mirror of git://git.gnupg.org/gnupg.git
50 lines
2.1 KiB
Scheme
50 lines
2.1 KiB
Scheme
;; Common definitions for executing gpg and related tools.
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;;
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;; Copyright (C) 2016, 2017 g10 Code GmbH
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;;
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;; This file is part of GnuPG.
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;;
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;; GnuPG 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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;; GnuPG 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 this program; if not, see <http://www.gnu.org/licenses/>.
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;; Evaluate a sequence of expressions with the given home directory.
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(define-macro (with-home-directory gnupghome . expressions)
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(let ((original-home-directory (gensym)))
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`(let ((,original-home-directory (getenv "GNUPGHOME")))
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(dynamic-wind
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(lambda () (setenv "GNUPGHOME" ,gnupghome #t))
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(lambda () ,@expressions)
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(lambda () (setenv "GNUPGHOME" ,original-home-directory #t))))))
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;; Evaluate a sequence of expressions with an ephemeral home
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;; directory.
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(define-macro (with-ephemeral-home-directory setup-fn teardown-fn . expressions)
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(let ((original-home-directory (gensym))
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(ephemeral-home-directory (gensym))
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(setup (gensym))
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(teardown (gensym)))
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`(let ((,original-home-directory (getenv "GNUPGHOME"))
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(,ephemeral-home-directory (mkdtemp))
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(,setup (delay (,setup-fn)))
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(,teardown (delay (,teardown-fn))))
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(finally (unlink-recursively ,ephemeral-home-directory)
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(dynamic-wind
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(lambda ()
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(setenv "GNUPGHOME" ,ephemeral-home-directory #t)
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(with-working-directory ,ephemeral-home-directory (force ,setup)))
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(lambda () ,@expressions)
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(lambda ()
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(setenv "GNUPGHOME" ,ephemeral-home-directory #t)
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(with-working-directory ,ephemeral-home-directory (force ,teardown))
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(setenv "GNUPGHOME" ,original-home-directory #t)))))))
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