78 lines
3.0 KiB
Scheme
78 lines
3.0 KiB
Scheme
;;; Gash -- Guile As SHell
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;;; Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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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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;;; Commentary:
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;;; Code:
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(define-module (gash commands basename)
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#:use-module (ice-9 getopt-long)
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#:use-module (ice-9 receive)
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#:use-module (gash config)
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#:export (
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basename
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))
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(define (basename . args)
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(let* ((option-spec
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'((multiple (single-char #\a))
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(help (single-char #\h))
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(version (single-char #\V))
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(suffix (single-char #\s) (value #t))
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(zero (single-char #\z))))
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(options (getopt-long args option-spec))
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(help? (option-ref options 'help #f))
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(version? (option-ref options 'version #f))
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(suffix (option-ref options 'suffix #f))
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(mutliple? (or suffix (option-ref options 'multiple #f)))
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(zero? (option-ref options 'zero #f))
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(files (option-ref options '() '()))
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(usage? (and (not help?) (null? files))))
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(cond (version? (format #t "basename (GASH) ~a\n" %version) (exit 0))
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((or help? usage?) (format (if usage? (current-error-port) #t)
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"\
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Usage: basename NAME [SUFFIX]
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or: basename OPTION... NAME...
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Options:
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-a, --multiple support multiple arguments and treat each as a NAME
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--help display this help and exit
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-s, --suffix=SUFFIX remove a trailing SUFFIX; implies -a
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--version output version information and exit
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-z, --zero end each output line with NUL, not newline
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")
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(exit (if usage? 2 0)))
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(else
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(receive (files suffix)
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(if suffix (values files suffix)
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(values (list-head files 1) (and (pair? (cdr files)) (cadr files))))
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(for-each (lambda (file)
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(let ((file
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(if (and (> (string-length file) 1)
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(string-suffix? "/" file)) (string-drop-right file 1)
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file)))
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(cond ((string=? file "/") (display "/"))
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(suffix (display ((@ (guile) basename) file suffix)))
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(else (display ((@ (guile) basename) file)))))
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(if zero? (display #\nul) (newline)))
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files))))))
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(define main basename)
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