TOX_ENVLIST=`grep envlist tox.ini | cut -d '=' -f 2 | tr ',' ' '`
TESTENVS=`grep testenv tox.ini | awk -F ':' '{print $2}' | tr '[]' ' '`
UNFILTERED_ENVLIST=`echo "$TOX_ENVLIST $TESTENVS"`
ENVLIST=$( awk 'BEGIN{RS=ORS=" "}!a[$0]++' <<<$UNFILTERED_ENVLIST );
for env in $ENVLIST
do
  ENV_PATH=.tox/$env
  PIP_PATH=$ENV_PATH/bin/pip
  echo -e "\nUpdate environment ${env}...\n"
  if [ ! -d $ENV_PATH -o ! -f $PIP_PATH ]
  then
    tox --notest -e$env
  else
    $PIP_PATH install -r requirements.txt -r test-requirements.txt
  fi
done