Lisp GFlags is a Common Lisp implementation of gflags, Google's command line
flag parsing library. The library implements functionality similar to that of
Google's C++ and Python gflags libraries, which live here:
The code allows you to define command line flags using the DEFINE-FLAG macro.
For instance, the following form defines a boolean flag called *DEBUG-FLAG*
that is set based on the presence of "--debug" in the application's command
:help "Turn on debugging mode?"
:documentation "Is debugging mode turned on?")
If the command line contains "--debug" or "--debug=true", then *DEBUG-FLAG* is
set to T. Otherwise, it defaults to NIL.
The function PARSE-COMMAND-LINE is used to parse the command line and initialize
flags. It returns the original command line with all recognized flags removed.
The file flag_test.lisp contains many examples.