org-modeでclock-inしているタスクをMacのメニューバーに表示する ref: http://qiita.com/tamanugi/items/ef43056d5c9709e4f7ab

file0.txt

$ brew cask install bitbar

file1.txt

{任意の名前}.{更新間隔}.{拡張子}

file3.txt

  (defvar clockin-task-file "~/.clockin_task")
  (defun write-clockin-task-file ()
    (with-temp-buffer
      (insert (concat (format-time-string "%s" org-clock-start-time)
                      "\t"
                      org-clock-heading))
      (write-region (point-min) (point-max) clockin-task-file))
    )

  (defun delete-clockin-task-file ()
    (delete-file clockin-task-file))

  (add-hook 'org-clock-in-hook 'write-clockin-task-file)
  (add-hook 'org-clock-out-hook 'delete-clockin-task-file)
  (add-hook 'org-clock-cancel-hook 'delete-clockin-task-file)

org_clockin_task_bitbar_plugin.5s.sh

#!/bin/bash

if [ -e ~/.clockin_task ]; then
  task_name=`cat ~/.clockin_task | cut -f 2`
  start_time=`cat ~/.clockin_task | cut -f 1`

  elapsed=$(expr `date +%s` - $start_time)

  h=$(expr $elapsed / 3600)
  m=$(expr $elapsed % 3600 / 60)

  disph=`printf %02d $h`
  dispm=`printf %02d $m`

  echo ":hourglass_flowing_sand: [$disph:$dispm] $task_name"

else
  echo ":coffee: Break Time"
fi