Simulate work in a directory adding and updating files

simulate-work.sh

#!/bin/bash

while true; do
  filename=$(((RANDOM %10) + 1))
  if [ -f $filename ]; then
    mkfile 30m data/$filename
  else
    randomstring=$(LC_CTYPE=C tr -dc A-Za-z0-9 < /dev/urandom | fold -w ${1:-$(((RANDOM %1000000) +1))} | head -n 1)
    echo $randomstring >>data/$filename
  fi

  git add data/$filename
  git commit -m "updated $filename"

  sleep 2
done