85 lines
3.2 KiB
Scheme
85 lines
3.2 KiB
Scheme
;;; Gash --- Guile As SHell
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;;; Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;; Copyright © 2019 Timothy Sample <samplet@ngyro.com>
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;;;
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;;; This file is part of Gash.
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;;;
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;;; Gash is free software; you can redistribute it and/or modify it
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;;; 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 (at
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;;; your option) any later version.
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;;;
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;;; Gash is distributed in the hope that it will be useful, but WITHOUT ANY
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;;; WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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;;; FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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;;; 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 Gash. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gash built-ins command)
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#:use-module (ice-9 getopt-long)
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#:use-module (gash built-ins utils)
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#:use-module (gash compat)
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#:use-module (gash config))
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;;; Commentary:
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;;;
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;;; The 'command' utility.
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;;;
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;;; Code:
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(define (PATH-search-path program)
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(search-path (string-split (getenv "PATH") #\:) program))
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(define main
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(case-lambda
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(() #t)
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(args
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(let* ((option-spec
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'((describe (single-char #\V))
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(help)
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(show (single-char #\v))
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(version)))
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(options (getopt-long (cons "command" args) option-spec
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#:stop-at-first-non-option #t))
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(help? (option-ref options 'help #f))
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(version? (option-ref options 'version #f))
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(files (option-ref options '() '())))
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(cond (help? (display "Usage: command [OPTION]... [COMMAND [ARG]...]
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Options:
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--help display this help and exit
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--version display version information and exit
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-v display a description of COMMAND similar to the `type' builtin
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-V display a more verbose description of COMMAND
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"))
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(version? (format #t "command (GASH) ~a\n" %version))
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((null? files) #t)
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((option-ref options 'describe #f)
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(let ((command (car files)))
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(cond ((built-in? command)
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(format #t "~a is a shell builtin\n" command)
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EXIT_SUCCESS)
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((PATH-search-path command)
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=>
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(lambda (program)
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(format #t "~a is ~a\n" command program)
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EXIT_SUCCESS))
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(else EXIT_FAILURE))))
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((option-ref options 'show #f)
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(let ((command (car files)))
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(cond ((built-in? command)
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(format #t "~a\n" command)
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EXIT_SUCCESS)
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((PATH-search-path command)
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=>
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(lambda (program)
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(format #t "~a\n" program)
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EXIT_SUCCESS))
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(else EXIT_FAILURE))))
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(else (let* ((command (car files))
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(built-in? command)
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(args-string (string-join args)))
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((@@ (gash built-ins eval) main) args-string))))))))
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