You may use xdebug_start_trace() and xdebug_stop_trace() XDebug functions to kick off the debugger on demand. Make sure that you've configured XDebug in CLI first (php -i | grep xdebug).

Then create new one-liner PHP file as follows (e.g. drush_xdebug_start.inc):

<?php xdebug_start_trace();

Then run the drush as:

drush --early=drush_xdebug_start.inc whatever_command_you_need

You may use xdebug_start_trace() and xdebug_stop_trace() XDebug functions to kick off the debugger on demand. Make sure that you've configured XDebug in CLI first (php -i | grep xdebug).

Then create new one-liner PHP file as follows (e.g. drush_xdebug_start.inc):

<?php xdebug_start_trace();

Then run the drush as:

drush --early="$PWD"/drush_xdebug_start.inc whatever_command_you_need