Some notes about developing plasmoids

List installed plasmoids' names: plasmapkg --list

Install a plasmoid for the current user: plasmapkg --install <path>
Upgrade a plasmoid for the current user: plasmapkg --upgrade <path>
Remove an installed plasmoid: plasmapkg --remove <name>

Run a plasmoid quickly in the viewer: plasmoidviewer <name>|<path>

<name> above refers to plasmoid's name as specified in the metadata.desktop
file. Those names are also printed by the 'plasmapkg --list' command.

<path> above refers to a file system path where a plasmoid file structure
resides.