100 lines
4.0 KiB
Scheme
100 lines
4.0 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 chmod)
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#:use-module (ice-9 getopt-long)
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#:use-module (ice-9 match)
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#:use-module (ice-9 receive)
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#:use-module (ice-9 regex)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9 gnu)
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#:use-module (srfi srfi-26)
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#:use-module (gash config)
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#:use-module (gash guix-utils)
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#:use-module (gash shell-utils)
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#:export (
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chmod
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))
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(define (chmod . args)
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(let* ((option-spec
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'((reference (value #t))
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(recursive (single-char #\R))
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(help (single-char #\h))
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(version (single-char #\V))
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(writable (single-char #\w))
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(readable (single-char #\r))
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(executable (single-char #\x))
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(xecutable (single-char #\X))))
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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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(files (option-ref options '() '()))
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(reference (option-ref options 'reference #f))
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(readable? (option-ref options 'readable #f))
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(writable? (option-ref options 'writable #f))
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(executable? (option-ref options 'executable? #f))
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(xecutable? (option-ref options 'xecutable? #f))
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(usage? (and (not help?)
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(< (length files) (if (or reference
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readable?
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writable?
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executable?
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xecutable?) 1 2)))))
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(cond (version? (format #t "chmod (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: chmod [OPTION]... {MODE | --reference=REF_FILE} FILE...
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Change the mode of each FILE to MODE.
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With --reference, change the mode of each FILE to that of RFILE.
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Options:
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--help display this help and exit
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-R, --recursive change files and directories recursively
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--reference=FILE use FILE's mode instead of MODE values
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--version output version information and exit
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Each MODE is of the form '[ugoa]*([-+=]([rwxXst]*|[ugo]))+|[-+=][0-7]+'.
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")
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(exit (if usage? 2 0)))
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(else
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(receive (modifiers files)
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(cond
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(reference (values (list (make-numeric-chmodifier
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(stat:mode (stat reference)))) files))
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((or readable? writable? executable? xecutable?)
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(let* ((m '())
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(m (if readable? (cons (make-chmodifier 'o '- '(r)) m) m))
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(m (if writable? (cons (make-chmodifier 'o '- '(w)) m) m))
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(m (if executable? (cons (make-chmodifier 'o '- '(x)) m) m))
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(m (if xecutable? (cons (make-chmodifier 'o '- '(X)) m) m)))
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(values m files)))
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(else (values (parse-chmodifiers (car files)) (cdr files))))
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(let ((files (if (not (option-ref options 'recursive #f)) files
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(append-map (cut find-files <> #:directories? #t) files))))
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(for-each (cut apply-chmodifiers <> modifiers) (reverse files))))))))
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(define main chmod)
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