-h --help Print this message
--doc --man --manual Display complete manual (in w3m)
--leave-nailed Leave the nailed Cargo.toml in place
+ --linkfarm[=no|shallow|git|full] (default varies, usually "no")
--just-linkfarm | --clean-linkfarm | --keep-linkfarm (default is keep)
--[no-]preclean-linkfarm[=no|src|full] (default is no)
--just-run Run the command, don't do cargo stuff