+ cmd << '-y' if ['upgrade', 'dist-upgrade', 'autoremove'].include?(action)
+ if ['upgrade', 'dist-upgrade'].include?(action)
+ ENV['DEBIAN_FRONTEND'] = 'noninteractive'
+ cmd << '-o'
+ cmd << 'Dpkg::Options="--force-confdef"'
+ cmd << '-o'
+ cmd << 'Dpkg::Options="--force-confold"'
+ end