Set/unset per directory environment variables for development projects

.bashenv

SHOPIFY_CLIENT_ID "123456789"

.bashrc

# Manage ENV files
ENV=.bashenv

function process_old_env()
{
    FILE="$OLDPWD/$ENV"

    if [ -e "$FILE" ]
    then
        while read _name _value
        do
            if [ -n "$_name" ]
            then
                unset "${_name^^}"
            fi
        done < "$FILE"
    fi
}

function process_new_env()
{
    FILE="$PWD/$ENV"

    if [ -e "$FILE" ]
    then
        while read _name _value
        do
            if [ -n "$_name" ]
            then
                export "${_name^^}"="$_value"
            fi
        done < "$ENV"
    fi
}

cd()
{
    if builtin cd "$@"
    then
        process_old_env
        process_new_env
        return 0
    else
        return $?
    fi
}

cd .