graphviz xdot and gist driver

graphviz-gist

#!/bin/bash -ex

# usage: graphviz-gist {filename} [optional description goes here]

# gist-paste is from the ubuntu 'gist' package

github_user=stevegt # XXX

id="$1"
shift
file="$1"
shift
desc="$@"

touch $file
idfn=/tmp/$RANDOM

(
    while true
    do 
        inotifywait -e modify $file
        sleep 1
        kill $xdot || true
        xdot $file &
        xdot=$!

        if [ -z "$id" ]
        then
            gist_url=$(gist-paste --skip-empty -f $file -d "$desc" < $file)
            id=$(echo ${gist_url/*\/})
        else
            gist_url=$(gist-paste -u $id --skip-empty -f $file -d "$desc" < $file)
        fi
        echo $id > $idfn
    done
) >> /tmp/graphviz-gist.log 2>&1 &
loop=$!

vi $file
kill $loop

id=$(cat $idfn)

set +x
echo viewer URL:
echo https://stevegt.github.io/GraphvizOnline/?url=https://gist.githubusercontent.com/$github_user/$id/raw/$file