chore(emacs): Move emacs config to tools/emacs

tools/emacs/init/term-setup.el

@@ -0,0 +1,37 @@
+;; Utilities for Alacritty buffers.
+
+(defun open-or-create-alacritty-buffer (buffer-name)
+  "Switch to the buffer with BUFFER-NAME or create a
+  new buffer running Alacritty."
+  (let ((buffer (get-buffer buffer-name)))
+    (if (not buffer)
+        (run-external-command "alacritty")
+      (switch-to-buffer buffer))))
+
+(defun is-alacritty-buffer (buffer)
+  "Determine whether BUFFER runs Alacritty."
+  (and (equal 'exwm-mode (buffer-local-value 'major-mode buffer))
+       (s-starts-with? "Alacritty" (buffer-name buffer))))
+
+(defun counsel-switch-to-alacritty ()
+  "Switch to a (multi-)term buffer or create one."
+  (interactive)
+  (let ((terms (-map #'buffer-name
+                     (-filter #'is-alacritty-buffer (buffer-list)))))
+    (if terms
+        (ivy-read "Switch to Alacritty buffer: "
+                  (cons "New terminal" terms)
+                  :caller 'counsel-switch-to-alacritty
+                  :require-match t
+                  :action #'open-or-create-alacritty-buffer)
+      (run-external-command "alacritty"))))
+
+(defun alacritty-rename ()
+  "Rename the current terminal buffer."
+  (interactive)
+  (let* ((buffer (get-buffer (buffer-name))))
+    (if (is-alacritty-buffer buffer)
+        (rename-buffer (format "Alacritty<%s>" (read-string "New terminal name: ")))
+      (error "This function is only intended to rename Alacritty buffers."))))
+
+(provide 'term-setup)