CLI

Include options for logging

Defaults to true, override to false when mixing in to firrtl.options.Shell for use in a firrtl.options.Phase

The AnnotationSeq generated from command line arguments

This requires lazy evaluation as subclasses will mixin new command line options via methods of Shell.parser

This method can be overriden to do some work everytime before parsing runs, e.g., to add options to the parser.

Command line argument parser (OptionParser) with modifications