A bash script to remind you to do pushups during work hours on OS X and Linux

pushups.sh

#!/bin/bash
# pushup.sh
#
# Cron entry, weekdays on the hour from 8am-7pm
# m h  dom mon dow   command
# 0 8-19 * * 1-5 bash pushup.sh

# Minimum number of pushups you want to do
MINUPS=10

# Week of the year (1-52)
WEEK="`date +%V`"

if [[ $(uname) == 'Darwin' ]]; then
  say "drop and give me `expr $MINUPS + $WEEK % 6`"
elif [[ $(uname) == 'Linux' ]]; then
  echo "drop and give me `expr $MINUPS + $WEEK % 6`" | espeak
fi