CLI commands to manage themes from the command-line (work in progress)
composer require yireo/magento2-theme-commands
bin/magento module:enable Yireo_ThemeCommands
Change the current theme to Magento/luma
for all scopes:
bin/magento theme:change Magento/luma
Change the current theme to Hyva/default
for the StoreView with ID 1:
bin/magento theme:change Hyva/default 1 stores