Vbox Snapshot looper

vsnap.zsh

#autoload

vsnap() {
  trap "exit 1" INT
  if [[ $#@ -ne 2 ]] ; then
    echo 'usage: vsnap VM_NAME SNAPSHOT_DIR'
    return 1
  fi
  lastsnap="0"
  mkdir -p $2
  while true ; do
    F=$(mktemp /tmp/vsnap.XXXXXX)
    bundle exec vagrant basebox screenshot $1 $F
    cursnap=$(md5 -q $F)
    if [ "$cursnap" = "$lastsnap" ] ; then
      echo 'skipping identical snap'
      rm -f $F
    else
      lastsnap=$cursnap
      mv $F $2/vsnap-$(date +%s)-$((counter++)).png
      rm -f $F
    fi
  done
}