Periodically converts a dot file into a PNG so that I can create diagrams in a text editor and view them in a web browser and/or "OSX Preview".

updot

#!/bin/bash

if [ $# -ne 1 ]
then
  echo "Usage: `basename $0` {dot file}"
  exit -1
fi

FILE=$1
NAME=${FILE%.dot}
DOT=$NAME.dot
PNG=$NAME.png

echo "View diagram at URL: file://$PNG"

# Open in Preview on OSX - will auto update whenever it has focus
open -g -a "Preview" $PNG

while :;
do
  dot -Tpng -o $PNG $DOT
  sleep 1
done