Cross platfrom package manager
Search and install rust binaires
*Update all local packages*
`rustman`
*Search and install interactively a specific pacakge*
`rustman $package`
*install a pacakge*
`rustman -S $package`
*remove a pacakge*
`rustman -R $package`
*show installed pacakges*
`rustman --installed`
`rustman repl`