if default_environment_variables.any? or required_environment_variables.any?

= view_marker 
= render(:environment_variables_default)

if required_environment_variables.any?
  required_environment_variables.each do |env_var|
    > if [[ -z "${<%= env_var.name.upcase %>:-}" ]]; then
    >   printf "{{ strings[:missing_required_environment_variable] % { var: env_var.name.upcase } }}\n" >&2
    >   exit 1
    > fi
  end
end

end