wclas

Introduction

with-command-line-arguments is an ASDF-installable library providing an extensible macro for processing command line arguments. It includes a pretty --help output showing the current value of variables.

Contact

Email John Fremlin at MSI. His address is jf@[the domain without www].

View or edit the Cliki entry.

Using it

Start Lisp. Get asdf-install.

CL-USER> (asdf-install:install 'wclas)
CL-USER> (asdf:operate 'asdf:load-op 'wclas)

CL-USER> (defun main (&rest args) 
	   (wclas:with-command-line-arguments (args :restvar remaining-arguments) 
				      (tree-name 
				       (pears :var-is-name t :name "p" :arguments (integer)) 
				       (apples :arguments (integer) :value 100) 
				       (nil :name "pick" :description "pick the fruit from the tree" :arguments nil :func (lambda() (format t "PICKING!"))))
				    (values tree-name pears apples remaining-arguments)))
MAIN
CL-USER> (main "--pick" "--apples" "100")
PICKING!
NIL
NIL
100
NIL
CL-USER> (main "--pick" "--apples" "1" "--" "--apples" "10")
PICKING!
NIL
NIL
1
("--apples" "10")
CL-USER> (main "-tree-name" "oak" "-p" "6" "--help")

Command line syntax:

   --eval: READ
         Evaluate a Lisp expression and print the result
   --help: no parameters
         command line usage
   --tree-name: STRING
         tree-name (current value: "oak")
   --pears --p: INTEGER
         pears (current value: 6)
   --apples: INTEGER
         apples (current value: 100)
   --pick: no parameters
         pick the fruit from the tree

The command-line arguments received were: "-tree-name" "oak" "-p" "6" "--help" 

"oak"
6
100
NIL

The API is documented.

Downloads

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