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;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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.
;;;
;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu gnunet scripts guix-stuff)
#:export (call-with-temporary-output-file
temporary-output-file
(write-file-tree/lazywrap . write-file-tree))
#:autoload (guix serialization) (write-file-tree))
(define (write-file-tree/lazywrap . rest)
(apply write-file-tree rest))
(define (call-with-temporary-output-file proc)
"Call PROC with a name of a temporary file and open output port to that
file; close the file and delete it when leaving the dynamic extent of this
call."
(let* ((directory (or (getenv "TMPDIR") "/tmp"))
(template (string-append directory "/guix-file.XXXXXX"))
(out (mkstemp! template)))
(dynamic-wind
(lambda ()
#t)
(lambda ()
(proc template out))
(lambda ()
(false-if-exception (close out))
(false-if-exception (delete-file template))))))
;; Variant defined in Scheme-GNUnet, that doesn't close the port.
(define (temporary-output-file)
(let* ((directory (or (getenv "TMPDIR") "/tmp"))
(template (string-append directory "/guix-file.XXXXXX"))
(out (mkstemp! template)))
(set-port-filename! out template)
out))
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