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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2020.
author John W. Eaton <jwe@octave.org>
date Mon, 06 Jan 2020 22:29:51 -0500
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children bd51beb6205e
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1891570abac8 update Octave Project Developers copyright for the new year
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1 ## Copyright (C) 2019-2020 The Octave Project Developers
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2 ##
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3 ## See the file COPYRIGHT.md in the top-level directory of this distribution
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4 ## or <https://octave.org/COPYRIGHT.html/>.
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5 ##
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6 ##
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7 ## This file is part of Octave.
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8 ##
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9 ## Octave is free software: you can redistribute it and/or modify it
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10 ## under the terms of the GNU General Public License as published by
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11 ## the Free Software Foundation, either version 3 of the License, or
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12 ## (at your option) any later version.
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13 ##
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14 ## Octave is distributed in the hope that it will be useful, but
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15 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 ## GNU General Public License for more details.
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18 ##
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19 ## You should have received a copy of the GNU General Public License
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20 ## along with Octave; see the file COPYING. If not, see
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21 ## <https://www.gnu.org/licenses/>.
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22
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23 ## -*- texinfo -*-
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24 ## @deftypefn {} {@var{out} =} tar_is_bsd ()
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25 ## True if the default tar command is BSD tar.
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26 ##
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27 ## Checks whether the default tar command (the one invoked when an un-prefixed
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28 ## @code{tar} is executed) is BSD tar or another tar. Caches the results for
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29 ## performance.
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30 ##
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31 ## Returns true if the detected tar is BSD tar, and false otherwise. Errors if
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32 ## @code{tar --version} does not succeed.
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33 ## @end deftypefn
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34
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35 function out = tar_is_bsd ()
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36 ## BSD tar needs to be handled differently from GNU tar
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37 persistent cache
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38 if isempty (cache)
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39 [status, tar_ver_str] = system ("tar --version");
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40 if (status)
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41 error ("tar: Failed executing tar --version (status = %d)", status);
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42 endif
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43 cache = ! isempty (regexp (tar_ver_str, "bsdtar"));
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44 endif
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45 out = cache;
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46 endfunction