opt

const (
	DeleteSource  OptionType = iota + 1 // Delete source file/object
	IfNotExists                         // Run only if destination does not exist
	Parents                             // Just like cp --parents
	RR                                  // Reduced-redundancy
	IA                                  // Infrequent-access
	Recursive                           // Recursive copy/move (local)
	ListETags                           // Include ETags in listing
	HumanReadable                       // Human Readable file sizes (ls, du)
	GroupByClass                        // Group by storage class (du)
	IfSizeDiffers                       // Run only if size differs (or file non-existent on destination)
	IfSourceNewer                       // Run only if source file is newer
	Help                                // Show help
)

const (
	Unchecked          ParamType = iota // Arbitrary single parameter
	UncheckedOneOrMore                  // One or more arbitrary parameters (special case)
	S3Obj                               // Bucket or bucket + key
	S3Dir                               // Bucket or bucket + key + "/" (prefix)
	S3ObjOrDir                          // Bucket or bucket + key [+ "/"]
	S3SimpleObj                         // Bucket + key
	S3WildObj                           // Bucket + key with wildcard
	FileObj                             // Filename
	Dir                                 // Dir name or non-existing name ("/" appended)
	FileOrDir                           // File or directory (if existing directory, "/" appended)
	Glob                                // String containing a valid glob pattern (non-S3)

	OptionalDir       // Optional dir name or non-existing name ("/" appended)
	OptionalFileOrDir // Optional file or directory (if existing directory, "/" appended)
)