (interactive)
+  (set-randr-config
+   '(("eDP1" 0)
+     ("HDMI1" 1 2 3 4 5)
+     ("DP2" 6 7 8 9)))
+
+  (shell-command "xrandr --output HDMI1 --right-of eDP1 --auto --primary")
+  (shell-command "xrandr --output DP2 --right-of HDMI1 --auto")
+  (exwm-randr-refresh))
+
+(defun randr-vauxhall-layout-wide-only ()
+  "Use only the wide screen at home."
+  (interactive)
+  (set-randr-config
+   '(("eDP1" 8 9 0)
+     ("HDMI1" 1 2 4 5 6 7)))
+
+  (shell-command "xrandr --output DP2 --off")
+  (shell-command "xrandr --output HDMI1 --right-of eDP1 --auto --primary")
+  (exwm-randr-refresh))
+
+;; Layouts for frog (desktop)
+
+(defun randr-frog-layout-right-only ()
+  "Use only the right screen on frog."
+  (interactive)
+  (set-randr-config `(("DP-1" ,(number-sequence 0 9))))
+  (shell-command "xrandr --output DP-2 --off")
+  (shell-command "xrandr --output DP-1 --auto --primary"))
+
+(defun randr-frog-layout-both ()
+  "Use the left and right screen on frog."
+  (interactive)
+  (set-randr-config `(("DP-2" 1 2 3 4 5)
+                      ("DP-1" 6 7 8 9 0)))
+
+  (shell-command "xrandr --output DP-2 --auto --primary --left-of DP-1")
+  (shell-command "xrandr --output DP-1 --auto --right-of DP-2"))
+
+(pcase (s-trim (shell-command-to-string "hostname"))
+  ("vauxhall"
+   (exwm-input-set-key (kbd "s-m s") #'randr-vauxhall-layout-single)
+   (exwm-input-set-key (kbd "s-m a") #'randr-vauxhall-layout-all)
+   (exwm-input-set-key (kbd "s-m w") #'randr-vauxhall-layout-wide-only))
+
+  ("frog"
+   (exwm-input-set-key (kbd "s-m b") #'randr-frog-layout-both)
+   (exwm-input-set-key (kbd "s-m r") #'randr-frog-layout-right-only)))
+
+(exwm-randr-enable)
+
+;; Let buffers move seamlessly between workspaces by making them
+;; accessible in selectors on all frames.
+(setq exwm-workspace-show-all-buffers t)
+(setq exwm-layout-show-all-buffers t)
+
+(provide 'desktop)
diff --git a/users/tazjin/emacs/config/eshell-setup.el b/users/tazjin/emacs/config/eshell-setup.el
new file mode 100644
index 000000000000..0b23c5a2d1bc
--- /dev/null
+++ b/users/tazjin/emacs/config/eshell-setup.el
@@ -0,0 +1,68 @@
+;; EShell configuration
+
+(require 'eshell)
+
+;; Generic settings
+;; Hide banner message ...
+(setq eshell-banner-message "")
+
+;; Prompt configuration
+(defun clean-pwd (path)
+  "Turns a path of the form /foo/bar/baz into /f/b/baz
+   (inspired by fish shell)"
+  (let* ((hpath (replace-regexp-in-string home-dir
+                                          "~"
+                                          path))
+         (current-dir (split-string hpath "/"))
+	 (cdir (last current-dir))
+	 (head (butlast current-dir)))
+    (concat (mapconcat (lambda (s)
+			 (if (string= "" s) nil
+			   (substring s 0 1)))
+		       head
+		       "/")
+	    (if head "/" nil)
+	    (car cdir))))
+
+(defun vcprompt (&optional args)
+  "Call the external vcprompt command with optional arguments.
+   VCPrompt"
+  (replace-regexp-in-string
+   "\n" ""
+   (shell-command-to-string (concat  "vcprompt" args))))
+
+(defmacro with-face (str &rest properties)
+  `(propertize ,str 'face (list ,@properties)))
+
+(defun prompt-f ()
+  "EShell prompt displaying VC info and such"
+  (concat
+   (with-face (concat (clean-pwd (eshell/pwd)) " ") :foreground  "#96a6c8")
+   (if (= 0 (user-uid))
+       (with-face "#" :foreground "#f43841")
+     (with-face "$" :foreground "#73c936"))
+   (with-face " " :foreground "#95a99f")))
+
+
+(setq eshell-prompt-function 'prompt-f)
+(setq eshell-highlight-prompt nil)
+(setq eshell-prompt-regexp "^.+? \\((\\(git\\|svn\\|hg\\|darcs\\|cvs\\|bzr\\):.+?) \\)?[$#] ")
+
+;; Ignore version control folders in autocompletion
+(setq eshell-cmpl-cycle-completions nil
+      eshell-save-history-on-exit t
+      eshell-cmpl-dir-ignore "\\`\\(\\.\\.?\\|CVS\\|\\.svn\\|\\.git\\)/\\'")
+
+;; Load some EShell extensions
+(eval-after-load 'esh-opt
+  '(progn
+     (require 'em-term)
+     (require 'em-cmpl)
+     ;; More visual commands!
+     (add-to-list 'eshell-visual-commands "ssh")
+     (add-to-list 'eshell-visual-commands "tail")
+     (add-to-list 'eshell-visual-commands "sl")))
+
+(setq eshell-directory-name "~/.config/eshell/")
+
+(provide 'eshell-setup)
diff --git a/users/tazjin/emacs/config/functions.el b/users/tazjin/emacs/config/functions.el
new file mode 100644
index 000000000000..907dbe5e1176
--- /dev/null
+++ b/users/tazjin/emacs/config/functions.el
@@ -0,0 +1,287 @@
+(require 'chart)
+(require 'dash)
+(require 'map)
+
+(defun load-file-if-exists (filename)
+  (if (file-exists-p filename)
+      (load filename)))
+
+(defun goto-line-with-feedback ()
+  "Show line numbers temporarily, while prompting for the line number input"
+  (interactive)
+  (unwind-protect
+      (progn
+        (setq-local display-line-numbers t)
+        (let ((target (read-number "Goto line: ")))
+          (avy-push-mark)
+          (goto-line target)))
+    (setq-local display-line-numbers nil)))
+
+;; These come from the emacs starter kit
+
+(defun esk-add-watchwords ()
+  (font-lock-add-keywords
+   nil '(("\\<\\(FIX\\(ME\\)?\\|TODO\\|DEBUG\\|HACK\\|REFACTOR\\|NOCOMMIT\\)"
+          1 font-lock-warning-face t))))
+
+(defun esk-sudo-edit (&optional arg)
+  (interactive "p")
+  (if (or arg (not buffer-file-name))
+      (find-file (concat "/sudo:root@localhost:" (read-file-name "File: ")))
+    (find-alternate-file (concat "/sudo:root@localhost:" buffer-file-name))))
+
+;; Open Fefes blog
+(defun fefes-blog ()
+  (interactive)
+  (eww "https://blog.fefe.de/"))
+
+;; Open the NixOS man page
+(defun nixos-man ()
+  (interactive)
+  (man "configuration.nix"))
+
+;; Open my monorepo in magit
+(defun depot-status ()
+  (interactive)
+  (magit-status depot-path))
+
+;; Get the nix store path for a given derivation.
+;; If the derivation has not been built before, this will trigger a build.
+(defun nix-store-path (derivation)
+  (let ((expr (concat "with import <nixos> {}; " derivation)))
+    (s-chomp (shell-command-to-string (concat "nix-build -E '" expr "'")))))
+
+(defun insert-nix-store-path ()
+  (interactive)
+  (let ((derivation (read-string "Derivation name (in <nixos>): ")))
+    (insert (nix-store-path derivation))))
+
+(defun toggle-force-newline ()
+  "Buffer-local toggle for enforcing final newline on save."
+  (interactive)
+  (setq-local require-final-newline (not require-final-newline))
+  (message "require-final-newline in buffer %s is now %s"
+           (buffer-name)
+           require-final-newline))
+
+;; Helm includes a command to run external applications, which does
+;; not seem to exist in ivy. This implementation uses some of the
+;; logic from Helm to provide similar functionality using ivy.
+(defun list-external-commands ()
+  "Creates a list of all external commands available on $PATH
+  while filtering NixOS wrappers."
+  (cl-loop
+   for dir in (split-string (getenv "PATH") path-separator)
+   when (and (file-exists-p dir) (file-accessible-directory-p dir))
+   for lsdir = (cl-loop for i in (directory-files dir t)
+                        for bn = (file-name-nondirectory i)
+                        when (and (not (s-contains? "-wrapped" i))
+                                  (not (member bn completions))
+                                  (not (file-directory-p i))
+                                  (file-executable-p i))
+                        collect bn)
+   append lsdir into completions
+   finally return (sort completions 'string-lessp)))
+
+(defvar external-command-flag-overrides
+  '(("google-chrome" . "--force-device-scale-factor=1.4"))
+
+  "This setting lets me add additional flags to specific commands
+  that are run interactively via `ivy-run-external-command'.")
+
+(defun run-external-command (cmd)
+  "Execute the specified command and notify the user when it
+  finishes."
+    (let* ((extra-flags (cdr (assoc cmd external-command-flag-overrides)))
+           (cmd (if extra-flags (s-join " " (list cmd extra-flags)) cmd)))
+      (message "Starting %s..." cmd)
+      (set-process-sentinel
+       (start-process-shell-command cmd nil cmd)
+       (lambda (process event)
+         (when (string= event "finished\n")
+           (message "%s process finished." process))))))
+
+(defun ivy-run-external-command ()
+  "Prompts the user with a list of all installed applications and
+  lets them select one to launch."
+
+  (interactive)
+  (let ((external-commands-list (list-external-commands)))
+    (ivy-read "Command:" external-commands-list
+              :require-match t
+              :history 'external-commands-history
+              :action #'run-external-command)))
+
+(defun ivy-password-store (&optional password-store-dir)
+  "Custom version of password-store integration with ivy that
+  actually uses the GPG agent correctly."
+
+  (interactive)
+  (ivy-read "Copy password of entry: "
+            (password-store-list (or password-store-dir (password-store-dir)))
+            :require-match t
+            :keymap ivy-pass-map
+            :action (lambda (entry)
+                      (let ((password (auth-source-pass-get 'secret entry)))
+                        (password-store-clear)
+                        (kill-new password)
+                        (setq password-store-kill-ring-pointer kill-ring-yank-pointer)
+                        (message "Copied %s to the kill ring. Will clear in %s seconds."
+                                 entry (password-store-timeout))
+                        (setq password-store-timeout-timer
+                              (run-at-time (password-store-timeout)
+                                           nil 'password-store-clear))))))
+
+(defun ivy-browse-repositories ()
+  "Select a git repository and open its associated magit buffer."
+
+  (interactive)
+  (ivy-read "Repository: "
+            (magit-list-repos)
+            :require-match t
+            :sort t
+            :action #'magit-status))
+
+(defun bottom-right-window-p ()
+  "Determines whether the last (i.e. bottom-right) window of the
+  active frame is showing the buffer in which this function is
+  executed."
+  (let* ((frame (selected-frame))
+         (right-windows (window-at-side-list frame 'right))
+         (bottom-windows (window-at-side-list frame 'bottom))
+         (last-window (car (seq-intersection right-windows bottom-windows))))
+    (eq (current-buffer) (window-buffer last-window))))
+
+(defhydra mc/mark-more-hydra (:color pink)
+  ("<up>" mmlte--up "Mark previous like this")
+  ("<down>" mc/mmlte--down "Mark next like this")
+  ("<left>" mc/mmlte--left (if (eq mc/mark-more-like-this-extended-direction 'up)
+                               "Skip past the cursor furthest up"
+                             "Remove the cursor furthest down"))
+  ("<right>" mc/mmlte--right (if (eq mc/mark-more-like-this-extended-direction 'up)
+                                 "Remove the cursor furthest up"
+                               "Skip past the cursor furthest down"))
+  ("f" nil "Finish selecting"))
+
+;; Mute the message that mc/mmlte wants to print on its own
+(advice-add 'mc/mmlte--message :around (lambda (&rest args) (ignore)))
+
+(defun mc/mark-dwim (arg)
+  "Select multiple things, but do what I mean."
+
+  (interactive "p")
+  (if (not (region-active-p)) (mc/mark-next-lines arg)
+    (if (< 1 (count-lines (region-beginning)
+                          (region-end)))
+        (mc/edit-lines arg)
+      ;; The following is almost identical to `mc/mark-more-like-this-extended',
+      ;; but uses a hydra (`mc/mark-more-hydra') instead of a transient key map.
+      (mc/mmlte--down)
+      (mc/mark-more-hydra/body))))
+
+(defun memespace-region ()
+  "Make a meme out of it."
+
+  (interactive)
+  (let* ((start (region-beginning))
+         (end (region-end))
+         (memed
+          (message
+           (s-trim-right
+            (apply #'string
+                   (-flatten
+                    (nreverse
+                     (-reduce-from (lambda (acc x)
+                                     (cons (cons x (-repeat (+ 1 (length acc)) 32)) acc))
+                                   '()
+                                   (string-to-list (buffer-substring-no-properties start end))))))))))
+
+    (save-excursion (delete-region start end)
+                    (goto-char start)
+                    (insert memed))))
+
+(defun insert-todo-comment (prefix todo)
+  "Insert a comment at point with something for me to do."
+
+  (interactive "P\nsWhat needs doing? ")
+  (save-excursion
+    (move-end-of-line nil)
+    (insert (format " %s TODO(%s): %s"
+                    (s-trim-right comment-start)
+                    (if prefix (read-string "Who needs to do this? ")
+                      (getenv "USER"))
+                    todo))))
+
+;; Custom text scale adjustment functions that operate on the entire instance
+(defun modify-text-scale (factor)
+  (set-face-attribute 'default nil
+                      :height (+ (* factor 5) (face-attribute 'default :height))))
+
+(defun increase-default-text-scale (prefix)
+  "Increase default text scale in all Emacs frames, or just the
+  current frame if PREFIX is set."
+
+  (interactive "P")
+  (if prefix (text-scale-increase 1)
+    (modify-text-scale 1)))
+
+(defun decrease-default-text-scale (prefix)
+  "Increase default text scale in all Emacs frames, or just the
+  current frame if PREFIX is set."
+
+  (interactive "P")
+  (if prefix (text-scale-decrease 1)
+    (modify-text-scale -1)))
+
+(defun set-default-text-scale (prefix &optional to)
+  "Set the default text scale to the specified value, or the
+  default. Restores current frame's text scale only, if PREFIX is
+  set."
+
+  (interactive "P")
+  (if prefix (text-scale-adjust 0)
+    (set-face-attribute 'default nil :height (or to 120))))
+
+(defun scrot-select ()
+  "Take a screenshot based on a mouse-selection and save it to
+  ~/screenshots."
+  (interactive)
+  (shell-command "scrot '$a_%Y-%m-%d_%s.png' -s -e 'mv $f ~/screenshots/'"))
+
+(defun graph-unread-mails ()
+  "Create a bar chart of unread mails based on notmuch tags.
+  Certain tags are excluded from the overview."
+
+  (interactive)
+  (let ((tag-counts
+         (-keep (-lambda ((name . search))
+                  (let ((count
+                         (string-to-number
+                          (s-trim
+                           (notmuch-command-to-string "count" search "and" "tag:unread")))))
+                    (when (>= count 1) (cons name count))))
+                (notmuch-hello-generate-tag-alist '("unread" "signed" "attachment" "important")))))
+
+    (chart-bar-quickie
+     (if (< (length tag-counts) 6)
+         'vertical 'horizontal)
+     "Unread emails"
+     (-map #'car tag-counts) "Tag:"
+     (-map #'cdr tag-counts) "Count:")))
+
+(defun notmuch-show-open-or-close-subthread (&optional prefix)
+  "Open or close the subthread from (and including) the message at point."
+  (interactive "P")
+  (save-excursion
+    (let ((current-depth (map-elt (notmuch-show-get-message-properties) :depth 0)))
+      (loop do (notmuch-show-message-visible (notmuch-show-get-message-properties) prefix)
+            until (or (not (notmuch-show-goto-message-next))
+                      (= (map-elt (notmuch-show-get-message-properties) :depth) current-depth)))))
+  (force-window-update))
+
+(defun vterm-send-ctrl-x ()
+  "Sends `C-x' to the libvterm."
+  (interactive)
+  (vterm-send-key "x" nil nil t))
+
+(provide 'functions)
diff --git a/users/tazjin/emacs/config/init.el b/users/tazjin/emacs/config/init.el
new file mode 100644
index 000000000000..b5d570df09cb
--- /dev/null
+++ b/users/tazjin/emacs/config/init.el
@@ -0,0 +1,287 @@
+;;; init.el --- Package bootstrapping. -*- lexical-binding: t; -*-
+
+;; Packages are installed via Nix configuration, this file only
+;; initialises the newly loaded packages.
+
+(require 'use-package)
+(require 'seq)
+
+(package-initialize)
+
+;; Initialise all packages installed via Nix.
+;;
+;; TODO: Generate this section in Nix for all packages that do not
+;; require special configuration.
+
+;;
+;; Packages providing generic functionality.
+;;
+
+(use-package ace-window
+  :bind (("C-x o" . ace-window))
+  :config
+  (setq aw-keys '(?f ?j ?d ?k ?s ?l ?a)
+        aw-scope 'frame))
+
+(use-package auth-source-pass :config (auth-source-pass-enable))
+
+(use-package avy
+  :bind (("M-j" . avy-goto-char)
+         ("M-p" . avy-pop-mark)
+         ("M-g g" . avy-goto-line)))
+
+(use-package browse-kill-ring)
+
+(use-package company
+  :hook ((prog-mode . company-mode))
+  :config (setq company-tooltip-align-annotations t))
+
+(use-package counsel
+  :after (ivy)
+  :config (counsel-mode 1)
+  :bind (("C-c r g" . counsel-rg)))
+
+(use-package dash)
+(use-package dash-functional)
+
+(use-package dottime
+  :demand
+  :after (notmuch telega)
+  :config (dottime-display-mode t))
+
+(use-package gruber-darker-theme)
+
+(use-package eglot
+  :custom
+  (eglot-autoshutdown t)
+  (eglot-send-changes-idle-time 0.3))
+
+(use-package ht)
+
+(use-package hydra)
+(use-package idle-highlight-mode :hook ((prog-mode . idle-highlight-mode)))
+
+(use-package ivy
+  :config
+  (ivy-mode 1)
+  (setq enable-recursive-minibuffers t)
+  (setq ivy-use-virtual-buffers t))
+
+(use-package ivy-pass :after (ivy))
+
+(use-package ivy-prescient
+  :after (ivy prescient)
+  :config
+  (ivy-prescient-mode)
+  ;; Fixes an issue with how regexes are passed to ripgrep from counsel,
+  ;; see raxod502/prescient.el#43
+  (setf (alist-get 'counsel-rg ivy-re-builders-alist) #'ivy--regex-plus))
+
+(use-package multiple-cursors)
+
+(use-package notmuch
+  :bind (:map global-map
+              ("s-g m" . notmuch)
+              ("s-g M" . counsel-notmuch)) ;; g m -> gmail
+  :config
+  (setq notmuch-search-oldest-first nil)
+  (setq notmuch-show-all-tags-list t)
+  (setq notmuch-hello-tag-list-make-query "tag:unread"))
+
+(use-package paredit :hook ((lisp-mode . paredit-mode)
+                            (emacs-lisp-mode . paredit-mode)))
+
+(use-package pinentry
+  :config
+  (setq epa-pinentry-mode 'loopback)
+  (pinentry-start))
+
+(use-package prescient
+  :after (ivy counsel)
+  :config (prescient-persist-mode))
+
+(use-package rainbow-delimiters :hook (prog-mode . rainbow-delimiters-mode))
+(use-package rainbow-mode)
+(use-package s)
+(use-package string-edit)
+
+(use-package swiper
+  :after (counsel ivy)
+  :bind (("C-s" . swiper)))
+
+(use-package telephone-line) ;; configuration happens outside of use-package
+(use-package term-switcher)
+(use-package undo-tree :config (global-undo-tree-mode))
+(use-package uuidgen)
+(use-package which-key :config (which-key-mode t))
+
+;;
+;; Applications in emacs
+;;
+
+(use-package magit
+  :bind ("C-c g" . magit-status)
+  :config (setq magit-repository-directories '(("/home/tazjin/projects" . 2)
+                                               ("/home/tazjin" . 1))))
+
+(use-package org-journal
+  ;; Always use my own key to encrypt files. There seems to be no
+  ;; global way to set this, as `epa-file-encrypt-to' only has an
+  ;; effect as a file-local variable (?!)
+  :hook ((org-journal-mode . (lambda ()
+                               (setq-local epa-file-encrypt-to
+                                           "DCF34CFAC1AC44B87E26333136EE34814F6D294A"))))
+
+  :config
+  (setq org-journal-dir "/ssh:camden.tazj.in:/home/tazjin/journal"
+        org-journal-encrypt-journal t
+        org-journal-file-type 'weekly
+        org-journal-date-format "%A, %Y-%m-%d"
+        org-journal-file-format "%Y%m%d-weekly"
+
+        ;; Saturday, because reasons.
+        org-journal-start-on-weekday 6)
+
+  ;; org-journal doesn't actually enter its mode automatically if
+  ;; encryption is used (I'm not sure why), so this teaches Emacs to
+  ;; recognise the files.
+  (add-to-list 'auto-mode-alist '("[0-9]-weekly\\.gpg\\'" . org-journal-mode)))
+
+(use-package org-ql)
+
+(use-package password-store)
+(use-package pg)
+(use-package restclient)
+
+(use-package vterm
+  :config (progn
+            (setq vterm-shell "fish")
+            (setq vterm-exit-functions
+                  (lambda (&rest _) (kill-buffer (current-buffer))))
+            (setq vterm-set-title-functions
+                  (lambda (title)
+                    (rename-buffer
+                     (generate-new-buffer-name
+                      (format "vterm<%s>"
+                              (s-trim-left
+                               (s-chop-prefix "fish" title)))))))))
+
+;;
+;; Packages providing language-specific functionality
+;;
+
+(use-package cargo
+  :hook ((rust-mode . cargo-minor-mode)
+         (cargo-process-mode . visual-line-mode))
+  :bind (:map cargo-minor-mode-map ("C-c C-c C-l" . ignore)))
+
+(use-package dockerfile-mode)
+
+(use-package erlang
+  :hook ((erlang-mode . (lambda ()
+                          ;; Don't indent after '>' while I'm writing
+                          (local-set-key ">" 'self-insert-command)))))
+
+(use-package f)
+(use-package geiser)
+
+(use-package go-mode
+  :bind (:map go-mode-map ("C-c C-r" . recompile))
+  :hook ((go-mode . (lambda ()
+                      (setq tab-width 2)
+                      (setq-local compile-command
+                                  (concat "go build " buffer-file-name))))))
+
+(use-package haskell-mode)
+
+(use-package ielm
+  :hook ((inferior-emacs-lisp-mode . (lambda ()
+                                       (paredit-mode)
+                                       (rainbow-delimiters-mode-enable)
+                                       (company-mode)))))
+
+(use-package jq-mode
+  :config (add-to-list 'auto-mode-alist '("\\.jq\\'" . jq-mode)))
+
+(use-package kotlin-mode
+  :hook ((kotlin-mode . (lambda ()
+                          (setq indent-line-function #'indent-relative)))))
+
+(use-package lsp-mode)
+
+(use-package markdown-mode
+  :config
+  (add-to-list 'auto-mode-alist '("\\.txt\\'" . markdown-mode))
+  (add-to-list 'auto-mode-alist '("\\.markdown\\'" . markdown-mode))
+  (add-to-list 'auto-mode-alist '("\\.md\\'" . markdown-mode)))
+
+(use-package markdown-toc)
+
+(use-package nix-mode
+  :hook ((nix-mode . (lambda ()
+                       (setq indent-line-function #'nix-indent-line)))))
+
+(use-package nix-util)
+(use-package nginx-mode)
+(use-package rust-mode)
+
+(use-package sly
+  :hook ((sly-mrepl-mode . (lambda ()
+                             (paredit-mode)
+                             (rainbow-delimiters-mode-enable)
+                             (company-mode))))
+  :config
+  (setq common-lisp-hyperspec-root "file:///home/tazjin/docs/lisp/"))
+
+(use-package telega
+  :bind (:map global-map ("s-t" . telega))
+  :config (telega-mode-line-mode 1))
+
+(use-package terraform-mode)
+(use-package toml-mode)
+(use-package web-mode)
+(use-package yaml-mode)
+
+(defgroup tazjin nil
+  "Settings related to my configuration")
+
+(defcustom depot-path "/depot"
+  "Local path to the depot checkout"
+  :group 'tazjin)
+
+;; Configuration changes in `customize` can not actually be persisted
+;; to the customise file that Emacs is currently using (since it comes
+;; from the Nix store).
+;;
+;; The way this will work for now is that Emacs will *write*
+;; configuration to the file tracked in my repository, while not
+;; actually *reading* it from there (unless Emacs is rebuilt).
+(setq custom-file (expand-file-name "~/depot/tools/emacs/config/custom.el"))
+(load-library "custom")
+
+(defvar home-dir (expand-file-name "~"))
+
+;; Seed RNG
+(random t)
+
+;; Load all other Emacs configuration. These configurations are
+;; added to `load-path' by Nix.
+(mapc 'require '(desktop
+                 mail-setup
+                 look-and-feel
+                 functions
+                 settings
+                 modes
+                 bindings
+                 eshell-setup))
+(telephone-line-setup)
+(ace-window-display-mode)
+
+;; If a local configuration library exists, it should be loaded.
+;;
+;; This can be provided by calling my Emacs derivation with
+;; `withLocalConfig'.
+(if-let (local-file (locate-library "local"))
+    (load local-file))
+
+(provide 'init)
diff --git a/users/tazjin/emacs/config/look-and-feel.el b/users/tazjin/emacs/config/look-and-feel.el
new file mode 100644
index 000000000000..5a4d874f6f0d
--- /dev/null
+++ b/users/tazjin/emacs/config/look-and-feel.el
@@ -0,0 +1,113 @@
+;;; -*- lexical-binding: t; -*-
+
+;; Hide those ugly tool bars:
+(tool-bar-mode 0)
+(scroll-bar-mode 0)
+(menu-bar-mode 0)
+(add-hook 'after-make-frame-functions
+          (lambda (frame) (scroll-bar-mode 0)))
+
+;; Don't do any annoying things:
+(setq ring-bell-function 'ignore)
+(setq initial-scratch-message "")
+
+;; Remember layout changes
+(winner-mode 1)
+
+;; Usually emacs will run as a proper GUI application, in which case a few
+;; extra settings are nice-to-have:
+(when window-system
+  (setq frame-title-format '(buffer-file-name "%f" ("%b")))
+  (mouse-wheel-mode t)
+  (blink-cursor-mode -1))
+
+;; Configure Emacs fonts.
+(let ((font (format "JetBrains Mono-%d" 12)))
+  (setq default-frame-alist `((font . ,font)))
+  (set-frame-font font t t))
+
+;; Configure telephone-line
+(defun telephone-misc-if-last-window ()
+  "Renders the mode-line-misc-info string for display in the
+  mode-line if the currently active window is the last one in the
+  frame.
+
+  The idea is to not display information like the current time,
+  load, battery levels on all buffers."
+
+  (when (bottom-right-window-p)
+    (telephone-line-raw mode-line-misc-info t)))
+
+(defun telephone-line-setup ()
+  (telephone-line-defsegment telephone-line-last-window-segment ()
+    (telephone-misc-if-last-window))
+
+  ;; Display the current EXWM workspace index in the mode-line
+  (telephone-line-defsegment telephone-line-exwm-workspace-index ()
+    (when (bottom-right-window-p)
+      (format "[%s]" exwm-workspace-current-index)))
+
+  ;; Define a highlight font for ~ important ~ information in the last
+  ;; window.
+  (defface special-highlight '((t (:foreground "white" :background "#5f627f"))) "")
+  (add-to-list 'telephone-line-faces
+               '(highlight . (special-highlight . special-highlight)))
+
+  (setq telephone-line-lhs
+        '((nil . (telephone-line-position-segment))
+          (accent . (telephone-line-buffer-segment))))
+
+  (setq telephone-line-rhs
+        '((accent . (telephone-line-major-mode-segment))
+          (nil . (telephone-line-last-window-segment
+                  telephone-line-exwm-workspace-index))
+
+          ;; TODO(tazjin): lets not do this particular thing while I
+          ;; don't actually run notmuch, there are too many things
+          ;; that have a dependency on the modeline drawing correctly
+          ;; (including randr operations!)
+          ;;
+          ;; (highlight . (telephone-line-notmuch-counts))
+          ))
+
+  (setq telephone-line-primary-left-separator 'telephone-line-tan-left
+        telephone-line-primary-right-separator 'telephone-line-tan-right
+        telephone-line-secondary-left-separator 'telephone-line-tan-hollow-left
+        telephone-line-secondary-right-separator 'telephone-line-tan-hollow-right)
+
+  (telephone-line-mode 1))
+
+;; Auto refresh buffers
+(global-auto-revert-mode 1)
+
+;; Use clipboard properly
+(setq select-enable-clipboard t)
+
+;; Show in-progress chords in minibuffer
+(setq echo-keystrokes 0.1)
+
+;; Show column numbers in all buffers
+(column-number-mode t)
+
+(defalias 'yes-or-no-p 'y-or-n-p)
+(defalias 'auto-tail-revert-mode 'tail-mode)
+
+;; Style line numbers (shown with M-g g)
+(setq linum-format
+      (lambda (line)
+        (propertize
+         (format (concat " %"
+                         (number-to-string
+                          (length (number-to-string
+                                   (line-number-at-pos (point-max)))))
+                         "d ")
+                 line)
+         'face 'linum)))
+
+;; Display tabs as 2 spaces
+(setq tab-width 2)
+
+;; Don't wrap around when moving between buffers
+(setq windmove-wrap-around nil)
+
+(provide 'look-and-feel)
diff --git a/users/tazjin/emacs/config/mail-setup.el b/users/tazjin/emacs/config/mail-setup.el
new file mode 100644
index 000000000000..1167bcadd372
--- /dev/null
+++ b/users/tazjin/emacs/config/mail-setup.el
@@ -0,0 +1,83 @@
+(require 'notmuch)
+(require 'counsel-notmuch)
+
+;; (global-set-key (kbd "C-c m") 'notmuch-hello)
+;; (global-set-key (kbd "C-c C-m") 'counsel-notmuch)
+;; (global-set-key (kbd "C-c C-e n") 'notmuch-mua-new-mail)
+
+(setq notmuch-cache-dir (format "%s/.cache/notmuch" (getenv "HOME")))
+(make-directory notmuch-cache-dir t)
+
+;; Cache addresses for completion:
+(setq notmuch-address-save-filename (concat notmuch-cache-dir "/addresses"))
+
+;; Don't spam my home folder with drafts:
+(setq notmuch-draft-folder "drafts") ;; relative to notmuch database
+
+;; Mark things as read when archiving them:
+(setq notmuch-archive-tags '("-inbox" "-unread" "+archive"))
+
+;; Show me saved searches that I care about:
+(setq notmuch-saved-searches
+      '((:name "inbox" :query "tag:inbox" :count-query "tag:inbox AND tag:unread" :key "i")
+        (:name "sent" :query "tag:sent" :key "t")
+        (:name "drafts" :query "tag:draft")))
+(setq notmuch-show-empty-saved-searches t)
+
+;; Mail sending configuration
+(setq send-mail-function 'sendmail-send-it) ;; sendmail provided by MSMTP
+(setq notmuch-always-prompt-for-sender t)
+(setq notmuch-mua-user-agent-function
+      (lambda () (format "Emacs %s; notmuch.el %s" emacs-version notmuch-emacs-version)))
+(setq mail-host-address (system-name))
+(setq notmuch-mua-cite-function #'message-cite-original-without-signature)
+(setq notmuch-fcc-dirs nil) ;; Gmail does this server-side
+(setq message-signature nil) ;; Insert message signature manually with C-c C-w
+
+;; Close mail buffers after sending mail
+(setq message-kill-buffer-on-exit t)
+
+;; Ensure sender is correctly passed to msmtp
+(setq mail-specify-envelope-from t
+      message-sendmail-envelope-from 'header
+      mail-envelope-from 'header)
+
+;; Store sent mail in the correct folder per account
+(setq notmuch-maildir-use-notmuch-insert nil)
+
+;; I don't use drafts but I instinctively hit C-x C-s constantly, lets
+;; handle that gracefully.
+(define-key notmuch-message-mode-map (kbd "C-x C-s") #'ignore)
+
+;; Define a telephone-line segment for displaying the count of unread,
+;; important mails in the last window's mode-line:
+(defvar *last-notmuch-count-redraw* 0)
+(defvar *current-notmuch-count* nil)
+
+(defun update-display-notmuch-counts ()
+  "Update and render the current state of the notmuch unread
+  count for display in the mode-line.
+
+  The offlineimap-timer runs every 2 minutes, so it does not make
+  sense to refresh this much more often than that."
+
+  (when (> (- (float-time) *last-notmuch-count-redraw*) 30)
+    (setq *last-notmuch-count-redraw* (float-time))
+    (let* ((inbox-unread (notmuch-saved-search-count "tag:inbox and tag:unread"))
+           (notmuch-count (format "I: %s; D: %s" inbox-unread)))
+      (setq *current-notmuch-count* notmuch-count)))
+
+  (when (and (bottom-right-window-p)
+             ;; Only render if the initial update is done and there
+             ;; are unread mails:
+             *current-notmuch-count*
+             (not (equal *current-notmuch-count* "I: 0; D: 0")))
+    *current-notmuch-count*))
+
+(telephone-line-defsegment telephone-line-notmuch-counts ()
+  "This segment displays the count of unread notmuch messages in
+  the last window's mode-line (if unread messages are present)."
+
+  (update-display-notmuch-counts))
+
+(provide 'mail-setup)
diff --git a/users/tazjin/emacs/config/modes.el b/users/tazjin/emacs/config/modes.el
new file mode 100644
index 000000000000..69fb523d0d91
--- /dev/null
+++ b/users/tazjin/emacs/config/modes.el
@@ -0,0 +1,37 @@
+;; Initializes modes I use.
+
+(add-hook 'prog-mode-hook 'esk-add-watchwords)
+(add-hook 'prog-mode-hook 'hl-line-mode)
+
+;; Use auto-complete as completion at point
+(defun set-auto-complete-as-completion-at-point-function ()
+  (setq completion-at-point-functions '(auto-complete)))
+
+(add-hook 'auto-complete-mode-hook
+          'set-auto-complete-as-completion-at-point-function)
+
+;; Enable rainbow-delimiters for all things programming
+(add-hook 'prog-mode-hook 'rainbow-delimiters-mode)
+
+;; Enable Paredit & Company in Emacs Lisp mode
+(add-hook 'emacs-lisp-mode-hook 'company-mode)
+
+;; Always highlight matching brackets
+(show-paren-mode 1)
+
+;; Always auto-close parantheses and other pairs
+(electric-pair-mode)
+
+;; Keep track of recent files
+(recentf-mode)
+
+;; Easily navigate sillycased words
+(global-subword-mode 1)
+
+;; Transparently open compressed files
+(auto-compression-mode t)
+
+;; Configure go-mode for Go2 Alpha
+(add-to-list 'auto-mode-alist '("\\.go2$" . go-mode))
+
+(provide 'modes)
diff --git a/users/tazjin/emacs/config/settings.el b/users/tazjin/emacs/config/settings.el
new file mode 100644
index 000000000000..b895d5e4061e
--- /dev/null
+++ b/users/tazjin/emacs/config/settings.el
@@ -0,0 +1,51 @@
+(require 'uniquify)
+
+;; Move files to trash when deleting
+(setq delete-by-moving-to-trash t)
+
+;; We don't live in the 80s, but we're also not a shitty web app.
+(setq gc-cons-threshold 20000000)
+
+(setq uniquify-buffer-name-style 'forward)
+
+; Fix some defaults
+(setq visible-bell nil
+      inhibit-startup-message t
+      color-theme-is-global t
+      sentence-end-double-space nil
+      shift-select-mode nil
+      uniquify-buffer-name-style 'forward
+      whitespace-style '(face trailing lines-tail tabs)
+      whitespace-line-column 80
+      default-directory "~"
+      fill-column 80
+      ediff-split-window-function 'split-window-horizontally
+      initial-major-mode 'emacs-lisp-mode)
+
+(add-to-list 'safe-local-variable-values '(lexical-binding . t))
+(add-to-list 'safe-local-variable-values '(whitespace-line-column . 80))
+
+(set-default 'indent-tabs-mode nil)
+
+;; UTF-8 please
+(setq locale-coding-system 'utf-8) ; pretty
+(set-terminal-coding-system 'utf-8) ; pretty
+(set-keyboard-coding-system 'utf-8) ; pretty
+(set-selection-coding-system 'utf-8) ; please
+(prefer-coding-system 'utf-8) ; with sugar on top
+
+;; Make emacs behave sanely (overwrite selected text)
+(delete-selection-mode 1)
+
+;; Keep your temporary files in tmp, emacs!
+(setq auto-save-file-name-transforms
+      `((".*" ,temporary-file-directory t)))
+(setq backup-directory-alist
+      `((".*" . ,temporary-file-directory)))
+
+(remove-hook 'kill-buffer-query-functions 'server-kill-buffer-query-function)
+
+;; Show time in 24h format
+(setq display-time-24hr-format t)
+
+(provide 'settings)
diff --git a/users/tazjin/emacs/default.nix b/users/tazjin/emacs/default.nix
new file mode 100644
index 000000000000..5d492853cf70
--- /dev/null
+++ b/users/tazjin/emacs/default.nix
@@ -0,0 +1,147 @@
+# This file builds an Emacs pre-configured with the packages I need
+# and my personal Emacs configuration.
+#
+# On NixOS machines, this Emacs currently does not support
+# Imagemagick, see https://github.com/NixOS/nixpkgs/issues/70631.
+#
+# Forcing Emacs to link against Imagemagick currently causes libvterm
+# to segfault, which is a lot less desirable than not having telega
+# render images correctly.
+{ depot, lib, ... }:
+
+let
+  inherit (depot) third_party;
+
+  emacsWithPackages = (third_party.emacsPackagesGen third_party.emacs26).emacsWithPackages;
+
+  # $PATH for binaries that need to be available to Emacs
+  emacsBinPath = lib.makeBinPath [ third_party.telega ];
+
+  identity = x: x;
+
+  tazjinsEmacs = pkgfun: (emacsWithPackages(epkgs: pkgfun(
+  # Actual ELPA packages (the enlightened!)
+  (with epkgs.elpaPackages; [
+    ace-window
+    avy
+    flymake
+    pinentry
+    rainbow-mode
+    undo-tree
+    xelb
+  ]) ++
+
+  # MELPA packages:
+  (with epkgs.melpaPackages; [
+    ace-link
+    browse-kill-ring
+    cargo
+    clojure-mode
+    cmake-mode
+    counsel
+    counsel-notmuch
+    dash-functional
+    direnv
+    dockerfile-mode
+    eglot
+    elixir-mode
+    elm-mode
+    erlang
+    geiser
+    go-mode
+    gruber-darker-theme
+    haskell-mode
+    ht
+    hydra
+    idle-highlight-mode
+    intero
+    ivy
+    ivy-pass
+    ivy-prescient
+    jq-mode
+    kotlin-mode
+    lispy
+    lsp-mode
+    magit
+    markdown-toc
+    meson-mode
+    multi-term
+    multiple-cursors
+    nginx-mode
+    nix-mode
+    notmuch # this comes from pkgs.third_party
+    org-journal
+    org-ql
+    paredit
+    password-store
+    pg
+    polymode
+    prescient
+    protobuf-mode
+    racket-mode
+    rainbow-delimiters
+    refine
+    request
+    restclient
+    sly
+    string-edit
+    swiper
+    telega
+    telephone-line
+    terraform-mode
+    toml-mode
+    transient
+    use-package
+    uuidgen
+    web-mode
+    websocket
+    which-key
+    yaml-mode
+    yasnippet
+  ]) ++
+
+  # Custom packages
+  (with depot.tools.emacs-pkgs; [
+    dottime
+    nix-util
+    term-switcher
+
+    # patched / overridden versions of packages
+    depot.third_party.emacs.exwm
+    depot.third_party.emacs.rcirc
+    depot.third_party.emacs.vterm
+    depot.third_party.emacs.explain-pause-mode
+  ]))));
+in lib.fix(self: l: f: third_party.writeShellScriptBin "tazjins-emacs" ''
+  export PATH="${emacsBinPath}:$PATH"
+  exec ${tazjinsEmacs f}/bin/emacs \
+    --debug-init \
+    --no-site-file \
+    --no-site-lisp \
+    --no-init-file \
+    --directory ${./config} ${if l != null then "--directory ${l}" else ""} \
+    --eval "(require 'init)" $@
+  '' // {
+    # Call overrideEmacs with a function (pkgs -> pkgs) to modify the
+    # packages that should be included in this Emacs distribution.
+    overrideEmacs = f': self l f';
+
+    # Call withLocalConfig with the path to a *folder* containing a
+    # `local.el` which provides local system configuration.
+    withLocalConfig = confDir: self confDir f;
+
+    # Build a derivation that uses the specified local Emacs (i.e.
+    # built outside of Nix) instead
+    withLocalEmacs = emacsBin: third_party.writeShellScriptBin "tazjins-emacs" ''
+      export PATH="${emacsBinPath}:$PATH"
+      export EMACSLOADPATH="${(tazjinsEmacs f).deps}/share/emacs/site-lisp:"
+      exec ${emacsBin} \
+        --debug-init \
+        --no-site-file \
+        --no-site-lisp \
+        --no-init-file \
+        --directory ${./config} \
+        ${if l != null then "--directory ${l}" else ""} \
+        --eval "(require 'init)" $@
+    '';
+  }) null identity
diff --git a/users/tazjin/nixos/frog/default.nix b/users/tazjin/nixos/frog/default.nix
index 7da724d9cf96..3b99f082f5a9 100644
--- a/users/tazjin/nixos/frog/default.nix
+++ b/users/tazjin/nixos/frog/default.nix
@@ -9,7 +9,7 @@ config: let
 
   # add google-c-style here because other machines get it from, eh,
   # elsewhere.
-  frogEmacs = (depot.tools.emacs.overrideEmacs(epkgs: epkgs ++ [
+  frogEmacs = (depot.users.tazjin.emacs.overrideEmacs(epkgs: epkgs ++ [
     depot.third_party.emacsPackages.google-c-style
   ]));
 in depot.lib.fix(self: {