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printf -- " %-9s - %s\n" "--help" "This help screen"
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printf -- " %-9s - %s\n" "--version" "Version details"
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printf -- " %-9s - %s\n" "--verbose" "Display additional messages"
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printf -- " %-9s - %s\n" "--rebuild-vanilla" "Always rebuild vanilla image"
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echo "supported devices:"