pbopy: copy over ssh to a MacOS host's clipboard

pbcopy

#!/bin/bash

set -Eeuf -o pipefail

readonly SSH_PORT=1234
readonly USERNAME=me
readonly SSH_KEY=/home/"${USERNAME}"/.ssh/my_key_id_rsa
readonly DEST=my_machine_name

main() {
  # https://stackoverflow.com/questions/20046804/can-i-test-for-an-open-stdin-stream-from-within-a-bash-script
  if [[ -t 0 ]]; then
    # No stdin available
    tmux save-buffer - | pbcopy
  else
    # stdin available
    # https://stackoverflow.com/questions/12524308/bash-strip-trailing-linebreak-from-output
    cat | sed --null-data '$ s/\n$//' | ssh -T -p "${SSH_PORT}" -4 -i "${SSH_KEY}" "${USERNAME}@$(tailscale ip -4 "${DEST}")"
  fi
}
main "$@"