Automate heathergraph update from github

crontab

0 0,8,12,16 * * * /home/pi/heathergraph_update.sh > /home/pi/heathergraph_update.log 2>&1

heathergraph_update.sh

#!/bin/bash

GIT='git -C /home/pi/heathergraph/'

$GIT fetch

UPSTREAM=${1:-'@{u}'}
LOCAL=$($GIT rev-parse @)
REMOTE=$($GIT rev-parse "$UPSTREAM")
BASE=$($GIT merge-base @ "$UPSTREAM")

if [ $LOCAL = $REMOTE ]; then
	echo "Git: Up-to-date"
elif [ $LOCAL = $BASE ]; then
	echo "Git: Pulling"
	$GIT stash
	$GIT merge
	$GIT stash pop
	sudo python ./heathergraph/server.py restart
elif [ $REMOTE = $BASE ]; then
	echo "Git: Need to push"
else
	echo "Git: Oh dear"
fi