WIP: Nixify Emacs setup

The things that I dislike about this setup are:
1. `xref-find-definitions` takes me to `/nix/store`, which is a read-only
version of the source code, so I cannot edit it, which doesn't feel lispy.

2. I need to rebuild the derivation when I change something, which also doesn't
feel lispy.

There are ways to circumvent both of these drawbacks, but for now, I'm checking
this in only to later revert it.

configs/shared/.emacs.d/init.el

@@ -1,4 +1,8 @@
 (require 'wpc-package "~/.emacs.d/wpc/packages/wpc-package.el")
+(require 'f)
+(setq user-init-file (or load-file-name (buffer-file-name)))
+(setq user-emacs-directory (f-dirname user-init-file))
+;; TODO: Troubleshoot broken terminator.
 
 ;; load order is intentional
 (require 'constants)
@@ -11,7 +15,7 @@
 (require 'kaomoji)
 
 ;; Google
-(require 'google-stuff)
+;; (require 'google-stuff)
 
 ;; Laptop XF-functionality
 (require 'pulse-audio)
@@ -41,7 +45,7 @@
 (require 'wpc-lisp)
 (require 'wpc-haskell)
 (require 'wpc-reasonml)
-(require 'wpc-ocaml)
+;; (require 'wpc-ocaml)
 (require 'wpc-elixir)
 (require 'wpc-nix)
 (require 'wpc-rust)
@@ -50,3 +54,5 @@
 (require 'wpc-javascript)
 (require 'wpc-java)
 (require 'wpc-prolog)
+
+(run-hooks 'after-init-hook)

configs/shared/.emacs.d/wpc/packages/wpc-misc.el

@@ -13,7 +13,7 @@
 (display-time-mode 1)
 
 ;; disable custom variable entries from being written to ~/.emacs.d/init.el
-(setq custom-file "~/.emacs.d/custom.el")
+(setq custom-file "/tmp/custom.el")
 (load custom-file 'noerror)
 
 ;; integrate Emacs with X11 clipboard

configs/shared/.xsessionrc.shared

@@ -26,7 +26,7 @@ tmux new -d -s main
 
 # Start the Emacs server
 # TODO: Consider starting this with `systemctl --user enable emacs.service`
-emacs --daemon
+# emacs --daemon
 
 # Start ssh-agent
 eval "$(ssh-agent -s)"
@@ -42,4 +42,7 @@ compton &
 unclutter &
 
 # Startup Emacs (and EXWM).
-exec dbus-launch --exit-with-session emacs
+# TODO: Does this prevent the Emacs server (i.e. `emacs --daemon`) from running?
+# NOTE: wpcarros-emacs is built with `nix-env -iA emacs -f .` from
+# `CWD=~/Dropbox/dotfiles`
+exec dbus-launch --exit-with-session wpcarros-emacs