Classes

Preprocess commandline arguments.
Map commandline arguments from one value to another during preflight.
Prepare to bootstrap Drupal
The Drush preflight determines what needs to be done for this request.
Storage for arguments preprocessed during preflight.
Helper methods to verify preflight state.
RedispatchToSiteLocal forces an exec to the site-local Drush if it exist. We must do this super-early, before loading Drupal's autoload file. If we do not, we will crash unless the site-local Drush and the global Drush are using the exact same versions of all dependencies, which will rarely line up sufficiently to prevent problems.

Interfaces

Storage for arguments preprocessed during preflight.