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srfi-37

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srfi-37
1. Description
2. Author
3. Requirements
4. Documentation
5. Example
6. Changelog
7. License

Description

A simple and flexible command-line option parsing facility.

Author

Anthony Carrico

Requirements

None

Documentation

See the SRFI-37 document.

This extension supports static linking.

Example

#!/usr/local/bin/csi -script
;;;; secho - display command-line arguments

(define nl 1)

(define help 
  (option 
   '(#\h "help") #f #f
   (lambda _ 
     (print "Usage: secho [OPTION] ARG ...
  -h  --help          show this text
  -n  --newline N     add N newline characters (default: 1)")
     (exit) ) ) )

(define newlines
  (option
   '(#\n "newline") #t #f
   (lambda (o n x vals)
     (set! nl (string->number x))
     vals) ) )

(for-each 
 (lambda (x) (print* x #\space))
 (reverse
  (args-fold
   (command-line-arguments)
   (list help newlines)
   (lambda (o n x vals)
     (error "unrecognized option" n) )
   cons
   '() ) ) )

(display (make-string nl #\newline))

Changelog

1.3 - Ported to Chicken 4 [Ivan Raikov]
1.2 - Changed license to the one acually used by the reference implementation [Thanks to Ivan Shmakov for pointing this out]
1.1 - support for static linking
1.0 - Initial release

License

 Copyright (C) Anthony Carrico (2002). All Rights Reserved.

 This document and translations of it may be copied and furnished to
 others, and derivative works that comment on or otherwise explain it
 or assist in its implementation may be prepared, copied, published and
 distributed, in whole or in part, without restriction of any kind,
 provided that the above copyright notice and this paragraph are
 included on all such copies and derivative works. However, this
 document itself may not be modified in any way, such as by removing
 the copyright notice or references to the Scheme Request For
 Implementation process or editors, except as needed for the purpose of
 developing SRFIs in which case the procedures for copyrights defined
 in the SRFI process must be followed, or as required to translate it
 into languages other than English.
 
 The limited permissions granted above are perpetual and will not be
 revoked by the authors or their successors or assigns.
 
 This document and the information contained herein is provided on an
 ``AS IS'' basis and THE AUTHOR AND THE SRFI EDITORS DISCLAIM ALL
 WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
 WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY
 RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
 PARTICULAR PURPOSE.