Mercurial > octave
annotate scripts/pkg/private/get_forge_pkg.m @ 29358:0a5b15007766 stable
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2021.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Wed, 10 Feb 2021 09:52:15 -0500 |
| parents | bd51beb6205e |
| children | 7854d5752dd2 d3298a58049e |
| rev | line source |
|---|---|
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1 ######################################################################## |
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2 ## |
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3 ## Copyright (C) 2005-2021 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/>. |
| 10684 | 7 ## |
| 11104 | 8 ## This file is part of Octave. |
| 10684 | 9 ## |
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10 ## Octave is free software: you can redistribute it and/or modify it |
| 11104 | 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. |
| 11104 | 14 ## |
| 15 ## Octave is distributed in the hope that it will be useful, but | |
| 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. |
| 10684 | 19 ## |
| 20 ## You should have received a copy of the GNU General Public License | |
| 11104 | 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 ######################################################################## |
| 10684 | 25 |
| 26 ## -*- texinfo -*- | |
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27 ## @deftypefn {} {[@var{ver}, @var{url}] =} get_forge_pkg (@var{name}) |
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28 ## Try to discover the current version of an Octave Forge package from the web, |
| 10684 | 29 ## using a working internet connection and the urlread function. |
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30 ## If two output arguments are requested, also return an address from which |
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31 ## to download the file. |
| 10684 | 32 ## @end deftypefn |
| 33 | |
| 34 function [ver, url] = get_forge_pkg (name) | |
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35 |
| 10684 | 36 ## Verify that name is valid. |
| 37 if (! (ischar (name) && rows (name) == 1 && ndims (name) == 2)) | |
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38 error ("get_forge_pkg: package NAME must be a string"); |
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39 elseif (! all (isalnum (name) | name == "-" | name == "." | name == "_")) |
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40 error ("get_forge_pkg: invalid package NAME: %s", name); |
| 10684 | 41 endif |
| 42 | |
| 43 name = tolower (name); | |
| 44 | |
| 45 ## Try to download package's index page. | |
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46 [html, succ] = urlread (sprintf ("https://packages.octave.org/%s/index.html", |
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47 name)); |
| 10684 | 48 if (succ) |
| 49 ## Remove blanks for simpler matching. | |
| 50 html(isspace(html)) = []; | |
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51 ## Good. Let's grep for the version. |
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52 pat = "<tdclass=""package_table"">PackageVersion:</td><td>([\\d.]*)</td>"; |
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53 t = regexp (html, pat, "tokens"); |
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54 if (isempty (t) || isempty (t{1})) |
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55 error ("get_forge_pkg: could not read version number from package's page"); |
| 10684 | 56 else |
| 57 ver = t{1}{1}; | |
| 58 if (nargout > 1) | |
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59 ## Build download string. |
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60 pkg_file = sprintf ("%s-%s.tar.gz", name, ver); |
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61 url = ["https://packages.octave.org/download/" pkg_file]; |
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62 ## Verify that the package string exists on the page. |
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63 if (isempty (strfind (html, pkg_file))) |
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64 warning ("get_forge_pkg: download URL not verified"); |
| 10684 | 65 endif |
| 66 endif | |
| 67 endif | |
| 68 else | |
| 69 ## Try get the list of all packages. | |
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70 [html, succ] = urlread ("https://packages.octave.org/list_packages.php"); |
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71 if (! succ) |
| 10684 | 72 error ("get_forge_pkg: could not read URL, please verify internet connection"); |
| 73 endif | |
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74 t = strsplit (html); |
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75 if (any (strcmp (t, name))) |
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76 error ("get_forge_pkg: package NAME exists, but index page not available"); |
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77 endif |
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78 ## Try a simplistic method to determine similar names. |
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79 function d = fdist (x) |
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80 len1 = length (name); |
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81 len2 = length (x); |
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82 if (len1 <= len2) |
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83 d = sum (abs (name(1:len1) - x(1:len1))) + sum (x(len1+1:end)); |
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84 else |
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85 d = sum (abs (name(1:len2) - x(1:len2))) + sum (name(len2+1:end)); |
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86 endif |
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87 endfunction |
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88 dist = cellfun ("fdist", t); |
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89 [~, i] = min (dist); |
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90 error ("get_forge_pkg: package not found: ""%s"". Maybe you meant ""%s?""", |
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91 name, t{i}); |
| 10684 | 92 endif |
| 93 | |
| 94 endfunction |