EDIT

# -- requirements

COMPOSER=$(which composer)

if [[ -z "$COMPOSER" ]]; then

    # try local composer

    if [[ -x ./composer ]]; then

        COMPOSER=./composer

    else

        echo "composer not found. Please see https://github.com/cybertaxonomy/cdm-dataportal#preparation"

        exit -1

    fi

fi

# -- backups before any modification