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;; -*- coding: utf-8; -*-
;; gitto -- Keep track of your git repositories
;; Copyright (C) 2012 Tom Willemse <tom at ryuslash dot org>
;; This file is part of gitto.
;; gitto is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; gitto is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with gitto. If not, see <http://www.gnu.org/licenses/>.
(define-module (gitto command)
#:export (define-command
command?
command-documentation
command-function
for-each-command))
(define-syntax define-command
(syntax-rules ()
((_ (name . args)
usage
longdoc
exp exp* ...)
(begin
(set! command-list
(cons
(list (symbol->string (quote name))
(cons
#:function
(case-lambda*
(args
exp exp* ...)
(lst (format #t "Wrong number of arguments.~%"))))
(cons #:usage usage)
(cons #:documentation longdoc))
command-list))))))
(define command-list '())
(define (command? name)
"Check if NAME corresponds to a command."
(not (null? (assoc-ref command-list name))))
(define (command-documentation command)
"Get the documentation for COMMAND."
(assq-ref (assoc-ref command-list command) #:documentation))
(define (command-function command)
"Get the function for COMMAND."
(assq-ref (assoc-ref command-list command) #:function))
(define (for-each-command function)
"Execute FUNCTION for each known command."
(for-each function command-list))
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