Mercurial > octave
annotate scripts/miscellaneous/private/tar_is_bsd.m @ 31551:fd29c7a50a78 stable
maint: use commas, semicolons consistently with Octave conventions.
* makeValidName.m: Remove %!test and move BIST %!asserts to column 1.
* base64decode.m, base64encode.m, which.m, logm.m, uniquetol.m, perms.m:
Delete semicolon (';') at end of %!assert BIST.
* lin2mu.m, interp2.m, interpn.m, lsqnonneg.m, pqpnonneg.m, uniquetol.m,
betainc.m, normalize.m: Add semicolon (';') to end of assert statement within
%!test BIST.
* __memoize__.m, tar_is_bsd.m, publish.m: Add semicolon (';') to line with
keyword "persistent".
* stft.m: Use comma (',') after "case" keyword when code immediately follows.
* gallery.m: Align commas used in case statements in massive switch block.
Remove unnecessary parentheses around a numeric case argument.
* ranks.m: Remove semicolon (';') from case statemnt argument.
| author | Rik <rik@octave.org> |
|---|---|
| date | Sat, 26 Nov 2022 06:32:08 -0800 |
| parents | 796f54d4ddbf |
| children | 597f3ee61a48 |
| rev | line source |
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1 ######################################################################## |
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2 ## |
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3 ## Copyright (C) 2019-2022 The Octave Project Developers |
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4 ## |
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5 ## See the file COPYRIGHT.md in the top-level directory of this |
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6 ## distribution or <https://octave.org/copyright/>. |
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7 ## |
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8 ## This file is part of Octave. |
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9 ## |
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10 ## Octave is free software: you can redistribute it and/or modify it |
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11 ## under the terms of the GNU General Public License as published by |
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12 ## the Free Software Foundation, either version 3 of the License, or |
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13 ## (at your option) any later version. |
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14 ## |
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15 ## Octave is distributed in the hope that it will be useful, but |
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16 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 ## GNU General Public License for more details. |
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19 ## |
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20 ## You should have received a copy of the GNU General Public License |
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21 ## along with Octave; see the file COPYING. If not, see |
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22 ## <https://www.gnu.org/licenses/>. |
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23 ## |
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24 ######################################################################## |
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25 |
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26 ## -*- texinfo -*- |
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27 ## @deftypefn {} {@var{out} =} tar_is_bsd () |
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28 ## True if the default tar command is BSD tar. |
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29 ## |
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30 ## Checks whether the default tar command (the one invoked when an un-prefixed |
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31 ## @code{tar} is executed) is BSD tar or another tar. Caches the results for |
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32 ## performance. |
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33 ## |
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34 ## Returns true if the detected tar is BSD tar, and false otherwise. Errors if |
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35 ## @code{tar --version} does not succeed. |
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36 ## @end deftypefn |
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37 |
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38 function out = tar_is_bsd () |
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39 |
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40 ## BSD tar needs to be handled differently from GNU tar |
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41 persistent cache; |
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42 if (isempty (cache)) |
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43 [status, tar_ver_str] = system ("tar --version"); |
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44 if (status) |
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45 error ("tar: Failed executing tar --version (status = %d)", status); |
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46 endif |
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47 cache = ! isempty (regexp (tar_ver_str, "bsdtar")); |
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48 endif |
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49 out = cache; |
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50 |
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51 endfunction |