Automagically create a Gist if pasting more than 5 lines.

Hook in as follows:

  (add-hook 'erc-mode-hook
            (lambda () (define-key erc-mode-map [(control ?y)] 'erc-yank)))

Or, if you want to use my `use-package' macro:

  (use-package erc
    :commands erc
    :config
    (use-package erc-yank
      :init
      (bind-key "C-y" 'erc-yank erc-mode-map)))

This module requires https://github.com/defunkt/gist