Rmate style remote editing with Emacs

rmacs.el

(make-network-process :name "rmacs"
		      :server t
		      :host 'local
		      :service 52699
		      :filter #'(lambda (proc string)
				  (delete-process proc)
				  (raise-frame)
				  (let ((tramp-allow-unsafe-temporary-files t))
				    (find-file (string-trim string)))))
;; (delete-process "rmacs")

ssh.sh

ssh -R 52699:127.0.0.1:52699 user@host # or with RemoteForward directive

# in remote shell or with sshrc
e() {
  local HOST="$(echo "$SSH_CONNECTION" | awk '{ print $3 }')"
  while [ -n "$1" ]; do
    local file="/sshx:$USER@$HOST:$(realpath "$1")"
    bash -c "echo $file > /dev/tcp/127.0.0.1/52699"
    shift
  done
}

# edit a file via local emacs, no server needed!
e path/to/file