hook.sh

#!/bin/sh
if test "$(git diff --name-only HEAD@{1} | ack '500|404|home.html|static-content')"
then
 echo "running ./manage.py generatemedia to update files"
 python myproject/manage.py generatemedia --nodebug
 git add -A myproject/_generated_media/*
 git add -A static-content/*
 git commit -m "updating media (automatic update by git merge hook)"
fi