93 lines
3.2 KiB
Scheme
93 lines
3.2 KiB
Scheme
;;; The Geesh Shell Interpreter
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;;; Copyright 2018 Timothy Sample <samplet@ngyro.com>
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;;;
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;;; This file is part of Geesh.
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;;;
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;;; Geesh is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation, either version 3 of the License, or
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;;; (at your option) any later version.
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;;;
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;;; Geesh is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Geesh. If not, see <http://www.gnu.org/licenses/>.
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(define-module (geesh built-ins set)
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#:use-module (geesh environment)
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#:use-module (ice-9 match))
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;;; Commentary:
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;;;
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;;; The 'set' utility.
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;;;
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;;; Code:
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(define (option? o)
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(memq o *option-names*))
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(define (option-letter? chr)
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(assoc chr *option-letters*))
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(define (set-option! option value args)
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(setopt! option value)
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(unless (null? args)
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(set-program-arguments (cons (car (program-arguments)) args))))
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(define (main . args)
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(match args
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(("-o")
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(for-each (lambda (option)
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(format #t "~a\t~a~%"
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option (getopt option)))
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*option-names*)
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EXIT_SUCCESS)
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(("+o")
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(for-each (lambda (option)
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(format #t "set ~a ~a~%"
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(if (getopt option) "-o" "+o") option))
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*option-names*)
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EXIT_SUCCESS)
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(_ (let loop ((args args))
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(match args
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(() EXIT_SUCCESS)
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(("--" . args)
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(set-program-arguments (cons (car (program-arguments)) args))
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EXIT_SUCCESS)
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(("-o" option-string . args)
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(let ((option (string->symbol option-string)))
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(match option
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((? option?)
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(setopt! option #t)
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(loop args))
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(_ (format (current-error-port)
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"~a: set: invalid option ~a~%"
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(car (program-arguments)) option)
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EXIT_FAILURE))))
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(("+o" option-string . args)
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(let ((option (string->symbol option-string)))
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(match option
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((? option?)
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(setopt! option #f)
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(loop args))
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(_ (format (current-error-port)
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"~a: set: invalid option ~a~%"
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(car (program-arguments)) option)
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EXIT_FAILURE))))
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((op . args)
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(match (string->list op)
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((#\- (? option-letter? chr))
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(setopt! (assoc-ref *option-letters* chr) #t)
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(loop args))
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((#\+ (? option-letter? chr))
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(setopt! (assoc-ref *option-letters* chr) #f)
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(loop args))
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(_ (loop (cons* "--" op args)))))
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(_ (format (current-error-port)
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"~a: set: invalid options ~s~%"
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(car (program-arguments)) args)
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EXIT_FAILURE))))))
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