Send region to the clipboard via the xterm clipboard integration (PASTE64/OSC52)

send-region-to-clipboard.el

(defun send-region-to-clipboard (START END)
  ;; Place https://github.com/skaji/remote-pbcopy-iterm2/blob/master/pbcopy as `cpbcopy`
  (interactive "r")
  (let ((infile (make-temp-file "send-region-to-clipboard")))
    (write-region (buffer-substring (region-beginning) (region-end))
                  nil
                  infile
                  nil
                  'nomsg)
    (with-temp-buffer
      (call-process "cpbcopy" infile t)
      (send-string-to-terminal (buffer-substring-no-properties
                                (point-min) (point-max))))
    (delete-file infile)))