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 line.
(define-flag *debug-flag* :default-value nil :selector \"debug\" :type boolean :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.
The file flag.test contains more examples.
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