update packages

[CreaPhase.git] / octave_packages / m / miscellaneous / news.m

diff --git a/octave_packages/m/miscellaneous/news.m b/octave_packages/m/miscellaneous/news.m
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+++ b/octave_packages/m/miscellaneous/news.m
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+## Copyright (C) 2007-2012 John W. Eaton
+##
+## This file is part of Octave.
+##
+## Octave 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.
+##
+## Octave 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 Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} news (@var{package})
+## Display the current NEWS file for Octave or installed package.
+##
+## If @var{package} is the name of an installed package, display the current
+## NEWS file for that package.
+## @end deftypefn
+
+function news (package = "octave")
+
+  if (ischar (package) && strcmpi (package, "octave"))
+    octetcdir = octave_config_info ("octetcdir");
+    newsfile  = fullfile (octetcdir, "NEWS");
+
+  elseif (nargin == 1 && ischar (package))
+    installed = pkg ("list");
+    names     = cellfun (@(x) x.name, installed, "UniformOutput", false);
+    ## we are nice and let the user use any case on the package name
+    pos = strcmpi (names, package);
+    if (!any (pos))
+      error ("Package '%s' is not installed.", package);
+    endif
+    newsfile = fullfile (installed{pos}.dir, "packinfo", "NEWS");
+
+  else
+    print_usage;
+  endif
+
+  if (exist (newsfile, "file"))
+    f = fopen (newsfile, "r");
+    while (ischar (line = fgets (f)))
+      puts (line);
+    endwhile
+  else
+    if (strcmpi (package, "octave"))
+      error ("news: unable to locate NEWS file");
+    else
+      error ("news: unable to locate NEWS file of %s package", package);
+    endif
+  endif
+
+endfunction
+
+## Remove from test statistics.  No real tests possible
+%!assert (1)